Greenblum & Bernstein, P.L.C.
Refrigerating machine oil, and working fluid composition for refrigerating machines
The present invention provides a refrigerating machine oil comprising a base oil; a sulfide compound; and an orthophosphoric acid ester, wherein a content of the sulfide compound is 0.01 to 2.0% by mass and a content of the orthophosphoric acid ester is 0.1 to 5.0% by mass, based on a total amount of the refrigerating machine oil, and the refrigerating machine oil having a kinematic viscosity at 40° C. of 3 to 500 mm2/s.
JXTG NIPPON OIL & ENERGY CORPORATION
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Hiroko Kuniko Masanori
Shimpo Adegawa Saito