Centrifugal blower

Details Centrifugal blower Centrifugal blower

2005-11-15

2005-11-15

Nguyen, Ninh H. (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Casing having tangential inlet or outlet

C415S206000, C415S211200, C415S228000, C416S18600A, C416S189000

Reexamination Certificate

active

06964555

ABSTRACT:
In a centrifugal blower, a centrifugal fan is housed in a scroll casing and driven by a motor. The scroll casing includes a suction scroll wall and a motor scroll wall. The scroll casing forms a scroll air passage between a first protruding portion of the suction scroll wall and a second protruding portion of the motor scroll wall. A fin is provided in the scrolled air passage as a directing member for directing a secondary flow in a direction parallel to a direction of a primary flow discharging from the centrifugal fan. The fin restricts the secondary flow from colliding with the primary flow, thereby to reduce noise due to interference of the air flows.

REFERENCES:
patent: 2330938 (1943-10-01), Williams
patent: 6575701 (2003-06-01), Kamiya et al.
patent: 61-200494 (1986-12-01), None
patent: 1-193099 (1989-08-01), None
patent: 5-195995 (1993-08-01), None

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