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US 5,848,538 AGranted
Oil and refrigerant pump for centrifugal chiller
AssigneeAmerican Standard Inc.
InventorJames C. Tischer
Life of this patent
Estimating the term…
Abstract
A single motor drives both oil and refrigerant pumps in a refrigeration chiller, the motor and oil pump being disposed in the chiller's oil supply tank and the refrigerant pump being disposed exterior thereof. The refrigerant pump pumps liquid refrigerant to the chiller's compressor section so as to cool the motor by which the compressor is driven while the oil pump pumps oil to chiller locations that require lubrication when the chiller is in operation.
Claims13
A refrigeration chiller comprising:
- a compressor;
- a motor for driving said compressor, said motor being disposed in a housing;
- a condenser for receiving refrigerant from said compressor;
- a metering device, said metering device receiving refrigerant from said condenser;
- an evaporator, said evaporator receiving refrigerant from said metering device and being connected for refrigerant flow to said compressor;
- a lubricant supply tank;
- and
- commonly driven means for pumping both lubricant from said lubricant supply tank to a location in said chiller that requires lubrication when said chiller is in operation and liquid refrigerant from said condenser to said motor so as to cool said motor when said chiller is in operation.
5 more elements
Dependencies are inferred from the claim text.