| 摘要 |
A substantially conventional evaporative cooler assembly is provided incorporating a water sump having an overflow and with which a float valve equipped pressurized supply of cool ground water is operatively associated for admitting water into the sump to an operating level slightly below the overflow level. A pump assembly is provided for pumping water from the sump to an evaporative pad through which air flowing through the cooler passes and a mechanical refrigeration unit including a compressor, evaporator coil and condenser coil is operatively associated with the cooler assembly. The evaporator coil is disposed across the flow of air moving through the cooler downstream from the evaporator pad, the condenser coil is mounted within the sump below operating level of water therein and further a cool ground water supply is provided for bypassing the float controlled water supply and admitting water into the sump responsive to the temperature of water within the sump increasing above a predetermined temperature.
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