Method for lubricating compression type refrigerating system
AssigneeIdemitsu Kosan Co., Ltd.
InventorMasato Kaneko
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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.degree. 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.
Claims10
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.degree. C. and an interfacial tension of 20 dyne/cm or above in said system.
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.degree. C. and an interfacial tension of 8 dyne/cm or above in said system.
Dependencies are inferred from the claim text.