Continually optimized, variable flow rate ventilation system

Details Continually optimized, variable flow rate ventilation system Continually optimized, variable flow rate ventilation system

1995-06-16

1997-07-01

Joyce, Harold

Ventilation

Workstation ventilator

Spray booth

454 50, 454 53, 454229, B05B 1512

Patent

active

056430779

ABSTRACT:
A ventilation system for use, in example, on a spray booth or paint stripping enclosure, in which variable speed fans (or equivalent) are employed, and controlled by a sensor so that the flow rate exhausted from the booth (and directed either to an emission control device or vented to atmosphere) is continually adjusted to minimize the exhaust flow rate from the enclosure. The remainder of the ventilation air is recirculated back into the enclosure. An analyzer located in the recirculation duct continuously monitors the concentration of hazardous constituents present in the recirculation stream, and transmits this data to a central controller, which controls the ventilation fan systems. The central controller controls the recirculation duct and exhaust duct fan systems to achieve the highest recirculation rate possible, yet also maintain constituent concentrations in the recirculation duct at a safe level. The monitor senses concentrations in the recirculation duct on a virtually continuous basis, and the central controller continually adjusts the flow rate through the recirculation duct and exhaust duct to maintain a constant flow rate through the enclosure.

REFERENCES:
patent: 3395972 (1968-08-01), Hardison
patent: 4351863 (1982-09-01), Roesner
patent: 4687686 (1987-08-01), Stofleth et al.
patent: 5290200 (1994-03-01), Kiser

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