Orificed shroud for axial flow fan

Details Orificed shroud for axial flow fan Orificed shroud for axial flow fan

1990-12-14

1993-09-28

Look, Edward K.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Casing with axial flow runner

415220, 416189, F04D 1900

Patent

active

052482243

ABSTRACT:
A shroud for an axial flow fan having an orifice designed to improve the overall flow efficiency of the fan. In preferred embodiments, the shroud is generally toroidal in form with a cross section that is ellipsoidal in the area of the shroud leading edge with interior and exterior wall segments that taper and converge at the trailing edge of the shroud. The shroud is particularly suited for use with a recessed fan used in the outside enclosure of a "split" air conditioning (including heat pump) system, enabling the same flow of air through the enclosure with less radiated noise than prior art shroud designs.

REFERENCES:
patent: 1497408 (1920-06-01), Seelig
patent: 2123657 (1937-07-01), Munk
patent: 2925952 (1954-06-01), Garve
patent: 3620640 (1971-11-01), Soulex-Lariviere
patent: 4061188 (1977-12-01), Beck
patent: 4927328 (1990-05-01), Scoates et al.

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