JP6749861B2 - Heat sink heating structure for heating cookers - Google Patents

Description

The present invention is a cooker body in which a cooking pot with an upper opening is arranged,
A lid body configured to be able to open and close an upper end opening of the cooker body, and in a closed posture in which the upper end opening is closed, a steam passage that communicates the inside and the outside of the cooking pot,
It has a communication hole that constitutes the inlet of the steam passage, is provided on the side of the lid facing the inside of the cooking pot, and comprises an inner lid for sealing the upper end opening of the cooking pot,
A heat dissipation surface portion along the upper surface of the inner lid; an outer peripheral wall portion rising from the vicinity of the outer periphery of the heat dissipation surface portion to the lid side; and a heat dissipation plate having a steam passage through hole through which the steam passage penetrates. The present invention relates to a radiator plate heating structure of a heating cooker including a lid side heating means on an upper surface of the radiator plate.

A heat dissipation plate heating structure of this type of cooking device is introduced in Patent Document 1.
This document discloses a technique in which a heater wire 5 is firmly attached to a heating plate 3 for heating a heat radiating plate 4 of which a flat portion is restricted due to miniaturization and high functionality of a heating cooker. ing.

In this technique, the heater wire 5 is attached by the aluminum foil 6. In the narrow portion where a sufficient flat surface for attaching the heater wire 5 cannot be ensured, a vertically deformed surface such as an inclined surface or a curved surface is formed, and the aluminum foil 6 is attached to this portion to widen it. Secure the attachment area (also the heat transfer area). The heater wire 5 is attached by extending aluminum foils 6 on both sides in the radial direction.

Conventionally, the heating amount required for this kind of lid side heating means has been about 40 W or less.

JP 2001-321266 A JP, 2013-236796, A

By the way, in recent years, the applicant of the present invention discloses in Patent Document 2 that a valve accommodating portion 33A for accommodating the pressure regulating valves 43A, 43B is provided on the inner diameter side of the heat radiating plate 24 in which the lid side heating means (lid heater 25) is arranged. 33B is provided, the steam unit 35 is connected to the downstream side of the storage chambers 33A and 33B, and the steam is exhausted from an exhaust port 36 provided in the steam unit 35.

In this configuration, the steam passages (the respective valve accommodating chambers 33A and 33B and the steam unit 35) that communicate the inside and the outside of the cooking pot 10 are provided under the lid body 19 and on the inner lid 27, but with the steam. When separating a liquid substance (particularly, oneba) flowing from the cooking pot 10 in this steam passage, it is preferable that the steam passage be a bent passage.

When attempting to separate the liquid substance from the vapor in this way, it is necessary to make the structure of the vapor passage as complicated as possible, but when trying to form a bent path capable of achieving the purpose within a limited volume, Naturally, the occupied volume of the vapor passage constituting member increases, and the volume (area in plan view) that can be assigned to the lid side heating means is limited.

On the other hand, with respect to the lid side heating means, there is a demand to increase the heating amount to about twice that of the conventional case for the purpose of enhancing its heat retaining function. In this case, it is conceivable to increase the amount of heat generated per unit length of the heater wire that constitutes the lid side heating means, but the amount of heat generated per unit length (W/ Since there is a limitation in m), it becomes necessary to increase the length of the heater wire.
For example, if it is attempted to double the heating amount, the line length becomes double the current line length of the heater wire, and the conventional pasting structure cannot cope with this. That is, since the diameter of the heat radiating plate 24 is not generally large, it is necessary to double the length of the heater wire, that is, so-called double winding.
Thus, in the case of double winding, the conventional structure cannot substantially cope with the problem.

In view of the above situation, the main problem of the present invention is that even if the occupied volume is increased to complicate the steam passage, the required heating amount can be secured, and it is possible to cope with the high heating required for the lid side heating means. The point is to provide a heat sink heating structure for a cooking device.

To achieve the above purpose,
A cooker body in which a cooking pot with an upper opening is arranged,
A lid body configured to be able to open and close an upper end opening of the cooker body, and in a closed posture in which the upper end opening is closed, a steam passage that communicates the inside and the outside of the cooking pot,
It has a communication hole that constitutes the inlet of the steam passage, is provided on the side of the lid facing the inside of the cooking pot, and comprises an inner lid for sealing the upper end opening of the cooking pot,
A heat dissipation surface portion along the upper surface of the inner lid; an outer peripheral wall portion rising from the vicinity of the outer periphery of the heat dissipation surface portion to the lid side; and a heat dissipation plate having a steam passage through hole through which the steam passage penetrates. The characteristic configuration of the radiator plate heating structure of the heating cooker provided with the lid side heating means on the upper surface of the radiator plate is:
The heating portion of the lid side heating means is configured to include a heater wire that generates heat in an energized state, and a heat transfer material portion that covers at least the heater wire, and the heat transfer material portion circulates around the heater wire. and a projecting portion projecting on one side of the parts and the heater wire, in the configuration wherein the heater wire is that attached to the outer peripheral wall portion of the heat radiating plate via the projecting portion,
In the one outer peripheral wall heating part having the through hole for the steam passage on the inner peripheral side, the heater wire is located close to the heat dissipation surface part, and the projecting part is separated from the heat dissipation surface part. Between the wall portion and the steam passage through hole, the single heater wire is attached to the outer peripheral wall portion via the projecting portion,
An opposing heating unit is provided at a portion facing the one outer peripheral wall heating unit with the steam passage through-hole interposed therebetween.
It is a point that an inner peripheral side heating section is provided on the inner peripheral side of the other outer peripheral wall heating section provided in the opposite side heating section, and a temperature sensor and a temperature fuse are provided.

According to this configuration,
In the configuration in which the heater wire is provided with the heat transfer member portion, the heat transfer member portion has a winding portion and a projecting portion protruding from the winding portion to one side. The mounting portion of the projecting portion is the outer peripheral wall portion of the heat dissipation plate. As a result, the outer peripheral wall heating unit can extremely reduce the thickness along the heat radiating surface portion occupied by the portion (thickness in plan view, for example, the thickness of the Z1 portion shown in FIG. 4). Therefore, it is possible to appropriately provide a heating unit that performs a predetermined heating function in the restricted place.
Further, in one of the outer peripheral wall heating parts, a heater wire is located close to the heat radiating surface part, and a projecting part is separated from the heat radiating surface part. By adopting a structure in which the heater wire is attached to the outer peripheral wall portion of the heat radiating plate via the projecting portion, the heater wire is attached utilizing a narrow space between the steam passage through hole and the outer peripheral wall portion.

Further, the one outer peripheral wall heating unit, and an opposing heating unit on the side facing the steam passage through hole,
The inner peripheral side heating part is provided on the inner peripheral side of the other outer peripheral wall heating part provided in the facing side heating part, and the temperature sensor and the temperature fuse are provided.

As a result, by providing the heating section on the opposite side with the heating section on the inner peripheral side in addition to the heating section on the other outer peripheral wall, a heating section with a double winding structure can be configured at a predetermined circulating portion (opposing side heating section) , and the wire length It is possible to cope with an increase in the heating amount of increasing the heating time.
Further, since the opposing heating unit is provided on the opposite side of the one outer peripheral wall heating unit with the vapor passage through-hole interposed, an inner heating unit is provided, and further a temperature sensor and a temperature fuse are provided. You can

Characteristic configuration of the heat dissipation plate heating structure of the heating cooker according to the present invention,
The inner peripheral side heating section, a heater wire for generating heat by energization, in that it is configured with a heat transfer material portion covering the heater wire.

According to this configuration, it is possible to satisfactorily heat the radiating surface portion through the heat transfer material portion even in the inner heating portion.

According to this configuration, it is possible to dispose a functional part required for the lid side heating means in the facing heating part, and it is possible to achieve uniform heating in this part.

(EN) Provided is a radiator plate heating structure of a heating cooker capable of accommodating a high heating required for a lid side heating means and securing a necessary heating amount even if an occupied volume thereof is increased to complicate a steam passage. I was able to.

It is an embodiment of the heat dissipation plate heating structure of the heating cooker according to the present invention, a side view of the entire rice cooker shown with a part cut away, A view of the heat sink of the rice cooker as seen from the cooking pot side (a diagram showing the configuration of the steam passage together with the arrangement of the pressure regulating valve, with the inner lid and inner lid cover removed) (A) The figure which shows arrangement|positioning and sticking structure of the lid heater in a heat sink, (b) The figure which shows the IIIb-IIIb cross section of Fig.3 (a). Sectional drawing which shows the detail of the IV area|region of FIG.3(a) (a partial enlarged view is included). Sectional drawing (including a partially enlarged view) which shows another embodiment of the lid heater of a double winding structure.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a pressure type rice cooker 100 which is a heating cooker according to an embodiment of the present invention.
This rice cooker 100 is attached to a rice cooker main body (cooker main body) 11 that detachably accommodates a bottomed cylindrical inner pan (cooking pan) 10 having an upper end opening, and an openable/closable rice cooker main body 11. And a lid 19.

The rice cooker main body 11 includes an outer casing including a tubular body 12 having upper and lower ends opened, a bottom body 13 closing the lower end opening of the body 12, and a shoulder body 14 attached so as to cover the upper end opening of the body 12. It has a body. An opening is provided in the substantially central portion of the shoulder body 14, and the lower side of this opening serves as a housing portion for the inner pot 10. Below the inner pot 10, an induction heating coil 15, which is a main body side heating means for inductively heating the bottom of the inner pot 10, is arranged.

The lid 19 includes an exterior body having an upper plate 20 and a lower plate 21, and covers the upper part of the rice cooker body 11. An opening operation member 22 for opening the lid 19 is provided on the front side of the upper plate 20, and a lock mechanism (not shown) for maintaining the closed state of the rice cooker body 11 is provided therein. Has been. The lower plate 21 is rotatably attached to a hinge connection portion 23 formed on the back of the rice cooker body 11.

A heat radiating plate 24 is disposed on the lower (inner) side surface of the lower plate 21 located on the inner pan 10 side in the closed state shown in FIG. A lid heater 25, which is a lid-side heating means for heating the inside of the inner pot 10, is disposed on the upper surface of the heat dissipation plate 24. As will be described later, the lid heater 25 is arranged so as to avoid the steam passage through hole 24a for arranging each component and to bypass the steam passage through hole 24a.

An inner lid 27 that closes the upper end opening of the inner pot 10 is detachably disposed on the inner surface side of the heat dissipation plate 24 that faces the inner pot 10. The inner lid 27 is made of a metal plate larger than the heat radiating plate 24, and a seal member 28 for sealing the inner peripheral portion of the upper end opening of the inner pot 10 is fixed to the outer peripheral portion through a frame member 29. The frame member 29 is provided with an engaging portion (not shown) that is engaged with an engaged portion (not shown) formed on the lower plate 21. In the present embodiment, the inner lid cover 66 is provided on the inner pot 10 side (lower side) of the inner lid 27, but the inner lid cover 66 will be described later.

A steam passage 32 for discharging the steam s generated inside the inner pot 10 to the outside is formed on the lower portion of the lid body 19 and on the inner lid 27. In the normal state, the inlet of the steam passage 32 serves as the communication hole 46 of the low pressure side pressure regulating valve 43 arranged in the inner lid 27.

Now, FIG. 1 shows a cross section in the width direction in which the pressure regulating valve 43 on the low pressure side is arranged in the rice cooker 100. On the other hand, FIG. 2 is a view of the radiator plate 24 with the inner lid 27 and the inner lid cover 66 removed, as seen from the inner pot 10 side. The flow of the steam s generated in the inner pot 10 is shown in FIGS. 1 and 2.

In the rice cooker 100 of the present embodiment, the low pressure side pressure regulating valve 43 shown in cross section in FIG. 1 is attached to the inner lid 27, and the high pressure side pressure regulating valve 43h is the same as the low pressure side pressure regulating valve 43. Prepared on the back side. In FIG. 2, each pressure regulating valve 43, 43h is shown by an imaginary line (two-dot chain line) with respect to the steam passage 32 which is the flow direction of the steam s.

The steam passage 32 formed on the inner lid 27 includes a first chamber 32a as a valve accommodating chamber for the pressure regulating valves 43 and 43h, and a second chamber 32b connected to the first chamber 32a on the downstream side. It is configured to be provided in the front-back direction (the left-right direction in FIG. 1) of the container 100. An exhaust passage 35 is provided on the lower side of the steam passage 32 of the second chamber 32b so as to penetrate the lid 19, and the steam s is exhausted from an exhaust port 36 which is an outer end thereof.

Further, as is clear from FIG. 2, the first chamber 32a houses the low pressure side first chamber 32a1 which houses the pressure regulating valve 43 (low pressure side pressure regulating valve) shown in FIG. 1 and the high pressure side pressure regulating valve 43h. The high pressure side first chamber 32a2 is provided.
In a normal state, the path of the steam s passing between the chambers is roughly the low-pressure side pressure regulating valve 43, the low-pressure side first chamber 32a1, the high-pressure side first chamber 32a2, and the second chamber 32b.

When the pressure in the inner pot 10 rises excessively, the steam s directly flows from the high pressure side pressure regulating valve 43h into the high pressure side first chamber 32a2 and flows into the second chamber 32b along with the flow passing through the above path. ..

Regarding the rice cooker 100 of the present embodiment, the flow of the steam s in the normal state will be described. The steam s in the inner pot 10 flows between the inner lid cover 66 and the inner lid 27 via the inner lid cover 66. , Through the pressure regulating valve 43 provided in the inner lid 27, and flows into the first chamber 32a. Specifically, the low pressure side pressure regulating valve 43 flows into the low pressure side first chamber 32a1 and flows in the rice cooker width direction which is the back side of the paper surface of FIG. 1 to accommodate the high pressure side pressure regulating valve 43h. It flows into the chamber 32a2. The advection between these chambers 32a1 and 32a2 is near the upper side of the inner lid 27. After that, the steam s rising in the high pressure side first chamber 32a2 escapes upward through an opening ho provided on the top surface of the chamber 32a2, flows to the rear side of the rice cooker 100, and flows into the second chamber 32b. .. Then, it passes through the second chamber 32b, flows into the exhaust passage 35 that is detachably arranged on the upper plate 20, passes through the exhaust passage 35, and is discharged from the exhaust port 36 to the outside.
That is, in the present embodiment, the steam passage 32 is a path that passes through the first chamber (the low-pressure side first chamber 32a1, the high-pressure side first chamber 32a2), the second chamber 32b, and the exhaust passage 35 above the inner lid 27. ing. In this steam passage 32, the advection between the low pressure side first chamber 32a1 and the high pressure side first chamber 32a2 is near the upper side of the inner lid 27, and the advection between the high pressure side first chamber 32a2 and the second chamber 32b. Flows through the opening ho provided on the top surface of the high-pressure side first chamber 32a2 and flows from the opening ho to the second chamber 32b located at the rear side, and thus has a complicated bending path.

The valve mechanism provided at the inlet of the steam passage 32 will be described by taking the pressure adjusting valve 43 on the low pressure side as an example.
As shown in FIG. 1, a pressure regulating valve 43 is provided on the upper surface side of the inner lid 27, and these can increase the pressure inside the inner pot 10 to a set pressure higher than atmospheric pressure.

The pressure regulating valve 43 is arranged above the inner lid 27 in the first chamber 32a (specifically, the low pressure side first chamber 32a1) formed on the inner lid 27. The pressure regulating valve 43 includes a valve seat 45 arranged from the lower side, which is the inner pan 10 side with respect to the inner lid 27, and a cover 48 is provided on the valve seat 45. The cover 48 is provided with a vent hole 49 communicating with the low pressure side first chamber 32a1.

Further, in the pressure regulating valve 43, a valve body 51 for closing the communication hole 46 inside the cover 48, an operation receiving member 52 for moving the valve body 51 to the closed position (downward), and an arrangement between them are provided. And the installed spring 53.
The valve body 51 closes the communication hole 46 with the valve body 51 via the spring 53 when the operation receiving member 52 is moved downward by the driving of the stepping motor M which is the driving means. Further, by adjusting the movement amount (biasing force) of the operation receiving member 52, the pressure inside the inner pan 10 can be increased within the range of 1.00 to 1.30 atm.

On the other hand, the high pressure side pressure regulating valve 43h is the same in that the arrangement position thereof is the high pressure side first chamber 32a2 described above, and is arranged above the inner lid 27. There is no difference in that the valve seat, the cover, and the ventilation hole (not shown) that communicate with the first chamber 32a2 on the high-pressure side are provided. However, the pressure regulating valve 43h on the high-pressure side has a function of opening the valve when the pressure in the inner pot 10 reaches the maximum pressure, so that the valve is closed by abutting against the valve seat in the normal state and the inner pot is closed. A ball-shaped weight (not shown) that floats up by the vapor pressure when the pressure inside 10 rises is provided, and the high-pressure side pressure regulating valve 43h is opened in the state where this weight floats up. The adjustment pressure of the high-pressure side pressure regulating valve 43h (the pressure when the closed state changes to the open state) can be set to the maximum adjustment pressure of the low-pressure side pressure regulating valve 43, which is 1.30 atm in the above example.

The inner lid cover 66 is mounted on the side of the inner lid 27 that faces the inside of the inner pot 10, and prevents the communication hole 46 of the pressure regulating valve 43, which is the inlet of the steam passage 32, from being clogged. The inner lid cover 66 is made of stainless steel, and is formed in a disc shape having substantially the same diameter as the heat radiating plate 24 so as to cover the lower side of the lid heater 25 in a plan view.

As described above, the steam s generated by heating the inner pot 10 flows into the inner lid cover 66 from the ventilation portion 71 provided on the side portion of the inner lid cover 66.

The above is the outline of the rice cooker 100 (an example of a heating cooker) according to the present invention.
Therefore, this heating cooker has the following structure.

Hereinafter, the “radiating plate heating structure”, which is the structure for attaching the lid heater 25 to the radiating plate 24, which is the object of the present invention, will be described.
As can be seen from FIG. 3, the heat dissipation plate 24 includes a heat dissipation surface portion 24b along the upper surface of the inner lid 27, and an outer peripheral wall portion 24c rising from the vicinity of the outer periphery of the heat dissipation surface portion 24b to the lid 19 side. ing. The steam passage through hole 24a through which the steam passage 32 penetrates is configured to penetrate through the heat dissipation surface portion 24b, and the penetration shape is the first chamber 32a and the second chamber 32b that form the steam passage 32 described above. The member forming the is formed in a shape positioned on the inner diameter side.

As can be seen from the right side of FIG. 3B and the sectional view taken along line IIIb-IIIb shown in FIG. 4, the margin from the outer peripheral side end of the steam passage through hole 24a to the outer peripheral wall portion 24c of the heat dissipation plate 24 is extremely large. Limited.

The lid heater 25 according to the present invention has a heater length for obtaining a required heating amount, and is provided with a thermistor as a temperature sensor 25b and a temperature fuse 25c via a pair of connection terminals 25a. Furthermore, external connection terminals 25d are provided at both ends thereof.

As shown in FIG. 4, the lid heater 25 is configured to include a heater wire Hw that generates heat in an energized state and a heat transfer material portion Ha that is an aluminum foil that covers at least the heater wire Hw. The portion Ha includes a winding portion Ha1 that goes around the heater wire Hw and a projecting portion Ha2 that projects to one side of the heater wire Hw, and is attached to the outer peripheral wall portion 24c of the heat dissipation plate 24 via the projecting portion Ha2. ing. A part of the circulating portion Ha1 is in contact with the heat radiation surface portion 24b. In the present invention, this heating unit is referred to as "outer peripheral wall heating unit Z1". In this embodiment, the attachment uses a double-sided adhesive tape T.

On the other hand, as can be seen from FIG. 3, in the vicinity of the peripheral wall outside the outer peripheral wall heating section Z1, another side heating section Z2 opposite to the outer peripheral wall heating section Z1 is provided, and the connecting terminal 25a described above is provided. A thermistor serving as the temperature sensor 25b, a temperature fuse 25c, and the like are disposed therethrough.

Since the inner lid cover 66 is provided so as to cover the lower side of the lid heater 25 when the temperature is kept after the rice is cooked, the heat of the lid heater 25 is not directly applied to the cooked rice. Therefore, excessive release of water from cooked rice can be suppressed. Moreover, dew condensation water due to steam in the purging process or steam during heat retention may adhere to the upper surface of the inner lid cover 66 (between the inner lid 27). By adjusting, it is possible to prevent excessive condensation water. In the process of cooking rice, the proper amount of water can be adjusted to ensure the moisture of cooked rice.

[Another embodiment]
The heating cooker of the present invention is not limited to the configuration of the above embodiment, and various modifications can be made.

(1) As described above, since one object of the present invention is to secure the heater length, the heater wire Hw that generates heat in the energized state and at least the heater is provided on the inner peripheral side of the outer peripheral wall heating unit Z1. It may be configured to have the heat transfer material portion Ha that covers the wire Hw, and may be provided with another inner circumferential side heating portion Z3. This alternative embodiment is shown in FIG.

(2) In the above embodiment, the pressure regulating valves 43 and 43h are mounted, but it is also possible to provide only one pressure regulating valve. Of course, the configuration of the present invention is also effective as a non-pressure type rice cooker in which the pressure regulating valves 43 and 43h are not mounted. However, in the present invention, the vapor passage 32 provided under the lid body 19 and on the inner lid 27 is complicated, and liquid useful substances such as a bed and the like flowing into the vapor passage 32 can be separated together with the vapor s. The structure shall be adopted.

(3) In the above-described embodiment, the inner lid cover 66 is mounted, but the inner lid cover may not be mounted.

(4) In the above embodiment, an example in which the double-sided adhesive tape T is used to attach the heat transfer material portion Ha to the outer peripheral wall portion 24c has been described, but any means may be used for this attachment. ..

(5) Furthermore, although the rice cooker has been described as an example in the above-described embodiment, a heating cooker that heats and cooks a predetermined cooking product can be similarly applied, and the same operation and effect can be obtained. Obtainable.

10 Inner pot (cooking pot)
11 Rice cooker body (cooker body)
15 Induction heating coil (main body side heating means)
19 Lid 24 Radiating Plate 24a Steam Pass Through Hole 24b Radiating Surface Portion 24c Peripheral Wall Region 25 Lid Heater (Lid Side Heating Means)
27 Inner lid 32 Steam passage 32a First chamber 32a1 Low pressure side first chamber (first chamber)
32a2 High pressure side first chamber (first chamber)
32b 2nd chamber 43 Pressure regulating valve on low pressure side (pressure regulating valve)
43h Pressure regulator on high pressure side (pressure regulator)
46 Communication hole Hw Heater wire Ha Aluminum foil (heat transfer material part)
Ha1 Revolving part Ha2 Overhanging part Z1 Outer peripheral wall heating part Z2 Opposing side heating part Z3 Inner peripheral side heating part s Steam

Claims (2)

A cooker body in which a cooking pot with an upper opening is arranged,
A lid body configured to be able to open and close an upper end opening of the cooker body, and in a closed posture in which the upper end opening is closed, a steam passage that communicates the inside and the outside of the cooking pot,
It has a communication hole that constitutes the inlet of the steam passage, is provided on the side of the lid facing the inside of the cooking pot, and comprises an inner lid for sealing the upper end opening of the cooking pot,
A heat dissipation surface portion along the upper surface of the inner lid; an outer peripheral wall portion rising from the vicinity of the outer periphery of the heat dissipation surface portion to the lid side; and a heat dissipation plate having a steam passage through hole through which the steam passage penetrates. A radiator plate heating structure of a heating cooker having a lid side heating means on an upper surface of the radiator plate,
The heating portion of the lid side heating means is configured to include a heater wire that generates heat in an energized state, and a heat transfer material portion that covers at least the heater wire, and the heat transfer material portion circulates around the heater wire. and a projecting portion projecting on one side of the parts and the heater wire, in the configuration wherein the heater wire is that attached to the outer peripheral wall portion of the heat radiating plate via the projecting portion,
In the one outer peripheral wall heating part having the through hole for the steam passage on the inner peripheral side, the heater wire is located close to the heat dissipation surface part, and the projecting part is separated from the heat dissipation surface part. Between the wall portion and the steam passage through hole, the single heater wire is attached to the outer peripheral wall portion via the projecting portion,
An opposing heating unit is provided at a portion facing the one outer peripheral wall heating unit with the steam passage through-hole interposed therebetween.
A radiator plate heating structure comprising an inner peripheral side heating section on the inner peripheral side of the other outer peripheral wall heating section provided in the opposite side heating section, and a temperature sensor and a temperature fuse . The heat dissipation plate heating structure according to claim 1, wherein the inner circumferential side heating unit is configured to include a heater wire that generates heat when energized and a heat transfer material portion that covers the heater wire.

Images