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1. (WO2017036668) SPIRAL HOUSING FOR A RADIAL FAN

Pub. No.:    WO/2017/036668    International Application No.:    PCT/EP2016/067507
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Jul 23 01:59:59 CEST 2016
IPC: F04D 25/08
F04D 29/42
F04D 29/66
Applicants: EBM-PAPST MULFINGEN GMBH & CO. KG
Inventors: GEBERT, Daniel
HAAF, Oliver
Title: SPIRAL HOUSING FOR A RADIAL FAN
Abstract:
The invention relates to a spiral housing of a radial fan, comprising an increasing flow cross-section surface area in the peripheral direction, starting from a housing tongue, about a fan impeller which can be arranged on an axial middle axis, wherein the flow cross-section surface area is determined by a contour at least of one axial side part of the spiral housing, wherein the side part comprises an axial suction opening having an opening edge section surrounding same, to which, viewed in the radial direction, a transition section running in the peripheral direction is directly connected, which is spaced in a starting section, extending from the housing tongue in the peripheral direction over a predetermined angle, in the axial direction to the opening edge section, and comprises a path increasing the flow cross-section in the peripheral direction, running in the same plane to axial surfaces of the opening edge section and of the transition section.