Low-noise wall type axial flow fan

Abstract

The utility model discloses a low-noise wall type axial flow fan which comprises a rectangular outer shell, a motor is arranged in the rectangular outer shell, an impeller is fixed on an output shaft of the motor, an inner shell made of a perforated plate is fixed on the inner side wall of the rectangular outer shell, and sound insulation cotton is filled between the inner shell and the rectangular outer shell. A radial extending edge part is formed on the outer side wall of the inner end of the rectangular outer shell, the radial extending edge part is inserted into a mounting through hole of a wall body, and the outer side wall of the radial extending edge part is tightly attached to the inner side wall of the mounting through hole; the rainproof cover can be detached and is convenient to clean and maintain, the inner shell and the sound insulation cotton can reduce noise, and the using effect is improved.

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