Refrigerant cycle with three-way service valve for environmentally friendly refrigerant

  • US 7,370,483 B2
  • Filed: 02/22/2005
  • Issued: 05/13/2008
  • Est. Priority Date: 02/22/2005
  • Status: Expired due to Fees
First Claim
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1. A refrigerant system comprising:

  • a compressor;

    a heat rejecting heat exchanger, an expansion device, and a heat absorbing heat exchanger; and

    wherein a single service valve is provided between the heat rejecting heat exchanger and the heat absorbing heat exchanger, said valve having a first fluid line communicating to an upstream pressure, a second fluid line communicating to a downstream pressure, said valve providing the function of allowing flow to pass through the valve while blocking flow from reaching a discharge port when in a fully closed position, allowing flow from said first fluid line and said second fluid line to reach said discharge port when in an intermediate position, and allowing flow from said first fluid line, but blocking flow from said second fluid line from reaching said discharge port in a fully open position.

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