JPH0556963B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rice cooking jar, and in particular, a rice cooker that appropriately controls the shading process after the completion of the rice cooking process, and
The present invention relates to a rice cooking jar capable of cooking rice with less uneven cooking even when the rice cooking capacity is large.

[Conventional technology]

Currently, rice cookers on the market are a combination of an electric rice cooker and a warming jar. In such a rice cooker, a heater is provided at the bottom of the inner pot, and heating power is supplied to the heater to cook rice. In addition, a heat-retaining heater is provided on the lid of the inner pot or the body of the inner pot to keep the rice warm, and after the rice is cooked, the energization of the heater is controlled to keep the cooked rice warm. this is,
This is to ensure that the cooked rice is always warm when eaten.

Also, with the aim of cooking delicious rice,
A controller equipped with a temperature sensor and a microcomputer measures the temperature of the rice cooking pot, inputs data on the temperature or temperature rise into the microcomputer, determines the rice cooking capacity, and performs appropriate power control according to the rice cooking capacity. Microcomputer-controlled automatic rice cookers, so-called microcomputer rice cookers, have been developed. An automatic rice cooker that cooks rice under the control of a microcomputer uses the program control of the microcomputer to sequentially:
A series of rice cooking process controls such as water absorption process, rice cooking capacity determination process, cooking process, boiling maintenance process, first simmering process, additional cooking process, second simmering process, and heat retention process are performed to cook rice in the optimal condition. After the rice cooking control is performed, the heat retention control state is entered. In this way, microcomputer-controlled rice cookers can finely control the rice cooking process through program control, so by being equipped with programs for multiple types of rice-cooking control patterns, they can be used for multi-function rice cooking, quick-cooking rice, timer reservation rice cooking, and ripening notification. ,
It is equipped with various convenient functions such as cooking rice immediately after washing.

[Problem to be solved by the invention]

In this way, in rice cooking control in a jar-type automatic rice cooker that cooks rice under microcomputer control, each heater is energized by a temperature detection signal from a temperature sensor.
The rice cooking process is controlled by controlling the cooking process including determining the rice cooking capacity and controlling the unevenness process following the cooking process. In this case, in the cooking control, the rice cooking capacity is determined by calculating backwards from the temperature change rate of the corresponding heat capacity, and the energization of each heater is controlled to appropriately heat the rice based on the determined rice cooking capacity. However, when the rice cooking capacity is large, there is a problem that a temperature difference between the top and bottom tends to occur, and uneven cooking tends to occur.

The present invention has been made to solve the above problems.

The purpose of the present invention is to appropriately control the shading process after the end of the cooking process in rice cooking control,
To provide a rice cooker capable of cooking rice with less unevenness even when the rice cooking capacity is large.

[Means to solve the problem]

In order to achieve the above object, the rice cooker of the present invention includes a temperature sensor provided near the bottom of the inner pot, a rice cooking heater provided at the bottom of the inner pot, a heat retention heater provided in the body of the inner pot, and a temperature sensor. A rice-cooking heat-retaining jar having a control means for controlling the energization of each heater based on a temperature detection signal from the heater, controlling the rice-cooking process including determining the rice-cooking capacity, controlling the unevenness process following the rice-cooking process, and controlling the rice-cooking process. The control means is characterized in that it holds rice cooking capacity data determined in the cooking process, and controls the shading temperature according to the rice cooking capacity data held in the shading process control.

In addition, the uneven temperature controlled by the control means according to the rice cooking capacity data held in the uneven process control is a temperature higher than the standard temperature when the rice cooking capacity is large, and a temperature lower than the standard temperature when the rice cooking capacity is small. It is characterized by:

[Operation] According to the above-described means, the control means that controls the energization of each heater based on the temperature detection signal from the temperature sensor performs the cooking process control including rice cooking capacity determination and the unevenness process control following the rice cooking process. When the rice cooking process control is performed, in this case, the rice cooking capacity data determined in the cooking process is held, and the shading temperature is controlled according to the rice cooking capacity data held in the shading process control. The uneven temperature controlled according to the rice cooking capacity data held here is set higher than the standard temperature when the rice cooking capacity is large, and is set lower than the standard temperature when the rice cooking capacity is small.

As a result, even when cooking a large amount of rice that is likely to cause variations in rice cooking capacity determination and uneven cooking, by setting the varnishing temperature to a high temperature, appropriate rice cooking control in the varnishing process can be applied. Can prevent unevenness.

〔Example〕

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

FIG. 1 is a sectional view of a rice cooker according to an embodiment of the present invention. In FIG. 1, 1 is the rice cooker main body, 2 is the lid of the rice cooker main body 1, and 3 is the main body of the rice cooker main body 1. The main body 3 includes an inner pot 4, an inner pot storage container 5 for storing the inner pot, a rice cooking heater 6 at the bottom of the inner pot, a shoulder ring 7 provided on the shoulder of the inner pot storage container, and a shoulder of the inner pot storage container. A heat-retaining heater (hereinafter referred to as a shoulder heater) 8 provided in the shoulder ring of the inner pot storage container, a heat-retaining heater (hereinafter referred to as a heat-retaining heater) 9 provided in the body of the inner pot storage container, a control unit 10 incorporating a microcomputer, etc. etc. are provided inside. Further, the inner pot 4 has a shoulder portion in contact with the pot lid 4a, and an upper portion thereof is covered with the pot lid 4a. The pot lid 4a is formed by molding a material with high thermal conductivity, for example, aluminum. The temperature sensor 25 is provided in a sensor case placed in close contact with the pot lid 4a. Furthermore, a temperature sensor 29 is provided at the bottom of the inner pot. 11 is a function display selection operation unit.

The function display selection operation unit 11 is the rice cooker main body 1.
The function display selection operation unit 11 includes a plurality of operation key switches, light emitting diodes for displaying various statuses, and a 7-segment character display for displaying the time, as will be described later. is provided. The operation key switches include an hour key switch, a minute key switch, a reservation key switch, a menu key switch, a start key switch, and a cancel key switch.

FIG. 2 is a front view showing the panel surface of the function selection operation unit. In FIG. 2, 12 is a character display, for example, a 4-digit numerical display liquid crystal module that displays the characters of each display digit in 7 segments. The character display 12 displays the time as well as a reserved time for reserved rice cooking or the like. 13a is a key switch for operating the hour digit; 13b is a minute key switch for operating the minute digit;
3c is a reservation key switch for instructing reservation, 13d
13e is a menu key switch for instructing the rice cooking menu; 13e is a start key switch for instructing the start of rice cooking operation or the start of reserved rice cooking operation; 13f
is a cancel key switch that cancels each operation.
Further, 14 is a status display section that displays the operation mode. The status display section 14 is provided with a plurality of light emitting diodes that display various statuses of the rice cooking and warming jar. The states to be displayed are "Reservation 1", "Reservation 2", "White rice", and "Quick cooking" to display the reservation mode distinction, the rice cooking menu type of rice cooking control, and the keep warm mode distinction, respectively. ”
,
Light-emitting diodes labeled ``cooked'', ``cooked rice'', ``brown rice'', ``porridge'', ``keep warm'', and ``keep warm'' are lit to display various statuses.

FIG. 3 is a block diagram showing the configuration of main parts of a control unit using a microcomputer.
In FIG. 4, 6 is a rice cooking heater, 8 is a shoulder heater, 9 is a heat retention heater, 10 is a control unit, and 11
Reference numeral 25 indicates a function display selection operation unit, 25 indicates a lid temperature sensor (hereinafter referred to as a lid sensor), and 29 indicates a bottom temperature sensor provided at the bottom of the inner pot (hereinafter referred to as a bottom sensor). )
It is. As mentioned above, the function display selection operation unit 11 includes a 7-segment character display 12,
Operation key switches 13, 13a to 13f and a light emitting diode of a status display section 14 are provided. Further, 15 is a commercial AC power supply, and 16 is a temperature fuse. The control unit 10 includes a relay 17 for switching between rice cooking mode and warming mode, a triax 18 for controlling the energization of the rice cooking heater 6, a triax 19a for controlling the energization of the warming heater 9, and a triax for controlling the energization of the shoulder heater 8. 19b, a microcomputer 20, a clock mechanism 21, a buzzer 22, and the like. A temperature sensor (lid sensor 25) provided on the lid of the inner pot is composed of a thermistor or the like. Further, a bottom temperature sensor (bottom sensor 29) provided at the bottom of the pot is similarly composed of a thermistor or the like. These temperature sensors are
Detects temperature and outputs an electrical signal corresponding to the temperature. The electrical signal corresponding to the temperature is input to the analog/digital conversion port of the microcomputer 20. The microcomputer 20 internally includes a processing unit CPU, memory RAM, and program memory.
It has a built-in ROM, an input port with an analog/digital conversion function, multiple input ports that accept key switch input, an output port that outputs control output signals and display control signals, etc. According to the program stored in the program memory,
A predetermined output signal is output from the output port in response to the input from the input port. That is, the microcomputer 20 receives input from each temperature sensor (lid sensor 25, bottom sensor 29), clock mechanism 21, and operation key switch 13, performs a series of processes according to a built-in processing program, and controls the energization of the heater. It sends out a control signal to a triax etc. that performs this, and also sends out a lighting control signal to the light emitting diode of the status display section 14 in order to display the status such as the operation mode. Further, the time signal from the clock mechanism 21 is input to the microcomputer 20, and the time is displayed on the character display 12.
The signal is input to the microcomputer 20 and used as a signal for determining the reserved time when timer reserved rice cooking is performed.

Next, the operation of the rice cooking/warming jar configured in this way will be explained.

FIG. 4 is a flow chart showing an outline of the overall control flow of the microcomputer. Fourth
This will be explained with reference to the figures.

When the power is turned on, in step 31,
Performs preprocessing for rice cooking control. In the preprocessing for this rice cooking control, initialization processing is performed to reset various internal registers, timers, etc. of the microcomputer.
Setting processing of rice cooking operation instruction data such as rice cooking menu setting and rice cooking reservation time setting is performed, and then, when the start key switch is turned on (or when the reserved time comes in the case of reserved rice cooking), the processing starts from step 32. I do. In step 32, in order to control rice cooking, the relay is turned on and the rice cooking heater circuit is turned on. Next, the rice cooking process control in step 33 is performed. As a result, a rice cooking operation is performed to cook the rice. When the rice cooking operation is completed, in step 34, the relay is turned off, the rice cooking heater circuit is turned off, and a heat retention control mode is set in which heat retention control is performed to keep the cooked rice warm. In the heat retention control mode, processing from step 35 is performed.

In this heat retention control mode, normal heat retention control is performed in step 35, and in the next step 36, it is determined whether or not there is a temperature abnormality. If the temperature is abnormal, error processing such as abnormality notification and abnormality display is performed in step 37, and the entire process is terminated. If the temperature is not abnormal in step 36, the process returns to step 35 and the normal heat retention control is repeated.

Next, the general operation of the rice cooking control process controlled by the microcomputer configured as described above will be explained.

When the desired amount of rice and the appropriate amount of water are put into the inner pot 4 and the start key switch is turned on, the microcomputer 20 of the control unit 10 starts the processing steps of the rice cooking program stored in the program memory ROM therein. Then, power control for heating in the rice cooking process is started. At this time, the microcomputer 20 controls the lid sensor 2.
5 and the bottom sensor 29 is converted into a digital quantity and inputted from the input port A/D of the analog/digital conversion function, the process of converting it to temperature is performed, the input temperature is determined, and the temperature is calculated. Various rice cooking processes are controlled based on the determination results. In this rice cooking process, in the initial stage of rice cooking, a water absorption process is performed in which the heating power is reduced and the rice absorbs water. Next, the heating power is increased, the rice cooking capacity at a predetermined temperature is determined, the rice is rapidly raised in temperature to perform a boiling process, and a boiling maintenance process is performed to maintain boiling. This boiling maintenance process continues, and when the rice absorbs enough water and the moisture at the bottom of the inner pot disappears and reaches a predetermined temperature, for example 130℃,
This temperature is detected by the bottom sensor 29, and the microcomputer 20 turns off the heating heater to complete the boiling maintenance process. Next, a shading process including additional cooking is performed, and finally a warming process is performed to complete the rice cooking process. When the rice cooking process control is finished, the process moves to the warming process control.

Figure 5 shows the inner pot 4 when the rice cooking process is controlled by such microcomputer control.
It is a figure which shows an example of the rice cooking temperature curve which shows the temperature change. In FIG. 5, the area indicates the water absorption process, the area indicates the cooking process including the rice cooking capacity determination process, and the area indicates the boiling maintenance process. The area indicates the uneven process including additional cooking, and the area indicates the transition area to the warming process.

The region water absorption step is a step in which low heating is continued for a predetermined period of time to allow the rice to sufficiently absorb water.
The region cooking process is a process in which the heating power is increased to rapidly raise the temperature, bring it to a boil, and continue to the boiling maintenance process. This cooking process includes a process of determining the rice cooking capacity (judging the total number), and in this rice cooking capacity determination process, the rice cooking capacity value is determined, and the energization of each heater is controlled according to the determined rice cooking capacity value. Then, cook and bring to a boil, then continue with the boiling maintenance process. In the area boiling maintenance process,
The heating power is appropriately controlled according to the determined rice cooking capacity data to maintain boiling. The rice cooking capacity data determined here is held in order to be used as data for controlling energization of each heater in controlling the unevenness process of the next area.

In the area unevenness process, using the rice cooking capacity data determined in the previous cooking process,
The temperature for uniformly cooking rice is determined, the uniformly cooking process is completed for a predetermined time, and the series of control of the rice cooking process is completed. Then, the process continues to the area heat retention control process.

In addition, in the rice cooking temperature curve shown in Fig. 5,
The broken line shows the case where the amount of cooked rice is large, the dashed line shows the case where the amount of cooked rice is medium, and the solid line shows the case where the amount of cooked rice is small. Only in the control of the region unevenness process, rice cooking control is performed by changing the temperature when heater energization control is performed according to the determined rice cooking capacity data.

FIGS. 6a and 6b are flowcharts showing the processing flow of the control operation of the rice-cooking process including the rice cooking capacity determination process, the boiling maintenance process, and the simmering process including additional cooking, which are performed by the microcomputer of the control unit.

First, reference is made to FIG. 6a. When the water absorption process is completed, the cooking process begins and the processing starts from step 40. In step 40, the rice cooking heater is turned on at 14/14 to start cooking with full power supply. In this case, in step 40, the rice cooking heater is turned on, and in the next step 41, it is determined whether the temperature is 71° C. or lower. If the temperature is below 71°C, continue to fully energize the rice cooker heater in step 40. Fully energize the rice cooker heater, and in the next step 41, 71
If it is determined that the temperature exceeds ℃, the next step is
The rice cooking capacity determination (combined number determination) process from step 42 is performed.

In the sum determination process, it is determined in step 42 whether or not the temperature is below the reference temperature Tm°C.
If the temperature is below Tm℃, turn on the rice cooking heater in step 45, and if the temperature is not below Tm℃, turn on the rice cooker in step 45.
In step 43, the rice cooking heater is turned off, then in step 44, the time is integrated in S, and then in step 46
Determine whether the time tn seconds has elapsed. The process returns to step 42 and repeats the process from step 42 until tn seconds have elapsed. tn in step 46
Once the elapse of seconds has been determined, the process proceeds to step 47, where it is determined whether m=n. If m is not equal to n, m is incremented by 1 in the next step 48, and the process returns to step 42, where the processing from step 42 is repeated. That is, the process from step 42 is repeated n times.

If it is determined in step 47 that the process from step 42 has been completed n times, the value of time integration (S) at this time corresponds to the rice cooking capacity, so this value of S is used to proceed to the next step. Perform the processing from step 49. In the process from step 49, the rice cooking heater and the heat-retaining heater are controlled to be energized according to the obtained summation determination value [time integration value (S)], and rice is cooked with an appropriate heating amount controlled by the energization control.

Next, in steps 49 and 52, the time integration value S is determined, and power control for heating the rice is performed according to the determined value (rice cooking capacity). Heating power control is performed by controlling the amount of heating power by on/off control in which the rice cooking heater and the warming heater are repeatedly turned on and off at regular time intervals.

That is, first, in step 49, it is determined whether the content of the integrated value S is less than a predetermined value S1. If the content of the integrated value S is not less than S1, the process advances to step 52 and the content of the integrated value S is S1≦S<
Determine whether it is S2.

In step 49, if the content of the integrated value S is less than S1, the process proceeds to step 50, where heating power control is performed in which the rice cooking heater is turned on at 14/14, and in step 51, the warming heater is turned off. Then, the process proceeds to step 57, where heating control is performed until the cooking temperature exceeds 130°C.

In step 49, when the content of the integrated value S is greater than or equal to S1, the process further proceeds to step 52, where it is determined whether the content of the integrated value S is S1≦S<S2, and the content of the integrated value S is S1≦ If S<S2, then in step 53 the rice cooking heater is turned on at 12/14, and in step 54 heating power control is performed to turn on the warming heater at 2/14. Then, the process proceeds to step 57, where heating control is performed until the cooking temperature exceeds 130°C.

In addition, in the judgments of step 49 and step 52, if the content of the integrated value S is S2<S,
Next, in step 55, turn on the rice cooker at 10/14,
In step 56, heating power control is performed to turn on the heat retaining heater at 4/14. Then, the process proceeds to step 57, where heating control is performed until the cooking temperature exceeds 130°C.

In this way, the amount of heating power is controlled according to the determined rice cooking capacity value (in the example, the time integrated value S), and after confirming that the temperature of the inner pot exceeds 130°C, the rice is cooked. Finish the control of the lifting process.

This completes the control of the cooking process, and the process then proceeds to the shading process (FIG. 6b).

See Figure 6b. In controlling the unevenness process, first, in step 60, the rice cooking heater is turned off, and then, in step 61, the warming heater is turned off. Next, in step 62, the character display of the display unit lights up the irregularity display as "12", and in step 63, irregularity subtraction for subtracting the irregularity time in minutes is started. Next, in step 64, the remaining uneven heating time is determined, and some uneven heating is performed during the uneven heating time from the next step 65 to step 82 until the remaining uneven time in minutes becomes "0". Perform rice cooking control including. In this irregular rice cooking control, the value of the cumulative time value S corresponding to the rice cooking capacity determined in the previous cooking process is held, and the value of the stored cumulative time value S is used. Then, rice cooking heating control including partial uneven heating during the uneven heating time is performed.

First, in step 65 and step 66,
The value of the cumulative time value S is determined, and the energization of each heater is controlled in each case based on the determination result. That is,
Power control for uneven heating is performed according to the time integration value S (rice cooking capacity).

First, in step 65, it is determined whether the content of the integrated value S is less than a predetermined value S1. If the content of the integrated value S is not less than S1, proceed to the next step.
Proceeding to 66, it is determined whether the content of the integrated value S satisfies S1≦S<S2.

If it is determined in step 65 that the content of the integrated value S is less than S1, the process proceeds to step 68,
Determine whether the temperature of the inner pot is 112°C or less.
If it is not below 112℃, the high temperature immediately after cooking is still persisting, and the rice cooking heater is turned off in step 69, the warming heater is turned off in the next step 70, and the process returns to step 64 to calculate the remaining uneven time. The process continues from determining whether or not the value is "0". On the other hand, if it is determined in step 68 that the temperature of the inner pot is 112°C or lower, the process proceeds to step 71, where the rice cooker is turned on at 2/14, and in step 72, to perform uneven heating control. Performs heating power control to turn on the heat retention heater on December 14th. Then, the process returns to step 64 and continues the process from determining whether the remaining unevenness time is "0".

Also, in step 65, the contents of the integrated value S are
If S1 or more, the process further proceeds to step 66, where it is determined whether or not the content of the integrated value S satisfies S1≦S<S2. If the content of the integrated value S is S1≦S<S2, the process proceeds to step 73 and the temperature of the inner pot is 110.
Determine whether the temperature is below ℃. The temperature of the inner pot
If the rice is not below 110°C, as described above, the high temperature immediately after cooking is still persisting, so the rice cooking heater is turned off in step 74, the warming heater is turned off in the next step 75, and the process returns to step 64. The process continues from determining whether the remaining irregularity time is "0". On the other hand, if it is determined in step 73 that the temperature of the inner pot is 110°C or lower, step 76 is performed to perform uneven heating control.
In step 77, the rice cooking heater is turned on at 2/14, and in the next step 77, heating power control is performed to turn on the warming heater at 12/14. Then go back to step 64 and
The process continues from determining whether the remaining irregularity time is "0".

Similarly, in the judgments of steps 65 and 66, if the content of the integrated value S is S2<S, the process proceeds to step 78, and in this case, it is determined whether the temperature of the inner pot is 108°C or less. Determine. If the temperature of the inner pot is not below 108℃, as above,
Since the high temperature immediately after cooking is still maintained, the rice cooking heater is turned off in step 79, the warming heater is turned off in step 80, and the process returns to step 64 to check whether the remaining uneven time is "0" or not. Processing continues from that determination. If it is determined in step 78 that the temperature of the inner pot is 108°C or lower, the process proceeds to step 81, where the rice cooking heater is turned on at 2/14 to perform uneven heating control, and the process proceeds to the next step. At 82, the heating power control is performed to turn on the heat retention heater at 12/14. Then, the process returns to step 64 and continues the process from determining whether the remaining unevenness time is "0".

In this way, steps 65 to 82 are performed, and the varnishing process is continuously performed for a predetermined time by changing the varnishing temperature according to the determined rice cooking capacity value (time integrated value S).

If it is determined in step 64 whether the remaining unevenness time is "0", the process proceeds to step 83 to complete the control of the unevenness process. First, in step 83, the rice cooking heater is turned off, and in the next step 84, the warming heater is turned off. Next, in step 85, the character display of the display unit shows
Turn off the uneven display. Then, in step 86, a buzzer is sounded to notify the end of unevenness. Since this buzzer notification is performed eight times, it is then determined in step 87 whether or not the buzzer notification has been completed eight times. Until the end of the 8th inning can be determined,
Return to step 86 and repeat the buzzer notification.

When the eight buzzer notifications have been completed, this is determined in step 87, and the process proceeds to step 88 to start cooking rice.
The LED (light emitting diode) is turned off, and then, in step 89, the menu display is further turned off to complete the control of the unevenness process. After the unevenness process is completed, a heat retention process is performed to maintain the temperature at a predetermined temperature.

In this way, in the rice cooking control of the unevenness process, the value of the integrated time value S corresponding to the rice cooking capacity determined in the previous process of cooking is held. Using this retained accumulated time value S, rice cooking heating control including a part of additional cooking during the uneven time is performed. The uneven temperature, which is controlled according to the cumulative time value S corresponding to the rice cooking capacity, is set to 112°C, which is higher than the standard temperature of 110°C, when the rice cooking capacity is large.
If the rice cooking capacity is small, set the temperature to 108℃, which is lower than the standard temperature of 110℃.

Thereby, even if uneven cooking occurs when cooking rice with a large rice capacity, uneven cooking can be prevented by setting the uneven cooking temperature to a high temperature.

In this way, rice can be cooked by appropriate rice cooking control in the steaming process performed according to the rice cooking capacity.

Although the present invention has been specifically described above based on Examples, it goes without saying that the present invention is not limited to the above-mentioned Examples, and can be modified in various ways without departing from the gist thereof.

〔Effect of the invention〕

As explained above, in the rice cooking jar of the present invention, uneven process control including additional cooking is performed according to the rice cooking capacity determined in the cooking process, so that there is no uneven cooking and the rice is cooked deliciously. You can get a rice cooker.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a rice cooker according to an embodiment of the present invention, FIG. 2 is a front view showing the panel surface of a function selection operation unit, and FIG. 3 is a main part of a control unit using a microcomputer. Fig. 4 is a flowchart showing the outline of the overall control flow of the microcomputer, and Fig. 5 shows the flowchart of the inner pot when the rice cooking process is controlled by the microcomputer. FIGS. 6a and 6b, which are diagrams showing examples of rice cooking temperature curves showing temperature changes, show a cooking process including a rice cooking capacity determination process performed by a microcomputer of a control unit, a boiling maintenance process, and an uneven cooking process including additional cooking. 3 is a flowchart showing a processing flow of control operations. In the diagram, 1... rice cooker body, 2... lid, 3...
Main body, 4... Inner pot, 4a... Pot lid, 5... Inner pot storage container, 6... Rice cooking heater, 7... Shoulder ring,
8... Shoulder heater, 9... Heat retention heater, 10... Control unit, 11... Function display selection operation unit, 12... Character display, 13... Operation key switch, 14... Status display section, 15... Commercial AC power supply, 16...Temperature fuse, 17...Relay, 1
8, 19a, 19b...triack, 20...
Microcomputer, 21...Clock mechanism, 22
... Buzzer, 25 ... Temperature sensor (lid sensor),
29...Temperature sensor (bottom sensor).

Claims (1)

[Claims] 1. A temperature sensor provided near the bottom of the inner pot, a rice cooking heater provided at the bottom of the inner pot, a heat retention heater provided in the body of the inner pot, and a temperature detection signal from the temperature sensor to control each heater. A rice-cooking heat-retaining jar having a control means for controlling the energization of the rice, controlling the rice-cooking process including determining the rice-cooking capacity, controlling the unevenness process following the rice-cooking process, and controlling the rice-cooking process.
A rice cooking jar characterized by holding rice cooking capacity data determined in a cooking process and controlling a steaming temperature according to the rice cooking capacity data held in a steaming process control. 2. The uneven temperature controlled by the control means according to the rice cooking capacity data held in uneven process control is set to a temperature higher than the standard temperature when the rice cooking capacity is large, and a temperature lower than the standard temperature when the rice cooking capacity is small. The rice cooking jar according to claim 1, characterized in that: