Refrigerator oil composition and refrigerator
View Patent ↗The present invention provides a refrigerating machine oil composition comprising an ester-based base oil, an epoxy compound, and a carbodiimide compound, the refrigerating machine oil composition being used with a refrigerant containing a fluoropropene in a refrigerating machine comprising a member containing polyethylene terephthalate and/or a member containing hydrogenated acrylonitrile butadiene rubber.
1. A refrigerating machine oil composition comprising:
an ester-based base oil;
at least 0.1% by mass, based on the total amount of the refrigerating machine oil composition, of an epoxy compound which is a glycidyl ether-type epoxy compound, glycidyl ester-type epoxy compound, oxirane compound, or alicyclic epoxy compound; and
at least 0.01% by mass, based on the total amount of the refrigerating machine oil composition, of a carbodiimide compound.
2. The refrigerating machine oil composition according to claim 1 , wherein the ester-based base oil comprises an ester of pentaerythritol and a monocarboxylic fatty acid and/or an ester of dipentaerythritol and a monocarboxylic fatty acid.
3. The refrigerating machine oil composition according to claim 1 , wherein the ester-based base oil comprises an ester of pentaerythritol and a mixture of two or more monocarboxylic fatty acids and/or an ester of dipentaerythritol and a mixture of two or more monocarboxylic fatty acids.
4. The refrigerating machine oil composition according to claim 3 , wherein the epoxy compound is glycidyl neodecanoate or 2-ethylhexyl glycidyl ether, and the carbodiimide compound is bis(diisopropylphenyl)carbodiimide or diisopropylcarbodiimide, the content of the epoxy compound is 0.1% by mass or more and 4.5% by mass or less based on the total amount of the refrigerating machine oil composition, and the content of the carbodiimide compound is 0.01% by mass or more and 1% by mass or less based on the total amount of the refrigerating machine oil composition.
5. The refrigerating machine oil composition according to claim 1 , wherein the epoxy compound is a glycidyl ether-type epoxy compound, or a glycidyl ester-type epoxy compound.
6. The refrigerating machine oil composition according to claim 5 , wherein the glycidyl ether-type epoxy compound is represented by the following formula (2):
wherein R 2 represents an aryl group or an alkyl group having 5 to 18 carbon atoms.
7. The refrigerating machine oil composition according to claim 5 , wherein the glycidyl ester-type epoxy compound is represented by the following formula (3):
wherein R 3 represents an aryl group, an alkyl group having 5 to 18 carbon atoms, or an alkenyl group.
8. The refrigerating machine oil composition according to claim 1 , wherein the content of the epoxy compound is 0.1% by mass or more and 4.5% by mass or less based on the total amount of the refrigerating machine oil composition.
9. The refrigerating machine oil composition according to claim 1 , wherein the carbodiimide compound is selected from the group consisting of dialkylcarbodiimides and bis(alkylphenyl)carbodiimides.
10. The refrigerating machine oil composition according to claim 1 , wherein the content of the carbodiimide compound is 0.01% by mass or more and 1% by mass or less based on the total amount of the refrigerating machine oil composition.
11. A refrigerating machine comprising a refrigerant circulation system containing a compressor, a condenser, an expansion mechanism, and an evaporator,
the refrigerant circulation system comprising a member containing polyethylene terephthalate and/or a member containing hydrogenated acrylonitrile butadiene rubber, and
the refrigerant circulation system being filled with
a refrigerating machine oil composition comprising
an ester-based base oil,
at least 0.1% by mass, based on the total amount of the refrigerating machine oil composition, of an epoxy compound which is a glycidyl ether-type epoxy compound, glycidyl ester-type epoxy compound, oxirane compound, or alicyclic epoxy compound, and
at least 0.01% by mass, based on the total amount of the refrigerating machine oil composition, of a carbodiimide compound, and
a refrigerant containing a fluoropropene.
12. The refrigerating machine according to claim 11 , wherein the epoxy compound is a glycidyl ether-type epoxy compound, or a glycidyl ester-type epoxy compound.
13. The refrigerating machine according to claim 12 , wherein the glycidyl ether-type epoxy compound is represented by the following formula (2):
wherein R 2 represents an aryl group or an alkyl group having 5 to 18 carbon atoms.
14. The refrigerating machine according to claim 12 , wherein the glycidyl ester-type epoxy compound is represented by the following formula (3):
wherein R 3 represents an aryl group, an alkyl group having 5 to 18 carbon atoms, or an alkenyl group.
15. The refrigerating machine according to claim 11 , wherein the content of the epoxy compound is 0.1% by mass or more and 4.5% by mass or less based on the total amount of the refrigerating machine oil composition.
16. The refrigerating machine according to claim 11 , wherein the carbodiimide compound is selected from the group consisting of dialkylcarbodiimides and bis(alkylphenyl)carbodiimides.
17. The refrigerating machine according to claim 11 , wherein the content of the carbodiimide compound is 0.01% by mass or more and 1% by mass or less based on the total amount of the refrigerating machine oil composition.
18. The refrigerating machine according to claim 11 , wherein the refrigerant circulation system comprises the member containing hydrogenated acrylonitrile butadiene rubber.
19. The refrigerating machine according to claim 11 , wherein the refrigerant circulation system comprising the member containing polyethylene terephthalate and the member containing hydrogenated acrylonitrile butadiene rubber.
20. The refrigerating machine according to claim 11 , wherein the ester-based base oil comprises an ester of pentaerythritol and a mixture of two or more monocarboxylic fatty acids and/or an ester of dipentaerythritol and a mixture of two or more monocarboxylic fatty acids, the epoxy compound is glycidyl neodecanoate or 2-ethylhexyl glycidyl ether, and the carbodiimide compound is bis(diisopropylphenyl)carbodiimide or diisopropylcarbodiimide, the content of the epoxy compound is 0.1% by mass or more and 4.5% by mass or less based on the total amount of the refrigerating machine oil composition, and the content of the carbodiimide compound is 0.01% by mass or more and 1% by mass or less based on the total amount of the refrigerating machine oil composition.