The utility model relates to the technical field of
fresh air treatment, and discloses a dehumidification and humidification
fresh air system which comprises a shell, a first solution box, a heat exchange
system, a first liquid
discharge pipeline, a first liquid inlet pipeline, a first circulating water pump and a first fan. During use, the first circulating water pump is controlled to work, the first liquid inlet pipeline can extract a
hydrochloric acid solution at the bottom of the first solution tank, and then the
hydrochloric acid solution enters the first
heat exchanger. And after being cooled by the first
heat exchanger, the solution is uniformly sprayed on the top of the first solution tank through the first drainage pipeline. And then, the first fan is controlled to work, and outdoor air can enter the first solution box through the
fresh air inlet and is discharged indoors through the fresh air outlet. In the flowing process of outdoor air in the first solution box, the outdoor air can make contact with the
hydrochloric acid solution, and therefore heat and
humidity exchange is completed. And compared with a freezing dehumidification mode,
bacteria breeding can be avoided, continuous work can be achieved, and continuous dehumidification can be achieved while the air quality is guaranteed.