To ensure safety by preventing leaked refrigerant from further leaking outside with, for instance, burning consumption of the leaked refrigerant.

The refrigerating cycle which is provided with a compressor 3, a condenser 5, a throttling device 7 and an evaporator 9, employs an inflammable refrigerant as a refrigerant. On the occurrence of refrigerant leakage, the leaked refrigerant is subjected to burning consumption by a refrigerant burning consumption device 15, for instance, which is disposed near high pressure side piping 13, where the refrigerant leakage rapidly expands.