Axial-flow fan

Details Axial-flow fan Axial-flow fan

2006-05-16

2006-05-16

Look, Edward K. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Having clutch or brake means

C416S238000

Reexamination Certificate

active

07044712

ABSTRACT:
This present invention relates to an axial-flow fan including a central hub connected with a driving shaft of a motor, and a plurality of blades extending radially along the circumference of the hub for blowing air toward an axial direction, the plurality of blades integrated with the hub into a single body, wherein assuming that a camber ratio at a blade root(cr1) of each blade is the value obtained by dividing a maximum camber value at the blade root into a chord length, a camber ratio at a blade tip(cr2) of each blade is the value obtained by dividing a maximum camber value at the blade tip into the chord length, and a percentage of decrease of the camber ratio is the value obtained by dividing a difference value between the camber ratio at the blade root(cr1) and the camber ratio at the blade tip(cr2) into the camber ratio at the blade root(cr1), the percentage of decrease of the camber ratio is in a range between 33% and 85%.

REFERENCES:
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patent: 6394754 (2002-05-01), Choi
patent: 6447251 (2002-09-01), Zeng
patent: 6908287 (2005-06-01), Cho et al.
patent: 2002/0034443 (2002-03-01), Song
patent: 2003/0012656 (2003-01-01), Cho et al.
patent: 0 282 074 (1988-09-01), None
patent: 1 083 391 (2001-03-01), None

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