System and Method for Detecting a Refrigerant Leak in an HVAC System Using a Superheat Temperature

Abstract: a method operating an hvac system is provided. the method includes receiving a concentration of refrigerant. the method includes operating the hvac system in a leak diagnostic mode if the concentration exceeds a gas concentration threshold. the method includes turning on a compressor to compress the refrigerant. the method includes receiving a first suction temperature and a first saturated suction temperature, and determining a first super heat value based on the difference. the method includes turning off the compressor for a duration, and turning on the compressor after the duration has elapsed. the method includes receiving a second suction temperature and a second saturated suction temperature, and determining a second super heat value based on the difference. the method includes determining that the first refrigerant circuit includes a refrigerant leak if the second super heat value or the first super heat value exceeds a super heat threshold value.

Inventor(s): Sangameshwaran Sadhasivam, Vickey Bhardwaj, Patric Ananda Balan Thobias

CPC Classification: F24F11/36 (AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced ; vertical ducts for carrying away waste gases from buildings ; tops for chimneys or ventilating shafts, terminals for flues ))

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