JPS6088516A - Rice cooker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a rice cooker that automatically performs a water absorption heating process and a rice cooking heating process.

[Prior art]

Generally, in order to cook delicious rice, it is necessary to carry out a water absorption heating process in which the rice absorbs an appropriate amount of water after washing, and a rice cooking and heating process in which the rice is heated in an appropriate amount.

However, conventional rice cookers with this glaze always start from the water absorption and heating process when the power is turned on. Therefore, in the case of a power outage during the rice cooking and heating process, there is a drawback that even after the power is restored, the rice cooking time is increased because the water absorption and heating process is restarted.

[Summary of the Invention] This invention was made in view of the above points, and when the power is turned on, the temperature of the inner pot is detected, and if the temperature is less than a predetermined value, the water absorption and heating process is started, and if the temperature is higher than the predetermined value, the temperature is started. This method solves the above-mentioned conventional inconvenience by starting from the rice cooking and heating process.

[Embodiments of the invention]

An embodiment of the present invention will be described below. FIG. 1 is an overall configuration diagram of an embodiment of a rice cooker according to the present invention.

As is clear from FIG. 1, the rice cooker according to the embodiment of the present invention is provided with a heating element 2 that heats the inner pot 1 from the bottom and a temperature detector 3 that detects the bottom temperature of the inner pot 1, and when the power is turned on. Should the water absorption heating process be executed by the heating process selection means 4 by inputting the detection signal of the temperature detector 3 immediately after that?

It is determined whether to perform the rice cooking heating process, and in the case of the water absorption heating process, the heating body 2 is controlled by the water absorption heating control means 5, and in the case of the rice cooking heating process, the heating body 2 is controlled by the rice cooking heating control means 6. It is configured like this.

FIG. 2 is a circuit diagram showing the electrical connections of the embodiment of FIG. 1. In FIG. 2, 13 is an A/D converter 14. memory 1
5, a CPU 6, an input circuit 17, and an output circuit 18;

21 is an A/
It is an input terminal of the D converter 14, and is connected to the voltage dividing resistor circuit 19.
A/
The signal is input to the D converter 14.

The water absorption heating control means 5 and the rice cooking heating control means 6 are controlled by the microcomputer 13. Resistor 22° Transistor 23
．． Resistance 24. Bidirectional thyristor 111. It is composed of a heating body 2. 25 is a music frequency power supply.

Next, the operation of the above embodiment will be explained with reference to FIG.

FIG. 6 is a flowchart showing the water absorption/rice cooking selection program stored in the memory 15 of the microcomputer 13. First, in step 26, when the power is turned on,
In step 27.

A comparison is made between the bottom temperature T of the inner pot 1 and a predetermined value. The bottom temperature T of the inner pot 1 is detected by a temperature detector 3. A voltage dividing resistor circuit 19 consisting of a resistor 20 is connected to an input terminal 21 of the microcomputer 13. Input circuit 17 via A/D converter 14
input and measured. At this time, if the bottom temperature T of the inner pot 1 is T<T, the water absorption heating step 28 is executed.

This water absorption heating step 28 is performed at a predetermined temperature T19, for example, 50υ
This is a step of preheating the rice to a temperature of for a predetermined period of time, for example, 17 minutes, to allow the rice to absorb water. In this step,
The temperature of the inner pot 1 detected by the temperature detector 3 is input to the input circuit 11.
is input to the transistor 23 via the output circuit 18.
N, the bidirectional thyristor 11 is turned on, the inner pot 1 is heated to a temperature of 50°C by the heating element 2, and this state is 17
held for minutes.

When the water absorption heating step 28 is completed, the rice cooking and heating step 29 starts, and the rice in the inner pot 1 is cooked by the heating element 2. That is, the temperature detector 3 detects a predetermined rice cooking completion temperature (for example, 12
The output of the output circuit 18 is continuously high until it becomes 0υ).
gh, transistor 23. Bidirectional thyristor 24
ONL, the inner pot 1 is heated by the heating element 2.

When the rice cooking heating process 29 is completed, the heat retention heating process 30 begins. The heat retention heating step 30 is a step in which the temperature of the cooked rice in the inner pot 1 is maintained at a constant value xPfi constant value T2 (for example, 70° C.).

On the other hand, when the power is turned on, the temperature T of the inner pot 1 is T≧T.

In this case, the staple 27 is removed, the water absorption and heating step 28 is omitted, and the rice cooking and heating step 29 is executed.

In this way, when the power is turned on, the temperature T of the inner pot 1 is detected and compared with the predetermined value T, and it is possible to select whether to start from the water absorption heating process 28 or the rice cooking heating process 29.

Even if the stain source is turned off due to a power outage or the like during the rice cooking and heating process 29, when the power is turned on again, the rice cooking and heating process 29 will be executed without the water absorption heating process 28, so the rice cooking time will be longer. There is nothing like that.

(Other Application Examples) Although the above embodiment is a rice cooker in which the heating element 2 is powered by electrical energy, it is possible to replace the heating element 2 with another energy source such as gas. For example, In a rice cooker that uses gas as an energy source, the heating element 2 is replaced with a burner, and the bidirectional cylinder 11 is replaced with a valve that adjusts the amount of gas. [Effects of the Invention] As described above, according to the present invention, water absorption heating A rice cooker that automatically performs the heating process is equipped with a heating process selection means that selects the appropriate heating process according to the temperature of the inner pot when the power is turned on, so that the rice absorbs water properly or is heated during the cooking process. It is possible to prevent the rice cooking time from increasing after the power is restored due to a power outage or the like.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an embodiment of a rice cooker according to the present invention, FIG. 2 is a circuit diagram showing its electrical connections, and FIG. 3 is a flowchart showing the operation of this embodiment. In the figure, 1 is an inner pot, 2 is a heating element, 3 is a temperature detector, 4 is a heating process selection means, 5 is a water absorption heating control means, 6 is a rice cooking heating control means, and 13 is a microcomputer. Agent Masuo Oiwa (2 others) -'Heto1 Figure

Claims (1)

[Claims] (1) A heating body that heats the inner pot from the bottom by IJD, a vorticity detector that detects the temperature of the inner pot, a water absorption heating control means that controls the heating body based on a detection signal from the temperature detector, and rice cooking heating control. In the rice cooker, the temperature of the inner pot when the power is turned on is detected by the temperature detector, and if the temperature is lower than a predetermined value, the rice cooker starts from a water absorption heating step in which the rice absorbs an appropriate amount of moisture. (2) A rice cooker characterized in that the heating process selection means is provided with a heating process selection means for selecting a heating process so as to perform a rice cooking heating process that provides an appropriate amount of heating when the rice cooking amount is equal to or higher than a predetermined value. The rice cooker according to claim 11, which is realized by a computer.