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US 8,459,053 B2Granted
Variable speed compressor protection system and method
AssigneeEmerson Climate Technologies, Inc.
InventorsHung M. Pham, Stephen M. Seibel
Life of this patent
Estimating the term…
Abstract
A system and method for a compressor may include an inverter drive connected to the compressor that receives electric power and modulates a speed of the compressor by modulating a frequency of the electric power. A control module connected to the inverter drive monitors compressor power data and compressor speed data from the inverter drive, and calculates a saturated condenser temperature of a refrigeration system associated with the compressor based on the compressor power data and the compressor speed data.
Claims16
A system comprising:
- a compressor connected to an evaporator;
- a suction temperature sensor that outputs a suction temperature signal corresponding to a temperature of refrigerant entering said compressor;
- an inverter drive connected to said compressor that receives electric power and modulates a speed of said compressor by modulating a frequency of said electric power;
- a heat sink temperature sensor that outputs a heat sink temperature signal corresponding to a temperature of a heat sink associated with said inverter;
- a control module connected to said inverter drive that receives said suction temperature signal, that monitors compressor power data and compressor speed data from said inverter drive, that calculates a saturated evaporator temperature of a refrigeration system associated with said compressor and said evaporator based on said suction temperature signal, said heat sink temperature signal, said compressor power data, and said compressor speed data;
- and that generates at least one of a control signal and a notification signal based on said calculated saturated evaporator temperature.
3 more elements
A method comprising
- receiving a suction temperature signal from a suction temperature sensor, said suction temperature signal corresponding to a temperature of refrigerant entering a compressor, said compressor being connected to an evaporator;
- delivering electric power to said compressor with an inverter drive configured to modulate a speed of said compressor by modulating a frequency of said electric power;
- receiving a heat sink temperature signal from a heat sink temperature sensor, said heat sink temperature signal corresponding to a temperature of a heat sink associated with said inverter;
- monitoring compressor power data and compressor speed data from said inverter drive;
- calculating a saturated evaporator temperature of a refrigeration system associated with said compressor and said evaporator based on said suction temperature signal, said heat sink temperature signal, said compressor power data, and said compressor speed data;
- generating at least one of a control signal and a notification signal based on said calculated saturated evaporator temperature.
3 more elements
Dependencies are inferred from the claim text.