Automatic temperature and humidity regulation – Ventilator type – Electrically actuated
Reexamination Certificate
2005-10-03
2009-02-03
Jiang, Chen-Wen (Department: 3744)
Automatic temperature and humidity regulation
Ventilator type
Electrically actuated
C340S627000, C340S632000, C340S511000
Reexamination Certificate
active
07484668
ABSTRACT:
An improved building protection system in a building having an inlet air duct for bringing an atmospheric air steam into the building, a damper in such air duct operable to regulate atmospheric air stream passing through the duct, a return air duct with a damper in such duct operable to regulate the return air stream mixed with the inlet air stream and a fan system means operable to suck an atmospheric air stream into the air duct and the return air stream into a return duct, an improved building protection system employing paired sensors for the same toxic agent in the ducts, logic means monitoring the outputs of the paired sensors operable to determine the parity of such outputs, logic means monitoring the outputs of the paired sensor operable to indicate the presence of such toxic agent and control means connected to the logic means operable to shut down the building's HVAC system only when the outputs have substantial parity and presence of such toxic agent is detected by said sensors. In practice a plurality of paired sensors are used, each paired sensors operable to detect a specific toxic agent.
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PCT Search report and written opinion mailed Jul. 8, 2008 for a foreign counterpart of this patent application.
Building Protection Systems, Inc.
Jiang Chen-Wen
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