PURPOSE:To automatically return to a former rice boiling circuit or heat reserving circuit at the time of an service interruption return even when the service interruption, etc., are generated in the middle of a rice boiling or heat reserving by providing the rice boiling circuit, the heat reserving circuit, a storing means to store signals different in the case of a rice boiling action and a heat reserving action, etc. CONSTITUTION:When a rice boiling switch 17 is turned on, a thyristor 14 is turned on, a charge to a capacitor 15 of a charging circuit 16 is executed, a signal potential at a B point is made higher than the signal potential at an A point, and a rice boiling action is stored. When a rice boiling completion temperature is detected by a temperature sensing element 10, it is inputted through a temperature detecting circuit 11 to a microcomputer 12. The microcomputer 12 causes a transistor Q to be turned on, it causes the capacitor 15 to be discharged, the signal potential at the B point is made lower than the signal potential at the A point, and the heat reserving action is stored. Thus, even when the service interruption is generated in the middle of the rice boiling or heat reserving, a high potential or low potential at the B point is detected by the microcomputer 12 after the return of a power source, a TRIAC 7 for reserving a heat is conducted, and the return to a former rice boiling circuit 5 or heat reserving circuit 8 can be surely executed.
展开▼
