Immersed liquid-cooling server and waste heat recovery system thereof

A waste heat recovery system, comprising an immersion box body, an evaporation box body, a heat exchanger, a circulating pipe and a first driving assembly;

• wherein the immersion box body is filled with a single-phase coolant for immersed mounting of server nodes;
• the evaporation box body is filled with a two-phase coolant capable of generating gas-liquid phase change, and the evaporation box body is provided with an extending portion;
• and the extending portion extends into the immersion box body and is in contact with the single-phase coolant;
• a water inlet of the heat exchanger and a water outlet of the heat exchanger are respectively communicated to different positions of the immersion box body to dissipate heat from the single-phase coolant;
• a pipe orifice of one end of the circulating pipe is communicated to a bottom of the evaporation box body, and a pipe orifice of the other end of the circulating pipe is communicated to a top of the evaporation box body;
• and
• the first driving assembly comprises a first driving impeller mounted in the circulating pipe, a first driven impeller mounted in a pipeline between the water inlet of the heat exchanger and the immersion box body, and a first transmission component connected between the first driving impeller and the first driven impeller.