WORKING FLUID COMPOSITION FOR REFRIGERATOR

摘要

This working fluid composition for a refrigerator contains: a refrigerant containing a first refrigerant component being at least one type selected from difluoromethane and tetrafluoropropene and a second refrigerant component being at least one type selected from carbon dioxide and a C3-4 hydrocarbon and having a global warming potential of no more than 500; and a refrigerant oil containing as a base oil at least one type selected from polyol ester polyvinyl ether and a polyalkylene glycol compound said base oil having a carbon/oxygen molar ratio of 2.5-5.8.