US 12,000,721 B2
Air duct airflow sensor with internal low-pressure detector
Jean H. Scholten, Roswell, GA (US)
Assigned to Tyco Fire & Security GmbH, Neuhausen am Rheinfall (CH)
Filed by Johnson Controls Tyco IP Holdings LLP, Milwaukee, WI (US)
Filed on Aug. 14, 2020, as Appl. No. 16/993,812.
Application 16/993,812 is a continuation of application No. 16/251,011, filed on Jan. 17, 2019, granted, now 10,768,031.
Claims priority of provisional application 62/618,142, filed on Jan. 17, 2018.
Prior Publication US 2020/0370936 A1, Nov. 26, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. G01F 1/684 (2006.01); F24F 11/30 (2018.01); F24F 11/49 (2018.01); F24F 11/74 (2018.01); F24F 13/10 (2006.01); G01D 7/00 (2006.01); G01F 1/40 (2006.01); G01F 5/00 (2006.01); G05D 7/00 (2006.01); F24F 110/40 (2018.01)
CPC G01F 1/40 (2013.01) [F24F 11/30 (2018.01); F24F 11/49 (2018.01); F24F 11/74 (2018.01); F24F 13/10 (2013.01); G01F 5/00 (2013.01); G05D 7/00 (2013.01); F24F 2110/40 (2018.01); G01F 1/684 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An airflow sensor assembly for an air duct, the air duct having an interior and comprising:
a high pressure detection component;
a low pressure detection component, comprising:
a surface to be disposed within the interior of the air duct and having geometry to provide an air restriction in the interior of the air duct, the surface having a plurality of first apertures spaced along the surface; and
a pressure sensor system configured to be fluidly coupled to the high pressure detection component and the low pressure detection component.