Blower

The utility model provides a blower. The blower can effectively restrict balance weight parts from stripping from concave portions when rotating balance adjustment is carried out in the blower or the balance adjustment is finished, and the balance weight parts are filled and arranged in the concave portions installed on a rotor. The blower is provided with a rotor and a concave portion. The rotor comprises impellers provided with blades on the outer periphery of a hub, and a rotating shaft which is arranged in the center of the hub, and the rotating shaft is supported in the center of the rotor in a free-rotation mode. The concave portion is arranged on the face where the hub intersects with the axial direction, and clayey balance weights (balance weight parts) like putty are filled in the concave portion. The concave portion is provided with first areas and second areas, wherein the first areas are configured to the same periphery shape and extend along periphery direction roughly; and the second areas are c