Plant for the internal air - quality control for integrated spaces

摘要

A system for providing air quality control for an indoor area divided into a plurality of zones, controls air quality both centrally and at each of the zones, and includes a central controller (101), a central damper (103), a supply air stream duct (105), a return air duct (107), a plurality of zone controllers (111, 113, 115), a plurality of zone dampers (121, 123, 125), a plurality of air quality sensors (131, 133, 135) (e.g. CO2, volatile organic compounds, humidity, etc...) and a plurality of temperature sensors (141, 143, 145). An output value of an air quality sensor (131-135) from one of the zones, is compared with a zone maximum threshold value and a zone minimum threshold value. The damper (123-125) of the corresponding zone is modulated to vary the supply air flow into the zone. These steps are repeated for each zone. A predetermined function (e.g. average, maximum, minimum, etc...) of the output values from all of the zones is compared with a central maximum threshold value and a central minimum threshold value, and the central damper is modulated to vary the flow of outside air into the supply air stream based on this comparison. IMAGE