EP 0143235 B2 19911023 - AXIAL VENTILATOR WITHOUT GUIDE RING, ESPECIALLY FOR VENTILATING HEAT EXCHANGERS
Title (en)
AXIAL VENTILATOR WITHOUT GUIDE RING, ESPECIALLY FOR VENTILATING HEAT EXCHANGERS
Publication
Application
Priority
DE 3335649 A 19830930
Abstract (en)
[origin: EP0143235A1] 1. An axial ventilator without guide ring, particularly but not exclusively for ventilating heat exchangers, comprising a first housing part which directly surrounds a ventilator unit, and a second diffuser-housing part connected at the outflow end and of abruptly increased internal width, characterised in that at least the downstream corners at the outer edge of the vanes (S1-S8) of the ventilator unit (M; LR) are rounded (radius of curvature r) and the beginning of the abruptly increased internal width of the diffuser housing part (G2) is located at a distance in the region of +- 0.3 1a from the point of intersection of the prolongation of the rear edge of the vane, on the one hand, and the vane chord, on the other hand, in the region of the downstream corners of the vanes (S1-S8) of the impeller (LR), where 1a is the chord length of the vane profile in the outer section.
IPC 1-7
IPC 8 full level
F04D 29/32 (2006.01); F04D 29/38 (2006.01); F04D 29/52 (2006.01)
CPC (source: EP)
F04D 29/325 (2013.01); F04D 29/522 (2013.01)
Designated contracting state (EPC)
BE DE FR NL SE
DOCDB simple family (publication)
EP 0143235 A1 19850605; EP 0143235 B1 19871216; EP 0143235 B2 19911023; DE 3335649 A1 19850418; DE 3468134 D1 19880128
DOCDB simple family (application)
EP 84111075 A 19840917; DE 3335649 A 19830930; DE 3468134 T 19840917