Fans for fans and fans

摘要

Fan (axial fan)Radial fan or diagonal fanImpellerIn the upstream of this impellerPreferably, in the channel upstream of the suction region of the suction nozzleHaving a guide deviceSaid guide deviceIt is designed as an intake grid (1) having a plurality of flat webSaid multiple flat webForming a plurality of channels similar to the lattice openingSaid multiple flat webBetween the two branchesOr one branch (15) and one boundary regionBetween 31 and3 web (5)Each branch portion (15) merges.Alternatively, the flow path (6) of the intake grid (1) has a honeycomb cross-section and / or the outer envelope surface and / or the inner envelope surface of the intake grating (1) form a cage type contour.The corresponding intake grid is specified.Diagram