Abstract: An air-conditioning system is provided for a motor vehicle. That system includes a vacuum enclosure having a refrigerant, a first section and a second section. The system further includes a radiator, a core and a phase change material vessel downstream from the core. A conduit and valve system operate the air-conditioning system in two modes of operation.

Abstract: Air conditioner units are provided. A unit includes an outdoor heat exchanger, an indoor heat exchanger, and a compressor. The unit further includes a bulkhead disposed between the outdoor heat exchanger and the indoor heat exchanger. The unit further includes a vent aperture defined in the bulkhead. The unit further includes a dehumidification system disposed at least partially within the outdoor portion, the dehumidification system including an evaporator configured for removing heat from outdoor air flowing therethrough, a condenser configured for adding heat to outdoor air flowing therethrough, and an auxiliary compressor in fluid communication with the evaporator and the condenser.