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Regulation of atmospheric conditions within a confined space

  • US 4,850,264 A
  • Filed: 11/25/1987
  • Issued: 07/25/1989
  • Est. Priority Date: 11/25/1987
  • Status: Expired due to Term
First Claim
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1. A ductless system for pressurizing a building or other enclosed space and regulating atmospheric conditions therein, said building having randomly located, uncontrolled leakage passageways extending between said enclosed space and the external ambient atmosphere, comprising a plurality of air handling units distributed about said building, each said air handling unit being adapted to openly admit conditioned air in controlled amounts directly to said enclosed space, adjustable relief dampers spaced around the perimeter of said building for selectively permitting exfiltration of atmosphere from said pressurized, enclosed space, a plurality of pressure sensing means positioned at selected locations within said building for generating a signal indicative of the observed atmospheric pressure at each said location, and a central computer for periodically receiving said signals, said central computer being adapted to compare said signals to stored data representing the desired atmospheric pressure at each said location, generate second signals indicative of a deviation of said observed atmospheric pressure from said desired atmospheric pressure at each location, and adjust appropriate ones of said relief dampers and the output of conditioned air from appropriate ones of said air handling units in response to said second signals to thereby maintain the atmospheric pressure throughout said enclosed space at a desired level above that of said external ambient atmosphere.

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