US 12,013,140 B2
System and method for modulating hot gas reheat utilizing multiple compressor systems
Stephen B. Pickle, Norman, OK (US); and John T. Knight, Moore, OK (US)
Assigned to JOHNSON CONTROLS TYCO IP HOLDNGS LLP, Milwaukee, WI (US)
Filed by Johnson Controls Tyco IP Holdings LLP, Milwaukee, WI (US)
Filed on Sep. 13, 2022, as Appl. No. 17/943,454.
Application 17/943,454 is a continuation of application No. 16/451,916, filed on Jun. 25, 2019, granted, now 11,473,809.
Claims priority of provisional application 62/808,503, filed on Feb. 21, 2019.
Prior Publication US 2023/0003415 A1, Jan. 5, 2023
Int. Cl. F24F 11/30 (2018.01); F24F 3/044 (2006.01); F24F 3/153 (2006.01); F24F 5/00 (2006.01); F24F 11/00 (2018.01); F24F 11/54 (2018.01); F24F 11/56 (2018.01); F24F 11/86 (2018.01); F25B 5/02 (2006.01); F25B 6/02 (2006.01); F25B 41/20 (2021.01)
CPC F24F 11/86 (2018.01) [F24F 3/044 (2013.01); F24F 3/153 (2013.01); F24F 5/001 (2013.01); F24F 11/0008 (2013.01); F24F 11/30 (2018.01); F24F 11/54 (2018.01); F24F 11/56 (2018.01); F25B 5/02 (2013.01); F25B 6/02 (2013.01); F25B 41/20 (2021.01)] 20 Claims
OG exemplary drawing
 
19. A system for modulating hot gas reheat operation of a heating, ventilation, and/or air conditioning (HVAC) system, wherein the HVAC system is configured to regulate air provided to a plurality of zones, the system comprising:
a plurality of compressors; and
a multi-directional reheat valve; and
wherein in response to a call for dehumidification in the absence of a call for cooling, the plurality of compressors are configured to be sequentially energized with a first compressor of the plurality of compressors energized in a reheat mode, a second compressor of the plurality of compressors energized in a cooling mode, a third compressor of the plurality of compressors energized in a reheat mode initially at full capacity, and a fourth compressor of the plurality of compressors energized in a cooling mode, and wherein, when the third compressor is energized in the reheat mode initially at full capacity and when a temperature of supply air is not at a neutral temperature, the multi-directional reheat valve is configured to adjust a capacity of the reheat mode of the third compressor in response to a modulating signal.