A REFRIGERATOR OIL AND WORKING FLUID COMPOSITION FOR A REFRIGERATOR COMPRISING AN ESTER AND A FLUOROPROPRENE AND/OR TRIFLUOROIODOMETHANE REFRIGERANT

摘要

The refrigerating machine oil of the invention is characterized bycomprising an ester of a polyhydric alcohol and a fatty acid with a C5-C9fatty acid content of 50-100 mol%, a C5-C9 branched fatty acid contentof at least 30 mol% and a C5 or lower straight-chain fatty acid content ofno greater than 40 mol%, and by being used with a fluoropropenerefrigerant and/or a trifluoroiodomethane refrigerant. The workingfluid composition for a refrigerating machine according to the inventioncomprises the ester and a fluoropropene refrigerant and/or atrifluoroiodomethane refrigerant.