Motor driven fan for vacuum cleaner with suction effected by rotor impeller

摘要

The fan (200) contains an impeller (210) on which curved ribs (211) are formed in one piece unit. The air flows through a suction inlet (18) due to the suction effected by the rotation of the impeller, and after the dust removal, the suction air is passed out through outlets and discharged from the body. A reinforcing element (220) is fitted in the centre part of the impeller, for the reception of the vacuum unit shaft (13) retained by a nut (16). The fan impeller has a cylindrical passage opening, with which the surface of its top section contains a somewhat wider diameter than the surface of the lower section. The passage opening contains vertical slots, which are positioned at equal angles along an inner wall surface of this, at a specified depth.