WO2022044719A1

WO2022044719A1 - High frequency heating cooker

Info

Publication number: WO2022044719A1
Application number: PCT/JP2021/028708
Authority: WO
Inventors: 周平野村; 浩二吉野; 倫未上田
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2020-08-25
Filing date: 2021-08-03
Publication date: 2022-03-03
Also published as: CN115720618A; JPWO2022044719A1

Abstract

This high frequency heating cooker is provided with a heating chamber, one or more microwave generators, a grill pan, one or more radiating units, and a control unit. The heating chamber has a top surface, a bottom surface, and a plurality of side surfaces. The one or more microwave generators generate microwaves. The grill pan can have an object to be heated placed thereon, and can be accommodated in the heating chamber. The one or more radiating units radiate the one or more microwaves from above the top surface and/or below the bottom surface. The control unit controls the one or more microwave generators. When viewed from above, the grill pan demarcates the interior of the heating chamber into a first region occupied by the grill pan and a second region not occupied by the grill pan. The control unit sets the radiation direction of the one or more microwaves to any of a plurality of directions including a direction toward the first region and a direction toward the second region.

Description

High frequency heating cooker

This disclosure relates to a high frequency heating cooker.

For example, Patent Document 1 discloses a microwave heating device that controls heating according to the state of the object to be heated.

The conventional microwave heating device includes a waveguide structure antenna that radiates microwaves, a rotation drive unit that rotates the waveguide structure antenna, and a control unit that controls the rotation drive unit. The control unit controls the direction of the microwave radiated from the waveguide structure antenna, and heats the object to be heated according to the state of the object to be heated.

Japanese Patent No. 6331024

However, there is still room for improvement in the above-mentioned conventional microwave heating device in that the object to be heated is appropriately heated. Therefore, an object of the present disclosure is to provide a high frequency cooking device capable of heating an object to be heated more appropriately.

The high frequency heating cooker of one aspect of the present disclosure includes a heating chamber, one or more microwave generators, a grill pan, one or more radiating parts, and a control part.

The heating chamber has a top surface, a bottom surface, and a plurality of side surfaces. The one or more microwave generators generate one or more microwaves. The grill pan is capable of placing an object to be heated and accommodating it in the heating chamber, and absorbs microwaves to generate heat.

The one or more radiating portions radiate the one or more microwaves from above the top surface or below the bottom surface. The control unit controls the one or more microwave generators.

When the inside of the heating chamber accommodating the grill plate is viewed from the top surface, the grill plate has at least the first region occupied by the grill plate and the grill plate. It is divided into a second area that is not occupied. The control unit has one or more radiation units having the radiation direction of the one or more microwaves in one of a plurality of directions including a direction toward the first region and a direction toward the second region. To be set to.

The high-frequency heating cooker of the present disclosure can heat the object to be heated more appropriately.

FIG. 1 is a schematic view of a high-frequency heating cooker according to the first embodiment of the present disclosure. FIG. 2 is a top view of the high-frequency heating cooker according to the first embodiment. FIG. 3 is a flowchart showing the operation of the high-frequency heating cooker according to the first embodiment. FIG. 4 is a schematic diagram of a high-frequency heating cooker according to the first modification of the first embodiment. FIG. 5 is a top view of the high-frequency heating cooker according to the second modification of the first embodiment in a state where the grill plate is removed. FIG. 6 is a schematic view of a high-frequency heating cooker according to a third modification of the first embodiment. FIG. 7 is a schematic view of a high-frequency heating cooker according to the second embodiment of the present disclosure. FIG. 8 is a schematic view of a high-frequency heating cooker according to the third embodiment of the present disclosure. FIG. 9 is a flowchart showing the operation of the high-frequency heating cooker according to the third embodiment. FIG. 10 is a schematic diagram of a high-frequency heating cooker according to the fourth embodiment of the present disclosure.

(Background to the technology of this disclosure)
In recent years, high frequency cookers can heat objects to be heated from above and below. When the object to be heated is heated from below, the object to be heated is placed on a grill pan housed in the heating chamber.

When the inside of the heating chamber accommodating the grill plate is viewed from the top surface, the inside of the heating chamber is divided into a first region and a second region by the grill plate. The first area is occupied by the grill pan. The second region is a gap formed between the side surface of the heating chamber and the grill pan, and is not occupied by the grill pan.

When microwaves are radiated from below toward the grill plate, the grill plate absorbs the microwave and generates heat. The heating element is heated from below by the heat of the heating element 10a. On the other hand, the object to be heated is heated from above by the microwave that reaches above the grill pan through the second region.

In such a high frequency heating cooker, the microwave that heats the grill plate does not contribute to the heating of the object to be heated from above. Therefore, the portion of the object to be heated that is in contact with the grill pan may be burnt before the inside of the object to be heated reaches the desired temperature.

The present inventors have studied a high-frequency heating cooker capable of setting the radiation direction of microwaves to any one of a plurality of directions including the direction toward the first region and the direction toward the second region. As a result, it was found that it is possible to heat the object to be heated more appropriately than before.

Based on these new findings, the present inventors have come up with the following techniques.

The high-frequency heating cooker of the first aspect of the present disclosure includes a heating chamber, one or more microwave generators, a grill pan, one or more radiating parts, and a control part.

With this configuration, controllability in heating can be improved. This makes it possible to heat the object to be heated more appropriately.

In the high-frequency heating cooker of the second aspect of the present disclosure, when the inside of the heating chamber accommodating the grill plate is viewed from the top surface, the grill plate and the plurality of side surfaces thereof are separated from the second region. A gap is formed between the side surface of the second region and the second region is larger than the gap.

With this configuration, it is possible to suppress the generation of sparks due to electric discharge between the grill pan and the plurality of side surfaces.

In the high-frequency heating cooker of the third aspect of the present disclosure, in the grill pan, the center of the grill pan is located closer to the at least one side surface of the plurality of side surfaces from the center of the lower surface of the heating chamber. Arranged like this.

With this configuration, the first region and the second region are formed according to the arrangement of the grill pan. This makes it possible to improve the controllability in heating. As a result, the object to be heated can be heated more appropriately.

In the high-frequency heating cooker of the fourth aspect of the present disclosure, the grill pan includes a heating element arranged on a surface opposite to the surface on which the object to be heated is placed.

With this configuration, the grill pan can heat the object to be heated from below.

In the high frequency heating cooker of the fifth aspect of the present disclosure, each of the one or more radiating parts includes a rotating antenna.

With this configuration, one or more radiating parts can radiate microwaves in multiple directions.

In the high-frequency heating cooker of the sixth aspect of the present disclosure, the plurality of radiating parts include a first radiating part and two radiating parts. The first radiation unit is arranged below or above the first region and radiates the microwave in the direction toward the first region. The second radiating portion is arranged below or above the second region and radiates the microwave in the direction toward the second region.

The high-frequency heating cooker of the seventh aspect of the present disclosure further includes a temperature detection unit configured to detect the temperature of the object to be heated. The control unit sets the radiation direction of the one or more microwaves based on the temperature detected by the temperature detection unit.

With this configuration, the control unit can change the radiation direction of microwaves based on the temperature of the object to be heated. This makes it possible to improve the controllability in heating. As a result, the object to be heated can be heated more appropriately.

The high frequency heating cooker of the eighth aspect of the present disclosure further includes an input unit configured to input cooking information. The control unit sets the radiation direction of the one or more microwaves based on the cooking information.

With this configuration, the control unit can change the radiation direction of the microwave based on the cooking information. This makes it possible to improve the controllability in heating. As a result, the object to be heated can be heated more appropriately.

In the high frequency heating cooker of the ninth aspect of the present disclosure, the lower surface has a marking for positioning the grill pan in the heating chamber.

With this configuration, the grill pan can be easily positioned in the heating chamber.

The high-frequency heating cooker of the tenth aspect of the present disclosure further has a frame for positioning the grill pan in the heating chamber.

The high frequency heating cooker of the eleventh aspect of the present disclosure further has a support leg for positioning the grill pan in the heating chamber.

The high-frequency heating cooker of the twelfth aspect of the present disclosure further has an uneven portion for fixing the support leg on the lower surface of the heating chamber.

The high-frequency heating cooker of the thirteenth aspect of the present disclosure further has a heater arranged on the top surface for heating the heating object.

With this configuration, the object to be heated can be heated from above using a heater.

In the high-frequency heating cooker of the 14th aspect of the present disclosure, the grill plate is the first grill plate. The high-frequency heating cooker can be accommodated in the heating chamber and further includes a second grill pan for absorbing microwaves and generating heat. The second grill plate is placed on top of the first grill plate.

With this configuration, the first grill plate and the second grill plate can heat the object to be heated from below and above, respectively.

(Embodiment 1)
The high-frequency heating cooker according to the first embodiment of the present disclosure will be described. In the following description, a microwave oven, which is an example of the high-frequency heating cooker according to the first embodiment, will be described. However, the high frequency heating cooker is not limited to the microwave oven.

[overall structure]
FIG. 1 is a schematic diagram showing an example of a high-frequency heating cooker 1. FIG. 2 is a top view of the inside of the heating chamber 2 as seen from the top surface 2a of the heating chamber 2 of the high-frequency heating cooker 1.

As shown in FIGS. 1 and 2, the high-frequency heating cooker 1 includes a heating chamber 2, a microwave generator 3, a waveguide 7, a radiation unit 4, a control unit 5, and a temperature detection unit 6. , A grill plate 10 is provided. The grill pan 10 is used to place the object 20 to be heated. The object 20 to be heated is a food material such as meat, frozen food, and processed food.

<Heating room>
The heating chamber 2 has a top surface 2a, a bottom surface 2b, and a plurality of side surfaces. Specifically, the heating chamber 2 is a rectangular parallelepiped having four side surfaces (side surfaces 2c, 2d, 2e, 2f). One of the four sides (side 2e) is the door.

The lower surface 2b is flat as a whole so that the user can easily take in and out the object 20 to be heated and wipe off the dirt adhering to the lower surface 2b. A grill plate 10 can be arranged on the lower surface 2b of the heating chamber 2.

A radiation unit 4, which will be described later, is arranged below the lower surface 2b. The lower surface 2b is made of a material that easily transmits microwaves, for example, glass or ceramic.

The top surface 2a and the side surfaces 2c to 2f suppress the leakage of microwaves. The top surface 2a and the side surfaces 2c to f are formed of a material that reflects microwaves well, for example, a metal material such as an aluminum-plated steel plate or stainless steel.

<Microwave generator>
The microwave generator 3 generates microwaves for heating the object 20 to be heated. For example, the microwave generator 3 is a magnetron. In the first embodiment, the microwave generator 3 is arranged below the lower surface 2b of the heating chamber 2.

<Waveguide>
The waveguide 7 is connected to the microwave generator 3 and the radiation unit 4, and transmits the microwave generated by the microwave generator 3 to the radiation unit 4. The waveguide 7 may be a hollow metal tube. In the first embodiment, the waveguide 7 is arranged below the lower surface 2b of the heating chamber 2.

<Radiation part>
The radiation unit 4 radiates the microwave transmitted to the waveguide 7 into the heating chamber 2. In the first embodiment, the radiation unit 4 includes a rotating antenna 4a and a motor 4b. By rotating the rotating antenna 4a by the motor 4b, the radiating unit 4 can change the radiating direction of the microwave. In the first embodiment, the radiating portion 4 is arranged below the center of the lower surface 2b of the heating chamber 2.

<Control unit>
The control unit 5 is arranged below the lower surface 2b of the heating chamber 2. The control unit 5 includes a memory (not shown) for storing a program and a processor (not shown) having a CPU (central processing unit). The control unit 5 is electrically connected to the microwave generator 3 and the motor 4b.

The control unit 5 generates microwaves in the microwave generator 3 based on the temperature of the object 20 to be heated, and adjusts the output power.

The control unit 5 drives the motor 4b to rotate the rotating antenna 4a, and changes the radiation direction of the microwave from the rotating antenna 4a. The rotating antenna 4a radiates microwaves in two or more directions. For example, as shown in FIG. 1, the rotating antenna 4a radiates microwaves in the direction A toward the first region R1 shown in FIG. 2 and the direction B toward the second region R2 shown in FIG. The first region R1 and the second region R2 will be described later.

The grill plate 10 absorbs microwaves radiated in the direction A and generates heat. The object 20 to be heated is heated by the heat from the grill plate 10. The microwave radiated in the direction B is reflected by the side surface of the heating chamber 2 in the second region R2, irradiates the heating object 20 from above, and dielectrically heats the heating object 20.

The control unit 5 may direct the rotating antenna 4a toward the direction A or the direction B, and may swing the rotating antenna 4a in small steps around the direction A or the direction B. For example, the width of this swing is 15 degrees. That is, the control unit 5 causes the radiation unit 4 to set the radiation direction of the microwave to any one of a plurality of directions including the direction A and the direction B.

The control unit 5 controls the microwave generator 3 and the radiation unit 4 according to the state of the object 20 to be heated. The control unit 5 grasps the state of the heating object 20 based on the temperature of the heating object 20 detected by the temperature detecting unit 6 during heating. The temperature detection unit 6 will be described later.

<Temperature detector>
The temperature detection unit 6 detects the temperature of the object to be heated 20. The temperature detection unit 6 may detect the temperature of the object to be heated 20 as a two-dimensional temperature distribution. The temperature detection unit 6 may detect the temperature on the side surface of the heating chamber 2, which is not the object 20 to be heated. For example, the temperature detection unit 6 is an infrared sensor. The temperature detection unit 6 does not necessarily have to be an infrared sensor, and may be, for example, a temperature probe that directly detects the temperature of the object to be heated 20.

The temperature detection unit 6 may intermittently detect the temperature at intervals of, for example, 0.1 seconds.

<Grill plate>
The object 20 to be heated is placed on the grill plate 10. The grill pan 10 has a shallow bowl-like shape with the center recessed downward. In the first embodiment, the grill pan 10 has a quadrangular shape when viewed from the top surface 2a.

The grill pan 10 is made of a metal having high thermal conductivity such as aluminum. The grill pan 10 includes a heating element 10a applied to a surface opposite to the surface on which the object 20 to be heated is placed. The heating element 10a is, for example, a ferrite that absorbs microwaves and generates heat. The grill pan 10 heats the object 20 to be heated from below using the heat of the heating element 10a.

The grill plate 10 is smaller than the lower surface 2b of the heating chamber 2 so that it can be accommodated in the heating chamber 2. The grill pan 10 has an area of 1/4 or more and 2/3 or less of the area of the lower surface 2b. The grill pan 10 preferably has an area of half the area of the lower surface 2b.

In the heating chamber 2, support legs 12 for supporting the grill plate 10 are arranged so that the grill plate 10 is arranged above the lower surface 2b.

The support leg 12 includes four rod-shaped members. The four rod-shaped members are arranged near the four corners of the grill plate 10 and extend from the vicinity of the four corners of the grill plate 10 toward the lower surface 2b. The support legs 12 have a size that can be accommodated in the heating chamber 2. The support leg 12 has a height of 1/4 or more and 3/4 or less of the height of the side surfaces 2c to 2f. The support legs 12 preferably have a height of half the height of the sides 2c-2f. In this case, the microwave can more appropriately heat the object 20 to be heated from above and below.

The arrangement of the grill plate 10 in the heating chamber 2 will be described with reference to FIG.

As shown in FIG. 2, the side surface 2e and the side surface 2f are arranged so as to face each other in the depth direction. The side surface 2d and the side surface 2c are arranged so as to face each other in the lateral direction. When the inside of the heating chamber 2 is viewed from the top surface 2a, the heating chamber 2 has a first region R1 in which the grill plate 10 is arranged and a second region R2 in which the grill plate 10 is not arranged.

In FIG. 2, the grill plate 10 is arranged in the vicinity of the side surfaces 2c, 2e, and 2f. Therefore, the first region R1 is formed in the vicinity of the side surfaces 2c, 2e, and 2f. The second region R2 is a region on the left half of the heating chamber 2 surrounded by the side surfaces 2d, 2e, and 2f of the heating chamber 2.

In the present embodiment, as shown in FIG. 1, the direction from the rotating antenna 4a toward the first region R1 is defined as the direction A, and the direction from the rotating antenna 4a toward the second region R2 is defined as the direction B. As described above, the microwave radiated in the direction A is absorbed by the grill pan 10. The microwave radiated in the direction B is reflected by the side surface of the heating chamber 2 in the second region R2 and irradiates the heated object 20 from above.

Three gaps R3 for preventing sparks due to electric discharge are formed between the grill plate 10 and the side surface 2c, between the grill plate 10 and the side surface 2e, and between the grill plate 10 and the side surface 2f. The gap R3 can suppress the generation of sparks due to electric discharge between the grill pan 10 and the side surfaces 2c, 2e, and 2f, and can improve the safety of the high-frequency heating cooker 1.

The gap R3 between the grill plate 10 and the side surface 2c has a width T1. The gap R3 between the grill pan 10 and the side surface 2f has a width T2. The gap R3 between the grill pan 10 and the side surface 2e has a width T3.

Each of the widths T1, T2, and T3 is preferably 5 mm or more and 10 cm or less, and more preferably 10 mm or more and 5 cm or less. The three gaps R3 are not always necessary, and at least one of the three gaps R3 may be provided. If a gap of 5 mm or more is provided between the grill plate and the side surface, or if the grill plate and the side surface are in complete contact with each other, sparks due to electric discharge are unlikely to occur.

The magnitude relationship between the regions R1, R2 and the gap R3 will be described. In the present embodiment, the size of the regions R1, R2 and the gap R3 is the area seen from the top surface 2a. The second region R2 is larger than the gap R3. The second region R2 is sufficiently larger than the gap R3 and has the same size as the first region R1.

In this case, when the rotating antenna 4a radiates microwaves while rotating, the amount of microwaves radiated in direction A is equivalent to the amount of microwaves radiated in direction B. Therefore, the object 20 to be heated can be heated in the same manner from below and above.

That is, the object 20 to be heated can be heated in the same manner from below and above without adjusting the time for pointing the rotating antenna 4a toward each of the regions R1 and R2. As a result, the object to be heated 20 can be heated more appropriately.

For example, the area ratio of the second region R2 to the first region R1 is 0.8 or more and 1.2 or less. The area ratio of the gap R3 to the first region R1 is 0.05 or more and 0.3 or less.

The grill plate 10 is arranged away from at least one side surface of the side surfaces 2c to 2f and close to the remaining one or more side surfaces of the side surface 2c to 2f. As shown in FIG. 2, the grill pan 10 is arranged far from the side surface 2d and near the side surface 2c. That is, the center of the grill pan 10 is located closer to at least one side surface (here, the side surface 2c) of the plurality of side surfaces (side surfaces 2c, 2d, 2e, 2f) from the center of the lower surface 2b of the heating chamber 2. Arranged like this.

By such an arrangement of the grill plate 10, a second region R2 in which the grill plate 10 is not arranged is formed. The microwave is reflected by the side surface of the heating chamber 2 in the second region R2 and irradiates the heated object 20 from above. The larger the second region R2, the greater the amount of microwaves irradiating the grill pan 10 from above.

[motion]
An example of the operation of the high-frequency heating cooker 1 will be described. FIG. 3 is a flowchart showing the operation of the high-frequency heating cooker 1 when heating frozen food.

In step S11, the control unit 5 directs the radiation unit 4 to the second region R2. That is, the control unit 5 operates the motor 4b of the radiation unit 4 to set the direction of the rotary antenna 4a in the direction B.

In step S12, the control unit 5 generates microwaves in the microwave generator 3 and starts heating the object 20 to be heated. The microwave is transmitted to the radiation unit 4 by the waveguide 7. The rotating antenna 4a radiates microwaves in the direction B.

The microwave is reflected by the side surfaces 2c to 2f and the top surface 2a in the second region R2. The object 20 to be heated is dielectrically heated by microwaves irradiating from above due to this reflection.

In step S13, the temperature detection unit 6 detects the temperature K of the object to be heated 20. In step S14, the control unit 5 determines whether or not the temperature K is equal to or higher than the first threshold value. When the temperature K is less than the first threshold value (No in step S14), in step S15, the control unit 5 continues to radiate microwaves in the direction B.

When the temperature K detected by the temperature detection unit 6 is equal to or higher than the first threshold value (Yes in step S14), in step S16, the control unit 5 directs the radiation unit 4 toward the first region R1. That is, the control unit 5 operates the motor 4b of the radiation unit 4 to change the direction of the rotary antenna 4a from the direction B to the direction A. The rotating antenna 4a radiates microwaves in the direction A.

The grill plate 10 absorbs the microwave and generates heat to heat the object 20 to be heated from below. As a result, the lower part of the object to be heated 20 can be colored.

In step S17, the temperature detection unit 6 detects the temperature K of the object to be heated 20. In step S18, the control unit 5 determines whether or not the temperature K is equal to or higher than the second threshold value. In this embodiment, the second threshold is larger than the first threshold.

When the temperature K is less than the second threshold value (No in step S18), in step S19, the control unit 5 continues to radiate microwaves in the direction A. When the temperature K is equal to or higher than the second threshold value (Yes in step S18), the control unit 5 ends the heating operation.

For example, when thawing the object to be heated, the first threshold value is 10 ° C., and when baking the object to be heated, the second threshold value is 80 ° C. The first threshold is set to any value in the range of 0 ° C to 20 ° C depending on the object to be heated and the heating course. The second threshold is set to any value in the range of 70 ° C to 90 ° C depending on the object to be heated and the heating course.

[effect]
According to the high-frequency heating cooker 1 according to the first embodiment, the following effects can be obtained.

The high-frequency heating cooker 1 includes a heating chamber 2, a microwave generator 3, a grill plate 10, a radiating unit 4, and a control unit 5. The heating chamber 2 has a top surface 2a, a bottom surface 2b, and side surfaces 2c to 2f. The microwave generator 3 generates microwaves. The grill plate 10 can place an object to be heated and can be accommodated in the heating chamber 2, and absorbs microwaves to generate heat.

The radiation unit 4 radiates microwaves from below the lower surface 2b. The control unit 5 controls the microwave generator 3. When the inside of the heating chamber 2 accommodating the grill plate 10 is viewed from the top surface 2a, the grill plate 10 places the inside of the heating chamber 2 at least in the first region R1 occupied by the grill plate 10 and the grill plate. It is partitioned into an unoccupied second region R2.

The control unit 5 causes the radiation unit 4 to set the direction in which the microwave is emitted to one of a plurality of directions including the direction A toward the first region R1 and the direction B toward the second region R2.

When the inside of the heating chamber 2 accommodating the grill plate 10 is viewed from the top surface 2a, a gap R3 is formed between the grill plate 10 and at least one side surface of the side surfaces 2c, 2e, and 2f, separately from the second region. Will be done. The second region R2 is larger than the gap R3.

With this configuration, the object to be heated 20 can be heated from above or below. Therefore, the controllability of heating by microwaves can be improved.

When the control unit 5 radiates the microwave to the radiation unit 4 in the direction A toward the first region R1, the grill pan 10 absorbs the microwave and generates heat, and heats the object 20 to be heated from below.

When the control unit 5 radiates the microwave to the radiation unit 4 in the direction B toward the second region R2, the microwave is reflected by the side surfaces 2c to 2f and the top surface 2a in the second region R2. The object 20 to be heated is dielectrically heated by microwaves irradiating from above due to this reflection.

The second region R2 is larger than the gap R3. Therefore, the amount of microwaves irradiating the heating object 20 from above is larger when the microwaves are radiated in the direction B than when the microwaves are radiated in the direction A. By increasing the size of the second region R2, the amount of microwaves irradiating the object to be heated 20 from above can be increased.

The grill pan 10 is placed away from at least one side surface (for example, side surface 2d) of the plurality of side surfaces 2c to 2f and close to the remaining one or more side surfaces (at least one of side surfaces 2c, 2e, 2f). Will be done.

Due to this arrangement of the grill pan 10, the second region R2 is formed in the vicinity of the side surface 2d, and the first region R1 is formed in the vicinity of at least one of the side surfaces 2c, 2e, and 2f. The object 20 to be heated can be irradiated with microwaves from above via the second region R2.

The grill pan 10 includes a heating element 10a arranged on a surface opposite to the surface on which the object 20 to be heated is placed.

The heating element 10a absorbs microwaves and generates heat. With this heat, the grill plate 10 can heat the object to be heated 20 placed on the grill plate 10.

The radiation unit 4 has a rotating antenna 4a. The rotating antenna 4a can radiate microwaves in any direction.

The high-frequency heating cooker 1 further includes a temperature detecting unit 6 configured to detect the temperature of the object to be heated 20. The control unit 5 sets the direction of radiating microwaves based on the detected temperature.

By detecting the temperature of the object to be heated 20, the controllability of heating can be further improved. For example, when the object 20 to be heated is a frozen food, microwaves are radiated in the direction B. The object 20 to be heated is heated from above and thawed. After that, when the microwave is radiated in the direction A based on the temperature of the object to be heated 20, the object to be heated 20 is heated from below. In this way, the object 20 to be heated can be efficiently colored.

The high frequency heating cooker 1 further has support legs 12 for determining the position of the grill plate 10 in the heating chamber 2. The user can arrange the grill plate 10 at an appropriate position by arranging the grill plate 10 on the support legs 12.

By arranging the grill plate 10 on the support legs 12, a space is formed between the grill plate 10 and the lower surface 2b. With this space, it is possible to prevent the lower surface 2b from being damaged even if the temperature of the grill plate 10 rises. As a result, the safety of the high frequency heating cooker 1 can be improved.

In the first embodiment, an example of the high-frequency heating cooker 1 is the simplest microwave oven. However, this disclosure is not limited to this. The high-frequency heating cooker 1 may be a microwave oven further having a heater arranged in the vicinity of the top surface 2a in order to heat the object 20 to be heated from above.

In the first embodiment, a gap R3 for preventing contact is formed between the grill pan 10 and the plurality of side surfaces 2c, 2e, and 2f of the heating chamber 2. A transmissive material through which microwaves can pass may be arranged in the gap R3.

In the first embodiment, the microwave generator 3 and the radiation unit 4 are arranged below the lower surface 2b. However, the microwave generator 3 and the radiation unit 4 may be arranged above the top surface 2a. This configuration will be described in the first modification described later.

In the first embodiment, the high frequency heating cooker 1 has one rotating antenna 4a. However, the high frequency heating cooker 1 may have a plurality of rotating antennas 4a.

In the first embodiment, the radiation unit 4 is arranged at the center of the lower surface 2b when viewed from above. However, the arrangement of the radiation unit 4 is not limited to this. The radiation unit 4 may be arranged so that the microwave emitted from the rotating antenna 4a is directed to the first region and the second region. For example, the radiating portion 4 may be arranged close to any of the side surfaces 2c to 2f.

As described above, the control unit 5 may direct the rotating antenna 4a toward the direction A or the direction B, and may swing the rotating antenna 4a in small steps around the direction A or the direction B. However, this swing is not always necessary. By not swinging the rotating antenna 4a, more local heating becomes possible.

In the first embodiment, both the direction A and the direction B are one direction. However, the direction A and the direction B may each include a plurality of directions.

Specifically, the direction A includes the directions A1, the direction A2, and the direction A3 that are different from each other, and the direction B includes the directions B1, the direction B2, and the direction B3 that are different from each other. In step S11 of FIG. 3, the control unit 5 sets the direction of the rotating antenna 4a to at least one of the directions B1 to B3. In step S16 of FIG. 3, the control unit 5 sets the direction of the rotating antenna 4a to at least one of the directions A1 to A3.

That is, the control unit 5 causes the radiation unit 4 to set the radiation direction of the microwave to one of a plurality of directions including the direction A and the direction B.

In the first embodiment, the grill plate 10 is arranged close to the side surface 2c, the side surface 2e, and the side surface 2f. However, the grill plate 10 may be arranged close to at least one side surface of the side surfaces 2c to 2f. For example, the grill plate 10 may be arranged close to the side surface 2c and the side surface 2f.

In the first embodiment, the microwave is radiated in the direction B toward the second region R2 and then in the direction A toward the first region R1. However, the microwave may be radiated in the direction A toward the first region R1 and then in the direction B toward the second region R2.

In the first embodiment, the support legs 12 are fixed to the lower surface 2b of the heating chamber 2. However, the support legs 12 may be fixed to the grill pan 10. This configuration will be described in the second modification described later.

In the first embodiment, the support legs 12 are fixed to the lower surface 2b of the heating chamber 2. However, the grill pan 10 may be positioned by means other than the support legs 12. For example, the frame structure may be arranged in the heating chamber 2, and the grill pan 10 may be arranged on the frame structure. This configuration will be described in the third modification described later.

(First modification)
FIG. 4 is a schematic view of the high-frequency heating cooker 1 according to the first modification of the first embodiment. As shown in FIG. 4, in the first modification, the microwave generator 3 and the radiation unit 4 are arranged above the top surface 2a.

In this configuration, when the microwave is radiated in the direction B toward the second region R2, the microwave is reflected by the side surfaces 2c to 2f and the lower surface 2b in the second region R2. The grill pan 10 absorbs microwaves radiated from below by this radiation to generate heat, and heats the object 20 to be heated from below.

When the microwave is radiated in the direction A toward the first region R1, the object 20 to be heated is dielectrically heated by the microwave radiated from above. According to the first modification, the same effect as that of the first embodiment can be obtained.

(Second modification)
In the second modification, the support legs 12 are directly attached to the grill pan 10. Therefore, the support legs 12 are taken out of the heating chamber 2 or put into the heating chamber 2 together with the grill plate 10.

FIG. 5 is a top view of the high-frequency heating cooker 1 according to the second modification of the first embodiment in a state where the grill plate 10 is removed. As shown in FIG. 5, in the second modification, the uneven portion 13 is provided on the lower surface 2b of the heating chamber 2 in order to position the lower end portion of the support leg 12. For example, the uneven portion 13 has a hole shape so that the lower end portion of the support leg 12 can be fitted.

With this configuration, the user can easily position the grill pan 10. That is, in a configuration in which the support legs 12 can be taken out of the heating chamber 2 or put into the heating chamber 2, the grill pan 10 and the support legs 12 can always be arranged at the same position.

In the second modification, the uneven portion 13 is arranged for positioning the support leg 12. However, other means may be used for positioning the support legs 12. For example, the lower surface 2b of the heating chamber 2 may be marked to position the grill pan 10 in the heating chamber 2.

With this marking, the user can easily position the grill plate 10. In a configuration in which the support legs 12 can be taken out of the heating chamber 2 or put into the heating chamber 2, the grill pan 10 and the support legs 12 can always be arranged at the same position.

(Third modification example)
FIG. 6 is a schematic diagram of a high-frequency heating cooker according to a third modification of the first embodiment. As shown in FIG. 6, the high frequency heating cooker 1 further includes a frame 22 for positioning the grill pan 10 in the heating chamber 2. The frame 22 is arranged so that the grill plate 10 is separated from the lower surface 2b of the heating chamber 2.

The frame 22 is formed of a plurality of rod-shaped members. For example, the frame 22 has a through hole defined by a plurality of rod-shaped members. This through hole is formed closer to the side surface 2c than to the side surface 2d. When the grill plate 10 is arranged in the through hole, the grill plate 10 is arranged in the heating chamber 2 in parallel with the top surface 2a and the bottom surface 2b. Microwaves can reach above the frame 22 through a portion of the frame 22 that is not provided with a through hole.

This configuration can reduce the risk of the user accidentally turning over the grill plate 10 as compared with the case of using the support legs 12. Protrusions for hooking and attaching the frame 22 may be provided at a plurality of different height positions on at least one of the side surfaces 2c to 2f. With this protrusion, the frame 22 can be removably arranged in the heating chamber 2.

With this configuration, the height position of the grill plate 10 in the heating chamber 2 can be adjusted. Rails and fixing mechanisms for mounting the frame 22 may be provided at a plurality of different height positions on at least one of the side surfaces 2c to 2f. Thereby, the same effect as the above-mentioned protrusion can be obtained.

(Embodiment 2)
The high-frequency heating cooker according to the second embodiment of the present disclosure will be described. The second embodiment mainly describes the differences from the first embodiment. In the second embodiment, the same or equivalent configurations as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 7 is a schematic diagram of the high-frequency heating cooker 1A according to the second embodiment of the present disclosure. The second embodiment is different from the first embodiment in that the high-frequency heating cooker 1A includes an input unit 35 and does not include a temperature detection unit 6.

As shown in FIG. 7, the high-frequency heating cooker 1A includes, for example, an input unit 35 composed of a touch panel. For example, the user inputs the cooking information of the heating object 20 by selecting a desired menu from the menu displayed on the touch panel.

Cooking information depends on the object to be heated 20. For example, the cooking information includes the type, amount, initial state, cooking method, etc. of the object 20 to be heated. Specifically, the cooking information includes menus such as "shumai, 4 pieces, frozen, warmed", "chicken, 200 g, refrigerated, grilled". The cooking information may include more detailed settings such as "toast baking".

[motion]
The control unit 5 changes the direction of radiating microwaves based on the cooking information input by the input unit 35. The control unit 5 further includes a storage medium (not shown). The storage medium stores in advance control information corresponding to cooking information.

When the cooking information is input by the input unit 35, the control unit 5 extracts the control information corresponding to the cooking information and controls the heating based on the control information. Specifically, the control unit 5 changes the direction of the rotating antenna 4a of the radiation unit 4 based on the control information corresponding to the input cooking information, as in the first embodiment.

For example, the frozen food is heated as the object to be heated 20 by using the high frequency cooking device 1A. First, the user inputs cooking information by the input unit 35. The control unit 5 starts a preset thawing process based on the cooking information.

The control unit 5 radiates microwaves in the direction B to the rotating antenna 4a. The microwave radiated in the direction B irradiates the object to be heated 20 from above to heat and thaw the object 20 to be heated.

When the thawing step is completed, the control unit 5 starts a preset baking step based on the cooking information. The control unit 5 causes the rotating antenna 4a to radiate microwaves in the direction A. The microwave radiated in the direction A irradiates the grill plate 10 from below to generate heat in the grill plate 10. This heat evaporates the water accumulated in the grill pan 10 in the thawing step. The lower surface of the object 20 to be heated may be burned by this heat.

[effect]
The high frequency heating cooker 1A further includes an input unit 35 for inputting cooking information. The control unit 5 sets the direction of radiating microwaves based on the cooking information.

In this configuration, the direction of radiating microwaves is set based on the input cooking information. Therefore, the heating target 20 can be appropriately heated without detecting the temperature of the heating target 20.

When the user inputs cooking information (for example, the degree of baking) by the input unit 35, it becomes possible to perform cooking according to the user's preference.

In the second embodiment, the high-frequency heating cooker 1A does not include the temperature detection unit 6 but includes the input unit 35. However, the high frequency heating cooker 1A may also include a temperature detecting unit 6. By using the temperature detection unit 6 and the input unit 35 in combination, the object to be heated 20 can be heated more appropriately.

For example, the control unit 5 controls heating based on the cooking information input by the input unit 35. The control unit 5 controls the radiation and the radiation direction of the microwave based on the temperature of the heating object 20 detected by the temperature detection unit 6 during heating.

In the second embodiment, the input unit 35 is composed of a touch panel. However, the input unit 35 may include a plurality of input buttons. In this case, the plurality of input buttons correspond to different cooking information.

In the second embodiment, the high frequency heating cooker 1A includes an input unit 35. However, the input unit 35 does not have to be included in the high frequency heating cooker 1A. The input unit 35 may be a touch panel that is independent of the high-frequency heating cooker 1A.

The high frequency heating cooker 1A may have a remote controller that functions as an input unit 35. The remote controller transmits cooking information selected by the user, and the high frequency heating cooker 1A receives the cooking information.

The smartphone may function as the input unit 35. Therefore, the high-frequency heating cooker 1A communicates cooking information with the smartphone. Specifically, the smartphone transmits cooking information using a dedicated application installed for operating the high-frequency heating cooker 1A.

(Embodiment 3)
The high-frequency heating cooker according to the third embodiment of the present disclosure will be described. The third embodiment mainly describes the differences from the first embodiment. In the third embodiment, the same or equivalent configurations as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 8 is a schematic diagram of the high-frequency heating cooker 1B of the third embodiment according to the present disclosure. The third embodiment is different from the first embodiment in that the high-frequency heating cooker 1B includes a plurality of microwave generators, a plurality of waveguides, and a plurality of radiation units. The third embodiment is different from the first embodiment in that the high-frequency heating cooker 1B includes a plurality of radiating portions having no rotating antenna instead of the radiating portion 4 having the rotating antenna 4a.

As shown in FIG. 8, the high-frequency heating cooker 1B includes a first microwave generator 43, a second microwave generator 53, a first radiating unit 44, a second radiating unit 54, and a first waveguide. A tube 47 and a second waveguide 57 are provided.

The first microwave generator 43 and the second microwave generator 53 have the same structure as the microwave generator 3 of the first embodiment, and are connected to the control unit 5. The first waveguide 47 and the second waveguide 57 have the same structure as the waveguide 7 of the first embodiment. The first waveguide 47 is connected to the first microwave generator 43 and the first radiation unit 44. The second waveguide 57 is connected to the second microwave generator 53 and the second radiation unit 54.

The first radiation unit 44 and the second radiation unit 54 are fixed and emit microwaves in one direction. The first radiation unit 44 and the second radiation unit 54 radiate microwaves transmitted by the first waveguide 47 and the second waveguide 57 into the heating chamber 2, respectively.

The first radiation unit 44 and the second radiation unit 54 are arranged below the lower surface 2b. Specifically, the first radiation unit 44 is arranged below the first region R1 and radiates microwaves in the direction A toward the first region R1. The second radiation unit 54 is arranged below the second region R2 and radiates microwaves in the direction B toward the second region R2.

[motion]
An example of the operation of the high-frequency heating cooker 1B will be described. FIG. 9 is a flowchart showing the operation of the high-frequency heating cooker 1B when heating frozen food.

In step S21, the control unit 5 starts heating by the second radiating unit 54. The control unit 5 generates microwaves in the second microwave generator 53 connected to the second radiation unit 54. The microwave is transmitted to the second radiating section 54 by the second waveguide 57. The second radiation unit 54 radiates microwaves in the direction B.

In step S22, the temperature detection unit 6 detects the temperature K of the object to be heated 20. In step S23, the control unit 5 determines whether or not the temperature K is equal to or higher than the first threshold value. When the temperature K is less than the first threshold value (No in step S23), in step S24, the control unit 5 continues to radiate microwaves in the direction B.

When the temperature K detected by the temperature detection unit 6 is equal to or higher than the first threshold value (Yes in step S23), in step S25, the control unit 5 ends the microwave radiation by the second radiation unit 54.

In step S26, the control unit 5 starts heating by the first radiation unit 44. The control unit 5 generates microwaves in the first microwave generator 43 connected to the first radiation unit 44. The microwave is transmitted to the first radiation unit 44 by the first waveguide 47. The first radiation unit 44 radiates microwaves in the direction A.

In step S27, the temperature detection unit 6 detects the temperature K of the object to be heated 20. In step S28, the control unit 5 determines whether or not the temperature K is equal to or higher than the second threshold value.

When the temperature K is less than the second threshold value (No in step S28), in step S29, the control unit 5 continues to radiate microwaves in the direction A.

When the temperature K is equal to or higher than the second threshold value (Yes in step S28), the control unit 5 ends the microwave radiation by the first radiation unit 44.

[effect]
The high-frequency heating cooker 1B includes a first radiating unit 44, a second radiating unit 54, and a control unit 5. The first radiating unit 44 radiates the microwave generated by the first microwave generator 43 from below the lower surface 2b of the heating chamber 2. The second radiating unit 54 radiates the microwave generated by the second microwave generator 53 from below the lower surface 2b of the heating chamber 2. The control unit 5 controls the first microwave generator 43 and the second microwave generator 53.

With this configuration, the heating object 20 can be heated more appropriately as in the first embodiment. Specifically, the control unit 5 sets the direction in which microwaves are emitted to the first radiation unit 44 and the second radiation unit 54 as a direction A toward the first region R1 and a direction B toward the second region R2. Set in one of multiple directions including. As a result, the third embodiment can have the same effect as that of the first embodiment.

The high frequency heating cooker 1B has a first radiating unit 44 and a second radiating unit 54. The first radiation unit 44 is arranged below the first region R1 and radiates microwaves in the direction toward the first region R1. The second radiation unit 54 is arranged below the second region R2 and emits microwaves in the direction toward the second region R2. With this configuration, the microwave radiation direction can be easily switched to either of the two directions.

In the third embodiment, the high-frequency heating cooker 1B includes a first microwave generator 43 and a second microwave generator 53. However, the high frequency heating cooker 1B may include three or more radiating portions. By providing more radiation units, it becomes easier to control the radiation direction of microwaves. In this case, the high-frequency heating cooker 1B includes a plurality of microwave generators corresponding to the number of radiating portions and a plurality of waveguides corresponding to the number of radiating portions.

(Embodiment 4)
The high-frequency heating cooker according to the fourth embodiment of the present disclosure will be described. In the fourth embodiment, the differences from the first embodiment will be mainly described. In the fourth embodiment, the same or equivalent configurations as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 10 is a schematic diagram of the high-frequency heating cooker 1C of the fourth embodiment according to the present disclosure. The fourth embodiment is different from the first embodiment in that the high-frequency heating cooker 1C includes a plurality of grill pans.

As shown in FIG. 10, the high-frequency heating cooker 1C further includes a grill pan 50 for a lid. The lid grill plate 50 has the same configuration as the grill plate 10. That is, the grill plate 50 for a lid has the same dimensions and shape as the grill plate 10, and includes a heating element 50a similar to the heating element 10a. The grill plate 50 for the lid is arranged so as to be overlapped with the grill plate 10. As a result, the object 20 to be heated can be accommodated in the space between the grill plate 10 and the grill plate 50 for the lid.

When the control unit 5 causes the rotating antenna 4a to radiate microwaves in the direction B toward the second region R2, the microwaves are reflected by the side surfaces 2c to 2f and the top surface 2a in the second region R2. The grill plate 50 for the lid absorbs microwaves radiated from above by this reflection and generates heat, and heats the object 20 placed on the grill plate 10 from above.

With this configuration, in the fourth embodiment, the object 20 to be heated is heated from below by the grill plate 10 and from above by the grill plate 50 for the lid. As a result, the same degree of baking can be obtained at the lower part and the upper part of the object 20 to be heated.

When toasting bread, first, the control unit 5 radiates microwaves to the rotating antenna 4a in the direction A toward the first region R1 to toast the lower part of the bread. Next, the control unit 5 causes the rotating antenna 4a to radiate microwaves in the direction B toward the second region R2 to toast the upper part of the bread.

Steam is generated when heating the lower part of the bread. Toast the top of the loaf a little longer than the bottom to blow off this steam. This makes it possible to toast both sides of the bread in the same way.

In the fourth embodiment, the grill plate 10 corresponds to the first grill plate, and the grill plate 50 for the lid corresponds to the second grill plate.

In the fourth embodiment, the grill plate 50 for the lid has the same shape and dimensions as the grill plate 10. However, this disclosure is not limited to this. For example, the depth of the grill plate 50 for the lid may be shallower than the depth of the grill plate 10. When the object 20 to be heated is housed in the space between the two grill plates so that both sides of the object 20 to be heated are in contact with the two grill plates, both sides can be colored.

The depth of the grill plate 50 for the lid may be deeper than the depth of the grill plate 10. In this case, the thick object 20 to be heated can be accommodated in the space between the two grill plates.

In the fourth embodiment, the grill pan 50 for the lid includes the heating element 50a. However, this disclosure is not limited to this. The grill pan 50 for the lid does not have to include the heating element 50a. In this case, different heating can be performed on the upper part and the lower part of the object 20 to be heated.

The high frequency heating cooker 1C may further include the input unit 35 of the second embodiment. In this configuration, the control unit 5 changes the direction of radiating microwaves according to the cooking information input by the user. In this case, it is not necessary to detect the temperature of the object 20 to be heated.

For example, when cooking chicken with skin, the user selects "chicken with skin" displayed on the touch panel which is the input unit 35. The user places the chicken on the grill plate 10 so that the skinned surface is in contact with the grill plate 10.

The control unit 5 radiates microwaves in the direction A to the rotating antenna 4a to generate heat in the grill pan 10. This heat bake the chicken skin. When the skin is burnt, the control unit 5 radiates microwaves in the direction B to the rotating antenna 4a to heat the grill pan 50 for the lid. This heat burns the unskinned side of the chicken. In this way, the high frequency cooker 1C can properly bake the surface and center of the chicken.

The technology disclosed in this disclosure is useful in microwave ovens and the like.

1, 1A, 1B, 1C High frequency heating cooker 2 Heating chamber

2a Top surface

2b Bottom surface

2c, 2d, 2e, 2f Side surface 3 Microwave generator 4 Radiation unit 4a Rotating antenna 4b Motor 5 Control unit 6 Temperature detector 7 Waveguide Tube 10

Grill dish

10a, 50a Heater 12 Support leg 13 Concavo-convex part 20 Heating object 22 Frame 35 Input part 43 1st microwave generator 44 1st radiation part 47 1st waveguide 50 Lid grill dish 53 2nd Microwave generator 54 2nd radiator 57 2nd waveguide

Claims

A heating chamber having a top surface, a bottom surface, and a plurality of side surfaces,
With one or more microwave generators configured to generate one or more microwaves,
A grill pan that can place a heating object and can be accommodated in the heating chamber and is configured to absorb microwaves and generate heat.
One or more radiating portions configured to radiate the one or more microwaves above or below the top surface.
A control unit configured to control the one or more microwave generators, and the like.
When the inside of the heating chamber accommodating the grill plate is viewed from the top surface, the grill plate occupies at least the inside of the heating chamber by the first region occupied by the grill plate and the grill plate. Separated into a second area that is not
The control unit has one or more radiation units having the radiation direction of the one or more microwaves in one of a plurality of directions including a direction toward the first region and a direction toward the second region. A high frequency heating cooker configured to be set to.
When the inside of the heating chamber accommodating the grill plate is viewed from the top surface, there is a gap between the grill plate and at least one side surface of the plurality of side surfaces, apart from the second region. The high frequency cooker according to claim 1, wherein the second region is formed and is larger than the gap.
The high frequency according to claim 2, wherein the grill plate is arranged so that the center of the grill plate is located closer to the at least one side surface of the plurality of side surfaces from the center of the lower surface of the heating chamber. Heating cooker.
The high-frequency heating cooker according to any one of claims 1 to 3, wherein the grill pan includes a heating element arranged on a surface opposite to the surface on which the object to be heated is placed.
The high-frequency heating cooker according to any one of claims 1 to 4, wherein each of the one or more radiating parts includes a rotating antenna.
The plurality of radiating parts are
A first radiating portion arranged below or above the first region and configured to radiate the microwave in a direction toward the first region.
A second radiating portion arranged below or above the second region and configured to radiate in a direction toward the second region.
The high frequency heating cooker according to any one of claims 1 to 5.
Further, a temperature detection unit configured to detect the temperature of the object to be heated is provided.
The invention according to any one of claims 1 to 6, wherein the control unit is configured to set the radiation direction of the one or more microwaves based on the temperature detected by the temperature detection unit. High frequency heating cooker.
It also has an input section configured to enter cooking information,
The high-frequency heating cooker according to any one of claims 1 to 6, wherein the control unit is configured to set the radiation direction of the one or more microwaves based on the cooking information.
The high-frequency heating cooker according to any one of claims 1 to 8, wherein the lower surface has a marking for positioning the grill plate in the heating chamber.
The high-frequency heating cooker according to any one of claims 1 to 9, further comprising a frame configured to position the grill pan in the heating chamber.
The high-frequency heating cooker according to any one of claims 1 to 9, further comprising support legs configured to position the grill pan in the heating chamber.
The high-frequency heating cooker according to claim 11, further comprising an uneven portion configured to fix the support legs on the lower surface of the heating chamber.
The high-frequency heating cooker according to any one of claims 1 to 12, further comprising a heater arranged on the top surface and configured to heat the object to be heated.
The grill plate is the first grill plate and
The high frequency cooker can be accommodated in the heating chamber and further comprises a second grill pan configured to absorb microwaves and generate heat.
The high-frequency heating cooker according to any one of claims 1 to 13, wherein the second grill plate is configured to be stacked on the first grill plate.