Patent ID: 11982452

Abstract:
A condenser coil of a system includes a subcool sensor. The subcool sensor includes a first thermistor positioned to sense a saturated liquid temperature of refrigerant flowing in a first portion of the condenser coil. The subcool sensor includes a second thermistor positioned to sense a liquid temperature of the refrigerant flowing in a second portion of the condenser coil. The second thermistor is coupled electronically in series with the first thermistor. The subcool sensor includes a signal output for transmitting a subcool signal from the subcool sensor. The signal output is coupled electronically to a first terminal of the first thermistor and a second terminal of the second thermistor. A controller of the system includes an input/output interface which receives the subcool signal from the subcool sensor and determines a temperature difference between the saturated liquid temperature and the liquid temperature based on the subcool signal.