Fume hood controller

Details Fume hood controller Fume hood controller

B - Operations, Transporting

08

B

341/38, 98/42

B08B 15/02 (2006.01)

Patent

CA 1259119

ABSTRACT FUME HOOD CONTROLLER A fume hood controller system in which the sash position is monitored by a transducer which provides a signal indicative of the area of the hood opening. A variable speed motor controller is responsive to the sash position signal to provide a fan speed which varies in a substantially continuous and linear manner as a function of the sash opening. In an alternate embodiment, the air flow through the hood is controlled by a damper or similar device. Several embodiments are shown in which the present invention may be used to control a fume hood system in which a blower exhausts a plurality of fume hoods while maintaining a substantially constant face velocity in each hood.

508750

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