Variable speed compressor protection system and method
First Claim
1. A system comprising:
- a compressor connected to a condenser;
a discharge line temperature sensor that outputs a discharge line temperature signal corresponding to a discharge line temperature of refrigerant leaving the compressor;
a control module connected to the discharge line temperature sensor, said control module receiving compressor power data, determining a saturated condenser temperature as a function of the compressor power data and a speed of the compressor, calculating a discharge superheat temperature based on the saturated condenser temperature and the discharge line temperature, monitoring a flood back condition of the compressor by comparing the discharge superheat temperature with a predetermined threshold, and, when the discharge superheat temperature is less than or equal to the predetermined threshold, increasing the speed of the compressor.
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Accused Products
Abstract
A system and method for a compressor includes a compressor connected to a condenser, a discharge line temperature sensor that outputs a discharge line temperature signal corresponding to a discharge line temperature of refrigerant leaving the compressor, and a control module connected to the discharge line temperature sensor. The control module determines a saturated condenser temperature, calculates a discharge superheat temperature based on the saturated condenser temperature and the discharge line temperature, and monitors a flood back condition of the compressor by comparing the discharge superheat temperature with a predetermined threshold. The control module increases a speed of the compressor when the discharge superheat temperature is less than or equal to the predetermined threshold.
297 Citations
7 Claims
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1. A system comprising:
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a compressor connected to a condenser; a discharge line temperature sensor that outputs a discharge line temperature signal corresponding to a discharge line temperature of refrigerant leaving the compressor; a control module connected to the discharge line temperature sensor, said control module receiving compressor power data, determining a saturated condenser temperature as a function of the compressor power data and a speed of the compressor, calculating a discharge superheat temperature based on the saturated condenser temperature and the discharge line temperature, monitoring a flood back condition of the compressor by comparing the discharge superheat temperature with a predetermined threshold, and, when the discharge superheat temperature is less than or equal to the predetermined threshold, increasing the speed of the compressor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification