Immersion heat dissipation system having two circulations and heat dissipation assembly

An immersion heat dissipation system having two circulations comprising:

• a tank body comprising an accommodating structure, wherein the accommodating structure is adapted to accommodate an electronic device;
• a first circulation module comprising a first circulation pipe unit and a first fluid driving unit, wherein the first circulation pipe unit is arranged on an outside of the tank body and in communication with the accommodating structure;
• the first fluid driving unit is connected to the first circulation pipe unit;
• and the accommodating structure comprises:
• an extension portion, comprising an extended wall and an upper opening, wherein the upper opening is on the extended wall;
• a bottom portion, in communication with the extension portion and having a lower opening, wherein the lower opening is on a side wall of the bottom portion;
• and the accommodating structure is in communication with the first circulation pipe unit through the upper opening and the lower opening;
• and
• a heat source portion, wherein the bottom portion is in communication with the extension portion through the heat source portion;
• a side wall of the heat source portion is connected to the side wall of the bottom portion and the extended wall to form an outer side portion;
• and the first circulation pipe unit and the first fluid driving unit are arranged in the outer side portion;
• and;
• a second circulation module, outside of the tank body, wherein the second circulation module is configured to exchange heat between air outside the tank body and liquid in the accommodating structure.