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1. (WO2018184946) RADIAL FAN

Pub. No.:    WO/2018/184946    International Application No.:    PCT/EP2018/057944
Publication Date: Fri Oct 12 01:59:59 CEST 2018 International Filing Date: Thu Mar 29 01:59:59 CEST 2018
IPC: F04D 29/28
F04D 29/30
F04D 29/44
F04D 29/16
Applicants: EBM-PAPST ST. GEORGEN GMBH & CO. KG
Inventors: RAGG, Peter
MOOSMANN, Christian
Title: RADIAL FAN
Abstract:
The invention relates to a radial fan comprising: a fan impeller (2) which can rotate about an axis (1) and which comprises a base plate (29) and air blades (31) protruding from the base plate (29), the air blades (31) each having an upstream edge (32) at a first distance (r1) from the axis (1) and a downstream edge (33) at a second distance (r2) from the axis (1); and an end wall (15) which together with the base plate (29) delimits a flow channel (30) with which the air blades (31) engage. The cross-sectional area (A) of the flow channel (30) attains a maximum between the upstream (32) and the downstream edge (33) at a third distance (r3) from the axis (1). The difference between a fourth (r4) and a fifth distance (r5), at which distances the cross-sectional area (A) attains minima most closely adjacent to the maximum, is at least half the difference (r2-r1) between the first and the second distance.