Automatic temperature and humidity regulation – Humidity control
Patent
1994-11-03
1996-05-28
Wayner, William E.
Automatic temperature and humidity regulation
Humidity control
165 16, 236 493, 454239, F25B 2900, F24F 1100
Patent
active
055203280
ABSTRACT:
A system for providing air quality control for an indoor area divided into a plurality of zones, whereby air quality is controlled both centrally and at each of the zones, including a central controller, a central damper, a supply air stream duct, a return air duct, a plurality of zone controllers, a plurality of zone dampers, a plurality of air quality sensors (i.e., CO.sub.2, volatile organic compounds, humidity, etc. . . ) and a plurality of temperature sensors. A method for providing air quality control for an indoor area divided into a plurality of zones, whereby air quality is controlled both centrally and at each of the zones, including the steps of: reading an output value of an air quality sensor from one of the zones, comparing the output value with a zone maximum threshold value and a zone minimum threshold value, modulating the zone damper to vary a supply air flow into the zone, repeating the first three steps for each zone, determining a predetermined function (i.e., average, maximum, minimum, etc. . . ) of the output values from all of the zones, comparing the function of the output values with a central maximum threshold value and a central minimum threshold value, and modulating the central damper to vary the flow of outside air into the supply air stream.
REFERENCES:
patent: 4407185 (1983-10-01), Haines et al.
patent: 5353862 (1994-10-01), Akiyama et al.
"If The Ins and Outs of IAQ Take Your Breath Away, We've Got Some Answers to Help You", Ashrae Journal's Office Product and Show Guide, Jan. 1995.
Carrier Corporation
Wayner William E.
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