Device for adjusting an air volume flow

Abstract

A device for adjusting an air volume flow, in particular in an air distribution network, has a central air channel which can be flowed through. The device has a throttle () which is arranged in the central air channel and which has at least a first throttle portion () having first blocking elements () and a second throttle portion () having second blocking elements (). The position of the second blocking elements () can be changed relative to the first blocking elements () in order to change a size of a cross section of the air channel which can be flowed through. The first blocking elements () and the second blocking elements () are configured in such a manner that in approximately all positions between the first end position and the second end position in approximately any radial direction they form a portion of the cross section which can be flowed through. The cross section which can be flowed through is expanded in at least some of the positions between the first and second end positions in the direction towards the longitudinal centre axis (L). The device according to the invention for adjusting a volume flow optimises the outflow behaviour.