Patent ID: 6883602

Claim:
An evaporator unit in combination with the air conditioning system of a motorized passenger vehicle, said unit including a housing enclosed inside an air conditioned section of the vehicle, said housing having a return air inlet and a supply air outlet and a flow passage that connects the air inlet to the air outlet, fan means for moving air through said passage between the air inlet and the air outlet, an evaporator heat exchanger mounted in the flow passage for cooling air moving through said passage, a heating coil mounted in said flow passage, a first circulating means for passing engine coolant from the motorized vehicle engine through said heating coil to heat the air moving through said flow passage, a dehumidifying heat exchanger mounted in said flow passage for removing moisture from the air moving through the flow passage, and a second circulating means for passing a cooling fluid through a closed dehumidifying circuit separate from said air conditioning system and including an outdoor heat exchanger exposed to the outside air stream created by movement of the vehicle and not including a compressor, and through said dehumidifying heat exchanger for cooling air moving through said flow passage.