Ducted fan with inlet vanes and deswirl vanes

US20090263238A1Inactive Publication Date: 2009-10-22MINEBEA CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
MINEBEA CO LTD
Publication Date
2009-10-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

A fan apparatus includes a ducted housing with an axis of rotation including a first section and a second section. The fan apparatus further includes a first plurality of vanes being radially coupled within the first section and a second plurality of vanes being radially coupled within the second section. Additionally, the fan apparatus includes an impeller with a plurality of blades rotatably disposed within the ducted housing between the first plurality of vanes and the second plurality of vanes for rotary motion about the axis of rotation. The first plurality of vanes are stationary in a first arrangement to guide an inflow of air towards the impeller. The plurality of blades are rotary in a second arrangement to have a rotational direction substantially opposite to the inflow of air guided by the first arrangement. The second plurality of vanes are stationary in a third arrangement to diffuse an outflow of air substantially along the axis of rotation.
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Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates generally to air processing techniques, and in particular to a fan apparatus having improved output capacity.

[0002] Developments and operations of high density integrated circuits, high-power electronics, avionics, and advanced telecommunication equipment usually are associated with the generation of large amounts of heat. How to dissipate this heat quickly and effectively is an important concern. A widely used solution is air cooling with a fan apparatus. Conventional cooling fans typically run at relatively low rotational speeds, e.g., 15,000 RPM (rotations per minute) or lower. In order to drive up the rotational speeds, a ducted fan can be used to provide more air flow at high pressure while keeping the size of the ducted fan frame the same.

[0003] One conventional ducted fan configuration includes just a single set of stationary vanes (usually used as inlet guide vanes) followed by a single rotating impeller. The flow ...

Claims

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