pressure refrigerant that has already passed through the evaporator 15 with the result that the energy efficiency of the refrigerating device 10 can be enhanced and hence the energy efficiency of the air conditioner of the invention can further be enhanced moreover the refrigerating device 10 employs co 2 as the refrigerant thereby being capable of easily obtaining the high temperature heat source having no combustibility and toxicity for regenerating the adsorbent further the air conditioner in the embodiment 1 employs the drain water generated by the cooling operation of the evaporator 15 and stored in the drain tank 21 as the water for the humidification at the humidifier 8 thereby being capable of saving water for use in the humidification moreover a water source for humidification can be simplified the embodiment 2 will subsequently be explained with reference to fig5 and 6 fig5 is a view for explaining a construction of an air conditioner according to an embodiment 2 of the present invention and fig6 is a view for explaining a construction of a cross flow sensible heat exchanger in the air conditioner it is to be noted that in these figures the same elements as those in the embodiment 1 are marked with the same numerals and their explanations are omitted in the air conditioner of the embodiment 2 the rotary sensible heat exchanger 6 in the embodiment 1 is replaced with a cross flow sensible heat exchanger 60 and each speed of rotation of the supply fan 31 exhaust fan 41 and compressor 11 is.