JP4135560B2 - Cooked rice incubator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rice cooker.
[0002]
[Prior art]
The configuration and operation of a conventional rice cooker (jar rice cooker) will be described with reference to FIG.
[0003]
In FIG. 8, reference numeral 1 denotes an inner pot that heats and cooks a predetermined amount of rice and water. At the bottom of the inner frame 3 of the main body 2, temperature detecting means 4 for detecting the temperature of the inner hook 1 is provided so as to be in contact with the bottom of the inner hook 1. Further, at the bottom of the inner frame 3, there is an electromagnetic induction heating means 5 for heating the cooked rice in the inner pot 1, and 6 is a control means for controlling the heating means 5. The control means 6 also has a high frequency power supply for supplying power to the heating means 5. There is also a heat-retaining heating means 7 at the top of the inner frame 3, and a lid 8 that can be opened and closed at the top of the main body 2. On the inner surface of the lid 8, a radiator plate 9, a lid heating means 10, and a lid temperature detection means 11 for detecting the temperature of the inner pot 1 are provided. An operation panel 12 is provided on the upper portion of the main body 2.
[0004]
The temperature of the cooked rice is detected by the temperature detecting means 4 in contact with the bottom of the inner pot 1 by the cooked rice warmer having the above-described configuration, and the control means 6 sets a preset warmed temperature, for example, based on this detected value. Electric power is supplied to the heating means 5 so as to be 72 ° C., and the stainless steel layer of the clad material inner pot 1 made of stainless steel and aluminum is heated by electromagnetic induction. Moreover, when the control means 6 electronically controls the input of the heat retaining heating means 7 and the lid heating means 10, a heating amount corresponding to the amount of cooked rice can be given, and the cooked rice temperature can be kept at the set warming temperature of 72 ° C.
[0005]
In general, when the temperature of the cooked rice increases, the lipids, proteins and carbohydrates in the cooked rice undergo an oxidation reaction with oxygen in the air, or these substances undergo a decomposition or polymerization reaction. Generation of warm odor and deterioration of taste properties occur. Moreover, when the heat retention temperature is lowered, spoilage of cooked rice by bacteria occurs. In order to solve these problems, various techniques have been developed so far.
[0006]
Conventionally, this type of cooked rice warmer is provided with a gas separation membrane for exhausting oxygen in the inner pot 1 (see, for example, Patent Document 1). FIG. 9 shows a conventional cooked rice warmer described in Patent Document 1. As shown in FIG.
[0007]
In FIG. 9, 13 is a decompression device for decompressing the air in the inner pot 1, and 14 is a gas separation membrane that allows only oxygen in the air to pass through. The absolute amount of oxygen is reduced while the pressure is reduced using the gas separation membrane 14 that allows only oxygen to pass through, and only the oxygen in the inner pot 1 is discharged to lower the oxygen concentration. As a result, yellowing of the cooked rice and the generation of a warm odor were prevented.
[0008]
However, in the conventional configuration, since the air in the inner pot 1 is discharged by the decompression device 13, a high degree of hermeticity in the inner pot 1 is required, and the configuration becomes a kind of pressure vessel, It has been extremely difficult to maintain high airtightness for a long time, and since it is a kind of pressure vessel, it has a problem that it is difficult to configure for general household use.
[0009]
In addition, when the temperature is kept for several hours, the sealing performance is lost, air flows in, the oxygen concentration in the inner pot 1 increases, and the cooked rice is deteriorated due to the temperature keeping. In addition, a large amount of water is present in the inner pot 1 after cooking, and the inner pot 1 is saturated water vapor. When this air is discharged, the large amount of water is reduced by the decompression device 13 or the gas separation membrane 14. There is a problem that the capacity of the gas separation membrane 14 and the like is reduced, and water accumulated in the gas separation membrane 14 is spoiled.
[0010]
[Patent Document 1]
Japanese Patent Laid-Open No. 5-1554039 (FIG. 1)
[0011]
[Problems to be solved by the invention]
In view of the above-mentioned problems of the conventional technology, the problem to be solved by the present invention is to exhaust the oxygen in the inner pot to suppress the yellowing of the cooked rice and the deterioration of the physical properties of the cooked rice. The goal is to provide a delicious cooked rice warmer.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, a cooked rice warmer of the present invention supports a solid electrolyte having oxygen ion conductivity, a pair of electrodes formed on both sides of the solid electrolyte so as to face each other, and the solid electrolyte. A gasket, a pair of separators for sandwiching the gasket, an oxygen pump having at least one oxygen pump cell having a pair of current collector plates for sandwiching the pair of separators, an inner pot for containing cooked rice, Based on the detection value of the temperature detection means, the lid that is mounted on the upper side of the pot, the heating means for heating the cooked rice in the inner pot, the temperature detection means for detecting the temperature of the inner pot Control means for controlling the cooked rice to a predetermined temperature using the heating means, a gas exhaust pipe for releasing oxygen in the inner pot to the atmosphere using the oxygen pump, and between the oxygen pump and the gas exhaust pipe A sealing valve provided, those having a heater for heating the solid electrolyte of the oxygen pump.
[0013]
Accordingly, since the oxygen pump exhausts oxygen in the inner pot, yellowing of the cooked rice and deterioration of the taste properties can be suppressed, and delicious cooked rice can be provided even if the temperature is kept.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Since the object of the present invention described above can be achieved by using the configuration described in each claim as an embodiment, the effects of the configuration will be described together with the configuration of each claim. The specific terms that require explanation in the configuration will be described in detail in the embodiment of the present invention by adding a detailed explanation.
[0015]
According to the first aspect of the present invention, there is provided a solid electrolyte having oxygen ion conductivity, a pair of electrodes formed on both sides of the solid electrolyte so as to face each other, a gasket for supporting the solid electrolyte, and sandwiching the gasket A pair of separators, an oxygen pump having at least one oxygen pump cell having a pair of current collector plates sandwiching the pair of separators, an inner pot for containing cooked rice, and an upper portion of the inner pot. A lid that can be opened and closed, a heating means for heating the cooked rice in the inner pot, a temperature detection means for detecting the temperature of the inner pot, and the heating means based on the detected value of the temperature detection means. Control means for controlling the cooked rice to a predetermined temperature, a gas exhaust pipe for releasing oxygen in the inner pot to the atmosphere using the oxygen pump, and a sealing valve provided between the oxygen pump and the gas exhaust pipe ; ,in front Those having a heater for heating the solid electrolyte oxygen pump.
[0016]
According to this embodiment, since the oxygen pump exhausts oxygen in the inner pot, yellowing of the cooked rice and deterioration of the taste properties can be suppressed, and delicious cooked rice can be provided even if the temperature is kept. In addition, the oxygen pumping action of the solid electrolyte efficiently removes only the oxygen contained in the outside air and reduces the oxygen concentration in the inner pot, so that the activity of bacteria can be suppressed and the decay of cooked rice can be delayed. Can do.
[0017]
In addition, since oxygen pump cells can be stacked (stacked), even if the electrode area is small, an oxygen pump having a small size and excellent exhaust performance can be obtained by increasing the number of electrodes.
[0018]
In addition, by providing a sealing valve that can block the inflow of gas etc. in the gas exhaust pipe that releases oxygen to the atmosphere, it is possible to prevent steam and rice balls from cooking rice from flowing into the oxygen pump, Since there is no accumulation of moisture due to condensation, the cooked rice warmer can always be kept hygienic. Further, since the back flow of the gas having a high oxygen concentration is prevented, the oxygen concentration in the inner pot can be efficiently kept low all the time, and there is no need for a special pressure vessel structure, which can be simplified.
[0019]
Furthermore , even if the number of oxygen pump cells is small and the amount of self-heating is small, auxiliary heating is performed by the heater, so that stable exhaust performance can be ensured regardless of the size of the oxygen pump and the number of cells.
[0020]
According to a second aspect of the present invention, there is provided a solid electrolyte having oxygen ion conductivity, a pair of electrodes formed on both sides of the solid electrolyte so as to face each other, a gasket for supporting the solid electrolyte, and sandwiching the gasket A pair of separators, an oxygen pump having at least one oxygen pump cell having a pair of current collector plates sandwiching the pair of separators, an inner pot for containing cooked rice, and an upper portion of the inner pot. A lid that can be opened and closed, a heating means for heating the cooked rice in the inner pot, a temperature detection means for detecting the temperature of the inner pot, and using the heating means based on the detection value of the temperature detection means Control means for controlling the cooked rice to a predetermined temperature, a gas exhaust pipe for releasing oxygen in the inner pot to the atmosphere using the oxygen pump, and a sealing valve provided between the oxygen pump and the gas exhaust pipe The For example, by heating the rice by using a self-heating of the oxygen pump, even working to labor saving of the heating means for heating the pot inner provided in the rice warmer, it is possible to kept the rice, Power saving can be achieved.
[0021]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0022]
(Example 1)
FIG. 1 is a cross-sectional configuration diagram of a main part of a cooked rice warmer in Embodiment 1 of the present invention. In FIG. 1, 1 is an inner pot provided in the main body 2 of the cooked rice warmer, and heat cooking is performed by adding a predetermined amount of rice and water. In the main body 2 facing the outer bottom of the inner hook 1, an inner hook temperature detecting means 4 for detecting the temperature of the inner hook 1 is provided so as to be in contact with the inner hook 1. A heating means 5 comprising a heating coil is provided. Reference numeral 6 denotes a control unit mainly composed of a microcomputer, which is also provided with a high frequency power source for supplying power to the heating unit 5. Further, the upper part of the inner pot 1 has a heat-retaining heating means 7 (heat-retaining heater), and the radiator plate 9 at the lower part of the lid 8 has a lid heating means 10 (lid heater) and a lid for detecting the temperature of the inner pot 1. A temperature detecting means 11 is provided.
[0023]
Further, the oxygen pump 15 shown in FIG. 4 and FIG. 5 formed as a stack by stacking a plurality of oxygen pump cells shown in FIG. 2 is arranged along the outer surface portion or the outer bottom portion of the inner pot 1 to draw oxygen from the inner pot 1. A gas exhaust pipe 16 for introducing a gas to be contained and exhausting from an exhaust port 16a opened in the main body 2 was connected. The gas exhaust pipe 16 is provided with a sealing valve 17 between the oxygen pump 15 and the inner pot 1 so that a gas containing high-concentration oxygen does not flow back from the oxygen pump 15 into the inner pot 1. 15 and the inner pot 1 can be separated.
[0024]
Therefore, since the oxygen pump 15 does not adhere to the oxygen pump 15 or the like, water vapor generated by rice cooking does not adhere to the oxygen pump 15 or the like, so that stable oxygen exhaust capacity can be maintained for a long period of time. Since it does not accumulate, it is difficult for spoilage to occur, and the cooked rice warmer can be maintained hygienically for a long time.
[0025]
In this jar rice cooker, the temperature of the cooked rice is detected by the temperature detection means 4 in contact with the bottom of the inner pot 1. This detected information is sent to the control means 6, and the heating means 5 is supplied with electric power to generate a magnetic force so that the temperature of the cooked rice becomes 72 ° C., which is the set heat retention temperature, and is composed of a clad material made of stainless steel and aluminum. The stainless steel layer of the inner pot 1 is heated by electromagnetic induction to keep the cooked rice warm. Moreover, when the control means 6 electronically controls the input of the heat retaining heating means 7 and the lid heating means 10, a heating amount corresponding to the amount of cooked rice can be given, and the cooked rice temperature can be kept at the set warming temperature of 72 ° C.
[0026]
Next, a method for manufacturing the oxygen pump cell constituting the oxygen pump 15 will be briefly described. FIG. 2 and FIG. 3 show a main part assembly explanatory diagram and a main part sectional view of the oxygen pump. 2 and 3, reference numeral 18 denotes a plate-like oxygen ion conductive solid electrolyte, and a pair of electrodes 191 and 192 are formed opposite to each other.
[0027]
A substrate made of lanthanum gallium oxide was used as the solid electrolyte 18, and a paste made of perovskite oxide was printed on both sides as a pair of electrodes 191 and 192, dried, and then fired in an electric furnace. For the solid electrolyte 18, other stabilized zirconia, stabilized ceria, etc. having oxygen ion conductivity can also be used. In order to improve the oxygen ion conductivity of the lanthanum gallium oxide used in the examples, the lanthanum site is used. In addition, a dissimilar metal such as a transition metal or an alkaline earth metal may be substituted for a part of the gallium site. Further, a glass paste was printed on the outer periphery of the solid electrolyte 18, and the solid electrolyte 18 was adhered around the central opening 20 a in the gasket 20.
[0028]
Next, the separator 211 and the current collector plate 221 are disposed on one electrode 191 side so that the gasket 20 is sandwiched, and the separator 212 and the current collector plate 222 are disposed on the other electrode 192 side with a good sealing property. And laminated together. As a result, an equal force was applied to the plurality of protrusions 221a and 222a formed on the current collector plates 221 and 222 so that the solid electrolyte 18 was not cracked. Further, the shape of the protrusions 221a and 222a formed on the current collector plates 221 and 222 is a plurality of hemispherical dimples, and the electrodes 191 and 192 are in contact with each other at points to be electrically connected to each other. The solid electrolyte 18 was fixed at the apex of each other.
[0029]
In addition, the pair of separators 211 and 212 includes gas introduction portions 221b and 221c serving as holes and gas serving as holes corresponding thereto so as to hermetically separate the spaces 191a and 192a formed on the pair of electrodes 191 and 192, respectively. Discharge portions 222b, 222c and the like were provided, and the gas was not mixed while the holes were aligned and the gases 191 and 192 were in contact with each other. In the figure, 211a and 211b are gas introduction grooves, and 212a and 212b are gas discharge grooves communicating with the gas discharge portions 222b and 222c, respectively. 3 indicate that the gas introduced from the gas introduction portions 221b and 221c communicated with the gas exhaust pipe 16 into the inner pot 1 through the solid electrolyte 1 from the gas discharge portions 222b and 222c toward the exhaust port 16a of the main body 2. The route for exhausting only oxygen is shown.
[0030]
Further, when a plurality of oxygen pump cells shown in FIG. 3 are stacked as shown in FIG. 4, it is necessary to insulate with an insulating plate 24 interposed therebetween, but current collecting plates having the same polarity as shown in FIG. By laminating and laminating, the insulating plate 24 becomes unnecessary, so that the size of the entire oxygen pump can be reduced. FIG. 6 shows the voltage-current characteristics of the oxygen pump cell having the above configuration.
[0031]
In the above embodiment, the air contained in the inner pot 1 reaches the electrode 191 serving as one cathode, and oxygen contained in the air is adsorbed onto the electrode 191 serving as the cathode. When a voltage is applied between the pair of electrodes 191 and 192 by the voltage supply device, the adsorbed oxygen receives electrons, and a three-phase interface formed between the cathode 191, the solid electrolyte 18, and the gas phase. It is further taken into the solid electrolyte 18 and becomes oxygen ions and moves through the solid electrolyte 18.
[0032]
The oxygen ions that have reached the electrode 192 that is the other anode emit electrons at the three-phase interface formed between the electrode 192 that is the anode, the solid electrolyte 18, and the gas phase, and become oxygen again and discharged to the atmosphere. As a result, the inner pot 1 has a low oxygen concentration, and the lipid, protein and carbohydrate in the cooked rice are prevented from oxidizing with oxygen in the air, and these substances are prevented from being decomposed or polymerized. The occurrence of yellowing and warming odor can be reduced. Moreover, the activity of bacteria can be suppressed and the decay of cooked rice can be delayed.
[0033]
The jar rice cooker comprised as mentioned above was investigated about the heat retention state of cooked rice. First, rice and water, which are raw materials for cooked rice, were put into the inner pot 1 and cooked. The oxygen concentration of the gas in the inner pot 1 immediately after cooking was almost 0%, but the inside was cooled and the saturated vapor pressure was lowered, and air flowed in from the outside, and the oxygen concentration gradually increased. Therefore, the control means 6 operated the sealing valve 17 and the oxygen pump 15 that had isolated the inner pot 1 to exhaust the oxygen in the inner pot 1 by pumping.
[0034]
At this time, power of 10 to 20 W is supplied to the oxygen pump 15 using a heater so that the operating temperature of the oxygen pump 15 including the solid electrolyte 18 and the pair of electrodes 191 and 192 becomes 600 to 700 ° C. Heated to. The oxygen exhaust amount of the oxygen pump 15 can be changed by controlling the voltage. When a current flows through the oxygen pump 15, the temperature of the oxygen pump 15 itself increases due to the self-heating action. In particular, when an oxygen pump in which a plurality of oxygen pump cells are stacked is used, heat generation becomes large. In this case, by disposing the oxygen pump 15 in the main body 2 at the outer portion or the outer bottom portion of the inner pot 1, Can be efficiently used for heat insulation of cooked rice, the heat-retaining heating means 7 can be stopped or the capacity can be reduced, and power saving can be achieved.
[0035]
FIG. 7 is a view showing the relationship between the heat retention time when oxygen in the inner pot 1 is exhausted by the oxygen pump 15 and the oxygen concentration in the inner pot 1. Oxygen pumped out by the oxygen pump 15 was discharged to the outside at 10 to 30 cc per minute, and the oxygen concentration in the inner pot 1 became 2 to 4% in 20 to 60 minutes. After a while, the oxygen concentration in the inner pot 1 increased due to the inflow of external air because it was not a pressure vessel. By operating the oxygen pump again at a low concentration stage, the oxygen concentration in the inner pot 1 was quickly increased. It was possible to reduce. Further, at this time, it was found that the inside of the inner pot 1 is almost at atmospheric pressure, and the airtight structure is simple.
[0036]
Immediately after cooking, sensory evaluation was performed when the oxygen concentration in the inner pot 1 was maintained at 2 to 4%. When the inner pot was kept in the atmosphere as in the past, the rice was slightly oxidized, and the evaluation of the warming odor and taste was low, whereas when it was held at a low oxygen concentration, the warming odor There was little, and the taste was good. Furthermore, when the sensory evaluation of the cooked rice that had been kept warm for 12 hours and 24 hours in this state, both had a little warming odor, had a freshly cooked odor, little yellowing, sticky taste evaluation, and elasticity The overall evaluation was high. On the other hand, the cooked rice that had been kept warm for 12 hours and 24 hours in the atmosphere as in the past had a strong warming odor, yellowing occurred, the taste was poor, and the overall evaluation was low.
[0037]
Next, the heat insulation state of the cooked rice when the lid 8 was opened and closed was examined. While the lid 8 is closed, the oxygen pump 15 exhausts oxygen in the inner pot 1, and immediately after the lid 8 is opened, the oxygen concentration in the inner pot 1 becomes equal to the oxygen concentration in the atmosphere. It was 8%. When the lid 8 was closed, the open / close detection means detected that the lid 8 was closed, and the sealing valve 17 and the oxygen pump 15 were operated. The oxygen in the inner pot 1 was released to the outside through the gas exhaust pipe 16, and the oxygen concentration in the inner pot 1 became 2 to 4% in 20 to 60 minutes.
[0038]
The sensory evaluation of the cooked rice when the lid 8 was opened and closed also showed comprehensively good results such as a warm odor, yellowing of cooked rice, and physical properties of the taste. It was also found that delicious cooked rice with little warming odor can be provided by changing the amount of oxygen exhausted according to the amount of cooked rice.
[0039]
As described above, in the present invention, the flat solid electrolyte 18 having oxygen ion conductivity, the pair of electrodes 191 and 192 formed on both sides of the solid electrolyte 18 so as to face each other, and the solid electrolyte 18 are supported. The oxygen pump 15 includes at least one oxygen pump cell having at least one oxygen pump cell having a gasket 20, a pair of separators 211 and 212, and a pair of current collector plates 221 and 222. As a result, the yellowing of the cooked rice and the deterioration of the physical properties of the taste can be suppressed, and delicious cooked rice can be provided even if the temperature is kept warm.
[0040]
Furthermore, the oxygen pumping action of the solid electrolyte 18 efficiently removes only the oxygen contained in the external air and reduces the oxygen concentration in the inner pot 1, thereby suppressing the activity of bacteria and delaying the decay of cooked rice. Can be made.
[0041]
Further, since the oxygen pump cells can be stacked (stacked), the oxygen pump 15 having a small size and excellent exhaust performance can be obtained by overlapping the number of electrodes even if the electrode area is small.
[0042]
Further, since the gas exhaust pipe 16 that releases oxygen to the atmosphere is provided with a sealing valve 17 that can block the inflow of gas or the like, it prevents the steam or rice balls from cooking from flowing into the oxygen pump 15. This prevents water from being accumulated due to condensation and keeps the cooked rice incubator hygienic. Moreover, since the back flow of the gas with a high oxygen concentration is prevented, the oxygen concentration in the inner pot 1 can be efficiently kept low all the time.
[0043]
Further, in the present invention, since the solid electrolyte 18 and the gasket 20 are bonded with glass, they can be integrated with good sealing performance even at high temperatures, and oxygen can be efficiently exhausted.
[0044]
In addition, since the gasket 20, the pair of separators 211 and 212, and the pair of current collector plates 221 and 222 are sealed with glass or metal 23, the gas contacting the pair of electrodes 191 and 192 can be separated in an airtight manner. The exhaust capacity of the oxygen pump 15 can be improved.
[0045]
In the present invention, the pair of separators 211 and 212 separate the spaces formed on the pair of electrodes 191 and 192 so that the gases are mixed while the electrodes 191 and 192 are in contact with each other. The exhaust capability of the oxygen pump 15 can be improved.
[0046]
Further, according to the present invention, the pair of current collector plates 221 and 222 has a plurality of protrusions 221a and 222a, and is electrically connected to and electrically connected to the pair of electrodes 191 and 192. , 192 can be conducted. In addition, since the oxygen pump cell can be stacked in layers while securing electrical continuity and an exhaust path through the current collecting plates 221, 222, the exhaust capacity of the oxygen pump 15 can be improved. .
[0047]
In addition, the present invention eliminates the need for attaching a lead wire to the electrodes 191 and 192 with a conductive paste by applying a voltage to the pair of current collector plates 221 and 222, thereby simplifying the manufacturing process. Since there is an effect of uniformly dispersing the heat of the oxygen pump during operation, it is possible to prevent damage such as cracking of the solid electrolyte 18 due to thermal stress.
[0048]
In addition, the present invention eliminates the need for the insulating plate 24 when stacking the current collecting plates having different polarities by stacking the current collecting plates having the same polarity of the plurality of oxygen pump cells. The overall size of the pump 15 can be reduced.
[0049]
In addition, since the present invention includes a heater for heating the solid electrolyte 18, even if the number of oxygen pump cells is small and the amount of self-heating is small, auxiliary heating is performed by the heater, and thus depends on the size of the oxygen pump 15 and the number of cells. Without this, stable exhaust performance can be ensured.
[0050]
In addition, the present invention uses the self-heating of the oxygen pump 15 to heat the cooked rice without using the heating means 5 for heating the inner pot 1 provided in the cooked rice warmer or reducing the capacity. However, since the cooked rice can be kept warm, power saving can be achieved.
[0051]
Further, according to the present invention, the oxygen pump 15 is arranged on the side surface or bottom of the inner pot 1 so that the surface of the cooked rice at the upper part in the inner pot 1 is not dried by the heat of the oxygen pump, so that there is no unevenness in heat retention. Can provide cooked rice.
[0052]
【The invention's effect】
As described above, according to the present invention, since the oxygen pump exhausts oxygen in the inner pot, it is possible to suppress yellowing of rice and deterioration of physical properties of the cooked rice, and provide delicious cooked rice even when kept warm. Can do.
[Brief description of the drawings]
FIG. 1 is a cross-sectional configuration diagram of a main part of a rice cooker according to a first embodiment of the present invention. FIG. 2 is a schematic assembly configuration diagram of an oxygen pump cell according to the first embodiment. Cross-sectional configuration diagram [FIG. 4] Cross-sectional configuration diagram of the main part when the oxygen pump cell is stacked in Example 1 [FIG. 5] Cross-sectional configuration diagram of the main part when another oxygen pump cell is stacked in Example 1 [FIG. FIG. 7 is a diagram of the voltage-current characteristics of the oxygen pump cell in Example 1. FIG. 7 is an exhaust characteristic diagram of the oxygen pump cell in Example 1. FIG. 8 is a cross-sectional view of the main part of a conventional rice cooker. Cross-sectional configuration diagram of the main part of a warmer [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inner pot 4 Temperature detection means 5 Heating means 6 Control means 8 Lid 15 Oxygen pump 16 Gas exhaust pipe 17 Sealing valve 18 Solid electrolyte 191 and 192 A pair of electrodes 20 Gaskets 211 and 212 A pair of separators 221 and 222 A pair of current collectors Plate 221a, 222a Protrusion 23 Glass or metal

Claims (2)

A solid electrolyte having oxygen ion conductivity; a pair of electrodes formed on opposite sides of the solid electrolyte; a gasket supporting the solid electrolyte; a pair of separators sandwiching the gasket; and the pair of pairs An oxygen pump having at least one oxygen pump cell having a pair of current collector plates sandwiching the separator; an inner pot for containing cooked rice; an openable / closable lid mounted above the inner pot; Heating means for heating the cooked rice in the pot, temperature detecting means for detecting the temperature of the inner pot, and control for controlling the cooked rice to a predetermined temperature using the heating means based on the detection value of the temperature detecting means It means a gas exhaust pipe to release to the atmosphere of oxygen in the kiln using the oxygen pump, a sealing valve provided between the gas exhaust pipe and the oxygen pump, the solid conductive of the oxygen pump Cooked rice warmer having a heater for heating quality. A solid electrolyte having oxygen ion conductivity; a pair of electrodes formed on opposite sides of the solid electrolyte; a gasket supporting the solid electrolyte; a pair of separators sandwiching the gasket; and the pair of pairs An oxygen pump having at least one oxygen pump cell having a pair of current collector plates sandwiching the separator; an inner pot for containing cooked rice; an openable / closable lid mounted above the inner pot; Heating means for heating the cooked rice in the pot, temperature detecting means for detecting the temperature of the inner pot, and control for controlling the cooked rice to a predetermined temperature using the heating means based on the detection value of the temperature detecting means and means, and a gas exhaust pipe to release to the atmosphere of oxygen in the kiln using the oxygen pump, a sealing valve provided between the gas exhaust pipe and the oxygen pump, the self of the oxygen pump Cooked rice warmer for heating the rice by using heat.

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