Refrigeration monitoring system and method
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United States of America Patent
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Mar 12, 2013
Grant Date -
Mar 19, 2009
app pub date -
Mar 24, 2008
filing date -
Sep 19, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A system is provided and may include a compressor having a motor and a refrigeration circuit including an evaporator and a condenser fluidly coupled to the compressor. The system may further include a first sensor producing a signal indicative of one of current and power drawn by the motor, a second sensor producing a signal indicative of a saturated condensing temperature, and a third sensor producing a signal indicative of a liquid-line temperature. Processing circuitry may processes the current or power signal to determine a derived condenser temperature and may compare the derived condenser temperature to the saturated condensing temperature received from the second sensor to determine a subcooling associated with a refrigerant charge level of the refrigeration circuit.
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