Air volume adjusting device for heating ventilation air conditioner

The utility model discloses an air volume adjusting device for heating ventilation air conditioner in the technical field of filter presses, which comprises an air inlet pipe and an air outlet cover, a flange plate is fixedly arranged at an air inlet port of the outer side of the air inlet pipe, an inner pipe is fixedly arranged in an inner cavity of the air inlet pipe through a support, and sliding grooves are symmetrically arranged on two sides of the inner wall of the inner pipe. The outer side of the screw rod is sleeved with a sliding block in a threaded mode, sliding rods are fixedly and symmetrically connected to the two sides of the sliding block, the side, facing the flange plate, of the sliding block is rotationally connected with multiple sets of adjusting plates, an air filtering plate is fixedly arranged in an inner cavity of the air outlet cover, a silencing plate is fixedly laid on the side wall of the inner cavity of the air outlet cover, and multiple sets of shutters are rotationally arranged