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US 10,295,232 B2Granted
Cooling system
AssigneeAktiebolaget Skf
InventorsRudolf Hauleitner, Mario Kammerhuber, Guillermo Morales Espejel, Hans Wallin
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Abstract
A cooling system includes a refrigerant compressor and a first operating medium, which includes a mixture of refrigerant and lubrication oil. An oil separator reduces the percentage of the refrigerant in the operating medium so that a second lubrication oil enriched operating medium is provided by the oil separator, the provided second operating medium having at least in a second operating state a viscosity ratio of κ>1.
Claims20
A cooling system, comprising:
- a refrigerant compressor, and
- an oil separator configured to separate a combined operating medium comprising a mixture of a refrigerant and a lubrication oil into a first operating medium and a second operating medium, wherein the oil separator reduces the percentage of the refrigerant in the combined operating medium to produce the second operating medium, so that the second operating medium is lubrication oil enriched in comparison to the combined operating medium and the first operating medium,
- wherein the second operating medium has a viscosity ratio of κ<1 in a first operating state of the cooling system and serves for lubricating at least one bearing site of a rotor of the refrigerant compressor,
- wherein the at least one bearing site comprises at least one angular ball bearing, which comprises an inner ring, an outer ring and balls rolling therebetween, and
- wherein the second operating medium has at least in a second operating state a viscosity ratio of κ>1 and serves for lubricating the at least one bearing site of the rotor.
2 more elements
A method, comprising:
- separating, using an oil separator, a combined operating medium comprising refrigerant and lubrication oil, to produce a first operating medium and a second operating medium, the second operating medium that is lubrication oil enriched as compared to the first operating medium and the combined operating medium;
- lubricating at least one bearing site of a refrigerant compressor using the second operating medium, wherein the second operating medium in the at least one bearing site has a viscosity ratio of x<1 when the refrigerant compressor is in a first operating state;
- compressing at least the first operating medium by operating the refrigerant compressor in the first operating state;
- mixing the first and second operating media to produce the combined operating media;
- and feeding the combined operating media to the oil separator.
2 more elements
Dependencies are inferred from the claim text.