Hydraulic fluid composition for refrigeration machine oil and refrigerator

摘要

Problem to be solved: to provide a refrigerator oil excellent in compatibility with a predetermined amount of difluoromethane, pentafluoroethane, 2,3,3,3-tetrafluoropropene, and refrigerant containing 1,1,1,2-tetrafluoroethane.Contains at least one kind of oxygenated oil having a carbon / oxygen molar ratio of 2.5 or more to 5.8 or less as base oilBy the total amount of refrigerantDifluoromethane over 15 mass%Pentafluoroethane above 15 mass%2 mass% 15 or more333 - tetrafluoropropeneAnd 1112 - used with refrigerant containing tetrafluoroethaneFreezer oil.No selection