US 11,767,999 B2
System and method for monitoring charge level of HVAC system
Tyler P. McCune, El Dorado, KS (US); Shawn A. Hern, Derby, KS (US); Aneek M. Noor, Wichita, KS (US); Cody J. Kaiser, Wichita, KS (US); and Drew H. Carlton, Wichita, KS (US)
Assigned to Johnson Controls Tyco IP Holdings LLP, Milwaukee, WI (US)
Filed by Johnson Controls Technology Company, Auburn Hills, MI (US)
Filed on Nov. 12, 2019, as Appl. No. 16/681,576.
Prior Publication US 2021/0140661 A1, May 13, 2021
Int. Cl. F24F 11/32 (2018.01); F24F 11/63 (2018.01)
CPC F24F 11/32 (2018.01) [F24F 11/63 (2018.01)] 22 Claims
OG exemplary drawing
 
1. A heating, ventilation, and/or air conditioning (HVAC) system, comprising:
a sensor configured to detect an operating parameter of the HVAC system;
a processor; and
a memory including instructions executable by the processor to cause the processor, during a normal operation mode of the HVAC system, to iteratively:
receive feedback from the sensor indicative of a value of the operating parameter;
compare the value with a reference data point;
determine a refrigerant charge level of the HVAC system based on the value and the reference data point; and
update the reference data point to an updated reference data point based on comparing the value with the reference data point.