High efficiency fan

Details High efficiency fan High efficiency fan

1989-08-11

1990-11-20

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Having clutch or brake means

416189, 416DIG5, F04D 2938

Patent

active

049715208

ABSTRACT:
The invention features an axial fan for passing air through a heat exchanger, the fan comprising a hub rotatable on an axis and a plurality of blades, each of which extend radially outward from a root portion attached to the hub to a tip portion, the blades characterized by a trailing edge angle that varies by approximately 40.degree. or more over the radial extent of each blade. The blade trailing edge angle is preferably greater than 60.degree. at the root region.

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