REFRIGERANT-OIL COMPOSITION AND COOLING-EQUIPMENT WORKING-FLUID COMPOSITION

摘要

The present invention provides a refrigerating machine oil composition comprising: a lubricating base oil; a compound represented by the following formula (1): [R 1 and R 2 may be the same as or different from each other and each represents a hydrocarbon group; m, n, p and q may be the same as or different from each other and each represents an integer from 0 to 5 so that sums of m + n and p + q range from 0 to 5, respectively, with the proviso that at least either one of n or q is 1 or more; and t and u may be the same as or different from each other and each represents an integer from 0 to 10]; and a phosphorus compound, the refrigerating machine composition being used with an unsaturated hydrofluorocarbon refrigerant.