Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Plenum type
Patent
1994-07-26
1995-06-20
Tapolcai, William E.
Automatic temperature and humidity regulation
Mixing fluid of dissimilar temperature
Plenum type
236 493, 417 5, 454258, G05D 2313
Patent
active
054255023
ABSTRACT:
A VAV air conditioning system has a micro-computer control device, a main fan motor, a by-pass fan motor, a heat exchange pipe assembly. The micro-computer control device has a function setting unit, temperature detecting units, a central processing unit and an output control unit and a power supply unit. A control circuit is used to control the main fan motor to supply air led through the heat exchange pipe assembly in accordance with a loading requirement in a closed space so that the temperature thereof can be precisely controlled. As a conditioning loading is lowered, the control circuit can make the main fan motor slow down so as to reduce the supply of conditioned air volume, causing a decrease of main air supply. In the meanwhile, the control circuit outputs another power variable signal to a by-pass fan motor which can produce air supply led directly into the closed space without going through the heat exchange pipe assembly. The speed of the by-pass fan is increased to supply extra air so that the sum of the main air supply and the by-pass air supply is equal to a constant. After a loading requirement and the air conditioning capacity of an air conditioning system reaches equilibrium it can stably maintain a basic ventilation air supply.
REFERENCES:
patent: 2266217 (1941-12-01), Kingsland
patent: 4294403 (1981-10-01), Ammons et al.
patent: 4516628 (1985-05-01), Ward
patent: 4917174 (1990-04-01), Ring
patent: 4949782 (1990-08-01), Braud
Weng Kuo-Liang
Weng Lianq K.
Tapolcai William E.
Yu Feng Enterprise Co., Ltd.
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