Axial fan with low noise bellows

The utility model provides an axial fan with low noise bellows, the problem that the to be was solved is that current axial fan can produce great noise in comparatively quiet place, its technical essential is the casing is the tube -shape bellows, is provided with the motor support on the bellows inner wall, and motor support upper end is provided with the motor, is provided with the impeller on the output shaft of motor, the impeller is provided with a plurality of fish scales shape arch by at least three blades on the windward side of every blade, the utility model has the advantages that not changing under the condition that varying axial flows the fan volume, keep rotation number of motor, obtain fixed air volume and make noise control that the fan produced under operating condition at lower within range in the unit interval. The utility model discloses still have simple structure, easy and simple to handle, characteristics such as the practicality is strong. 本实用新型提供了种带有低噪声风箱的轴流风机，所要解决的问题是现有轴流风机在较为安静的场所会产