Mixed flow impeller

Details Mixed flow impeller Mixed flow impeller

1988-10-05

1990-01-16

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Tined or irregular periphery

416237, 416243, 416223R, F24F 1104, F24F 1102

Patent

active

048939900

ABSTRACT:
The disclosure is directed to a mixed flow impeller with a low noise, to be used for a blower of an air conditioner or the like. The mixed flow impeller of the present invention is characterized in three points, i.e., thin thickness blade member increased in its thickness only at its leading edge, a plate-like triangular protrusion provided at an outer peripheral portion of the leading edge, and blade curvature line having its maximum curvature position deviated toward the trailing edge side through employment of a cubic curve. Since each of the above features may be caused to function independently, noise reduction is possible even if it is executed singly, but the maximum effect is available when the are effected in combination.

REFERENCES:
patent: 698582 (1902-04-01), Strothman
patent: 1050119 (1913-01-01), Flanders
patent: 1807397 (1931-05-01), Fechheimer
patent: 2086307 (1937-07-01), Stewart
patent: 2978040 (1961-04-01), Wirkkala
patent: 3972646 (1976-08-01), Brown et al.

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