Fan with dustproof structure

The utility model belongs to the technical field of fans, and particularly relates to a dustproof structure fan which comprises a support, an impeller, a bearing, a supporting shaft and a motor. A middle pipe extends upwards from the support, a mounting hole is formed in the middle pipe, and the bearing is arranged in the mounting hole; the motor comprises a stator and a rotor, and the stator sleeves the outer side of the middle pipe; the impeller comprises a fan blade shell and a plurality of blades arranged along the outer side of the fan blade shell; the rotor is arranged on the inner side of the coaming; and an annular mounting part is arranged on the bracket. According to the fan with the dustproof structure, the outer dustproof ring of the impeller and the frame body dustproof ring of the support form a first dustproof cavity, the dustproof cover forms a second dustproof cavity, the upper dustproof ring of the dustproof cover and the inner dustproof ring of the impeller form a third dustproof cavity, an