| 摘要 |
PROBLEM TO BE SOLVED: To maintain the quality of goods by enabling continuation of refrigerating operation even when a device on the side of the heat source happens to stop while improving heat efficiency. SOLUTION: In this system, a liquid pipe 71 is connected to a heat source side heat exchanger 33 of heat source units 3A and 3B, while the delivery side of a compressor mechanism 31 of the heat source units 3A and 3B is changed over to communicate with the heat source side heat exchanger 33 or a high pressure gas pipe 72, and the suction side thereof is changed over to communicate with the heat source heat exchanger 33 or a low pressure gas pipe 73. Moreover, a room unit 40 is provided with one end thereof communicating with the liquid pipe 71, while the other end thereof is changed over with the high pressure gas pipe 72 and the low pressure gas pipe 73. In addition, a refrigerant heat exchanger 50 is provided with one end of an evaporation part 51 communicating with the liquid pipe 71 and the other end thereof with the low pressure gas pipe 73. Moreover, there is arranged a low temperature side refrigerant circuit 20 for refrigeration in which a condensing part 52, a low temperature side expansion valve 22 and an evaporator 23 of a refrigerant heat exchanger 50 are connected to a compressor 21.
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