Apparatus for controlling air-exchange and pressure and detecting airtight conditions in air-conditioned room
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United States of America Patent
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Jul 20, 1993
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N/A
app pub date -
Apr 20, 1992
filing date -
Apr 20, 1992
priority date (Note) -
Expired
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Abstract
An apparatus for controlling air-exchange and pressure conditions in an air-conditioned room by opening and closing ducts and operating fans. The apparatus provides required indoor air pressure, such as a positive pressure for preventing dust from entering a room, or a cyclically modulated pressure in specific modes for achieving special atmospheric effects, such as to improve the spirits of occupants or to expel insects. The rate of change of the indoor pressure relative to the outdoor pressure can be measured in order to detect the degree of airtightness of the room. A warning signal is triggered when an abnormal condition of airtightness occurs, so that users may take steps to minimize unnecessary air-exchange, reduce energy consumption, and increase efficiency for air filtering and air conditioning.
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