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US 6,454,960 B1Granted
Refrigerator using a polyvinyl ether refrigerator oil
AssigneeSanyo Electric Co., Ltd.
InventorsTakashi Sunaga, Masato Watanabe
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AssigneeSanyo Electric Co., Ltd.
InventorsTakashi Sunaga, Masato Watanabe
Estimating the term…
An object of the present invention is to obtain a good refrigerator using polyvinyl ether oil as a refrigerator oil, which is compatible with a hydrofluorocarbon type refrigerant not containing chlorine (such as R134a) without suffering conventional problems. A refrigerator of the present invention comprises a refrigerating cycle using a hydrofluorocarbon type refrigerant not containing chlorine or a refrigerant mixture thereof, with a refrigerator oil compatible with the refrigerant sealed, wherein the refrigerator oil comprises a polyvinyl ether type compound having a structural unit represented by the general formula (1) as the main component, with a pour point of −40° C. or less, a two-liquid separation temperature of −20° C. or less, a total acid number of 0.02 mgKOH/g or less, a viscosity of 8 to 100 cst at 40° C. or less, and a viscosity index of 80 or more, wherein n is an integral number in the range of 1 or more, R1 to R3 are each a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms and may be the same or different, R4 is an alkyl group having 1 to 4 carbon atoms, and units in which R4 is an alkyl group having 1 to 2 carbon atoms are 40 to 100% and units in which R4 is an alkyl group having 3 to 4 carbon atoms are 0 to 60%.
A refrigerator comprising a compressor unit sealed in a hermetically sealed container, with an hydrofluorocarbon refrigerant or a refrigerant mixture thereof and a refrigerator oil compatible with the refrigerant unit sealed in the hermetically sealed container, wherein the refrigerator oil comprises a polyvinyl ether compound having a structural unit represented by the general formula (1) as the main component, with a pour point of −40° C. or less, a two-liquid separation temperature of −20° C. or less, a total acid number of 0.02 mgKOH/g or less, a viscosity of 8 to 100 cst at 40° C. or less, and a viscosity index of 80 or more,
A refrigerator comprising a refrigerant compressor, a condenser, an expansion device, and an evaporator, connected to each other with pipes, with an HFC type refrigerant or a refrigerant mixture thereof and a refrigerator oil compatible with the refrigerant sealed in a hermetically sealed container, wherein the refrigerator oil comprises a polyvinyl ether compound having a structural unit represented by the general formula (1) as the main component, with a pour point of −40° C. or less, a two liquid separation temperature of −20° C. or less, a total acid number of 0.02 mgKOH/g or less, a viscosity of 8 to 100 cst at 40° C. or less, and a viscosity index of 80 or more,
Dependencies are inferred from the claim text.