ANORDNING TIL AT MAALE EN VENTILATORS STROEMNINGSVOLUMEN

摘要

A measuring device for measuring the pressure difference δp and thereby the volume flow qv of a fan has a two- chamber measuring part 2 located in the pressure aperture or its continuation in the fan. Each chamber has small- diameter apertures 5, and that inner surface 8 in the measuring-device housing 1 against which or close to which the measuring part 2 is located is the tongue 10 or the tongue-shaped plate 9 or a continuation thereof on the fan casing. The measuring part 2 is installed inside the housing 1 in such a manner that the direction F of the flow to be measured is substantially perpendicular to the length C of the measuring part. <IMAGE>