Patent ID: 8801406

Claim:
A blower, comprising: a) a blower volute; b) a blower motor; and c) a fan wheel; wherein the blower motor is disposed at the top of the blower volute; the fan wheel is disposed inside the blower volute and connected to the blower motor; the blower volute comprises an air inlet, an air outlet, a cover body, and a bottom cover; a plurality of installation parts are disposed at an outer side of the cover body; the bottom cover is embedded within the cover body; and the bottom cover and the cover body are welded together; the bottom cover comprises a circular base plate embedded into an inner wall of a bottom of the cover body and a convex ring body located in a middle of the circular base plate; the air inlet is disposed in the middle of the circular base plate and the convex ring body is located at an outer side of the air inlet; a bottom surface of the circular base plate and outer edges of the air inlet are provided with a plurality of reinforcing ribs; the fan wheel comprises an upper disk, a lower disk, and a plurality of fan blades disposed between the upper disk and the lower disk; a through hole is arranged in a middle of the lower disk and the convex ring body extends into the through hole; a shaft sleeve is arranged in a middle of the upper disk; the shaft sleeve is tightly connected to a shaft extension end of a rotating shaft of the blower motor; the shaft sleeve is embedded into a central through hole disposed at the top of the cover body; a top inner wall of the cover body is arranged with a convex portion located at an outer side of the shaft sleeve and disposed above an end surface of the upper disk; the outer edge of the upper disk is arranged with a plurality of fan blades; and the upper disk and the lower disk are either welded together; and a number of the fan blades is 8-12.