The utility model discloses an external
circulation evaporator capable of discharging liquid automatically, which belongs to the technical field of evaporators and comprises a shell and a condensing
barrel, a heating plate is fixedly mounted in the shell, an inner container is fixedly mounted in the heating plate, a
screw cap is fixedly mounted at the top end of the shell, and a condensing box is fixedly mounted at the top end of the condensing
barrel. Communicating pipes are fixedly mounted at the top ends of the condensing box and the spiral cover, a connecting
pipe is fixedly mounted between the two communicating pipes, a condensing
barrel is fixedly mounted on the outer side of the connecting
pipe, a discharging round hole and an injection round hole are formed in the condensing barrel, and a discharging
pipe is fixedly mounted in the discharging round hole. Through cooperation of a plurality of structures,
evaporation and condensation operation of liquid can be efficiently carried out, temperature and liquid concentration can be monitored in real time, stability and safety of the operation process are ensured, an advanced
control system and precise sensing equipment are arranged, full-automatic operation can be achieved, a
forced circulation mode is adopted, and
energy conservation and emission reduction are achieved. The
heat transfer efficiency and the production capacity are improved.