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US 6,032,472 AGranted
Motor cooling in a refrigeration system
AssigneeCarrier Corporation
InventorsAnton D. Heinrichs, Stanley R. Grant
Life of this patent
Estimating the term…
Abstract
The expanded flow through a heat exchanger type economizer is controlled by an electronic expansion valve and is supplied to the motor of a motor compressor to cool the motor. The electronic expansion valve is controlled by a microprocessor responsive to the temperature of the motor winding sensed by a thermistor.
Claims4
A closed refrigeration system serially including a motor-compressor, a discharge line, a condenser, a heat exchanger economizer, an expansion device, an evaporator and a suction line, and temperature control means comprising:
- means for sensing a parameter representative of operating temperature of said motor;
- means for supplying an expanded flow through said economizer to said motor of said motor-compressor for cooling said motor;
- means for controlling said means for supplying an expanded refrigerant flow responsive to said means for sensing.
Dependencies are inferred from the claim text.