Radial-flow heat-dissipating fan with increased inlet airflow

Details Radial-flow heat-dissipating fan with increased inlet airflow Radial-flow heat-dissipating fan with increased inlet airflow

2006-11-14

2006-11-14

Nguyen, Ninh H. (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural rigidly related blade sets

C415S206000, C416S175000, C416S19800R, C416S203000

Reexamination Certificate

active

07134839

ABSTRACT:
A radial-flow heat-dissipating fan includes a casing and a cover mounted to a side of the casing. The casing includes a compartment and a side air outlet, and the cover includes an air inlet. A primary fan wheel is rotatably mounted in the compartment and the primary fan wheel includes a hub and a plurality of radial-flow blades surrounding the hub. An auxiliary fan wheel is mounted in the air inlet of the cover and includes a plurality of axial-flow blades. An airflow transition area is defined between a circumference of the hub of the primary fan wheel, the radial-flow blades, and the axial-flow blades. The axial-flow blades increase axial inlet airflow via the air inlet, with the airflow transition area changing a direction of the axial inlet airflow into centrifugal airflow that is outputted via the side air outlet by the radial-flow blades.

REFERENCES:
patent: 902533 (1908-10-01), Hubbard
patent: 6457955 (2002-10-01), Cheng
patent: 7008189 (2006-03-01), Jarrah et al.
patent: 52016010 (1977-02-01), None
patent: 387512 (2000-04-01), None

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