| 主权项 |
1. A centrifugal impeller comprising:
a base plate comprising a plurality of blade mounting portions, each of the blade mounting portions having a plurality of blade mounting holes; a cover plate defining an air inlet, the cover plate and the base plate disposed opposite to each other with a predetermined distance formed there between, the cover plate comprising a plurality of blade mounting portions; and a blade assembly fixedly mounted between the base plate and the cover plate, the blade assembly comprising a plurality of curved blades arranged about the air inlet, each blade being fixed between a corresponding one of the blade mounting portions of the base plate and a corresponding one of the blade mounting portions of the cover plate, each blade having a first side close to the cover plate and a second side close to the base plate, cover plate mounting portions projecting from the first side and base plate mounting portions projecting from the second side; wherein each of the blade mounting portions of the cover plate comprises a plurality of first mounting holes arranged outwardly from a region close to the air inlet, the first mounting holes having one of a regular polygon shape, elliptical shape and circular shape, and the cover plate mounting portions of each blade comprise a plurality of first mounting protrusions engaged with the plurality of first mounting holes. |
