EP 1980755 A3 20120516 - Noise reducing structure in fan device
Title (en)
Noise reducing structure in fan device
Title (de)
Geräuschdämpfungsstruktur für eine Ventilatorvorrichtung
Title (fr)
Structure de réduction sonore dans un dispositif de ventilation
Publication
Application
Priority
JP 2007102082 A 20070409
Abstract (en)
[origin: EP1980755A2] A noise reducing structure in a fan device is provided which can reduce noise generated in the interior of a housing of the fan device without deteriorating the air feed capacity of the fan device. In the noise reducing structure in a fan device, a fan (200) is rotated by a drive motor (600) to create an air flow. The air flow is introduced and uniformed by a bell-mouth-like shroud (400). Sound absorbing structures (310, 320, 330) are formed on a surface intersecting the outer periphery surface of the shroud (400).
IPC 8 full level
F04D 29/66 (2006.01)
CPC (source: EP)
F04D 29/663 (2013.01); F04D 29/665 (2013.01)
Citation (search report)
- [XY] US 6575695 B1 20030610 - MIYAMOTO JUNICHI [JP]
- [X] GB 2330624 A 19990428 - WANG SAMW HONG JEN [TW]
- [XD] JP 2001003750 A 20010109 - KOMATSU MFG CO LTD
- [Y] US 2005034918 A1 20050217 - BLAND ROBERT [US], et al
- [Y] JP 2005018042 A 20050120 - KOBE STEEL LTD
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
EP 1980755 A2 20081015; EP 1980755 A3 20120516; CN 101285488 A 20081015; CN 101285488 B 20120530; JP 2008255969 A 20081023
DOCDB simple family (application)
EP 08152389 A 20080306; CN 200810008639 A 20080201; JP 2007102082 A 20070409