Browse Prior Art Database

LOW COST CARD-CAGE FOR MINIMUM AIRFLOW IMPEDANCE

IP.com Disclosure Number: IPCOM000006547D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2002-Jan-14
Document File: 3 page(s) / 115K

Publishing Venue

Motorola

Related People

Royston J. Fox: AUTHOR

Abstract

A card cage is shown in Figures 1 and 2 with integral cooling system features for high density electronics. The original application was a housing for twin board mounted power supplies dissipating a total of approximately 360 W CARD GUIDES AND EXTRACTOR LOCATIONS: The card guide is formed as an integral part of the module mounting cage with cross members distributed along the rail length. The rigidity is provided by the extrac- tor location channel and the guide profde.

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MOIOROLA INC. Technical Developments Volume 16 August 1992

LOW COST CARD-CAGE FOR MINIMUM AIRFLOW IMPEDANCE

by Royston J. Fox

  A card cage is shown in Figures 1 and 2 with integral cooling system features for high density electronics. The original application was a housing for twin board mounted power supplies dissipating a total of approximately 360 W

CARD GUIDES AND EXTRACTOR LOCATIONS:

  The card guide is formed as an integral part of the module mounting cage with cross members distributed along the rail length. The rigidity is provided by the extrac- tor location channel and the guide profde.

BACKPLANE LOCATION:

  The location is derived from the nutserts on the mod- ule mounting cage. The tolerance chain relating the backplane to the module is restricted to a single component.

FAN CARTRIDGE AND FLOW DISTRIBLiTION PLENUM:

  The fans are attached to the guard/retainer. This forms a sub-assembly which is then mounted onto the air duct. This operation is carried out from the front of the unit. In combination with the side plates the duct forms a means of air distribution to the electronics. The angle of the duct is chosen such that the cross section of the plenum at any point is greater than the downstream inlet area to the boards.

  Cost reduction is achieved by reducing the part count and maximizing the functionality of a formed sheet metal component with two flanged side plates. Primary items eliminated are:

2 Drilled Rail Extrusions with Board Extractor

 Locations 2 S...