JPH0380814A - Rice cooker - Google Patents

Abstract

PURPOSE:To always cook delicious rice by providing a control means for deciding the rice cooking quantity in accordance with the degree in which an inclination correcting means for correcting the temperature raising rate of a pot controls a heating means, and executing rice cooking, while controlling the heating means, based on this decision value. CONSTITUTION:When a rice cooking switch 2 starts rice cooking, a temperature sensor 3 detects the temperature of a pot. In a precooking means 4, a heating means 1 is energized by the rice cooking switch 2, a temperature in the pot is kept constant and rice is allowed to absorb water, and in an energizing means 5, the heating means 1 is continuously energized for a prescribed time by the signal of the precooking means 4. An inclination correcting means 6 detects the temperature raising rate of the temperature sensor 3, and corrects the temperature raising rate by bringing the energizing rate of the heating means 1 to correction control so that the temperature raising rate becomes a prescribed value being optimum for rice cooking. A control means 7 decides the rice cooking quantity in accordance with the degree in which the heating means 1 is controlled by a signal from the inclination correcting means 6, and based on its decision value, cooking and steaming are executed and rice cooking is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rice cooker for general household use.

Conventional technology Regarding the conventional rice cooker of this type, Japanese Patent Application Laid-Open No. 60-4f9
As shown in Publication No. 09, after the pre-cooking process [ is completed, the rice is cooked by continuously operating the heater in the breaking-in process ■ and the determination process ■, the amount of rice to be cooked is determined, and the rice is cooked in the subsequent rice cooking process. (2) In the cooking process V, the heater was controlled according to the amount of rice cooked.

Problems to be Solved by the Invention However, in such conventional rice cookers, the heater is controlled in the rice cooking process (■) and the cooking process (V) based on the rice cooking amount determination, so that the temperature rise detected by the temperature sensor is optimized. However, since the heater is operated continuously in the break-in process (■) and the judgment process (m), the temperature detected by the thermosensor 11 will be more sensitive if the amount of rice cooked is small, and the difference will be less if the amount of cooked rice is large. Therefore, there was a problem that the temperature rise detected by the thermosensor could not be optimized during the break-in process (■) and the judgment process (■), and therefore delicious rice could not be cooked.

The present invention is intended to solve these problems, and aims to control the heating means so that the temperature rise in the pot is optimal regardless of the amount of rice being cooked, and to cook delicious goita. It is something to do.

Means for Solving the Problems In order to achieve the above objects, the rice cooker of the present invention includes a rice cooking switch for starting rice cooking, a heating means for heating a pot, a temperature sensor for detecting the temperature of the pot, and this temperature sensor. a slope correction means for detecting a temperature rise rate and correcting the temperature rise rate by controlling the heating means so that the temperature rise rate is constant; and a slope correction means for correcting the temperature rise rate by controlling the temperature rise rate to be constant; and a control means for making a determination and cooking rice while controlling the heating means based on the determined value.

Function According to the above configuration, rice can be cooked by controlling the heating means so that the temperature rise in the pot is optimal regardless of the amount of rice being cooked, so delicious rice can be cooked regardless of the amount of rice being cooked. be able to.

In the rice cooking process, the amount of cooked rice can be determined by measuring the degree to which the heating means is energized to optimize the temperature rise, and this can be used to control the output of the heating means during boiling. Therefore, the optimum heating for rice cooking can be performed throughout the rice cooking process from the start of rice cooking, regardless of the amount of rice being cooked, so that delicious rice can be cooked at any time.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

Figure 1 shows a block diagram of a rice cooker according to an embodiment of the present invention, in which 1 is a heating means such as a heater that heats the pot, 2 is a rice cooking switch that starts cooking rice, and 3 is the temperature of the pot. 4 is a pre-cooking means that energizes the heating means 1 using the rice cooking switch 2 to keep the temperature in the pot constant and water is absorbed into the rice; 5 is a pre-cooking means for heating the rice for a certain period of time according to a signal from the pre-cooking means 4; The energizing means 6 continuously energizes the means 1, and the energizing means 6 detects the temperature rise rate of the temperature sensor 3, corrects and controls the energization rate of the heating means 1 so that the temperature rise rate becomes a predetermined value optimal for rice cooking, and adjusts the temperature rise rate. The item to be corrected is the correction means, and γ is a control that determines the amount of cooked rice based on the degree to which the heating means 1 is controlled by a signal from the trouble correction means 6, and cooks the rice unevenly based on the determined value. It is a means.

FIG. 2 shows a circuit diagram of a rice cooker according to an embodiment of the present invention, which is composed of a microcomputer 8 and peripheral circuits. The microcomputer 8 shown here includes a CPU and a ROM.

It is a so-called one-chip microcomputer consisting of RAMb, input/output ports, etc. 9 is a temperature sensing element, and this temperature sensing element 9 is connected to an input port of the microcomputer 8 via an A/D converter 10. This is #)
The temperature signal from the temperature sensing element 9 is converted into a binary code and read into the microcomputer 8. 11 is a rice cooking switch, 12 is a cancel switch, and a microcomputer 8 is used to determine whether or not these are pressed.
has been entered. 13 is an AC power supply, and this AC power supply 1
3 is connected to a series circuit of a heater 14 that heats the pot and a relay contact 15, and a signal from the output port of the microcomputer 8 causes a current to flow through the relay coil/l/17 through the transistor 16, thereby turning on the relay contact 15. It is configured to open and close. 18 is a DC power supply for operating the circuit described above.

Next, the operation of the rice cooker configured as above will be explained. FIG. 3 shows a flowchart of a program stored in the ROM in the microcomputer 8, and the operation of the program shown in this flowchart will be explained using FIG. 4 as well.

In step 1, it is determined whether or not the rice cooking switch 11 has been pressed, and the determination is repeated depending on whether or not the rice cooking switch 11 has been pressed, and if the rice cooking switch 11 has been pressed, the process proceeds to step 2. In step 2, the pre-cooking mode is entered and the heater 14 is controlled over a certain period of time so that the temperature detected by the temperature sensing element 9 becomes T. This process is a pre-cooking process.

When the pre-cooking process is completed, proceed to step 3 and turn on heater 1.
Turn on the power to 4, continue waiting until it exceeds 1 minute in step 4,
If the number of minutes is exceeded, proceed to step 5.

In step 5, increase by 2 degrees! Wait there, 2de
When g increases, step 6 increases by 2 deg but 1
It is determined whether 5 seconds have been required, and if it is 15 seconds or more, the heater 14 is turned on in step 7 and the process proceeds to step 8. If it is less than 15 seconds in step 6, change the heater 14 to be energized for 8 seconds out of 16 seconds in step 9, and step 8
Proceed to. In step 8, wait at 1 where it increases by 2 degrees again, and when it increases by 2 degrees, proceed to step 10-・2
Determine whether it took 16 seconds or more to increase the degree. If it is 16 seconds or more, proceed to step 11 and turn the heater 14 on.
Increase the energization rate by 1 second. However, if the energization exceeds 16 seconds, the time shall be 16 seconds. Then proceed to step 12.

If it takes less than 15 seconds to increase by 2 degrees in step 1o, it is determined in step 13 whether it takes less than 13 seconds to increase by 2 degrees, and if it is more than 13 seconds, proceed to step 12; If so, proceed to step 14. In the stethoscope 14, the energization rate of the heater 14 is reduced by 1 second.

However, if the current is energized for less than 2 seconds, set it to 2 seconds. Then, the process proceeds to step 12, where the total energization time of the heater 14 is
Count N and proceed to step 15. It is determined whether or not the temperature detected by the temperature sensing element 9 has reached T2 (approximately 95° C.) using the stethoscope 15. If T2 has not been reached, the process returns to step 8, and when T2 has been reached, the process proceeds to step 16. This process is a rice cooking process.

The stesoge 16 enters a cooking mode and determines the amount of cooked rice based on the total energization time TON in the rice cooking process. If the amount of rice cooked is small, TON will be short, and if the amount of rice cooked is large, TON will be long. Based on the determined amount of rice cooked, the energization rate of the heater 14 is determined and energized.Then, the process proceeds to the stesoge 17, where it is heated in the casing where the water in the pot runs out. Next, when the water runs out, the temperature sensing element 9 rises rapidly, and it is determined whether the temperature has reached a predetermined temperature (approximately 136°C). When the temperature reaches the predetermined temperature, step 18
Proceed to. This process is a cooking process.

In step 18, enter the uneven mode, and in step 19
Then, it is determined whether or not 16 minutes have passed since entering the irregular mode, and the rice cooking is completed. When the rice cooking is completed, in step 2o it enters a heat keeping mode to keep the cooked rice warm, and the stem 21 determines whether the cancel switch 12 has been pressed, and if the cancel switch 12 has not been pressed, returns to step 2o and cancels. If the switch 12 is pressed, the process returns to step 1.

In this way, according to an embodiment of the present invention, regardless of the amount of rice to be cooked, the temperature rise in the pot can be made to pass on the optimal predetermined curve, and the rice can be cooked, regardless of the amount of rice to be cooked. You can cook delicious rice.

By keeping the temperature rise in the pot constant throughout the entire rice cooking process, starting immediately after the pre-cooking process, you can achieve the optimal rice cooking pattern and cook delicious rice.

Next, by applying electricity for a certain period of time immediately after the pre-cooking process, the temperature of the temperature sensing element 9, which was in equilibrium during the pre-cooking process, is changed to an increasing curve, and the rate of temperature increase can be accurately detected.

Furthermore, when performing the first crest correction - the buttocks are halfway. By setting the energization rate to , it is possible to cause a step-like change and quickly correct the temperature rise rate to a predetermined temperature rise rate.

By measuring the amount of time the heater 14 is energized during the rice cooking process, the amount of rice to be cooked can be determined, and using this information, the temperature rise in the pot during the rice cooking process can be controlled to be optimal. , regardless of the amount of rice cooked.
You will be able to cook fresh rice.

Here, the amount of rice cooked is determined based on the total energization time, which is determined and controlled by the inclination correction means, but the amount of rice cooked may also be determined based on the energization rate in the latter half, and the inclination correction means controls the heater 14. The amount of cooked rice can be determined based on the degree of cooking.

Effects of the Invention As is clear from the description of the above embodiments, according to the present invention,
Regardless of the amount of rice cooked, it is now possible to control the heating means for the entire rice cooking process so that the temperature rise in the pot is optimal, making it possible to cook delicious rice regardless of the amount of rice cooked. It becomes like this.

7. In the rice cooking process, the amount of rice to be cooked can be determined by measuring the degree to which the heating means is energized to optimize the temperature rise, and this can be used to control the output of the heating means during boiling. Therefore, the optimum heating for rice cooking can be performed throughout the entire rice cooking process from the start of rice cooking, regardless of the amount of rice being cooked, so delicious rice can be cooked at any time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a rice cooker showing an embodiment of the present invention;
Fig. 2 is a circuit diagram of the rice cooker, Fig. 3 is a flowchart showing an example of a program of the rice cooker, and Fig. 4 is a temperature characteristic diagram within the pot. j... Heating means, 2... Rice cooking switch, 3... Temperature sensor, 4... Pre-cooking means, 6... Trouble Correction means, 7... Control means.

Claims (1)

[Claims] A rice cooking switch that starts cooking rice, a heating means that heats a pot, a temperature sensor that detects the temperature of the pot, and a temperature rise rate of this temperature sensor is detected and the heating means is controlled so that the temperature rise rate is constant. an inclination correction means for correcting the rate of temperature increase; and a control means for determining the amount of cooked rice based on the degree to which the heating means is controlled by the inclination correction means, and cooking rice while controlling the heating means based on this determination value. A rice cooker equipped with.