System and method for monitoring compressor floodback
First Claim
1. A system comprising:
- a compressor connected to an evaporator;
a suction sensor that outputs a suction temperature signal corresponding to a suction temperature of refrigerant entering the compressor;
a control module connected to the suction sensor, said control module determining a saturated evaporator temperature based on a speed of the compressor, calculating a suction superheat temperature based on the saturated evaporator temperature and the suction temperature, monitoring a floodback condition of the compressor by comparing the suction superheat temperature with a predetermined threshold, and, when the suction superheat temperature is less than or equal to the predetermined threshold, increasing the speed of the compressor or decreasing an opening of an expansion valve associated with the compressor.
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Accused Products
Abstract
A system and method for a compressor includes a compressor connected to an evaporator, a suction sensor that outputs a suction temperature signal corresponding to a suction temperature of refrigerant entering the compressor, and a control module connected to the suction sensor. The control module determines a saturated evaporator temperature, calculates a suction superheat temperature based on the saturated evaporator temperature and the suction temperature, and monitors a floodback condition of the compressor by comparing the suction superheat temperature with a predetermined threshold. When the suction superheat temperature is less than or equal to the predetermined threshold, the control module increases a speed of the compressor or decreases an opening of an expansion valve associated with the compressor.
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Citations
18 Claims
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1. A system comprising:
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a compressor connected to an evaporator; a suction sensor that outputs a suction temperature signal corresponding to a suction temperature of refrigerant entering the compressor; a control module connected to the suction sensor, said control module determining a saturated evaporator temperature based on a speed of the compressor, calculating a suction superheat temperature based on the saturated evaporator temperature and the suction temperature, monitoring a floodback condition of the compressor by comparing the suction superheat temperature with a predetermined threshold, and, when the suction superheat temperature is less than or equal to the predetermined threshold, increasing the speed of the compressor or decreasing an opening of an expansion valve associated with the compressor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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determining, with a control module, a saturated evaporator temperature of an evaporator based on a speed of a compressor connected to the evaporator; receiving, with the control module, a suction temperature signal that corresponds to a suction temperature of refrigerant entering the compressor; calculating, with the control module, a suction superheat temperature based on the saturated evaporator temperature and the suction temperature; monitoring, with the control module, a floodback condition of the compressor by comparing the suction superheat with a predetermined threshold; and increasing the speed of the compressor or decreasing an opening of an expansion valve, with the control module, when the suction superheat temperature is less than or equal to the predetermined threshold. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification