Indirect evaporation air conditioning system based on solution dehumidification for data center

The invention discloses an indirect evaporation air conditioning system based on solution dehumidification for a data center. A multi-stage indirect unit based on solution dehumidification comprises a unit shell, a fresh air and return air mixing section, a solution dehumidification section, a solution regeneration section, a refrigerating system, a multi-stage indirect evaporation section and an air supply section. Compared with an existing cooling mode of the data center, solution dehumidification is utilized, air entering multi-stage indirect evaporation meets the air humidity requirement for efficient operation of the data center, meanwhile, the refrigerating system is utilized for regenerating the solution, the data center can be used under different room wind meteorological conditions, the PUE value of the data center is effectively reduced, and the data center cooling efficiency is improved. The cooling reliability is improved while the refrigeration energy consumption of the data center is greatly red