| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a freezer oil composition enabling the lubricity and refrigerant compatibility of a freezer oil to coexist in the presence of a refrigerant, and to provide a working fluid composition for freezers. <P>SOLUTION: This freezer oil composition comprises a hydrocarbon oil and an oxygen-containing oil in amounts of 20 to 95 mass% and 5 to 80 mass% respectively, based on the total amount of the freezer oil composition and is used together with a hydrofluorocarbon refrigerant which has a dynamic viscosity of ≥20 mm<SP>2</SP>/s at 40°C and in which the number of fluorine atoms is less than the number of hydrogen atoms. The working fluid composition for freezers comprises the freezer oil composition and a hydrofluorocarbon refrigerant in which the number of fluorine atoms is less than the number of hydrogen atoms. <P>COPYRIGHT: (C)2009,JPO&INPIT |
