| 摘要 |
PURPOSE:To contrive the reduce the capacity of a power source device for energizing and to stabilize operation, by a method wherein a plurality of solenoid valves for strong and weak energizing are used, and driving is so conducted that each periods of short strong energizing does not overlap on each other. CONSTITUTION:Even in case of closing a switci 2 after closing a switch 21 by an erroneous operation, that is, in the case where a solenoid 3 for the first low- power control valve and a solenoid 23 for the second low-power solenoid valve are energized when the switch 2 is closed, a relay 19 so functions that a contact 20 thereof is opened when the electric currents flowing through the solenoids 3, 23 are sufficiently small not to reach saturation, and the energization of the solenoid 23 is eliminated, so that the load of a battery power source 1 is not increased. In this case, since the switch 21 is closed, strong energizing of the solenoid 23 is started subsequently to the completion of the strong energization of the solenoid 3, and a main burner 16 is ignited after a pilot burner 15 is ignited. |
