Centrifugal fan

Details Centrifugal fan Centrifugal fan

2007-08-14

2007-08-14

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Pump outlet or casing portion expands in downstream direction

C415S212100

Reexamination Certificate

active

11282565

ABSTRACT:
It is possible to keep a diameter of an impeller and a cross sectional area of an air channel as large as possible while reducing a size of a centrifugal fan in a direction perpendicular to an axis. Thereby, it is possible to acquire characteristics of a high air volume and a high static pressure without lowering the efficiency. In the centrifugal fan, when the radial gap of the cross section in an air channel10bis gradually enlarged from a clapper portion10ctoward an outlet10dexcept for a specific region10h,the cross inner sectional area of an air channel10bis gradually enlarged from the clapper portion10ctoward the outlet10d.

REFERENCES:
patent: 5839879 (1998-11-01), Kameoka et al.
patent: 6588228 (2003-07-01), Choi
patent: S52-140408 (1977-10-01), None
patent: S53-38248 (1978-04-01), None
patent: S58-70498 (1983-05-01), None
patent: 60-145497 (1985-07-01), None
patent: 2003-69265 (2003-03-01), None

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