JPS5940816A - 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] It is.

Conventional Structure and Problems Conventionally, this type of rice cooker has a rice cooking heater 2 and a bidirectional thyristor 3 connected in series to a commercial power source 1, as shown in FIG. When the rice cooking control circuit 6 opens, the rice cooking control circuit 6 detects this and turns off the bidirectional thyristor 3. After a certain period of time, the rice cooking control circuit 5 turns on the bidirectional thyristor 3 again for a certain period of time, and Do the cooking. Thereafter, the temperature sensing element 6 detects the plate temperature and controls the bidirectional thyristor 8 via the heat retention control circuit 7 to activate the heat retention heater 9. Lid heater 10. The rice cooking heater 2 is energized and controlled,
The rice was kept at a constant temperature. However, since re-cooking is performed only by the rice heater 2, the power consumption is too high, and it is necessary to energize the rice cooker 2 for 1 to 2 minutes to prevent the rice from burning. 0 Purpose of the Invention The present invention aims to eliminate the above-mentioned conventional drawbacks and to provide an additional cooking effect to the entire rice.

Structure of the Invention The present invention connects a heat-retaining heater and a thyristor in parallel to a rice-cooking switch that controls energization of the rice-cooking heater, and connects the thyristor with a control circuit that supplies a signal to turn on the thyristor for a predetermined period of time after the rice-cooking switch is opened. By connecting to the gate electrode, additional cooking is performed using the rice cooking heater and the heat retention heater, thereby exerting an additional cooking effect on the upper part of the plate.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIG.

In Fig. 2, 11 is a commercial power supply, and the rice cooking heater 1
2 and a series circuit of the rice cooking switch 13 are connected. This rice cooking switch 13 has a heat retention heater 14 and a lid heater 16.
A series circuit of a bidirectional thyristor 16 and a bidirectional thyristor 16 are connected in parallel. Note that the rice cooking heater 12 is provided at the bottom of the main body, the warming heater 14 is provided at the side of the main body, and the lid heater 16 is provided at the bottom surface of the lid. 17 is a bidirectional thyristor 16
This control circuit is connected to the gate pole of the bidirectional thyristor 16 and supplies a signal to turn on the bidirectional thyristor 16 for a predetermined period of time after the rice cooking switch 13 is opened. be. Reference numeral 18 denotes a temperature sensing element that detects the temperature of the plate and supplies temperature information to the control circuit 17.

In the above configuration, when cooking rice, the rice is heated only by the rice cooking heater 12, and when the rice is cooked, the rice cooking switch 13 is opened, and the rice cooking heater 12. When the heat retention heater and the lid heater 15 are not connected in series, the control circuit 17 turns on the bidirectional thyristor 16 for a predetermined time after the rice cooking switch 13 is opened, so that the rice cooking heater 12. Heat retention heater 14
．． Since the three heaters of the lid heater 16 re-cook the rice from the top and bottom sides, the re-cooking effect can be exerted on the entire rice. Thereafter, the control circuit 17 receives temperature information from the temperature sensing element 18 and controls the bidirectional thyristor 16 on and off to maintain the rice at a constant temperature.

Effects of the Invention As is clear from the above embodiments, according to the present invention, additional cooking is performed not only by the rice cooking heater but also by the warming heater and the rice cooking heater, so that the additional cooking effect can be exerted on the entire rice.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram of a conventional rice cooker, and Fig. 2 is an electric circuit diagram of a rice cooker showing an embodiment of the present invention.・Rice-cooking heater, 13...Rice-cooking switch, 14.Old...Warmth heater, 16...Bi-directional thyristor, 17.
...Control circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A rice cooking heater is connected to a power source through a rice cooking switch that opens when rice is cooked, a series circuit of a heat retention heater and a thyristor is connected in parallel to the rice cooking switch, and the rice cooking switch is opened to the gate of the thyristor. A rice cooker that is connected to a control circuit that supplies a signal that turns on a thyristor for a predetermined period of time after a certain period of time has elapsed.