Lubricating oil for refrigerator with compressor
AssigneeIdemitsu Kosan Co., Ltd.
InventorsYasuhiro Kawaguchi, Nobuaki Shimizu, Masato Kaneko, Hiroshi Nagakawa
Life of this patent
Estimating the term…
Abstract
Disclosed is a lubricating oil for compression-type refrigerator comprising, as a main component, a polyoxyalkyleneglycol derivative represented by the general formula: R1[(OR2)mOR3]n wherein symbols are as defined in the specification. Said lubricating oil has a favorable compatibility with refrigerants and an excellent lubricating property, and is utilized as the lubricating oil for compression-type refrigerator employing hydrogen-containing fluorocarbon compound refrigerants including R-134a or fluorocarbon compound refrigerants without hydrogen.
Claims4
A method for effecting lubrication in compression-type refrigerators using 1,1,1,2-tetrafluoroethane as a refrigerant which comprises employing, as a lubricant, a lubricating oil comprising, as a main component, a polyoxyalkyleneglycol derivative of ethyleneoxide-propyleneoxide copolymer represented by the general formula:
- R6—O—A—R7
- or the general formula:
- [CH2—O—A—R8
- CH—O—A—R9
- CH2—O—A—R10]
- wherein R6, R7, R8, R9 and R10 are each an alkyl group having 1 to 3 carbon atoms, A is a copolymerization chain of ethyleneoxide and propyleneoxide, consisting of p-times ethyleneoxide units and q-times propyleneoxide units and p and q are numbers satisfying the requirements:
- 0.1≦p/q≦10, 5≦p+q≦100.
A compression-type refrigerator system which comprises a compressor, a refrigerant comprising 1,1,1,2-tetrafluoroethane, and a lubricant, said lubricant comprising a lubricating oil which comprises, as a main component, a polyoxyalkyleneglycol derivative of ethyleneoxide-propyleneoxide copolymer represented by the general formula:
- R6—O—A—R7
- or the general formula:
- wherein R6, R7, R8, R9 and R10 are each an alkyl group having 1 to 3 carbon atoms, A is a copolymerization chain of ethyleneoxide and propyleneoxide consisting of p-times ethyleneoxide units and q-times propyleneoxide units and p and q are numbers satisfying the requirements:
- 0.1≦p/q≦10, 5≦p+q≦100.
Dependencies are inferred from the claim text.