| 摘要 |
A system is provided and may inclue a compressor (10) having a motor (32) and a refrigeration circuit (12) including an evaporator (72) and a condenser (70) fluidly coupled to the compressor. The system may further include a first sensor (80) producing a signal indicative of one of current and power drawn by the motor, a second sensor (110) producing a signal indicative of a saturated condensing temperature, and a third sensor (84) producing a signal indicative of a liquid-line temperature. Processing circuitry (88) 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. |
