US 12,339,027 B2
HVAC system operated with adaptive discharge air temperature setpoint
Rakesh Goel, Irving, TX (US); and Juan Antonio Contreras Lafaire, Frisco, TX (US)
Assigned to Lennox Industries Inc., Richardson, TX (US)
Filed by Lennox Industries Inc., Richardson, TX (US)
Filed on Dec. 18, 2023, as Appl. No. 18/544,112.
Application 18/544,112 is a continuation of application No. 17/930,162, filed on Sep. 7, 2022, granted, now 11,920,819.
Application 17/930,162 is a continuation of application No. 17/203,528, filed on Mar. 16, 2021, granted, now 11,486,599, issued on Nov. 1, 2022.
Prior Publication US 2024/0117988 A1, Apr. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F24F 11/86 (2018.01)
CPC F24F 11/86 (2018.01) 14 Claims
OG exemplary drawing
 
1. A heating, ventilation and air conditioning (HVAC) system, comprising:
a variable-speed compressor configured to compress a refrigerant flowing through the HVAC system;
an indoor air temperature sensor positioned and configured to measure an indoor air temperature (IAT) of an enclosed space; and
a controller communicatively coupled to the variable-speed compressor, the indoor air temperature sensor, and a discharge air temperature sensor, the controller comprising:
a memory configured to store an indoor temperature setpoint and a default discharge air temperature setpoint; and
a processor configured to:
receive the IAT;
determine, based on a difference between the received IAT and the indoor temperature setpoint, that the IAT is not within a threshold range of the indoor temperature setpoint;
after determining that the IAT is not within the threshold range of the indoor temperature setpoint, determine an adaptive discharge air temperature setpoint based on the default discharge air temperature setpoint and the difference between the received IAT and the indoor temperature setpoint;
determine a compressor speed at which to operate the variable-speed compressor based on the adaptive discharge air temperature setpoint; and
cause the variable-speed compressor to operate at the determined compressor speed.