01-09-2022 дата публикации
Номер: US20220275963A1
A flow control device for controlling flow in a heating, ventilation, or air conditioning (HVAC) system is shown. The flow control device includes a valve body including an inlet path, an outlet path, a valve member, and a valve stem coupled to the valve member. The flow control device includes a first sensor configured to obtain pressure measurements within the valve body, a second sensor configured to obtain displacement measurements of the valve stem, and a controller including a processing circuit configured to determine a flowrate based at least on the pressure measurements from the first sensor and the displacement measurements from the second sensor. 1. A flow control device for controlling flow in a heating , ventilation , or air conditioning (HVAC) system , the flow control device comprising:a valve body comprising an inlet path, an outlet path, a valve member, and a valve stem coupled to the valve member;a first sensor configured to obtain pressure measurements within the valve body;a second sensor configured to obtain displacement measurements of the valve stem; anda controller comprising a processing circuit configured to determine a flowrate based at least on the pressure measurements from the first sensor and the displacement measurements from the second sensor.2. The flow control device of claim 1 , wherein the valve body further comprises a diaphragm; andwherein the first sensor is configured to obtain the pressure measurements based on one or more displacement measurements of the diaphragm.3. The flow control device of claim 1 , wherein the controller is further configured to:receive the pressure measurements and the displacement measurements;receive flow control device parameters from a database, the flow control device parameters s comprising at least one of a specific gravity, a flow coefficient of the flow control device, a diaphragm characteristic, and a spring characteristic;determine a pressure differential between the pressure in the inlet ...
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