Turbo expander with uniform liquid distribution function and refrigeration system

The invention discloses a turbo expander with a uniform liquid distribution function and a refrigeration system. By means of the turbo expander and the refrigeration system, uniform liquid supply is achieved for all flow paths of an evaporator, and the throttling loss in the refrigeration system can be recycled. A liquid supply cavity at the center and an annular distribution cavity in the circumference are formed in a distribution body of the expander. The annular distribution cavity is divided into a plurality of distribution chambers through partition plates. Each distribution chamber is communicated with a liquid distribution pipe. A high-pressure refrigerant liquid supply pipe communicated with the liquid supply cavity is arranged at the center of one end face of the distribution body. A penetrating rotating shaft is installed in the liquid supply cavity. The portion, located in the liquid supply cavity, of the rotating shaft is provided with a plurality of rotating impellers. An opening facing the liquid supply cavity is formed in the inner side of each distribution chamber. The lengths of the openings in the distribution chambers are equal. The high-pressure refrigerant liquid supply pipe, the rotating shaft, the rotating impellers, the liquid supply cavity and the annular distribution cavity are coaxial. By means of the expander, the heat exchange performance of the evaporator is improved, and the efficiency of the refrigeration system is improved.