Impeller for vacuum cleaner with tapered blades

A - Human Necessities – 47 – L

Patent

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Details

A47L 5/22 (2006.01) F04D 29/28 (2006.01)

Patent

CA 2229513

A fan for a vacuum cleaner has a fan housing, a motor and an impeller. The fan housing has an inlet, an outlet, a scroll-shaped side wall, a back wall and a flat front wall. The impeller (24) has a hub and multiple blades (46). Said blades (46) have a leading edge (50) that is tapered upward, a top edge (52) that is tapered downward, and a trailing edge (54) that is tapered downward. Such tapering of the top edge (52) and trailing edge (54) provides less noise and better durability without diminishing air performance.

La présente invention concerne une soufflerie d'aspirateur se composant d'un logement de soufflerie, d'un moteur électrique et d'une turbine. Le logement de soufflerie comprend un orifice d'admission, un orifice de sortie, une paroi latérale spiralée, une paroi arrière et une paroi avant plane. La turbine (24) possède un moyeu ainsi que plusieurs pales (46), lesquelles pales (46) sont trapézoïdales et possèdent un bord d'attaque (50) orienté vers le haut, un bord supérieur (52) orienté vers le bas, et un bord de fuite (54) orienté vers le bas. La forme trapézoïdale des pales au niveau du bord supérieur (52) et du bord de fuite (54) permet de diminuer le bruit et d'obtenir une plus grande durée de vie sans pour autant réduire les performances aérodynamiques.

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