| 摘要 |
PURPOSE: To obtain a refrigerating oil composition having excellent chemical stability and hydrolysis stability, a long life, high volume resistivity, excellent leakage inhibiting property and improved reliability by comprising a non chlorine-based fluorine-containing refrigerant and a specific lubricating oil composition. CONSTITUTION: This composition is composed of (A) a non chlorine-based fluorine-containing refrigerant and (B) a lubricating oil composition comprising (i) an ester oil having a viscosity range of 10-500mm<2> /s at 40 deg.C and (ii) an aromatic carboxylic glycidyl ester expressed by the formula (R is a 6-14C aryl or alkylaryl; (n) is 1 or 2) and containing <=1.0wt.% chlorine concentration and added in an amount of 0.1-20 wt.% of the component (i). Preferably, the component (B) contains (iii) a phosphorus-based wear-inhibitor containing <=3ppm Na and/or K concentration in an amount of 0.05-5wt.% of the component (i). Preferably, in the component (B), chlorine component is <=300ppm, Na and/or K component is <=0.1ppm, total acid value is <=0.1mgKOH/g and water content is <=500ppm. |
