Refrigerator oil and working fluid composition for refrigerating machine
AssigneeNippon Oil Co., Ltd.
InventorsYuji SHIMOMURA, Katsuya TAKIGAWA
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Abstract
The refrigerator oil of the invention comprises an ester of a polyhydric alcohol and a fatty acid with a content of a C5-C9 fatty acid of 50-100% by mole, a content of a C5-C9 branched fatty acid of at least 30% by mole and a content of a C5 or lower straight-chain fatty acid of not greater than 40% by mole, and it is used with a fluoropropene refrigerant and/or trifluoroiodomethane refrigerant. The working fluid composition for a refrigerating machine according to the invention comprises the ester and a fluoropropene refrigerant and/or trifluoroiodomethane refrigerant.
Claims8
1-5. (canceled)
A working fluid composition for a refrigerating machine, comprising:
- a polyalkylene glycol represented by the following formula (1) and a fluoropropene refrigerant,
- R1—(OR3)n—OR2 (1)
- wherein R1 and R2 may be the same or different and each represents hydrogen, a C1-5 alkyl group or a C2-5 acyl group, R3 represents a C2-4 alkylene group, n represents the number of repeats of the oxyalkytene group represented by OR3, and the proportion of C2 alkylene groups for all of the R3 groups is no greater than 30 mol %, and
- wherein the polyalkylene glycol has a peroxide number of not greater than 10.0 meq/kg.
A refrigerator oil, comprising a polyalkylene glycol represented by the following formula (1), and being used together with a fluoropropene refrigerant,
- R1—(OR3)n—OR2 (1)
- wherein R1 and R2 may be the same or different and each represents hydrogen, a C1-C5 alkyl group or a C2-C5 acyl group, R3 represents a C2-C4 alkylene group, n represents the number of repeats of the oxyalkylene group represented by OR3, and the proportion of C2 alkylene groups for all of the R3 groups is no greater than 30 mol %, and wherein the polyalkylene glycol has a peroxide number of not greater than 10 meq/kg.
Dependencies are inferred from the claim text.