EP 2295817 A3 20120314 - Blowing fan and blower using the same
Title (en)
Blowing fan and blower using the same
Title (de)
Gebläserotor und Gebläse damit
Title (fr)
Rotor d'une soufflante radiale et ventilateur l'utilisant
Publication
Application
Priority
JP 2009210072 A 20090911
Abstract (en)
[origin: EP2295817A2] A blowing fan includes a hub to which a rotary shaft of a motor is rigidly mounted, a shroud confronting the hub, and multiple blades placed between the hub and the shroud. A space is formed between a tailing edge of each one of the blades and the shroud. Flowing of air through this space allows reducing an air-speed at the outer most periphery of the blowing fan while the performance of the fan can be maintained. As a result, BPF (Blade Passing Frequency) noises can be lowered. On top of that, this simple construction allows manufacturing the blowing fan at a lower cost.
IPC 8 full level
F04D 29/28 (2006.01); F04D 29/30 (2006.01)
CPC (source: EP)
F04D 29/281 (2013.01); F04D 29/288 (2013.01); F04D 29/30 (2013.01); F05D 2240/304 (2013.01)
Citation (search report)
- [X] US 2005169750 A1 20050804 - KIM WOOK [KR], et al
- [X] EP 1455094 A1 20040908 - ZIEHL ABEGG AG [DE]
- [X] DE 8909594 U1 19891005
- [X] JP H04311698 A 19921104 - MATSUSHITA ELECTRIC IND CO 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 SE SI SK SM TR
Designated extension state (EPC)
BA ME RS
DOCDB simple family (publication)
EP 2295817 A2 20110316; EP 2295817 A3 20120314; CN 102022349 A 20110420; CN 201851371 U 20110601; JP 2011058442 A 20110324; JP 4894900 B2 20120314; TW 201109532 A 20110316; TW I418709 B 20131211
DOCDB simple family (application)
EP 10174481 A 20100830; CN 201010282474 A 20100910; CN 201020526883 U 20100910; JP 2009210072 A 20090911; TW 99124719 A 20100727