Fang Wang

Fang-Shou Lee

Cho-Han Lee

The present invention discloses a server assembly with a closed condensing circuit, which is particularly applied in a two-phase liquid immersion cooling apparatus. The server assembly comprises a fluid-tight chassis, a server, and a condensing device. A working fluid is maintained within the chassis. The server is at least partially submerged within the working fluid. The condensing device comprising a casing and a plurality of condensing pipes is disposed above the chassis and fixed thereto. When the server starts operating, a large amount of heat is dissipated. A coolant is vaporized into a rising coolant vapor by absorbing heat dissipated from the server. Upon contact with the condensing device, the coolant vapor is condensed back into a cooling liquid that is returned to the coolant-containing chassis, thereby completely condensing all the coolant vapor.

Server assembly with closed condensing circuit and cooling apparatus containing the same

The present invention discloses an openable and closeable condensing apparatus, which is particularly applied in a two-phase liquid immersion cooling system. When servers start to operate, a large amount of heat will be dissipated from servers. The coolant is vaporized into a rising coolant vapor by absorbing heat dissipated from servers. Upon contact with a condenser, the coolant vapor is condensed back into a cooling liquid that is returned to the coolant-containing tank. By the heat exchange cycle in which heat dissipated from serves is absorbed by the coolant, servers can be maintained at a normal working temperature. However, in the process of condensation, the rising coolant vapor tends to scatter in all directions resulting in a failure to condense all of the coolant vapor. Therefore, the uncondensed coolant vapor will cause the pressure in the system to gradually rise, which eventually leads to an ineffective cooling of servers. In view of this problem, the disclosed invention provides an enclosed-type condensing apparatus for completely condensing all of the coolant vapor.

Openable and closeable condensing apparatus

The present invention discloses a two-phase immersion-cooling micro-grooved boiler, which is mainly used for heat dissipation of heat generating objects. The boiler comprises a heat transfer member and a capillary layer positioned in tight contact with a surface of the heat transfer member. The capillary layer has an array of micro-grooves which divides the capillary layer into a plurality of heat dissipating units. The bottom surface of the micro-grooves is coated with a thermal resistance layer. While the boiler operates, the working liquid can flow into the heat dissipating units from the sidewall of the micro-grooves without being blocked from contact with the heat transfer member by boiling-triggered bubbles. As a result, dry-out of the heat transfer member can be avoided, thereby improving the heat exchange efficiency of the boiler and the flow-back rate of the working fluid.

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Livermore, CA, United States of America

Fang Wang