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Adjustable Air Wedge for Controlling Air Flow and Reduction of Air Acoustic Noise

IP.com Disclosure Number: IPCOM000088092D
Original Publication Date: 1977-Apr-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Chu, RC: AUTHOR

Abstract

The air wedge provides a means for controlling the air flow in an air cooling system. More specifically, it consists of a wedge-like device which is mechanically adjustable or self-regulating thermally or electrically and which provides converging flow in an electronic package or assembly.

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Adjustable Air Wedge for Controlling Air Flow and Reduction of Air Acoustic Noise

The air wedge provides a means for controlling the air flow in an air cooling system. More specifically, it consists of a wedge-like device which is mechanically adjustable or self-regulating thermally or electrically and which provides converging flow in an electronic package or assembly.

Referring to Fig. 1, it can be seen that the wedge 11 is made of a plastic or metallic grid 10 with compressible foam 12 sandwiched therein. The foam 12 is a specially selected sound absorbing material. As shown in Fig. 2, the wedge-like device 11 is designed such that its angle can be changed to gain desired flow control. In channel 1, the wedge 11 is shown opened relatively wide to provide more pressure drop, thus less flow thru the channel. Channel 2 shows the wedge 11 opened only slightly so that air flow is maximized, and there is very little velocity change from bottom to top. In channel 3, the wedge is shown completely opened so that no air can flow through. This is intended for empty card columns where air flow would otherwise be wasted.

Thus, this device can be used in an air cooling system to provide better air distribution at the inlet. It also provides acceleration flow to improve cooling of down-stream components. Thus, local control can be obtained in a centralized air cooling system while at the same time providing a reduction in acoustic noise. It also provides reduced air volume f...