Invention Grant
US08152474B2 Cooling fan impeller 有权
冷却风扇叶轮

Cooling fan impeller
Abstract:
An impeller of a centrifugal fan includes a hub and a plurality of blades arranged on and around the hub. Each of the blades includes a root portion and a tip portion. The tip portion of each of the blades has a concave surface and a convex surface in rear and front sides thereof respectively. In a rotational direction of the impeller, the tip portion of a rear blade protrudes towards a front blade.
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