Abstract: The invention is an air conditioning unit 10 consisting of a housing 11 having at least one air inlet 21 for receiving air to be conditioned and at least one outlet 19 for discharging conditioned air, at least one fan 24 for moving air from the inlet 21 to the outlet 19, an air to air heat exchanger 26 of the type that cools the air by diverting and cooling a portion of the air through an evaporative cooling means, heat exchange occurring across a plurality of barriers 27 between the evaporatively cooled air and said incoming air, a vapour compression-type cooling system having an evaporator coil 54 through which the outlet stream of air passes for further cooling of the outlet air, a condenser coil 55 through which the evaporatively cooled air, stream that exits the air to air heat exchanger 26 passes, and a control system 60 that at least determines the temperature of the room 12 air and controls the operation of the air-conditioner to operate only the air to air heat exchanger 26 when the temperature is ma

Abstract: A self-contained air conditioner unit comprises an enclosure including a first intake aperture positioned to communicate with outside ambient air and a first outlet aperture positioned to communicate with a habitable space in which the air conditioner is placed, and a second intake aperture positioned to communicate with a habitable space in which the air conditioner is placed, and a second outlet aperture positioned to communicate with ambient air outside of the habitable space. A water reservoir is disposed at the bottom of the enclosure. A heat exchanger is disposed in the cabinet over the water reservoir, and comprises a plurality of vertically disposed, alternating wet air channels and dry air channels, the alternating wet air channels and dry air channels defined by substantially parallel opposing heat-transfer partitions.

Abstract: A self-contained air conditioner unit comprises an enclosure including a first and second intake apertures positioned to communicate with outside ambient air and first, second, and third outlet apertures positioned to communicate with a habitable space in which the air conditioner is placed. A water reservoir is disposed at the bottom of the enclosure. A two-section heat exchanger is disposed in the cabinet over the water reservoir, each section comprising a plurality of vertically disposed, alternating wet air channels and dry air channels defined by substantially parallel opposing heat-transfer partitions. The first-section dry-air channels communicate with a pre-mixing chamber at intake ends thereof and an air-distributing chamber at outlet ends thereof. Each first-section wet channel communicates with the distributing chamber at intake ends thereof and the second outlet aperture at outlet ends thereof.