Blower for hair dryer - has cylindrical housing wall with recess capable of removing material from impeller blade tips

摘要

The blower (10) particularly for a hair dryer, has a bladed impeller (18) arranged inside a cylindrical housing wall (12). The inner wall (12) surface (20) facing the blade tips (66) is provided with a device for removing material from the blade tips. The device may comprise a recess (48) in the inner wall surface (20). One wall portion of the recess may form a cutting edge with the inner wall surface. The cutting edge may extend from the inlet side (24) to the outlet side (26) of the wall (12).