| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat pump cycle using a supercritical cooling medium wherein a cycle result coefficient is improved by giving a heat quantity to an outdoor radiator when outside air is at a low temperature, thereby increasing work enthalpy on a high pressure side. SOLUTION: After the supercritical cooling medium pressurized by a compressor 2 is supplied to the indoor radiator 3 for heat exchange, the supercritical cooling medium passing through the indoor radiator 3 is cooled by an external cooling outdoor heat exchanger 4 and returned to the compressor 2. Herein, a heating source 10 is arranged on the upstream side of cooling outside air to be entrapped into the outdoor heat exchanger 4 for increasing the temperature of the outdoor heat exchanger 4 at its front face to raise evaporating pressure. Thereby, the specific volume of the supercritical cooling medium on an outlet side is reduced and the density of the supercritical cooling medium on the inlet side of the compressor 2 is increased, therefore reducing the work enthalpy of the compressor at a low outside air temperature to improve the cycle result coefficient. COPYRIGHT: (C)2004,JPO&NCIPI
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