초록 ▼

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 c

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.

대표청구항 ▼

Improved control apparatus for balancing and controlling an air conditioning system operative in an air cooling mode or an air heating mode to cool or heat ambient air in a swimming pool room, the conditioning system comprising: a main duct having an inlet for return air drawn from a pool room, a su

Improved control apparatus for balancing and controlling an air conditioning system operative in an air cooling mode or an air heating mode to cool or heat ambient air in a swimming pool room, the conditioning system comprising: a main duct having an inlet for return air drawn from a pool room, a supply air blower positioned downstream in the duct from said return air inlet said blower having an inlet for drawing an airstream through the duct and an outlet for supplying conditioned air to said pool room, a return air cooling evaporator coil having a return air inlet side and an air outlet side, and an air reheating condenser coil having an air inlet side and an outlet side, said evaporator and condenser coils being arranged in said duct in the stated order between the inlet to the duct for return air and the supply air blower, each coil having an inlet and an outlet for refrigerant, a refrigerant compressor having an outlet for compressed refrigerant and an inlet for returned refrigerant, an exhaust blower having an inlet and an outlet from which air is exhausted to the outdoor atmosphere, a warm air damper and a motor for controlling the damper, the warm air damper being interposed between the return air inlet side of said evaporator coiled and said exhaust blower inlet, a cool air damper and a motor for controlling the damper, the cool air damper being interposed between said air outlet side of the evaporator and said exhaust blower inlet, a makeup air damper and a motor for controlling the damper the makeup air damper being interposed between said outlet side of the return air cooling condenser and the outdoor atmosphere, said makeup damper is controlled to effect drawing in outdoor air in sufficient volume to make up for the fraction of the return air volume that is exhausted by way of said warm air damper when the air conditioning system is operating in the pool room air cooling mode while the cool air damper is closed and to make up for the fraction of return air volume that is exhausted by way of said cool air damper when the system is operating in the pool room air heating mode while the war air damper is closed, a bypass damper and a motor for controlling the damper, the bypass damper is arranged to bypass a percentage of the volume of return air past the evaporated coil, said control apparatus comprising: a controller for controlling the damper motors, a first pair of static air pressure sensors, one positioned at the return air inlet side and the other positioned downstream at the air outlet side of the evaporated coil to provide for determining the static pressure drop across said evaporator coil and volume of air flowing over the evaporator coil, a second pair of static air pressure sensors, one positioned at the air inlet side and the other positioned at the air outlet side of said exhaust blower to provide for determining the static pressure drop across the exhaust blower and the volume of the return air exhausted by the open one of the warm air or cool air exhaust dampers, a third pair of static air pressure sensors, one positioned at the air inlet side of said reheat condenser coil and the other positioned on the outlet side to provide for determining the static pressure drop across the reheater coil and the total volume of air drawn through said main duct by said supply air blower, transducer means operative to determine the differences between the pressures sensed by sensors in the respective pairs of sensors and to produce signals respectively corresponding to the pressure differences, said controller is operative to compare said pressure difference signals, respectively, with predetermined set points and if a variance exists between a pressure difference signal and its set point said controller produces a control signal for controlling the motor of the damper to which the variance relates to adjust said damper until said variance is nulled.