| 摘要 |
PROBLEM TO BE SOLVED: To provide a freezing and refrigerating unit that can avoid such a failure as to cause a sudden stop of cooling as much as possible by detecting the leakage of a refrigerant before the load of a compressor increases after air flows in even if piping is damaged at a low-pressure side, such as the connection section to an evaporator 22, and can secure high safety by using a flammable refrigerant having a small global warming coefficient and a refrigerator using the same. SOLUTION: R290 or a mixed refrigerant with R290 as a main constituent is used as a refrigerant, and an evaporation temperature sensor 23 for detecting the piping temperature of the evaporator 22 is provided, thus determining that the refrigerant has leaked when the detection temperature of the evaporator temperature sensor is equal to or smaller than the boiling point of the refrigerant, and hence shifting to control corresponding to the leakage. COPYRIGHT: (C)2006,JPO&NCIPI
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