Axial flow fan

Details Axial flow fan Axial flow fan

2006-04-18

2006-04-18

Nguyen, Ninh H. (Department: 3745)

Rotary kinetic fluid motors or pumps

Method of operation

C415S178000, C415S221000, C416S243000, C416SDIG004

Reexamination Certificate

active

07029229

ABSTRACT:
An axial flow fan of high efficiency and low noise level is provided. The fan includes a motor, an impeller having a plurality of blades around a hub fitted to the motor, and a fan casing having an air inlet on one side and an air outlet on the other, wherein a radial position with a maximum setting angle in a blade section, and a radial position with a contour of a leading edge portion in a fluid flowing direction forming a projecting apex in the flowing direction are located between 60% and 80% of the outside diameter of the impeller.

REFERENCES:
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patent: 11-44432 (1999-02-01), None
patent: 2002-257088 (2002-09-01), None
Namai, et al., “Turbo-fan and compressor”, Published Aug. 25, 1988, pp. 357-418 and English language translation.

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