US 12,259,148 B2
Computerized HVAC filter evaluation system
Hung M. Pham, Dayton, OH (US); Stuart K. Morgan, West Chester, OH (US); and Brian R. Butler, Centerville, OH (US)
Assigned to Copeland LP, Sidney, OH (US)
Appl. No. 17/048,910
Filed by Copeland LP, Sidney, OH (US)
PCT Filed Apr. 19, 2019, PCT No. PCT/US2019/028400
§ 371(c)(1), (2) Date Oct. 19, 2020,
PCT Pub. No. WO2019/204786, PCT Pub. Date Oct. 24, 2019.
Claims priority of provisional application 62/660,903, filed on Apr. 20, 2018.
Prior Publication US 2021/0231331 A1, Jul. 29, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 46/00 (2022.01); B01D 46/44 (2006.01); B01D 46/46 (2006.01); B01D 46/88 (2022.01); F24F 8/10 (2021.01); F24F 8/108 (2021.01); F24F 11/38 (2018.01); F24F 11/39 (2018.01); F24F 110/10 (2018.01)
CPC F24F 11/39 (2018.01) [B01D 46/0086 (2013.01); B01D 46/444 (2013.01); B01D 46/448 (2013.01); B01D 46/46 (2013.01); B01D 46/88 (2022.01); F24F 8/10 (2021.01); F24F 8/108 (2021.01); F24F 11/38 (2018.01); B01D 2279/50 (2013.01); F24F 2110/10 (2018.01)] 19 Claims
OG exemplary drawing
 
1. A heating, ventilation, and air conditioning (HVAC) control system comprising:
a processor; and
a computer-readable medium that includes instructions executable by the processor, wherein the instructions include:
selectively generating a replacement request for an operator to replace a first air filter installed in an air handler of an HVAC system with a second air filter, wherein (i) the first air filter has a first particulate matter removal efficiency rating and (ii) the second air filter has a second particulate matter removal efficiency rating that is greater than the first particulate matter removal efficiency rating,
in response to activation of the HVAC system following installation of the second air filter, delaying for a first predetermined period of time and then obtaining (i) a first temperature that represents a temperature of air downstream of the air handler and (ii) a second temperature that represents a temperature of air upstream of the air handler,
calculating a first temperature difference between the first temperature and the second temperature,
determining whether the first temperature difference is within an acceptable range,
in response to the first temperature difference being within the acceptable range, (i) operating the HVAC system using the second air filter and (ii) generating an alert indicating compatibility of the second air filter with the HVAC system, and
in response to determining that the first temperature difference is outside of the acceptable range, disabling operation of the HVAC system pending replacement of the second air filter.