EP 0954390 B1 20030502 - FUME HOOD HAVING A BI-STABLE VORTEX
Title (en)
FUME HOOD HAVING A BI-STABLE VORTEX
Title (de)
RAUCHABZUG MIT BISTABILER WIRBELSTRÖMUNG
Title (fr)
HOTTE A TURBULENCES BISTABLES
Publication
Application
Priority
- US 9800956 W 19980116
- US 3599797 P 19970122
Abstract (en)
[origin: WO9831481A1] The flow of air through a fume hood (78) is optimized by producing a bi-stable vortex within the vortex chamber of the fume hood regardless of sash (18) movement. A bi-stable fume hood optimizes capture face velocity to minimize backflow of fume laden air through the hood sash opening. This bi-stable vortex fume hood utilizes a vortex pressure control system to reposition top, center, and bottom slot openings (32, 34, 36) of a baffle in the hood. This baffle moves the bi-stable vortex away from the face when the sash is fully opened and creates a clearing action near the work surface as the sash is closed. An airfoil (76) is placed inside the fume hood chamber and the airfoil has multiple entry pattern, one of which turns the vortex up and away from the open sash window. The other creates flow which washes the work surface of the hood. The interior portion of the vortex chamber utilizes a turning vane (65) in order to decrease dynamic losses and increases bi-stable vortex stability.
IPC 1-7
IPC 8 full level
F24F 7/007 (2006.01); B08B 15/02 (2006.01)
CPC (source: EP)
B08B 15/023 (2013.01)
Designated contracting state (EPC)
BE DE DK ES FR GB NL SE
DOCDB simple family (publication)
WO 9831481 A1 19980723; WO 9831481 A8 19990422; AU 5961698 A 19980807; DE 69814036 D1 20030605; DE 69814036 T2 20040408; DK 0954390 T3 20030728; EP 0954390 A1 19991110; EP 0954390 A4 20000419; EP 0954390 B1 20030502; ES 2197460 T3 20040101; JP 2001518174 A 20011009
DOCDB simple family (application)
US 9800956 W 19980116; AU 5961698 A 19980116; DE 69814036 T 19980116; DK 98902812 T 19980116; EP 98902812 A 19980116; ES 98902812 T 19980116; JP 53460098 A 19980116