| 摘要 |
An impeller for blower comprising blades (15), notches (17) formed in the side edge of each blade (15) at predetermined intervals, and a plurality of smooth sections (18) formed between adjacent notches (17). Large-scale transverse swirls discharged from the side edges of the blades (15) are divided into by longitudinal swirls formed in the notches (17) smaller transverse swirls, which are organized in a small scale and stabilized, whereby aerodynamic noises are reduced.
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