Method and system for maintaining a desired air flow through a f

Details Method and system for maintaining a desired air flow through a f Method and system for maintaining a desired air flow through a f

1996-10-15

1999-08-31

Grant, William

Boots, shoes, and leggings

454 61, 454239, G06F 1900, B08B 1502

Patent

active

059462213

ABSTRACT:
The present invention pertains to a system for controlling a fume hood with a face. The system comprises a device for controlling air flow through the fume hood based on air flow face velocity. The controlling device has a device for measuring pressure at the face of the fume hood which produces a signal corresponding to the pressure. Additionally, the system comprises a controller. The controller is remote from the fume hood controlling device but in communication with the controlling device. The present invention also pertains to a system for controlling a fume hood having a face. The system comprises a pitot tube assembly for determining a desired face velocity. The pitot tube produces a pitot signal corresponding to the face velocity. The system comprises a device for converting the pitot signal into a face velocity signal. The converting device is connected to the pitot tube. Additionally, the system comprises a processor for controlling air flow through the fume hood based on the face velocity. The processor is connected to the converting device. The present invention also pertains to a method for controlling air flow through a fume hood having a face. The method comprises the steps of sensing velocity of air at the face of the fume hood with a pitot tube assembly. Then there is the step of controlling air flow through the fume hood based on the velocity of air at the face of the fume hood.

REFERENCES:
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patent: 5092227 (1992-03-01), Ahmed et al.
patent: 5205783 (1993-04-01), Dieckert et al.
patent: 5215497 (1993-06-01), Drees
patent: 5282770 (1994-02-01), Shibata
patent: 5304093 (1994-04-01), Sharp et al.
patent: 5312297 (1994-05-01), Dieckert et al.
patent: 5415583 (1995-05-01), Brandt, Jr.

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