US 11,747,053 B2
Reheat operation for heat pump system
Stephen Blake Pickle, Norman, OK (US); Kerry Lyman Shumway, Norman, OK (US); Thinh Huy Nguyen, Oklahoma City, OK (US); and Bradford Graham Briley, Norman, OK (US)
Assigned to JOHNSON CONTROLS TECHNOLOGY COMPANY, Auburn Hills, MI (US)
Filed by Johnson Controls Technology Company, Auburn Hills, MI (US)
Filed on Jun. 10, 2021, as Appl. No. 17/344,675.
Prior Publication US 2022/0397313 A1, Dec. 15, 2022
Int. Cl. F25B 13/00 (2006.01); F24F 3/00 (2006.01); F25B 30/02 (2006.01)
CPC F25B 13/00 (2013.01) [F24F 3/001 (2013.01); F25B 30/02 (2013.01); F25B 2313/027 (2013.01); F25B 2313/0292 (2013.01); F25B 2313/0316 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A heat pump system, comprising:
a refrigerant circuit comprising a compressor, a first heat exchanger, a second heat exchanger, a reheat heat exchanger, a modulating valve, and a reversing valve, wherein:
the reversing valve is configured to transition between a first configuration to direct refrigerant from the compressor toward the modulating valve and a second configuration to direct the refrigerant from the compressor toward the first heat exchanger;
the modulating valve is configured to adjust between a first position, a second position, and a plurality of intermediate positions between the first position and the second position;
the modulating valve is configured to direct a first portion of the refrigerant received from the reversing valve to the second heat exchanger and a second portion of the refrigerant received from the reversing valve to the reheat heat exchanger, in parallel with one another, in each intermediate position of the plurality of intermediate positions; and
control circuitry configured to control operation of the reversing valve and the modulating valve in a modulating reheat mode of the heat pump system, and, in the modulating reheat mode, the control circuitry is configured to maintain the reversing valve in the first configuration, such that the refrigerant is received at the modulating valve from the reversing valve, and to adjust a position of the modulating valve to adjust a first amount of the first portion of the refrigerant directed to the second heat exchanger and adjust a second amount of the second portion of the refrigerant directed to the reheat heat exchanger.