Patent ID: 7323117

Claim:
A refrigerating oil composition, comprising: (A) a synthetic oil component having a pour point of −10° C. or lower comprising one or more polyalkylene glycol compounds represented by formula (1): R 1 —O-A-R 2 (1) wherein one of R 1 or R 2 is a hydrogen atom and the other one of R 1 or R 2 is an alkyl group having 1 to 4 carbon atoms, A is a copolymer of ethylene oxide and propylene oxide having a number of ethylene oxide units of m and a number of a propylene oxide units of n, wherein m and n satisfy the following relations: 0<m/n≦3, and 5≦m+n≦100; (B) a purified mineral oil component having a sulfur content of from 0.01 to 5.00% by weight comprising one or more sulfur components, wherein the weight ratio (A):(B) is in a range of 25:75 to 99:1 and an amount of the sulfur components derived from component (B) in the composition is in a range of 50 to 1,000 ppm; and (C) at least one compound selected from the group consisting of propane and butane, wherein the weight ratio {compound (C)}:{total weight of the composition} is from 99:1 to 10:90.