Noise reduction device for air-cooled case

The utility model discloses a noise reduction device for an air-cooled cabinet, and the device comprises the air-cooled cabinet which is internally provided with a noise reduction structure. The noisereduction structure comprises a pair of resin sound absorption cotton, a mute fan, a pair of rectangular plates and two pairs of strip-shaped sliding rails. A pair of strip-shaped through holes are formed in the edges of the left and right side wall surfaces of the upper wall surface of the air cooling case; two pairs of strip-shaped grooves corresponding to each other in position are formed in the inner side wall surface of the air cooling case; the two pairs of strip-shaped sliding rails are arranged in the two pairs of strip-shaped grooves respectively, moving wheels are installed on the two pairs of strip-shaped sliding rails respectively, and supporting rods penetrating through the pair of moving wheels are installed in the pair of strip-shaped grooves respectively. Noise generated by operation of internal c