Liquid cooled heat dissipation device

1. A liquid cooled heat dissipation device comprising:

a housing, comprising: a top plate, a bottom plate, a front plate, a rear plate, and two opposite side plates, wherein the top plate, the bottom plate, the front plate, the rear plate, and the two side plates form an accommodation space;

at least two cooling fin modules disposed in the accommodation space;

an input pipe, disposed on the top plate, the front plate, the rear plate, or one of the side plates of the housing, communicating with the accommodation space; and

an output pipe, disposed on the top plate, the front plate, the rear plate, or the other one of the side plates of the housing, communicating with the accommodation space,

wherein the at least two cooling fin modules have different arrangement densities and the at least two cooling fin modules have different fin thicknesses, and a cooling liquid flows into the housing via the input pipe, passes through the at least two cooling fin modules, and then flows out of the housing via the output pipe,

the at least two cooling fin modules are disposed between the two flow paths,

the bottom plate is configured to contact a heat source and the input pipe and the output pipe are not disposed on the bottom plate,

the bottom plate comprises an inner surface and an outer surface opposite to each other, wherein one of the at least two cooling fin modules is in contact with the inner surface, another one of the at least two cooling fin modules is in contact with the top plate, and the outer surface is configured to contact the heat source, and

the one of the at least two cooling fin modules in contact with the inner surface has an arrangement density lower than an arrangement density of the another one of the at least two cooling fin modules.

2. The liquid cooled heat dissipation device according to claim 1 , wherein an extension direction of the at least two cooling fin modules is parallel to the front plate and the rear plate, and the cooling liquid flows from one of the flow paths to the other one of the flow paths along the extension direction.

3. The liquid cooled heat dissipation device according to claim 1 , wherein any one fin thickness of the fins of the one of the at least two cooling fin modules is greater than any one fin thickness of the fins of the another one of the at least two cooling fin modules.

4. The liquid cooled heat dissipation device according to claim 1 , wherein the at least two cooling fin modules respectively comprise a plurality of fin grooves, and the plurality of fin grooves are respectively oriented toward the two side plates, wherein the cooling liquid flows into the plurality of fin grooves to pass through the at least two cooling fin modules.

5. The liquid cooled heat dissipation device according to claim 4 , wherein any one fin groove width of the fins of one of the at least two cooling fin modules is greater than any one fin groove width of the fins of another one of the at least two cooling fin modules.

6. The liquid cooled heat dissipation device according to claim 1 , wherein the at least two cooling fin modules are plural and are stacked on each other between the top plate and the bottom plate.

7. The liquid cooled heat dissipation device according to claim 1 , further comprising at least one partition plate disposed between the at least two cooling fin modules and leaning in the front plate and the rear plate.

8. The liquid cooled heat dissipation device according to claim 7 , wherein the at least one partition plate and the at least two cooling fin modules are integrally formed.

9. The liquid cooled heat dissipation device according to claim 1 , wherein the at least two cooling fin modules are spaced apart from the two side plates to form two flow paths, and the input pipe and the output pipe respectively communicate with the two flow paths.