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Apparatus for use as a heat pump

  • US 8,113,011 B2
  • Filed: 03/23/2006
  • Issued: 02/14/2012
  • Est. Priority Date: 03/23/2005
  • Status: Active Grant
First Claim
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1. Apparatus for use as a heat pump comprising:

  • a compression chamber;

    an inlet for allowing gas to enter the compression chamber;

    a compression piston stage comprising a compression piston for compressing gas contained in the compression chamber;

    a heat exchanger for receiving thermal energy from gas compressed by the compression piston;

    an expansion chamber for receiving gas after exposure to the heat exchanger;

    an expansion piston stage comprising an expansion piston for expanding gas received in the expansion chamber; and

    an exhaust for venting gas from the expansion chamber after expansion thereof;

    wherein the compression piston and the expansion piston are substantially rigidly coupled together by a linkage; and

    the compression piston comprises a compression piston aperture with a compression delivery valve for allowing gas to pass through the compression piston from the compression chamber to the heat exchanger.

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