EP 2905474 A1 20150812 - PROPELLER FAN
Title (en)
PROPELLER FAN
Title (de)
PROPELLERLÜFTER
Title (fr)
VENTILATEUR HÉLICOÏDAL
Publication
Application
Priority
JP 2012075656 W 20121003
Abstract (en)
Provided is a propeller fan (1), including: a boss section (3) including a tubular wall (3a); and a plurality of blades (5) extending in a radiate manner from an outer peripheral surface (3d) of the tubular wall of the boss section. Secondary flow control slits (7) are each formed between a pair of the adjacent blades on the outer peripheral surface. Each of a plurality of the secondary flow control slits passes through the tubular wall to communicate between an inside of the boss section and an outside of the boss section. A downstream end of the tubular wall is closed, whereas an upstream end of the tubular wall is open. In side view, the each of the plurality of the secondary flow control slits extends obliquely to a rotation axis of the propeller fan, and extends obliquely in the same direction as a forming direction of a blade root portion of each of the plurality of blades.
IPC 8 full level
F04D 29/32 (2006.01); F04D 29/66 (2006.01)
CPC (source: CN EP US)
F04D 25/02 (2013.01 - US); F04D 29/325 (2013.01 - US); F04D 29/329 (2013.01 - CN EP US); F04D 29/682 (2013.01 - CN EP US); F04D 29/684 (2013.01 - CN EP US); F04D 19/002 (2013.01 - EP US)
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2905474 A1 20150812; EP 2905474 A4 20160706; EP 2905474 B1 20190828; CN 104685218 A 20150603; CN 104685218 B 20180316; JP 5984162 B2 20160906; JP WO2014054132 A1 20160825; US 2015204345 A1 20150723; WO 2014054132 A1 20140410
DOCDB simple family (application)
EP 12886000 A 20121003; CN 201280076216 A 20121003; JP 2012075656 W 20121003; JP 2014539524 A 20121003; US 201214423495 A 20121003