Protection and diagnostic module for a refrigeration system
First Claim
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1. A system comprising:
- a compressor operable in a refrigeration circuit and including a motor;
a sensor producing a signal indicative of one of current and power drawn by said motor;
an ambient temperature sensor producing a signal indicative of an ambient temperature;
a liquid-line temperature sensor providing a signal indicative of a temperature of liquid circulating within said refrigeration circuit; and
processing circuitry processing said current or power signal to determine a condenser temperature of said refrigeration circuit and a subcooling value of said refrigeration circuit from said condenser temperature and said liquid-line temperature signal, said processing circuitry processing said current or power signal and said ambient temperature signal to determine a difference between said condenser temperature and said ambient temperature, said processing circuitry determining a system operating condition based on said subcooling value and said difference between said condenser temperature and said ambient temperature.
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Abstract
A system includes a compressor and a compressor motor functioning in a refrigeration circuit. A sensor produces a signal indicative of one of current and power drawn by the motor and a liquid-line temperature sensor provides a signal indicative of a temperature of liquid circulating within the refrigeration circuit. Processing circuitry processes the current or power signal to determine a condenser temperature of the refrigeration circuit and a subcooling value of the refrigeration circuit from the condenser temperature and the liquid-line temperature signal.
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Citations
22 Claims
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1. A system comprising:
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a compressor operable in a refrigeration circuit and including a motor; a sensor producing a signal indicative of one of current and power drawn by said motor; an ambient temperature sensor producing a signal indicative of an ambient temperature; a liquid-line temperature sensor providing a signal indicative of a temperature of liquid circulating within said refrigeration circuit; and processing circuitry processing said current or power signal to determine a condenser temperature of said refrigeration circuit and a subcooling value of said refrigeration circuit from said condenser temperature and said liquid-line temperature signal, said processing circuitry processing said current or power signal and said ambient temperature signal to determine a difference between said condenser temperature and said ambient temperature, said processing circuitry determining a system operating condition based on said subcooling value and said difference between said condenser temperature and said ambient temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification