Automatic starting device for exhaust fan of carbon monoxide alarm

The utility model discloses an automatic starting device for an exhaust fan of a carbon monoxide alarm, which comprises a detection device arranged on a wall and an exhaust device arranged in a suspended ceiling, the detection device comprises a base fixed on the wall, a connecting seat hung on the base, and a mounting box arranged on one side, far away from the base, of the connecting seat, an air extracting pump, a carbon monoxide sensor, a single chip microcomputer and a buzzer are arranged in the mounting box, the inlet end of the air extracting pump is connected with a sampling pipe, and the outlet end of the air extracting pump is connected with the carbon monoxide sensor; the exhaust device comprises an exhaust outlet, an exhaust pipe, an exhaust fan and a self-drooping shutter which are connected in sequence, and a starting device is arranged in the exhaust pipe and electrically connected with the single chip microcomputer. The device has the advantages that the sampling pipe is arranged to increase t