US 12,253,272 B1
Systems and methods for controlling indoor humidity
Youssef A. Jaber, Tyler, TX (US); Don A. Schuster, Lindale, TX (US); Nathan Smith, Tyler, TX (US); and Jonathan Edward Thrift, Jacksonville, TX (US)
Assigned to Trane International Inc., Davidson, NC (US)
Filed by Trane International Inc., Davidson, NC (US)
Filed on Jul. 11, 2019, as Appl. No. 16/509,240.
Int. Cl. F24F 11/30 (2018.01); F24F 3/14 (2006.01); F24F 11/86 (2018.01); F24F 110/20 (2018.01); F25B 49/02 (2006.01)
CPC F24F 11/30 (2018.01) [F24F 3/14 (2013.01); F24F 11/86 (2018.01); F24F 2110/20 (2018.01); F25B 49/02 (2013.01); F25B 49/022 (2013.01); F25B 2700/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of operating a climate control system that includes HVAC equipment configured to provide conditioned air to an indoor space, the HVAC equipment including an indoor fan and a controller, the controller being coupled to the indoor fan and at least one sensor arranged to detect a temperature of at least one of either a component of the HVAC equipment or current indoor conditions of the indoor space, the method comprising:
(a) determining a target dew point temperature based on desired indoor conditions for the indoor space;
(b1) determining an initial dew point temperature based on an initial set of indoor conditions of the indoor space;
(b2) determining an updated dew point temperature based on an updated set of indoor conditions of the indoor space;
(b3) determining a dew point error based on a difference between the target dew point temperature and the updated dew point temperature;
(c1) setting, during a cooling mode, a target coil temperature of a coil of an indoor heat exchanger of the climate control system below the target dew point temperature by an amount based on a difference between the target dew point temperature and the initial dew point temperature;
(c2) adjusting, during the cooling mode, the target coil temperature to an adjusted target coil temperature, in part, using a proportional and integral control loop that utilizes the dewpoint error as a feedback; and
(d) adjusting, during the cooling mode, a speed of air flowing across the coil and a speed of a compressor of the climate control system based on the adjusted target coil temperature, to reduce a difference between a coil temperature of the coil and the adjusted target coil temperature.