Closed loop liquid cooler and electronic device using the same

A closed loop liquid cooler;

• comprising:
• a first liquid cooling module comprising a first heat exchanger (111), a first pump body (112), a first cold plate (113) and a first connection pipeline (114) for connecting the first heat exchanger (111) with the first pump body (112) and first cold plate (113) together;
• a second liquid cooling module comprising a second heat exchanger (121), a second pump body (122), a second cold plate (113) and a third connection pipeline (124) for connecting the second heat exchanger (121) with the second pump body (122) and second cold plate (123) together;
• a second connection pipeline (115) for connecting the first cold plate (113) with the second heat exchanger (121);
• a fourth connection pipeline (125) for connecting the second cold plate (123) with the first heat exchanger (111);
• wherein a cooling reflux at an output end of the first cold plate (111) of the first liquid cooling module is outputted to a cooling liquid input end of the second heat exchanger (121) of the second liquid cooling module;
• and a cooling reflux at an output end of the second cold plate (123) of the second liquid cooling module is outputted to a cooling liquid input end of the first heat exchanger (111) of the first liquid cooling module.