F - Mech Eng,Light,Heat,Weapons – 24 – F
Patent
F - Mech Eng,Light,Heat,Weapons
24
F
F24F 11/00 (2006.01)
Patent
CA 2055101
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.
Cette invention concerne un système de maintien de la pression ambiante d'une pièce équipée de hottes d'aspiration, un laboratoire par exemple, à une valeur de consigne différente de la pression ambiante dans un espace de référence qui peut être le corridor adjacent à la pièce ou un local adjacent. Le système comprend un régulateur de pression ambiante dans la pièce équipée de hottes, contrôleur qui fait partie de l'installation de chauffage, ventilation et conditionnement d'air du bâtiment. Ce régulateur est du type adapté pour recevoir des signaux électriques des contrôleurs de débit d'extraction des hottes d'aspiration. Exploitant ces signaux de débit volumique d'extraction, le régulateur de pression ambiante est en mesure de moduler l'apport d'air neuf dans la pièce de manière à maintenir la différence de pression au niveau voulu avec un temps de réaction relativement rapide.
Ahmed Osman
Bradley Steven Arthur
Macrae & Co.
Siemens Building Technologies Inc.
LandOfFree
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