JPH10146273A - Rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat retaining performance and to reduce power consumption by constituting an inner pot of an aluminum main body part, a stainless heat generating part and a resin layer provided at an outer periphery like covering them and providing a heat insulating layer consisting of an air layer between this resin layer and the heat generating part. SOLUTION: The inner pot 4 is provided with the aluminum main body part 4a, the stainless heat generating part 4b and the resin layer 4c provided at the outer periphery like covering them and the heat insulating layer consisting of the air layer 4d is provided between this resin layer 4c, the main body part 4a and the heat generating part 4b. The side face of the inner pot is heated by a main body auxiliary heater. At the time of using a heater, etc., the resin layer 4c of the outer peripheral part of the inner pot 4 and the air layer 4d become the heat insulating layer to make it difficult to give required heat to the inner pot 4 to a required degree. Then, the side face part is also heated by using such an induction heating coil as is arranged at the bottom surface part. The temperature of the pot 4 is detected by a temperature detector during cooking and energizing to each heater is controlled by a control part with the data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker which also serves as a jar, in which an object to be cooked is placed in an inner pot for heating cooking and keeping the temperature of the object to be cooked.

[0002]

2. Description of the Related Art In general, a configuration of a rice cooker serving as a jar, in which an object to be cooked is put in an inner pot to heat and heat the object to be cooked, as shown in FIG. 3, is known.

In FIG. 3, reference numeral 101 denotes a main body constituting the appearance of the rice cooker, 102 denotes a main body cover attached to the upper surface portion of the main body 101, 103 denotes an inner container having an open upper surface constituting the inner surface of the rice cooker, and 104 denotes an inner container. An inner pot removably housed in an opening of the inner container 103, a lid 105 configured to cover the inner pot 104, a temperature detection device 106 that contacts the bottom of the inner pot 104 to detect a temperature, 107 is an inner container 1
03 The inner pot 1 attached to the bottom when cooking rice and keeping warm
Induction heating coil for induction heating 04, 108 is lid 10
Reference numeral 109 denotes a lid auxiliary heating device attached to the inner container 5 for heating during rice cooking and heat retention, and 109 is a main body auxiliary heating device attached to the inner container 103 for heating during rice cooking and heat retention. As shown in FIG. 4, the inner pot 104 is composed of a stainless steel layer having a large amount of heat generated by induction heating on the outside and an aluminum layer having a good heat conductivity on the inside, and is fluorinated so that dirt and the like do not easily adhere to the inside. Is given.

When rice and water to be cooked are put in an inner pot 104, a lid 105 is closed, and a rice cooker switch of an operation unit (not shown) is pressed, so that an induction heating coil 107 and a lid auxiliary heating device are provided. 108. The inner pot 1
04 is heated and rice cooking starts. During cooking rice, inner pot 10
The temperature of No. 4 is detected by the temperature detecting device 106, and the control unit (not shown) controls the power supply to the induction heating coil 107, the lid auxiliary heating device 108, and the main body auxiliary heating device 109 based on the data. When the rice cooking is completed, a buzzer or the like notifies the end of the rice cooking and switches to the heat retention. Insulation is in inner pot
Is controlled to be constant (for example, to be T1 (temperature keeping control temperature)). In this heat retention control, for example, the temperature T of the inner pot 104 is detected by the temperature detection device 106, and when the detected temperature T becomes lower than T1, the induction heating coil 107 is used.
And a configuration in which power is supplied to the lid auxiliary heating device 108 and the main body auxiliary heating device 109, and when the detected temperature T becomes higher than T1, the power supply to the induction heating coil 107, the lid auxiliary heating device 108, and the main body auxiliary heating device 109 is stopped. And means.

[0005]

When the temperature is maintained for a long time by the above-mentioned temperature control, the state of cooked rice is changed by repeating cooling and reheating. Heating causes the water in the cooked rice to evaporate to become "Pasapasa", or the evaporated water to be dewed and dropped on the cooked rice to become "sticky". It becomes discolored, and when it gets worse, it gives off a bad smell. These changes become worse with each passing time. In order to suppress this change in the state of cooked rice, it is only necessary to make the inner pot (cooked rice) hard to cool as much as possible and to lengthen the cycle of cooling and reheating. Therefore, there is a configuration in which a heat insulating material such as glass wool is inserted between the main body and the inner container to make it difficult to cool the inner pot. However, since the inner pot is detachable, there is a gap with the inner container all around. For this reason, even if it is difficult to cool the inner pot by inserting heat insulating material such as glass wool between the main body and the inner container, heat escapes in the gap between the inner pot and the inner container and suppresses the change in the state of cooked rice during heat insulation Also had limitations. In addition, glass wool used as a heat insulating material has to be provided with a dust duct when handling it, and there is a problem that handling is difficult and cost increase is unavoidable.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises an inner pot having an aluminum main body, a stainless steel heating section, and a resin layer formed on the outer periphery so as to cover them. Is provided, and a heat insulating layer is provided between the resin layer and the heat generating portion. This allows
This is to suppress the temperature change of cooked rice in the inner pot.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an inner pot is composed of an aluminum main body and a stainless steel heating section, and a resin layer is provided via a heat insulating layer of an air layer so as to cover these. Things.

[0008] With this configuration, the temperature of the inner pot (= cooked rice) that is kept warm after the completion of rice cooking is more difficult to cool than that of the conventional configuration, so that the inner pot is cooled and reheated during the heat retention. Cycle is longer. Therefore, a change in the state of cooked rice during heat retention is suppressed by lengthening the cycle of cooling and reheating.

Further, even if the heat insulating material such as glass wool is inserted between the main body and the inner container to make the inner pot hard to cool as described above, the same effect can be obtained more easily.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a main body constituting an appearance of a rice cooker, 2 denotes a main body cover attached to an upper surface of the main body 1, 3 denotes an inner container having an open upper surface constituting an inner surface of the rice cooker, and 4 denotes a container. An inner pot detachably housed in the opening of the inner container 3, a lid 5 configured to cover the inner pot 4, a temperature detecting device 6 for detecting the temperature by contacting the bottom of the inner pot 4, Reference numeral 7 denotes an induction heating coil (hereinafter referred to as a main heating device) which is attached to the bottom of the inner container 3 for induction heating the inner pot at the time of cooking and keeping the temperature. The lid auxiliary heating device 9 is a main body auxiliary heating device which is attached to the inner container 3 and is composed of an induction coil for heating during rice cooking and during heat retention. As shown in FIG. 2, the inner pot 4 has a main body 4a made of aluminum and a heating section 4 made of stainless steel.
b, and a resin layer 4c is provided on the outer periphery to cover them, and an air layer 4c is provided between the resin layer 4c and the main body 4a and the heat generating portion 4b.
A heat insulating layer made of d is provided, and the inner surface of the inner pot is subjected to fluorine processing so that dirt and the like hardly adhere. Also,
As shown in FIG. 2, the resin layer 4c only
The reason why the air layer 4d is eliminated is that this portion is the contact surface of the temperature detecting device, and if the resin layer 4c and the air layer 4d are present in this portion, the temperature cannot be detected properly.

Rice and water to be cooked are put in the inner pot 4,
When the lid 5 is closed and the rice cooker switch of the operation unit (not shown) is pressed, the inner pot 4 is heated by the main heating device 7, the lid auxiliary heating device 8, and the main body auxiliary heating device 9, and rice cooking is started. The side wall of the inner pot is heated by the main body auxiliary heating device 9. However, if a heater or the like is used, the resin layer 4c and the air layer 4d on the outer periphery of the inner pot 4 become heat insulating layers, and it is difficult to heat the inner pot 4 necessary. Therefore, heating is performed using an induction heating coil which is also arranged on the side surface and the bottom surface. During rice cooking, the temperature of the inner pot 4 is detected by the temperature detecting device 6, and the control unit (not shown) controls energization to the main heating device 7, the lid auxiliary heating device 8, and the main body auxiliary heating device 9 based on the data. . When the rice cooking is completed, a buzzer or the like notifies the end of the rice cooking and switches to the heat retention as it is. The heat retention is controlled so that the temperature of the inner pot 4 becomes constant (for example, T1 (heat retention control temperature)). In this heat retention control, for example, T of the inner pot 4 is detected by the temperature detection device 6, and when the detected temperature T becomes lower than T1, the main heating device 7, the lid auxiliary heating device 8, and the main body auxiliary heating device 9 are energized to perform detection. When the temperature T becomes higher than T1, the power supply to the main heating device 7, the lid auxiliary heating device 8, and the main body auxiliary heating device 9 is stopped.

While the above-described heat-retaining control is performed during the heat-retaining operation, since the outer periphery of the inner pot 4 has the resin layer 4c and the air layer 4d, the temperature of the inner pot is hardly lowered (insulation effect). The cycle of cooling / reheating of the cooked rice inside is longer than before.

Further, according to the configuration of the inner pot of the rice cooker according to the present invention, since the outer periphery of the inner pot is made of resin, the inner pot is used when a handle portion is formed or when rice is put into a bowl. It is possible to easily configure a positioning portion for preventing the rotation of the device from carelessly.

[0015]

According to the above construction, the temperature of the inner pot during the heat retention is hard to decrease, and the number of times of cooling and reheating of the rice during the heat retention is reduced, so that the change of the rice condition can be suppressed. In addition to the improvement of the heat retention performance, there is an effect that the number of times of heating during the heat retention is reduced, so that the power consumption is also reduced.

[Brief description of the drawings]

FIG. 1 is a structural sectional view of a rice cooker showing one embodiment of the present invention.

FIG. 2 is a sectional view of an inner pot of the rice cooker.

FIG. 3 is a structural sectional view of a rice cooker showing a conventional example.

FIG. 4 is a sectional view of an inner pot of the rice cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 3 Inner container 4 Inner pot 4a Main body part 4b Heating part 4c Resin layer 4d Air layer 5 Lid 6 Temperature detecting device 7 Induction heating coil (main heating device) 8 Lid auxiliary heating device 9 Main body auxiliary heating device

Claims (1)

[Claims] 1. A body constituting an appearance of a rice cooker, an inner container having an open upper surface constituting an inner surface of the rice cooker, an inner pot detachably housed in an opening of the upper surface of the inner part of the rice cooker, and the inner pot A lid configured to cover the inner pot, a temperature detecting device for detecting the temperature of the inner pot by contacting the inner pot, and an induction attached to the bottom of the inner container for induction heating of the inner pot at the time of cooking rice and keeping the temperature warm. In a rice cooker having a heating coil and a lid auxiliary heating device attached to the lid and heating during rice cooking and heat keeping, the inner pot (4) is made of an aluminum body (4).
a), a heat-generating section (4b) made of stainless steel, and a resin layer (4c) on the outer periphery so as to cover them.
c) a rice cooker characterized in that a heat insulating layer composed of an air layer (4d) is provided between the main body part (4a) and the heat generating part (4b).