| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for achieving a combustion device, wherein a valve-opening state is never kept, even if a solenoid valve is closed once according to instructions of a timer circuit and thereafter the solenoid valve is opened again by a valve-opening operation by a user. <P>SOLUTION: Transistors 16, 18 and a solenoid valve 36 are arranged in the order of the transistor 16, the transistor 18 and the solenoid valve 36 toward a grounding potential side from a power supply 14 side. A signal output from the transistor 18 is never supplied to a timer circuit 30. Accordingly, even when the transistor 16 is brought into a state allowing power to be supplied to the solenoid valve 36 after the solenoid valve 36 is closed according to the instructions of the timer circuit 30, the transistor 18 is never restored to a state allowing power to supplied to the solenoid valve 36 from a state prohibiting the power supply. Accordingly, even if a user opens the solenoid valve 36 by performing a valve-opening operation thereafter, power is not supplied to the solenoid valve 36, thereby the solenoid valve 36 is never kept in a valve-opening state. <P>COPYRIGHT: (C)2012,JPO&INPIT |
