| 摘要 |
FIELD: ventilation.SUBSTANCE: device for measurement and control of volumetric flux in a ventilation pipe includes a fastener fixed in the ventilation pipe and a sensing element with touch-sensitive surface, which is located on the fastener and made as a thermal anemometer. A swirling element is located in front of the sensing element, made for example in the form of a separation edge and distant from touch-sensitive surface so that a turbulent flow is created purposefully in the touch-sensitive surface zone. Behind the touch-sensitive surface there is a streamlined element that expands in cross section in the flow direction; based on the touch-sensitive surface height, the height increases and exceeds the height of the separation edge of the swirling element relative to the touch-sensitive surface.EFFECT: providing possibility of reliable measurement and control of volumetric air flux irrespective of ventilation pipe geometry.17 cl, 4 dwg |
