Refrigeration – Automatic control – Humidity sensor
Patent
1992-04-20
1993-07-20
Tanner, Harry B.
Refrigeration
Automatic control
Humidity sensor
62129, 62262, 454256, 236 493, F25B 4900, F25D 1708
Patent
active
052283062
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.
REFERENCES:
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patent: 3402654 (1968-09-01), Berst
patent: 4257319 (1981-03-01), Kucharczyk
patent: 4478053 (1984-10-01), Yano et al.
patent: 4517810 (1985-05-01), Foley et al.
patent: 4702753 (1987-10-01), Kowalczyk
patent: 5024263 (1991-06-01), Laine et al.
Lee Djang-Jer
Shyu Jia-Ming
Norm Pacific Automation Corp.
Rabin Steven M.
Tanner Harry B.
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