Refrigerating-machine oil and working-fluid composition for refrigerating machine
The invention provides a refrigerating machine oil comprising a hydrocarbon-based base oil, the refrigerating machine oil having a viscosity index of 120 or less, and being used with a 1-chloro-3,3,3-trifluoropropene refrigerant.
1. A working fluid composition for a refrigerating machine, comprising:
a refrigerating machine oil comprising a hydrocarbon-based base oil, the refrigerating machine oil having a viscosity index of 120 or less, and a 1-chloro-3,3,3-trifluoropropene refrigerant, wherein
the content of the hydrocarbon-based base oil is 80 mass % or more based on the total amount of the refrigerating machine oil;
wherein a % C P of the hydrocarbon-based base oil is 63 or more and 90 or less.
2. The working fluid composition for a refrigerating machine according to claim 1 , wherein the hydrocarbon-based base oil has a viscosity index of 120 or less.
3. The working fluid composition for a refrigerating machine according to claim 1 , wherein the hydrocarbon-based base oil has a % C N of 10 or more and 75 or less.
4. The working fluid composition for a refrigerating machine according to claim 1 , wherein the 1-chloro-3,3,3-trifluoropropene refrigerant is a trans-1-chloro-3,3,3-trifluoropropene refrigerant.
5. The working fluid composition for a refrigerating machine according to claim 1 , wherein the % C A of the hydrocarbon-based base oil is 10 or less.
6. The working fluid composition for a refrigerating machine according to claim 1 , wherein the hydrocarbon-based base oil is obtained from a paraffinic crude oil.
7. The working fluid composition for a refrigerating machine according to claim 1 , wherein the % C P is 80 or less.
8. The working fluid composition for a refrigerating machine according to claim 1 , wherein the refrigerating machine oil has a viscosity index of 58 to 120.