| 摘要 |
PROBLEM TO BE SOLVED: To obtain a mixed working fluid containing a lubricating oil other than ester oil and a specific refrigerant mixture, giving little influence on the ozone in stratosphere and the global warming, having excellent flame-retardancy, safety, refrigerating capacity and coefficient of performance and usable in existing refrigeration cycle apparatus. SOLUTION: This working fluid contains (A) a lubricating oil other than ester oil, (B) a mixture of (B1 ) 20-95wt.% of trifluoroiodomethane, (B2 ) 5-80wt.% of cyclopropane and, as necessary, either one of (B3 ) <=50wt.% of isobutane and (B4 ) <=15wt.% of propane (e.g. a mixture of 50-95wt.% of B1 , 5-50wt.% of B2 and <=15wt.% of B4 ) and, as necessary, (C) a radical chain terminator. |
