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HEAT PUMP CYCLE

  • US 20140318170A1
  • Filed: 12/03/2012
  • Published: 10/30/2014
  • Est. Priority Date: 12/05/2011
  • Status: Active Grant
First Claim
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1. A heat pump cycle, comprising:

  • a compressor that sucks and compresses a low-pressure refrigerant to supply a high-pressure refrigerant;

    a use-side heat exchanger to which the high-pressure refrigerant is supplied and a heat is supplied from the high-pressure refrigerant in a heating use;

    a decompressor that decompresses the high-pressure refrigerant to supply the low-pressure refrigerant in the heating use;

    an exterior heat exchanger including an air passage to allow an air to flow therein, and low-temperature medium tubes that conduct a heat exchange between the air and the low-pressure refrigerant and allow the low-pressure refrigerant to absorb a heat in the heating use; and

    an auxiliary heat exchanger that is arranged adjacent to the exterior heat exchanger, the auxiliary heat exchanger including an air passage to allow the air to flow therein, and high-temperature medium tubes that supply a heat to the exterior heat exchanger in the heating use, the heat supplied from the high-temperature medium tubes to the exterior heat exchanger being obtained from the high-temperature refrigerant which has been compressed by the compressor and is higher in temperature than the low-pressure refrigerant, whereinthe exterior heat exchanger and the auxiliary heat exchanger configure a first heat exchanger unit that is usable as an integrated unit,the low-temperature medium tubes and the high-temperature medium tubes are arranged to be thermally coupled with each other in at least a part of the first heat exchanger unit,the first heat exchanger unit includes an upstream row in which tubes are arranged in a line, and a downstream row in which tubes are arranged in a line on a downstream side of the upstream row in a flow direction of the air,the upstream row includes a group of the high-temperature medium tubes, and a group of the low-temperature medium tubes, andtubes of the group of the low-temperature medium tubes and tubes of the group of the high-temperature medium tubes are alternately arranged in at least a part of the upstream row.

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