US 11,054,160 B2
Simultaneous heating and cooling of multiple zones
Rajendra K. Shah, Indianapolis, IN (US); and Bradley D. Powell, Greenwood, IN (US)
Assigned to CARRIER CORPORATION, Palm Beach Gardens, FL (US)
Filed by Carrier Corporation, Jupiter, FL (US)
Filed on Jun. 30, 2016, as Appl. No. 15/197,883.
Claims priority of provisional application 62/187,556, filed on Jul. 1, 2015.
Prior Publication US 2017/0003044 A1, Jan. 5, 2017
Int. Cl. F24F 11/30 (2018.01); F24F 11/62 (2018.01); F24F 11/65 (2018.01); F24F 11/61 (2018.01)
CPC F24F 11/30 (2018.01) [F24F 11/62 (2018.01); F24F 11/61 (2018.01); F24F 11/65 (2018.01); F24F 2221/54 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of operating a heating, ventilation and air conditioning (HVAC) system comprising:
determining a first heating or cooling demand for a first zone of a space;
determining a second heating or cooling demand for a second zone of the space;
determining that the first demand requires operation of the HVAC system in a first mode, and that the second demand requires operation of the HVAC system in a second mode opposite the first mode, wherein the second demand is simultaneous to the first demand; and
operating a simultaneous heat/cool algorithm for a predetermined time duration to alternatingly operate the HVAC system in the first mode for a first time portion of the predetermined time duration to condition the first zone and the second mode for a second time portion of the predetermined time duration to condition the second zone;
wherein a relative duration of operation in the first mode and operation in the second mode is determined based on the first heating or cooling demand and a first heating or cooling capacity compared to the second heating or cooling demand and a second heating or cooling capacity;
wherein the first time portion plus the second time portion sums to the predetermined time duration.