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Printed circuit board-mounted, sealed heat exchanger

  • US 5,835,349 A
  • Filed: 06/12/1997
  • Issued: 11/10/1998
  • Est. Priority Date: 06/12/1997
  • Status: Expired due to Term
First Claim
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1. A housing enclosure for securely retaining and cooling a plurality of printed circuit boards in parallel, spatially aligned relationship comprising:

  • a chassis having a card-insertion cavity between parallel sidewalls thereof containing a plurality of card-guide slots, that receive and guide side edges of said printed circuit boards for insertion into an arrangement of electrical connectors at a first portion of said chassis, so that said printed circuit boards are retained in mutually adjacent, spatially parallel relationship with one another;

    a cooling fluid supply/exhaust plenum at a second portion of said chassis spaced apart from said first portion of said chassis by said card-insertion cavity therebetween, and includinga cooling fluid supply chamber, to which cooling fluid for cooling circuit components of said printed circuit boards is supplied, said cooling fluid supply chamber having a plurality of cooling fluid supply apertures, anda cooling fluid exhaust chamber adjacent to said cooling fluid supply chamber and from which said cooling fluid having cooled said circuit components of said printed circuit boards is removed, said cooling fluid exhaust chamber having a plurality of cooling fluid removal apertures adjacent to said plurality of cooling fluid supply apertures; and

    a plurality of thermally conductive heat exchangers, a respective thermally conductive heat exchanger of said plurality of thermally conductive heat exchangers being attached to and in thermally conductive engagement with a first side of a respective printed circuit board of said plurality of circuit boards, so as to draw heat away from and thereby cool said circuit components mounted to a second side of said respective printed circuit board, and wherein said respective thermally conductive heat exchanger includesa cooling fluid inlet port joined in sealing engagement with a respective cooling fluid supply aperture of said plurality of cooling supply apertures of said cooling fluid supply chamber of said cooling fluid supply/exhaust plenum, and through which said cooling fluid is introduced from said cooling fluid supply/exhaust plenum, anda cooling fluid outlet port adjacent to said cooling fluid inlet port and joined in sealing engagement with a respective cooling fluid removal aperture of said plurality of cooling fluid removal apertures of said cooling fluid exhaust chamber of said cooling fluid supply/exhaust plenum, and through which said cooling fluid is exhausted from said heat exchanger into said cooling fluid supply/exhaust plenum.

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