| abstract |
The working fluid composition for a refrigerator of the present invention comprises a first refrigerant component which is at least one selected from difluoromethane and tetrafluoropropene and a second refrigerant component which is at least one selected from carbon dioxide and hydrocarbons of 3 to 4 carbon atoms And at least one selected from a polyol ester, a polyvinyl ether and a polyalkylene glycol compound as a base oil, wherein the base oil has a carbon / oxygen molar ratio of 2.5 to 5.8, It contains refrigerator oil. |