The present invention provides a refrigerating machine oil composition for use in a compressor for a refrigerator in which a sliding surface of at least a part of constitutional members of the compressor is coated with a lubrication film-forming composition containing a resin having a heat distortio
The present invention provides a refrigerating machine oil composition for use in a compressor for a refrigerator in which a sliding surface of at least a part of constitutional members of the compressor is coated with a lubrication film-forming composition containing a resin having a heat distortion temperature of 100° C. or higher as a binder, and a solid lubricant, wherein the refrigerating machine oil composition contains a base oil made of a polyoxyalkylene glycol having a kinematic viscosity of from 3 to 50 mm2/s as measured at 100° C., and a compound selected from the group consisting of amide compounds, amidated amino acid compounds and aliphatic amines having a specific structural formula which compound is contained in an amount of from 0.01 to 1% by mass on the basis of a total amount of the refrigerating machine oil composition, the refrigerating machine oil composition being capable of ensuring a good lubrication of sliding portions of the compressor upon starting operation of the compressor and during the operation; a compressor using the refrigerating machine oil composition; and a refrigerating apparatus including the compressor.
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1. A compressor containing a refrigerating machine oil comprising: a base oil made of a polyoxyalkylene glycol having a kinematic viscosity of from 3 to 50 mm2/s as measured at 100° C., andat least one compound selected from the group consisting of a compound of formula (1) and a compound of formula
1. A compressor containing a refrigerating machine oil comprising: a base oil made of a polyoxyalkylene glycol having a kinematic viscosity of from 3 to 50 mm2/s as measured at 100° C., andat least one compound selected from the group consisting of a compound of formula (1) and a compound of formula (2) which is contained in an amount of from 0.01 to 1% by mass on the basis of a total amount of the refrigerating machine oil;wherein compounds of formulas (1) and (2) are described below: R1—CO—NR2R3 (1),wherein R1 is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms; and R2 and R3 are each independently a hydrogen atom, a hydrocarbon group having 1 to 10 carbon atoms, a nitrogen-containing hydrocarbon group having 1 to 10 carbon atoms or an oxygen-containing hydrocarbon group having 1 to 10 carbon atoms; and R4—CO—NR5—R6—COO—X (2)wherein R4 is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms; R5 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; R6 is an alkylene group having 1 to 8 carbon atoms; and X is a hydrogen atom, an alkali metal atom, a hydrocarbon group having 1 to 30 carbon atoms, a nitrogen-containing hydrocarbon group having 1 to 30 carbon atoms or an oxygen-containing hydrocarbon group having 1 to 30 carbon atoms;wherein a sliding surface of at least part of constitutional member(s) of the compressor is coated with a lubrication film containing a nitrogen-containing resin as a binder and a solid lubricant. 2. The compressor according to claim 1, wherein the binder in the lubrication film is a resin containing at least one compound selected from the group consisting of polyamide imides, polyimides and polybenzazoles. 3. The compressor according to claim 1, wherein the compressor is of a type in which carbon dioxide as a refrigerant is compressed. 4. The compressor according to claim 1, wherein the constitutional member of the compressor is at least one member selected from the group consisting of a swash plate, a piston and a shoe. 5. The compressor of claim 1, wherein said at least one compound selected from the group consisting of a compound of formula (1) and a compound of formula (2) is a compound of formula (2). 6. The compressor of claim 5, wherein the compound of formula (2) is oleyl sarcosine or a salt thereof. 7. The compressor of claim 1, wherein said constitutional member is at least one swash plate, piston or shoe. 8. The compressor of claim 1, wherein said nitrogen-containing resin as a binder comprises a polyimide, polyamide imide, or polybenzazole. 9. The compressor of claim 1, wherein said solid lubricant comprises graphite, molybdenum disulfide, tungsten sulfide, fluororesin, or boron nitride. 10. The compressor of claim 1, wherein a sliding surface of at least part of constitutional member(s) of the compressor is coated with a lubrication film containing a nitrogen-containing resin as a binder ranging in thickness from 2 μm to 50 μm and a solid lubricant. 11. A refrigerating apparatus comprising a refrigerating circuit constituted from a compressor, a radiator, an expansion mechanism and an evaporator, in which carbon dioxide as a refrigerant is circulated through the refrigerating circuit, wherein the compressor contains a refrigerating oil composition comprising a base oil made of a polyoxyalkylene glycol having a kinematic viscosity of from 3 to 50 mm2/s as measured at 100° C., and at least one compound selected from the group consisting of a compound of formula (1) and a compound of formula (2) which is contained in an amount of from 0.01 to 1% by mass on the basis of a total amount of the refrigerating machine oil composition; wherein compounds of formulas (1) and (2) are described below: R1—CO—NR2R3 (1)wherein R1 is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms; and R2 and R3 are each independently a hydrogen atom, a hydrocarbon group having 1 to 10 carbon atoms, a nitrogen-containing hydrocarbon group having 1 to 10 carbon atoms or an oxygen-containing hydrocarbon group having 1 to 10 carbon atoms; R4—CO—NR5—R6—COO—X (2)wherein R4 is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms; R5 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; R6 is an alkylene group having 1 to 8 carbon atoms; and X is a hydrogen atom, an alkali metal atom, a hydrocarbon group having 1 to 30 carbon atoms, a nitrogen-containing hydrocarbon group having 1 to 30 carbon atoms or an oxygen-containing hydrocarbon group having 1 to 30 carbon atoms; andwherein a sliding portion of at least part of constitutional member(s) of the compressor is coated with a lubrication film containing a nitrogen-containing resin as a binder and a solid lubricant. 12. The refrigerating apparatus of claim 11, wherein said at least one compound selected from the group consisting of a compound of formula (1) and a compound of formula (2) is a compound of formula (2). 13. The refrigerating apparatus of claim 12, wherein the compound of formula (2) is oleyl sarcosine or a salt thereof. 14. The refrigerating apparatus of claim 11, wherein said constitutional member is at least one swash plate, piston or shoe. 15. The refrigerating apparatus of claim 11, wherein said nitrogen-containing resin as a binder comprises a polyimide, polyamide imide, or polybenzazole. 16. The refrigerating apparatus of claim 11, wherein said solid lubricant comprises graphite, molybdenum disulfide, tungsten sulfide, fluororesin, or boron nitride. 17. The refrigerating apparatus of claim 11, wherein a sliding surface of at least part of constitutional member(s) of the compressor is coated with a lubrication film containing a nitrogen-containing resin as a binder ranging in thickness from 2 μm to 50 μm and a solid lubricant.
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이 특허에 인용된 특허 (2)
Tazaki, Toshinori, Refrigerating machine oil composition for a carbon dioxide refrigerant.
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