EP 0332078 B1 19910918 - REGENERATIVE BLOWER
Title (en)
REGENERATIVE BLOWER
Publication
Application
Priority
- DE 3807362 A 19880306
- DE 3822267 A 19880701
Abstract (en)
[origin: EP0332078A1] An annular duct fan (1) is indicated which serves in particular for delivering combustion air on heating appliances, preferably motor vehicle heating appliances. In this annular duct fan (1) there is a gradual transition from the pressure area to the outlet or to the outlet aperture (9), the annular duct (4) being covered on that side of the annular duct facing an impeller wheel (3), upstream of the outlet (9). A crescent-shaped or sail-shaped covering section (11) is appropriately provided which, starting from the inside edge of the annular duct (6) roughly on a level with the projection of the outlet aperture to the annular duct (6) constantly tapers towards the compression seal in the annular duct (6) of the annular duct fan (1) and ends on the outer edge (5) of the annular duct (6) of the annular duct fan in a type of rounded peak (13). In addition a section is provided on the inlet area (17) which is formed by the web-shaped interrupter (16) and which partially covers the inlet aperture (8) and which, starting from the outer edge (5) of the annular duct, extends approximately tangentially to the inner edge (6) of this. This section (17) is also slightly inclined in the direction towards the base (7) of the annular duct (4). <IMAGE>
IPC 1-7
IPC 8 full level
B60H 1/03 (2006.01); F04D 23/00 (2006.01); F04D 29/66 (2006.01); F23L 5/00 (2006.01)
CPC (source: EP US)
F04D 23/008 (2013.01 - EP US); F04D 27/009 (2013.01 - EP US); F04D 29/161 (2013.01 - EP US); F04D 29/663 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 0332078 A1 19890913; EP 0332078 B1 19910918; DE 3822267 A1 19891207; DE 3822267 C2 19901108; DE 58900290 D1 19911024; JP H01271698 A 19891030; US 4932833 A 19900612
DOCDB simple family (application)
EP 89103757 A 19890303; DE 3822267 A 19880701; DE 58900290 T 19890303; JP 5184389 A 19890303; US 31877089 A 19890303