REFRIGERATING MACHINE WORKING FLUID COMPOSITION AND REFRIGERANT OIL

摘要

This refrigerating machine working fluid composition contains: a refrigerant that contains difluoromethane and an unsaturated fluorinated hydrocarbon, said difluoromethane and an unsaturated fluorinated hydrocarbon having a mass ratio of 95:5 to 10:90; and a refrigerant oil that contains at least one type of base oil selected from polyol ester, which has a carbon/oxygen molar ratio of 3.2 to 5.8, and from polyvinyl ether, which has a carbon/oxygen molar ratio of 3.2 to 5.8.