| 摘要 |
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.
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