EP 1378669 A1 20040107 - A method and apparatus for minimizing noise from fan filter unit
Title (en)
A method and apparatus for minimizing noise from fan filter unit
Title (de)
Verfahren und Vorrichtung zur Geräuschminderung einer Filter-Lüftereinheit
Title (fr)
Procédé et dispositif minimisant le bruit d'un bloc soufflerie-filtre
Publication
Application
Priority
- EP 97945156 A 19970903
- SG 9700040 W 19970903
Abstract (en)
In order to provide a fan filter unit whereby the noise from the fan filter unit is minimised without requiring conventional sound insulation material in contact with the airflow path and without introducing contaminants from such sound insulation material into the airflow through the fan filter unit, the fan filter unit comprises at least a fan blower (12) disposed on a base plate (14), a top housing (16) coupled to said base plate (14) with an inlet opening (18) and a side housing (22) coupled to said top housing (16) for enclosing the fan filter unit, said side housing (22) further having an outlet opening, the fan (12) being for drawing air through the inlet opening (18) and for discharging air through the outlet opening. The fan filter unit has at least a pair of S-shaped guides (24) disposed on said base plate (14) within said fan filter unit and circumferentially of said fan blower (12) for receiving air discharged therefrom; guide means (26,28) disposed within the fan filter unit and at the output of said S shaped guides (24) for diffusing the airflow therefrom; and for directing airflow to below said base plate (14); and means for evenly distributing the airflow whereby the flow of air is guided with reduced turbulence compared to a fan filter unit which does not have the S shaped guides (24) and guide means (26,28) .
IPC 1-7
IPC 8 full level
F04D 17/16 (2006.01); F04D 29/42 (2006.01); F04D 29/66 (2006.01); F04D 29/70 (2006.01); F24F 7/007 (2006.01); F24F 13/24 (2006.01)
IPC 8 main group level
F04D (2006.01)
CPC (source: EP)
F04D 17/165 (2013.01); F04D 29/4246 (2013.01); F04D 29/663 (2013.01); F24F 7/007 (2013.01); F24F 13/24 (2013.01)
Citation (search report)
- [Y] US 4560395 A 19851224 - DAVIS GEORGE B [US]
- [Y] US 4768424 A 19880906 - FRENKLER FRIEDRICH K [DE], et al
- [A] US 3065684 A 19621127 - O'DAY CORTLAND N
- [A] US 4023472 A 19770517 - GRUNDER HANS, et al
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1378669 A1 20040107; CA 2302177 A1 19990311; CN 100436836 C 20081126; CN 1447031 A 20031008; DE 69727322 D1 20040226; DE 69727322 T2 20041125; HK 1019629 A1 20000218; MY 111326 A 19991130; TW 375760 B 19991201
DOCDB simple family (application)
EP 03077576 A 19970903; CA 2302177 A 19970903; CN 02122661 A 19970903; DE 69727322 T 19970903; HK 99103719 A 19990830; MY PI19976131 A 19971218; TW 86112677 A 19970903