Air conditioner internal dust removal device

The utility model discloses a dust removal device in an air conditioner. The dust removal device comprises a supporting plate, the supporting plate comprises a supporting plate body, a fixing plate isarranged on the supporting plate body, a dustproof part is arranged on the supporting plate, a dust removal part is arranged on the supporting plate, the dust removal part comprises a third rotatingshaft, the supporting plate is provided with a third motor, and an output shaft of the third motor penetrates through a fourth through hole to be fixedly connected with a second belt wheel. The dust removal device is fixed at the air inlet of the air conditioner indoor unit through the matching of the screw rod and the first through hole; air conditioner starting, first of all, rotation by a second motor, the air port is completely covered by the dustproof belt; the third motor works to drive the dust removal part to rotate on the supporting plate, so that the brush wires remove dust of the dust screen, the dust-proof