WORKING FLUID COMPOSITION FOR REFRIGERATOR

摘要

The working fluid composition for a refrigerating machine of the present invention comprises a refrigerant comprising monofluoroethane, and a refrigerating machine oil comprising at least one selected from a polyol ester, a polyvinyl ether and a polyalkylene glycol compound as a base oil, wherein a carbon/oxygen molar ratio of the base oil is 2.5 or more and 5.8 or less.