Device for measuring and regulating a volume flow in a...

F - Mech Eng,Light,Heat,Weapons – 24 – F

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F24F 11/04 (2006.01)

Patent

CA 2717455

A device for measuring a volume flow in a ventilation pipe (1) comprises a mounting (8) that can be fixed in the ventilation pipe (1) and a sensor element (13) having a sensor surface (18.1), said element being disposed on the mounting (8) and configured as a thermal anemometer. Upstream of the sensor element (13) is a turbulence-generating element, for example in the form of a break-away edge (17.1), which is configured and disposed at a distance from the sensor surface (18.1) such that highly turbulent flow is generated in the region of the sensor surface (18.1) in a targeted manner. Downstream of the sensor surface (18.1) is a flow element (20), which widens in the cross-section thereof in the flow direction (L), wherein starting from a height level of the sensor surface (18.1) a height is reached that is greater than the height of the break-away edge (17.1) opposite the sensor surface (18.1).

L'invention porte sur un dispositif de mesure d'un débit volumique dans un tube d'aération (1), qui comprend une attache (8), pouvant être fixée dans le tube d'aération (1), et un élément capteur (13), disposé sur l'attache (8), configuré comme un anémomètre thermique, comportant une face captrice (18.1). En avant de l'élément capteur (13) se trouve un élément générateur de turbulences, par exemple sous forme d'un bord déchirable (17.1), qui est configuré, et éloigné de la face captrice (18.1), de façon à générer dans la zone de la face captrice (18.1) et d'une manière ciblée un écoulement fortement turbulent. En aval de la face captrice (18.1) est prévu un élément d'écoulement (20), lequel, en section transversale s'élargit dans la direction de l'écoulement (L), en atteignant, à partir d'un niveau de hauteur de la face captrice (18.1), une hauteur qui est supérieure à la hauteur du bord déchirable (17.1) vis-à-vis de la face captrice (18.1).

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