CONTROL CIRCUIT FOR CAR-MOUNTED AIR CLEANER

PURPOSE:To prevent battery consumption due to switching failure in oblivion, by turning input of a cleaner to OFF when a door is closed since it has opened, and making this off-state so as to be maintained up to a main switch, in case of a control circuit available in a vehicle with such room lamp that turns on or off an air blower with the door opened or closed. CONSTITUTION:When a main switch 3 is closed, NPN type transistors 11 and 9 are turned on, an electric blower 2 is driven, and an air cleaner is operated. And, a door switch 4 is closed with a door opened whereby a room lamp 5 is lighted, and these NPN type transistors 11 and 9 come off, stopping the electric blower 2, then a condenser 15 discharges. And, when the door is closed, the door switch 4 is opened, but since the NPN type transistor 9 is off, the transistor 11 also maintains the off-state, so that the blower 12 is not driven. Therefore, it will not be driven till the main switch 3 comes on, so that even if power switching failure in oblivion happens there, battery consumption is preventable in this way.