Refrigeration – Automatic control – Of external fluid or means
Patent
1996-07-02
1997-11-04
Tanner, Harry B.
Refrigeration
Automatic control
Of external fluid or means
454238, 236 493, F24F 706
Patent
active
056827547
ABSTRACT:
A swimming pool room air conditioner has a duct with an inlet return for air drawn from the pool room and a supply air blower downstream from the inlet of the duct for the blower to draw air through the duct and supply it to the pool room after the air is conditioned. The duct inlet, an evaporator coil for cooling and dehumidifying return air, an air reheat condenser coil and the supply blower are arranged in the duct in the stated order. A motor controlled damper is arranged for bypassing return air around the evaporator coil and thereby cause a predetermined humid return air flow over the evaporator. An exhaust blower is provided. A motor controlled warm air damper is arranged for allowing the exhaust blower to draw a fraction of the return air before the return air flows over the dehumidifier evaporator coil and discharges the fraction to outdoors. A cool air damper is arranged for the exhaust blower to exhaust a fraction of the cooled air to the outdoors. An air makeup damper allows drawing in a volume of outdoor fresh air. All dampers are controlled to establish predetermined constant air flows by sensing the static pressure differences across the exhaust blower, the evaporator, and the reheat condenser coil and comparing the signals representing the determined predetermined air flows with set points with a programmable controller that issues signals that cause the damper motors to regulate until variances between difference signals and set points are nulled.
REFERENCES:
patent: 4086781 (1978-05-01), Brody et al.
patent: 4210278 (1980-07-01), Obler
patent: 4407185 (1983-10-01), Haines et al.
patent: 5257958 (1993-11-01), Jagers
Desert Aire Corp.
Tanner Harry B.
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