JP7292450B2 - Built-in compound type heating cooker and kitchen furniture - Google Patents

Description

TECHNICAL FIELD The present invention relates to a built-in composite heating cooker equipped with two or more types of heating sources and kitchen furniture such as a kitchen counter equipped with these heating cookers.

There are three main types of induction heating cookers.
One of them is a so-called "built-in type" installed in kitchen furniture such as a kitchen counter.
The second type is a "stationary type" that is placed in a predetermined position of kitchen furniture like a gas stove (also called a "gas combustion table") or the like.
The third type is a small and portable "desktop type" that is placed at any position on a dining table or the like.

Since the “built-in type” induction heating cooker is installed inside the kitchen furniture, the outer dimensions must be designed according to the standard of general kitchen furniture. The degree of freedom of design is much smaller than that of the conventional one.

In addition, some built-in induction heating cookers are installed in the storage space of the kitchen furniture as a single heating cooker, and secure an article storage (storage space) below the heating cooker (for example, See Patent Document 1).

In addition, some built-in induction heating cookers are equipped with a grill chamber (also called "oven chamber" or "heating chamber") heated by an electric heater inside the main body so that the range of cooking can be expanded. . In the grill chamber, a door provided on the front is opened, an object to be heated such as fish is inserted, the door is closed, and cooking is possible by heating with radiant heat of the electric heater (for example, Patent Documents 2 and 3 reference).

The induction heating cooker of Patent Document 2 includes at least two heating means for heating an object to be heated having an induction heating coil (hereinafter referred to as "IH coil") arranged in a housing, and covering the upper surface of the heating means It has a top plate on which a cooking pot to be heated is placed, and an inverter circuit board (electronic board) on which electronic components for supplying power to the IH coil are mounted, and the electronic components on the inverter circuit board and A cooling fan that cools the IH coil, a first cooling passage that guides cooling air from the cooling fan to the periphery of the inverter circuit board, and a second cooling passage that guides cooling air from the cooling fan to the IH coil. and a circuit board on which at least part of a control circuit for controlling the inverter circuit and a power supply circuit for supplying power to the inverter circuit are mounted in the second cooling flow path. be.

In Patent Document 3, a proposal is made to hang a grill unit provided with a grill chamber in a detachable manner from the induction heating cooking unit by fixing means such as metal fittings. However, in Patent Document 3, the thickness (height dimension) of the casing (outer shell case) of the induction heating cooking unit is the same as the thickness of the mounting portion of the kitchen furniture (for example, the standard dimension of 40 mm). It is much larger than the , and protrudes downward.

There is also proposed a built-in induction heating cooker configured by combining two units, an upper unit and a lower unit. The upper unit incorporates a plurality of IH coils and an inverter circuit board for controlling them, and the lower unit incorporates a grill chamber and electrical equipment. The lower unit includes one fan motor and a cooling fan rotated by the fan motor, and the inverter circuit of the upper unit is operated by the blowing action of the cooling fan rotated by the fan motor. A configuration has also been proposed in which the substrate and the electrical components of the lower unit are cooled in parallel (see Patent Document 4, for example).

In addition, in the built-in induction heating cooker, cooling air is introduced from the outside of the housing into the housing (also called "outer shell case") supported by the kitchen furniture, and the cooling air A configuration has been proposed in which a driving circuit portion of a heating coil (hereinafter referred to as "IH coil") and the IH coil are cooled in diagonal directions (see, for example, Patent Document 5). This configuration is adopted for the purpose of uniformly and efficiently cooling the drive circuit section and the IH coil.

As for the heating source of the composite heating cooker, various proposals have conventionally been made with two different heating methods, ie, induction heating and microwave heating. However, all of them are based on the premise of "stationary type" (for example, see Patent Documents 6 and 7).

Furthermore, using two different heating methods of heating sources (induction heating and dielectric heating), three types of induction heating in the ceiling of the heating cooker, induction heating in the heating chamber, and microwave heating in the heating chamber A composite heating cooker has also been proposed in which the heating mode can be alternatively selected. However, this is also based on the premise of a "stationary type" in which the overall size and shape of the cooking device can be determined much more freely (compared to the built-in type) (see Patent Document 8).

JP 2015-213628 (page 5, FIG. 1) Japanese Patent Application Laid-Open No. 2008-53075 (page 5, FIG. 8) Japanese Patent Application Laid-Open No. 5-251165 (page 1, FIG. 2) Japanese Patent Application Laid-Open No. 11-87038 (page 3, FIG. 1) Japanese Patent Application Laid-Open No. 5-21148 (page 1, FIG. 2) Japanese Utility Model Laid-Open No. 53-44345 (page 1, FIG. 2) Japanese Utility Model Laid-Open No. 53-44346 (page 1, FIG. 3) Japanese Patent Application Laid-Open No. 52-37242 (page 1, FIG. 1)

The first problem with the conventional built-in cooking device is that the height of the cooking device is large, which hinders effective use of the space in the kitchen furniture below the cooking device. Therefore, for example, it has led to the problem that the height of the article storage cannot be increased.
On the other hand, in a stationary cooking device, if the height dimension of the cooking device is large as in the first problem, when placed on a kitchen counter or the like, an object to be heated such as a pot may be placed on the cooking device. There was a problem that it was difficult to work when unloading or moving.

Furthermore, the second problem is that it is difficult to install the built-in composite cooking device using microwave heating in kitchen furniture such as a kitchen counter. In other words, conventionally, although a heating chamber (also called a "grill chamber") equipped with an electric heater is provided, the one using microwave heating has not been put into practical use. As a background to this, when using microwaves, a microwave oscillator typified by a magnetron, a cooling fan that cools the oscillator, a waveguide that guides microwaves into the heating chamber, and microwaves that enter the heating chamber. It is difficult to reduce the size of important electric parts, structures, etc., such as an antenna device to be diffused, due to the nature of handling microwaves.

Furthermore, as a third problem, a built-in composite heating cooker (see Patent Document 2) has been proposed, which includes an upper unit having an induction heating source and a lower unit having a built-in heating chamber heated by radiant heat. However, adding a microwave heating function and improving it so that it can handle a wider range of cooking poses a major challenge. For example, in order to prevent microwaves with properties different from those of induction heating sources and electric heaters from leaking out of the heating chamber, it is necessary to seal the heating chamber in terms of radio waves. unit) and a lower unit equipped with a heating chamber to which microwaves are supplied. It is necessary to maintain the performance and reliability of the built-in composite heating cooker as a whole while installed.

A fourth object is to obtain highly convenient kitchen furniture that can be used for a wide variety of cooking by means of an induction heating source and a microwave heating source.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and provides a convenient built-in composite heating cooker capable of using a plurality of types of heating sources, and kitchen furniture equipped with these. With the goal.

The heating cooker of the first example related to the first problem is
Having a flat body with a top plate on which the object to be heated is placed,
Inside the main body, an IH coil for heating an object to be heated on the top plate, an inverter circuit board arranged below the IH coil, and an inverter circuit board installed between the IH coil and the inverter circuit board. and a first cooling fan that introduces cooling air from the outside of the main body,
The first cooling fan has rotary blades that rotate about a vertical axis, and faces an entrance of a first air passage formed between the inverter circuit board and the cover,
The first cooling fan is configured to supply cooling air from an inlet at one end of the first air passage to an outlet at the other end.

The heating cooker of the second example related to the first problem is
Having a flat body with a top plate on which the object to be heated is placed,
Inside the main body, a left IH coil and a right IH coil are arranged at two positions on the left and right sides for heating an object to be heated on the top plate, and common to these two IH coils, and An inverter circuit board arranged below the IH coils, a cover installed between the two IH coils and the inverter circuit board, and a cover installed near the left wall surface of the main body and formed in the housing a first cooling fan that introduces cooling air from the vent,
The cover is installed in series from the blowout port of the first cooling fan to the right side of the left IH coil from directly below,
The first cooling fan has rotary blades that rotate about a vertical axis, and faces an entrance of a first air passage formed between the inverter circuit board and the cover,
The first cooling fan supplies cooling air from an inlet at the left end of the first air passage toward an outlet at the right end,
An exhaust window through which the cooling air emitted from the first air passage is introduced after passing through the upper space of the cover is provided at the inner rear part of the main body,
A configuration is characterized in that the formation position of the exhaust window is on the left side of the position of the exit of the first air passage.

The heating cooker of the third example related to the first problem is
Having a flat body with a top plate on which the object to be heated is placed,
Inside the main body, an IH coil for heating an object to be heated on the top plate, an inverter circuit board arranged below the IH coil, and an inverter circuit board installed between the IH coil and the inverter circuit board. a cover, a first cooling fan and a second cooling fan that introduce cooling air from the outside of the main body, and an input operation unit that receives a user's operation input,
The first cooling fan has a rotor that rotates about a vertical axis,
The first cooling fan faces the entrance of a first air passage formed between the inverter circuit board and the cover, and the first cooling fan is located at one end of the first air passage. A first cooling air is supplied from an inlet toward an outlet at the other end,
The second cooling fan is positioned closer to the input operation section than the first cooling fan, and is configured to supply second cooling air to the input operation section.

The heating cooker of the fourth example related to the first problem is
Having a flat body with a top plate on which the object to be heated is placed,
Inside the main body, an IH coil for heating an object to be heated on the top plate, an inverter circuit board arranged below the IH coil, and an inverter circuit board installed between the IH coil and the inverter circuit board. a cover, a first cooling fan that introduces cooling air from the outside of the main body, and a power supply circuit board that receives power from a commercial power supply and generates necessary power,
The first cooling fan has a rotor that rotates about a vertical axis,
The first cooling fan faces the entrance of a first air passage formed between the inverter circuit board and the cover, and the first cooling fan is located at one end of the first air passage. A configuration in which cooling air is supplied from an inlet toward an outlet at the other end,
The power supply circuit board is arranged on the opposite side of the first cooling fan with the cover interposed therebetween.

The heating cooker of the fifth example related to the first problem is
Having a flat body with a top plate on which the object to be heated is placed,
Inside the main body, an IH coil for heating an object to be heated on the top plate, an inverter circuit board arranged below the IH coil, and an inverter circuit board installed between the IH coil and the inverter circuit board. and a first cooling fan that introduces cooling air from the outside of the main body,
The first cooling fan has a rotor that rotates about a vertical axis,
The first cooling fan has an intake port on the bottom surface of the fan case and an outlet port for blowing cooling air on the side surface,
A first air passage formed below the cover on a first horizontal plane crossing the center of the upper and lower sides of the air outlet, a heat sink arranged on the upper surface of the inverter circuit board, and a heat sink mounted on the inverter circuit board. , respectively, and
An exhaust window for discharging cooling air from the first cooling fan after passing through the IH coil is arranged on a second horizontal plane above the first horizontal plane.

The built-in composite heating cooker of the sixth example related to the second problem is
It is installed in the kitchen furniture,
an upper unit that has a first heating source that heats the object to be heated via a top plate on which the object to be heated is placed and that is supported by the kitchen furniture;
a lower unit having a heating chamber installed below the upper unit and having a front opening closed by a door so as to be openable and closable;
The lower unit includes a microwave heating device for supplying microwaves to the heating chamber, an oven heating device for heating the heating chamber, and a cooling fan for cooling the microwave heating device,
The microwave generation source of the microwave heating device is arranged along one of the left and right side walls of the heating chamber, and the oscillating portion of the microwave generation source protrudes to the back side of the heating chamber. placed horizontally,
A feed port leading to the interior of the heating chamber and an antenna case into which microwaves from the microwave generation source are introduced are provided on the back side of the heating chamber,
In the antenna case, a rotatable antenna is arranged for propagating the microwaves oscillated from the microwave generation source to the space in the heating chamber through the feeding port.

The built-in composite heating cooker of the seventh example related to the second problem is
It is installed in the kitchen furniture,
an upper unit that has an induction heating source that heats the object to be heated via a top plate on which the object to be heated is placed and that is supported by the kitchen furniture;
a lower unit having a heating chamber installed below the upper unit and having a front opening closed by a door so as to be openable and closable;
The lower unit includes a microwave heating device that receives power from the upper unit and supplies microwaves to the heating chamber, an oven heating device that heats the heating chamber, and a cooling device that cools the microwave heating device. with a cooling fan for
The microwave generation source of the microwave heating device is arranged along one right wall surface or left wall surface of the heating chamber, and is oriented sideways so that the oscillation part of the microwave generation source protrudes to the back side of the heating chamber. is installed in
An antenna case for introducing microwaves from the microwave generation source is provided on the back side of the heating chamber,
In the antenna case, a rotatable antenna for propagating microwaves oscillated from the microwave generation source to the space in the heating chamber through a feeding port provided on the back surface of the heating chamber. place and
The induction heating source, the microwave heating device, the oven heating device, and the cooling fan are configured to be controlled in operation by an integrated control device on the upper unit side.

The eighth example of the built-in composite heating cooker related to the second problem is
It is installed in the kitchen furniture,
an upper unit that has an induction heating source that heats the object to be heated via a top plate on which the object to be heated is placed and that is supported by the kitchen furniture;
a lower unit having a heating chamber installed below the upper unit and having a front opening closed by a door so as to be openable and closable;
The lower unit includes a microwave heating device that receives power from the upper unit and supplies microwaves to the heating chamber, and an oven heating device that heats the heating chamber,
The microwave heating device includes a microwave heating control unit, a microwave generation source, and a first inverter circuit board that supplies high-frequency power to the microwave generation source,
The oven heating device includes a heating chamber control unit,
The microwave generation source and the first are arranged along one side wall surface of the heating chamber and separated in the front-rear direction,
Air is sucked from the outside of the lower unit below the first inverter circuit board and below the heat dissipation part of the microwave generation source, respectively, and the air is transferred to the first inverter circuit board and the heat dissipation part. A configuration in which a front side cooling fan and a rear side cooling fan that individually supply the parts are arranged,

The built-in composite heating cooker of the invention related to the second problem is
A kitchen furniture comprising: a first heating source for heating an object to be heated via a top plate on which the object to be heated is placed; and a flat main body having an upper opening closed by the top plate. an upper unit supported by
a lower unit containing a heating chamber to which microwaves are supplied and a microwave generation source;
a connecting member that connects the upper unit and the lower unit,
The connecting member is installed in close or close contact with at least one side wall surface of the lower unit and at least one side wall surface of the upper unit, and is coupled to both the lower unit and the upper unit. and
The upper unit has a box-shaped upper case forming an outer shell,
The upper end of the upper case has a horizontally extending flange,
The lower unit has a box-shaped lower case forming an outer shell.
A support piece is formed on the upper end of the connecting member so as to come close to or abut on the lower surface of the flange while being fixed to the upper case and the lower case.

A built-in composite heating cooker of another invention related to the third problem is
A kitchen furniture comprising: a first heating source for heating an object to be heated via a top plate on which the object to be heated is placed; and a flat main body having an upper opening closed by the top plate. an upper unit supported by
A heating chamber to which microwaves are supplied, and a lower unit in which a microwave generation source is built in a lower case,
The upper case and the lower case constituting the outer shell of the main body are each formed of a thin metal plate,
A lateral vertical wall extending vertically is formed at the peripheral edge of the upper case,
The entire upper surface of the lower case is open, and the upper unit and the lower unit are connected in a state in which the upper case is fitted inside the opening,
The microwave generation source is configured such that power generated by a power circuit board inside the upper unit is supplied as a control power source.
In addition, a built-in composite heating cooker of another invention related to the third problem is
A kitchen furniture comprising: a first heating source for heating an object to be heated via a top plate on which the object to be heated is placed; and a flat main body having an upper opening closed by the top plate. an upper unit supported by
A heating chamber to which microwaves are supplied, and a lower unit in which a microwave generation source is built in a lower case,
The upper case and the lower case constituting the outer shell of the main body are each formed of a thin metal plate,
A lateral vertical wall extending vertically is formed at the peripheral edge of the upper case,
The entire upper surface of the lower case is open, and the upper unit and the lower unit are connected in a state in which the upper case is fitted inside the opening,
The lower unit further comprises an oven heating device for heating the heating chamber,
The microwave generation source and the oven heating device are configured such that power generated by a power supply circuit board inside the upper unit is supplied as power for control.
In addition, a built-in composite heating cooker of another invention related to the third problem is
A kitchen furniture comprising: a first heating source for heating an object to be heated via a top plate on which the object to be heated is placed; and a flat main body having an upper opening closed by the top plate. an upper unit supported by
A heating chamber to which microwaves are supplied, and a lower unit in which a microwave generation source is built in a lower case,
The upper case and the lower case constituting the outer shell of the main body are each formed of a thin metal plate,
A lateral vertical wall extending vertically is formed at the peripheral edge of the upper case,
The entire upper surface of the lower case is open, and the upper unit and the lower unit are connected in a state in which the upper case is fitted inside the opening,
The lower case includes an inverter circuit board that supplies high-frequency power to the microwave generation source, and a front cooling fan that is below the inverter circuit board and supplies cooling air to the inverter circuit board. , a rear cooling fan for supplying cooling air to the heat radiating part and an oven heating device for heating the heating chamber are arranged below the heat radiating part of the microwave generation source,
The operation of the first heating source, the microwave generation source, the oven heating device, the front cooling fan, and the rear cooling fan is controlled by an integrated control device on the upper unit side,
Neither the front-side cooling fan nor the rear-side cooling fan is operated while the upper unit is cooking with only the first heat source.

The built-in composite heating cooker of the eleventh example related to the second problem,
It has a top plate on which an object to be heated is placed, an induction heating source for heating the object to be heated via the top plate, and a flat upper case whose top opening is closed by the top plate. and an upper unit supported by kitchen furniture;
A heating chamber to which microwaves are supplied, and a lower unit in which a microwave heating device is built in a lower case,
When the upper case is placed on the lower case, the bottom wall of the upper case also serves as the ceiling surface of the lower case.

The built-in composite heating cooker of the twelfth example related to the third problem,
It has a top plate on which an object to be heated is placed, an induction heating source for heating the object to be heated via the top plate, and a flat upper case whose upper surface opening is closed by the top plate. a cage and an upper unit supported by kitchen furniture;
a lower unit containing a heating chamber heated from above and below by an upper heater and a lower heater, respectively;
The lower unit has a lower case that forms an outer shell, a door that opens and closes the opening of the heating chamber, an arm that supports the door, and a door open/close detection mechanism,
The lower unit comprises a microwave generation source and a case containing an inverter circuit board for supplying high-frequency power to the microwave generation source on the right or left side of the heating chamber,
Arranging the case on the front side of the microwave generation source,
A space is provided on the front side of the case inside the lower unit,
The space accommodates the arm and the door opening/closing detection mechanism so that they are adjacent to each other and the door opening/closing detection mechanism is on the outside.

A kitchen furniture of a thirteenth example related to the fourth problem has an installation opening on the upper surface, and any one of the heating cooker of the first invention to the fifth invention is installed in the installation opening. It is a configuration that

A kitchen furniture according to a fourteenth invention related to the fourth problem has an installation opening on the upper surface, and a built-in composite heating cooker according to any one of the above inventions or other inventions is installed in the installation opening. It is a configuration that

ADVANTAGE OF THE INVENTION According to this invention, the installation space which a heating cooker occupies can be reduced, or the combined cooking device and kitchen furniture with high convenience which can respond to various heat cooking can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the whole kitchen furniture in which the induction heating cooker which concerns on Embodiment 1 of this invention is installed. 1. It is a perspective view which shows the state of the kitchen furniture before incorporating the induction heating cooker shown in FIG. It is a schematic diagram which shows the intermediate stage of the operation|work which incorporates the induction-heating cooker shown in FIG. 1 into kitchen furniture. FIG. 2 is a schematic vertical cross-sectional view showing the dimensional relationship between the kitchen furniture in FIG. 1 and the induction heating cooker. FIG. 5 is a schematic vertical cross-sectional view showing an enlarged front part of the kitchen furniture shown in FIG. 4 ; FIG. 2 is a plan view of the induction heating cooker shown in FIG. 1; FIG. 7 is a vertical cross-sectional view of the induction heating cooker of FIG. 1 taken along line ZZ of FIG. 6; FIG. 7 is a vertical cross-sectional view of the induction heating cooker of FIG. 1 taken along line ZZ of FIG. 6 and showing the flow of cooling air. FIG. 8 is a vertical cross-sectional view of the induction heating cooker of FIG. 1 taken along line WW of FIG. 7; FIG. 8 is a vertical cross-sectional view of the induction heating cooker of FIG. 1 taken along line YY of FIG. 7; FIG. 8 is a vertical cross-sectional view of the induction heating cooker of FIG. 1 taken along line VV of FIG. 7; FIG. 8 is a vertical cross-sectional view of the induction heating cooker of FIG. 1 taken along line XX of FIG. 7; FIG. 2 is a simplified plan view for explaining an operating portion of the upper unit of the induction heating cooker of FIG. 1; FIG. 2 is a simplified cross-sectional view showing the flow of cooling air inside the upper unit of the induction heating cooker of FIG. 1; FIG. 2 is a block diagram showing main control-related parts of the induction heating cooker of FIG. 1; FIG. 2 is an explanatory view showing main cooling air passages of the induction heating cooker of FIG. 1; 2 is a circuit diagram showing details of an inverter circuit of the induction heating cooker of FIG. 1. FIG. FIG. 2 is a flowchart 1 for explaining the control operation of the induction heating cooker of FIG. 1; FIG. FIG. 2 is a flowchart 2 for explaining the control operation of the induction heating cooker of FIG. 1; FIG. 3 is a flowchart 3 for explaining the control operation of the induction heating cooker of FIG. 1; FIG. 4 is a flowchart 4 for explaining the control operation of the induction heating cooker of FIG. 1; FIG. FIG. 5 is a flowchart 5 for explaining the control operation of the induction heating cooker of FIG. 1; FIG. FIG. 5 is a flowchart 5 for explaining the control operation of the induction heating cooker of FIG. 1; FIG. 1. It is a list which shows the correspondence of the cooling fan of the induction heating cooker of FIG. 1, and the kind of heat cooking. FIG. 2 is a flow chart for explaining the control operation of the induction heating cooker of FIG. 1 when fried food cooking (automatic), which is one type of induction heating cooking, is performed. FIG. FIG. 8 is a perspective view of the built-in induction heating cooker according to Embodiment 2 of the present invention before being installed on kitchen furniture; FIG. 27 is a perspective view showing a state in which the door is opened in the induction heating cooker shown in FIG. 26; FIG. 27 is a front view of the induction heating cooker shown in FIG. 26; FIG. 27 is a plan view of the induction heating cooker shown in FIG. 26; 27 is a right side view of the induction heating cooker shown in FIG. 26. FIG. Fig. 27 is a left side view of the induction heating cooker shown in Fig. 26; 27 is a back (rear) view of the induction heating cooker shown in FIG. 26. FIG. 27 is a bottom (lower) view of the induction heating cooker shown in FIG. 26. FIG. FIG. 30 is a longitudinal sectional view taken along line ZZ of the induction heating cooker shown in FIG. 29; FIG. 30 is a vertical cross-sectional view of the induction heating cooker shown in FIG. 29 taken along the line YY. FIG. 29 is a longitudinal sectional view taken along the line YY of the induction heating cooker shown in FIG. 29, showing a state in which the door is opened; FIG. 30 is a longitudinal sectional view taken along the line XX of the induction heating cooker shown in FIG. 29; 27 is a perspective view showing the entire upper unit in the induction heating cooker shown in FIG. 26. FIG. FIG. 27 is a perspective view of the upper unit of the induction heating cooker shown in FIG. 26 with the top plate removed; FIG. 27 is a perspective view of the upper unit of the induction heating cooker shown in FIG. 26 with the top plate and the IH coil removed; 27 is a perspective view of the upper unit of the induction heating cooker shown in FIG. 26 with the top plate, IH coil and cover removed. FIG. FIG. 42 is a reference perspective view showing the flow of cooling air in FIG. 41; 27 is a plan view, a front view, a right side view and a rear view of the upper unit in the induction heating cooker shown in FIG. 26. FIG. 27 is a plan view, a front view, a right side view and a rear view of the upper unit shown in FIG. 26 with both the top plate and the IH coil removed. FIG. 27 is a plan view, a front view, a right side view and a rear view of the upper unit shown in FIG. 26 with the top plate, the IH coil and the cover removed. FIG. 27 is a bottom (lower) view of the upper unit of the induction heating cooker shown in FIG. 26. FIG. FIG. 44 is a vertical cross-sectional view taken along the line XX of the upper unit shown in FIG. 43; FIG. 44 is a vertical cross-sectional view taken along the line XX of the upper unit shown in FIG. 43; FIG. 44 is a vertical cross-sectional view along the ZZ line of the upper unit shown in FIG. 43; Fig. 27 is a perspective view 1 showing an exploded state of the induction heating cooker shown in Fig. 26; FIG. 27 is a perspective view 2 showing an exploded state of the induction heating cooker shown in FIG. 26; FIG. 27 is a perspective view of a connecting member (reinforcing member) of the induction heating cooker shown in FIG. 26; FIG. 27 is a perspective view showing an intermediate stage of disassembly of the lower unit of the induction heating cooker shown in FIG. 26; FIG. 27 is a cross-sectional view for explaining the main part of the lower unit of the induction heating cooker shown in FIG. 26; Fig. 10 is a cross-sectional view showing a main part of a lower unit of a built-in induction heating cooker according to Embodiment 3 of the present invention; FIG. 56 is a cross-sectional view for explaining the main part of the induction heating cooker shown in FIG. 55; FIG. 11 is a vertical cross-sectional view illustrating the entire built-in induction heating cooker according to Embodiment 4 of the present invention. FIG. 11 is a vertical cross-sectional view illustrating the entire built-in induction heating cooker according to Embodiment 5 of the present invention. FIG. 11 is a block diagram illustrating the entire built-in induction heating cooker according to Embodiment 6 of the present invention;

Embodiment 1.
1 to 25 show a built-in induction heating cooker according to Embodiment 1. FIG. It should be noted that in the following description, unless there is a particular contradiction, it will simply be referred to as a "cooker".
In each figure, the symbol RT indicates the right direction of the heating cooker 1, and the symbol LE indicates the left direction. FT indicates the front, and BK indicates the rear.

In this Embodiment 1, the "induction heating cooker" refers to a device having a heating portion based on the principle of induction heating. When there are a plurality of heating units, there may be a heating source of a method other than the induction heating method, such as a radiant electric heating source.

In this Embodiment 1, the "heating means (heat source)" of the heating chamber may be either a heat source that heats the wall surface of the heating chamber from the outside, or a heat source that is installed in the inner space of the heating chamber. .
Alternatively, a heat generating member that heats to a high temperature by an induction heating method may be arranged, and the heat generating member may heat the wall surface of the heating chamber from the outside or heat the air in the heating chamber.

For example, Japanese Patent Document 2017-74305 describes a cooking dish placed in a heating chamber (grill chamber) on which the food to be cooked is placed, which heats the food from below. A heating cooker has been proposed that includes a heating element (induction heating coil) and a third heating element (induction heating coil) that heats an object to be cooked from the side.

Furthermore, in Japanese Patent Application Laid-Open No. 2016-85996, the lower part of the heating chamber is divided vertically by an electrical insulator, and an induction heating coil (IH coil) is provided in the lower space of the electrical insulator, and the IH heating coil Arrangements have been proposed for inductively heating a cooking plate placed on top of the plate. The cooking plate is made of a material that can be heated by induction. For example, iron, stainless steel, a carbon material with a carbon content of 90% or more, a ceramic material containing Si (silicon) or FeSi (ferro-silicon) as a conductive material, or the like is used. It is

In addition, as a representative example of arranging a heat-generating member that becomes hot by an induction heating method, Japanese Patent Application Laid-Open No. 2005-071695 discloses that a high-frequency current is supplied to an IH coil to generate a high-frequency magnetic flux in the IH coil. A high-frequency magnetic flux is interlinked with a heater arranged in a heating chamber so that an induced current flows through the heater, and the food in the heating chamber can be cooked by Joule heat generated by the electrical resistance of the heater itself. disclosed.

Furthermore, in Japanese Patent Application Laid-Open No. 2013-247048, an electrically closed circuit heater is arranged inside the heating chamber, and a high-frequency magnetic flux generated from an IH coil arranged outside the heating chamber is linked to the heater. It has been proposed to heat the heater to a high temperature to dissipate heat into the heating chamber. The heater here is an electrically closed circuit formed by bending a round bar or round pipe made of stainless steel or high-nickel alloy into a predetermined shape and joining the ends together by welding or brazing. It is formed in an endless shape.

In the "IH coil" referred to in the first embodiment, as a typical one, about 30 thin copper wires or aluminum wires of about 0.1 mm to 0.3 mm are bundled, and a plurality of the bundles are twisted. There is a coiled structure (for example, Japanese Patent Document 1, Japanese Patent Application Laid-Open No. 2012-79580).

Further, Japanese Patent Application Laid-Open No. 2018-32551 proposes an induction heating cooker that uses an annular conductor, which is a heating coil formed by annularly forming a plate-like conductive material.
Any one of these forms corresponds to the IH coil.

In this Embodiment 1, the term “coordinated cooking” refers to two types of heating in which one cooking object (including food, meat, vegetables, etc.) is heated in different places and the heating operation conditions can be set independently. Refers to cooking using a source.

The above-mentioned "cooperation cooking" corresponds to a case where a plurality of heat sources are used with a time lag. For example, in the process of completing one cooking, after completing microwave heating and preheating, the food to be cooked is moved to another place, and at the place after the movement, it is heated by the IH coil 17L described later. In the case, it is a kind of "cooperation cooking" referred to here.

Coordinated cooking has been proposed in the form of a built-in type heating cooker in Japanese Patent No. 5833699 and Japanese Patent No. 5500944.

1 to 25, the heating cooker 1 of Embodiment 1 is, for example, a heating cooker incorporated in kitchen furniture (including furniture called a system kitchen) 2 with a sink. 2A is an installation opening formed in the kitchen furniture 2 . The heating cooker 1 is supplied with AC power having a voltage of 200 V and a frequency of 50 Hz or 60 Hz from a commercial power supply 99 as described later.

As shown in FIGS. 1 and 13, the heating cooker 1 of Embodiment 1 has two induction heating units on the left and right sides. Circular position marks 17LS and 17RS are provided on the upper surface of the top plate 15 to indicate the desired positions for placing objects to be heated such as metal pans. By looking at the circular position marks 17LS and 17RS, the user of the heating cooker 1 can recognize that the heating cooker 1 of Embodiment 1 has two induction heating portions on the left and right. It should be noted that the user can also recognize that there are two induction heating units on the left and right by the voice guidance of the voice synthesizer 95, which will be described later.

The position marks 17LS and 17RS are formed by printing. Directly below the position marks 17LS and 17RS, induction heating coils (hereinafter referred to as "IH coils") 17L and 17R are installed. Note that the position marks 17LS and 17RS do not have to be circular, and for example, only the central point of the desired position where the object to be heated is placed may be indicated by a figure, a symbol such as "+", or letters.

Since the position marks 17LS and 17RS are circular marks indicating the approximate positions where induction heating can be performed by the IH coils 17L and 17R, they are drawn with a slightly larger diameter than the maximum outer diameter of the IH coils 17L and 17R .

Either one of the IH coils 17L and 17R may be replaced with a radiant heat source such as a radiant heater or an infrared heater. Alternatively, in addition to the IH coils 17L and 17R, a radiant electric heat source may be provided to have three or more heating portions.

In the first embodiment, the IH coils 17L and 17R are collectively referred to as "induction heating sources" hereinafter. In this case, 17 is used as the code. Therefore, when the induction heating source 17 is called, it may be both the IH coils 17L and 17R, or either one of them.

The heating cooker 1 is placed and supported on the rim upper surface 2P of the installation opening 2A. As shown in FIG. 2, the kitchen furniture 2 in the first embodiment includes a water tank 2C that can temporarily store water coming out of a water supply port 2D. 2B is a front opening formed at a predetermined position of the kitchen furniture 2, and when the heating cooker 1 is incorporated, this front opening exposes front components (a door 114 and a front cover 112, which will be described later) forward. It is for

If the sizes of the front opening 2B and the installation opening 2A of the kitchen furniture 2 are standard, they are mostly formed in advance with standard dimensions because standardization is promoted by the industry. be. More on this later.

A typical method of incorporating the cooker 1 into the kitchen furniture 2 is as shown in FIG. This FIG. 3 is a schematic diagram showing an intermediate stage of the assembly work to the kitchen furniture 2. As shown in FIG.
As shown in FIG. 3, while the front side (front side) of the heating cooker 1 is tilted downward, the heating cooker 1 is inserted into the installation opening 2A, and then the rear side of the heating cooker 1 is placed. is lowered as indicated by a solid arrow BD, the heating cooker 1 is placed on the periphery of the installation opening 2A of the kitchen furniture 2. As shown in FIG.

After that, the screws are tightened to move (rotate) a fixing metal fitting (not shown) installed on the rear periphery of the lower unit 100 to be described later, and the fixing metal fitting is strongly pressed against the kitchen furniture 2. to complete the installation. Since such an installation method has already been widely adopted, detailed description of the structure will be omitted.

As shown in FIG. 3, the main body 10 of the heating cooker 1 is combined and integrated with the upper unit 100 and the lower unit 200 stacked vertically. 3, only the upper unit 100 is fixed to the kitchen furniture 2 with the screws in the assembly work shown in FIG. The heating cooker 1 can be removed from the kitchen furniture 2 by removing the fixing bracket (not shown). Thereby, after that, inspection and repair can be performed outside the kitchen furniture 2. - 特許庁

The installation opening 2A formed in the kitchen furniture 2 has a rectangular planar shape as shown in FIG. However, the four corners are arcuate.
The width dimension W1 of the installation opening 2A is 560 mm to 564 mm. Also, the dimension D1 in the front-rear direction is formed to be 460 mm to 464 mm.

In FIGS. 1 and 2, 3 and 4 are surface materials forming the surface of the kitchen furniture 2. FIG. 5 and 6 are surface materials adjacent to both left and right sides when the heating cooker 1 is incorporated in the kitchen furniture 2 .
The front surfaces of these surface members 3 to 6 are substantially flush with the front surface of the cooking device 1 when the cooking device 1 is incorporated in the kitchen furniture 2.例文帳に追加In other words, when the heating cooker 1 is incorporated, the surface members 3 to 6 and the heating cooker 1 can provide the user with a sense of design as if they are on a unified plane.

In FIG. 3, reference numeral 8 denotes a wall that vertically partitions the interior of the kitchen furniture 2 into a plurality of rooms, and the area below this wall is often used as a storehouse for kitchen utensils, food, and the like. Note that the illustration of the wall 8 is omitted in FIG. Alternatively, the wall 8 may be detachably installed inside the kitchen furniture 2 .

With the configuration described above, when the heating cooker 1 is incorporated in the kitchen furniture 2, the entire front surface of the kitchen furniture 2 presents substantially one plane. When the user sees the kitchen furniture 2, it is designed so that the front (front) as a whole can be recognized as having a clean and unified design.

The kitchen furniture 2 and the heat cooker 1 do not have to be designed by the same manufacturer. They are often manufactured and sold.

In FIGS. 1 and 2, reference numeral 7 denotes a frame line printed on the front surfaces of the surface members 3 to 5, and does not form physical irregularities on the front surfaces of the surface members 3 to 5. FIG. It should be noted that a thin glossy metal plate, tape, or the like may be affixed to indicate the presence of the frame line 7 to give a sense of quality.

The four types of surface materials 3 to 6 may be the same. Moreover, these surface members 3 to 6 do not have to move back and forth like doors and drawers. For example, it may always exist on the surface of the kitchen furniture 2 in a fixed state and not move at all.

If the four types of surface materials 3 to 6 are unified in front surface color and surface form (pattern, presence/absence of gloss, unevenness, etc.), the sense of uniform design of the kitchen furniture 2 is enhanced. For example, if the entire front surface of the surface material 4 is unified in a single color or wood grain design, the front surface of the surface material 3 may also be unified in the same single color or wood grain design.

Next, FIGS. 4 and 5 will be described. FIG. 4 is a schematic vertical cross-sectional view showing the dimensional relationship between the kitchen furniture 2 and the heating cooker 1 in FIG. FIG. 5 is a schematic vertical cross-sectional view showing an enlarged front part of the kitchen furniture 2 shown in FIG.

As for kitchen furniture 2, etc., standardization (common) of housing parts and materials is being promoted in Japan by the "Consortium for Promoting Standardization of Housing Materials for Long-term Use" (abbreviation: Nagajukyo).

According to the "Long-term Use Material Standards for IH Cooking Heaters (Built-in)" enacted by the "Choujukyo", the conditions that the countertop (kitchen furniture 2) on which the IH cooking heater is installed are as follows. stipulated.
(1) The installation opening 2A has a width dimension W1 of 560 mm to 564 mm. Also, the dimension D1 in the front-rear direction shall be 460 mm to 464 mm.
(2) The height dimension C1 of the front descending portion 2F should be 40 mm or less.
(3) The depth (front-rear direction) dimension D3 of the front descending portion 2F should be 45 mm or less.
(4) The ceiling portion depth (front-rear direction) dimension D2 of the front descending portion 2F should be 58 mm to 70 mm.

Furthermore, according to the above-mentioned "Long-term use parts standards", the external dimensions of the built-in type IH cooking heater (induction heating cooker) are also specified as follows.
(1) The height dimension H2 from the bottom edge of the top plate to the bottom edge of the front panel must be 215 mm to 223 mm.

The heating cooker 1 of the present invention is designed so as to satisfy various conditions as described above.
In FIG. 4, A1 is the longitudinal dimension of the top plate 15, which will be described later, and is 510 mm. A2 is the maximum longitudinal dimension from the front surface of the front cover 112 covering the front surface of the main body 110 to the rear end of the main body 110, which is 498 mm. A3 is the longitudinal dimension from the inclined portion 111 formed in the rear portion of the main body 110 to the front surface of the front cover 112, and is 451 mm.

In FIG. 4, 113 is a heating chamber, which will be described later, and is formed inside the lower unit 200 . The front surface of the heating chamber 113 is formed with an opening 113A (see FIG. 10) through which cooking utensils such as frying pans and objects to be cooked can be put in and taken out. The opening 113A is covered with a door 114 (see FIG. 10) so that it can be opened and closed.

The front surface of the door 114 and the front surface of the front cover 112 are designed to be flush with each other. The door 114 is rotated on the main body 110 by a hinge 176 (not shown) and an arm 116 (not shown) so that the front surface of the door 114 is flush with the front surface of the front cover 112 except for the handle portion 115 . movably supported.

In FIG. 4 , H1 is the maximum height dimension of the heating cooker 1 . That is, the dimension from the upper surface of the top plate 15 to the bottom surface of the lower unit 200 is 227 mm.

In FIG. 4, H2 is the height dimension from the lower end of the top plate 15 to the lower end of the front cover 112, and is 215 mm to 223 mm. H3 is the dimension from the top end to the bottom end of the front cover 112 or the door 114, and is set to 171 mm. H4 is the height dimension of the top plate 15 and is 11 mm.

Next, the configuration of the heating cooker 1 of Embodiment 1 will be described in detail with reference to FIGS. 7 to 17. FIG.
FIG. 6 is a plan view of the heating cooker 1. FIG. FIG. 7 is a longitudinal sectional view of the heating cooker 1 taken along line ZZ in FIG. FIG. 8 is a vertical cross-sectional view of the heating cooker 1 taken along line ZZ in FIG. 6 and showing the flow of the cooling air. FIG. 9 is a longitudinal sectional view of the heating cooker 1 taken along line WW in FIG. FIG. 10 is a longitudinal sectional view of the heating cooker 1 taken along line YY in FIG. FIG. 11 is a longitudinal sectional view of the heating cooker 1 taken along line VV in FIG. FIG. 12 is a longitudinal sectional view of the heating cooker 1 taken along line XX of FIG. FIG. 13 is a simplified plan view for explaining the operating portion of the upper unit of the cooking device 1. FIG. FIG. 14 is a simplified cross-sectional view showing the flow of cooling air inside the upper unit 100 of the heating cooker 1. FIG. FIG. 15 is a block diagram showing main control-related parts of the heating cooker 1. As shown in FIG. FIG. 16 is an explanatory diagram showing main cooling air passages of the induction heating cooker of FIG. 17 is a circuit diagram showing details of an inverter circuit of the induction heating cooker of FIG. 1. FIG.

(Upper unit 100)
In this Embodiment 1, the upper unit 100 alone functions as the heating cooker 1 . Therefore, commercial (AC) power 99 is supplied only to the upper unit 100 . However, a power cord 106 (not shown) for direct connection to the commercial power source 99 via a plug 106A (not shown) is pulled out of the heating cooker 1 from the lower unit 200 .

The upper unit 100 includes a box-shaped upper case (upper case) 16 forming an outer shell, and a metal frame-shaped reinforcing plate (support frame) 22 fixed to the upper part of the upper case (see FIG. 7). and a top plate 15 made of heat-resistant tempered glass or crystallized glass attached to the upper surface of the reinforcing plate 22 so as to cover substantially the entire upper surface of the reinforcing plate 22 .

The upper case 16 is formed by pressing a thin metal plate such as a galvanized steel plate. Alternatively, it is formed by joining a plurality of thin metal plates by spot welding, screws, or the like. In the first embodiment, as will be described later, a sheet of metal sheet is bent to integrally form a bottom wall (bottom surface) 16S, a rear wall 16B, a front vertical wall 16F, and side vertical walls 16L and 16R. there is

The upper case 16 may be formed in another form. For example, only three portions of a bottom wall (bottom surface) 16S, a rear wall 16B and a front vertical wall 16F are formed by pressing a single metal plate. Separately formed two side vertical walls 16L, 16R, one rear wall 16B and one front vertical wall 16F are attached later by screws, spot welding, etc., and finally a box shape with an open top surface is obtained. shape.

The top plate 15 is formed in a flat plate shape with a substantially uniform overall thickness, and the entire lower surface thereof is covered with a painted surface that does not transmit visible light. Therefore, from above the top plate 15, the functional parts below it, such as the IH coils 17L and 17R, cannot be visually recognized.

The IH coil 17R has a doughnut-like planar shape. And the maximum heating power of this IH coil 17R is 3200W. The maximum outer dimension (diameter) is 168 mm.

The other IH coil 17L also has a donut-like shape. The maximum thermal power of this IH coil 17L is 3200W. The maximum outer dimension (diameter) is 168 mm. In addition, you may expand to about 180 mm so that it can respond to to-be-heated objects, such as a large pot and a frying pan.

Reference numeral 18 denotes a laterally long opening formed in the rear portion of the upper case 16 (see FIG. 7), and 19 is an exhaust cover installed above this opening. A hole is formed. 20 is an exhaust port formed between the exhaust cover 19 and the opening 18 .

A metal reinforcing plate 22 is fixed to the rear upper end portion of the upper case 16 . The reinforcing plate 22 has a length equivalent to the lateral width of the rear edge of the upper case 16 . A decorative frame 21 is fixed to the upper surface of the reinforcing plate 22 and formed longer than the width of the upper case 16 . In other words, when viewed from above, the rear and left and right sides of the exhaust cover 19 appear to be surrounded in series (see FIG. 6).

Reference numeral 25 denotes a metal decorative frame which, as shown in FIG. 6, is installed so as to protect the left and right end faces and the front end face of the top plate 15 from external shocks.
Reference numeral 26 denotes an annular cushioning member made of a highly elastic material such as silicone rubber, which is attached to the entire bottom surface of the decorative frames 21 and 25 . Thereby, the upper unit 100 is placed on the kitchen furniture 2 via the cushion material 26 . The top plate 15 may be designed so that one decorative frame 25 surrounds three parts (sides) of the left and right end faces and the front end face or four parts (four sides) including the rear end face.

In FIGS. 6 and 13, 30, 31L and 31R are display units, respectively. A central display portion 30 is installed in front of the top plate 15 and below the central portion in the left and right direction. 31L is a left display portion and 31R is a right display portion. These left and right display portions 31L and 31R are also installed below the front left side and right side of the top plate 15, respectively.

The display units 30, 31L, and 31R are mainly composed of liquid crystal display screens (not shown). It is installed on the operation board 41 . The lower surface of the top plate 15 is not provided with a painted surface that blocks visible rays as described above, corresponding to the positions directly above the display portions 30, 31L, and 31R. Therefore, the display contents of the display portions 30 , 31 L, and 31 R can be visually recognized from above the top plate 15 .

The central display section 30 displays common information and alarms of the heating cooker 1 . For example, information indicating the selection of the three types of heating sources of the heating cooker 1 and the operating state is displayed.

The left display section 31L displays information and alarms regarding the operation of the left IH coil 17L. Similarly, the right display section 31R displays information about the operation and alarm of the right IH coil 17R.

In FIG. 13, 40 is an input operation unit. The input operation unit 40 is arranged long in the horizontal direction along the front edge of the top plate 15 behind the frontmost portion of the decorative frame 25 .
The input operation unit 40 is arranged on the upper surface of an operation board 41 which is horizontally elongated and arranged in a strip shape.

On the operation board 41, various electronic components, an integrated control device MC that controls the overall control of the heating cooker 1, a control device 90, and the like are mounted. This input operation unit 40 will be described later in detail. The operation board 41 is made of a plastic material with high electrical insulation.

Below the operation board 41, a flat auxiliary support plate (illustrated) is installed so as to face the operation board 41 with a gap therebetween. In other words, it has a two-layer (two-layer) structure facing each other with a space between them, so that as many electric parts and circuits as possible can be mounted.

F2 is a second air passage through which cooling air flows from a second cooling fan 61, which will be described later, and is formed by a space between a cover 70, which will be described later, and the front vertical wall 16F in front of the upper case 16. (See FIGS. 7 and 14).

In FIG. 7, 16B is the rear vertical wall of the upper case 16. As shown in FIG. A lower case 101 and an upper case 16, which will be described later, are integrated with screws 51 at a plurality of locations.

As is clear from FIG. 7, the rear vertical wall 16B of the upper case 16 and the lower case 101 closely face each other within a range of about 20 mm to 30 mm, and the facing portions are fixed by the screws 51. .

In FIG. 7, 104 is a cavity with a large depth and a large planar area. This cavity 104 is a space from the lower surface of the bottom wall (bottom surface) 16S of the upper case 16 to the upper surface of the bottom plate 101U at the rear of the lower unit 200, which will be described later. BH indicates the depth (vertical) dimension of the cavity 104 .

As is clear from the structure shown in FIG. 7, the first embodiment has a flat upper case 16 whose upper opening is closed by the top plate 15. This upper case 16 will be described later. When placed on the lower case 101 , the bottom wall 16</b>S of the upper case 16 also serves as the ceiling surface of the lower case 101 .

As described with reference to FIG. 7, the cavity 104 is the space where the bottom wall 16S of the upper case 16 and the bottom plate 101U of the lower case 101 face each other at the largest distance.
In the cavity 104 , a waveguide 123 forming part of a microwave heating device 120 to be described later is arranged long in the left-right direction behind the heating chamber 113 .
Furthermore, behind the waveguide 123, a housing case C154 for the power supply circuit board 127, on which circuit components for supplying power to the microwave heating control unit 130 are mounted, is arranged long in the left-right direction.

The microwave heating control unit 130 is mainly composed of a microcomputer and is mounted on the power supply circuit board 127 inside the case C154. In other words, the power supply circuit board 127 housed inside the case C also serves as a control board on which the microwave heating control section 130 is mounted. Although the control board and the power supply circuit board 127 may be provided separately, they are integrated in consideration of the installation space in the first embodiment.

In FIG. 7, 101T is a front horizontal wall made of a metal plate provided on the front side of the lower case 101 . The front horizontal wall 101T is formed by bending the upper end of the front plate 101F of the lower case 101 backward.

Reference numeral 198 denotes a connecting support fitting made of a metal plate, and has a horizontal portion 198H and a vertical portion 198V. The horizontal portion 198H is fixed to the front horizontal wall 101T of the lower case 101. As shown in FIG.

The vertical portion of the support bracket 198 and the front vertical wall 16F of the upper case 16 face each other closely over a range of about 20 mm to 39 mm, and the facing portions are fixed by screws 51F (not shown). there is 8, 9 and 10 do not show the screw 51F.

Even if one or both of the upper case 16 and the lower case 101 are box-shaped and are formed of thin metal plates, the upper case 16 and the lower case 101 can be firmly connected by fastening the screws 51 and 51F. It becomes two box-shaped structures. In other words, since the outer dimensions of the box-shaped upper case 16 are slightly smaller than the inner dimensions of the lower case 101, the upper case 16 fits into the lower case 101 within a range (depth) of about 20 mm to 30 mm. are in agreement. Note that other fastening means such as bolts and nuts may be used instead of the screws 51 and 51F.

Even if the upper case 16 and the lower case 101 are made of a thin metal plate so as to be light, they form a single rigid box-shaped structure. beneficial to

In particular, since the top plate 15 of the upper unit 100 is supported by the upper surface of the kitchen furniture 2 and receives the full load of the lower unit 200, the upper case 16 and the lower case 101 as a whole should not be distorted or deformed. is important. Since the cushions 26 are attached to the entire lower surfaces of the decorative frames 21 and 25, it is the cushion material 26 that actually contacts the upper surface of the kitchen lower part 2. As shown in FIG.

In FIG. 7, 80 is an inverter circuit board, which is installed in the central portion of the upper case 16 . The inverter circuit board 80 has a rectangular planar shape elongated in the horizontal direction.

The inverter circuit 81 mounted on the inverter circuit board 80 includes an inverter circuit 81L that supplies high-frequency power to the left IH coil 17L and an inverter circuit that supplies high-frequency power to the right IH coil 17R. and a circuit 81R. These will be described later with reference to FIG.

A total of four aluminum heat sinks (radiation sinks) 82 are attached to the upper surface of the inverter circuit board 80 . As shown in FIG. 7, the heat sinks 82 are arranged in two rows so that the two radiating fins 82F face each other and are placed close to each other so as to face each other.

As can be seen from FIG. 7, the heat sink (radiation sink) 82 has power control switching elements forming part of the inverter circuits 81L and 81R on the inclined surface opposite to the side facing each other. 83 is installed. Therefore, the heat generated during operation of the electronic component 83 can be cooled by the cooling air passing around the radiation fins 82F.

The power control switching element 83 is, for example, an IGBT (insulated gate bipolar transistor). The power control switching elements 83 on the one inverter circuit 81L side are located behind the heat sinks 82 arranged in front and rear two rows, and the power control switching elements 83 on the other inverter circuit 81R side are located in front of the heat sinks 82 arranged in front and rear two rows. attached to the side. In addition, you may make it attach to this opposite side.

In FIG. 7, 70 is a cover made of a thin metal plate or a plastic material that covers the entire top of the inverter circuit board 80 . Both left and right ends of the cover 70 are open, and as shown in FIG. 14, the left end face of the cover 70 serves as an inlet FI for the cooling air RF1 described later, and the right end face of the cover 70 serves as an outlet FO for the cooling air RF1. Configure.

The cover 70 is positioned to secure a constant gap from the lowermost surfaces of the IH coils 17L and 17R, and is sized to secure a constant gap from the uppermost surface of the heat sink 82 as well.

Since the cover 70 is directly below and close to the IH coil 17L, if the cover 70 is expected to have a magnetic shielding effect, the cover should be made of a metal such as aluminum, and the upper case 16 is even better. For example, a screw (not shown) for attaching the cover 70 may directly reach the screw hole of the cover 70 . Since the upper case 16 is connected to the lower case 101, which will be described later, with metal screws or the like, it is also electrically connected to a ground terminal (not shown) provided on the lower case 101, and noise is absorbed by the ground. be. By doing so, the magnetic shielding effect of the cover 70 can be expected to provide a noise shielding effect for various electrical components mounted on the inverter circuit board 80 .

Also, if the cover 70 is injection molded from a plastic material, the cross-sectional shape of the cover 70 can be relatively freely determined. Therefore, there is an advantage that the flow (direction) of the cooling air RF1 flowing through the first air passage F1 can be adjusted. For example, a rib-like wind direction plate or the like may be integrally formed so that a large amount of cooling air RF1 flows particularly to a specific portion of the heat sink 82 .

The IH coils 17L and 17R are supported from below by an electrically insulating and heat-resistant component called a coil base 17C (not shown) so that the distance between the IH coils 17L and 17R and the top plate 15 is the same. Description is omitted. Thus, the IH coils 17L, 17R are on one horizontal line (second horizontal line HL2). In other words, it exists on one plane (second horizontal plane HL2) defined by the second horizontal line (see FIG. 9).

The cover 70 is in a position where it is not in contact with both the coil bases arranged below the IH coils 17L and 17R and the heat sink 82 .

The cover 70 is fixed so as to be in close contact with the upper surface of a flat support plate 71 larger than the planar shape of the cover 70 . Between the inverter circuit board 80 and the cover 70, as shown in FIGS. 7 and 14, a first air passage F1 that is long in the horizontal direction is defined. Note that the support plate 71 is made of an insulating material.

7 and 10, 102 is a metal exhaust duct through which the exhaust flow from the lower unit 200 is guided. An end portion 102E on the exhaust port side of the exhaust duct 102 passes through a gap GP1 formed between a later-described partition plate 52 and a rear vertical wall 16B of the upper case 16. As shown in FIG.

In FIG. 9, 16A is a horizontal flange formed by bending the upper end portions of the side vertical walls 16L and 16R of the upper case 16 outward at a right angle.
A horizontal flange 101A is formed by bending the upper ends of the side vertical walls 101L and 101R of the lower case 101, which will be described later, to the outside at a right angle.

In the upper case 16 and the lower case 101, the flange 16A described above overlaps the flange 101A. In this overlapping state, the side wall surface of the upper case 16 and the side wall surface of the lower case 101 are fixed with screws (not shown). Therefore, the upper case 16 and the lower case 101 form a strong integral structure by fixing with the screw 51 and closely fixing the flange 16A and the flange 101A. In other words, the total weight of the upper case 16 is supported by the upper surface of the flange 101A of the lower case 101, so even if the upper case 16 and the lower case 101 are made of a thin metal plate, they are still integrated. can be made into a box-shaped structure with mechanical strength.

The connection between the flange 16A and the flange 101A may be other fastening means such as bolts and nuts instead of screws. The flange 16A and the flange 101A do not contact the upper surface of the kitchen furniture 2. As shown in FIG. Since these flanges 16A and 101A are made of a hard material (metal), there is a concern that they may damage the kitchen furniture 2. Further, if the flange 16A and the flange 101A come into contact with the kitchen furniture 2, the cushioning material 26 cannot be installed while being compressed. If the cushion material 26 is not in a tight contact state, there is a concern that the effect of preventing water or the like from entering may be impaired.

As shown in FIG. 14, a first cooling fan 60 and a second cooling fan 61 are installed near the left side vertical wall 16L of the upper case 16, respectively. Rotation shafts (not shown) at the center of the rotor blades (not shown) of the first cooling fan 60 and the second cooling fan 61 extend vertically. It rotates on one horizontal plane (first horizontal plane HP1).

A centrifugal fan (blower) is employed for the first cooling fan 60 and the second cooling fan 61 . This is because static pressure is high and air resistance is high in a space with high mounting density. In general, there is a type of centrifugal fan that has a single suction port and blows out (discharges) in all radial directions. However, Embodiment 1 is of a type having only one blowing direction.

60A is an outlet formed integrally with the fan case 60C of the first cooling fan 60, and 61A is an outlet formed integrally with the fan case 61C of the second cooling fan 61. FIG. The outlet 60A is directed toward the inverter circuit board 80. As shown in FIG. Also, the outlet 61A is directed toward the holder 42 below the operation board 41. As shown in FIG. In other words, the two outlets 60A and 61A both exist on a common horizontal plane (HP1) and are oriented rightward. This horizontal plane HP1 is a first horizontal plane which will be described later.

The holder 42 is made of an insulating material such as a plastic material. The holder 42 has a size corresponding to the entire area of the input operation section 40 and the areas of the central display section 30, the right display section 31R, and the left display section 31L, and is elongated in the left-right direction in a strip shape.

The first cooling fan 60 and the second cooling fan 61 have exactly the same structure, the same shape, and the same "rated specifications". There are cases where the air flow rate is changed. For example, when increasing the driving power applied to the IH coils 17L and 17R to increase the heating capacity, or when it is detected that the temperature of the central display unit 30 or the input operation unit 40 is higher than normal, In some cases, the number of revolutions is increased to increase the air flow rate in order to increase the cooling effect.

Rated specifications include, for example, rated voltage, working voltage range, rated current, rated rotation speed, maximum air volume, maximum static pressure, sound pressure level, and the like. By changing the applied voltage or voltage application time (on-duty time) within the working voltage range, the number of revolutions can be changed.
In contrast, in Embodiment 1, a PWM control (Pulse Width Modulation) method is adopted, and the pulse width duty cycle (pulse width The ratio of H and L) is changed to control the motor of the first cooling fan 60 . This PWM control is also employed in the second cooling fan 61 .

The first cooling fan 60 and the second cooling fan 61 have fan cases 60C and 61C surrounding rotating blades (not shown). not shown).

Directly below the suction ports (not shown) of the first cooling fan 60 and the second cooling fan 61 are ventilation holes 64 (Fig. 9). This vent hole 64 is formed in the bottom wall surface of the lower case 16 . This vent hole 64 communicates with a vent hole 164 formed in the left side wall surface of the lower case 101, which will be described later. Therefore, the first cooling fan 60 and the second cooling fan 61 can introduce outside air through the ventilation holes 164 thereof.

In FIG. 9, reference numeral 165 denotes a recess (air intake duct), which is provided to directly communicate the vent hole 64 with the vent hole 164 of the lower case 101 . This recess 165 is formed by recessing from the left side by a certain depth (dimension) DP1. Note that this dimension DP1 is 99 mm.

As shown in FIG. 9, the vertical center point of the blowout port 60A of the first cooling fan 60, the vertical center point of the heat sink 82, and the electrical components mounted on the upper surface of the power supply circuit board 55 to be described later. The vertical center point of 85 is located on one horizontal line HL1. In other words, the positional relationship is such that the cooling air RF1 blown out from the outlet 60A of the first cooling fan 60 reaches the heat sink 82 and the electrical component 85 when traveling straight to the right. A horizontal plane defined by this horizontal line HL1 is hereinafter referred to as a "first horizontal plane" HP1.

AC power from a commercial AC power supply 99 is supplied to the power circuit board 55 through a filter circuit board 54 which will be described later. Then, the power circuit board 55 converts alternating current into direct current. Therefore, electric parts 85 such as a diode and a transformer 57 (not shown) for converting AC to DC are mounted.

When the temperature of the heat sink 82 of the inverter circuit board 80 rises abnormally, the control device 90 that controls induction cooking reduces the amount of heating of the IH coils 17L and 17R. In addition to this operation, the amount of air blown by the first cooling fan 60 per unit time may be temporarily increased. The temperature of the heat sink 82 is detected by contact-type temperature sensors TS8 and TS9 such as thermistors.

If the first cooling fan 60 and the second cooling fan 61 have exactly the same structure, the same shape, and the same rated specifications, the procurement cost at the time of manufacturing can be reduced. If cooling fans of the same specifications are arranged in parallel and operated, there is a high possibility that beat noise will be generated. I am doing the control that becomes.

In FIG. 14, reference numeral 52 denotes a metal partition plate elongated in the left-right direction at the rear portion of the upper case 16 and fixed to the upper case 16 . The partition plate 52 is a wall extending vertically so as to partition the internal space of the upper case 16 into the front and rear. It should be noted that the term "dividing" as used herein does not mean strict shielding such as complete blocking of air circulation. It is sufficient that the rearward flow of the cooling air from the first cooling fan 60 and the second cooling fan 61 over the upper end surface of the partition plate 52 can be suppressed to some extent.

In FIG. 14, 52A is an exhaust window formed in the left half of the partition plate 52, 53 is an exhaust port plate installed so as to cover the front side of the exhaust window 52A, and has a large number of through holes 53A. , the cooling air directed to the exhaust window 52A of the partition plate 52 passes through. The cooling air that has passed through the exhaust window 52A is discharged to the external space of the heating cooker 1 through the exhaust cover 19. As shown in FIG.

In FIG. 14, LF is the exhaust port dimension indicating the range (width dimension) of the exhaust exhausted from the installation space CK of the IH coils 17L and 17R. The size of the exhaust port is determined by the formation range of the through hole 53A and the width dimension of the exhaust window 52. As shown in FIG. If the width of the exhaust window 52 is narrower than the formation range of the through hole 53A (the form shown in FIG. 14), the width of the exhaust window 52 determines the exhaust range LF.

In FIG. 14, 54 is a filter circuit board arranged at the rear right corner of the upper case 16 . In this filter circuit board, the noise in the power supply from the commercial power supply 99 is removed and supplied to the output terminal side, and conversely, the noise is prevented from flowing out (reverse) to the commercial power supply side on the input terminal side. It contains electrical components (not shown) such as resistors, inductors (choke coils), line-to-line capacitors, relays, and current fuses. The end of a power cable (not shown) connected to the commercial power source 99 via a plug is connected to the filter circuit board 54 via the inside of the lower unit 200, which will be described later.

The power circuit board 55 is located on the opposite side of the first cooling fan 60 with the inverter circuit board 80 interposed therebetween. In other words, since the power supply circuit board 55 is located on the right side of the outlet FO of the first air passage F1 formed between the inverter circuit board 80 and the cover 70, cooling immediately after exiting the first air passage F1 Cooled by the wind.

In FIG. 14, CL3 is a center line passing through the center point of the left IH coil 17L in the longitudinal direction, and CL4 is a center line passing through the center point of the right IH coil 17R in the longitudinal direction.
CL5 is a center line that crosses the center points of the two IH coils 17L and 17R in the horizontal direction. CL2 is a center line passing through the center of rotation of each rotor blade (not shown) in the first cooling fan 60 and the second cooling fan 61 in the front-rear direction. As is clear from FIG. 14, the first cooling fan 60 and the second cooling fan 61 are arranged in a straight line in the front-rear direction.

In FIG. 14, RF1 indicates the cooling air blown out from the first cooling fan 60. In FIG. RF2 indicates the cooling air blown from the second cooling fan 61 .

RF3 indicates the cooling air after exiting from the outlet FO of the first air passage F1. Further, RF4 indicates the cooling air after passing through the second air passage F2. Part of the cooling air RF3 after exiting from the outlet FO and the cooling air RF4 after passing through the second air passage F2 merge in the middle. That is, part of the cooling air RF1 and the cooling air RF2 join before reaching the through hole 53A of the exhaust port plate 53 .

14, GP1 is a gap formed between the partition plate 52 and the rear vertical wall 16B of the upper case 16. In FIG. The width of the gap GP1 in the front-rear direction is about 30 mm to 50 mm.

Next, returning to FIG. 13, the input operation unit 40 will be described.
In FIG. 13, reference numeral 40 denotes an input operation portion formed on the upper surface of the front side of the top plate 15. As described below, input is performed using a change in capacitance when the user touches lightly with a finger or the like. Various input keys that can be used are arranged in a straight line in the horizontal direction.

The input operation section 40 includes a right operation section 40R, a central operation section 40M and a left operation section 40L. Reference numeral 98 denotes an operation button or operation key (touch input type) of a main power switch 97 capable of supplying and shutting off commercial power 99 to integrated control device MC, which will be described later.

The main power switch 97 is attached to the filter substrate 54 of the upper unit 100 as shown in FIGS. The commercial power source 99 is supplied to the power circuit board 55, the inverter circuit 81, and the power circuit portion of the lower unit 200 (not shown in FIG. 15).

Two touch input keys 43R are arranged on the right operation section 40R. One or more input functions are assigned to these input keys 43R. For example, the thermal power (power consumption) at the time of induction heating, the induction heating time, the induction heating pattern, and the like. The right operation unit 40R is for commanding start and stop of the operation of the right IH coil 17R and other energization conditions (time, thermal power, etc.).

44R is a touch input key for selecting a "control menu" for heat cooking, and one of a plurality of control menus can be selected each time the touch operation is performed. The "control menu" is a control mode such as boiling water, boiling, frying (automatic cooking), etc., as shown in FIG.

45R is a touch input key that can command the start and stop of the operation of the right IH coil 17R. When the heating power (power consumption) of the IH coil 17R, the induction heating time, or the control mode (see FIG. 19) is selected, any one of the input keys 43R or 44R will confirm the heating conditions. , automatically switches to an input key that can command the start of the induction heating operation. However, the input key 45R may always be used to start and stop the heating operation without switching the function of the input key.

Two touch input keys 43L are arranged on the left operation unit 40L. One or more input functions are assigned to these input keys 43L. For example, the thermal power (power consumption) at the time of induction heating, the induction heating time, the induction heating control mode, and the like. The left operation unit 43L is for commanding start and stop of the operation of the left IH coil 17L and other energization conditions (time, thermal power, etc.).

44L is a touch input key for selecting a control menu for heat cooking, and one can be selected from a plurality of "control menus" each time a touch operation is performed. The "control menu" is, as shown in FIG. 19, control modes such as boiling, stewing, and frying (automatic cooking).

45L is a touch input key that can command the start and stop of the operation of the left IH coil 17L. When the heating power (power consumption) of the IH coil 17L, the induction heating time, the control mode, etc., is selected, any one of the input keys 43L or 44L is used to determine the heating conditions, and the induction heating operation is performed. automatically switches to an input key that can command the start of However, the input key 45L may always be used to start and stop the heating operation without switching the function of the input key.

Two touch input keys 43M are arranged on the central operation unit 40M. One or more input functions are assigned to these input keys 43M. For example, the heating power (power consumption) during microwave heating, the heating time, the heating pattern, and the like. This central operation unit 40M is for commanding start and stop of both microwave heating and electric radiation heating in the lower unit 200, and other energization conditions (time, thermal power, etc.).

44M is a touch input key for selecting a “control menu” for microwave heating using the heating chamber 113 and oven heating cooking. This input key 44M can select one of a plurality of control menus each time it is touched. The "control menu" referred to here is, for example, control modes such as warming, stewing, grilling (automatic cooking), grilling (manual cooking), and defrosting. For example, if grilled food (manual cooking) is selected, a hamburger or the like can be heated for an arbitrary time (either microwave or electric radiation heat, or both at the same time).

When the output of the microwave, the heating power (power consumption) of the electric radiation heating, the heating time, the heating pattern, etc. are selected, any one of the input keys 43M or 44M is used to confirm the heating conditions, and the heating is performed. It automatically switches to an input key that can command the start of an action.

Further, 45M is a touch input key for instructing start and stop of microwave heating and oven heating using the heating chamber 113 . Before cooking with the induction heating source 17, the user first presses the operation button (input key) 98 of the main power switch 97 to turn on the main power, and then presses the input key 45M. In this case, the integrated controller MC, which will be described later, determines that one or both of microwave heating and oven heating are performed, and displays necessary information on the central display unit 30 .

If the input key 45M is pressed immediately after starting at least one of microwave heating and electric radiation heating, the heating operation is immediately stopped.

Each of the input keys 43L, 43M, 43R, 44L, 44M, and 44R has a function of displaying the input function after switching with characters or symbols within the range of the key when the input function is switched. Therefore, the user's operation error is prevented.

In FIG. 13, 47 is a touch-type input key for Internet connection command requesting wireless communication from the integrated control device MC. 46L and 46R are windows for transmitting an infrared signal as a command signal for starting operation to a ventilator (not shown) installed outside. An infrared transmission unit 48 is installed below this window.

A radio communication unit (communication module) 49 includes an antenna (not shown) for receiving radio waves from the outside and for transmitting radio waves to the outside, and a transmitting/receiving circuit (not shown). The wireless communication unit 49 is placed below the right end of the display substrate 41 with a small distance from the bottom surface of the upper case 16 .

In FIG. 13 , CL1 denotes a center line passing through the left and right center points of the upper unit 100 in the front-rear direction, and AL denotes a range where the top plate 15 is exposed on the upper surface of the upper unit 100 .

Next, control means of the upper unit 100 will be described with reference to FIG.
In this figure, description of a part of the configuration is omitted, and the filter circuit of the filter circuit board 54 is not illustrated.

A main power switch 97 is opened and closed by the user, and is connected to a 200 V commercial power source 99 via a power cord and a power plug (not shown). Reference numeral 91 denotes a power supply circuit to which electrical energy is supplied via the main power switch 97, and 92 denotes a DC power conversion section for converting AC power from a commercial power supply into DC. This power supply circuit 91 is mounted on the power supply circuit board 55 .

MC is an integrated control device and has the function of a main controller or a host computer. It is a control device composed mainly of a microcomputer. A predetermined constant-voltage current is supplied from the power supply circuit 91 to the integrated control device MC. The integrated control device MC is mounted on the back (lower) surface of the operation board 41 (see FIG. 14).

The integrated control device MC is composed of four parts: an input part, an output part, a storage part, and a CPU (arithmetic control part). (stored). In addition to the storage unit (ROM, RAM) of the microcomputer, a large-capacity storage device (main memory) MM for recording abnormality monitoring information is incorporated.

Reference numeral 90 denotes a control device for controlling induction heating, which is mainly composed of a microcomputer. The control device 90 prestores (stores) power supply control programs corresponding to various cooking menus for induction heating. It also incorporates a storage device (not shown) for recording abnormality monitoring information.

A second control device 90A (not shown) may be responsible for part of the functions of this control device 90. FIG. For example, a microcomputer may be mounted on the inverter circuit board 80 to control the inputs and outputs of the inverter circuits 81L and 81R.

During all heat cooking operations such as induction heating cooking and microwave heating cooking, the presence or absence of an electrical abnormality is centrally monitored by the integrated controller MC.

Reference numeral 96 denotes a clock circuit also called a real-time clock, which is supplied with power from a dedicated power supply (built-in battery) BT1 separate from the power supply circuit 91 connected to the main power switch 97, and is driven for a long period of time. It has become so. For example, this may be a radio-controlled clock, and if requested by the integrated control device MC, it always informs the current date and exact time in seconds. there is Therefore, even if the main power supply of the heating cooker 1 is turned off and then turned on again, the time information of this clock circuit is not affected, and there is a function to always transmit the latest correct time to the integrated control device MC. For this reason, the abnormality monitoring information recorded in the storage device MM of the integrated control device MC is always recorded and saved at the correct time.

In FIG. 15, 72 is a power control unit (also called a "demand control unit"). This power control unit 72 analyzes a command signal for induction heating or microwave heating by the integrated control device MC, and the total power consumption of the heating cooker 1 exceeds the specified value or the upper limit set individually by the user. There is a function to monitor so that it does not exceed, and a function to automatically limit the heating power during induction heating and microwave heating so that the total power consumption does not exceed a specified value or an arbitrary set value.

In general, "demand control device" or "demand control device" refers to a device that controls the value of demand (demand power), automatically checks the power usage status, and if it is likely to exceed the set value , if you notify with an alarm, etc., and set the automatic stop of the equipment that can be stopped, the equipment itself will automatically stop the electrical equipment that can be stopped as determined, and after a certain period of time, the electricity will stop It is known as a device that automatically restarts equipment, and is said to be very effective in managing power contracts with electric power companies in each household.

The power control unit 72 of Embodiment 1 is provided to allow the heating cooker 1 itself to have the function of suppressing power consumption as described above. The power control unit 72 may be provided as a control function in the integrated control device MC without providing special hardware. Anything added later can be implemented.

The power control unit 72 of Embodiment 1 can set the maximum power consumption of the heating cooker 1 as a whole to only one of three levels (5800 W, 4800 W, 4000 W). It should be noted that this setting can be made in the input operation section 40 while looking at the above-mentioned three levels of numerical values displayed on the central display section 30 when a plurality of specific keys in the input operation section 40 are pressed at the same time. . Such a simple setting method is introduced in Japanese Patent No. 6012780, for example.

A signal transmission unit 73 is provided to transmit various control signals between the upper unit 100 and the lower unit 200 . For example, it corresponds to a signal line and a connector that can transmit a signal by wire. Also, for example, an infrared communication unit may be used so that signals can be exchanged wirelessly. The signal transmission unit 73 is also provided between the integrated control device MC and the control device 90 .

Reference numeral 84 denotes a vibration sensing device that senses shaking at the time of an earthquake, and when it senses a seismic intensity (acceleration) equal to or greater than a predetermined seismic intensity, it sends a vibration sensing signal to the integrated control unit MC, which receives the signal. It is determined that an earthquake has occurred, and the power supply to all heating means in use is cut off instantly.

The control device 90 obtains temperature information from the temperature detection circuit 93 and monitors whether or not the main parts of the upper unit 100 have an abnormally high temperature. For example, the central display unit 30 is composed of a liquid crystal display substrate, but is relatively vulnerable to heat.

When the measured temperature exceeds the predetermined temperature, it is determined by the control device 90 as an "abnormal preliminary state" (the abnormal preliminary state is limited to when the detected temperature is in the range of 60° C. to 65° C.). If the temperature exceeds 65° C., the danger increases and the controller 90 recognizes it as a true abnormal condition).

In this abnormal preliminary state, the induction heating operation is not stopped immediately, and the blowing capacity of the motor 61M of the second cooling fan 61 cooling the IH coil installation space CK of the upper unit 100 is improved. However, when the temperature exceeds 65° C., it is determined by the controller 90 to be in an abnormal state, and the induction heating operation is immediately stopped. Specifically, for example, when the IH coil being driven is the right IH coil 17R, the power supply to the inverter circuit 81R supplying high-frequency power to the IH coil 17R is cut off. Then, the operation of the induction heating circuit 94R including the IH coil 17R, resonance capacitor, etc. is stopped. 94L is an induction heating circuit for the left IH coil 17L.

Then, at least during the period from such an emergency preliminary state to an emergency stop, the state of electrical and physical changes in the main portions during induction heating (the temperature of the central display section 30 described above as an example) is indicated (abnormality monitoring). Information is stored in the memory device 90R of the controller 90. FIG.

In addition, in the abnormal preliminary state described above, the induction heating operation is not stopped immediately, and the air blowing capacity of the motor 61M of the second cooling fan 61 is not increased (the rotation speed of the rotor blades is not changed), and the IH coil 17L, The fire power of 17R may be improved by forcibly lowering it.

The abnormality monitoring information stored in the storage device of the control device 90 is obtained during the period from the time when the start command is received from the integrated control device MC until the cooking is normally completed. Therefore, the "control menu" (for example, "boiling", "simmering", "deep-frying", etc.) and information on the thermal power of induction heating are also recorded in chronological order. If an emergency stop occurs due to an abnormal condition on the way, the abnormality monitoring information is stored in the storage device 90R until that time.

Furthermore, in this first embodiment, in order to monitor the operation of the heating cooker 1 over a wider range and acquire data, after the main power switch 97 is turned ON, all heating on the upper unit 100 and lower unit 200 sides is performed. The integrated controller MC acquires monitoring information about the cooking state. The integrated control device MC acquires monitoring information on the presence or absence of an abnormality from the heating chamber control unit 159 and the microwave heating control unit 130 via the signal transmission unit 73 .

In the inverter circuit board 80, one inverter circuit 81R dedicated to the right IH coil 17R and one inverter circuit 81L dedicated to the left IH coil 17L are mounted.

These two inverter circuits 81L and 81R are driven by the control device 90 independently of each other. In addition, when these inverter circuits are named generically, the code|symbol "81" is used.

Details of the two inverter circuits 81L and 81R will be described later with reference to FIG.

In FIG. 15, reference numeral 95 denotes a speech synthesizer for synthesizing electronically generated speech, which provides guidance for operations to the user and notification of abnormal occurrences by voice from a speaker 95S each time.

The temperature detection circuit 93 described above is connected to at least seven temperature sensors TS3 to TS9. Specifically, there are temperature sensors TS3 to TS9 for detecting the temperature of the top plate 15, the ambient temperature of the IH coil installation space CK, the temperature of the heat sink 82 of the inverter circuit board 80, the temperature of the central display section 30, etc. . A temperature detection circuit 93 receives temperature detection information from each of the temperature sensors TS3 to TS9 and sends the temperature detection results to the control device 90 .

The temperature sensors TS3 to TS9 may be of a non-contact type such as an infrared sensor or a contact type such as a thermistor, and they are used alone or in combination.

Of the temperature sensors TS3 to TS9, two temperature sensors TS3 and TS5 are non-contact sensors such as infrared sensors, and as shown in FIG. to receive infrared signals from the top plate 15 direction. In other words, it is possible to measure the temperature of the bottom surface of the object to be heated, such as a pot or a pan.

Of the temperature sensors TS3 to TS9, two temperature sensors TS4 and TS6 use thermistors as contact sensors, and as shown in FIG. placed in the cavity. These temperature sensors TS4 and TS6 are in direct contact with the bottom surface of the top plate 15, or are in contact with the bottom surface of the top plate 15 via thermally conductive intervening substances. Thereby, the temperature of the top plate 15 can be measured.

Of the temperature sensors TS3 to TS9, one temperature sensor TS7 (see FIG. 13) uses a thermistor as a contact sensor and is installed on the upper surface of the holder . Then, the ambient temperature of the central display section 30 and the input operation section 40 is detected. The two temperature sensors TS8 and TS9 use thermistors and are attached to the upper surface of the heat sink 82, which will be described later.

At least two temperature sensors TS1 and TS2 are also provided on the lower unit 200 side to detect the internal space temperature of the lower unit 200, the details of which will be described later.

Reference numeral 62 denotes a cooling fan driving circuit, which controls power for driving motors 60M and 61M for driving the first cooling fan 60 and the second cooling fan 61; That is, under the control of the cooling fan drive circuit 62, the blowing capacities of the first cooling fan 60 and the second cooling fan 61 are changed in multiple steps independently of each other.

A display driving circuit 63 can control the operations of the central display 30, the left display 31L, and the right display 31R, and has the function of displaying necessary information.
The display drive circuit 63 may be composed of a dedicated microcomputer. Further, the control program (software) for exhibiting the functions of the display section driving circuit 63 may be incorporated in the integrated control device MC. The display drive circuit 63 is mounted on the upper surface of the operation board 41 (see FIG. 14).

Reference numeral 84 denotes a vibration sensing device that senses shaking at the time of an earthquake, and when it senses a seismic intensity (acceleration) equal to or greater than a predetermined seismic intensity, it sends a vibration sensing signal to the integrated control unit MC, which receives the signal. It is determined that an earthquake has occurred, and the power supply to all heating means in use is cut off instantly.

Reference numeral 49 denotes a wireless communication unit 49, which receives commands from the integrated control unit MC and transmits information. Also, it receives a command from the integrated control device MC and acquires information from the outside.

(Lower unit 200)
Next, the lower unit 200 will be explained.
FIG. 7 is a vertical cross-sectional view of the induction heating cooker of FIG. 1 taken along line ZZ of FIG. FIG. 8 is a vertical cross-sectional view of the induction heating cooker of FIG. 1 taken along line ZZ of FIG. 6 and showing the flow of cooling air. FIG. 9 is a vertical cross-sectional view of the induction heating cooker of FIG. 1 taken along line WW of FIG.

7 to 9, 101 is a lower case (lower housing) that constitutes the outer shell of the main body 110 of the lower unit 200. As shown in FIG. The lower case 101 is formed by pressing a thin metal plate such as a galvanized steel plate, or by joining a plurality of thin metal plates by spot welding or screws. In Embodiment 1, as described below, it is composed of three thin metal plates.

Reference numeral 101H denotes a body portion that constitutes three surfaces of the rear and left and right portions of the lower case 101, and 101U is a flat bottom plate that completely closes the bottom opening of the body portion. 101C is an inclined portion, which is a wall surface that is inclined forward as it goes downward so as not to hit the installation opening 2A of the kitchen furniture 2 when the heating cooker 1 is installed on the kitchen furniture 2 . A front plate 101F constitutes the front surface of the lower case 101 and is a single flat plate as a whole. The front surface of the front plate 101F is brought into close contact with the rear surface of the door 114 so that microwaves do not leak from the gap between the front plate 101F and the door 114.

The lower unit 200 has two independent heating sources. One of them is the microwave heating device 120 and the other is the oven heating device 140 . The oven heating device 140 heats the heating chamber (oven chamber) 113 from the outside, but may heat the heating chamber 113 from the inside.

7, 9 and 10 show the main parts of the microwave heating device 120. FIG.
They are installed in the following order from the front side.
An inverter circuit board 121 (see FIG. 9) on which an inverter circuit 121A (see FIG. 15) is mounted is arranged on the frontmost side.

Behind the inverter circuit board 121, a magnetron 122 serving as a microwave generation source and a waveguide 123 surrounding an oscillator 122A of the magnetron 122 are arranged.

Furthermore, behind the waveguide 123, an antenna case 124 connected to the waveguide 123 and an antenna 125 inside the antenna case are arranged.
A motor 126 for rotating or rotating the antenna 125 during microwave heating is arranged behind the antenna case 124 .

Reference numeral 127 denotes a power circuit board for supplying microwave heating output and electric power to the magnetron 122. A power circuit portion 120P (not shown) receives commercial power from the filter circuit 54, and a microwave heating portion to be described later. 130 are implemented.

7 and 8, reference numeral 128 denotes a third cooling fan, which is arranged directly below a box-shaped case A150 in which the inverter circuit board 121 is accommodated. The case A150 has a shape in which the entire bottom surface is open and there is no bottom surface.
A fourth cooling fan 129 is arranged directly below a box-shaped case B151 on which the heat radiation portion 122H of the magnetron 122 is placed. Several heat radiation fins are formed in parallel in the heat radiation part 122H for the cooling air from the fourth cooling fan 129 to pass through. The case B151 has a shape in which the entire bottom surface is open and there is no bottom surface.

The third cooling fan 128 and the fourth cooling fan 129 are, for example, axial fans. It is supported by the bottom plate 101U of the lower case 101 so that the rotating shaft at the center of the rotating blade is in the vertical (perpendicular) direction.

If the third cooling fan 128 and the fourth cooling fan 129 have exactly the same structure, the same shape, and the same rated specifications, the procurement cost at the time of manufacturing can be reduced. Note that if cooling fans of the same specification are arranged in parallel and operated, there is a high possibility that beats will occur. may do so.

The case A 150 and the case B 151 have an opening on the entire bottom surface as described above, and the third cooling fan 128 and the fourth cooling fan 129 are arranged to lie inside the opening, respectively.

In FIG. 7, the wind direction plates 199 provided in two rows inside the case A150 are integrally or separately formed inside the case A150. The wind direction plate 199 is installed to efficiently flow the cooling air from the third cooling fan 128 to the inverter circuit board 121 and two communication ports 138A and 138B which will be described later.

A reference numeral 152F denotes a front intake port formed in the bottom plate 101U of the lower case 101. As shown in FIG. The air intake is composed of a large number of small circular through-holes or rectangular or oval through-holes. This intake port 152F is for the third cooling fan 128. As shown in FIG.

152B is an intake port on the rear side, which is formed in the bottom plate 101U of the lower case 101. As shown in FIG. The air intake is composed of a large number of small circular through-holes or rectangular or oval through-holes. This intake port 152B is for the fourth cooling fan 129. As shown in FIG.

A duct 153 is installed above the heat radiation portion 122H, and guides the cooling air RF6 from the fourth cooling fan 129 that has passed through the heat radiation portion 122H to the downstream side as shown in FIG.

A case C 154 accommodates the power supply circuit board 127 and the microwave heating controller 130 in a sealed state. This case 154 is made of a plastic material that is highly electrically insulating.
The case C154 is configured by overlapping two members, a lid 154A on the rear side and a main body 154B in the shape of a container or box on the front side. A large opening formed in the front side of the main body 154B is closed by the lid 154A.

The case C154 has a main body 154 on the front side, to which a power supply circuit board 127 and a board (not shown) on which a microwave heating control section 130 is mounted. At the time of maintenance and inspection, the lid 154A is opened so that various inspections and repairs of the power supply circuit board 127 and the microwave heating control section 130 can be performed.

The case C154 is installed as far away from the back surface of the heating chamber 113 as possible so as not to be affected by the heat from the heating chamber 113 . It is also installed away from the bottom plate 101U, so that even if liquid such as water or cooking liquid enters the inside of the lower case 101 from the upper unit 100 side, the electrical insulation will not be impaired. ing.

As described with reference to FIG. 7, the cavity 104 is the space where the bottom wall 16S of the upper case 16 and the bottom plate 101U of the lower case 101 face each other at the largest distance.
In the cavity 104, a waveguide 123 constituting part of a microwave heating device 120, which will be described later, is arranged long in the left-right direction behind the heating chamber 113, and behind the waveguide 123, A housing case C154 for the power supply circuit board 127, on which circuit components for supplying power to the microwave heating control unit 130 are mounted, is arranged elongated in the left-right direction.

As described with reference to FIG. 7, the front horizontal wall 101T made of a metal plate provided on the front side of the lower case 101 is formed by bending the upper end of the front plate 101F of the lower case 101 backward. The support bracket 198 on the lower case 101 side is fixed to the upper case 16 .

7 and 8, reference numeral 131 denotes a door open/close detection mechanism provided as a countermeasure against radio wave leakage during microwave heating.
In order to secure the safety of the microwave heating device, it is legally required to install the door opening/closing detection mechanism 131 . A representative door opening/closing detection mechanism 131 of this type is known from patent documents such as Japanese Patent No. 4372099 and Japanese Patent Application Laid-Open No. 11-214147.

According to the patent document, the door open/close detection mechanism 131 incorporates three types of switches: a latch switch, a door switch, and a monitor switch. is proposed.

Further, in Japanese Unexamined Patent Publication No. 11-214147, a first interlock switch and a second interlock switch are used to open and close the power supply of an inverter circuit, and when the first interlock switch is short-circuited, the switch is inserted into the power supply circuit. It has been proposed to provide a monitor switch in order to turn off the fuse that is in the circuit.

7 and 8 show the main parts of the door opening/closing detection mechanism 131 employed in the first embodiment. In these figures, 132A is a latch switch and 132B is a door switch. Although not shown, a monitor switch 133 (not shown) cuts off power to the inverter circuit 121A of the inverter circuit board 121 when either one or both of the latch switch 132A and the door switch 132B are not opened due to an abnormality. ) are also provided.

The latch switch 132A is pushed by a pin 134 fixed to the door 114 and protruding to open and close the built-in contact. The door switch 132B is pushed by a pin 135 fixed to the door 114 and protruding to open and close the built-in contact.

Reference numeral 136A denotes an interlocking rod that transmits movement of the door 114 to the latch switch 132A, and is urged toward the door by a compression spring so as to always return to the door side.
Reference numeral 136B denotes an interlocking rod that transmits movement of the door 114 to the door switch 132B, and is biased toward the door by a compression spring so as to always return to the door side.

Reference numeral 137 denotes a support plate on which the latch switch 132A, door switch 132B, monitor switch 133 (not shown), interlocking rods 136A and 136B, etc. are collectively attached. This support plate 137 is fixed to the lower case 101 with a plurality of screws. The door opening/closing detection mechanism 131 is mainly composed of various switches mounted on the support plate 137 as described above.

If the mounting positions of the latch switch 132A and the door switch 132B vary during the manufacturing process, there is a concern that the timing for operating each switch will deviate from the specified value. Therefore, in Embodiment 1, the door opening/closing detection mechanism 131 is attached to the support plate 137 (see FIG. 34), and the support plate 137 is made removable as a whole. Specifically, as described above, the lower case 101 is firmly fixed to the support plate 137 with a plurality of screws. During manufacturing and after-sales service, the operation check, adjustment, and replacement of the door opening/closing detection mechanism 131 can be performed.

7 to 9, 138A is a communication port formed in the upper portion of the case A150 housing the inverter circuit board 121, and 138B is a communication port formed in the upper and lower intermediate portions of the case A150.

The communication port 138A guides part of the cooling air RF5 from the third cooling fan 128 as shown in FIG. 9 to a space 141 which will be described later.

The communication port 138B guides part of the cooling air RF5 from the third cooling fan 128, as shown in FIG. there is

The temperature sensor 160 includes a hollow sensor case, a sensor substrate housed inside the sensor case, one or more infrared detection elements mounted on the surface of the sensor substrate, and the infrared detection elements. and a lens attached and fixed to the sensor case as main components. The temperature sensors 160 may be provided at a plurality of locations in the heating chamber 113 so that the temperature can be detected over a wide range. Alternatively, the temperature may be detected over a wide angle. For example, Japanese Patent Application Laid-Open No. 2018-54250 proposes the use of a plurality of temperature sensors.

In FIG. 9, reference numeral 161 denotes a detection window facing the temperature sensor 160, and a gap may be formed between the temperature sensor 160 and the outer peripheral surface of the temperature sensor 160 so that the cooling air can pass therethrough. In Embodiment 1, a gap of about several millimeters is formed.

The heating chamber 113 is entirely made of a thin metal plate such as a stainless steel plate. 162 is a cooking plate made of porcelain or heat-resistant plastic. The cooking plate 162 is formed to have external dimensions such that it can be taken out and put in from the front opening 113A of the heating chamber 113. As shown in FIG.

In FIG. 9, HV is the effective height dimension from the top surface of the cooking plate 162 to the ceiling surface of the heating chamber 113 . HX is the maximum height dimension from the upper surface of the cooking plate 162 to the ceiling surface of the recess 113T formed by recessing the center of the heating chamber 113 upward. In this Embodiment 1, the effective height dimension HV is 94 mm, and the maximum height dimension HX is 100 mm. This is an example, and the present invention is not limited to this size configuration.

In FIG. 10, WH is the inner width dimension of the heating chamber 113 . Since the heating chamber 113 is formed up to the front opening 113A with this inner width dimension, it can be said that it is the frontage dimension that determines whether or not the food to be cooked and cooking utensils such as a frying pan can be inserted. The inner width dimension WH is 310 mm.

Reference numeral 163 denotes an electric radiation heater for heating the heating chamber 113 from the outside, such as a sheathed heater. The heater 163 is composed of two heaters.
163A is an upper heater fixed on the ceiling surface of the heating chamber 113 in close contact or close proximity, and 163B is a lower heater fixed under the bottom surface of the heating chamber 113 in close contact or close proximity. .

The upper heater 163A can select multiple levels of heating power within a range from maximum heating power of 1200W to minimum heating power of 50W. Also, for the lower heater, the heating power can be selected in multiple steps within a range from maximum heating power of 1200W to minimum heating power of 50W.

In FIG. 9, 166R is a right side partition plate which is vertically installed so as to form a gap GP5R with the right side wall surface of the heating chamber 113, and is formed of a thin metal plate.
A left partition plate 166L is vertically installed to form a gap GP5L with the left wall surface of the heating chamber 113, and is formed of a thin metal plate.
A heat insulating material (not shown) is inserted into the gaps GP5L and GP5R on the left and right sides of the heating chamber 113 to suppress heat conduction in the heating chamber 113 .

Reference numeral 167 denotes an upper heat shield plate that covers the entire upper portion of the upper heater 163A, and is made of a thin metal plate or heat-resistant plastic.
GP6 is a gap formed between the upper heat shield plate 167 and the upper heater 163A, and its size is several mm to 10 mm. This gap GP6 is a closed space so that air does not flow with the outside. The peripheral edge of the upper heat shield plate 167 is fixed to the ceiling surface of the heating chamber 113 in close contact with the upper edges of the right partition plate 166R and the left partition plate 166L.

Reference numeral 168 denotes a lower heat shield plate having a longitudinal cross-sectional shape vertically symmetrical to that of the upper heat shield plate 167 . The lower heat shield plate covers the entire area below the lower heater 163B and is made of a thin metal plate or heat-resistant plastic.

GP7 is a gap formed between the lower heat shield plate 168 and the lower heater 163B, and its size is about several mm to 10 mm. This gap is a closed space so that air does not flow with the outside. The periphery of the lower heat shield plate 168 is fixed to the bottom wall surface of the heating chamber 113 in close contact with the lower edges of the right partition plate 166R and the left partition plate 166L.

Reference numeral 169 denotes an upper case superimposed on the peripheral portion of the upper heat shield plate 167 so as to cover the entire upper portion of the upper heat shield plate 167 . A lower case 170 overlaps the peripheral portion of the lower heat shield plate 168 so as to cover the entire lower portion of the lower heat shield plate 168 .

As shown in FIG. 9, the upper case 169 and the lower case 170 have vertically symmetrical vertical cross-sectional shapes, and are made of a thin metal plate or heat-resistant plastic. GP8 is a gap formed between the upper case 169 and the upper heat shield plate 167, and its size is about several mm to 10 mm. This gap GP8 is a closed space so that air does not flow with the outside.

GP9 is a gap formed between the lower case 170 and the lower heat shield plate 168, and its size is about several mm to 10 mm. This gap GP9 is a closed space so that air does not flow with the outside.

A sheet or plate-like heat insulating material 175A (not shown) is arranged in the gap GP6. Similarly, a sheet or plate-like heat insulating material 175B (not shown) is arranged in the gap GP8.

A sheet or plate-like heat insulating material 175C (not shown) is arranged in the gap GP7. Similarly, a sheet or plate-like heat insulating material 175D (not shown) is arranged in the GP9. When each of these heat insulating materials 175A to 175D has a structure in which multiple layers are stacked instead of a single layer structure, the heat insulating performance is further improved. The planar size (vertical and horizontal dimensions) of each heat insulating material 175A to 17D is at least larger than the installation range of each of the upper heater 163 and the lower heater 163B.

In FIG. 9, reference numeral 171 denotes a partition plate that partitions and forms a passage 172 above the upper case 169 through which the cooling air RF5 flows. A communication port 173 is opened in the upper portion of the rear wall surface of the partition plate 171 , and the inlet end of the exhaust duct 102 is connected to the communication port 173 .
A communication port 174 is formed in the rear portion of the ceiling surface of the heating chamber 113 , and the inlet portion of the exhaust duct 102 is connected to the communication port 174 . 102E is the terminal end which is the final outlet of the cooling air.

As shown in FIG. 10, the exhaust duct 102 has two independent upper and lower internal passages 102A and 102B. After that, the cooling air RF5 flows.
In addition, the cooling air RF6 introduced into the heating chamber 113 and having a raised temperature flows through the other internal passage 102B.

The air velocity of the cooling air RF5 is increased by the outlet of the cooling air RF5 with the opening area of the air passage narrowed. Therefore, the cooling air RF6 is attracted by the cooling air RF5 in the vicinity of the outlet. Due to such action, the gas inside the heating chamber 113 is sucked into the internal passage 102B.
As a result, the two cooling airflows RF5 and RF6 are both efficiently discharged from the exhaust port 20 to the outside of the heating cooker 1. As shown in FIG. It should be noted that a method of merging at an upstream stage before entering the exhaust duct 102 may be adopted without adopting such an induction structure.

In FIG. 10, 180 is a large feeding port formed on the rear wall (rear wall) 113B of the heating chamber 113, and 181 is a cover that closes the feeding port 180 from the outside. It is formed in a plate shape from heat-resistant glass. The cover 181 is fixed to the outside of the back wall (rear wall surface) 113B.

The cover 181 is in close contact with the back wall (rear wall surface) 113B. The antenna case 124 is fixed to the back wall 113B of the heating chamber 113 so as to cover the entire back side of the cover 181 . The cover 181 is inserted inside the front opening of the antenna case 124 as shown in FIG.

A waveguide 123 is connected to the rear side of the cover 181 . The motor 126 for driving the antenna is thus fixed to the back side of the waveguide 123 via the heat-resistant sealing material 184 .

Reference numeral 126A denotes a rotating shaft of the antenna driving motor 126, which is installed horizontally in the front-rear direction. The antenna 125 is fixed to the free end side (front end) of the rotary shaft 126A. Although the rotary shaft 126A is made of plastic or ceramic material, only a certain range from the antenna 125 side is made of metal, and the area from there to the antenna drive motor 126 is made of plastic, ceramic, or the like that is heat-resistant and insulated. It may also be formed of a material having excellent properties.

Reference numeral 185 denotes a radio wave sealing chamber formed with a predetermined size around the rotation shaft 126A. This radio wave sealing chamber has a so-called choke chamber structure. Further, in order to effectively prevent microwave leakage, a radio wave absorber (not shown) is placed on the side closer to the antenna drive motor 126 than the choke structure, so that microwaves from around the rotation shaft 126A are absorbed. You may try to prevent leakage. In addition, the choke structure in the microwave heating device is disclosed in Japanese patent documents, for example, JP-A-2011-174669, JP-A-2010-255978, JP-A-63-172828 (a quarter-wave choke combined use of the room and the radio wave absorber), etc., so a detailed explanation is omitted.

In FIG. 10, LA indicates the dimension from the back wall (rear wall surface) 113B of the heating chamber 113 to the rear end of the antenna driving motor 126. In FIG. Henceforth, this dimension is called a "projection dimension." It is desirable to reduce this projecting dimension LA, but in reality, as described above, the dimensions of the antenna case 124 and the radio wave sealing chamber 185 are also necessary, and even if the external dimensions of the antenna driving motor 126 are reduced, there is a limit. There is This dimension LA is 70 mm.

In FIG. 10, GP10 is the gap between the back surface of the antenna drive motor 126 and the inclined portion 101C of the lower case 101. The upper end of the motor 126 is 69 mm, and conversely, the gap between the lower end and the lower case 101C is 53 mm. degree. Since it is impossible to dispose the case C154 in the gap GP10 in terms of dimensions, in the first embodiment, the case C154 is shifted rightward from directly behind (behind) the antenna drive motor 126. are placed.
This made it possible to incorporate the microwave heating device 120 in a narrow space behind the heating chamber 113 .

Next, the internal structure of door 114 will be described.
In FIG. 10, reference numeral 190 denotes a metal or plastic frame that constitutes the outer shell of the door 114, and is shaped like a picture frame when viewed from the front. 192 is an inner frame, which is made of a metal plate. An opening serving as a viewing window 192W is formed in the central portion of the inner frame 192. As shown in FIG.

Reference numeral 191 denotes a cover whose outer peripheral edge is fixed between the inner frame 192 and the frame 190 so as to cover the entire front side of the inner frame 192, and is transparent and heat-resistant so that the heating chamber 113 can be seen. It is made of plastic, glass, or the like.

Reference numeral 193 denotes an inner seal frame formed with a large number of small holes having dimensions that do not transmit microwaves in a portion corresponding to the viewing window 192W. The inner seal frame is formed entirely by press-molding a thin metal plate, and has a choke chamber 194 formed with an entrance (slit) on the heating chamber 113 side at the outer peripheral edge.

195 is a seal plate made of a metal thin plate. The outer peripheral edge of the seal plate 195 is continuously curved toward the inner seal frame 193 as shown in FIG. The choke chamber 194 is a space surrounded by the outer peripheral edge of the seal plate 195 and the inner seal frame 193 .

When the door 114 is completely closed, both the outer peripheral edge of the seal plate 195 and the inner seal frame 193 are in contact with the surface of the front plate 101F of the lower case 101. As shown in FIG. Therefore, the microwave supplied to the inside of the heating chamber 113 does not leak from the door 114 and the opening 113A on the front surface of the heating chamber 113. FIG.

A transparent seal plate 196 is provided inside a portion of the inner frame 192 corresponding to the viewing window 192W, and is made of heat-resistant glass. 197 is a metal upper shielding plate along the upper surface of the door 114 and having a width dimension at least equal to the width of the door 114 . The upper shielding plate 197 is provided in the shape of an eave close to the upper surface of the door 114, and is fixed to the lower case 101 with fasteners such as metal screws so as to be electrically connected to the lower case 101. FIG.

Since the lower part of the door 114 is supported by the lower case 101 by a hinge (not shown), the door 114 can be opened by holding the handle 115 and pulling it forward.
At the initial stage of such opening, there is a concern that a portion of microwaves may leak due to a momentary gap in the overlapping portion between the door 114 and the lower case 101. However, in the first embodiment, the upper shielding plate 197 can suppress such unwanted microwave leakage above the door 114 .

In FIG. 12, reference numeral 201 denotes an introduction port formed in the front part of the right side wall surface of the heating chamber 113, and is formed of a large number of small holes that do not leak microwaves. The reason why the inlet 201 is provided at the front portion of the right wall surface of the heating chamber 113 is to supply part of the cooling air RF6 to the vicinity of the inner side of the door 114 to suppress fogging of the viewing window 192W of the door 114. be.
Cooling air RF6 after cooling the heat radiating portion 122H of the magnetron 122 is guided to the introduction port 201 by the gap GP5R.

The temperature sensor 160 is located upstream of the inlet 201 in the flow of the cooling air RF6, and part of the cooling air RF6 is blown into the heating chamber 113 at the temperature sensor 160. The amount of cooling air RF6 reaching the inlet 201 is small. However, the purpose of introducing air from the introduction port 201 is to "prevent fogging" of the seal plate 196 inside the door 114, and there is no problem with a small amount of air. It should be noted that the supply of air from the narrow gap around the temperature sensor 160 may not be adopted.

Next, the details of the control means will be described with reference to the block diagram shown in FIG.
The microwave heating control unit 130 controls the power supplied to the inverter circuit 121A of the inverter circuit board 121, the magnetron 122, the antenna drive motor 126, and the two cooling fans 128 and 129, and starts their operations. , stop, operating conditions, and the like.

The power circuit of the microwave heating control unit 130 is prepared separately from the power circuit 91 mounted on the power circuit board 55 and is a dedicated circuit for the microwave heating device 120 .
A power circuit of the microwave heating control unit 130 is mounted on the power circuit board 127 . Various electric parts (diodes, etc.) for converting AC power to DC are mounted on the power circuit board 127 and housed in a case C154 in a sealed state (see FIG. 7).

When receiving the command signal from the power control unit 72, the microwave heating control unit 130 operates to reduce the total power consumption of the microwave heating device 120 according to the command signal, and the output of the magnetron 122 has a function of transmitting a command signal to lower the voltage to the inverter circuit 121A.

The microwave heating control section 130 includes a temperature sensor TS1 for detecting the temperature of the heat radiation section 122H of the magnetron 122. As shown in FIG. If the temperature of the heat radiating part 122H of the magnetron 122 is higher than the specified value even after the microwave cooking is finished, a command signal for continuing the operation of the fourth cooling fan 129 is sent to the fourth cooling fan 129 until the temperature drops. Send to fan 129 .

139 is a closing detector for the door 114 . The closing detector 139 detects the open/close state of one or more of the latch switch 132A, the second door switch 132B, and the monitor switch 133 by means of the current flowing through each circuit or the open/close signal.

Since the circuit board that constitutes the closing detector 139 is attached to the support plate 137, the support plate 137 may be removed for inspection, or the circuit board may be measured with the support plate 137 installed to check whether the circuit board operates normally. can be inspected (see FIG. 7).

Reference numeral 158 denotes a non-contact temperature measurement unit (infrared temperature measurement unit) that detects the temperature of food, cooking utensils, etc. placed in the heating chamber 113. The temperature sensor 160 and the measurement signal from this temperature sensor are It is composed of a circuit (not shown) that analyzes and converts to temperature information.

The heating chamber control unit 159 controls the power supplied to the upper heater 163A and the lower heater 163B, and controls the start/stop of their operation, operating conditions (thermal power, ie, heat generation amount), and the like. A control circuit of the heating chamber control section 159 is mounted on a control circuit board (not shown).

When receiving a command signal from the power control unit 72, the heating chamber control unit 159 operates according to the command signal to reduce the total power consumption of the upper heater 163A and the lower heater 163B. and a command signal to lower the output of the lower heater 163 . In order to lower the output of the upper heater 163A and the lower heater 163, the energization rate per unit time is also changed to change the substantial heating power.

Next, a configuration example of a drive circuit for the IH coils 17L and 17R of the heating cooker 1 will be described. For explanation of FIG. 17, an example of a circuit showing only one IH coil 17R will be explained.

In the heating cooker 1, induction heating is performed by supplying high-frequency power to the IH coils 17L and 17R from the drive circuit 74. As shown in FIG.
The drive circuit 74 is provided for each IH coil. FIG. 17 is a diagram showing a configuration example of the drive circuit 74 for the IH coil 17R. The drive circuit for the left IH coil 17L may be the same or may be different.

As shown in FIG. 17, the drive circuit 74 includes a DC power supply circuit 75, an inverter circuit 81R, a resonance capacitor 76, an input current detector 77a and an output current detector 77b.
Current detection data of the input current detection section 77 a and the output current detection section 77 b are sent to the control device 90 .

The input current detection unit 77a detects the current input from the AC power supply 99 to the DC power supply circuit 22, that is, the current input to the drive circuit 74, and outputs a voltage signal indicating the detected value, that is, the input current value to the control device 90. Output. 99 is a commercial AC power supply.

The DC power supply circuit 75 includes a diode bridge 78a, a reactor 78b, and a smoothing capacitor 78c, converts an AC voltage input from the AC power supply 99 into a DC voltage, and outputs the DC voltage to the inverter circuit 81R.

The inverter circuit 81R is a so-called half-bridge inverter in which IGBTs 79a and 79b as switching elements are connected in series to the output of the DC power supply circuit 75. FIG. In the inverter circuit 81R, diodes 79c and 79d as flywheel diodes are connected in parallel with the IGBTs 79a and 79b, respectively.
The inverter 81R converts the DC power output from the DC power supply circuit 75 into high-frequency AC power of about 20 kHz to 80 kHz, so-called high-frequency power, and supplies the high-frequency power to the resonance circuit consisting of the IH coil 17R and the resonance capacitor 76.

A resonance circuit including the resonance capacitor 76 has a resonance frequency corresponding to the inductance of the IH coil 17R, the capacitance of the resonance capacitor 76, and the like.

With this configuration, a high-frequency current of about several tens of amperes flows through the IH coil 17R, and the object to be heated 5 on the top plate 15 directly above the IH coil 17R is induced by the high-frequency magnetic flux generated by the flowing high-frequency current. heated.

The IGBTs 79a and 79b are composed of, for example, a silicon-based semiconductor, but may be composed of a wide bandgap semiconductor such as silicon carbide or gallium nitride-based materials.

By using a wide bandgap semiconductor for the IGBTs 79a and 79b as the switching elements, it is possible to reduce the conduction loss of the IGBTs 79a and 79b as the switching elements. Also, even if the switching frequency, that is, the driving frequency, is set to a high frequency, that is, even if the switching is performed at a high speed, heat dissipation is improved. Therefore, it is possible to reduce the size of the heat radiation fins of the heat sink 82 to which the switching elements (IGBTs) 79a and 79b are attached, and to reduce the size and cost of the drive unit.

The output current detector 77b is connected to a resonance circuit composed of the IH coil 17R and the resonance capacitor . The output current detector 77b detects, for example, the current flowing through the IH coil 17R, that is, the current output from the drive circuit 74, and outputs a voltage signal corresponding to the detected value to the control device 90. Although a half-bridge inverter has been described in this configuration, the circuit that drives the IH coil 17R may be a full-bridge inverter.

The wireless communication unit 49 is a wireless communication means for performing wireless communication with a home control device (not shown) that comprehensively manages power consumption, operation information, etc. of household electrical appliances. It can send and receive radio signals. The home control device can also be connected to a portable information terminal such as a smart phone, a tablet terminal device, or the like via a public wireless communication network such as the Internet.

The wireless communication unit 49 is connected to the integrated control unit MC by wiring, but the longer the wiring, the more susceptible it is to noise. 49 and the integrated control device MC should be shortened.

Considering the influence of the noise mentioned above, the wireless communication section 49 is installed at the right end of the input operation section 40 in the first embodiment. Specifically, the wireless communication section 49 is installed at the right end of the operation board 41 . In addition, the integrated control device MC is installed in the left-right central portion of the input operation unit 40 (see FIG. 14).

The wireless communication unit 49 has an antenna unit for transmitting, receiving, or transmitting/receiving wireless signals inside. It is desirable to arrange it so that

(Operation of heating cooker)
Next, the outline of the operation of the heating cooker 1 configured as described above will be described mainly with reference to FIGS. 18 to 24. FIG.

FIG. 18 is a flow chart for explaining the entire control operation of the heating cooker 1 before starting cooking.
FIG. 19 is a flowchart for explaining the control operation during induction heating cooking in the heating cooker 1. FIG.

FIG. 20 is a flow chart for explaining the control operation in the case where the heating cooker 1 performs microwave heating during induction heating cooking. FIG. 21 is a flow chart for explaining the control operation of the heating cooker 1 of FIG. FIG. 22 is a flow chart for explaining the control operation of the heating cooker 1. FIG. FIG. 23 is a flow chart for explaining the control operation of the heating cooker 1. FIG. FIG. 24 is a list showing the correspondence relationship between the cooling fan of the heat cooker 1 and the type of heat cooking.

FIG. 18 will be described.
A basic operation program from power-on to the start of preparation for cooking is stored in the storage device MM inside the integrated control device MC.
In the built-in type heating cooker 1, the power plug 106A is always connected to the commercial (AC) power supply 99 from the time the kitchen furniture 2 is installed. ) to turn on the power (step ST1 in FIG. 18).

Then, a predetermined low power supply voltage is supplied to the integrated control device MC via the DC power conversion unit 92 in the power circuit board 55, and the integrated control device MC is activated. The control program of the integrated control device MC itself starts diagnosing whether or not there is an abnormality in itself.

Then, the controller 90 centrally controlling the induction heating source 17, the heating chamber controller 159, and the microwave heating controller 130 are checked for abnormality.

A total of seven temperature sensors TS3 to TS9 are connected to the temperature detection circuit 93 of the upper unit 100 to detect the temperature of the top plate 15, the inverter circuits 81L and 81R, the temperature near the central display section 30, and the like. Therefore, the temperatures detected by these temperature sensors are transmitted to the temperature detection circuit 93 . Thereby, the control device 90 can determine whether or not there is an abnormality (ST2).

Also, in the heating chamber controller 159 and the microwave heating controller 130, it is possible to acquire the detected temperatures from the temperature sensors TS1 and TS2 and determine whether there is an abnormality.

In step ST2, there is "transmission of activation information to the outside". (not shown) to give notice of the start of operation of the heating cooker 1. This will be explained later.

Since the control device 90 collects temperature information of the main components built in the upper unit 100, the control device 90 performs abnormal heating determination processing as abnormality monitoring control before starting cooking. For example, when the temperature detected by the temperature sensor TS7 is higher than the heat-resistant temperature (for example, 70° C.) of electronic elements such as the liquid crystal display screen in the central display section 30, the control device 90 determines that the temperature is abnormally high. Then, it notifies the integrated control device MC of the abnormality, and executes processing such as displaying or notifying that the operation cannot be started.

If no anomaly is found, controller 90 signals integrated controller MC. Then, the central display unit 30 is activated to display the message "There is no abnormality, so cooking can be started" (ST3).
At the same time, the speech synthesizing device 95 notifies the same content as the content displayed on the central display section 30 by voice (ST3).

In step ST3, the wireless communication unit 49 accesses the "domestic control device" and acquires information such as cooking menus and recipe information useful for health management within the range previously set by the user. For example, the information previously transmitted by the user of this heating cooker 1 to the "domestic control device" via the Internet line using a portable information terminal device or the like can also be obtained when the central display unit 30 is activated. . When some information is acquired, a dedicated warning information lamp (not shown) provided near the input operation section 40 of the upper unit 100 is turned on to notify the user.

Next, after completion of the abnormality determination as described above, the integrated control device MC uses the central display unit 30 and the voice synthesizer 95 to perform notification and voice guidance for prompting the user to select the heating means (ST4).

Then, the control device 90 determines whether or not the heating source of the lower unit 200 has been selected from the operation information of the central operation section 40M in the input operation section 40 (ST5).

If no selection is made within a certain grace period (for example, 30 seconds), or immediately after step ST4, the user operates at least one of the left operating section 40L and the right operating section 40R. In this case, it is determined that only the heating sources of the upper unit ST6, that is, the IH coils 17L and 17R have been selected ("Yes" in step ST6).

When step ST6 is "Yes" as described above, the process proceeds to the next step ST10. Subsequent induction heating control steps will be described later with reference to FIG.

On the other hand, when the heating source of the lower unit 200 is selected in step ST5, the integrated control device MC proceeds to menu selection step ST8 of the two heating sources provided in the lower unit 200. FIG.

At step ST8, as shown in FIG. 18, four menus are displayed on the central display section 30 in list form. Or they are displayed sequentially in a certain order.

The menu displayed at step ST8 in FIG. 18 is based on the heating source of the lower unit 200, and the following four menu selection sections are displayed.
(1) Cooking menu using at least one of the upper heater 163A and the lower heater 163B (ST9A).
(2) In addition to the above (1), a cooking menu using the microwave heating device 120 (ST9B).
(3) Cooking menu using microwave heating device 120 (ST9C).
(4) Cooking using a combination of at least one of the upper heater 163A and the lower heater 163B, at least one of the microwave heating device 120, and the induction heating sources (IH coils 17L, 17R) of the upper unit 100 A menu (hereinafter referred to as a "cooking menu") (ST9D).

Although the route from step ST10 to step ST9D is indicated by a dashed line, it is better to start the cooperative cooking from the middle after proceeding with the operation to select the heating source of the upper unit 100 in this way. If it is found that the user is aware of this, the cooperative cooking menu may be selected without returning to step ST5. In addition, like this, the cooperative cooking can be selected at another opportunity so that the cooperative cooking can be advanced from the middle. This will be explained in FIG. 19 below.

FIG. 19 shows the operation steps of the integrated controller MC after the step (ST11) of selecting the induction heating menu.

Next, the control operation during induction heating will be described with reference to FIG.
An example using the heating unit on the right side will be described below.
When the input key 45R on the right side is touched, the control device 90 determines that the user has commanded the heating preparation operation.

It is estimated whether or not an object to be heated (metal pot, frying pan, etc.) is placed above the IH coil 17R, or whether or not the bottom area of the object to be heated is larger than a predetermined value. The information is transmitted to the control device 90, and it is determined whether the heat treatment should be suitable for a standard-diameter pan or a large-diameter pan (step MS1).
If the pot is compatible but has a large diameter, or if the pot is unsuitable for heating, it will be processed differently from the standard pot.

Upon receiving the command from the control device 90, the integrated control device MC displays on the display screen of the central display unit 30 a prompt to select the desired cooking "control mode" (MS2).

When the user selects and inputs the cooking "control mode", heating power, cooking time, etc. through the input operation unit 40 (MS3), the induction heating operation is started in earnest (MS4).
The “control modes” (control menu) displayed on the central display unit 30 include “rapid heating”, “fried food”, “boiling”, “preheating”, “cooking rice”, “boiling”, “boiling + keeping warm”, It is eight called "coordinated heating".

When the user selects any one of these eight control modes, the control conditions corresponding to these control modes are automatically selected by the built-in program of the control device 90, and the energization amount (thermal power) of the IH coil 17R ), power-on time, etc. are set. Depending on the cooking menu, a display prompting the user to set desired heating power, power supply time, etc. is displayed on the display unit (MS5).

Unless the user operates the key 45R within a certain period of time (for example, 30 seconds) after the display as described above, the controller 90 drives the inverter circuit 81R of the induction heating circuit 94R after that period of time. and start induction heating (MS6).

In the case of the "large-diameter pan", steps MS1 to MS7 are basically the same, but some of the eight control modes shown in FIG. 19 cannot be selected as the control mode. In the "high-speed heating mode", the large-diameter IH coil 17L on the left side can be used to heat only the "normal pot" or the "large-diameter pot". In the first embodiment, a small pan means a pan with a bottom diameter of less than 10 cm, which is detected as unsuitable for induction heating and cannot be induction heated.

Next, the integrated power control operation when two or more different types of heating sources such as induction heating and microwave heating are used at the same time will be described with reference to FIGS. 20 to 22. FIG. It should be noted that the examples described with reference to FIGS. 20 to 22 are not the case of the above-described "cooperation cooking".

The example shown in FIG. 20 is a case where the user attempts microwave heating using the heating chamber 113 of the lower unit 200 during induction cooking in the upper unit 100 . Even when oven cooking, grill cooking, or the like is performed using either one or both of the upper heater 163A and the lower heater 163B during the induction heating cooking period, as described with reference to FIG. Basic total power control (in the entire heating cooker 1) is performed by the integrated control device MC and the power control unit 72. FIG.

When the user attempts to perform microwave heating using the heating chamber 113 of the lower unit 200 during induction cooking, the central operation unit 40M of the input operation unit 40 first opens the lower unit 200. There are ways to choose a heating source.
However, an easy way to do this is to simply open the door 114 . That is, in Embodiment 1, when the upper unit 100 is in operation (when the main power switch 97 is in the ON state), the lower unit 200 can start cooking. Therefore. The operation of turning on the main power switch 97 like the upper unit 100 is not required.

When the door 114 is opened, there are the latch switch 132A and the door switch 132B which are opened and closed according to the opening and closing of the door 114 as described in the main part of the door opening/closing detection mechanism 131, so the main power switch 97 is turned on. The integrated controller MC may monitor the opening of both or one of the latch switch 132A and the door switch 132B by appropriate means (sensor, switch, etc.).

In FIG. 20, when receiving a signal indicating that the door 114 of the heating chamber 113 has been opened as described above, the integrated controller MC sets the thermal power (power consumption) corresponding to the microwave heating menu to the user. (step S2). For example, when it is detected that food is placed in the heating chamber 113 and the door 114 is closed, an inquiry such as "Please set the heating power" is sent to the user through a voice guide or the like.

When the user inputs the thermal power through the central operation unit 40M, the process proceeds to the next step S3.
Alternatively, if the user simply instructs "heating start" from the central operation unit 40M, the power consumption of the third cooling fan 128, the fourth cooling fan 129, etc. Using the power consumption value that is reflected and known in advance, the integrated control device MC determines whether or not the total power regulation value is exceeded in step S3.

For example, the power consumption of the first cooling fan 60 and the power consumption of the second cooling fan 61 are stored as data in the integrated control device MC, so the power consumption of the upper unit 100 is and the total power consumption of the microwave heating device 120 can be calculated. Note that the integrated control device MC may acquire the power consumption data of the inverter circuit 81 when the central operation unit 40M is operated.

If step S3 is "Yes", it is necessary to lower either the output of the operating IH coil 17R or the heating power of the microwave heating. In step S3, the priority of induction heating cooking at that time is determined from the induction heating cooking menu and the control mode. For example, when rice is being cooked in the upper unit 100, the rice cooking is given priority and the heating power of the heating source of the upper unit 100 is not reduced.

In addition, when "frying" is performed in the upper unit 100, the frying is controlled so that the heating power is automatically increased so that the temperature of the cooking oil does not drop excessively according to the introduction of the ingredients. Therefore, even in such a case, the thermal power of the heating source of the upper unit 100 is not reduced.

In step S5, if it is determined that induction heating has priority, in order to reduce the power consumption of microwave heating, if the microwave rated output is 600 W (power consumption is 1000 W), the power consumption is temporarily reduced. and set the output to 300 W, for example. Then, the user is notified that such a restriction will be applied. Notification is performed by the central display unit 30 and the voice synthesizer 95 (S6).

Then, the integrated controller MC issues a command signal to the microwave heating control section 130 to start microwave heating with low thermal power (S7).
Since the heating chamber 113 has a non-contact temperature measurement unit (infrared temperature measurement unit) 158 that detects the temperature of food, cooking utensils, etc. placed in the heating chamber 113, it is possible to determine whether the food has been heated and reached the target temperature. is monitored by the microwave heating control unit 130 (S8).

If the target temperature is not reached, it is determined whether or not the induction heating operation of the upper unit 100 has ended (S9). Steps S8 and S9 are repeated until the target temperature is reached.

When the target temperature is reached, the microwave heating controller 130 outputs a signal to the integrated controller MC. Then, the process proceeds to the next step S12 to inform that the microwave heating has ended.

When the induction heating is completed, the process proceeds to step S10, where a command is issued to the microwave heating control unit 130 to restore the set thermal power initially intended by the user and continue microwave heating (S10). Then, the monitoring of the temperature of the object to be heated is continued (S11).

Then, when the target temperature is reached, the integrated controller MC receives a signal from the microwave heating controller 130, proceeds to step S12, and notifies that the microwave heating has ended.
In the example shown in FIG. 20, the temperature of the object to be heated is monitored, and the microwave heating is terminated when the target temperature is reached. However, there is also a control method of measuring the irradiation time of microwaves and ending cooking when a set time elapses, so FIG. 21 will be described next.

FIG. 21 shows an example in which a control method is adopted in which the cooking is finished within the microwave irradiation time.
Since steps up to step S6 are the same as those in FIG. 20, description thereof will be omitted.

When starting microwave heating in step 7, the microwave heating control unit 130 calculates the correction (extension) of the heating time when the output of the magnetron 122 is lowered to a certain value. Then, in step S8, the time after the extension is determined as "set time 1" (S8), and steps 9 and 8 are repeated.

In the process, when the induction heating of the upper unit 100 is completed, the required operation time (set time 2) is recalculated in consideration of the elapsed time from the start of heating (step S7).

Then, when the set time 2 has passed, the microwave heating is terminated and this is reported (S12). Note that temperature monitoring by the non-contact temperature measurement unit (infrared temperature measurement unit) 158 may be used together until the set time 2 elapses.

Next, FIGS. 22 and 23 will be described.
22 and 23 are flow charts for explaining the control operation of the heating cooker 1. FIG. In the example shown in FIGS. 22 and 23, the user attempts microwave heating using the heating chamber 113 of the lower unit 200 while induction cooking is being performed in the upper unit 100. is the case. Even in this case, the basic total power control (over the cooking device 1 as a whole) as described with reference to FIG.

In FIGS. 22 and 23, unlike FIGS. 20 and 21, the induction heating device consisting of the integrated control device MC, the microwave heating device 120, the IH coils 17L and 17R, the inverter circuit 81, etc. It also shows the sending and receiving of signals.

In FIGS. 22 and 23, L1 to L10 indicate generation timings of operation signals, command signals, and the like. When the main power switch 97 is turned on in the upper unit 100, a start signal is sent to the integrated control device MC (L1).

After that, when the heating power of the IH coils 17L and 17R, the control mode, etc. (see steps MS2 and MS3 in FIG. 19) are determined by the input operation unit 40, information indicating the content is transmitted via the integrated control device MC (L2). . That is, the control device 90 receives information indicating conditions such as the maximum heating power and operating time during induction heating from the integrated control device MC. When there is an induction heating start command from the input operation unit 40, the control device 90 causes the induction heating circuits 85L and 85R to start heating operations.

A case in which induction heating cooking is started in this manner and microwave heating is also started will be described. It is assumed that the induction heating is started with the maximum heating power of 3200 W of the left IH coil 17L.

When the user opens the door 114, both or one of the latch switch 132A and the door switch 132B are opened as described with reference to FIG. is sent to the integrated controller MC (L3).

When the user inputs thermal power through the central operation unit 40M, the integrated controller MC issues a command signal to start operation to the microwave heating control unit 130. FIG. Then, the process proceeds to the next step S3.
Alternatively, when the user simply instructs "heating start" from the central operation unit 40M, the integrated controller MC issues a command signal to start operation to the microwave heating control unit 130. FIG.

If there is no abnormality on the microwave heating control unit 130 side, the microwave heating control unit 130 transmits a "notice signal" to start cooking to the integrated control device MC (L4).

Next, upon receiving information from the integrated control device MC, the power control unit 72 reflects the power consumption of the third cooling fan 128, the fourth cooling fan 129, etc. to the rated power consumption value determined by the magnetron 122, and Calculate the total power consumption when microwave heating and induction heating are performed at the same time using the known power consumption value, and determine whether this total value exceeds the total power regulation value. (Same as step S3 in FIGS. 20 and 21). Then, the result is transmitted to the integrated control device MC.

If step S3 is "Yes", it is necessary to lower either the output of the operating IH coil 17R or the heating power of the microwave heating. In the next step S4, the integrated controller MC determines the priority of induction heating cooking at that time from the induction heating cooking menu and the control mode.

In the example of FIG. 22, the heating power of microwave heating is not reduced because it is set to give priority to microwave heating.

In step S5, if it is determined that microwave heating has priority, in order to reduce the power consumption of induction heating, the microwave heating control unit 130 is instructed to control the target heating power of the IH coil 17R to decrease, and the power consumption temporarily lower the The user is notified that such restrictions will be applied. The notification operation is performed by the central display unit 30 and the voice synthesizer 95 .

Then, the microwave heating control unit 130 instructs the inverter circuit 81R to change the heating power of the microwave heating to a low one (L5).

When the power reduction process on the inverter circuit 81R side ends, the microwave heating control section 130 determines that the power has been reduced from the current values of the input current detection section 77a and the output current detection section 77b. Then, a message to the effect that the power reduction has been completed is transmitted to the integrated control device MC (L6). Upon receiving this transmission, the integrated controller MC transmits a permitting signal for starting the heating operation to the microwave heating device 120 (L7).

The inverter circuit 121A includes a current detection section (not shown) such as the input current detection section 77a and the output current detection section 77b used in the inverter circuit 81R of the upper unit 100. FIG.

Therefore, when the microwave heating ends, the microwave heating control unit 130 determines from the current detection value of the inverter circuit 121A that the heating operation has ended, and notifies the integrated control device of the heating operation with a specific signal (L8 ). Also, microwave heating may be performed for a certain period of time depending on the timer setting. In this case, the microwave heating control unit 130 detects the elapsed time and notifies that the heating operation has ended (L8).

After completing the microwave heating, the integrated controller MC issues a command signal to the microwave heating controller 130 so as to restore the set thermal power initially desired by the user (L9). Then, increase the heating power to the initial target level and continue the induction heating (S10).

Then, when the set cooking time and target temperature are reached, the microwave heating control section 130 terminates the induction heating. Then, the integrated control unit MC is notified that the operation has ended (L10).

(Basic operation of induction heating cooking)
Next, in the heating cooker 1 according to Embodiment 1, the basic operation of each part when induction heating is performed will be described.

When a command to start induction heating cooking is given in the input operation unit 40, the control device 90 issues a drive command to the induction heating circuits 85, 85R corresponding to the designated heating unit, and controls the IH coils 17L, 17R. It drives the inverter circuits 81L and 81R.

An operation command signal is issued from the control device 90 to the cooling fan drive circuit 62 .
Simultaneously with the start of driving the inverter circuits 81L and 81R or at a slightly delayed timing, the first cooling fan 60 and the second cooling fan 61 are started to operate.

The blowing capacities of the first cooling fan 60 and the second cooling fan 61 may not be fixed. For example, depending on the temperatures of the temperature sensor TS8 of the heat sink 82 and the temperature sensor TS that detects the temperature in the vicinity of the central display section 30, the blowing capacity may be automatically changed between weak operation and strong operation.

In general, when the cooling fan is changed from weak operation to strong operation, there is a concern that the wind noise of the fan will become louder, resulting in noise. Therefore, the temperature detected by the two temperature sensors TS7 and TS8 and the operating strength of the cooling fans 60 and 61 are determined in advance as a correspondence table (data table) from data such as a previous ventilation test. It is stored in the storage device 90R of the control device 90. FIG. The control device 90 may change the operating conditions of the first cooling fan 60 and the second cooling fan 61 as needed according to the data table.

When the first cooling fan 60 is operated, air is sucked from the ventilation holes 64 positioned directly below the first cooling fan 60 . Cooling air RF1 is pushed into the first air passage F1 from the air outlet 60A as indicated by an arrow in FIG.

When the second cooling fan 60 is in operation, air is sucked from the ventilation holes 64 located directly below the second cooling fan 60 . Cooling air RF2 is pushed into the second air passage F2 from the outlet 61A as indicated by an arrow in FIG.

The ventilation holes 64 directly below the first cooling fan 60 and the ventilation holes 64 directly below the second cooling fan 60 are provided adjacently on the bottom surface of the upper case 16, but there are many of them. may be provided and the group of small holes may be shared.

A diode 79c (see FIG. 17) and other electrical components are mounted on the upper surface of the inverter circuit board 80, and are cooled by the cooling air RF1.

Two IGBTs 79a and 79b are used for one IH coil 17L. These two IGBTs are collectively called a power control switching element 83 .
Similarly, the power control switching element 83 is used for the other IH coil 17L.

These two power control switching elements 83 generate heat during the induction heating operation, but are continuously cooled by the cooling air RF1.

The cooling air RF3 travels rightward while cooling parts such as various switches arranged in the input operation unit 40 that receive input operations, the liquid crystal display screen, the display unit drive circuit 63, and the like.

Some of the cooling airflow RF1 changes its direction upward when it exits the outlet FO of the cover 70, but since there is also momentum of the cooling airflow RF2 that joins from the front side, it moves above the cover 70 like the cooling airflow RF3. , and one that advances in the direction of the filter circuit board 54 as shown by the cooling air RF4.

The cooling air RF3 flows below the right IH coil 17R and then directly below the left IH coil 17L. In this process, the two IH coils 17R, 17L are cooled. Generally, the temperature of this type of IH coil rises to around 250° C. to 300° C. during induction heating. Therefore, cooling is performed with cooling air RF3, which is a combination of the two cooling airs RF1 and RF2, as described above.

As described with reference to FIGS. 13 and 14, the exhaust window 52A is present in the left-hand range from the left-right center line CL1 over the length indicated by the symbol LF. Therefore, after passing through the filter circuit board 54, the cooling air RF4 travels leftward, passes through the through hole 53A, and is discharged from the exhaust window 52A.

The cooling air RF3 that has cooled the IH coils 17L and 17R also changes its direction to advance toward the exhaust window 52A, which is the final exhaust port, passes through the through hole 53A, and is discharged from the exhaust window 52A.
As a result, the cooling airflows RF3 and RF4 flowing inside the upper case 16 reach the exhaust port 20. As shown in FIG. Then, it is discharged from the exhaust cover 19 into the room.

Since the exhaust window 52A is installed only at a position away from the filter circuit board 54, cooking liquid or water overflowing from a pan or the like (hereinafter referred to as "foreign matter") may be left on the exhaust cover 19 during operation. ) flows, it is possible to prevent the foreign matter from passing through the exhaust port 20 and reaching the filter circuit board 54 . Therefore, it is possible to prevent electric leakage and malfunction. As described above, the filter circuit board 54 and the gap GP1 are separated by the partition plate 52 except for the exhaust window 52A. The term "separation" as used herein does not mean separation that can completely block the flow of air, but means separation to the extent that it is possible to prevent foreign matter dripping or flowing down from above from entering.

(Basic operation of microwave cooking)
Next, in the heating cooker 1 according to Embodiment 1, the basic operation of each part when microwave heating is performed will be described.

When the main power switch 97 is turned on, microwave cooking can be started without actually performing induction heating cooking in the upper unit 100 . However, once the main power switch 97 is turned off, the main power switch 97 must first be turned on in order to start microwave cooking.

For safety reasons, the main power switch 97 is automatically reset after a certain period of time (eg, 30 minutes) from the last time any of microwave heating, oven (heating chamber 113) heating, and induction heating is finished. is released. Alternatively, the main power switch 97 is automatically opened when the temperatures of the top plate 15, the heating chamber 113, and the like all fall below a specified value. We have adopted these safety measures.

Next, when the door 114 is opened and the food to be cooked is put into the heating chamber 113 and the door 114 is occupied, the input operation unit 40 issues a command to start microwave cooking. Device MC issues a drive command to microwave heating control unit 130 to start operation of third cooling fan 128 and fourth cooling fan 129 .

The microwave heating control unit 130 drives the inverter circuit 121A of the magnetron 122 to radiate microwaves from the oscillation unit 122A. Note that the microwave here means a radio wave of 2450 MHz±50 MHz.

The generated microwaves are guided into the antenna case 124 from the waveguide 123 . Since the driving motor 126 of the antenna 125 starts operating at the timing when the microwave is oscillated, the microwave introduced into the antenna case 124 is caused by the action of the rotating antenna 125 and the rotating shaft 126A. It can be propagated evenly inside the heating chamber 113 . The operation of this type of antenna and the rotating shaft 126A is described in detail in, for example, Japanese Patent No. 4836965 and Japanese Patent No. 5674914, so detailed description thereof will be omitted.

When the third cooling fan 128 is operated, air is sucked into the case A150 from the air intake F152F formed in the bottom plate 101U of the lower case 101 and becomes cooling air RF5. The cooling air RF5 first cools the inverter circuit board 121 and cools various electric components mounted on the circuit board.

The cooling air RF5 then passes through the communication openings B138B and A138A provided at two upper and lower portions of the case A150.

The temperature sensor 160 is installed in the mounting hole of the right partition plate 166A. A minute gap of several millimeters or less exists between the outer shell case of the temperature sensor 160 and the rim of the mounting hole. The cooling air RF5 passes through this gap and is blown out from the detection window 161 of the temperature sensor 160 into the heating chamber 113 .

On the other hand, most of the cooling air RF5 that has cooled the inverter circuit board 121 is guided to the passage 172 from the communication port A138A. In other words, it is guided to the passage 172 formed between the upper case 169 covering the upper part of the heating chamber 113 and the partition plate 171 . This passage has the effect of preventing the high heat from being transmitted to the upper unit 100 side even if the upper heater 163A above the heating chamber 113 reaches a high temperature exceeding 300.degree.

When the position of the communication port 173 is viewed from the communication port A138A in plan view, the communication port 173 is located diagonally across the passage 172 rearward. That is, the communicating port is located at the furthest position.
Therefore, the entire air in the passage 172 is guided to the communication port 173 and introduced into the exhaust duct 102 extending horizontally rearward through the communication port 173 (see FIG. 10).

After exiting the exhaust duct 102, the cooling air RF5 merges with the cooling air RF6 rising from below and is discharged from the air outlet 20 into the room.

Next, the flow of the cooling air RF6 by the fourth cooling fan 129 will be described.
When the fourth cooling fan 129 is operated, as shown in FIG. 8, air is sucked into the case A151 from the intake port B152B formed in the bottom plate 101U of the lower case 101 and becomes cooling air RF6. The cooling air RF6 first cools the heat radiating portion 122H of the magnetron 122 and reaches the duct 153 through the heat radiating portion 122H.

The cooling air RF6 then enters the gap GP5R adjacent to the right side of the heating chamber 113 from the duct 153 and advances forward. Then, as shown in FIG. 12, it is introduced into the heating chamber 113 through the introduction port 201 .

Since the inlet 201 is located near the opening 113A of the heating chamber 113, part of the cooling air RF6 also reaches the inside of the door 114, eliminating fogging of the sealing plate 196 on the heating chamber 113 side. .

The cooling air RF6 introduced into the heating chamber 113 has the purpose of discharging water vapor, smoke, etc. generated from objects to be heated such as food inside the heating chamber 113 . Specifically, the cooling air RF6 moves rearward from the front portion of the heating chamber 113 as shown in FIG. 10, and finally reaches the communication port 174 formed in the rear ceiling portion.

The cooling air RF6 is introduced from the communication port 174 into the exhaust duct 102 extending horizontally rearward. At the stage of exiting the exhaust duct 102, the cooling air RF6 joins so as to be attracted by the ascending current of the cooling air RF5 and is discharged from the exhaust port 20 into the room.

Even if the cooling airflow RF5 and the cooling airflow RF6 had the same initial airflow volume, the cooling airflow RF5 had a higher air velocity when discharged from the duct 102 due to the difference in paths as in the first embodiment. . Therefore, it has the effect of inducing the cooling air RF5 emitted from below.

An exhaust fan may be provided in the middle of the exhaust duct 102 in order to forcibly discharge the cooling airflows RF5 and RF6 from the exhaust duct 102 . In the first embodiment, since such an exhaust fan is omitted, it can be realized at a low cost and is advantageous in considering the arrangement of parts inside the upper unit 100. FIG.

(Basic operation of oven heating cooking)
Next, in the heating cooker 1 according to Embodiment 1, the basic operation of the oven heating device 140 will be described.

When the main power switch 97 is turned on, the integrated control device MC presumes that some cooking will start and preliminarily starts. Therefore, even if induction heating cooking or microwave heating cooking is not actually performed in the upper unit 100, oven heating cooking can be started as it is. However, once the main power switch 97 is turned off, the main power switch 97 must first be turned on to start oven cooking.

Next, the door 114 is opened to put the object to be cooked such as food into the heating chamber 113, and then a cooking menu using the heating chamber 113 is selected in the central operation section 40M of the input operation section 40. FIG. For example, in the case of grilling fish or meat, the heating time and heat power are set. However, when the menu for automatically grilling is selected, the heating power is automatically set by the heating chamber control unit 159 .

The heating chamber control unit 159 receives a command signal from the integrated controller MC, and controls the presence or absence of energization of the upper heater 163A and the lower heater 163B, the energization time period, the energization pattern (intermittent heating), thermal power, and the like.

The temperature sensor TS1 detects the temperature in the heating chamber 113 with an infrared signal and transmits the detected temperature data to the heating chamber control section 159 . The heating chamber control unit 159 checks the difference between the target temperature and the detected temperature and controls the energization of both or one of the upper heater 163A and the lower heater 163B.

Also, when the control method for timer cooking is input from the central operation unit 40M, both or one of the upper heater 163A and the lower heater 163B is energized for the set time. That is, the heating chamber control unit 159 does not control energization based on the temperature data detected by the temperature sensor TS1.

After the door 114 is closed, when the central operation unit 40M of the input operation unit 40 issues an instruction to start cooking by heating in the oven (heating chamber 113), the integrated controller MC instructs the microwave heating control unit 130 to A drive command is issued to start the operation of the third cooling fan 128 and the fourth cooling fan 129 . Alternatively, the heating chamber controller 159 may directly output a drive command signal to the third cooling fan 128 and the fourth cooling fan 129 .

When the third cooling fan 128 is operated, air is sucked into the case A150 from the air intake F152F formed in the bottom plate 101U of the lower case 101. As shown in FIG. However, unlike microwave cooking, the inverter circuit board 121 does not generate heat. Therefore, the cooling air RF5 enters the communication port B138B and the communication port A138A without cooling the inverter circuit 121 substrate.

Then, the cooling air RF5 that has passed through the communication port A138A is blown into the heating chamber 113 through the gap between the outer shell case of the temperature sensor 160 and the rim of the mounting hole through the detection window 161 .

On the other hand, the cooling air RF5 that has passed through the communication port A138A is guided to the passage 172. As shown in FIG. Then, while cooling the upper case 169, it reaches the communication port 173 and is thereafter introduced into the exhaust duct 102 (see FIG. 10).

On the other hand, the cooling air RF6 from the fourth cooling fan 129 passes through the heat radiation part 122 of the magnetron 122 and reaches the inside of the duct 153 . However, since magnetron 122 is not driven, it does not generate heat. Therefore, the cooling air RF6 enters the gap GP5R with almost no temperature rise.

The cooling air RF6 is introduced into the heating chamber 113 from the inlet 201 as shown in FIG. Therefore, the cooling air RF6 reaches the inner portion of the door 114 .

Cooking objects such as food placed in the heating chamber 113 may generate steam, oily smoke, etc. due to radiant heat from the upper heater 163A or the lower heater 163B. Such water vapor, soot, and the like are carried to the communication port 174 by the cooling air RF6 moving rearward from the front portion of the heating chamber 113 as shown in FIG.

After that, the cooling air RF6 is introduced from the communication port 174 into the exhaust duct 102 extending horizontally rearward. After exiting the exhaust duct 102, the cooling air RF6 passes through the air outlet 20 and is discharged into the room while being attracted by the cooling air RF5 rising upward.

In the first embodiment described above, after the main power switch 97 is turned on, the integrated control device MC checks the overall condition of the heating cooker 1 up to a certain stage, and then temporarily switches the left operation unit 40L or the right operation unit 40R. was operated, the subsequent induction heating control was entrusted to the controller 90 . However, the range controlled by the integrated control device MC may be changed with the control device 90 .

Similarly, the range controlled by the integrated controller MC may be changed between the heating chamber controller 159 and the microwave heating controller 130 .

For example, after the selection of any cooking menu from induction heating, microwave heating, or oven (heating chamber) heating, any one of the control device 90, the heating chamber control unit 159, or the microwave heating control unit 130 performs basic It is also possible to perform a control operation related to heating.

In that case, when a new input is performed by the input operation unit 40 (including heating stop), the control is temporarily performed by the integrated control device MC, but when the input is not performed, the control device 90 , the heating chamber control unit 159 or the microwave heating control unit 130 to execute cooking.

A specific example will be described below with reference to FIG.
FIG. 25 is a flow chart illustrating the operation of the control device 90 when fried food cooking (automatic), which is a type of induction cooking, is performed in the heating cooker 1 .

When "fried food (automatic cooking)" is selected in the induction heating cooking menu, the temperature of the cooking oil put in the pot is monitored by the temperature detection circuit 93, and the IH coils 17L and 17R are automatically controlled. Firepower is controlled.

When the user selects the fried food cooking (automatic) control mode, the control device 90 sequentially executes a preheating process, a fried food cooking process, and a heating power increasing process, as shown in FIG. Further, on the display screen of the central display section 30, necessary information and reference information (for example, estimated time required for preheating, etc.) appear in the form of characters, graphics, or the like. Also displayed is the fact that the priority cooking is for which the power is not restricted (suppressed) by the power control unit 72 .

For this reason, the user can recognize that electric power is preferentially secured during cooking of the fried food even if microwave heating or oven heating is used.

In the preheating process, when the target oil temperature set by the user is 180° C., the inverter circuit 81R (or 81L) is driven at a predetermined thermal power value (maximum 1500 W) in the preheating process, and the oil temperature rapidly increases. rises from the room temperature (for example, 20°C) to the target temperature T1 of 180°C.

Since this temperature rise is monitored in real time by the temperature detection circuit 93, when the temperature detection circuit 93 detects that the target temperature T1 (first temperature) has reached 180° C., the control device 90 adjusts the amount of induction heating, that is, the output of the inverter, to maintain the target temperature (based on such temperature detection information, the operation of automatically adjusting the high-frequency thermal power to approach the target temperature is described below. , referred to as “temperature feedback control”).

After that, a display request command is issued to the integrated control unit MC, and a voice guidance is given to the user via the voice synthesizer 95, such as "The temperature of the oil has reached a suitable temperature. Please insert ingredients."

When a user puts an ingredient, for example a frozen croquette, into the oil, the oil is rapidly cooled by the cold ingredient from the time of putting it in, so the temperature drops sharply as shown in FIG. However, since the temperature detection circuit 93 monitors the movement of such a temperature drop, the heating power of the inverter circuit 81R (81L) is immediately raised to the predetermined heating power of 1500 W or 1800 W, and the oil temperature rises again. (temperature feedback control). In this way, when the target temperature T1 is reached again (or after a predetermined time has elapsed), the frying process is immediately shifted to the heating power increasing process.

In the thermal power-up process, control is performed so that the oil temperature is maintained between a second temperature T2 higher than the target temperature T1, which is 225°C, and an even higher upper limit temperature (third temperature) T3, which is 230°C. Device 90 controls inverter circuit 81R (81L).

As shown in FIG. 25, the thermal power value is intermittently driven at about 900W. The process after reaching the third temperature T3 is called a "fried food finishing process", and is an important process for finishing the fried food crispy. If a sufficient amount of heat is not applied in the heat-increasing process, the fried food cannot be fried well. Since the frying process is not restricted within a predetermined time, the frying process is completed when the user presses the input key 44R (or the input key 45L).

As shown in FIG. 25, in the (automatic) fried food cooking control mode, the period from the fried food cooking process to the heating power increasing process is defined as the "execution time period of the priority cooking menu". Power reduction is prevented by starting the heating source or changing operating conditions. In other words, the induction heating control device 90 always grasps whether or not the cooking menu being executed is in the "execution time period of the priority cooking menu", and if it is in the execution time period, It has a function to notify the outside.

As is clear from the above description, when a specific control mode is entered, the integrated control device MC does not issue a control signal to the control device 90 each time, and the entire control mode from start to completion is executed in that mode. It is entrusted to the control of the control device 90.

As is clear from the above description, the heating cooker of Embodiment 1 has the following configuration. i.e.
an upper unit 100 having an induction heating source 17 for heating an object to be heated and supported by the kitchen furniture 2;
A lower unit 200 attached to the upper unit 100 and containing a heating chamber 113,
The lower unit 200 is provided with a microwave heating device 120 that supplies microwaves to the heating chamber 113 and an oven heating device 140 that heats the heating chamber 113,
The upper unit 100 includes an integrated control device MC that centrally controls the induction heating source, the microwave heating device 120 and the oven heating device 140,
The upper unit 100 includes induction heating circuits 94L and 94R controlled by the integrated controller MC, a filter circuit board 54 mounted with a filter circuit for receiving power from a commercial power supply 99, and a and an inverter circuit board 80 on which a (first) inverter circuit 81 that receives power is mounted,
The lower unit 200 receives electric power from the microwave heating control section 130 of the microwave heating device 120, the heating chamber control section 159 of the oven heating device 140, and the filter circuit board 54 (second). arranging the inverter circuit board 121A,
From the filter circuit of the upper unit 100, power for the heating sources of the control section 130 of the microwave heating device and the oven heating device 140 is supplied.

Therefore, according to this configuration, the upper unit 100 and the lower unit 200 are provided with three kinds of heat sources, so that a wider range of combined cooking can be performed than before.
In addition, centralized control by the general control device MC allows the inverter circuit boards arranged in the upper unit 100 and the lower unit 200 to be linked, and the heating power is distributed to the three heating sources from the filter circuit of the upper unit. In addition, it is possible to provide a heating cooker that can reduce the return of noise to the commercial power supply side.

Furthermore, the heating cooker of this Embodiment 1 was the following structures. i.e.
an upper unit 100 having an induction heating source 17 for heating an object to be heated and supported by the kitchen furniture 2;
A lower unit 200 attached to the upper unit 100 and containing a heating chamber 113,
The lower unit 200 is provided with a microwave heating device 120 that supplies microwaves to the heating chamber 113 and an oven heating device 140 that heats the heating chamber 113,
The upper unit 100 includes an integrated control device MC that centrally controls the induction heating source 17, the microwave heating device 120, and the oven heating device 140,
In the upper unit 100, induction heating circuits 94L and 94R controlled by the integrated control device MC, a power supply circuit board 55 for receiving power from a commercial power supply 99, and an inverter equipped with a (first) inverter circuit 81 are mounted. a circuit board 80;
The lower unit 200 is provided with a microwave heating control section 130 of the microwave heating device 120, a heating chamber control section 159 of the oven heating device 140, and a (second) inverter circuit board 121,
The power supply circuit board 55 is arranged downstream of the cooling air passage (first air passage F1) of the cooling fan 60 that cools the (first) inverter circuit 81,
The control unit 130 of the microwave heating device and the oven heating device 140 are configured to supply power for their heating sources from the filter circuit board 54 of the upper unit 100 .

Therefore, according to this configuration, the upper unit 100 and the lower unit 200 are provided with three kinds of heat sources, so that a wider range of combined cooking can be performed than before.
In addition, centralized control by the general control device MC allows the inverter circuit boards 80 and 121 arranged in the upper unit 100 and the lower unit 200 to be linked.
Further, the filter circuit board 54 is branched to distribute heating power to three heating sources, and the filter circuit board 54 is located downstream of the cooling air passage (first air passage F1) of the first cooling fan 60. is arranged, overheating of the filter circuit board 54 can also be prevented.

Furthermore, the heating cooker of this Embodiment 1 was the following structures. i.e.
an upper unit 100 having an induction heating source 17 for heating an object to be heated and supported by the kitchen furniture 2;
A lower unit 200 attached to the upper unit 100 and containing a heating chamber 113,
The lower unit 200 is provided with a microwave heating device 120 that supplies microwaves to the heating chamber 113 and an oven heating device 140 that heats the heating chamber 113,
The upper unit 100 includes an integrated control device MC that centrally controls the induction heating source 17, the microwave heating device 120, and the oven heating device 140,
In the upper unit 100, induction heating circuits 94L and 94R controlled by the integrated controller MC, a power supply circuit board 55 for receiving power from a commercial power supply 99, and an inverter equipped with a (first) inverter circuit 81 are mounted. a circuit board 80;
In the lower unit 200, a microwave heating control unit 130 of the microwave heating device 120, a heating chamber control unit 159 of the oven heating device 140, and a (second) inverter circuit board 121 are arranged,
The power supply circuit board 55 is arranged downstream of the cooling air passage (first air passage F1) of the cooling fan 60 that cools the (first) inverter circuit 81,
The control unit 130 of the microwave heating device and the oven heating device 140 are connected to the power supply circuit board 55 provided on the downstream side (non-commercial power supply side) of the filter circuit board 54 of the upper unit 100. It is configured to supply low-voltage power.

Therefore, according to this configuration, since the upper unit 100 and the lower unit 200 are provided with three types of heat sources, it is possible to perform a wider range of combined cooking than in the past.
In addition, centralized control by the general control device MC allows the inverter circuit boards 80 and 121 respectively arranged in the upper unit 100 and the lower unit 200 to be linked.
Further, the power supply circuit board 55 is configured to distribute power at a prescribed low voltage to the control devices 90, 130, and 159 of the three heating sources, and the cooling air passage of the first cooling fan 60 (first air passage) Since the power supply circuit board 55 is arranged on the downstream side of F1), overheating of the power supply circuit board 55 can be prevented, and stable power can be supplied to the control device 90 and the like.

Summary of Embodiment 1.
As is clear from the above description, the heating cooker 1 of Embodiment 1 has the configuration of the first invention.
That is, the heating cooker 1 in this Embodiment 1 is
It has a flat body 10 with a top plate 15 on which an object to be heated is placed,
Inside the main body, IH coils 17L and 17R for heating the object on the top plate 15, an inverter circuit board 80 arranged below the coils 17L and 17R, and the IH coils 17L and 17R. A cover 70 installed between the inverter circuit board 80 and a first cooling fan 60 that introduces cooling air from the outside of the main body,
The first cooling fan 60 has rotary blades that rotate about a vertical axis, and faces the entrance of the first air passage F1 formed between the inverter circuit board 80 and the cover 70. ,
The first cooling fan 60 supplies the first cooling air RF1 from the inlet FI at one end of the first air passage F1 toward the outlet FO at the other end. be.

Due to this configuration, the IH coil installation space CK and the installation space of the inverter circuit board 80 are divided vertically by the cover 70, and the inverter circuit board 80 can be effectively cooled.

The heating cooker 1 of Embodiment 1 has the configuration of the second invention.
That is, the heating cooker 1 in this Embodiment 1 is
It has a flat body 10 with a top plate 15 on which an object to be heated is placed,
Inside the main body, a left IH coil 17L and a right IH coil 17R are arranged at two positions on the left and right sides for heating the object to be heated on the top plate 15, and a coil common to these two IH coils. and an inverter circuit board 80 arranged below the IH coils, a cover 70 installed between the two IH coils and the inverter circuit board 80, and installed near the left wall surface of the main body, a first cooling fan 60 that introduces cooling air from vent holes formed in the housing,
The cover 70 is installed in series from the first cooling fan 60 to the right side of the bottom of the left IH coil 17L,
The first cooling fan 60 has rotary blades that rotate about a vertical axis, and faces an inlet FI of a first air passage F1 formed between the inverter circuit board 80 and the cover 70. ,
The first cooling fan 60 supplies the first cooling air FR1 from the inlet FI at the left end of the first air passage F1 toward the outlet FO at the right end,
An exhaust window 52A through which the first cooling air FR1 emitted from the first air passage F1 is introduced after passing through the upper space of the cover 70 is provided at the inner rear part of the main body 10,
The formation position of the exhaust window 52A is on the left side of the position of the exit FO of the first air passage F1.

Due to this configuration, the IH coil installation space CK and the installation space of the inverter circuit board 80 are divided vertically by the cover 70, and the inverter circuit board 80 can be effectively cooled. Moreover, the cooling air RF1 coming out of the air passage F1 flows in a straight line from the left side to the right side, advances to the upper space of the cover 70 before reaching just below the right IH coil 17R, and reaches the upper right IH coil 17R. Cooling the coil 17R, it advances to the exhaust window 52A provided at a position far from this position.
Therefore, the left and right IH coils 17L, 17 can be cooled without guiding the cooling air with a special guide plate or the like.

The heating cooker 1 of Embodiment 1 has the configuration of the third invention.
That is, the heating cooker 1 in this Embodiment 1 is
It has a flat body 10 with a top plate 15 on which an object to be heated is placed,
Inside the main body, there are provided IH coils 17L and 17R for heating the object on the top plate 15, an inverter circuit board 80 arranged below the IH coils 17L and 17R, and the IH coils 17L and 17R. and the inverter circuit board 80, a first cooling fan 60 and a second cooling fan 61 for introducing cooling air from the outside of the main body 10, and a user's operation input An input operation unit 40 that accepts,
The first cooling fan 60 has rotary blades that rotate about a vertical axis,
The first cooling fan 60 faces the inlet FI of the first air passage F1 formed between the inverter circuit board 80 and the cover 70. The first cooling air FR1 is supplied from the inlet FI at one end of F1 toward the outlet FO at the other end,
The second cooling fan 61 is positioned closer to the input operation unit 40 than the first cooling fan 60 and is configured to supply the input operation unit 40 with the second cooling air FR2.

Due to this configuration, the inverter circuit board 80 below the IH coil installation space CK can be effectively cooled by the first cooling fan 60 . Also, the input operation unit 40 can be cooled by the second cooling fan 61 .

The heating cooker 1 of Embodiment 1 has the configuration of the fourth invention.
That is, the heating cooker 1 in this Embodiment 1 is
It has a flat body 10 with a top plate 15 on which an object to be heated is placed,
Inside the main body 10, there are an IH coil for heating the object on the top plate 15, an inverter circuit board 80 arranged below the IH coil, and an inverter circuit board 80 between the IH coil and the inverter circuit board. A cover 70 installed in the main body, a first cooling fan that introduces cooling air from the outside of the main body, and a power circuit board 55 that receives power from a commercial power source and generates the necessary power,
The first cooling fan 60 has rotary blades that rotate about a vertical axis,
The first cooling fan 60 faces the entrance of the first air passage F1 formed between the inverter circuit board 80 and the cover 70. The first cooling air FR1 is supplied from the inlet at one end of the to the outlet at the other end,
The power circuit board 55 is arranged on the opposite side of the first cooling fan 60 with the cover 70 interposed therebetween.

Due to this configuration, the inverter circuit board 80 below the IH coil installation space CK can be effectively cooled by the cooling air RF1 from the first cooling fan 60 . In addition, the cooling air RF1 that has cooled the inverter circuit board 80 reaches the power circuit board 55 in the traveling direction, so that the electrical components 85 mounted on the power circuit board 55 can be cooled.

The heating cooker 1 of Embodiment 1 has the configuration of the fifth invention.
That is, the heating cooker 1 in this Embodiment 1 is
It has a flat body 10 with a top plate 15 on which an object to be heated is placed,
Inside the main body, an IH coil for heating an object on the top plate, an inverter circuit board 80 arranged below the IH coil, and an inverter circuit board 80 installed between the IH coil and the inverter circuit board. and a first cooling fan 60 that introduces cooling air from the outside of the main body,
The first cooling fan has a rotor that rotates about a vertical axis,
The first cooling fan has an intake port on the bottom surface of the fan case and an outlet port for blowing cooling air on the side surface,
A first air passage F1 formed below the cover 70, a heat sink 82 arranged on the upper surface of the inverter circuit board 80, and the heat sink on a first horizontal plane HP1 crossing the upper and lower centers of the air outlet. and a power control switching element 93 attached to 82, respectively,
An exhaust window 52A for discharging the air after passing through the IH carp 17L, 17R is arranged on the second horizontal plane HP2 above the first horizontal plane HP1.

Due to this configuration, the heat sink 82 of the inverter circuit board 80 can be effectively cooled by the cooling air RF1 horizontally flowing from the first cooling fan 60 . The cooling air RF1 that has cooled the inverter circuit board 80 travels upward, reaches the IH coils 17L and 17R, and reaches the horizontal exhaust window 52A, so that the IH coils 17L and 17R can also be cooled.

The heating cooker 1 of Embodiment 1 has the configuration of the sixth invention.
That is, the built-in combined heating cooker 1 in this Embodiment 1 is
It is installed in the kitchen furniture,
an upper unit 100 having a first heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed and supported by the kitchen furniture 2;
a lower unit 200 having a heating chamber 113 installed below the upper unit 100 and having a front opening closed by a door 114 so as to be openable and closable;
The lower unit 200 includes a microwave heating device 120 for supplying microwaves to the heating chamber 113, an oven heating device 140 for heating the heating chamber, a cooling fan 128 for cooling the microwave heating device, 129 and
The microwave generation source 122 of the microwave heating device 120 is arranged along one of the left and right side walls of the heating chamber 113, and the oscillation part 122A of the microwave generation source 122 is arranged on the back surface of the heating chamber 113. It is installed horizontally so that it protrudes to the side,
On the back side of the heating chamber 113, a feed port 180 leading to the inside of the heating chamber 113 and an antenna case 124 into which the microwave from the microwave generation source 122 is introduced are provided,
In the antenna case 124, a rotatable antenna 125 is arranged for propagating the microwave oscillated from the microwave generation source 122 to the space in the heating chamber 113 through the feeding port 180. It is a configuration that

Due to this configuration, the magnetron 122 and the antenna case 124 of the microwave heating device 120 can be installed in series in the space from one side wall surface (right side surface) of the heating chamber 113 to the back side, and the inner space is narrow. These devices can be incorporated in the lower unit 200 of the.

The heating cooker 1 of Embodiment 1 has the configuration of the seventh invention.
That is, the built-in combined heating cooker 1 in this Embodiment 1 is
It is installed in the kitchen furniture 2,
an upper unit 100 having an induction heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed and supported by the kitchen furniture 2;
a lower unit 200 having a heating chamber 113 installed below the upper unit 100 and having a front opening closed by a door 114 so as to be openable and closable;
The lower unit 200 includes a microwave heating device 120 that receives power from the upper unit 100 and supplies microwaves to the heating chamber 113, an oven heating device 140 that heats the heating chamber 113, and the microwave oven. cooling fans 128, 129 for cooling the wave heating device 120;
The microwave generation source 122 of the microwave heating device 120 is arranged along one right wall surface or left wall surface of the heating chamber 113, and the oscillation part 122A of the microwave generation source 122 is located on the back side of the heating chamber 113. installed horizontally so as to protrude into the
An antenna case 124 into which microwaves from the microwave generation source 122 are introduced is provided on the back side of the heating chamber 113,
In the antenna case 124, microwaves oscillated from the microwave generation source 122 are transmitted to the space in the heating chamber 113 through a feeding port 180 provided on the back surface of the heating chamber 113. arranging the antenna 125 to be rotated,
The operation of the induction heating source 17, the microwave heating device 120, the oven heating device 140, and the cooling fans 128 and 129 is controlled by an integrated controller MC on the upper unit 100 side. is.

Due to this configuration, the microwave oscillator (magnetron 122) of the microwave heating device 120 and the antenna case 124 are installed in series in the space on the back side from one side wall surface (right side surface) of the heating chamber 113. It is possible to incorporate these devices in the lower unit 200 having a narrow internal space.

Furthermore, since the integrated controller MC controlling the induction heating source 17 centrally controls the microwave heating device 120, the oven heating device 140, the third cooling fan 128 and the fourth cooling fan 129, each It is possible to provide the built-in composite cooking device 1 in which the heat sources are reliably linked.

The heating cooker 1 of Embodiment 1 has the configuration of the eighth invention.
That is, the built-in combined heating cooker 1 in this Embodiment 1 is
It is installed in the kitchen furniture 2,
an upper unit 100 having an induction heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed and supported by the kitchen furniture 2;
a lower unit 200 having a heating chamber 113 installed below the upper unit 100 and having a front opening closed by a door 114 so as to be openable and closable;
The lower unit 200 includes a microwave heating device 120 that receives power from the upper unit 100 and supplies microwaves to the heating chamber 113, and an oven heating device 140 that heats the heating chamber 113. ,
The microwave heating device 120 includes a microwave heating control unit 130, a microwave generation source 122, and a first inverter circuit board 121 that supplies high-frequency power to the microwave generation source 122,
The oven heating device 140 includes a heating chamber control unit 159,
The microwave generation source 122 and the first inverter circuit board 121 are arranged along one side wall surface of the heating chamber 113 and separated in the front-rear direction,
Air is sucked from the outside of the lower unit 200 below the first inverter circuit board 121 and below the heat radiating portion 122H of the microwave generation source 122, and the air is supplied to the first inverter circuit. A front-side cooling fan 128 and a rear-side cooling fan 129, which are individually supplied to the substrate 121 and the heat radiating portion 122H, are arranged.

Due to this configuration, the microwave oscillator (magnetron 122) of the microwave heating device 120 and the inverter circuit board 121 are built into the lower unit 200 of the narrow internal space on one side wall surface (right side surface) of the heating chamber 113. can be made

Furthermore, since the front side (third) cooling fan 128 and the rear side (fourth) cooling fan 129 for individually cooling the heat radiating section 122H and the inverter circuit board 121 are arranged, Overheating of the microwave heating device 120 can be prevented.

The heating cooker 1 of Embodiment 1 has the configuration of the tenth aspect of the invention.
That is, the built-in combined heating cooker 1 in this Embodiment 1 is
It has a first heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed, and a flat main body 10 whose upper surface opening is closed by the top plate 15. an upper unit 100 supported by kitchen furniture;
A heating chamber 113 to which microwaves are supplied, and a lower unit 200 in which a microwave generation source 122 is built in the lower case 101,
The upper case 16 and the lower case 101 constituting the outer shell of the main body 10 are each made of a thin metal plate,
Side vertical walls 16L and 16R extending vertically are formed at the peripheral end of the upper case 16,
The upper surface of the lower case 101 is entirely open, and the upper unit 100 and the lower unit 200 are connected to each other while the upper case 16 is fitted inside the opening.

Due to this configuration, the upper case 101 and the lower case 101 are strengthened as an integral structure by two means of fitting and coupling. Therefore, even if the structure is made of a thin metal plate and is light in weight, it is possible to maintain a highly reliable housing structure that can withstand long-term use. The term "fitting" as used in the first embodiment means that the outer dimension of the upper case 16 to be inserted inside may differ by several millimeters from the inner dimension of the lower case 101, which is the outer side. It does not have to be in a state of being in close contact with the whole. Moreover, if there is almost no dimensional difference, it may be difficult to insert the upper case 16 into the upper opening of the lower case 101 during assembly.

The heating cooker 1 of Embodiment 1 has the configuration of the eleventh aspect of the invention.
That is, the built-in combined heating cooker 1 in this Embodiment 1 is
A top plate 15 on which an object to be heated is placed, an induction heating source 17 for heating the object to be heated through the top plate 15, and a flat upper case whose top opening is closed by the top plate 15. 16, the upper unit 100 supported by the kitchen furniture 2;
A heating chamber 113 to which microwaves are supplied, and a lower unit 200 in which a microwave heating device 120 is built in a lower case 101,
In the state where the upper case 16 is placed on the lower case 101 , the bottom wall of the upper case 16 also serves as the ceiling surface of the lower case 101 .

This configuration eliminates the need for a special partition plate for covering the ceiling of the lower case 101, a cover plate, and other structures, thereby significantly reducing the manufacturing cost and reducing the weight.
In addition, directly below the rear of the upper case 101, a cavity 104 having a large planar dimension and a large depth dimension BH is formed behind the heating chamber 113. In this cavity, a waveguide 123 and a power supply circuit board are formed. 127 (including the microwave heating control 130 and the circuit board of the heating chamber control 159).

Furthermore, when the cavity 104 is located directly below the filter substrate circuit 54 as shown in FIG. 7, the cavity 104 can be used when the external commercial AC power supply 99 is drawn into the heating cooker 1 with a power cord. Convenient.

(Other features)
In the configuration of the first embodiment, various practical effects and merits can be expected as follows.
(1) When the case A 150 and the case B 151 constituting the microwave heating device 120 are arranged in a straight line in the front-rear direction as shown in FIG. , RF6 can be easily and compactly realized.
(2) A structure in which the third cooling fan 128 and the fourth cooling fan 129 are arranged in a straight line in the front-rear direction and are adjacent to each other as shown in FIG. 7 to guide two independent cooling airflows RF5 and RF6. can be realized easily and compactly.
(3) Important parts such as case A 150 and case B 151, magnetron 122, latch switch 132A of closing detection unit 139 of door 114, door switch 132B, etc., which constitute microwave heating device 120 are placed on the right side of heating chamber 113. Since these parts are integrated, when inspection or repair of these parts becomes necessary, they can be handled only by the right side of the lower case 101, which is convenient. For example, if the side vertical wall 101R constituting the right outer shell of the lower case 101 is removed, the entirety of each of the above parts is exposed, and workability such as maintenance and inspection can be easily performed.

Embodiment 2.
26 to 54 show a cooking device according to Embodiment 2. FIG. The second embodiment is characterized in that the strength of the heating cooker 1 is increased by devising the connecting structure of the upper unit 100 and the lower unit 200 . 1 to 25 are given the same reference numerals, and redundant description may be omitted.

FIG. 26 is a perspective view of a built-in induction heating cooker according to Embodiment 2 of the present invention before being installed on kitchen furniture. 27 is a perspective view showing a state in which the door is opened in the induction heating cooker shown in FIG. 26. FIG. 28 is a front view of the induction heating cooker shown in FIG. 26. FIG. 29 is a plan view of the induction heating cooker shown in FIG. 26. FIG. 30 is a right side view of the induction heating cooker shown in FIG. 26. FIG.

31 is a left side view of the induction heating cooker shown in FIG. 26. FIG. 32 is a back (rear) view of the induction heating cooker shown in FIG. 26. FIG. 33 is a bottom (lower) view of the induction heating cooker shown in FIG. 26. FIG. 34 is a longitudinal sectional view taken along the line ZZ of the induction heating cooker shown in FIG. 29. FIG. 35 is a longitudinal sectional view of the induction heating cooker shown in FIG. 29, taken along the line YY. FIG. 36 is a vertical cross-sectional view of the induction heating cooker shown in FIG. 29 taken along the line YY, showing a state in which the door is opened. FIG. 37 is a vertical cross-sectional view of the induction heating cooker shown in FIG. 29 taken along the line XX. 38 is a perspective view showing the entire upper unit in the induction heating cooker shown in FIG. 26. FIG. 39 is a perspective view of the upper unit of the induction heating cooker shown in FIG. 26 with the top plate removed. FIG.

40 is a perspective view of the upper unit of the induction heating cooker shown in FIG. 26 with the top plate and the IH coil removed. 41 is a perspective view of the upper unit of the induction heating cooker shown in FIG. 26 with the top plate, IH coil and cover removed. 42 is a reference perspective view showing the flow of cooling air in FIG. 41. FIG. 43 is a plan view, a front view, a right side view and a rear view of the upper unit in the induction heating cooker shown in FIG. 26. FIG. 44 is a plan view, a front view, a right side view and a rear view of the upper unit shown in FIG. 26 with both the top plate and the IH coil removed. 45 shows a plan view, a front view, a right side view and a rear view of the upper unit shown in FIG. 26 with the top plate, IH coil and cover removed. 46 is a bottom (lower) view of the upper unit of the induction heating cooker shown in FIG. 26. FIG. 47 is a longitudinal sectional view taken along the line XX of the upper unit shown in FIG. 43. FIG. 48 is a longitudinal sectional view taken along the line XX of the upper unit shown in FIG. 43. FIG. 49 is a longitudinal sectional view taken along the line ZZ of the upper unit shown in FIG. 43. FIG.

50 is a perspective view 1 showing an exploded state of the induction heating cooker shown in FIG. 26. FIG. 51 is a perspective view 2 showing an exploded state of the induction heating cooker shown in FIG. 26. FIG. 52 is a perspective view of a connecting member (reinforcing member) of the induction heating cooker shown in FIG. 26. FIG. 53 is a perspective view showing an intermediate stage of disassembly of the lower unit of the induction heating cooker shown in FIG. 26. FIG. FIG. 54 is a cross-sectional view for explaining the main part of the lower unit of the induction heating cooker shown in FIG. 26. FIG.

A description will be given with reference to the drawings, focusing on points that are particularly different from the first embodiment.
In FIG. 26, reference numeral 118 denotes a connecting member for integrating the upper unit 100 and the lower unit 200, which is also called a "reinforcing member" because it also has the purpose of reinforcement.

The connecting member 118 has a shape shown in FIG. 52 so as to continuously cover the lower unit 200 from the right side to the lower side and further to the left side. That is, 118R is a right vertical portion closely overlapping with the right side of the front portion of the lower unit 200, 118L is a left vertical portion closely overlapping with the left side of the front portion of the lower unit 200, and 118M is the right vertical portion. It is a central flat portion that is continuously formed in the portion 118R and the left vertical portion 118L. The central flat portion 118M is a portion that overlaps the lower surface of the bottom plate 101U in the front portion of the lower case 101 in close contact.

The connecting member 118 is formed by pressing a thin metal plate (for example, 1 mm thick) to integrally form the right vertical portion 118R, the central flat portion 118M and the right vertical portion 118L.

Denoted at 118P are recesses or protrusions integrally formed by a press working die during press working of the connecting member 118. As shown in FIG. formed one by one. The concave or convex portion 118P is formed for the purpose of increasing the mechanical strength of the connecting member 118. As shown in FIG.

In FIG. 27, 116 is a metal arm that horizontally supports the door 114 and pulls the door 114 in the door closing direction when the door 114 is closed. The arm 116 is guided by a through hole (guide hole) 117 formed in the front plate 101F of the lower case 101 and moves in the through hole 117 in the front-rear direction. The door structure of the high-frequency heating device using the arm 116 is introduced, for example, in Japanese Patent Application Laid-Open Nos. 2002-39541, 2010-181106 and 2007-218544, etc., so a detailed description will be given. are omitted.

In FIG. 27, reference numeral 176 denotes a pair of left and right hinges that support the door 114 so that the lower case 101 can rotate. Therefore, the door 114 opens and closes using the hinge 176 as a fulcrum. The pair of left and right arms 116 are supported from below by a roller (not shown) or a sliding member (not shown) provided rotatably on the back side of the through hole 117 so that the door 114 can be opened and closed. At times, the arm 116 moves back and forth while contacting the upper surface of the roller or slide member.

Front covers 112 are provided on the left and right sides of the front surface of the lower unit 200 , and project laterally beyond the width of the lower case 101 . When the heating cooker 1 is installed on the kitchen furniture 2, the front cover 112 fills the gap with the kitchen furniture 2 as much as possible.

Reference numeral 198 denotes a metal support fitting, which has a length covering the entire lateral width of the lower case 101, as shown in FIG. Reference numeral 198H denotes a horizontal portion overlapping the upper shielding plate 197 so as to be in close contact therewith, and 198V denotes a vertical portion formed by vertically bending the rear end portion of the horizontal portion 198H. The support bracket 198 is thus composed of a horizontal portion 198H and a vertical portion 198V.

A fixed portion 198R is formed by bending the right end portion of the horizontal portion 198H of the support fitting 198 downward. As shown in FIG. 31, the support fitting 198 has a fixing portion 198L formed by bending the left end portion of the horizontal portion 198H downward. These two fixing portions 198L and 198R are in close contact with the upper edge of the connecting member 118 so as to hold the upper edge of the connecting member 118 from the outside. The connecting member 118 is fixed to the front horizontal wall 101T of the lower case 101 with screws 186 at a total of four locations.

In FIG. 27, 101RP is a projection formed integrally with the side vertical wall 101R of the lower case 101. As shown in FIG. The convex portion is formed by pressing the side vertical wall 101R from the inside to the outside of the lower case 101, and is intended to increase the mechanical strength of the side vertical wall 101R. Similarly, the lateral vertical wall 101L of the lower case 101 also protrudes outward over a certain area to form a convex portion 101LP (see FIG. 31).

In FIG. 29, L1 indicates the width dimension of the end portion 102E of the exhaust duct 102. In FIG. LW indicates the width dimension of the lower space of the air-permeable exhaust cover 19 . As shown in FIG. 34, the lower part of the exhaust cover 19 is closed by a bottom plate 65. Therefore, even if foreign matter such as water enters from above the exhaust cover 19, the bottom plate 65 prevents it. .

In FIG. 29, D4 is the effective width of the top plate 15 in the front-rear direction. Note that the “effective width” refers to a dimension excluding the dimension of the outer peripheral edge covered with the decorative frame 25 or the like surrounding the top plate 15 . An effective width D4 of the top plate 15 in the front-rear direction is 413 mm.

FIG. 29 shows an example in which the width of the top plate 15 is set to 600 mm, and the actual dimensions of each part are as follows.
D5 is the maximum width of the heating cooker 1 in the front-rear direction, which is 510 mm.
W2 is the effective width of the top plate 15 in the horizontal direction, which is 580 mm.
W3 is the maximum width of the heating cooker 1 in the horizontal direction, which is 599 mm. Note that the maximum width in the horizontal direction of the upper unit and the maximum width in the horizontal direction of the lower unit 200 including the front cover 112 are the same. Incidentally, the maximum width of the exhaust cover 19 in the horizontal direction is 595 mm.

The size of the top plate 15 described above is an example, and the present invention is not limited to this example.
For example, the maximum width W3 may be changed to 650 mm, the effective width W2 to 639 mm, the longitudinal maximum width D5 to 507 mm, and the longitudinal effective width D4 to 425 mm.

30, reference numeral 187 denotes a screw for fixing the connecting member 118 to the side vertical walls 101L and 101R of the lower case 101; 16P is formed on the side vertical walls 16L and 16R and the rear vertical wall 16B of the upper case 16; (See Figures 32, 43 and 45). 148 is a screw (fixing tool) for fixing the connecting member 118 to the side vertical walls 101L and 101R of the lower case 101 as well. Reference numeral 183 denotes screws for fixing the side vertical walls 16L, 16R and the rear vertical wall 16B of the upper case 16, and the tips of the screws are fixed to screw holes (not shown) formed in the wall of the lower case 101. be done.

The portion of the claw 16P formed on the frontmost side is fixed by the screw 187 in a state of being engaged with the edge of a square or rectangular through hole (engagement hole) 118N formed in the connecting member 118. As shown in FIG.

The claws 16P formed at the intermediate position and the rear side are engaged with the rim of a square or rectangular through hole (engagement hole) 101N formed in the side vertical wall 101R of the lower case 101. It is fixed by screws 183 . The back plate 101B of the lower case 101 is also formed with the through holes 101N, and the claws 16P formed on the rear vertical wall 16B of the upper case 16 are engaged.

30 and 31, 103 is a stepped portion formed integrally with the upper end portion of the side vertical wall 101R. The side vertical wall 16R of the upper case 16 overlaps the stepped portion. As a result, the upper case 16 is reliably prevented from moving to the right. In other words, when the upper case 16 is inserted from above the lower case 101, the stepped portion 103 and the side vertical wall 101R are engaged.

Reference numeral 179 denotes a fixing bracket, and the intermediate part is fixed to a support base 179B (see FIG. 53) in the rear part of the upper unit 100 so that the rear end part can swing up and down. At the stage where the cooking device 1 is installed in the installation opening 2A of the kitchen furniture 2, by closing the "dedicated screw" housed in the support base 179B, the rear end portion of the fixing bracket 179 is lifted upward and installed. It engages the underside of mouth 2A. Thereby, the heating cooker 1 is fixed so as not to be lifted. When the "special screw" h and the exhaust cover 19 are removed, the inside of the upper case 16 can be visually observed, so that the installer can easily perform such work.

In FIG. 32, 101B is a rear plate made of a metal plate forming the rear surface of the lower case 101. As shown in FIG. A bent portion 101K is formed by bending the back plate 101B during press working, and the portion below this is the inclined portion 101C (the inclined portion 111 of the main body 110).

33, DP2 indicates the dimension from the side vertical wall 16L of the upper case 16 to the side vertical wall 101L of the lower case 101. In FIG. As is clear from FIG. 33, the side vertical wall 101L is located on the right side of the vent hole 64 of the upper case 16, avoiding the center point thereof. In the figure, the dashed line 101L indicates a lateral vertical wall, which also extends in the front-rear direction at a portion facing the upper surface of the connecting member 118. As shown in FIG.

In FIG. 33, reference numeral 131 denotes a door opening/closing detection mechanism, which is provided with the closing detection section 139 described in the first embodiment. The door opening/closing detection mechanism 131 is constructed by mounting a latch switch 132A, a door switch 132B, and the like on a support plate 137. As shown in FIG. The door opening/closing detection mechanism 131 is installed in the lower case 101 in the space between the case A150 and the front plate 101F of the lower case. The support plate 137 is fixed to both the front plate 101F and the bottom plate 101U with screws.

35 and 36, reference numeral 145 denotes a dedicated saucer used inside the heating chamber 113, and is made of highly heat-resistant plastic, porcelain, glass, or the like. The receiving tray 145 has external dimensions such that it can be inserted into and removed from the opening 113A of the heating chamber 113. As shown in FIG.

A tableware 147 is placed on the saucer 145 and is made of porcelain or a highly heat-resistant material. Reference numeral 101P denotes a reinforcing convex portion integrally formed on the wall surface of the heating chamber 113 by press working.
The tableware 147 may be made of metal if microwave heating is not used. For example, the induction heating source 17 is used to fry food (eg, hamburgers) on a frying pan (not shown) to some extent, after which the frying pan is moved into the heating chamber 113 and heated by the upper heater 163A and the lower heater 163B. Cooking may also be performed (this is a type of co-cooking).

LA is the "protrusion dimension" from the back wall (rear wall surface) 113B of the heating chamber 113 to the rear end of the antenna driving motor 126. FIG. Reference numeral 154 denotes a case C made of an electrically insulating material, and as shown in FIG. 53, it has a "box-like" shape that is long in the left-right direction and thin in the front-rear direction.

The power circuit board 127 of the microwave heating controller 130 is housed in the case C154. A control circuit board (not shown) of the heating chamber control section 159 may be stored.

As shown in FIG. 35, a slight gap GP11 is secured between the rear end of the antenna driving motor 126 and the case C154. 35 and 36, the outer shell of the case C is indicated by broken lines.

A sheet or plate-like heat insulating material 175A (not shown) is arranged in the gap GP6. Similarly, a sheet or plate-like heat insulating material 175B (not shown) is arranged in the gap GP8.

FIG. 39 shows a state in which the top plate 15 is removed. In FIG. 39, 30W is a display window, which is formed on the operation board 41 at a position corresponding to the central display section 30. As shown in FIG.

31LW and 31RW are display windows. The display windows are formed on the operation board 41 at positions corresponding to the left display section 31L and the right display section 31R, respectively.

A choke coil 56 is one of the important electrical components in the filter circuit board 54 . 17C is a coil base (coil support frame) on which two IH coils 17L and 17R are mounted.

The coil base 17C is integrally made of a highly heat-resistant plastic material. The coil base 17C has a circular shape as a whole, matching the shape of the IH coils 17L and 17R, and has a plurality of arms 17CH radially extending from the center. In this second embodiment, there are eight arms 17CH. A gap serving as a large ventilation space is formed between each arm 17CH.

17F is a ferrite plate placed between two adjacent arms 17CH. In the left IH coil 17L, TS3 is a contact temperature sensor such as a thermistor.
One temperature sensor TS3 is installed at the center of the IH coil 17L. The other two temperature sensors TS3 are installed at positions outside the IH coil 17L, slightly away from the center.

TS5 is a non-contact temperature sensor, such as an infrared sensor. In the right IH coil 17R, TS4 is a contact temperature sensor such as a thermistor. One temperature sensor TS4 is installed at the center of the IH coil 17R. The other two temperature sensors TS4 are installed at positions outside the center of the IH coil 17R, slightly away from the center.

TS6 is a non-contact temperature sensor such as an infrared sensor. Measured data from each of these temperature sensors TS3 to TS6 is input to the temperature detection circuit 93. FIG.

In FIG. 39, reference numeral 66 denotes a magnetic shielding ring made of metal such as aluminum, which is fixed to the coil base 17C so as to surround the coil base (coil support frame).

In FIG. 40, 57 is a transformer, which is one of the important electric parts in the power supply circuit board 55 . In FIG. 40, the left end portion of the cover 70 is cut out within a width dimension W11. A temperature sensor TS5 supported by the coil base 17C on the IH coil 17L side is arranged in this notched portion. That is, the notch is provided so that the temperature sensor TS5 and the cover 70 do not come into contact with each other.

In FIG. 41, 58 is a capacitor, which is one of the important electric parts in the inverter circuit board 80. In FIG.
As is clear from FIG. 41, there are two heat sinks 82 made of aluminum on the left and right (in two rows) and two on the front and back, so there are four in total. The four heat sinks 82 are installed such that two heat sinks 82 face each other close to each other. 59 is a diode bridge circuit (diode module) attached to one heat sink 82 . The diode bridge circuit (diode module) 59 dissipates the heat generated during operation by the heat sink 82 and does not overheat.

As is clear from FIG. 41, the outlet 60A of the first cooling fan 60 and the heat sink 82 are separated by a distance LD of about 50 to 100 mm.
46 is a bottom (lower) view of the upper unit 100. FIG. D6 is the maximum front-rear width dimension of the upper unit 100, which is 432 mm.

46 and 47, W4 is the maximum lateral width dimension of the upper unit 100, which is 544 mm.
In FIG. 49, D4 is the effective width of the top plate 15 in the front-rear direction. Here, the effective width D4 in the longitudinal direction is 413 mm.

In FIG. 50, 70 is a cover formed by press working from a thin metal plate, and a large convex portion 70P is formed by press working in the central portion in order to increase strength. 118TL is a supporting side which is a horizontal plane. The support piece 118L is formed by horizontally bending the left vertical portion 118L of the connecting member (reinforcing member) 118. As shown in FIG.

118TR is a horizontal supporting piece. The support piece 118R is formed by horizontally bending the right vertical portion 118R of the connecting member (reinforcing member) 118. As shown in FIG.
When the upper unit 100 and the lower unit 200 are coupled, the support piece 118R comes close to or comes into contact with the lower surface of the flange 16A of the upper unit 100 (see FIG. 54). Therefore, the load that the top plate 15 of the upper unit 100 receives from above can be received by the support piece 118R of the connecting member 118. As shown in FIG.

Also, the left support piece 118L comes close to or contacts the lower surface of the flange 16A of the upper unit 100 when the upper unit 100 and the lower unit 200 are coupled. Therefore, the upper unit 100 is configured to be firmly supported from below by the lower unit 200 .

In FIG. 51, 101M is a large notch formed in the front part of the side vertical wall 101L of the lower case 101. As shown in FIG. W5 is the opening width (horizontal width dimension) of the notch portion 101M, which is about 50 mm to 80 mm. However, the opening width W5 is large enough to allow inspection and repair of the door opening/closing detection mechanism 131. As shown in FIG. For example, the size is such that the support plate 137 can be removed and taken out.

The width of the right vertical portion 118R of the connecting member (reinforcing member) 118 in the front-rear direction is larger than the opening width (horizontal width dimension) W5 of the cutout portion 101M. That is, when the connecting member (reinforcing member) 118 is fixed to the lower case 101, the notch 110M is closed at the same time. As a result, in the completed heating cooker 1, foreign matter does not enter through the notch portion 110M.

Due to the above configuration, when induction cooking is performed in the upper unit 100, as indicated by arrows in FIG. Thus, the inverter circuit board 80, the input operation section 40, the power circuit board 55, and the filter circuit board 54 are cooled.

Summary of Embodiment 2.
As is clear from the above description, the heating cooker 1 of Embodiment 2 has the configuration of the first invention.
That is, the heating cooker 1 in this Embodiment 2 is
It has a flat body 10 with a top plate 15 on which an object to be heated is placed,
Inside the main body, IH coils 17L and 17R for heating the object on the top plate 15, an inverter circuit board 80 arranged below the coils 17L and 17R, and the IH coils 17L and 17R. A cover 70 installed between the inverter circuit board 80 and a first cooling fan 60 that introduces cooling air from the outside of the main body,
The first cooling fan 60 has rotary blades that rotate about a vertical axis, and faces the entrance of the first air passage F1 formed between the inverter circuit board 80 and the cover 70. ,
The first cooling fan 60 supplies the first cooling air RF1 from the inlet FI at one end of the first air passage F1 toward the outlet FO at the other end. be.

Due to this configuration, the IH coil installation space CK and the installation space of the inverter circuit board 80 are divided vertically by the cover 70, and the inverter circuit board 80 can be effectively cooled.

The heating cooker 1 of Embodiment 2 has the configuration of the second invention.
That is, the heating cooker 1 in this Embodiment 2 is
It has a flat body 10 with a top plate 15 on which an object to be heated is placed,
Inside the main body, a left IH coil 17L and a right IH coil 17R are arranged at two positions on the left and right sides for heating the object to be heated on the top plate 15, and a coil common to these two IH coils. and an inverter circuit board 80 arranged below the IH coils, a cover 70 installed between the two IH coils and the inverter circuit board 80, and installed near the left wall surface of the main body, a first cooling fan 60 that introduces cooling air from vent holes formed in the housing,
The cover 70 is installed in series from the first cooling fan 60 to the right side of the bottom of the left IH coil 17L,
The first cooling fan 60 has rotary blades that rotate about a vertical axis, and faces an inlet FI of a first air passage F1 formed between the inverter circuit board 80 and the cover 70. ,
The first cooling fan 60 supplies the first cooling air FR1 from the inlet FI at the left end of the first air passage F1 toward the outlet FO at the right end,
An exhaust window 52A through which the first cooling air FR1 emitted from the first air passage F1 is introduced after passing through the upper space of the cover 70 is provided at the inner rear part of the main body 10,
The formation position of the exhaust window 52A is on the left side of the position of the exit FO of the first air passage F1.

Due to this configuration, the IH coil installation space CK and the installation space of the inverter circuit board 80 are vertically partitioned by the cover 70, and the inverter circuit board 80 can be effectively cooled. Moreover, the cooling air coming out of the air passage F1 flows from the left side to the right side, passes just below the cover 70, then advances to the upper space, cools the upper right IH coil 17R, and cools the IH coil 17R from this position. It advances to 52 A of exhaust windows provided in the distant position.
Part of the cooling air RF1 also cools the left IH coil 17L on the way to the exhaust window 52A. Therefore, the left and right IH coils 17L and 17R can be cooled without guiding the cooling air with a special guide plate or the like.

The heating cooker 1 of Embodiment 2 has the configuration of the third invention.
That is, the heating cooker 1 in this Embodiment 2 is
It has a flat body 10 with a top plate 15 on which an object to be heated is placed,
Inside the main body, there are provided IH coils 17L and 17R for heating the object on the top plate 15, an inverter circuit board 80 arranged below the IH coils 17L and 17R, and the IH coils 17L and 17R. and the inverter circuit board 80, a first cooling fan 60 and a second cooling fan 61 for introducing cooling air from the outside of the main body 10, and a user's operation input An input operation unit 40 that accepts,
The first cooling fan 60 has rotary blades that rotate about a vertical axis,
The first cooling fan 60 faces the inlet FI of the first air passage F1 formed between the inverter circuit board 80 and the cover 70. The first cooling air FR1 is supplied from the inlet FI at one end of F1 toward the outlet FO at the other end,
The second cooling fan 61 is positioned closer to the input operation unit 40 than the first cooling fan 60 and is configured to supply the input operation unit 40 with the second cooling air FR2.

Due to this configuration, the inverter circuit board 80 below the IH coil installation space CK can be effectively cooled by the first cooling fan. Also, the input operation unit 40 can be cooled by the second cooling fan.

The heating cooker 1 of Embodiment 2 has the configuration of the fourth invention.
That is, the heating cooker 1 in this Embodiment 2 is
It has a flat body 10 with a top plate 15 on which an object to be heated is placed,
Inside the main body 10, there are an IH coil for heating the object on the top plate 15, an inverter circuit board 80 arranged below the IH coil, and an inverter circuit board 80 between the IH coil and the inverter circuit board. A cover 70 installed in the main body, a first cooling fan that introduces cooling air from the outside of the main body, and a power circuit board 55 that receives power from a commercial power source and generates the necessary power,
The first cooling fan 60 has rotary blades that rotate about a vertical axis,
The first cooling fan 60 faces the entrance of the first air passage F1 formed between the inverter circuit board 80 and the cover 70. The first cooling air FR1 is supplied from the inlet at one end of the to the outlet at the other end,
The power circuit board 55 is arranged on the opposite side of the first cooling fan 60 with the cover 70 interposed therebetween.

Due to this configuration, the inverter circuit board 80 below the IH coil installation space CK can be effectively cooled by the first cooling fan. In addition, the cooling air F1 that has cooled the inverter circuit board 80 reaches the power circuit board 55 in the traveling direction, so that the electrical components 85 mounted on the power circuit board 55 can be cooled.

The heating cooker 1 of Embodiment 2 has the configuration of the fifth invention.
That is, the heating cooker 1 in this Embodiment 2 is
It has a flat body 10 with a top plate 15 on which an object to be heated is placed,
Inside the main body, an IH coil for heating an object on the top plate, an inverter circuit board 80 arranged below the IH coil, and an inverter circuit board 80 installed between the IH coil and the inverter circuit board. and a first cooling fan 60 that introduces cooling air from the outside of the main body,
The first cooling fan has a rotor that rotates about a vertical axis,
The first cooling fan has an intake port on the bottom surface of the fan case and an outlet port for blowing cooling air on the side surface,
A first air passage F1 formed below the cover 70, a heat sink 82 arranged on the upper surface of the inverter circuit board 80, and the heat sink on a first horizontal plane HP1 crossing the upper and lower centers of the air outlet. and a power control switching element 93 attached to 82, respectively,
An exhaust window 52A for discharging the air after passing through the IH carp 17L, 17R is arranged on a second horizontal plane HP2 above the first horizontal plane HP1.

Due to this configuration, the heat sink of the inverter circuit board 80 can be effectively cooled by the cooling air RF1 horizontally flowing from the first cooling fan. The cooling air RF1 that has cooled the inverter circuit board 80 travels upward, reaches the IH coils 17L and 17R, and reaches the horizontal exhaust window 52A, so that the IH coils 17L and 17R can also be cooled. .

The heating cooker 1 of Embodiment 2 has the configuration of the sixth invention.
That is, the built-in combined heating cooker 1 in this Embodiment 2 is
It is installed in the kitchen furniture,
an upper unit 100 having a first heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed and supported by the kitchen furniture 2;
a lower unit 200 having a heating chamber 113 installed below the upper unit 100 and having a front opening closed by a door 114 so as to be openable and closable;
The lower unit 200 includes a microwave heating device 120 for supplying microwaves to the heating chamber 113, an oven heating device 140 for heating the heating chamber, a cooling fan 128 for cooling the microwave heating device, 129 and
The microwave generation source 122 of the microwave heating device 120 is arranged along one of the left and right side walls of the heating chamber 113, and the oscillation part 122A of the microwave generation source 122 is arranged on the back surface of the heating chamber 113. It is installed horizontally so that it protrudes to the side,
On the back side of the heating chamber 113, a feed port 180 leading to the inside of the heating chamber 113 and an antenna case 124 into which the microwave from the microwave generation source 122 is introduced are provided,
In the antenna case 124, a rotatable antenna 125 is arranged for propagating the microwave oscillated from the microwave generation source 122 to the space in the heating chamber 113 through the feeding port 180. It is a configuration that

Due to this configuration, the magnetron 122 and the antenna case 124 of the microwave heating device 120 can be installed in series in the space from one side wall surface (right side surface) of the heating chamber 113 to the back side, and the inner space is narrow. These devices can be incorporated in the lower unit 200 of the.

The heating cooker 1 of Embodiment 2 has the configuration of the seventh invention.
That is, the built-in composite heating cooker 1 in this Embodiment 2 is
It is installed in the kitchen furniture 2,
an upper unit 100 having an induction heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed and supported by the kitchen furniture 2;
a lower unit 200 having a heating chamber 113 installed below the upper unit 100 and having a front opening closed by a door 114 so as to be openable and closable;
The lower unit 200 includes a microwave heating device 120 that receives power from the upper unit 100 and supplies microwaves to the heating chamber 113, an oven heating device 140 that heats the heating chamber 113, and the microwave oven. cooling fans 128, 129 for cooling the wave heating device 120;
The microwave generation source 122 of the microwave heating device 120 is arranged along one right wall surface or left wall surface of the heating chamber 113, and the oscillation part 122A of the microwave generation source 122 is located on the back side of the heating chamber 113. installed horizontally so as to protrude into the
An antenna case 124 into which microwaves from the microwave generation source 122 are introduced is provided on the back side of the heating chamber 113,
In the antenna case 124, microwaves oscillated from the microwave generation source 122 are transmitted to the space in the heating chamber 113 through a feeding port 180 provided on the back surface of the heating chamber 113. arranging the antenna 125 to be rotated,
The operation of the induction heating source 17, the microwave heating device 120, the oven heating device 140, and the cooling fans 128 and 129 is controlled by an integrated controller MC on the upper unit 100 side. is.

Due to this configuration, the microwave oscillator (magnetron 122) of the microwave heating device 120 and the antenna case 124 are installed in series in the space on the back side from one side wall surface (right side surface) of the heating chamber 113. It is possible to incorporate these devices in the lower unit 200 having a narrow internal space.

Furthermore, since the integrated controller MC controlling the induction heating source 17 centrally controls the microwave heating device 120, the oven heating device 140, the third cooling fan 128 and the fourth cooling fan 129, each It is possible to provide the built-in composite cooking device 1 in which the heat sources are reliably linked.

The heating cooker 1 of Embodiment 2 has the configuration of the eighth invention.
That is, the built-in composite heating cooker 1 in this Embodiment 2 is
It is installed in the kitchen furniture 2,
an upper unit 100 having an induction heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed and supported by the kitchen furniture 2;
a lower unit 200 having a heating chamber 113 installed below the upper unit 100 and having a front opening closed by a door 114 so as to be openable and closable;
The lower unit 200 includes a microwave heating device 120 that receives power from the upper unit 100 and supplies microwaves to the heating chamber 113, and an oven heating device 140 that heats the heating chamber 113. ,
The microwave heating device 120 includes a microwave heating control unit 130, a microwave generation source 122, and a first inverter circuit board 121 that supplies high-frequency power to the microwave generation source 122,
The oven heating device 140 includes a heating chamber control unit 159,
The microwave generation source 122 and the first inverter circuit board 121 are arranged along one side wall surface of the heating chamber 113 and separated in the front-rear direction,
Air is sucked from the outside of the lower unit 200 below the first inverter circuit board 121 and below the heat radiating portion 122H of the microwave generation source 122, and the air is supplied to the first inverter circuit. A front-side cooling fan 128 and a rear-side cooling fan 129, which are individually supplied to the substrate 121 and the heat radiating portion 122H, are arranged.

Due to this configuration, the microwave oscillator (magnetron 122) of the microwave heating device 120 and the inverter circuit board 121 are built into the lower unit 200 of the narrow internal space on one side wall surface (right side surface) of the heating chamber 113. can be made

Furthermore, since the front side (third) cooling fan 128 and the rear side (fourth) cooling fan 129 for individually cooling the heat radiating section 122H and the inverter circuit board 121 are arranged, Overheating of the microwave heating device 120 can be prevented.

The heating cooker 1 of Embodiment 2 has the configuration of the ninth invention.
That is, the built-in combined heating cooker 1 in this Embodiment 2 is
It has a first heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed, and a flat main body 10 whose upper surface opening is closed by the top plate 15. an upper unit 100 supported by kitchen furniture;
a lower unit 200 containing a heating chamber 113 to which microwaves are supplied and a microwave generation source 122;
A connecting member 118 that connects the upper unit 100 and the lower unit 200,
The connecting member 118 is installed in close proximity to or in close contact with at least one side wall surface of the lower unit 200 and at least one side wall surface of the upper unit 100. , respectively, are combined configurations.

Due to this configuration, even in a configuration in which the microwave heating device 120 is provided on the lower unit 200 side, the upper unit 100 and the lower unit 200 can have a strong integrated structure. Therefore, it is possible to prevent the structure from being deformed due to long-term use, thereby preventing a situation in which the degree of adhesion between the heating chamber 113 and the door is lowered due to deformation, thereby preventing microwaves from leaking. It is possible to provide the heating cooker 1 with a high

The heating cooker 1 of the second embodiment has the configuration of the tenth invention.
That is, the built-in composite heating cooker 1 in this Embodiment 2 is
It has a first heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed, and a flat main body 10 whose upper surface opening is closed by the top plate 15. an upper unit 100 supported by the kitchen furniture 2;
A heating chamber 113 to which microwaves are supplied, and a lower unit 200 in which a microwave generation source 122 is built in the lower case 101,
The upper case 16 and the lower case 101 constituting the outer shell of the main body 10 are each made of a thin metal plate,
Side vertical walls 16L and 16R extending vertically are formed at the peripheral end of the upper case 16,
The upper surface of the lower case 101 is entirely open, and the upper unit 100 and the lower unit 200 are connected to each other while the upper case 16 is fitted inside the opening.

Due to this configuration, even in a configuration in which the microwave heating device 120 is provided on the lower unit 200 side, the upper unit 100 and the lower unit 200 can have a strong integrated structure. For this reason, it is possible to prevent the structure from being deformed due to long-term use. A highly safe heating cooker 1 can be provided.

The heating cooker 1 of Embodiment 2 has the configuration of the eleventh aspect of the invention.
That is, the built-in combined heating cooker 1 in this Embodiment 2 is
A top plate 15 on which an object to be heated is placed, an induction heating source 17 for heating the object to be heated through the top plate 15, and a flat upper case whose upper opening is closed by the top plate 15. 16, the upper unit 100 supported by the kitchen furniture 2;
A heating chamber 113 to which microwaves are supplied, and a lower unit 200 in which a microwave heating device 120 is built in the lower case 101,
In the state where the upper case 16 is placed on the lower case 101 , the bottom wall of the upper case 16 also serves as the ceiling surface of the lower case 101 .

This configuration eliminates the need for a special partition plate for covering the ceiling of the lower case 101, a cover plate, and other structures, thereby significantly reducing the manufacturing cost and reducing the weight.
In addition, directly below the rear of the upper case 101, a cavity 104 having a large planar dimension and a large depth dimension BH is formed behind the heating chamber 113. In this cavity, a waveguide 123 and a power supply circuit board are formed. 127 (including the microwave heating control 130, the circuit board of the heating chamber control 159).

Further, if the cavity 104 is located directly below the filter substrate circuit 54, the cavity 104 can be conveniently used when the external commercial AC power supply 99 is drawn into the heating cooker 1 with a power cord.

The heating cooker 1 of the second embodiment has the configuration of the twelfth aspect of the invention.
That is, the built-in composite heating cooker 1 in this Embodiment 2 is
A top plate 15 on which an object to be heated is placed, an induction heating source 17 for heating the object to be heated through the top plate 15, and a flat upper case 16 whose upper opening is closed by the top plate 15. , and supported by the kitchen furniture 2, an upper unit 100;
A lower unit 200 containing a heating chamber 113 heated from above and below by an upper heater 163A and a lower heater 163B,
The lower unit 200 has a lower case 101 that forms an outer shell, a door that opens and closes the opening 113A of the heating chamber 113, and an arm 116 that supports the door 113 to the lower unit 200,
The lower unit 200 includes a microwave oscillation source 122 on the right or left side of the heating chamber 113, and a case A150 containing an inverter circuit board 121 for supplying high-frequency power to the microwave oscillation source 122. prepared,
The case A150 is arranged on the front side of the microwave oscillation source 122A,
Inside the lower unit 200, a space 144 is provided on the front side of the case A150,
The arm 116 and the door opening/closing detection mechanism 131 of the door 114 are housed in the space 144 so that they are adjacent to each other and the door opening/closing detection mechanism 131 is on the outside.

With this configuration, the arm 116 moves in the front-rear direction as the door 114 is opened and closed, so a relatively large installation space is required. 144, the microwave generation source 122 and related structures can be centrally arranged behind this space 144, and various structures can be efficiently arranged within the external dimensions required for the built-in type. It is possible to provide the heating cooker 1 that has been designed.

Embodiment 3.
55 and 56 show a cooking device according to Embodiment 3. FIG. This embodiment is characterized in that the structure for facilitating maintenance and inspection of the arm 116 that supports the door 114 of the heating cooker 1 and the door opening/closing detection mechanism 131 is improved. 1 to 54 are given the same reference numerals, and duplicate description may be omitted.

FIG. 55 is a cross-sectional view of the essential parts showing the right front portion of the lower unit 200 with the door 114 closed. However, the door 114 and the front cover 112 are indicated by dashed lines for reference.

In FIG. 55, reference numeral 150 denotes a case A whose inside is hollow and is entirely made of plastic. An inverter circuit board 121 (not shown) is installed vertically inside the case A150.

Reference numeral 122 denotes a magnetron 122 serving as a microwave oscillation source, which is arranged immediately behind and close to the case A150. Cooling air RF5 and RF6 are supplied to the magnetron 122 and the case A150 by a third cooling fan 128 and a fourth cooling fan 129, respectively.

A space 144 surrounded from both sides by the side vertical wall 101R and the right partition plate 166R is formed between the case A150 and the front plate 101F.
Reference numeral 137 denotes a support plate to which the latch switch 132A (not shown), door switch 132B, and monitor switch 133 (not shown) are collectively attached.
The support plate 137 is installed vertically and fixed to the bottom plate 101U and the front plate 101F of the lower case 101 with screws 146, respectively.

Reference numeral 116 denotes a metal arm whose front end is rotatably supported by the door 114 and penetrates a through hole 117 formed in the front plate 101F. A coiled tension spring 149 is installed at the rear end of the arm 116 to always pull the arm 116 rearward and obliquely downward with respect to the horizontal plane.

101M is a notch formed in the side vertical wall 101R, and 119 is a cover plate that closes the notch 101M from the outside, and is formed of a thin metal plate. The cover plate 119 is attached so as to be detachable from the outside with screws (not shown) or the like.

When a repairer or the like removes the lid plate 119 during maintenance and inspection of the heating cooker 1, the door opening/closing detection mechanism 131 can be visually observed through the notch 101M. Also, by removing the support plate 137 from the outside of the notch 101M, it is possible to inspect, repair, or replace the latch switch 132A (not shown), the door switch 132B, and the monitor switch 133 (not shown). Easy to do. In this case, since the support plate 137 is located in front of the arm 116 when viewed from the notch 101M, the above work can be easily performed.

In the third embodiment, since the notch portion 101M is provided, it is not necessary to remove the side vertical wall 101R when performing maintenance and inspection of the door opening/closing detection mechanism 131. If only 101R can be separated, there is no need to provide the notch 101M.

FIG. 56 is a bottom view of the entire heating cooker 1 viewed from below. As indicated by the dashed line in FIG. 56, the lower case 101 has a large width dimension at the portion facing the connecting member 118 . Therefore, the left vertical portion 118L of the connecting member 118 directly overlaps the surface of the side vertical wall 101L and is fixed with screws 148. As shown in FIG. By increasing the width dimension in this way, the internal space of the lower case 101 is correspondingly increased, and installation of the arm 116 on the left side of the door 114 and the tension spring 149 for constantly pulling the arm 116 is possible. easier.

The heating cooker 1 of Embodiment 3 has the configuration of the twelfth aspect of the invention.
That is, the built-in composite heating cooker 1 of Embodiment 3 is
A top plate 15 on which an object to be heated is placed, an induction heating source 17 for heating the object to be heated through the top plate 15, and a flat upper case 16 whose upper opening is closed by the top plate 15. and an upper unit 100 supported by the kitchen furniture 2;
A lower unit 200 containing a heating chamber 113 heated from above and below by an upper heater 163A and a lower heater 163B,
The lower unit 200 has a lower case 101 constituting an outer shell, a door for opening and closing the opening 113A of the heating chamber 113, and an arm 116 for supporting the door 113 to the lower unit 200,
The lower unit 200 includes a microwave oscillation source 122 on the right or left side of the heating chamber 113, and a case A150 containing an inverter circuit board 121 that supplies high-frequency power to the oscillation source 122.
The case A150 is arranged on the front side of the microwave oscillation source 122A,
Inside the lower unit 200, a space 144 is provided on the front side of the case A150,
The arm 116 and the door opening/closing detection mechanism 131 of the door 114 are housed in the space 144 so that they are adjacent to each other and the door opening/closing detection mechanism 131 is on the outside.

Since the arm 116 moves in the front-rear direction as the door 114 is opened and closed, it requires a relatively large installation space. , the microwave generation source 122 and related structures can be concentratedly arranged behind the space 144, and various structures are efficiently arranged within the outer dimensions required for the built-in type. can provide

Conventionally, the arm 116 that supports the door 114 and moves with the opening and closing of the door has required a large installation space in order to ensure its movable range.
According to the configuration of the third embodiment, the arm 116 is arranged on the side close to the heating chamber 113, and the door opening/closing detection mechanism 131 is centrally arranged on the outside of the arm 116, that is, on the side opposite to the heating chamber 113. Therefore, together with the fact that the magnetron 122 and the inverter circuit board 121 are arranged side by side on the side of the heating chamber 113, as a whole, the microwaves can be efficiently supplied to the side space of the heating chamber 113. A built-in type compound heating cooker can be compactly designed in which the parts required for heating can be stored and the external dimensions are limited.

Furthermore, a third cooling fan 128 and a fourth cooling fan 129 are arranged directly below the case A 150 and directly below the magnetron 122, and the cooling air from the third cooling fan 128 cools the interior of the case A 150. By adopting a configuration in which the inverter circuit board 121 is cooled and the magnetron 122 is cooled by the cooling air from the fourth cooling fan 129, the intake side and the exhaust side of the cooling air can be unified, and the air path inside the lower case 200 is achieved. can be simplified, and the internal configuration of the lower case 200 can be simplified and made more compact.

Embodiment 4.
FIG. 57 shows a heating cooker according to Embodiment 4. FIG. This embodiment is characterized in that the connecting member 118 that connects the upper unit 100 and the lower unit 200 of the heating cooker 1 is improved. 1 to 56 are given the same reference numerals, and duplicate description may be omitted.

57 is a longitudinal sectional view of the same portion as FIG. 9 of Embodiment 1. FIG.
Reference numeral 118 denotes a connecting member for integrating the upper unit 100 and the lower unit 200, and is installed also for the purpose of reinforcement.

The connecting member 118 in the fourth embodiment is divided into two parts unlike the third embodiment.
That is, it is composed of two parts, a right vertical portion 118R and a left vertical portion 118L.

The right vertical portion 118R is formed by pressing a metal plate, and is fixed along the right side surface of the lower unit 200 (side vertical wall 101R).
The left vertical portion 118L is formed by pressing a metal plate, and is fixed along the left side surface of the lower unit 200 (side vertical wall 101L).

The right vertical portion 118R is fixed to the side vertical portion 101R by screws 148 at a plurality of locations so as to be in close contact with the side vertical portion 101R. Similarly, the left vertical portion 118L is also fixed by screws 148 to the side vertical wall 101L.

A large number of through-holes 118H are formed in the left vertical portion 118L so as not to impede air intake from the air vent 164. As shown in FIG. 118TL and 118TR are support sides formed at the upper end portions of the left vertical portion 118L and the right vertical portion 118R. These two support pieces 118TL and 118TR are formed by horizontally bending left and right vertical portions 118L and 118R of the connecting member (reinforcing member) 118 .

When the connecting member 118 is fixed to the left and right side surfaces of the lower unit 200, the support pieces 118L and 118R come close to or contact the lower surface of the flange 16A of the upper unit 100. As shown in FIG. Therefore, the load that the top plate 15 and the like of the upper unit 100 receive from above can be reliably received by the support pieces 118L and 118R of the connecting member 118 .

In this fourth embodiment, the connecting member 118 is a flat part compared to the connecting member 118 of the third embodiment. Therefore, it is advantageous in terms of manufacturing cost, and the work for fixing the connecting members 118 to the left and right side surfaces of the lower unit 200 can be made easier than in the case of the third embodiment.

Further, when the notch portion 101M is formed in the front portion of the side vertical wall 101L of the lower case 101, the notch portion 101M can be normally closed by the right vertical portion 118R. When the door opening/closing detection mechanism 131 needs to be inspected or repaired, it is sufficient to remove only the right vertical portion 118R on one side, thereby improving work efficiency.

The heating cooker 1 of the fourth embodiment has the configuration of the tenth invention.
That is, the built-in composite heating cooker 1 of Embodiment 4 is
It has an induction heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed, and a flat main body 10 whose upper surface opening is closed by the top plate. an upper unit 100 supported by the furniture 2;
A heating chamber 113 to which microwaves are supplied, and a lower unit 200 in which a microwave generation source 122 is built in the lower case 101,
The upper case 16 and the lower case 101 constituting the outer shell of the main body 10 are each formed of a thin metal plate,
Side vertical walls (overlapping portions) 16L and 16R extending in the vertical direction are integrally formed at the peripheral end portion of the upper case 16,
The upper surface of the lower case 101 is entirely open, and the upper unit 100 and the lower unit 200 are connected with the upper case 16 fitted inside the opening.

Due to this configuration, even in a configuration in which the microwave heating device 120 is provided on the lower unit 200 side, the upper unit 100 and the lower unit 200 can have a strong integrated structure. Therefore, it is possible to prevent the structure from being deformed due to long-term use. For example, it is possible to prevent a situation in which the degree of adhesion between the heating chamber 113 and the door 114 is lowered due to the deformation and the microwave leaks. , the heating cooker 1 with high safety can be provided.

Embodiment 5.
FIG. 58 shows a heating cooker according to Embodiment 5. FIG. This embodiment is characterized by providing a gap GP12 between the upper unit 100 and the lower unit 200 of the heating cooker 1, and improving the connecting member 118 that connects the exhaust fan to the inside of the lower unit 200. is. 1 to 57 are given the same reference numerals, and duplicate description may be omitted.

58 is a longitudinal sectional view of the same part as FIG. 9 of Embodiment 1. FIG.
Lower case 101 is suspended from upper case 16 . A minute gap GP12 is formed between the partition plate 171 that constitutes the substantial ceiling surface of the lower case 101 and the bottom wall 16S of the upper case 16 . This gap GP12 is automatically formed when the upper case 16 and the lower case 101 are connected with the connecting member 118 or the like. Note that N is an object to be heated such as a metal pot.

The gap GP12 extends over the entire partition plate 171 of the lower case 101 and is open to the periphery (front and back, left and right). A size of several millimeters or less is sufficient for this gap GP12. If it is too large, the external dimensions of the upper unit 100 and the lower unit 200 will need to be reduced. This gap GP12 is provided to reduce the thermal influence from the heating chamber 113 of the lower unit 200 as much as possible, and is expected to have a heat insulating effect due to the air layer.

155 is an exhaust fan. The exhaust fan 155 is arranged behind the left corner of the heating chamber 113 inside the lower case 101 . The rotating shaft of the exhaust fan 155 is elongated in the left-right direction and installed horizontally. Rotating blades are attached around the rotating shaft.

Reference numeral 102 denotes an exhaust duct whose one end opening is connected to the exhaust port side of the exhaust fan 155 and which extends vertically to the desired position immediately below the exhaust cover 19 . In the vicinity of the final exhaust port of the exhaust duct 102, an exhaust window 52A of the partition plate 52 faces. Therefore, the cooling air flowing through the IH coil installation space CK of the upper unit 100 passes through the exhaust window 52A. Then, it is guided by the exhaust flow discharged from the exhaust duct 102 and discharged to the outside.

Heating chamber 113 receives microwaves from magnetron 122 (not shown) of microwave heating device 120 . Although not shown, an upper heater 163A and a lower heater 163B are arranged near the bottom surface and the ceiling surface of the heating chamber 113, respectively.

Reference numeral 156 denotes an intake hole formed on the bottom plate 101U of the lower case 101 on the side closer to the door 114, and is configured by providing a plurality of small-diameter holes.
113H is an exhaust hole provided on the ceiling surface of the heating chamber 113 . As shown in FIG. 58, the exhaust holes 113 are provided on the side close to the door 114 and on the side close to the rear surface.

58 indicate the flow of air sucked by driving the exhaust fan 155. In FIG. As described in the first embodiment, the cooling air RF6 after cooling the heat radiating portion 122H of the magnetron 122 is guided into the heating chamber 113 .

On the other hand, the cooling air RF5 after cooling the inverter circuit board 121 is guided to the vicinity of the suction port of the exhaust fan 155 . This guidance is performed so as to pass through the outside without passing through the inside of the heating chamber 113 .

Therefore, in this fifth embodiment as well, the inverter circuit board 121 and the magnetron 122 of the microwave heating device 120 are simultaneously cooled by two systems of cooling air, and are finally forcibly discharged to the outside by the exhaust fan 155. be done. Therefore, there is no concern that the cooling air that has cooled the microwave heating device 120 will stay inside the lower unit 200 .

TS 10 is a temperature sensor that detects the temperature of air discharged from heating chamber 113 . The temperature measurement data of this temperature sensor is sent to the heating chamber control unit 159 and used for controlling the ambient temperature of the heating chamber 113 and detecting an overheating state.

Reference numeral 157 denotes a sealing material for suppressing leakage of microwaves from between the door 114 and the front plate 101F of the lower unit 200, and is made of elastic microwave absorbing rubber or the like.

GP13 is the gap formed between door 114 and kitchen furniture 2 . This clearance is minimally required for the door 114 to open forward.

According to the configuration of the fifth embodiment, since the gap GP12 is formed between the upper unit 100 and the lower unit 200 in a state where they are connected, the thermal influence from the heating chamber 113 of the lower unit 200 can be reduced as much as possible, and the filter circuit board 54 and the power circuit board 55 built in the upper unit 100 can be prevented from being heated from below.

Embodiment 6.
FIG. 59 shows a built-in combined heating cooker according to Embodiment 6. FIG. Parts that are the same as or correspond to the configurations of the embodiments described in FIGS. 1 to 58 are denoted by the same reference numerals.

FIG. 59 is a block diagram particularly showing an electrical configuration of the heating cooker 1 showing Embodiment 6 of the present invention. In FIG. 59, dashed arrows indicate command signals for control.
In the heating cooker 1 showing Embodiment 6 of the present invention, there are a total of six controllers mainly composed of microcomputers. This point is a major difference from the first to fifth embodiments.

Among the six control devices described above, the comprehensive control device MC controls the entire heating cooker 1 . It is the controller 90 that receives commands from the integrated controller MC and controls the induction heating cooking. A controller 105 controls microwave cooking and oven cooking. The control device 105 is a combination of the heating chamber control section 159 and the microwave heating control section 130 described in the first embodiment.

The two control devices 90 and 105 described above are sometimes called slave (SLAVE) microcomputers because they perform specified control according to commands to the integrated control device MC and return processing results to the integrated control device MC. In this case, the integrated control device MC is called a master microcomputer.

The remaining three of the six control devices are a right input control device 23 that processes the input of the right touch key group and the display of the display unit 31R in the input operation unit 40, and the left touch key group. They are the left input control device 24 that processes the input and the display of the display section 31L, and the power switch control device 28 .
The power switch control device 28 detects the operation of the operation button (operation unit) 98 of the main power switch 97 arranged in the input operation unit 40 and determines ON/OFF of the power supply.

59, 106A is a plug connected to a commercial (AC) power supply 99. In FIG. Power at a voltage of 200 V, 50 Hz or 60 Hz is led through power cord 106 to filter circuit board 54 . Note that the filter circuit board 54 is built in the upper unit 100 .

The filter circuit board 54 has a main relay 107 for turning ON/OFF the main power of the heating cooker 1 and a sub-relay (not shown). FIG. 59 schematically shows only the main relay.

The main relay 107 is opened and closed upon receiving a predetermined relay control signal from the integrated control device MC that controls the entire heating cooker 1 . As will be described later, the sub-relay receives a relay control signal from the power switch control means 28 and performs an opening/closing operation. The power switch control means 28 has a function of detecting the operation of the operation button 98 of the main power switch 97 and determining ON/OFF of the power. A main power switch 97 is composed of the main relay 107 and the sub-relay.

The integrated control device MC constantly acquires operation information from the control devices 90 and 105, the right input control device 23, the left input control device 24, and the power switch control device 28, and integrates and controls them. Further, it controls the display operation of the central control unit 30 , the voice synthesizing device 95 and the wireless communication unit 49 . The integrated control device MC, the right input control device 23 and the power switch control device 28 are attached to the central operation board 32 that constitutes the input operation section 40 .

The central operation board 32 is similar to the operation board 41 described in Embodiment 1, and includes various electronic components to be described later, the integrated control device MC, the right input control device 23 and the power switch control device 28. etc. is implemented. The central operation board 32 is made of a plastic material with excellent electrical insulation.

Reference numeral 55 denotes a power circuit board to which commercial power is supplied from the filter circuit 54. As shown in FIG. and a power supply circuit B36 through which power is applied. By these two power supply circuits A34 and B36, the power of voltage 200V is converted into low voltage direct current such as 24V, 18V, 6V and 5V.

The 5V electric power is supplied as a power source for the integrated control device MC, the control devices 90 and 105, the right input control device 23, the left input control device 24, and the power switch control device 28.
Also, the 6V power is used as a power supply (including a backlight power supply) for the central display section 30, the right display section 31R, and the left display section 31R.

The power circuit board 55 is installed in the upper unit 100, and as described above, the power generated by the power circuit A34 and the power circuit B36 is used as the power source for the control and display units in the upper unit 100. It is

80 is an inverter circuit board of the induction heating source 17 installed inside the upper unit 100 .
The inverter circuit board 80 includes a right inverter circuit 81R with a DC power supply section 75R and a left inverter circuit 81L with another DC power supply section 75L.

AC power with a voltage of 200 V is applied to the inverter circuit board 80 from the filter circuit 54 . Reference numeral 90 denotes a control device for overall control of induction heating, which is mainly composed of a microcomputer.

The control device 90 sends drive signals to the drive circuits 37L, 37R that drive the IGBTs 79a, 79b in the inverter circuits 82L, 82R. The two drive circuits 37L and 37R operate with 18V power supplied from the power supply circuit A34 and the power supply circuit B36, and control the IGBTs 79a and 79, respectively. This controls the driving frequencies of the inverter circuits 81L and 81R.

For example, the drive circuit A37R detects the conduction time of the power switching element 93 (semiconductor switching element) (IGBT79a, 79b) and switches the conduction time to lower the drive frequency of the inverter circuit 81R and reduce the thermal power. Or conversely, control is performed to raise the drive frequency and raise the thermal power. These driving frequency commands are issued from the control device 90 .

77a is an input current detector installed on the commercial power supply side of the inverter circuits 81L and 81R, and 77b is an output current detector that detects power on the output side of the inverter circuits 81L and 81R.
The detected values of the input current detector 77a and the output current detector 77b are input to the controller 90. FIG.

In the initial stage of induction cooking, the control device 90 determines the material of the object to be heated.
For example, when the driving frequency is changed from one driving frequency to another, the change in the input current value is observed to determine whether the material of the object to be heated such as a pot is magnetic metal, non-magnetic stainless steel, aluminum, etc. Then, the driving frequency of the switching elements (IGBT) 79a, 79b is automatically adjusted to an appropriate value. When the material of the object to be heated is determined to be non-magnetic stainless steel, it is driven at a driving frequency (eg, 31 kHz) higher than the driving frequency (eg, 23 kHz) when the object is determined to be iron.

TS5 and TS6 are non-contact temperature sensors installed in the gaps of the IH coils 17L and 17R, and TS3 and TS4 are contact temperature sensors installed in the center of the IH coils 17L and 17R. TS8 and TS9 are contact temperature sensors installed on the heat sink 82 of the inverter circuit board 80 . Temperature detection data from each of these temperature sensors is input to the integrated controller MC.

Although the temperature detection circuit 93 is provided in the first embodiment, the temperature detection circuit 93 in the form of hardware is not provided in the sixth embodiment. Processing such as temperature detection, temperature comparison, and whether or not there is an abnormality is executed by software in the integrated control device MC.

131 is a door opening/closing detection mechanism. The door opening/closing detection mechanism 131 includes one switch that is opened and closed according to the opening/closing operation of the door 114, and a monitor switch that detects whether the switch is properly opened/closed. This point is the same as that described in the first and second embodiments.

Reference numeral 120P denotes a power supply circuit unit of the microwave heating device 120, which generates AC power as a low voltage (for example, 24V and 5V) power supply from commercial voltage (200V) power supplied from the filter circuit 54. FIG. The power of 5V is supplied as the power supply for the control device 105, and the power of 24V is supplied to the driving circuits 177 of the third cooling fan 128 and the fourth cooling fan 129, respectively. In addition, 24V power is supplied as a drive power source for the antenna drive motor 126 .

The upper heater 163A and the lower heater 163B for heating the heating chamber 113 are controlled by the controller 105 by opening and closing the relays 178A and 178B. The relays 178A and 178B may use semiconductor switching elements capable of finely controlling the energization rate. there is The upper heater 163A and the lower heater 163B are applied with a voltage of 200 V, which is the same as the commercial power supply, and operate.

A door open detection switch 132M constitutes a part of the door open/close detection mechanism 131 . The switch itself is installed inside the door opening/closing detection mechanism 131, but is drawn at a different position in FIG.

160 is an infrared sensor for measuring the temperature of food, etc. in the heating chamber 113, and TS2 is a contact sensor for measuring the temperature of the magnetron 122 of the microwave heating device 120. FIG. Temperature detection data of these sensors 160 and TS2 are all input to the control device 105 .

121A is an inverter circuit that supplies high-frequency power to the magnetron 122, and its oscillation is controlled by a relay 182 inserted in the power supply side circuit. Opening and closing of the relay 182 is performed by the control device 105 .

Drive circuits 60P and 61P drive the first cooling fan 60 and the second cooling fan 61, respectively. The drive circuits 60P and 61P operate in response to commands from the control device 90. FIG.

Although FIG. 59 does not show a temperature sensor for monitoring the temperature of the central display unit 30 and the input operation unit 40, in practice such a temperature sensor is installed and constantly (at regular time intervals) during cooking. 2) The temperature measurement data is acquired by the integrated controller MC and monitored so that the temperature does not become abnormal.

Reference numeral 38 denotes a left operation board, which is installed on the left side of the central operation board 32 and made of an electrically insulating material. The left input control device 24 and the left display section 31L are attached to the left operation board 38. As shown in FIG. The left operation board 38 and the central operation board 32 are installed adjacent to each other so as to be aligned substantially on the same plane.

Since the heating cooker 1 of Embodiment 6 is configured as described above, when starting cooking, first, to turn on the main power switch 97, the operation key 98 of the input operation unit 40 is pressed. For example, if the switch is held down for several seconds, this operation is detected by the power switch controller 28 and the main relay 107 in the filter circuit board 54 is closed.

Therefore, commercial power is supplied from the filter circuit board 54 to the power circuit board 55 . A power supply with a predetermined voltage is generated by the power supply circuit A34 and the power supply circuit B36 of the power supply circuit board 55 and applied to the integrated control device MC.

When the integrated controller MC is activated, it first performs an initial self-diagnosis before starting the heating operation to confirm that no abnormality has occurred. Also, the central display unit 30 is activated to display the initial information.

In this state, when the user opens the door 114 of the heating chamber 113 to use the microwave heating device 120 , the door opening/closing detection mechanism 131 transmits a signal indicating that the door 114 is open to the control device 105 . Therefore, the control device 105 transmits a signal indicating opening of the door 114 to the integrated control device MC. The integrated control device MC presumes that the user will perform microwave cooking, displays necessary information for starting microwave heating on the central display unit 30, and prompts an input for starting heating.

When the user puts food into the heating chamber 113 and closes the door 114, the door opening/closing detection mechanism 131 again transmits a detection signal indicating that the door 114 is closed to the integrated control device MC via the control device 105. . Therefore, when a command to start heating is issued from the input operation unit 40 in this state, the right input control device 23 detects whether there is a touch input on the input key for microwave heating. Therefore, a signal indicating a heating start command is transmitted from the right input control device 23 to the integrated control device MC. The right input control device 23 also detects the input of the central operation unit 40M described in the first embodiment. When the various touch input keys 43M and 44M described in the first embodiment are operated, an input signal corresponding to the operation is transmitted to the integrated control device MC.

The integrated controller MC issues a drive command to the controller 105 that controls the microwave heating operation, closes the relay 182, drives the inverter circuit 121A, and starts microwave heating. At the same time, an operation command signal is issued to the driving circuits 177A and 177B of the third cooling fan 128 and the fourth cooling fan 129, and the two cooling fans 128 and 129 start operating. Furthermore, although not shown in FIG. 59, the antenna drive motor 126 is driven to rotate the antenna 125 . As a result, microwaves are introduced into the heating chamber 113 to heat and cook the food.

As is clear from the above description, the first cooling fan 60 and the second cooling fan 61 of the upper unit 100 are not operated at all during the microwave cooking. Therefore, the power consumption of the entire heating cooker 1 can be kept low.

The touch-type input key unit constituting the input operation unit 40 is provided with electrodes for detecting changes in capacitance corresponding to individual touch key areas. A large number of components are required, such as LEDs (light emitting diodes) for illuminating the . Therefore, although not shown in FIG. 59, the parts constituting the touch-type input key section are mounted on the central operation board 32 and the left operation board 38 . The components of the input key 98 of the power switch 97 are also mounted on the central operation board 32 .

(Summary of Embodiment 6)
The heating cooker 1 of the sixth embodiment has the configuration of the seventh invention, like the first embodiment.
That is, the built-in combined heating cooker 1 in this Embodiment 6 is
It is installed in the kitchen furniture 2,
an upper unit 100 having an induction heating source 17 for heating the object to be heated via a top plate 15 on which the object to be heated is placed and supported by the kitchen furniture 2;
a lower unit 200 having a heating chamber 113 installed below the upper unit 100 and having a front opening closed by a door 114 so as to be openable and closable;
The lower unit 200 includes a microwave heating device 120 that receives power from the upper unit 100 and supplies microwaves to the heating chamber 113, an oven heating device 140 that heats the heating chamber 113, and the microwave oven. cooling fans 128, 129 for cooling the wave heating device 120;
The microwave generation source 122 of the microwave heating device 120 is arranged along one right wall surface or left wall surface of the heating chamber 113, and the oscillation part 122A of the microwave generation source 122 is located on the back side of the heating chamber 113. installed horizontally so as to protrude into the
An antenna case 124 into which microwaves from the microwave generation source 122 are introduced is provided on the back side of the heating chamber 113,
In the antenna case 124, microwaves oscillated from the microwave generation source 122 are propagated to the space in the heating chamber 113 through a feeding port 180 provided on the back surface of the heating chamber 113. arranging the antenna 125 to be rotated,
The operation of the induction heating source 17, the microwave heating device 120, the oven heating device 140, and the cooling fans 128 and 129 is controlled by an integrated controller MC on the upper unit 100 side. Configuration.

Due to this configuration, the microwave oscillator (magnetron 122) of the microwave heating device 120 and the antenna case 124 are installed in series in the space on the back side from one side wall surface (right side surface) of the heating chamber 113. It is possible to incorporate these devices in the lower unit 200 having a narrow internal space.

Furthermore, in this Embodiment 6,
an upper unit 100 having an induction heating source 17 for heating an object to be heated and supported by kitchen furniture;
A lower unit 200 attached to the upper unit 100 and containing a heating chamber 113,
The lower unit 200 is provided with a microwave heating device 120 that supplies microwaves to the heating chamber 113 and an oven heating device 140 that heats the heating chamber,
The upper unit includes a control device 90 that controls the induction heating source 17, a control device 105 that controls both the microwave heating device 120 and the oven heating device 140, and these two control devices (slave microcomputers) 90. , and a control device MC (master microcomputer) MC for integrally controlling 105,
The upper unit 100 includes a filter circuit board 55 that receives power from a commercial power supply 99, and a power supply circuit 55 (34, 36) that converts the power from the filter circuit board 55 into a specified power supply voltage,
The control device 105, the control device 90, and the integrated control device MC are supplied with low-voltage power generated by the power supply circuit 55 (34, 36),
The inverter circuit 81 of the induction heating source 17, the microwave generation source 122 of the microwave heating device 120, the upper heater 163A and the lower heater 163B of the oven heating device 140 are connected to the filter circuit 54 and the power supply circuit 55 ( 34, 36) is applied with distributed power (200V power source).

This configuration simplifies the power supply configuration of the heating cooker 1 as a whole, and suppresses unnecessary noise propagation, etc., so that reliable operation can be expected.

Other embodiments.
In the case of a user (user) who does not need both the upper unit 100 and the lower unit 200 at the same time as shown in Embodiments 1 to 6, the upper unit 100 and the lower unit 200 are sold or installed on the kitchen furniture 2. Work is separate. The lower unit 200 is set as an optional item, for example. In such a case, for example, if a packing form for selling the upper unit 100 and the lower unit 200 as a set and a packing form for selling only the upper unit 100 are separately set, the convenience at the time of sale is impaired. never

The cooking plate 162 described in Embodiment 2 may be coated with black ceramic over its entire surface. Since such a ceramic coating can be expected to have a far-infrared effect, the food can be heated deep inside, and delicious dishes can be prepared.

The induction heating circuit may adopt various driving methods such as a half-bridge circuit, a full-bridge circuit, etc. according to the form and number of the IH coils 17L and 17R. For example, full bridge circuits are proposed in Japanese Patent No. 6130411 and Japanese Patent No. 6173623.
In addition, the IH coil is not limited to a doughnut-shaped shape. , a flat first sub-heating coil and a flat second sub-heating coil having a width dimension smaller than the radius of the main heating coil.

In the above description, as a typical example of the heating cooker 1, the present invention has been described in the case of a heating cooker provided with two induction heating portions. It may be changed to various types of radiant electric heaters such as heaters.

Of the processes described in the embodiments, all or part of the processes described as being automatically performed can also be performed manually. All or part of the processes described as being performed manually can also be performed automatically by known methods.

Each circuit, part, and component of the device shown in the figure is functionally conceptual, and does not necessarily have to be physically configured as shown in the figure. Furthermore, the integrated control device MC, the microwave heating control unit 130, the heating chamber control unit 159, and the display unit driving circuit 63 described in FIG. The forms are not limited to those shown in the drawings, and all or part of them can be configured by functionally or physically distributing and integrating them in arbitrary units according to functions, operating conditions, and the like.

For example, part of the data and programs in the storage device MM and the storage device 90R shown in FIG. In this case, the heating cooker 1 acquires necessary data and program information by accessing an external recording medium (storage server).

Furthermore, the operation programs of the integrated control device MC, the microwave heating control unit 130, the heating chamber control unit 159, and the display unit driving circuit 63, which are described particularly with reference to FIG. You may make it update to the thing improved suitably by hope. In this case, the modification program may be obtained through the wireless communication unit 49, for example.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The substantial scope of the present invention is indicated by the scope of claims rather than the above description, and is intended to include all modifications within the scope and meaning of equivalents of the scope of claims.

INDUSTRIAL APPLICABILITY The heating cooker and kitchen furniture according to the present invention can be widely used not only in the kitchens of general houses but also in the kitchens of public facilities, shops, and the like.

REFERENCE SIGNS LIST 1 induction heating cooker 2 kitchen furniture 2A installation opening 2B front opening 2P mouth edge upper surface 3 surface material 4 surface material 5 surface material 6 surface material 7 frame line 8 wall 10 main body 11 inclined portion 13 heating chamber 13A opening 14 door 15 top plate 16 upper case (upper housing)
16A flange 16B rear vertical wall 16F front vertical wall 16L side vertical wall 16R side vertical wall 16S bottom wall (bottom)
17 induction heating source 17C coil base (coil support frame)
17CH arm 17L IH coil (induction heating coil)
17R IH coil (induction heating coil)
18 opening 19 exhaust cover 20 exhaust port 21 decorative frame 22 reinforcing plate 23 right input control device 24 left input control device 25 decorative frame 26 cushion material 28 power switch control device 30 central display 31L left display 31R right display 32 central operation Substrate 33 Rectifier circuit 34 Power supply circuit A
35 rectifier circuit 36 power supply circuit B
37L drive circuit 37R drive circuit 40 input operation unit 40L left operation unit 40M center operation unit 40R right operation unit 41 operation board 42 board holder 43L input key 43M input key 43R input key 44L input key 44M input key 44R input key 45L input key 45M Input key 45R Input key 46L Window 46R Window 47 Input key 48 Infrared transmitter 49 Wireless communication unit (wireless communication module)
51 screw 51F screw 52 partition plate 52A exhaust window 53 exhaust port plate 53A through hole 54 filter circuit board 55 power supply circuit board 56 choke coil 57 transformer 58 capacitor 59 diode bridge circuit (diode module)
60 First cooling fan 60A Air outlet 60C Fan case 60M Motor 60P Drive circuit 61 Second cooling fan 61A Air outlet 61C Fan case 61M Motor 61P Drive circuit 62 Cooling fan drive circuit 63 Display drive circuit 64 Air vent 65 Bottom plate 66 Magnetic shielding ring 70 cover 71 support plate 72 power control unit (demand control unit)
73 signal transmission unit 74 drive circuit 75 DC power supply circuit 76 resonance capacitor 77a input current detection unit 77b output current detection unit 78a diode bridge 78b reactor 78c smoothing capacitor 79a IGBT
79b IGBTs
79c Diode 79d Diode 80 Inverter Circuit Board 81 Inverter Circuit 81L Inverter Circuit 81R Inverter Circuit 82 Heat Sink 82F Radiation Fin 83 Power Control Switching Element 84 Vibration Sensing Device 85 Electric Part 90 Control Device 90R Storage Device 91 Power Supply Circuit 92 DC Power Converter 93 Temperature detection circuit 94L Induction heating circuit 94R Induction heating circuit 95 Voice synthesizer 95S Speaker 96 Clock circuit 97 Main power switch 98 Main power switch operation button or operation key 99 Commercial power supply (commercial AC power supply)
100 upper unit 101 lower case (lower housing)
101B Rear plate 101C Inclined portion 101F Front plate 101H Body portion 101M Notch portion (inspection door)
101U bottom plate 101L side vertical wall 101P projection 101T front horizontal wall 101R side vertical wall 101N through hole (engagement hole)
102 Exhaust duct 102A Internal passage 102B Internal passage 102E End portion 103 Stepped portion 104 Cavity 105 Control device 106 Power cord 106A Plug 110 Main body 111 Inclined portion 112 Front cover 113 Heating chamber 113A Opening 113B Rear wall (rear wall surface)
113T recess 114 door 115 handle 116 arm 117 through hole (guide hole)
118 connecting member (reinforcing member)
118H through-hole 118L left vertical portion 118M central flat portion 118P concave or convex portion 118R right vertical portion 118TL supporting piece 118TR supporting piece 118N through-hole (engagement hole)
119 cover plate 120 microwave heating device 120P power supply circuit unit 121 inverter circuit board 121A inverter circuit (drive circuit)
122 magnetron (microwave source)
122A Oscillating section 122H Heat radiating section 123 Waveguide 124 Antenna case 125 Antenna 126 Antenna driving motor 126A Rotating shaft 127 Power supply circuit board 128 Third cooling fan (front side cooling fan)
129 fourth cooling fan (rear side cooling fan)
130 microwave heating control unit 131 door open/close detection mechanism 132A latch switch 132B door switch 133 monitor switch 134 pin 135 pin 136A interlocking rod 136B interlocking rod 137 support plate 138A communication port 138B communication port 139 closure detection unit 140 oven heating device 141 space ( ceiling space)
142 space (side space)
143 heat radiation fins of heat sink 144 space 145 saucer 146 screw 147 tableware 148 screw (fixing tool)
149 tension spring 150 case A
151 Case B
152B Air inlet 152F Air inlet 153 Duct 154 Case C
154A Lid 154B Main Body 155 Exhaust Fan 156 Suction Hole 157 Sealing Material 158 Non-Contact Temperature Measurement Section (Infrared Temperature Measurement Section)
159 heating chamber control unit 160 temperature sensor 161 detection window 162 cooking plate 163 heater 163A upper heater 163B lower heater 164 vent 165 recess (air intake duct)
166L Left partition plate 166R Right partition plate 167 Upper heat shield plate 168 Lower heat shield plate 169 Upper case 170 Lower case 171 Partition plate 172 Passage 173 Communication port 174 Communication port 176 Hinge 178A Relay 178B Relay 179 Fixing bracket 179B Support base 180 Power supply port 181 cover 182 relay 183 screw 184 sealing material 185 radio wave sealing chamber 186 screw 187 screw 190 frame 191 cover 192 inner frame 192W viewing window (opening)
193 Inner seal frame 194 Choke chamber 195 Seal plate 196 Seal plate 197 Upper shield plate 198 Support fitting 198H Horizontal part 198R Fixed part 198V Vertical part 199 Wind direction plate 200 Lower unit 201 Inlet AL Exposed range of top plate BH Depth dimension BT1 Dedicated Power supply (internal battery)
CK IH coil installation space D6 Front-back direction maximum width dimension DP1 Depth (dimension)
DP2 Dimensions F1 First air passage F2 Second air passage FI Inlet FO Outlet GP1 Gap GP2 Gap GP3 Gap GP4 Gap GP5L Gap GP5R Gap GP6 Gap GP7 Gap GP8 Gap GP9 Gap GP10 Gap GP11 Gap HL1 First horizontal line HL2 Second horizontal line line H1 Maximum height dimension HP1 First horizontal plane HP2 Second horizontal plane HV Effective height dimension HX Maximum height dimension LA Projection dimension LB Projection dimension LD Distance LF Exhaust port dimension LW Exhaust range MC Integrated control device MM Storage device N Heated Item RF1 Cooling air RF2 Cooling air RF3 Cooling air RF4 Cooling air RF5 Cooling air RF6 Cooling air W2 Maximum width W3 Maximum width W4 Maximum width dimension W5 Notch opening width WH Inside width dimension (frontage dimension).

Claims (13)

A kitchen furniture comprising: a first heating source for heating an object to be heated via a top plate on which the object to be heated is placed; and a flat main body having an upper opening closed by the top plate. an upper unit supported by
a lower unit containing a heating chamber to which microwaves are supplied and a microwave generation source;
a connecting member that connects the upper unit and the lower unit,
The connecting member is installed in close or close contact with at least one side wall surface of the lower unit and at least one side wall surface of the upper unit, and is coupled to both the lower unit and the upper unit. and
The upper unit has a box-shaped upper case forming an outer shell,
The upper end of the upper case has a horizontally extending flange,
The lower unit has a box-shaped lower case forming an outer shell.
A built-in composite heat cooking device characterized in that the upper end of the connecting member is formed with a support piece that is in close proximity to or abuts against the lower surface of the flange while being fixed to the upper case and the lower case. vessel. the upper end of the connecting member is fixed to at least one side wall surface of the upper case;
2. The built-in composite heating cooker according to claim 1 , wherein the lower end of said connecting member is fixed to at least one side wall of said lower case. 2. The built-in composite heating cooker according to claim 1, wherein the connecting member has a shape that continuously covers the bottom surface and the left and right side walls of the lower unit. The connection member is formed of a thin metal plate, and includes left and right vertical portions that are fixed to the side surfaces of the lower unit with screws, and a central flat portion that connects the lower ends of the left and right vertical portions. The built-in composite heating cooker according to any one of claims 1 to 3 , characterized in that 2. The built-in composite heating cooker according to claim 1, wherein said connecting member is connected to said upper unit and said lower unit by a detachable fixture. further comprising a door for freely opening and closing an opening in the front part of the heating chamber;
The lower unit includes a hinge that rotatably supports the lower portion of the door, and a pair of arms that support the load of the door on the left and right,
2. The built-in composite heating cooker according to claim 1 , wherein said connecting member covers a side surface of said lower case corresponding to a connecting portion between said arm and said lower unit. further comprising a door for freely opening and closing an opening in the front part of the heating chamber;
The lower unit includes a hinge that rotatably supports the lower portion of the door, and a door opening/closing detection mechanism that includes a plurality of switches for detecting opening/closing of the door,
Notches are provided on the side surface of the lower case corresponding to the arrangement portions of the plurality of switches to enable inspection of the switches,
The outside of the notch is covered with the connecting member,
2. The built-in combined type cooking according to claim 1 , wherein the connecting member opens the notch and exposes the switch when the connection between the lower unit and the upper unit is released. vessel. further comprising a door for freely opening and closing an opening in the front part of the heating chamber;
The lower unit includes a hinge that rotatably supports the lower part of the door, a door opening/closing detection mechanism that includes a plurality of switches for detecting opening/closing of the door, arms that support the load of the door on the left and right sides, with
The door opening/closing detection mechanism is arranged outside the arm when viewed from the heating chamber,
Notches are provided on the side surface of the lower case corresponding to the arrangement portions of the plurality of switches to enable inspection of the switches,
The outside of the notch is covered with the connecting member,
2. The built-in combined type cooking according to claim 1 , wherein the connecting member opens the notch and exposes the switch when the connection between the lower unit and the upper unit is released. vessel. A kitchen furniture comprising: a first heating source for heating an object to be heated via a top plate on which the object to be heated is placed; and a flat main body having an upper opening closed by the top plate. an upper unit supported by
A heating chamber to which microwaves are supplied, and a lower unit in which a microwave generation source is built in a lower case,
The upper case and the lower case constituting the outer shell of the main body are each formed of a thin metal plate,
A lateral vertical wall extending vertically is formed at the peripheral edge of the upper case,
The entire upper surface of the lower case is open, and the upper unit and the lower unit are connected in a state in which the upper case is fitted inside the opening,
A built-in composite heating cooker, wherein the microwave generation source is supplied with electric power generated by a power circuit board inside the upper unit as a control power supply. A kitchen furniture comprising: a first heating source for heating an object to be heated via a top plate on which the object to be heated is placed; and a flat main body having an upper opening closed by the top plate. an upper unit supported by
A heating chamber to which microwaves are supplied, and a lower unit in which a microwave generation source is built in a lower case,
The upper case and the lower case constituting the outer shell of the main body are each formed of a thin metal plate,
A lateral vertical wall extending vertically is formed at the peripheral edge of the upper case,
The entire upper surface of the lower case is open, and the upper unit and the lower unit are connected in a state in which the upper case is fitted inside the opening,
The lower unit further comprises an oven heating device for heating the heating chamber,
A built-in combined heating cooker characterized in that the microwave generation source and the oven heating device are supplied with electric power generated by a power supply circuit board inside the upper unit as a power supply for control. . Having an IH coil arranged below the top plate as the first heating source,
Inside the upper case, an inverter circuit board arranged below the IH coil and supplying high-frequency power to the IH coil; a cover installed between the IH coil and the inverter circuit board; a first cooling fan that introduces cooling air from a ventilation hole formed in the wall surface of the upper case,
The first cooling fan has a rotor that rotates about a vertical axis,
The first cooling fan faces an entrance of a first ventilation passage formed between the inverter circuit board and the cover, and the first cooling fan is located at one end of the first ventilation passage. 11. The built-in composite heating cooker according to claim 9 or 10, characterized in that cooling air is supplied from the inlet toward the outlet at the other end. A kitchen furniture comprising: a first heating source for heating an object to be heated via a top plate on which the object to be heated is placed; and a flat main body having an upper opening closed by the top plate. an upper unit supported by
A heating chamber to which microwaves are supplied, and a lower unit in which a microwave generation source is built in a lower case,
The upper case and the lower case constituting the outer shell of the main body are each formed of a thin metal plate,
A lateral vertical wall extending vertically is formed at the peripheral edge of the upper case,
The entire upper surface of the lower case is open, and the upper unit and the lower unit are connected in a state in which the upper case is fitted inside the opening,
The lower case includes an inverter circuit board that supplies high-frequency power to the microwave generation source, and a front cooling fan that is below the inverter circuit board and supplies cooling air to the inverter circuit board. , a rear cooling fan for supplying cooling air to the heat radiating part and an oven heating device for heating the heating chamber are arranged below the heat radiating part of the microwave generation source,
The operation of the first heating source, the microwave generation source, the oven heating device, the front cooling fan, and the rear cooling fan is controlled by an integrated control device on the upper unit side,
The built-in combined type heating characterized in that neither the front side cooling fan nor the rear side cooling fan is operated while the upper unit is performing heat cooking only with the first heating source. Cooking device. Kitchen furniture characterized by having an installation opening on the upper surface, wherein the built-in composite heating cooker according to any one of claims 1 , 9, 10 and 12 is installed in the installation opening. .

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