Ventilation – Workstation ventilator – Covered workbench chamber
Patent
1990-09-28
1992-05-26
Joyce, Harold
Ventilation
Workstation ventilator
Covered workbench chamber
454340, B08B 1502
Patent
active
051157284
ABSTRACT:
A system whereby the pressure of a room containing one or more fume hoods, such as a laboratory, is to maintained at a predetermined level relative to the pressure of a reference space in the building, which may be the pressure in an adjacent corridor or an adjacent room or the like. The system involves a room controller which is part of the heating, ventilating and air conditioning apparatus of the building. The room controller is of the type which can receive electrical signals from each fume hood controller, which signals are proportional to the volume of air that is being exhausted through each fume hood. The volume indicating signals communicated from each of the fume hood controllers to the room controller enable the system to modulate the volume of air that is being supplied to the room and thereby maintain the differential pressure at the desired level with relatively quick response times.
REFERENCES:
patent: 4773311 (1988-09-01), Sharp
patent: 4982605 (1991-01-01), Oram et al.
Ahmed Osman
Bradley Steven A.
Joyce Harold
Landis & Gyr Powers, Inc.
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