A two-phase liquid cold plate and data center cooling system

Abstract

The utility model discloses a two -phase liquid cooling plate, including integral is horizontal board shape and has the liquid cooling plate of inner chamber, the liquid cooling plate one end is provided with the liquid inlet of two -phase cooling liquid inflow and with inner chamber intercommunication, the other end is provided with the liquid outlet of two -phase cooling liquid outflow and with inner chamber intercommunication, and the lower surface of liquid cooling plate is the heating surface, its characterized in that, still have a horizontal setting baffle in the inner chamber of liquid cooling plate, and the baffle divides into the air cavity of top and the liquid cavity of below, liquid inlet and liquid outlet are connected with liquid cavity respectively, still be provided with the gas -guiding structure in the liquid cavity and the air cavity intercommunication, still be connected with the gas outlet of the one end of air cavity and set up. The utility model discloses still a kind of data center cooling system using the above two -phase liquid cooling plate. The utility model overcomes the contradiction that the improvement of cooling liquid gasification efficiency in conventional two -phase liquid cooling plate can lead to flow efficiency reduction, overall better improve the cooling efficiency of liquid cooling plate.

Description

Technical Field

[0001] This utility model relates to the technical field of server cooling equipment for data center computer rooms, specifically to a two-phase liquid cooling plate. Background Technology

[0002] A liquid cooling plate is a hollow, plate-like structure that relies on the flow of coolant within its cavity to remove heat. It is a highly efficient heat dissipation solution widely used in electronic devices, electric vehicle batteries, data center servers, lasers, and wind power generation equipment. It is a core heat transfer component in liquid cooling systems, primarily used to efficiently transfer heat generated by heat-generating components (such as chips, battery modules, and IGBT modules) to the flowing coolant, which then carries the heat to an external radiator for dissipation into the environment. In data centers, liquid cooling plates are frequently used to cool servers or chip boards.

[0003] Two-phase liquid cooling plates refer to liquid cooling plates that use two-phase coolant as the cooling medium. During the heat exchange process, a portion of the coolant is heated and converted into a gaseous phase to better achieve heat exchange and improve the cooling effect. However, two-phase liquid cooling plates have the following drawbacks: Liquid cooling plates usually have fins or other structures in the inner cavity to increase the heat exchange area and improve heat exchange efficiency. However, the outlet pipe of the liquid cooling plate is a fixed-size pipe. Since both liquid and gaseous coolant in a two-phase liquid cooling plate need to be discharged through the outlet pipe, when the heat generated by the component to be cooled is high, the amount of gas generated inside the liquid cooling plate increases, which will squeeze the outlet space of the coolant and reduce the flow rate of the coolant. Thus, the higher the vaporization efficiency of the coolant, the lower the overall flow efficiency, which is contradictory and has a significant limiting effect on improving the heat exchange efficiency.

[0004] Therefore, how to better overcome the contradiction and reduce the limiting effect of phase change coolant vaporization on cooling efficiency has become a problem that needs to be considered and solved by those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to overcome the contradiction that the improvement of coolant vaporization efficiency will lead to the decrease of flow efficiency, and to provide a two-phase liquid cooling plate and data center cooling system that can better improve cooling efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A two-phase liquid cooling plate includes a horizontally shaped plate with an inner cavity. One end of the liquid cooling plate has an inlet for two-phase coolant to flow into and communicate with the inner cavity, and the other end has an outlet for two-phase coolant to flow out and communicate with the inner cavity. The lower surface of the liquid cooling plate is a heated surface. The inner cavity of the liquid cooling plate also has a horizontally arranged partition, which divides the inner cavity into an upper gas cavity and a lower liquid cavity. The inlet and outlet are respectively connected to the liquid cavity. The liquid cavity also has a gas guiding structure communicating with the gas cavity, and one end of the gas cavity is also connected to an outlet.

[0007] In this way, after the two-phase coolant enters the liquid chamber, it is heated by the heated surface, causing some of the coolant to vaporize. The vaporized gas is then guided through the gas guide structure into the upper gas chamber and flows out separately from the gas outlet. This completes the separation of liquid and gas, with most of the gas being discharged from the gas outlet, leaving only a small amount of gas at the liquid outlet. Therefore, it avoids the drawback of increased vaporization efficiency due to increased cooling temperature crowding out the liquid outlet space and affecting flow efficiency, thus improving the overall cooling efficiency of the liquid cooling plate.

[0008] Furthermore, the air guiding structure includes a vertically arranged air guiding column, which is made of a porous thermally conductive material with interconnected structures. The lower end of the air guiding column is fixed to the lower surface of the liquid cavity, and the upper end extends upward through the partition and enters the air cavity.

[0009] This air guide column effectively increases the heat-receiving area in contact with the coolant, causing bubbles to be generated rapidly within its internal pores. These bubbles, under their own upward force, flow upward along the air guide column and enter the air chamber. Thus, while increasing the heat-receiving area and improving vaporization efficiency, it also guides the generated gas, allowing it to enter the air chamber more effectively.

[0010] Furthermore, the size of the pores inside the air guide column gradually increases from bottom to top.

[0011] This helps reduce the resistance to the upward flow of gas generated in the air guide column. After the bubbles are generated in the air guide column, they gradually grow larger as they move upward and enter the upper air chamber.

[0012] Furthermore, the upper end of the air guide column extends upwards into the air chamber a certain distance. This allows the liquid that has not yet vaporized at the upper end of the air guide column to be better heated and vaporized within the air chamber, reducing the proportion of liquid entering the air chamber.

[0013] Furthermore, the air guide columns are multiple and evenly distributed within the liquid cavity.

[0014] This utility model also discloses a data center cooling system, including multiple horizontally arranged servers spaced vertically. Each server has a corresponding two-phase liquid cooling plate attached to its top. The liquid inlet of each two-phase liquid cooling plate is connected to the liquid inlet manifold, the liquid outlet of each two-phase liquid cooling plate is connected to the liquid outlet manifold, and the liquid outlet of each two-phase liquid cooling plate is connected to the gas outlet manifold. The gas outlet manifold is connected to a condenser container, and a return liquid pipe is provided at the lower end of the condenser container, which is connected to the liquid outlet manifold.

[0015] In this way, the two-phase liquid cooling plates of each row of servers can centrally receive liquid, centrally discharge liquid and gas. The discharged gas is collected in the condenser, where most of the gas is condensed. The upper part of the gas, mixed with the condensate, flows back to the main outlet pipe for discharge. Then, the gas mixed in is treated uniformly (this part of the structure is the same as the cooling system composed of conventional liquid cooling plates, and will not be described in detail here). In this way, the condenser centrally condenses the gas discharged from each liquid cooling plate, and the generated liquid flows back into the outlet pipe. The outlet pipe contains only a small amount of gas, which no longer affects its flow efficiency.

[0016] Furthermore, the condensation container is also equipped with a cooling heat exchange coil, and the cooling heat exchange coil is connected to a heat exchange circulation system.

[0017] This is because the gas is generated by the cooling liquid being heated, so the temperature of the generated exhaust gas is usually higher than the temperature of the exhaust cooling liquid. Therefore, using a heat exchange coil with good cooling properties can exchange this part of the heat as a heat source, and at the same time, it can better improve the condensation efficiency and effect of the condenser on the gas.

[0018] In summary, this invention overcomes the contradiction that improving the vaporization efficiency of the coolant in conventional two-phase liquid cooling plates leads to a decrease in flow efficiency, and thus improves the overall cooling efficiency of the liquid cooling plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the two-phase liquid cooling plate of this utility model.

[0020] Figure 2 This is a schematic diagram of the data center cooling system of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to specific embodiments.

[0022] Optimal Implementation: See Figure 1-2As shown, a two-phase liquid cooling plate includes a liquid cooling plate 1 that is horizontally plate-shaped and has an inner cavity. One end of the liquid cooling plate 1 is provided with an inlet 2 for two-phase coolant to flow in and communicates with the inner cavity, and the other end is provided with an outlet 3 for two-phase coolant to flow out and communicates with the inner cavity. The lower surface of the liquid cooling plate 1 is a heated surface. The feature is that the inner cavity of the liquid cooling plate also has a horizontally arranged partition 4, which divides the inner cavity into an upper gas cavity 5 and a lower liquid cavity 6. The inlet 2 and the outlet 3 are respectively connected to the liquid cavity 6. The liquid cavity 6 is also provided with a gas guiding structure that communicates with the gas cavity. One end of the gas cavity is also connected to an outlet 8.

[0023] In this way, after the two-phase coolant enters the liquid chamber, it is heated by the heated surface, causing some of the coolant to vaporize. The vaporized gas is then guided through the gas guide structure into the upper gas chamber and flows out separately from the gas outlet. This completes the separation of liquid and gas, with most of the gas being discharged from the gas outlet, leaving only a small amount of gas at the liquid outlet. Therefore, it avoids the drawback of increased vaporization efficiency due to increased cooling temperature crowding out the liquid outlet space and affecting flow efficiency, thus improving the overall cooling efficiency of the liquid cooling plate.

[0024] The air guiding structure includes a vertically arranged air guiding column 7, which is made of a porous thermally conductive material with interconnected structures. The lower end of the air guiding column is fixed to the lower surface of the liquid cavity, and the upper end extends upward through the partition and enters the air cavity.

[0025] This air guide column effectively increases the heat-receiving area in contact with the coolant, causing bubbles to be generated rapidly within its internal pores. These bubbles, under their own upward force, flow upward along the air guide column and enter the air chamber. Thus, while increasing the heat-receiving area and improving vaporization efficiency, it also guides the generated gas, allowing it to enter the air chamber more effectively.

[0026] The size of the pores inside the air guide column 7 gradually increases from bottom to top.

[0027] This helps reduce the resistance to the upward flow of gas generated in the air guide column. After the bubbles are generated in the air guide column, they gradually grow larger as they move upward and enter the upper air chamber.

[0028] The upper end of the air guide column 7 extends upwards into the air chamber a certain distance. This allows the liquid that has not yet vaporized at the upper end of the air guide column to be better heated and vaporized within the air chamber, reducing the proportion of liquid entering the air chamber.

[0029] The air guide columns 7 are multiple and evenly distributed within the liquid cavity.

[0030] This utility model also discloses a data center cooling system, see [link to relevant documentation] Figure 2As shown, the system includes multiple horizontally arranged servers 9 spaced vertically. Each server 9 has a corresponding two-phase liquid cooling plate attached to its top. The liquid inlet of each two-phase liquid cooling plate is connected to the liquid inlet manifold 10, the liquid outlet of each two-phase liquid cooling plate is connected to the liquid outlet manifold 11, and the liquid outlet of each two-phase liquid cooling plate is connected to the gas outlet manifold 12. The gas outlet manifold 12 is connected to a condenser 13, and a return pipe 14 is provided at the lower end of the condenser 13. The return pipe 14 is connected to the liquid outlet manifold 11.

[0031] In this way, the two-phase liquid cooling plates of each row of servers can centrally receive liquid, centrally discharge liquid and gas. The discharged gas is collected in the condenser, where most of the gas is condensed. The upper part of the gas, mixed with the condensate, flows back to the main outlet pipe for discharge. Then, the gas mixed in is treated uniformly (this part of the structure is the same as the cooling system composed of conventional liquid cooling plates, and will not be described in detail here). In this way, the condenser centrally condenses the gas discharged from each liquid cooling plate, and the generated liquid flows back into the outlet pipe. The outlet pipe contains only a small amount of gas, which no longer affects its flow efficiency.

[0032] The condenser 13 is also equipped with a cooling heat exchange coil 15, which is connected to a heat exchange circulation system.

[0033] This is because the gas is generated by the cooling liquid being heated, so the temperature of the generated exhaust gas is usually higher than the temperature of the exhaust cooling liquid. Therefore, using a heat exchange coil with good cooling properties can exchange this part of the heat as a heat source, and at the same time, it can better improve the condensation efficiency and effect of the condenser on the gas.

Claims

1. A two-phase liquid cooling plate comprising a liquid cooling plate in the shape of a whole horizontal plate with an internal cavity, one end of the liquid cooling plate being provided with a liquid inlet for the inflow of two-phase cooling liquid and being in communication with the internal cavity, the other end of the liquid cooling plate being provided with a liquid outlet for the outflow of two-phase cooling liquid and being in communication with the internal cavity, the lower surface of the liquid cooling plate being a heat receiving surface, characterized in that, The liquid cooling plate also has a horizontally arranged partition in its inner cavity, which divides the inner cavity into an upper gas cavity and a lower liquid cavity. The liquid inlet and liquid outlet are respectively connected to the liquid cavity. The liquid cavity is also provided with a gas guiding structure that communicates with the gas cavity. One end of the gas cavity is also connected to a gas outlet.

2. The two-phase liquid cold plate of claim 1, wherein, The air guiding structure includes vertically arranged air guiding columns, which are made of thermally conductive materials with a porous structure that are interconnected in various places. The lower end of the air guiding column is fixed to the lower surface of the liquid cavity, and the upper end extends upward through the partition and enters the air cavity.

3. The two-phase liquid cooling plate as described in claim 2, characterized in that, The size of the pores inside the air guide column gradually increases from bottom to top.

4. The two-phase liquid cooling plate as described in claim 2, characterized in that, The upper end of the air guide column extends upwards and enters the air chamber a certain distance.

5. The two-phase liquid cooling plate as described in claim 2, characterized in that, The air guide columns are multiple and evenly distributed within the liquid cavity.

6. A data center cooling system comprising a plurality of servers arranged horizontally and spaced vertically, characterized in that, Each server is fitted with a two-phase liquid cooling plate as described in any one of claims 1-5. The liquid inlet of each two-phase liquid cooling plate is connected to the liquid inlet manifold, the liquid outlet of each two-phase liquid cooling plate is connected to the liquid outlet manifold, the liquid outlet of each two-phase liquid cooling plate is connected to the gas outlet manifold, the gas outlet manifold is connected to a condenser, and a return pipe is provided at the lower end of the condenser, which is connected to the liquid outlet manifold.

7. The data center cooling system as described in claim 6, characterized in that, The condenser is also equipped with a heat exchange coil for cooling, and the heat exchange coil is connected to a heat exchange circulation system.

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