| 摘要 |
PROBLEM TO BE SOLVED: To obtain a compression heat pump which can be protected effectively against damage due to abrupt inner temperature rise. SOLUTION: Means 9, 10 for detecting the degree of superheat Si of refrigerant R sucked into a compressor 1 and the degree of superheat So of refrigerant R delivered from the compressor 1 are provided. Based on the information detected by the detecting means 9, 10, a protective control means 11 executes a specified protective control, e.g. stopping of the compressor, if the degree of superheat Si of refrigerant R sucked into a compressor 1 is higher than the degree of superheat So of refrigerant R delivered from the compressor 1 and the difference exceeds a set allowance a (Si>So+α).
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