US 11,768,020 B2
Systems and methods for reheat control of an HVAC system
John T. Knight, Moore, OK (US); Stephen B. Pickle, Norman, OK (US); Norman J. Blanton, Norman, OK (US); and Kerry L Shumway, Norman, OK (US)
Assigned to Johnson Controls Tyco IP Holdings LLP, Milwaukee, WI (US)
Filed by Johnson Controls Tyco IP Holdings LLP, Milwaukee, WI (US)
Filed on Aug. 22, 2022, as Appl. No. 17/892,956.
Application 17/892,956 is a continuation of application No. 16/513,499, filed on Jul. 16, 2019, granted, now 11,421,923.
Claims priority of provisional application 62/851,516, filed on May 22, 2019.
Prior Publication US 2023/0087675 A1, Mar. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F25B 41/20 (2021.01); F24F 3/052 (2006.01); F24F 3/153 (2006.01); F24F 11/84 (2018.01)
CPC F25B 41/20 (2021.01) [F24F 3/0525 (2013.01); F24F 3/153 (2013.01); F24F 11/84 (2018.01); F25B 2600/25 (2013.01); F25B 2700/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A heating, ventilation, and/or air conditioning (HVAC) system comprising a controller configured to:
receive, from a first sensor, first feedback indicative of a first temperature of an air flow received by the HVAC system as return air;
receive, from a second sensor, second feedback indicative of a second temperature of the air flow output by the HVAC system as supply air; and
control a modulating reheat valve of the HVAC system to adjust flow of a working fluid to a reheat coil in thermal communication with the air flow, wherein, to control the modulating reheat valve, the controller is configured to:
instruct the modulating reheat valve to increase a flow rate of the working fluid to the reheat coil in response to a first determination that the second temperature is below the first temperature by a non-zero threshold amount; or
instruct the modulating reheat valve to decrease the flow rate of the working fluid to the reheat coil in response to a second determination that the second temperature is above the first temperature by the non-zero threshold amount; or
both.