Centrifugal fan and casing thereof

Details Centrifugal fan and casing thereof Centrifugal fan and casing thereof

2007-04-24

2007-04-24

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Casing having tangential inlet or outlet

C415S203000

Reexamination Certificate

active

11078593

ABSTRACT:
A centrifugal fan includes a scroll casing having an almost cylindrical shape. The casing consists of first and second casings. The first casing constitutes one base wall and a part of a side circumferential wall of a cylinder, and the second casing constitutes the other base wall and the remaining part of the side circumferential wall. An air inlet is formed on a center portion of the base wall of the first casing, and an exhaust port that is formed on the side circumferential wall. An impeller having many blades and a motor for driving the impeller are contained in the casing. A cylindrical partition that is formed on the inside of the base wall of the second casing over the entire circumference. The partition consists of a high partition formed in at least a region close to the exhaust port and a low partition formed in the other region.

REFERENCES:
patent: 6575701 (2003-06-01), Kamiya et al.
patent: 2005/0207888 (2005-09-01), Kashiwazaki et al.
patent: 7-46811 (1995-02-01), None
patent: 7-91400 (1995-04-01), None
patent: 2004016719 (2004-02-01), None
U.S. Appl. No. 11/339,610, filed Jan. 26, 2006, Kashiwazaki et al.
U.S. Appl. No. 11/339,611, filed Jan. 26, 2006, Senba.
U.S. Appl. No. 11/392,749, filed Mar. 30, 2006, Shimada.

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