Ammonia refrigerating machine, working fluid composition for...

C - Chemistry – Metallurgy – 09 – K

Patent

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C09K 5/04 (2006.01) C10M 107/34 (2006.01) C10M 129/18 (2006.01) C10M 171/00 (2006.01) F01M 9/12 (2006.01) F25B 9/00 (2006.01) F25B 31/00 (2006.01) F25B 1/10 (2006.01) F25B 39/02 (2006.01) F25B 40/00 (2006.01)

Patent

CA 2111196

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) R1-[-O-(PO)m-(EO)n-R2]x (I) wherein R1 is a hydrocarbon group having 1 to 6 carbon atoms, R2 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.

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