US5295357A
Expired / Lapsed
US
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Method for lubricating compression type refrigerating system
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1992-09-17
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Granted: 1994-03-22
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Expires: 2012-09-17
Abstract
Abstract A method of lubricating a compression type refrigerating system comprising a compressor, a condensor, an expansion valve or a capillary tube and an evaporator, involves the use of lubricants having a kinematic viscosity of 5 to 500 cSt at 40 degrees C. and an interfacial tension of 8 dyne/cm or above in combination with a mixed refrigerant comprising 1,1,1,2-tetrafluoroethane and 1,1-dichloro-2,2,2-trifluoroethane or chlorodifluoromethane as an essential component in the system.
Inventors
- 👤 Masato Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:04
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C10; C10M; C10M171/00; C10M171/02; C10M171/008; C09K2205/00; C09K2205/10; C09K2205/12; C09K2205/122; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
A method for lubricating a compression type refrigerating system comprising a compressor, a condensor, an expansion valve or a capillary tube and an evaporator, which method comprises using a mixed refrigerant comprising 40 to 95% by weight of 1,1,1,2-tetrafluoroethane and 60 to 5% by weight of 1,1-dichloro-2,2,2-trifluoroethane as the essential component, in combination with a hydrocarbon compound as a lubricant having a kinematic viscosity of 5 to 500 cSt at 40° C. and an interfacial tension of 20 dyne/cm or above in said system.
Claim 2
Independent Claim
84 words
A method for lubricating a compression type refrigerating system comprising a compressor, a condensor, an expansion valve or a capillary tube and an evaporator, which method comprises using a mixed refrigerant comprising 40 to 95% by weight of 1,1,1,2-tetrafluoroethane and 60 to 5% by weight of 1,1-dichloro-2,2,2-trifluoroethane as the essential component, in combination with a hydrocarbon compound as a lubricant having a kinematic viscosity of 5 to 500 cSt at 40° C. and an interfacial tension of 20 dyne/cm or above in said system.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein said lubricant is a mineral oil.
Claim 4
Dependent Claim
13 words
A method according to claim 1 wherein said lubricant is a synthetic oil.
Claim 5
Dependent Claim
26 words
A method according to claim 1 wherein said mixed refrigerant comprises 50 to 85% by weight of 1,1,1,2-tetrafluoroethane and 50 to 15% by weight of 1,1-dichloro-2,2,2-trifluoroethane.
Claim 6
Independent Claim
84 words
A method for lubricating a compression type refrigerating system comprising a compressor, a condensor, an expansion valve or a capillary tube and an evaporator, which method comprises using a mixed refrigerant comprising 70 to 5% by weight of 1,1,1,2-tetrafluoroethane and 30 to 95% by weight of chlorodifluoromethane as the essential component, in combination with a hydrocarbon compound as a lubricant having a kinematic viscosity of 5 to 500 cSt at 40° C. and an interfacial tension of 8 dyne/cm or above in said system.
Claim 7
Independent Claim
84 words
A method for lubricating a compression type refrigerating system comprising a compressor, a condensor, an expansion valve or a capillary tube and an evaporator, which method comprises using a mixed refrigerant comprising 70 to 5% by weight of 1,1,1,2-tetrafluoroethane and 30 to 95% by weight of chlorodifluoromethane as the essential component, in combination with a hydrocarbon compound as a lubricant having a kinematic viscosity of 5 to 500 cSt at 40° C. and an interfacial tension of 8 dyne/cm or above in said system.
Claim 8
Dependent Claim
13 words
A method according to claim 5 wherein said lubricant is a mineral oil.
Claim 9
Dependent Claim
13 words
A method according to claim 5 wherein said lubricant is a synthetic oil.
Claim 10
Dependent Claim
26 words
A method according to claim 5 wherein said mixed refrigerant comprises 50 to 10% by weight of 1,1,1,2-tetrafluoroethane and 50 to 90% by weight of chlorodifluoromethane.
Claim 11
Dependent Claim
38 words
A method according to claim 1, wherein the mixed refrigerant and the lubricant are in combination in a ratio of 50 to 95% by weight of the mixed refrigerant and 50 to 5% by weight of the lubricant.
Claim 12
Dependent Claim
38 words
A method according to claim 5, wherein the mixed refrigerant and the lubricant are in combination in a ratio of 50 to 95% by weight of the mixed refrigerant and 50 to 5% by weight of the lubricant.
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