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Circuit Card With Attached Cooling Feature

IP.com Disclosure Number: IPCOM000109927D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 1 page(s) / 52K

Publishing Venue

IBM

Related People

Mansuria, MS: AUTHOR [+3]

Abstract

Disclosed is an electronic circuit card having an attached cooling feature consisting of an air duct, with an open side lying against a surface of the card, through which air is pulled from an open end by an exhaust fan.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 83% of the total text.

Circuit Card With Attached Cooling Feature

      Disclosed is an electronic circuit card having an attached
cooling feature consisting of an air duct, with an open side lying
against a surface of the card, through which air is pulled from an
open end by an exhaust fan.

      An electronic circuit card assembly 10 includes a number of
circuit modules 12, many of which generate significant heat during
operation, and some of which may be attached to heat sinks with
outward-extending cooling pins 14.

      An air duct 16 is attached to project from one side of card
assembly 10, having a rectangular inlet 18, and an exhaust section
20, in which an axial-flow exhaust fan 22 operates to pull cooling
air inward past circuit modules 12 and cooling pins 14.  Air duct 16
is preferably of a one-piece molded thermoplastic construction,
forming, with card assembly 10, a space which is closed except for
inlet 18 and fan 22.  Duct 16 is widened at inlet 18 to increase the
quantity of air drawn through and to provide for heat sink
arrangements projecting farther outward.  The air duct along with the
card can be of irregular shape to provide higher air flow over high
power components and low air flow (air verocity) over the low power
components.

      In a system configuration, air may be supplied to duct 16 from
an external fan blowing air toward inlet 18, and air from fan 22 may
be exhausted by another fan external to this feature.  Electrical
connections to fan 22 a...