JP3713840B2 - Induction heating rice cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an induction heating rice cooker using electromagnetic induction.
[0002]
[Prior art]
Hereinafter, a conventional induction heating rice cooker will be described. In FIG. 19, 1 is the main body of the rice cooker, 2 is the inner pot for containing rice and water, 3 is the main body heating coil arranged on the bottom surface of the inner pot 2 and heats the inner pot 2 by induction heating, 4 is the magnetic flux of the heating coil 3 5 is an inverter that excites the main body heating coil 3, 6 is a fin that diffuses heat generated by the elements of the inverter, 7 is a fan that cools, 8 is an operation unit that selects rice cooking or heat retention, and 9 is rice cooking This is the overall control circuit of the device.
[0003]
The conventional induction heating rice cooker configured as described above will be described below. Each operation process is selected by the operation unit 8 and a high-frequency current is supplied from the inverter 5 to the main body heating coil 3 in accordance with the process. The elements of the inverter 5 are cooled by the fins 6 and the fans 7. Here, a magnetic field is generated in the heating coil 3 by a high-frequency current, an exciting current flows in the inner pot 2 itself by this magnetic field, and the inner pot 2 becomes a heating element by Joule heat, and rice cooking and heat insulation can be performed.
[0004]
[Problems to be solved by the invention]
However, the induction heating rice cooker having a conventional configuration has a configuration in which outside air is taken in, cooled, and exhausted by a fan, and the operation noise of the fan is large. For example, when the surroundings are quiet, such as early morning or late at night, the wind noise of the fans can be heard, resulting in sleep disturbance. Moreover, since this structure requires an intake port and an exhaust port, foreign matter may enter from here and cause a failure.
[0005]
The present invention is intended to solve such a conventional problem, and suppresses the temperature rise of the element by storing the heat generated by the semiconductor switching element and the rectifying element, which are heat-generating components, and gradually radiating the heat. It aims at providing the induction heating rice cooker which can cook rice without using a fan.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, an induction heating cooker according to the present invention is provided at the lower portion of an inner pan, and converts an electric power from a commercial power source to a high frequency by a semiconductor switching element, and a high frequency current is caused to flow by the inverter by an induction magnetic field. A heating coil that generates Joule heat in the pan, a heat storage unit that stores heat generated by the switching elements and the rectifying elements of the inverter, and a temperature detection unit that measures the temperature of the heat storage unit, and temperature information of the temperature detection unit after cooking rice It is characterized by a configuration in which the key for starting rice cooking is not accepted until it is estimated that the temperature reached during the next rice cooking is below the rating of the element.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to any one of claims 1 to 6 includes an inverter that converts commercial power into high frequency by a semiconductor switching element, a first heating coil that is excited by the inverter, and a switching element of the inverter. A heat storage unit that stores heat generated by the rectifying element and gradually dissipates heat, a temperature detection unit that measures the temperature of the heat storage unit, a control unit that controls rice cooking operation, and a rice cooking start key for operating rice cooking start, control means, the temperature of the heat storage unit detected by said temperature detecting means, the the temperature information of the heat storage unit can the current temperature of the element is estimated from the temperature information of the heat storage portion after cooking completion, yet the cooking If the temperature of the element that will be reached during the next cooking is predicted and the temperature of the element can be estimated to exceed the rating during cooking, the temperature reached during the next cooking will be The induction heating rice cooker that does not accept the rice cooking start key until it is estimated to be below, or the control means detects the temperature of the heat storage unit by the temperature detection unit, and the current element by the temperature information of the heat storage unit The temperature of the heat storage section after the end of cooking rice, from the temperature information of the heat storage unit after predicting the temperature of the element reached during the process when the next cooking of the rice is performed, and after accepting the rice cooking start key, When it can be estimated that the temperature of the element exceeds the rating during rice cooking, the induction heating rice cooker is configured to wait for the start of the rice cooking operation until the temperature reached during the next rice cooking is estimated to be lower than the rating of the element.
[0008]
Furthermore, the invention described in claim 1 or 2 is provided with a pan sensor that is in contact with the pan and outputs information on the presence or absence of the pan and the temperature of the pan, and is turned on for a certain period of time during cooking, and the amount of rice cooked is determined by the temperature rise. The rice cooking process is stopped when the temperature of the element can be estimated to exceed the rating during rice cooking with the amount of rice cooking, and the rice cooking process is performed again when the temperature falls below a predetermined temperature. Or it is set as the induction heating rice cooker of 2.
[0009]
Furthermore, the invention described in claim 3 or 4 further includes a weight sensor for detecting the amount of rice cooked, and the temperature reached during cooking with respect to the amount of rice cooked next time based on the temperature information of the temperature detecting means after rice cooking is an element. It is set as the induction heating rice cooker characterized by the structure which does not accept the rice cooking start key until it becomes below the rating.
[0010]
Furthermore, the invention according to claim 5 or 6 further includes means for detecting temperature information of the outside air, and does not accept the rice cooking start key until the temperature reached during cooking is equal to or lower than the rating of the element according to the temperature of the outside air. The induction heating rice cooker is characterized by its configuration .
[0011]
【Example】
(Example 1)
A first embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 10 is a rice cooker body, 11 is an inner pot for adding rice and water, 12 is a body heating coil, 13 is ferrite, 14 is an inverter, 15 is a heat storage unit, 16 is a control circuit, and 17 is a temperature of the heat storage unit. A temperature sensor such as a thermistor for detecting, and an operation unit 18 for selecting operation. FIG. 2 is a circuit diagram of this. 19 is a switching element that performs switching at high frequency, 20 is a resonance capacitor, 21 is a smoothing capacitor, 22 is a choke coil, 23 is a rectifier, 24 is a driver section, 25 is a power supply circuit, and 26 is a temperature sensor.
[0012]
The operation of this embodiment will be described below.
[0013]
In FIG. 1, the operation content of the operation unit 18 is input to the control circuit 16, and the inverter 14 is operated in accordance with the rice cooking process and the heat retaining process by the output from the control circuit 16. A high-frequency current is passed from the inverter 14 to the main body heating coil 12 to generate a magnetic field in the main body heating coil 12. By this magnetic field, an exciting current flows in the inner pot 11 itself, and the inner pot 11 itself becomes a heating element by Joule heat so that it can be heated so as to be wrapped from the whole pan, and rice cooking or the like can be performed.
[0014]
The operation of this circuit will be described with reference to FIG. Information from the operation unit 18 is input to the control circuit 16, and contents for controlling the inverter 14 are input to the driver unit 24. Therefore, the driver unit 24 outputs information for switching the switching element 19 at high speed. With this output, a high-frequency current flows through the heating coil 12 from the DC voltage that has passed through the rectifying element 23 and the smoothing capacitor 21, and a magnetic field is generated.
[0015]
Heat generated by the switching element 19 and the rectifying element 19 of the inverter is stored in the heat storage unit 15 of FIG. This heat storage part 15 consists of an aluminum fin and a heat storage material. Heat is quickly diffused from the element package using aluminum fins, and the heat is stored in a heat storage material such as a resin having a high heat capacity which is in contact with the fins and enclosed. Here, the temperature of the heat storage material is detected by the temperature sensor 17, and the current temperature of the element can be estimated from this information. Therefore, when the next cooking is further performed from the state of the estimated temperature after the completion of cooking, the maximum temperature of the element reached during the process can be predicted as shown in FIG. Therefore, the rice cooking start key is not accepted until it is estimated from the temperature information after cooking that the temperature reached during the next cooking is below the rating of the element. With this configuration, it is possible to realize a hermetic induction heating rice cooker by providing heat storage means instead of a cooling configuration with a fan, and it is possible to always cook rice without exceeding the rated temperature of the parts.
[0016]
(Example 2)
A second embodiment of the present invention will be described with reference to the drawings. In FIG. 4, reference numeral 26 denotes a pan sensor that is in contact with the pan and outputs information on the presence / absence of the pan and the temperature of the pan. Other configurations are the same as those shown in FIG. 1 of the first embodiment. In FIG. 5, the information of the pan sensor 26 is input to the control circuit 16. Other configurations and operations are the same as those in FIG. 2 of the first embodiment.
[0017]
In FIG. 4, the heat generated by the elements of the inverter is stored in the heat storage unit 15. The temperature of the heat storage material is detected by the temperature sensor 17, and the current temperature of the element can be estimated from this information. Moreover, when the next rice cooking is performed from the temperature after the completion of the rice cooking, the maximum temperature reached during the process can be predicted as shown in FIG. 6 because the rice cooking time varies depending on the amount of rice cooking. That is, if the amount of cooked rice is small, the temperature rise is small. Therefore, if the temperature information after cooking and the information on the amount of rice cooked for a certain period of time during rice cooking and the information on the amount of cooking determined by the temperature rise can be estimated that the maximum temperature of the element at that amount of rice exceeds the rating, the rice cooking process is stopped. When the temperature falls below the predetermined temperature, the rice cooking process is performed again. Although power is turned on temporarily, the temperature in the pan does not become high, so there is no effect on the rice cooking performance. Furthermore, if left at medium temperature (about 40 ° C.), there is an effect that the absorption rate of rice is improved. As a result, a hermetic induction heating rice cooker without a fan is possible.
[0018]
(Example 3)
A third embodiment of the present invention will be described with reference to the drawings. In FIG. 7, reference numeral 27 denotes a weight sensor, which detects the weight of rice and water put in the pot. Other configurations are the same as those shown in FIG. 1 of the first embodiment. In FIG. 8, the information of the weight sensor 27 is input to the control circuit 16. Other configurations and operations are the same as those in FIG. 2 of the first embodiment.
[0019]
The heat generated by the inverter elements is stored in the heat storage section 15 of FIG. The temperature of the heat storage material is detected by the temperature sensor 17, and the current temperature of the element can be estimated from this information. Moreover, when the next rice cooking is performed from the temperature after the completion of rice cooking, the maximum temperature reached during the process changes the rice cooking time depending on the amount of rice cooking. That is, if the amount of cooked rice is small, the temperature rise is small. Accordingly, the rice cooking start key is not accepted until it is estimated that the temperature reached during cooking is less than the rating of the element based on the temperature information after cooking and the information of the weight sensor 27 that detects the amount of rice to be cooked next time. As a result, it is possible to make the next cooked rice quickly by using a hermetic induction heating rice cooker without a fan.
[0020]
(Example 4)
A fourth embodiment of the present invention will be described with reference to the drawings. In FIG. 9, 28 is a 2nd temperature sensor, and detects the temperature of the external air in which the rice cooker was set | placed. Other configurations are the same as those shown in the second embodiment. In FIG. 10, information from the temperature sensor 28 is input to the control circuit 16. Other configurations and operations are the same as those in the second embodiment.
[0021]
The heat generated by the elements of the inverter is stored in the heat storage unit 15 in FIG. The temperature of the heat storage material is detected by the temperature sensor 17, and the current temperature of the element can be estimated from this information. Moreover, when the next rice cooking is performed from the temperature after the completion of rice cooking, the maximum temperature reached during the process depends on the amount of rice cooking. That is, if the amount of cooked rice is small, the cooking time is shortened and the temperature rise is small. The amount of heat released from the heat storage material to the inside of the rice cooker and from the housing to the outside air also varies depending on the temperature of the outside air. The more the temperature difference from the outside air is, that is, the lower the outside air temperature is, the more the heat radiation becomes, and the temperature rise of the element can be suppressed. Therefore, accept the key to start cooking until it is estimated that the temperature reached during cooking based on the temperature information after cooking, the information on the weight sensor that detects the amount of rice to be cooked next time, and the temperature of the outside air is below the rating of the element. To lose. As a result, it is possible to perform the next rice cooking more quickly with a hermetically sealed induction heating rice cooker without a fan.
[0022]
(Example 5)
A fifth embodiment of the present invention will be described with reference to the drawings. In FIG. 11, 29 is a display means and displays the current state of the rice cooker. Other configurations are the same as those shown in the third embodiment. In FIG. 12, information is output from the control circuit 16 to the display means 29. Other configurations and operations are the same as those in the fourth embodiment.
[0023]
Accepts the key to start cooking until it is estimated that the temperature reached during cooking based on the temperature information after cooking, information on the weight sensor 6 that detects the amount of rice to be cooked next time, and the temperature of the outside air is below the rating of the element. To lose. Further, the display means 29 displays whether or not cooking is currently possible, and notifies the user. As a result, the next cooked rice can be cooked more quickly with a hermetically sealed induction heating rice cooker without a fan, which can be made easier to use.
[0024]
(Example 6)
A sixth embodiment of the present invention will be described with reference to the drawings. In FIG. 13, 30 is a display means, and displays the current state of the rice cooker. Other configurations are the same as those shown in the fourth embodiment. In FIG. 14, information is output from the control circuit 16 to the display means 30. Other configurations and operations are the same as those in the fourth embodiment.
[0025]
Based on the temperature information after cooking and the temperature of the outside air, the display means 29 displays and notifies how much rice is currently cooked. In addition, if you cook more rice by mistake, we will judge from the information of the weight sensor that detects the amount of rice cooked, and accept the key to start cooking until the temperature reached during cooking is estimated to be less than the rating of the element To lose. As a result, the next cooked rice can be cooked more quickly with a hermetically sealed induction heating rice cooker without a fan, which can be made easier to use.
[0026]
(Example 7)
A seventh embodiment of the present invention will be described with reference to the drawings. In FIG. 15, 10 is a rice cooker body, 11 is an inner pot for adding rice and water, 12 is a body heating coil, 13 is ferrite, 14 is an inverter, 15 is a heat storage unit, 16 is a control circuit, and 18 is for selecting operation. The operation unit 31 is a time measuring means that always measures time. FIG. 16 is a circuit diagram of this. Reference numeral 19 is a switching element that performs switching at high frequency, 20 is a resonance capacitor, 21 is a smoothing capacitor, 22 is a choke coil, 23 is a rectifier, 24 is a driver section, 25 is a power supply circuit, and 31 is a timing means. The operation of this inverter, the configuration for storing heat generated by the elements, and the like are the same as in the first embodiment.
[0027]
The temperature of the element after cooking rice can be estimated by time measurement by the time measuring means 31. That is, when about 1 hour has passed since cooking rice, the heat stored in the heat storage unit is gradually dissipated and returned to room temperature. Even if the temperature is kept for a long time, it is stable at a relatively low temperature. Since the elapsed time after cooking rice, the time kept warm after cooking rice, etc. are measured by the time measuring means 31, the current temperature of the element can be estimated. As a result, it is possible to estimate whether or not the temperature reached during the next cooking is below the rating of the element. Therefore, it is set as the induction heating rice cooker characterized by the structure which did not accept the key of a rice cooking start until the temperature rise was estimated to be below a rating by the information from a time measuring means.
[0028]
(Example 8)
An eighth embodiment of the present invention will be described with reference to the drawings. In FIG. 17, 32 is a display means, and displays the current state of the rice cooker. Other configurations are the same as those shown in the seventh embodiment.
[0029]
In FIG. 18, information is output from the control circuit 16 to the display means 32. Other configurations and operations are the same as those of the seventh embodiment.
[0030]
The temperature of the element after cooking rice can be estimated by time measurement by the time measuring means 31. As a result, it is possible to estimate whether or not the temperature reached during the next cooking is below the rating of the element. Therefore, the information from the time counting means 31 is not accepted until the temperature rise is estimated to be below the rating, and the display means 32 displays whether or not the current rice cooking is possible. As a result, the induction heating rice cooker is characterized in that the next cooking rice can be cooked sooner with the sealable induction heating rice cooker without the fan.
[0031]
Example 9
A ninth embodiment of the present invention will be described with reference to the drawings. The configuration is the same as that of FIG. 1 of the first embodiment and FIG. 15 of the seventh embodiment, but a power reduction signal is sent from the control circuit 16 to the drive unit 24.
[0032]
Therefore, when the temperature reached during the next rice cooking is estimated to be higher than the rating of the element, the output power of the inverter is relatively lowered according to the degree, the heat generation of the inverter is reduced, and the temperature rise of the element is reduced. To avoid exceeding the rating. With this configuration, it is possible to make an induction heating rice cooker of a heat storage system that can always cook rice and does not have a fan.
[0033]
(Example 10)
A tenth embodiment of the present invention will be described with reference to the drawings. The configuration is the same as that of FIG. 1 of the first embodiment and FIG. 15 of the seventh embodiment. Therefore, when the temperature reached during the next cooking is estimated to be higher than the rating of the element, the control circuit 16 makes the cooking process longer than usual. As a result, the time during which the high-frequency current is passed through the heating coil is lengthened by repeatedly turning on and off. As a result, a rapid temperature rise due to the continuous operation of the element can be prevented, and the temperature rise of the element does not exceed the rating. With this configuration, it is possible to make an induction heating rice cooker of a heat storage system that can always cook rice and does not have a fan.
[0034]
(Example 11)
An eleventh embodiment of the present invention will be described with reference to the drawings. The configuration is the same as that of the first embodiment.
[0035]
When the temperature reached during the next cooking is estimated to be higher than the rating of the element, the key of the operation unit is received once. Therefore, a display means such as an LED built in the switch blinks to inform that it is still waiting. Then, after the temperature reached during cooking is estimated to be below the rating of the element, the process proceeds to the cooking process. With this configuration, an induction heating rice cooker having a fan-free configuration is realized.
[0036]
【The invention's effect】
As described above, according to the first to sixth aspects of the present invention, the inverter that converts the commercial power source into a high frequency by the semiconductor switching element, the first heating coil that is excited by the inverter, and the switching of the inverter It has a heat storage part that stores the heat generated by the element and the rectifier element, and a temperature detection means that measures the temperature of the heat storage part. Without using it, it is possible to provide an induction heating rice cooker that appropriately secures use below the rating of the heating element.
[Brief description of the drawings]
FIG. 1 is a block diagram of an induction heating rice cooker according to a first embodiment of the present invention. FIG. 2 is a circuit diagram of the induction heating rice cooker. FIG. 3 is a temperature rise characteristic of elements of the induction heating rice cooker. FIG. 4 is a block diagram of the induction heating rice cooker according to the second embodiment of the present invention. FIG. 5 is a circuit diagram of the induction heating rice cooker. FIG. FIG. 7 is a block diagram of an induction heating rice cooker according to a third embodiment of the present invention. FIG. 8 is a circuit diagram of the induction heating rice cooker. FIG. 9 is an induction according to a fourth embodiment of the present invention. Fig. 10 is a circuit diagram of an induction heating rice cooker. Fig. 11 is a diagram of an induction heating rice cooker according to a fifth embodiment of the present invention. Fig. 12 is a diagram of an induction heating rice cooker. FIG. 13 is a block diagram of an induction heating rice cooker according to a sixth embodiment of the present invention. FIG. 14 is a circuit diagram of the induction heating rice cooker. FIG. 15 is a seventh embodiment of the present invention. FIG. 16 is a circuit diagram of the induction heating rice cooker. FIG. 17 is a configuration diagram of the induction heating rice cooker of the eighth embodiment of the present invention. FIG. 18 is the induction heating rice cooker. Circuit diagram of rice cooker [Fig. 19] Configuration diagram of conventional induction heating rice cooker [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,10 Rice cooker main body 2,11 Inner pan 3,12 Heating coil 4,13 Ferrite 5,14 Inverter 6 Fin 7 Fan 8,18 Operation part 9,16 Control circuit 15 Heat storage part 17,28 Temperature sensor 19 Switching element 20 Resonance capacitor 21 Smoothing capacitor 22 Choke coil 23 Rectifier element 24 Driver unit 25 Power supply circuit 26 Pot sensor 27 Weight sensor 29, 30, 32 Display means 31 Timing means

Claims (6)

An inverter that converts commercial power into high-frequency power, a heating coil that heats the pan with the high-frequency power, a heat storage unit that stores heat from at least the switching element and the rectifying element of the inverter, and gradually radiates heat, and a temperature of the heat storage unit A temperature detection means for measuring, a control means for controlling the rice cooking operation, and a rice cooking start key for operating the rice cooking start, the control means detects the temperature of the heat storage unit by the temperature detection means, this The temperature of the current element can be estimated from the temperature information of the heat storage unit, and from the temperature information of the heat storage unit after the completion of rice cooking, the temperature of the element that reaches during the process when the next cooking of the rice is performed is predicted, If the temperature of the element can be estimated to exceed the rated during cooking, and does not accept the key of the start cooking until the temperature reached during next cooking is estimated to be less than the rated element, Includes a cooking amount determining means for determining cooking amount by a temperature rise at the time of rice, the control means, induction heating obtained by changing the estimated output value during cooking operation of the temperature sensing means in accordance with the output of the cooking amount determining means rice cooker. An inverter that converts commercial power into high-frequency power, a heating coil that heats the pan with the high-frequency power, a heat storage unit that stores heat from at least the switching element and the rectifying element of the inverter, and gradually radiates heat, and a temperature of the heat storage unit A temperature detection means for measuring, a control means for controlling the rice cooking operation, and a rice cooking start key for operating the rice cooking start, the control means detects the temperature of the heat storage unit by the temperature detection means, this The temperature of the current element can be estimated from the temperature information of the heat storage unit, and from the temperature information of the heat storage unit after the completion of rice cooking, the temperature of the element that reaches during the process when the next cooking of the rice is performed is predicted, After accepting the rice cooking start key, if the temperature of the element can be estimated to exceed the rating during cooking, until the temperature reached during the next cooking is estimated to be less than the rating of the element Waits for the start of the rice operation, includes a cooking amount determining means for determining cooking amount by a temperature rise at the time of cooking, the control means estimates during cooking operation of the temperature sensing means in accordance with the output of the cooking amount determining means Induction heating rice cooker with output value changed . An inverter that converts commercial power into high-frequency power, a heating coil that heats the pan with the high-frequency power, a heat storage unit that stores heat from at least the switching element and the rectifying element of the inverter, and gradually radiates heat, and a temperature of the heat storage unit A temperature detection means for measuring, a control means for controlling the rice cooking operation, and a rice cooking start key for operating the rice cooking start, the control means detects the temperature of the heat storage unit by the temperature detection means, this The temperature of the current element can be estimated from the temperature information of the heat storage unit, and from the temperature information of the heat storage unit after the completion of rice cooking, the temperature of the element that reaches during the process when the next cooking of the rice is performed is predicted, If the temperature of the element can be estimated to exceed the rated during cooking, eliminating accepts keys start cooking until the temperature reached during the next cooking is estimated to be less than the rated device, Comprising a weight sensor for detecting the rice quantity, the control means, the induction heating cooker constructed by changing the estimated output value during cooking operation of the temperature sensing means in accordance with the output of the weight sensor. An inverter that converts commercial power into high-frequency power, a heating coil that heats the pan with the high-frequency power, a heat storage unit that stores heat from at least the switching element and the rectifying element of the inverter, and gradually radiates heat, and a temperature of the heat storage unit A temperature detection means for measuring, a control means for controlling the rice cooking operation, and a rice cooking start key for operating the rice cooking start, the control means detects the temperature of the heat storage unit by the temperature detection means, this The temperature of the current element can be estimated from the temperature information of the heat storage unit, and from the temperature information of the heat storage unit after the completion of rice cooking, the temperature of the element that reaches during the process when the next cooking of the rice is performed is predicted, After accepting the rice cooking start key, if the temperature of the element can be estimated to exceed the rating during cooking, until the temperature reached during the next cooking is estimated to be less than the rating of the element Waits for the start of the rice operation, provided with a weight sensor for detecting the cooking amount, the control means, the induction heating cooker constructed by changing the estimated output value during cooking operation of the temperature sensing means in accordance with the output of the weight sensor . An inverter that converts commercial power into high-frequency power, a heating coil that heats the pan with the high-frequency power, a heat storage unit that stores heat from at least the switching element and the rectifying element of the inverter, and gradually radiates heat, and a temperature of the heat storage unit comprising a temperature detection means for measuring, and control means for controlling the 炊 rice operation, and a cooking start key for operating the cooking start, the control unit detects the temperature of the heat storage unit by said temperature detecting means, The temperature of the current element can be estimated from the temperature information of the heat storage unit, and the temperature of the element that reaches during the process when the next cooking of the rice is performed is predicted from the temperature information of the heat storage unit after the completion of rice cooking. , if the temperature of the device can be estimated to exceed the rated during cooking, eliminating accepts keys start cooking until the temperature reached during the next cooking is estimated to be less than the rated device, With outside air temperature detecting means for detecting the temperature information of the gas, the control means is an induction heating cooker which is formed by changing the estimated output value during cooking operation of the temperature sensing means in accordance with the output of the outside air temperature detection means. An inverter that converts commercial power into high-frequency power, a heating coil that heats the pan with the high-frequency power, a heat storage unit that stores heat from at least the switching element and the rectifying element of the inverter, and gradually radiates heat, and a temperature of the heat storage unit A temperature detection means for measuring, a control means for controlling the rice cooking operation, and a rice cooking start key for operating the rice cooking start, the control means detects the temperature of the heat storage unit by the temperature detection means, this The temperature of the current element can be estimated from the temperature information of the heat storage unit, and from the temperature information of the heat storage unit after the completion of rice cooking, the temperature of the element that reaches during the process when the next cooking of the rice is performed is predicted, After accepting the rice cooking start key, if the temperature of the element can be estimated to exceed the rating during cooking, until the temperature reached during the next cooking is estimated to be less than the rating of the element Waits for the start of the rice operation, equipped with outside air temperature detecting means for detecting the temperature information of the outside air, the control means changes the estimated output value during cooking operation of the temperature sensing means in accordance with the output of the outside air temperature detection means induction heating rice cooker made Te.

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