US 12,442,556 B2
Flowrate determination system and method for a flow control valve
Jason J. Raasch, Cedarburg, WI (US); Christopher Brophy, Cedarburg, WI (US); Kevin A. Weiss, Chicago, IL (US); and Duane S. Freimuth, Franklin, WI (US)
Assigned to TYCO FIRE & SECURITY GMBH, Neuhausen am Rheinfall (CH)
Filed by Tyco Fire & Security GmbH, Neuhausen am Rheinfall (CH)
Filed on Feb. 26, 2021, as Appl. No. 17/187,175.
Prior Publication US 2022/0275963 A1, Sep. 1, 2022
Int. Cl. F24F 11/75 (2018.01); F16K 37/00 (2006.01); F24F 11/49 (2018.01); F24F 11/63 (2018.01); F24F 11/88 (2018.01); F24F 110/10 (2018.01); F24F 110/40 (2018.01); G01F 1/36 (2006.01); G01F 1/38 (2006.01); G05D 7/06 (2006.01)
CPC F24F 11/75 (2018.01) [F16K 37/0033 (2013.01); F16K 37/0041 (2013.01); F24F 11/49 (2018.01); F24F 11/63 (2018.01); F24F 11/88 (2018.01); G01F 1/363 (2013.01); G01F 1/383 (2013.01); G05D 7/0635 (2013.01); F24F 2110/10 (2018.01); F24F 2110/40 (2018.01)] 20 Claims
OG exemplary drawing
 
1. A flow control device for controlling flow in a heating, ventilation, or air conditioning (HVAC) system, the flow control device comprising:
a pressure-regulating valve comprising an inlet path and an outlet path;
a moveable fluid barrier configured to adjust a size of an opening of the pressure-regulating valve;
a control valve comprising a valve member and a valve stem coupled to the valve member;
a first sensor configured to obtain pressure measurements within the pressure-regulating valve based on linear displacement of the moveable fluid barrier;
a second sensor configured to obtain linear and angular displacement measurements of the valve stem; and
a controller comprising a processing circuit configured to:
determine a flowrate based at least on the pressure measurements from the first sensor and the linear and angular displacement measurements from the second sensor;
determine an amount of energy provided by a heat exchanger; and
adjust the valve stem based on the amount of energy and a factor related to the flowrate.