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Capillary pump evaporator

  • US 5,303,768 A
  • Filed: 02/17/1993
  • Issued: 04/19/1994
  • Est. Priority Date: 02/17/1993
  • Status: Expired due to Term
First Claim
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1. In a capillary pump loop, an evaporator comprising:

  • a tubular wick for containing working liquid flow centrally therein, the body of the wick being saturated with the liquid;

    a tubular heat exchanger for tightly receiving the wick, the heat exchanger being subjected to ambient heat which causes liquid to undergo phase transformation to vapor at an interface between an outer surface of the wick and an inner surface of the heat exchanger;

    a threaded groove circumferentially extending over the inner surface of the heat exchanger, about an axis of the heat exchanger, the groove opening onto the interface between the wick and the heat exchanger; and

    axially oriented vapor channels extending along the entire length of the wick and opening onto the interface, wherein the channels intersect the circumferential grooves to form a shortened vapor outlet path from the interface.

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