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AssigneesJapan Energy Corporation, Mayekawa Manufacturing Co., Ltd.
InventorsKeisuke Kasahara, Kuniaki Kawamura, Takashi Kaimai, Hisashi Yano
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The present invention provides a working fluid composition for a refrigerating machine obtained by mixing an ammonia refrigerant with a lubricating oil which is extremely excellent in solubility with the ammonia refrigerant, and a method for lubricating a refrigerating machine suitable for the use of the working fluid composition. The working fluid composition comprises a mixture of ammonia and one or more kinds of polyether compounds represented by the formula (I); the refrigerating machine is characterized by constituting a refrigerating cycle or a heat pump cycle through which the working fluid composition is circulated; and the method for lubricating a refrigerating compressor is characterized by lubricating the ammonia refrigerant compressor with the lubricating oil comprising one or more kinds of ether compounds represented by the formula (I) R.sub.1 ----O--(PO).sub.m --(EO).sub.n --R.sub.2 !.sub.x (I) wherein R.sub.1 is a hydrocarbon group having 1 to 6 carbon atoms, R.sub.2 is an alkyl group having 1 to 6 carbon atoms, PO is an oxypropylene group, EO is an oxyethylene group, x is an integer of from 1 to 4, m is a positive integer, and n is 0 or a positive integer.
A working fluid composition for a refrigerating compressor using ammonia as a refrigerant which comprises a mixture of ammonia and at least 2% by weight of one or more polyether compounds having an average molecular weight of 300 to 1,800, said polyether compounds being represented by the formula (I)
An ammonia refrigerating machine characterized by constituting a refrigerating cycle or a heat pump cycle containing a refrigerant compressor, a condenser, an expansion valve and an evaporator, ammonia and at least 2% by weight of one or more polyether compounds having an average molecular weight of 300 to 1,800, said polyether compounds being represented by the formula (I)
A method for lubricating a refrigerating compressor which is characterized by lubricating the ammonia refrigerant compressor with a lubricating oil comprising at least 2% by weight of one or more ether compounds having an average molecular weight of 300 to 1,800, said polyether compounds being represented by the formula (I)
Dependencies are inferred from the claim text.