| 摘要 |
PROBLEM TO BE SOLVED: To improve capacity and efficiency in cooling operation. SOLUTION: A refrigerant pressurizing pump 38 is provided between an accumulator 24 and an indoor heat exchanger 32, and a liquid refrigerant in the accumulator 24 is supplied to the indoor heat exchanger 32 by the sucking action of an ejector 39 for cooling and the operation of the refrigerant pressurizing pump 38. Thus, the intake pressure of a compressor 12 can be increased by the pressurising effect of the refrigerant pressurizing pump 38 and the ejector 39 for cooling, so that the refrigerant circulating amount to the indoor heat exchanger 32 exhibiting the cooling action is increased more than before so as to improve the cooling capacity. Further, when the cooling capacity is made equal, the rotational frequency of the compressor 12 can be reduced, and the efficiency of a system can be improved. COPYRIGHT: (C)2008,JPO&INPIT
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