REFRIGERATION MACHINE OIL FOR REFRIGERANT OR REFRIGERANT COMPOSITION, METHOD FOR USING REFRIGERATION MACHINE OIL, AND USE OF REFRIGERATION MACHINE OIL

摘要

Provided are: a refrigeration machine oil for a refrigerant composition, the refrigeration machine oil being capable of improving lubricity when performing refrigeration cycles using a refrigerant having a sufficiently low GWP; a method for using a refrigeration machine oil; and a use of the refrigeration machine oil as a refrigeration machine oil. Provided is a refrigeration machine oil for a refrigerant composition containing a refrigerant including trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf).