Air conditioning unit for e.g. building or vehicle - has wafer evaporator and refrigerant pre-cooler with valve permitting air to pass over heating coil if required

摘要

The air cooler consists of an air inlet duct (1) housing an evaporator heat exchanger (2). The inner tube is porous and is maintained in a wetted condition by a valve (10) and a water reservoir (5). The central tube of the evaporator is in series with the refrigerant circuit (6). Air evaporates the water in the evaporator-heat exchanger and cools the refrigerant, at the same time becoming humidified. The air then passes over a refrigerant pre-cooler (9) before entering the enclosure (40) to be cooled. The cooled air entering the enclosure consists of fresh air (8), recirculated air (7) or humidified air (8A).