EP 0846868 A2 19980610 - Centrifugal blower assembly
Title (en)
Centrifugal blower assembly
Title (de)
Kreiselgebläseeinheit
Title (fr)
Unité de soufflante centrifugale
Publication
Application
Priority
US 76077196 A 19961205
Abstract (en)
A centrifugal blower assembly (10) includes a volute housing (12) of the axially asymmetrically expanding type, with an upper end wall (24) flattened off for ease of installation and a spiraling lower end wall (26) and tangential outlet (34) that are consequently both downwardly axially displaced relative to the flat end wall (24) and the cylindrical air inlet (28) into the housing (12). To counteract the flow inefficiency that normally results from the axial displacement of inlet (28) relative to outlet (34), the blower (12) is formed with a curved tip ring (44) and correspondingly curved, axially opposed base rim (42) that shift axially downwardly from an air entrance (36) that is shifted axially above the flat end wall (24) and cylindrical inlet (28). Air drawn in through the entrance (36) by the blower (14) is thereby given a significant axially downward velocity component, which causes it to approach and better conform to the axially displaced end wall (26). <IMAGE>
IPC 1-7
IPC 8 full level
B60H 1/00 (2006.01); F04D 17/06 (2006.01); F04D 17/16 (2006.01); F04D 29/28 (2006.01); F04D 29/42 (2006.01); F04D 29/44 (2006.01)
CPC (source: EP)
F04D 17/06 (2013.01); F04D 29/282 (2013.01); F04D 29/4233 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0846868 A2 19980610; EP 0846868 A3 19990203; JP H10176696 A 19980630
DOCDB simple family (application)
EP 97203477 A 19971110; JP 33555297 A 19971205