JPS63167749A - Rice cooking process - Google Patents

Abstract

PURPOSE:To prepare uniformly cooked rice, by estimating the quantity of rice when the temperature of the rice reaches a level lower than boiling point, continuing the supply of a prescribed high electrical power according to the estimated quantity of rice and continuing the cooking process under decreased electrical power supply. CONSTITUTION:In the cooking of rice by supplying electrical power to rice- cooking heater, a prescribed high electrical power is supplied to the heater and the quantity of the rice is estimated when the temperature of the rice reaches a level lower than the boiling point. After the estimation of the quantity, the above prescribed high electrical power supply is continued for a period corresponding to the quantity of the rice and, thereafter, the electrical power supply to the cooking heater is decreased and the cooking is continued. A uniformly cooked delicious rice can be prepared because the estimation of the rice quantity is carried out in the course of cooking without decreasing the electrical power for cooking and the rice is boiled at a stroke without decreasing the electrical power supply after the estimation of the rice quantity.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a rice cooking method, and more specifically, to a rice cooking method that allows delicious rice to be cooked regardless of the amount of rice cooked.

<Conventional technology> In order to cook delicious rice, after letting the rice absorb enough water,
- It is said that it is necessary to bring the rice to a boil, and after boiling, maintain the boiling state by adjusting the heat according to the amount of rice cooked.

From this point of view, we adopted a configuration that incorporates a microcomputer to control the power supplied to the rice cooking heater.
At the beginning of the cooking process, the amount of cooked rice is determined by detecting changes in the temperature of the inner pot containing rice and water,
After determining the amount of rice to be cooked, a rice cooker is provided in which the rice cooking process is performed by supplying electric power corresponding to the amount of rice to the rice cooking heater.

Specifically, as shown in FIG. 7, after raising the temperature to a first predetermined temperature, the power to the rice cooking heater is cut off, and the time required for the temperature to drop to a second predetermined temperature is measured. The amount of rice to be cooked is determined, or the rice cooking process is performed by continuing to supply a predetermined power to the rice cooking heater, and the time required for the temperature to rise from the first predetermined temperature to the second predetermined temperature in the middle of the cooking process. The amount of cooked rice is determined by measuring.

Then, the power to be supplied to the rice-cooking heater is set based on the determined amount of rice to be cooked, and thereafter the rice can be cooked by continuing the cooking process by supplying the set power to the rice-cooking heater.

<Problems to be Solved by the Invention> In the above rice cooking method, the amount of cooked rice is determined based on temperature changes, so at the time the amount of cooked rice is determined, the amount of rice cooked is lower than the boiling state. This temperature is quite low, and since the power supplied to the rice cooking heater is changed around this temperature as a boundary, the rate of temperature rise from when the amount of rice to be cooked until the boiling state is determined is the amount of rice to be cooked. There will be a corresponding change (see Figure 6).

As a result, the gelatinization speed on the outside and inside of the rice changes, resulting in uneven cooking or insufficient gelatinization.
There is a problem that the rice cannot be cooked very deliciously.

<Object of the invention> This invention was made in view of the above problems,
To provide a rice cooking method capable of determining the amount of rice to be cooked and also capable of cooking delicious rice without uneven cooking regardless of the amount of rice to be cooked.

Means for Solving the Problems〉 To achieve the above object, the rice cooking method of the present invention is as follows:
While continuing to supply a predetermined high power to the rice cooking heater, the amount of rice to be cooked is determined when the temperature reaches a temperature lower than the boiling point, and after determining the amount of rice to be cooked, the predetermined high power is supplied in accordance with the amount of rice to be cooked. This state is continued, and then the power supplied to the rice cooking heater is reduced to continue the rice cooking process.

However, a predetermined high power supply duration time may be set in accordance with the amount of rice to be cooked, or a predetermined high power supply may be continued until the temperature is raised to a predetermined temperature close to the boiling point. good.

Effects> According to the rice cooking method described above, the amount of cooked rice can be determined when the temperature reaches a temperature lower than the boiling point while a predetermined large amount of power is continuously supplied to the rice cooking heater. After determining the amount of rice to be cooked, the predetermined high power supply state is continued in accordance with the amount of rice to be cooked, so the rice can be boiled at once regardless of the amount of rice to be cooked, and then the power supplied to the rice heater is reduced. By doing so, it is possible to supply the amount of heat corresponding to the amount of rice to be cooked, maintain the boiling state, and continue the cooking process.

By setting a predetermined high power supply duration time corresponding to the amount of rice to be cooked, even if the rice is brought to a boil all at once, the predetermined high power supply will continue until the rice reaches a predetermined temperature close to the boiling point. By doing so, the same effect as above can be achieved even when the rice is boiled all at once.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

Figure 4 is a partially cutaway side view of the rice cooker, and shows the main body of the rice cooker (
The inner pot (2) is removably housed in the inner pot storage container (G) attached to the interior of (1). A rice cooking heater (4) is attached so as to be in contact with the lower surface of the inner pot (2), and a temperature sensor (4) for detecting the temperature is attached on the lower or side surface of the inner pot (2). Note that (2) is a control unit mainly composed of a microcomputer, and (7) is a rice cooking switch.

The control unit ■ inputs the signal obtained by the rice cooking switch (7) and the temperature detection signal obtained by the temperature sensor ■ into digital data, identifies the state of the rice cooker, and responds to the identified state. By outputting a control signal and controlling the conduction angle of the heater control circuit, the power supplied to the rice cooking heater (4) can be controlled to the optimum power.

FIG. 1 is a flowchart illustrating the operation of the rice cooker with the above configuration, and the rice cooking operation is performed by energizing the rice cooking heater (4) on the condition that the rice cooking switch (7') is turned on. let

That is, when electricity is first started to be supplied to the rice cooking heater (4), the water absorption process is carried out by controlling the supplied power to a relatively small predetermined power (see step Let it absorb water. After the water absorption step is carried out for a predetermined period of time or until the temperature is raised to a predetermined temperature, the rice cooking heater (4) is energized at full power in step (3) to carry out the cooking step. In the middle of this cooking process, after waiting until the temperature rises to the first predetermined temperature T1°C as shown in step
In step ■, start the timer operation,
Next, in step (2), the second predetermined temperature T2°C (
After waiting until the temperature rises to T2 > Tl), step ■
The timer operation is stopped at .

After that, in step ■■■, the above-mentioned time t is
Ilt≦t2, t2<t≦t3, ta
It is determined whether <t5t4 or t4<t. If it is determined that tl<t≦t2, the process waits until the predetermined time ta has elapsed in step (2), and then energizes the rice cooking heater with 9/14 of the full power in step [Yes]. Further, if it is determined that t2<t≦t3, the process waits until the predetermined time tb has elapsed in step (2), and then performs the process of step [Yes], and it is determined that ta<t≦t4. in case of,
After waiting until the predetermined time tC has elapsed in step @, the process in step [Yes] is performed, and if it is determined that t4<t, then in step @ the predetermined time td
After waiting until the time period elapses, the process of step [Yes] is performed. Note that the above waiting time is ta < tb < tQ < t
d, and is set so that it can be brought to a boiling state by energizing the rice cooking heater (4) at full power for each of the predetermined times.

After energizing the rice cooking heater ■ with a power of 9/14 in the above step [Yes], wait until the rice is cooked (until the detected temperature reaches a predetermined temperature higher than the boiling point) in Step ■. , the unevenness process is performed in step (2).

To summarize the above, as shown in Figure 2, by measuring the time required for the temperature to rise while the rice cooking heater (4) is energized at full power at a relatively early stage of the cooking process, The amount of cooked rice can be determined. Since full power is continued to be applied to the rice cooking heater (4) even after determining the amount of rice to be cooked, the rice can be cooked all at once with high power both before and after determining the amount of rice to be cooked.

In this case, the full power energization time is set to be shorter if the amount of rice cooked is small, and longer if the amount of rice to be cooked is large, so the boiling state will occur when the full power energization ends, and after that, The boiling state can be maintained by applying electricity at a power of 9/14. Then, when the moisture has disappeared and the temperature has reached a predetermined temperature higher than the boiling point, the power to the rice cooking heater (4) is cut off to perform the steaming process, and delicious rice can be cooked.

That is, during the cooking process, the rice cooking power is maintained at full power until the boiling point is reached, making it possible to cook delicious rice that is fluffy and evenly cooked.

In addition, in the above embodiment, the duration of full power energization after determining the amount of rice to be cooked is changed in accordance with the amount of rice to be cooked; Delicious rice can be cooked in the same way even if the rice is turned on with power.

FIG. 3 is a flowchart showing another embodiment;
The difference from the flowchart in the figure is that regardless of the amount of rice cooked,
Instead of energizing at a power of /14, the optimum power is set according to the amount of rice to be cooked, and the rice cooking heater (4) is energized based on the set power, and a heat retention heater (not shown) is used. The only difference is that the power supplied to the rice cooker is also set in accordance with the amount of rice cooked, and the other parts are the same.

Therefore, in the case of this embodiment, the amount of heat required to maintain the boiling state can be set to the optimum value depending on the amount of rice to be cooked, and even more delicious rice can be cooked.

Regarding the temperature detection mentioned above, as shown in Fig. 5,
A temperature sensing element (14) is provided at the tip of a one-touch pin (13) for removably attaching the inner lid (12) to the outer lid (11), and the temperature sensing element (14) is attached by the cover member (15). 14) and surrounding the temperature sensing element (14).
Alternatively, the temperature may be detected indirectly.

Note that (1B) is a lead wire, and (17) is a backing.

Furthermore, in the above embodiment, the amount of rice to be cooked is determined without cutting off electricity to the rice heater during cooking, but as shown in FIG. The amount of rice to be cooked may be determined based on the decrease in the detected temperature by cutting off the electricity supply to the rice cooker.

<Effects of the Invention> As described in Part 2, this invention determines the amount of rice to be cooked without reducing the rice cooking power during the cooking process, and also does not reduce the rice cooking power even after determining the amount of rice to be cooked. Since the rice is brought to a boil all at once, it has the unique effect of allowing delicious rice to be cooked evenly.

[Brief explanation of the drawing]

Fig. 1 is a flowchart showing one embodiment of the present invention, Fig. 2 is a chart showing changes in detected temperature as the rice cooking operation is performed, Fig. 3 is a flowchart showing another embodiment, and Fig. 4 is a flowchart showing the rice cooking operation. Fig. 5 is a vertical cross-sectional view showing the configuration of a one-touch bin equipped with a temperature sensing element; Fig. 6 shows the change in detected temperature as the rice cooking operation is performed based on another embodiment. FIG. 7 is a diagram showing changes in detected temperature when a rice cooking operation is performed using a conventional method. Time Figure 4 Figure 5

Claims (1)

[Claims] 1. When performing a cooking operation by supplying electric power to a rice-cooking heater, when a predetermined large amount of electric power is continuously supplied to the rice-cooking heater, the temperature is lower than the boiling point. When the amount of rice is reached, the amount of rice to be cooked is determined, and after the amount of rice to be cooked is determined, the predetermined high power supply state is continued in accordance with the amount of rice to be cooked, and then the cooking process is continued by reducing the power supplied to the rice cooking heater. A rice cooking method characterized by: 2. The rice cooking method according to claim 1, wherein a predetermined duration of large power supply is set in accordance with the amount of rice to be cooked. 3. The rice cooking method according to claim 1, wherein a predetermined high power supply is continued until the temperature is raised to a predetermined temperature close to the boiling point.