Open refrigeration and dehumidification air conditioning unit

An open refrigeration and dehumidification air conditioning unit comprises a refrigeration unit and a dehumidification unit, wherein the dehumidification unit comprises a dehumidification loop composed of a generator, a concentrated solution tank, a dehumidifier and a cooler, an air outlet is formed in the top end of the generator, and a refrigerant solution flows in the dehumidification loop. The dehumidification unit further comprises a solar heater. The refrigeration unit comprises an evaporator, wherein an inlet of the evaporator is connected with a refrigerant solution supplementing pipeline, and an outlet of the evaporator is connected with the cooler and then is connected with the dehumidifier. The open refrigeration and dehumidification air conditioning unit utilizes solution circulation to achieve dehumidification, namely adopts solution dehumidification to replace traditional air conditioning dehumidification, and energy consumption is reduced. The refrigeration capacity of the refrigerant solution provided by the supplementing pipeline is reasonably utilized, a circulated dilute solution is cooled, the concentration and temperature of the solution in the dehumidifier are effectively controlled, the dehumidification effect can be more obvious, energy is saved, and efficiency is also improved.