Flour mill hopper exhaust device

The utility model discloses an exhaust device for a hopper of a flour mill. The problem that the exhaust device is not easy to clean is effectively solved. Comprising a frame body detachably installed on the flour mill, a rotating shaft is rotationally arranged in the frame body, a plurality of sliding grooves parallel to the axis are formed in the outer portion of the rotating shaft, wind wheel plates are detachably installed in the sliding grooves, the side, close to the flour mill, of the frame body is provided with an opening, the side, away from the flour mill, of the frame body is detachably provided with a filter screen, and a driving box is arranged at one end of the frame body; a motor for driving the rotating shaft is arranged in the driving box, and a cover plate is detachably arranged at the other end of the frame body; the air exhaust device is simple in structure and convenient to use, after much dust is accumulated in the air exhaust device, the cover plate is detached, and the filter screen an