EP 3020979 B1 20180822 - MULTI-BLADE FAN
Title (en)
MULTI-BLADE FAN
Title (de)
VENTILATOR MIT MEHREREN SCHAUFELN
Title (fr)
VENTILATEUR À PALES MULTIPLES
Publication
Application
Priority
JP 2013068871 W 20130710
Abstract (en)
[origin: EP3020979A1] A multiblade blower (1) includes: a first impeller (3a) arranged in a casing (2) having an air inlet (6) ; and a second impeller (3b) arranged in an internal space of the first impeller. The first impeller is a centrifugal fan including a plurality of first-impeller blades (11). The second impeller is an axial-flow fan including a plurality of second-impeller blades (14) extending radially from a rotation axis (5). In the second-impeller blades, a swirling-direction component of a wake in a region on an outer peripheral side in the internal space of the first impeller is smaller than a swirling-direction component of a wake in a region on an inner peripheral side in the internal space.
IPC 8 full level
F04D 29/28 (2006.01); F04D 29/00 (2006.01); F04D 29/30 (2006.01); F04D 29/32 (2006.01); F04D 29/38 (2006.01); F04D 29/66 (2006.01)
CPC (source: EP)
F04D 19/002 (2013.01); F04D 25/166 (2013.01); F04D 29/282 (2013.01); F04D 29/30 (2013.01); F04D 29/325 (2013.01); F04D 29/384 (2013.01)
Citation (examination)
JP H08135596 A 19960528 - DAIKIN IND LTD
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3020979 A1 20160518; EP 3020979 A4 20170301; EP 3020979 B1 20180822; JP 6038320 B2 20161207; JP WO2015004750 A1 20170223; WO 2015004750 A1 20150115
DOCDB simple family (application)
EP 13889351 A 20130710; JP 2013068871 W 20130710; JP 2015526062 A 20130710