US 11,719,457 B2
HVAC system and method for determining a temperature offset between a discharged air temperature and an indoor temperature
Payam Delgoshaei, Addison, TX (US); and Glenn W. Kowald, Carrollton, TX (US)
Assigned to Lennox Industries Inc., Richardson, TX (US)
Filed by Lennox Industries Inc., Richardson, TX (US)
Filed on Aug. 13, 2021, as Appl. No. 17/401,546.
Application 17/401,546 is a continuation of application No. 16/847,015, filed on Apr. 13, 2020, granted, now 11,143,425.
Prior Publication US 2021/0372651 A1, Dec. 2, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. F24F 11/64 (2018.01); F24F 11/81 (2018.01); F24F 11/38 (2018.01); F24F 110/12 (2018.01); F24F 110/30 (2018.01)
CPC F24F 11/64 (2018.01) [F24F 11/38 (2018.01); F24F 11/81 (2018.01); F24F 2110/12 (2018.01); F24F 2110/30 (2018.01)] 20 Claims
OG exemplary drawing
 
1. A heating, ventilation, and air conditioning (HVAC) system, the HVAC system comprising:
a blower configured to provide a flow of air through at least one air duct and into a conditioned space;
a temperature sensor configured to measure a discharge air temperature of the flow of air provided to the conditioned space; and
a controller configured to:
cause the blower to provide the flow of air at a first flow rate;
receive, from the temperature sensor over a first period of time, measurements of the discharge air temperature;
determine that the measured discharge air temperature satisfies predefined stability criteria associated with a change in the discharge air temperature during the first period of time being less than a threshold value;
in response to determining that the measured discharge air temperature satisfies the predefined stability criteria, determine a first temperature offset comprising a difference between the discharge air temperature and an indoor temperature;
determine a first outdoor temperature; and
store, in a memory of the controller, the first temperature offset associated with the first flow rate of the flow of air provided by the blower and the first outdoor temperature.