System and method for monitoring compressor floodback
First Claim
1. A system comprising:
- a compressor connected to a condenser;
a discharge sensor that outputs a discharge temperature signal corresponding to a discharge temperature of refrigerant from the compressor; and
a control module connected to the discharge sensor, said control module being configured to receive at least one of compressor power data and compressor current data, determine a saturated condensing temperature based on a speed of the compressor and at least one of the compressor power data and the compressor current data, calculate a discharge superheat temperature based on the saturated condensing temperature and the discharge temperature, monitor a floodback condition of the compressor by comparing the discharge superheat temperature with a threshold, and, when the discharge superheat temperature is less than or equal to the threshold, increase the speed of the compressor or decrease an opening of an expansion valve associated with the compressor.
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Accused Products
Abstract
A system and method for monitoring a floodback condition includes a compressor connected to a condenser, a discharge sensor that outputs a discharge temperature signal corresponding to a discharge temperature, and a control module connected to the discharge sensor. The control module receives compressor power data or compressor current data, determines a saturated condensing temperature based on the compressor power data or compressor current data, calculates a discharge superheat temperature based on the saturated condensing temperature and the discharge temperature, monitors a floodback condition of the compressor by comparing the discharge superheat temperature with a threshold, and, when the discharge superheat temperature is less than or equal to the threshold, increases the speed of the compressor or decreases an opening of an expansion valve associated with the compressor.
279 Citations
20 Claims
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1. A system comprising:
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a compressor connected to a condenser; a discharge sensor that outputs a discharge temperature signal corresponding to a discharge temperature of refrigerant from the compressor; and a control module connected to the discharge sensor, said control module being configured to receive at least one of compressor power data and compressor current data, determine a saturated condensing temperature based on a speed of the compressor and at least one of the compressor power data and the compressor current data, calculate a discharge superheat temperature based on the saturated condensing temperature and the discharge temperature, monitor a floodback condition of the compressor by comparing the discharge superheat temperature with a threshold, and, when the discharge superheat temperature is less than or equal to the threshold, increase the speed of the compressor or decrease an opening of an expansion valve associated with the compressor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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receiving, with a control module, at least one of compressor power data and compressor current data of a compressor connected to a condenser; outputting, with a discharge sensor, a discharge temperature signal corresponding to a discharge temperature of refrigerant from the compressor; receiving, with the control module, the discharge temperature signal from the discharge sensor; determining, with the control module, a saturated condensing temperature based on a speed of the compressor and at least one of the compressor power data and the compressor current data; calculating, with the control module, a discharge superheat temperature based on the saturated condensing temperature and the discharge temperature; monitoring, with the control module, a floodback condition of the compressor by comparing the discharge superheat temperature with a threshold; and increasing the speed of the compressor or decreasing an opening of an expansion valve, with the control module, when the discharge superheat temperature is less than or equal to the threshold. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification