Fume hood air flow control system

Details Fume hood air flow control system Fume hood air flow control system

1993-12-21

1995-05-16

Joyce, Harold

Ventilation

Workstation ventilator

Covered workbench chamber

B08B 1502

Patent

active

054155835

ABSTRACT:
An apparatus controls the face velocity of air flowing from a room into a fume hood. The fume hood includes a movable sash and an exhaust system. An air flow measuring device such as a parallel plate pitot is positioned within the fume hood between a pair of spaced apart air foils and outputs a signal that is representative of the air velocity between the air foils. An actuator controls the fume hood exhaust system in response to pitot output. Face velocity is maintained regardless of sash position.

REFERENCES:
patent: 3581565 (1971-06-01), Dieterich
patent: 5036711 (1991-08-01), Good

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