JP3623118B2 - rice cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is based on the heating means for heating the pot, the temperature detecting means for detecting the temperature of the bottom of the pot, and the heating means based on the detected temperature of the temperature detecting means being equal to or higher than the set temperature for stopping heating. The present invention relates to a rice cooker provided with a control means for stopping the heating operation.
[0002]
[Prior art]
In such a rice cooker, by heating the kettle by the heating means, the water in the kettle is absorbed by the rice cooking object (rice grains, etc.) and evaporated to cook rice. When the detected temperature of the temperature detecting means for detecting the temperature of the bottom becomes equal to or higher than the set temperature for stopping heating, the heating operation of the heating means is stopped by the control means.
While sufficient moisture remains in the kettle and the moisture is boiling, the temperature detected by the temperature detecting means is the temperature corresponding to the state where the moisture is boiling in the kettle (for example, from 100 ° C or 100 ° C). The temperature detected by the temperature detecting means rises from a substantially constant state corresponding to the boiling state when the moisture in the kettle decreases. Therefore, the set temperature for stopping heating is set to a predetermined temperature higher than the temperature corresponding to the boiling state.
Conventionally, when the temperature detected by the temperature detection means becomes equal to or higher than the heating stop set temperature, the control means stops the heating operation of the heating means uniformly (that is, without exception).
[0003]
[Problems to be solved by the invention]
By the way, in this rice cooker, even when white rice is cooked, various rice cooking conditions are performed such as cooking with various rice cooking amounts and cooking with various rice cooking menus such as cooked rice and butter rice in addition to white rice Cooking rice is done.
However, in the conventional rice cooker that was designed to stop the heating operation of the heating means uniformly when the detected temperature of the temperature detection means becomes equal to or higher than the set temperature for stopping heating, depending on the rice cooking conditions, there is a large amount of residual moisture in the kettle. Despite the fact that the object to be cooked is not cooked sufficiently (hereinafter may be abbreviated as “uncooked state”), the detected temperature of the temperature detecting means becomes equal to or higher than the set temperature for stopping heating, and the heating means is heated. There was a problem that sometimes stopped.
[0004]
The inventor of the present invention has verified such a phenomenon that the detected temperature of the temperature detecting means becomes equal to or higher than the set temperature for stopping heating even though it is in an uncooked rice state. It turns out to happen.
For example, even when white rice is cooked, it may occur depending on the amount of rice cooked, but it has been found that this is particularly likely to occur when cooking rice other than white rice such as cooked rice or butter rice. When cooking rice such as cooked rice or butter rice, even if a large amount of water remains in the kettle, oil and soy sauce will accumulate at the bottom of the kettle. It may happen that the temperature exceeds the preset temperature.
[0005]
This invention is made | formed in view of this situation, The objective is to provide the rice cooker which can cook rice appropriately irrespective of rice cooking conditions.
[0006]
[Means for Solving the Problems]
According to the characteristic configuration of the first aspect, the control unit counts the elapsed time from the time when the heating unit starts the heating operation, and the time until the set time for the heating maintenance time elapses. , Even if the detection temperature of the temperature detection means exceeds the set temperature for stopping heating, the heating operation of the heating means is continued, and after the set time for maintaining heating has elapsed, the detected temperature is equal to or higher than the set temperature for stopping heating. Then, the heating operation of the heating means is stopped.
As the set time for maintaining the heating, for example, it is set to a time required to cook the rice cooking object such as rice grains to such an extent that it can be eaten without any sense of incongruity.
Therefore, after the start of heating, until the set time for maintaining heating elapses, the detected temperature of the temperature detecting means is set for stopping heating even though the remaining moisture in the kettle is large and the cooking object is not sufficiently cooked. Even when the temperature is higher than the temperature, the heating operation of the heating means is continued until the set time for maintaining the heating elapses at the shortest.
As a result, since heating by the heating means is continued for a set time for heating maintenance at the shortest regardless of the rice cooking conditions, the rice can be properly cooked regardless of the rice cooking conditions.
[0007]
According to the characteristic configuration of the second aspect, the control means detects abnormal heating in which the temperature detected by the temperature detection means is higher than the set temperature for stopping heating until the time measured has passed the set time for heating maintenance. When the temperature exceeds the set temperature, the heating operation of the heating means is stopped.
For example, if the hook is set with foreign matter attached to the bottom of the hook, the temperature detected by the temperature detecting means may become abnormally high. In addition, when the heating means is a gas burner, if the hook is set in a floating state or set in an inclined state, the flame of the gas burner approaches the temperature detection means due to wind or the like, and the detection temperature of the temperature detection means is abnormally high. There is a case.
As the abnormal heating determination set temperature, for example, even if the rice cooking conditions are variously changed, the temperature is set to a temperature that cannot be increased if the pot is set normally.
Therefore, if the temperature at the bottom of the kettle becomes abnormally high, such as when the setting of the kettle is inappropriate, the heating operation of the heating means is stopped, so abnormal cooking due to improper setting of the kettle, etc. It can be stopped as soon as possible.
[0008]
According to the characteristic configuration of the third aspect, the control means stops the heating of the temperature detected by the temperature detection means until the time for measuring the initial abnormality determination time, which is shorter than the heat maintenance setting time, has elapsed. When the temperature becomes equal to or higher than the initial abnormality determination set temperature lower than the set temperature for heating, the heating operation of the heating means is stopped.
For example, the pot is set with no water in it (so-called “cooking”), the pot is set with foreign matter attached to the bottom, or the pot is set in an abnormal posture (floating or inclined) The temperature detection means detects the temperature in a time shorter than the time required for the water to boil in a normal rice cooking state (that is, the kettle is set normally with a predetermined amount of water). Becomes higher than the detected temperature corresponding to the state where water boils.
The initial abnormality determination setting time is set to a time shorter than the time required for water to boil in a normal rice cooking state, for example, and the initial abnormality determination setting temperature is set to, for example, water boiling The temperature is set to a temperature detected by the temperature detecting means corresponding to the existing state or slightly lower than the detected temperature.
Therefore, it is possible to stop abnormal rice cooking caused by empty cooking or inappropriate pot setting as soon as possible.
[0009]
According to the characteristic configuration of the fourth aspect, the control unit stops the heating operation of the heating unit when the timed time reaches the longest heating set time longer than the heating maintenance set time.
For example, when the temperature detection means is in contact with the outer surface of the bottom of the pot to detect the temperature of the bottom of the pot, if there is a foreign object between the temperature detection means and the bottom of the pot, Despite being raised, the temperature detected by the temperature detecting means may not reach the set temperature for stopping heating.
And, as the longest heating set time, in a state longer than the heating maintenance set time, for example, the time that can avoid the burning of the rice cooking object, or the time that can reduce the burning as much as possible Set to.
Therefore, even if a temperature detection abnormality occurs such that the temperature detection means fails or the detected temperature of the temperature detection means does not reach the set temperature for stopping heating even though the rice cooking object is cooked, Since the heating operation is stopped when the longest heating set time elapses at the longest, the loss due to burning can be reduced as much as possible.
[0010]
According to the characteristic structure of Claim 5, the setting means which changes and sets the setting time for heating maintenance and the setting temperature for the heating stop is provided.
That is, in order to cook the rice cooking object as well as possible, the duration of the heating operation by the heating means and the temperature when stopping the heating operation of the heating means are the rice cooking amount, rice cooking menu such as cooked rice and butter rice It is preferable to set according to the above.
Therefore, the setting means can change the setting time for heating maintenance and the set temperature for heating stop according to the rice cooking conditions such as the amount of rice cooked and the rice cooking menu. Can be appropriate.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the rice cooker manages various controls of the rice cooker, a gas burner 2 as a heating means for heating the pot 1, a temperature sensor 3 as a temperature detection means for detecting the temperature of the bottom of the pot 1, and the rice cooker. A control unit 4 and an operation panel 5 provided with various switches for instructing the control unit 4 for various control information and various display units for displaying various information are configured as main components.
[0012]
In the fuel supply path 6 for supplying the fuel gas to the gas burner 2, an electromagnetically operated proportional valve 7 for adjusting the fuel supply amount to the gas burner 2 to adjust the combustion amount of the gas burner 2, and the electromagnetic operation for intermittently supplying fuel. Two on-off valves 8 of the formula are interposed. Further, an igniter 9 for igniting the gas burner 2 and a frame rod 10 for detecting the ignition are provided near the gas burner 2.
The temperature sensor 3 is arranged so as to contact the bottom outer surface of the hook 1 when the hook 1 is installed.
The shuttle 1 is configured to be detachable from a main body provided with a gas burner 2 and the like.
[0013]
The operation panel 5 includes an operation switch 11 for instructing the start of rice cooking, a stop switch 17 for instructing the stop of rice cooking, a rice cooking mode switching switch 12 for switching a rice cooking mode to be described later, a heating maintenance setting time H2 to be described later, and a heating stop A setting unit 13 as a setting means for changing and setting the set temperature T2, a display unit 14 for displaying setting information by the setting unit, a cooking rice lamp 15 for indicating that cooking is being performed, and a display indicating that an abnormality has occurred. An abnormality notification lamp 16 or the like is provided.
[0014]
In addition, in the rice cooking mode changeover switch 12, the rice cooking mode is "normal mode" when cooking rice that has been washed for a predetermined time or more after washing, and "immediate cooking mode" when cooking rice without washing. Can be switched to.
The setting unit 13 is a setting mode changeover switch 13a for switching between a mode for changing and setting the heating maintenance setting time H2 and a mode for changing and setting the heating stop setting temperature T2, and a setting switch for changing and setting the set value. 13b.
[0015]
The control unit 4 is configured by using a microcomputer, and the control unit 4 includes setting information of each of the operation switch 11, the stop switch 17, the rice cooking mode change switch 12, the setting mode change switch 13a, and the setting switch 13b, Detection information of each of the temperature sensor 3 and the frame rod 10 is input, and based on the various input information, the operation of the proportional valve 7, the on-off valve 8, the igniter 9, the display unit 14, the cooking rice lamp 15, and the abnormality notification lamp 16, respectively. Is configured to control.
[0016]
Hereinafter, the control operation of the control unit will be described.
As shown in the flowchart of FIG. 2, the control unit 4 basically activates the igniter 9 and opens the on-off valve 8 to open the gas burner 2 when the operation switch 11 instructs the start of rice cooking. Ignition is performed, the ignition of the gas burner 2 is confirmed by the frame rod 10, and the rice cooking lamp 15 is turned on. Subsequently, the rice cooking mode set by the rice cooking mode changeover switch 12 is executed, and the rice cooking mode is executed. When the cooking is finished, the cooking rice lamp 15 is turned off to notify that the cooking is finished.
[0017]
As shown in FIG. 2, the controller 4 basically has a main cooking process and a steaming process based on the temperature detected by the temperature sensor 3 when the normal mode is commanded by the rice cooking mode changeover switch 12. When the cooking mode is commanded immediately, the preliminary cooking process, the main cooking process, and the steaming process are described based on the temperature detected by the temperature sensor 3. The heating operation of the gas burner 2 is controlled so as to execute sequentially.
In FIG.4 and FIG.5, the relationship between the detection temperature T of the temperature sensor 3 at the time of rice cooking and elapsed time is shown. FIG. 4 shows the relationship between the detected temperature T and the elapsed time when 6 liters of white rice is cooked in the normal mode with a 6 liter rice cooker. FIG. 5 shows the same rice cooker with a 6 liter rice cooking capacity. Shows the relationship between the detected temperature T and the elapsed time when 6 liters of white rice is cooked immediately in the cooking mode. In the figure, a time zone indicated by Mp indicates a preliminary cooking step, a time zone indicated by Mm indicates a main cooking step, and a time zone indicated by Ma indicates a steaming step.
[0018]
In the preliminary cooking step Mp, as shown in FIG. 5, the temperature detected by the temperature sensor 3 is set in advance to a preliminary cooking preset temperature (for example, about 40 to 50 ° C.) stored in the storage unit of the control unit 4 in advance. The amount of combustion of the gas burner 2 is adjusted so that it is maintained for the preset cooking time (for example, about 10-15 minutes) memorize | stored (namely, the opening degree of the proportional valve 7 is adjusted).
In the main cooking process Mm, as shown in FIGS. 4 and 5, when the detected temperature of the temperature sensor 3 becomes equal to or higher than the set temperature T2 for stopping heating set by the setting unit 13, the gas burner is closed by closing the on-off valve 8. 2 is extinguished and the heating operation is stopped, but until the heating operation is stopped, the gas burner 2 is burned under the combustion conditions for the main cooking process. As the combustion conditions for the main cooking process, for example, the gas burner 2 is burned while adjusting the combustion amount so that the temperature detected by the temperature sensor 3 changes in a temperature curve stored in advance.
As shown in FIG.4 and FIG.5, the steaming process ma continues for the set time for steaming (for example, about 15 to 20 minutes) memorize | stored previously after completion | finish of this cooking process Mm.
[0019]
In the present invention, the control unit 4 counts the elapsed time H from the time when the main cooking process Mm is started (that is, when the heating operation of the gas burner 2 is started), and the time H is set. The heating operation of the gas burner 2 is continued until the detected temperature T of the temperature sensor 3 is equal to or higher than the set temperature T2 for stopping heating until the heating maintenance set time H2 set in the section 13 elapses. After the time H has passed the heating maintenance set time H2, the gas burner 2 is extinguished (that is, the heating operation of the gas burner 2 is stopped) when the detected temperature T becomes equal to or higher than the heating stop set temperature T2. It is.
[0020]
Further, when the detected temperature T becomes equal to or higher than the abnormal heating determination set temperature T3 that is higher than the heating stop set temperature T2 until the time count H has passed the heating maintenance set time H2, the control unit 4 detects the gas burner. 2 is extinguished (that is, the heating operation of the gas burner 2 is stopped).
[0021]
Further, the control hand 4 starts the initial period when the detected temperature T is lower than the set temperature T2 for stopping heating until the time H is passed the set time H1 for initial abnormality determination that is shorter than the set time H2 for maintaining the heating. The gas burner 2 is extinguished (that is, the heating operation of the gas burner 2 is stopped) when the temperature reaches the abnormality determination set temperature T1 or higher.
Further, the control unit 4 is configured to extinguish the gas burner 2 (that is, to stop the heating operation of the gas burner 2) when the timing time H reaches the longest heating setting time H3 longer than the heating maintenance setting time H2. It is.
The initial abnormality determination setting temperature T1, the heating stop setting temperature T2, and the abnormal heating determination setting temperature T3 have a relationship of T1 <T2 <T3, and the initial abnormality determination setting temperature T1 and the heating maintenance setting time H2 are satisfied. The longest heating set time H3 has a relationship of H1 <H2 <H3.
[0022]
The heating maintenance set time H2 and the heating stop set temperature T2 can be appropriately changed and set by the user of the rice cooker by the setting unit 13 according to the amount of rice cooked or the like.
4 and 5 are data when the set temperature T2 for stopping heating is set to 125 ° C.
As shown in FIG. 4 and FIG. 5, when cooking 6 liters of white rice in a normal mode with a rice cooker with a cooking capacity of 6 liters, and when cooking in the immediate cooking mode, the main cooking process Mm is started. The elapsed time of the main cooking process Mm is about 17 minutes from when the detected temperature T of the temperature sensor 3 becomes equal to or higher than the heating stop set temperature T2 and the main cooking process Mm ends. Therefore, the heating maintenance set time H2 is, for example, about 16 minutes, which is slightly shorter than 17 minutes of the elapsed time of the actual main cooking process Mm when cooking 6 liters of white rice with a 6 liter rice cooker. Set. Moreover, when 3 liters of white rice is cooked with a 6 liter rice cooker, the actual time of the main cooking process Mm is about 15 minutes and 30 seconds, so the heating maintenance set time H2 is, for example, 15 minutes. Set to degree. Note that a guideline for setting the heating maintenance set time H2 and the heating stop set temperature T2 is clearly described in the instruction manual or the like.
[0023]
The initial abnormality determination setting time H1, the longest heating setting time H3, the initial abnormality determination setting temperature T1, and the abnormal heating determination setting temperature T3 are set in advance in accordance with the rice cooking capacity of the target rice cooker. And stored in the storage unit of the control unit 4. Hereinafter, how to set the initial abnormality determination setting time H1, the longest heating setting time H3, the initial abnormality determination setting temperature T1, and the abnormal heating determination setting temperature T3 will be described.
[0024]
As long as the pot 1 is set normally with water in it, the time required for the water in the pot 1 to boil after starting the main cooking step Mm (approximately 10 minutes in FIGS. 4 and 5) By the time, the temperature T detected by the temperature sensor 3 cannot be higher than the temperature corresponding to the state in which moisture is boiling in the pot 1 (approximately 100 ° C. in FIGS. 3 and 4).
Therefore, for example, in the case of a rice cooker having a rice cooking capacity of 6 liters, the initial abnormality determination set time H1 is set to about 5 minutes, for example, and the initial abnormality determination set temperature T1 is set to about 100 ° C., for example. .
[0025]
The longest heating set time H3 is slightly longer than the expected elapsed time of the main cooking process Mm in consideration of the difference in rice cooking conditions (the amount of rice cooking, the type of rice cooking such as white rice, cooked rice, butter rice). Set to. For example, in the case of a rice cooker having a rice cooking capacity of 6 liters, the elapsed time of the main cooking process Mm is about 17 minutes as shown in FIGS. 4 and 5, so the longest heating set time H3 is about 22 minutes, for example. Set.
[0026]
The abnormal heating determination set temperature T3 is set to a temperature that cannot be increased in the main cooking step Mm in consideration of the difference in rice cooking conditions when the pot 1 is set normally. For example, in the case of a rice cooker having a rice cooking capacity of 6 liters, the maximum temperature in the main cooking process Mm is 140 ° C. or lower as shown in FIGS. Set to about C.
[0027]
Next, based on the flowchart shown in FIG. 3, the control action | operation of the control part 4 in a main cooking process is demonstrated.
Based on the rice cooking start command by the operation switch 11 in the normal mode, and in the immediate cooking mode, if there is a command to start the main cooking process based on the end of the preliminary cooking process, the gas burner 2 is used for the main cooking process. And the elapsed time H is started (steps # 1 and # 2).
Subsequently, it is determined whether or not the detected temperature T is equal to or higher than the initial abnormality determination setting temperature T1 until the time count H has passed the initial abnormality determination setting time H1 (steps # 3 and # 4).
If the detected temperature T does not become equal to or higher than the initial abnormality determination setting temperature T1 before the time measurement time H has passed the initial abnormality determination setting time H1, then the time measurement time H becomes the heating maintenance setting time. Until H2 elapses, it is determined whether or not the detected temperature T is equal to or higher than the abnormal heating determination temperature T3 (steps # 5 and # 6).
If the detected temperature T does not become equal to or higher than the preset temperature T3 for abnormal heating determination after the time H has passed the initial abnormal judgment set time H1 and before the heating maintenance set time H2 has elapsed, Until the measured time H elapses the longest heating set time H3, it is determined whether or not the detected temperature T is equal to or higher than the heating stop set temperature T2. Is closed, the gas burner 2 is extinguished, the main cooking process is terminated, and the next steaming process is started (steps # 7 to # 9).
If the detected temperature T does not become equal to or higher than the set temperature T2 for heating stop after the set time H2 for heating maintenance has elapsed and the set time H3 for maximum heating has elapsed, the measured time H When reaching the longest heating set time H3, the gas burner 2 is extinguished, the main cooking process is terminated, and the next steaming process is started.
[0028]
When the detected temperature T becomes equal to or higher than the initial abnormality determination setting temperature T1 before the time measurement time H has passed the initial abnormality determination setting time H1, and the time measurement time H is equal to the initial abnormality determination setting time H1. If the detected temperature T becomes equal to or higher than the abnormal heating determination temperature T3 after the elapse of the heating maintenance setting time H2, the gas burner 2 is extinguished and the abnormality notification lamp 16 is turned on. Wait (steps # 10 and # 11).
In the state where the abnormality notification lamp 16 is turned on and the standby state is reset, the stop switch 17 is turned on and the standby state is reset. When operated and the start of cooking rice is commanded by the operation switch 11, the main control shown in FIG. 2 is executed.
[0029]
Accordingly, even if the detected temperature T is equal to or higher than the set temperature T2 for stopping heating until the set time H2 for heating maintenance is elapsed after the set time H1 for determining the initial abnormality is elapsed after the timing time H has elapsed, the abnormal heating determination is performed. The heating operation of the gas burner 2 is continued as long as the temperature does not become equal to or higher than the set temperature T3, and after the time H has passed the set time H2 for maintaining the heating, when the detected temperature T becomes equal to or higher than the set temperature T2 for stopping heating, The heating operation of the gas burner 2 is stopped, and the main cooking process ends.
[0030]
[Another embodiment]
Next, another embodiment will be described.
(B) In the above embodiment, the case where the heating maintenance set time H2 and the heating stop setting temperature T2 are configured to be changeable is exemplified, but either one or both of them is exemplified. Alternatively, it may be set in advance according to the model based on the rice cooking capacity of the rice cooker and stored in the storage unit of the control unit 4.
The set temperature T2 for stopping heating is set to, for example, about 125 ° C. when the rice cooking capacity is 4 liters and 6 liters, and about 120 ° C. when the rice cooking capacity is 9 liters.
Moreover, the set time H2 for heating maintenance is set to about 17 minutes when the rice cooking capacity is 6 liters, for example.
[0031]
Moreover, when setting and memorize | stores the setting time H2 for heating maintenance, and the setting temperature T2 for a heating stop beforehand, you may make it set and memorize | store for every rice cooking amount.
In this case, a rice cooking amount setting unit for setting the rice cooking amount is provided, and the storage information corresponding to the rice cooking amount set by the rice cooking amount setting unit is read and used.
The heating maintenance set time H2 is set to about 17 minutes when the rice cooking capacity is 6 liters and when the amount of rice cooking is 6 liters, and about 15 minutes and 30 seconds when the rice cooking amount is 3 liters, for example. .
Therefore, rice can be cooked under appropriate conditions according to the amount of rice cooked, so that the rice cooking state can be made even better.
[0032]
In addition, when setting and storing the heating maintenance setting time H2 and the heating stop setting temperature T2 in advance, it is set and stored for each rice cooking mode of “normal mode” and “immediate cooking mode”. You may make it read and use the memory | storage information corresponding to the rice cooking mode set in the part 13. FIG. Therefore, rice can be cooked under appropriate conditions according to the rice cooking mode, so that the rice cooking state can be further improved.
In addition, a menu setting switch for setting rice cooking menus such as white rice, cooked rice, butter rice, etc. is provided, and setting time H2 for heating maintenance and setting temperature T2 for heating stop are set and stored for each rice cooking menu. The stored information corresponding to the menu set by the setting switch may be read and used. Therefore, rice can be cooked under appropriate conditions according to the rice cooking menu, so that the rice cooking state can be further improved.
[0033]
(B) When the initial abnormality determination setting time H1, the longest heating setting time H3, the initial abnormality determination setting temperature T1, and the abnormal heating determination setting temperature T3 are set in advance and stored in the storage unit of the control unit 4. Alternatively, it may be set and stored for each amount of cooked rice. In this case, a rice cooking amount setting unit for setting the rice cooking amount is provided, and the storage information corresponding to the rice cooking amount set by the rice cooking amount setting unit is read and used. Therefore, rice can be cooked under appropriate conditions according to the amount of rice cooked, so that the rice cooking state can be made even better.
[0034]
Further, it may be set and stored for each rice cooking mode of “normal mode” and “immediate cooking mode”, and the stored information corresponding to the rice cooking mode set in the setting unit 13 may be read and used. . Therefore, rice can be cooked under appropriate conditions according to the rice cooking mode, so that the rice cooking state can be further improved.
Moreover, while setting for every rice cooking menu, the menu setting switch which sets a rice cooking menu may be provided, and you may make it read and use the memory information corresponding to the menu set with the menu setting switch. Therefore, rice can be cooked under appropriate conditions according to the rice cooking menu, so that the rice cooking state can be further improved.
[0035]
(C) Set initial abnormality determination setting time H1, heating maintenance setting time H2, longest heating setting time H3, initial abnormality determination setting temperature T1, heating stop setting temperature T2, and abnormal heating determination setting temperature T3. The specific values for the above are not limited to the values exemplified in the above embodiment, and can be changed as appropriate.
[0036]
(D) The combustion conditions for the main cooking process Mm are limited to those for adjusting the combustion amount so that the temperature detected by the temperature sensor 3 changes in a pre-stored temperature curve as exemplified in the above embodiment. Is not to be done.
For example, the amount of combustion is large until the temperature detected by the temperature sensor 3 reaches a temperature that is preset and stored (set lower than the set temperature T2 for stopping heating), and thereafter, the temperature sensor 3 The gas burner 2 may be burned with a small amount of combustion until the detected temperature reaches the set temperature T2 for stopping heating.
[0037]
(E) A heating means for keeping warm may be provided, and after the steaming process, a warming process for keeping warm the cooked white rice and the like by the heating action of the heating means for keeping warm may be automatically executed.
(F) The specific configuration of the heating means is not limited to the gas burner 2 illustrated in the above embodiment. Various things such as an electric heater can be used.
[Brief description of the drawings]
FIG. 1 is a block diagram of a rice cooker according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a control operation of the rice cooker according to the embodiment of the present invention.
FIG. 3 is a view showing a flowchart of control operation of the rice cooker according to the embodiment of the present invention.
FIG. 4 is a diagram showing a relationship between a temperature detected by a temperature sensor and an elapsed time.
FIG. 5 is a diagram showing the relationship between the temperature detected by the temperature sensor and the elapsed time.
[Explanation of symbols]
1 kettle
2 Heating means
3 Temperature detection means
4 Control means
13 Setting means

Claims (5)

Heating means for heating the kettle;
Temperature detecting means for detecting the temperature of the bottom of the pot;
A rice cooker provided with a control means for stopping the heating operation of the heating means based on the detected temperature of the temperature detecting means being equal to or higher than the set temperature for stopping heating,
The control means measures an elapsed time from the time when the heating operation of the heating means is started, and the detected temperature of the temperature detection means is the time until the measured time has passed the set time for maintaining the heating. When the heating means continues heating operation even when the heating stop set temperature or higher, and the time measured has passed the heating maintenance set time, the detected temperature becomes the heating stop set temperature or higher. A rice cooker configured to stop the heating operation of the heating means. When the detected temperature is equal to or higher than the preset temperature for determining abnormal heating that is higher than the preset temperature for stopping heating until the measured time has passed the preset time for heating maintenance, the control means The rice cooker according to claim 1, wherein the rice cooker is configured to stop the heating operation. The control means has an initial abnormality determination setting in which the detected temperature is lower than the heating stop set temperature until the initial abnormality determination set time that is shorter than the heating maintenance set time elapses. The rice cooker of Claim 1 or 2 comprised so that the heating action of the said heating means may be stopped when it becomes more than temperature. The said control means is comprised so that the heating operation of the said heating means may be stopped, if the time measured reaches the longest heating set time longer than the said heating maintenance set time. Item 1. Rice cooker. The rice cooker of any one of Claims 1-4 by which the setting means which changes and sets the setting time for the said heating maintenance and the said setting temperature for a heating stop is provided.

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