Centrifugal fan

Details Centrifugal fan Centrifugal fan

2005-11-24

2010-11-16

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

C415S204000, C415S206000

Reexamination Certificate

active

07832982

ABSTRACT:
A centrifugal fan comprises a casing (2) and an impeller (5) that is mounted in the casing (2) and turns about a defined axis of rotation (X). The casing (2) has an axial inlet opening, through which air is drawn in, and a tangential air discharge opening (7). The tangential discharge opening (7) is delimited by a first edge (8) that is substantially parallel with the axis of rotation (X) and is located in the vicinity of the impeller (5), by a second edge (9) opposite the first edge (8) and spaced from the impeller (5) and by two lateral edges (10), each joining the first edge (8) to the second edge (9). The centrifugal fan also comprises an appendage (12) located in the vicinity of the tangential discharge opening (7), delimited by the first edge (8) and having a convex surface (16) inside the casing (2) and a connecting surface (15) between the convex surface (16) and the first stage (8).

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