Cooling distribution system and data center

Abstract

The embodiment of the invention provides a cooling distribution system and a data center. The cooling distribution system comprises a heat exchange pool; the oil return pipe is communicated with the equipment to be cooled, extends into the heat exchange pool and is communicated with the heat exchange pool; the liquid inlet pipe extends into the heat exchange pool and is communicated with the heat exchange pool, the oil return pipe and the liquid inlet pipe are used for introducing cooling oil and cooling water into the heat exchange pool respectively, and the cooling oil and the cooling water are mixed for heat exchange; the separation tank is communicated with the heat exchange tank through a communicating pipe, and water-oil mixed liquid obtained after heat exchange of the heat exchange tank enters the separation tank through the communicating pipe for oil-water separation; the oil supply pipe is communicated with the equipment to be cooled, the oil supply pipe is communicated with the separation tank, and the cooling oil separated in the separation tank enters the oil supply pipe; the liquid outlet pipe is communicated with the separation tank, and the cooling water separated in the separation tank enters the liquid outlet pipe. The problem that in the related technology, the refrigerating capacity of a cooling distribution system is low is solved.

Description

Technical Field

[0001] Embodiments of the present application relate to the computer field, and in particular, to a cooling distribution system and a data center. Background Art

[0002] The Cooling Distribution Units (CDU) is a thermal management device based on liquid cooling technology. The Cooling Distribution Units (CDU) is connected to the liquid supply system on the primary side and the equipment to be cooled (such as servers, etc.) on the secondary side. The liquid supply system provides a low-temperature heat dissipation medium, which cools the cooling medium circulating between the equipment to be cooled and the Cooling Distribution Units (CDU). That is, the high-temperature cooling medium of the equipment to be cooled enters the Cooling Distribution Units (CDUs), where it exchanges heat with the heat dissipation medium. After the temperature of the cooling medium is reduced, it is passed into the equipment to be cooled again to dissipate the heat. This cycle is repeated to achieve continuous overall heat dissipation of the equipment to be cooled.

[0003] However, as the heat dissipation demand of servers further increases, the water-to-water heat exchange solution that uses cooling water as both the heat dissipation medium and the cooling medium is limited by factors such as the size of the heat exchanger and the heat exchange efficiency, which limits the cooling capacity of the CDU system. The cooling capacity is low, and the conventional CDU system with a cooling capacity of several hundred kW can no longer meet the needs of high-power server data centers. In addition, due to the risk of liquid leakage from liquid-cooled servers causing significant equipment losses, synthetic oil and other oils can currently be used as secondary cooling media. Although oil secondary cooling media can eliminate the risk of server leakage, the cooling capacity of oil-to-water heat exchange is even lower. Summary of the invention

[0004] The embodiments of the present application provide a cooling distribution system and a data center to at least solve the problem of low cooling capacity of the cooling distribution system in the related art.

[0005] According to one embodiment of the present application, a cooling distribution system is provided, including: a heat exchange tank; an oil return pipe connected to a device to be cooled, the oil return pipe extending into the heat exchange tank and connected to the heat exchange tank; a liquid inlet pipe, the liquid inlet pipe extending into the heat exchange tank and connected to the heat exchange tank, the oil return pipe and the liquid inlet pipe respectively pass cooling oil and cooling water into the heat exchange tank, and mix the cooling oil and cooling water for heat exchange; a separation tank, the separation tank is connected to the heat exchange tank through a connecting pipe, and the water-oil mixture after heat exchange in the heat exchange tank enters the separation tank through the connecting pipe for oil-water separation; an oil supply pipe connected to the device to be cooled, the oil supply pipe is connected to the separation tank, and the cooling oil separated in the separation tank enters the oil supply pipe; a liquid outlet pipe, the liquid outlet pipe is connected to the separation tank, and the cooling water separated in the separation tank enters the liquid outlet pipe.

[0006] In an exemplary embodiment, both the oil return pipe and the liquid inlet pipe have an outlet end located in the heat exchange tank, and the outlet end of the oil return pipe is located below the outlet end of the liquid inlet pipe.

[0007] In an exemplary embodiment, the outlet end of the oil return pipe is located in the bottom area of ​​the heat exchange tank, and the outlet end of the liquid inlet pipe is located in the top area of ​​the heat exchange tank.

[0008] In an exemplary embodiment, the cooling distribution system also includes a rectifier, which is arranged in the separation tank and is inclined. The outlet end of the connecting pipe is located below the rectifier, and the inlet end of the oil supply pipe is located above the rectifier. The cooling oil in the oil-water mixture introduced into the connecting pipe is collected through the rectifier.

[0009] In an exemplary embodiment, there are multiple fairings, wherein fairings are provided at opposite side walls of the separation tank, and the inclination directions of the opposite fairings are opposite; and / or at least some of the fairings are arranged in longitudinal intervals.

[0010] In an exemplary embodiment, the cooling distribution system also includes a circulation pipe, one end of which is located in the top area of ​​the separation tank, and the other end of the circulation pipe is connected to the connecting pipe. The oil-water mixture in the upper layer of the separation tank flows to the bottom area of ​​the separation tank via the circulation pipe and the connecting pipe.

[0011] In an exemplary embodiment, the cooling distribution system also includes: a filter, a filter is arranged on the return oil pipe and / or the liquid inlet pipe; an inlet first pressure sensor, an inlet first pressure sensor is arranged on the return oil pipe and / or the liquid inlet pipe, and the inlet first pressure sensor is located on the upstream side of the filter; an inlet second pressure sensor, an inlet second pressure sensor is arranged on the return oil pipe and / or the liquid inlet pipe, and the inlet second pressure sensor is located on the downstream side of the filter; an inlet temperature sensor, an inlet temperature sensor is arranged on the return oil pipe and / or the liquid inlet pipe; an inlet flow sensor, an inlet flow sensor is arranged on the return oil pipe and / or the liquid inlet pipe; a regulating valve, the regulating valve is arranged on the liquid inlet pipe; an outlet pressure sensor, an outlet pressure sensor is arranged on the oil supply pipe and / or the liquid outlet pipe; an outlet temperature sensor, an outlet temperature sensor is arranged on the oil supply pipe and / or the liquid outlet pipe.

[0012] In an exemplary embodiment, the cooling distribution system also includes: a liquid level sensor, a liquid level sensor is arranged in the heat exchange tank and / or the separation tank, and liquid level sensors are arranged at different height positions in the heat exchange tank and / or the separation tank to detect the upper and lower limits of the liquid level, or detect bubbles; and / or a pump body, a pump body is arranged on the return oil pipe, the connecting pipe, the oil supply pipe, and the liquid outlet pipe, and the pump body provides power for the liquid flow.

[0013] In an exemplary embodiment, the cooling distribution system includes a box body, in which a heat exchange pool, a separation pool and a control area separated from each other are formed, the heat exchange pool and the separation pool are laterally separated, the height of the separation pool is higher than the height of the heat exchange pool, the control area is located above the heat exchange pool, and at least one of an electrical box, an electric control box and a frequency conversion box is arranged in the control area; the box body also has a transition area, the transition area is located between the heat exchange pool and the control area, the return oil pipe and the liquid inlet pipe extend into the transition area from the side wall of the transition area, and extend into the heat exchange pool below from the bottom surface of the transition area, and the outlet end of the return oil pipe extends to the bottom area of ​​the heat exchange pool, and the outlet end of the liquid inlet pipe extends to the top area of ​​the heat exchange pool; the cooling distribution system also includes a rectifier, the rectifier is arranged in the middle area of ​​the separation pool, and the rectifier is inclined, the outlet end of the connecting pipe is located below the rectifier, the inlet end of the oil supply pipe is located above the rectifier, and the inlet end of the liquid outlet pipe is located below the outlet end of the connecting pipe.

[0014] According to another embodiment of the present application, a data center is provided, including a server, a cooling system and the above-mentioned cooling distribution system, the return oil pipe and the oil supply pipe of the cooling distribution system are connected to the liquid cooling pipeline of the server, and the liquid inlet pipe and the liquid outlet pipe of the cooling distribution system are connected to the cooling system.

[0015] The technical solution of the present invention is applied, by setting a heat exchange pool and a separation pool, wherein the heat exchange pool plays a role of heat exchange, and the separation pool plays a role of separation. In this way, the cooling medium of the server on the secondary side waiting for the heat dissipation device to dissipate heat can use cooling oil, and the cooling system on the primary side can use low-temperature cooling water. The return oil pipe passes the cooling oil heated in the heat dissipation device into the heat exchange pool, and the liquid inlet pipe also passes the cooling water into the heat exchange pool. The oil and water are in direct contact in the heat exchange pool for heat exchange. At the same time, the setting of the separation pool enables the oil-water mixture formed by heat exchange in the heat exchange pool to enter the separation pool through the connecting pipe, and the oil and water are separated in the separation pool. Since the density of the cooling oil is smaller than that of the cooling water, the cooling oil will gather upwards and form an oil layer on the water surface. The cooling oil on the top can be returned to the server through the oil supply pipe for recycling, and the cooling water is returned to the cooling system through the liquid outlet pipe for recycling. Through the above-mentioned setting, on the one hand, full use is made of the heat conduction and forced heat convection formed between oil and water, especially the heat transfer resistance of heat convection is small and the heat transfer area is larger, so that the heat transfer efficiency of heat convection between oil and water is usually much higher than that of heat conduction, thereby greatly improving the heat exchange and cooling capacity of the system, which is several times or even dozens of times higher than the conventional water-water inter-wall heat exchange solution, expanding the operating range of the computer room cooling system and effectively saving power consumption. On the other hand, the system is recycled through the separation tank, so that the cooling distribution system can work continuously. At the same time, due to the significant increase in the cooling capacity of a single cooling distribution system, the number of cooling distribution systems configured is naturally reduced, the available area of ​​the cabinet is increased, the operating range of the computer room cooling system is expanded, the cooling power consumption is effectively saved, and the PUE of the entire data center is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the structure of the cooling distribution system of the present application;

[0017] Figure 2 yes Figure 1 Piping diagram of the cooling distribution system in .

[0018] The above drawings include the following reference numerals:

[0019] 10. Heat exchange tank; 20. Oil return pipe; 30. Liquid inlet pipe; 40. Separation tank; 50. Connecting pipe; 60. Oil supply pipe; 70. Liquid outlet pipe; 80. Rectifier; 90. Circulation pipe; 100. Filter; 110. First inlet pressure sensor; 120. Second inlet pressure sensor; 130. Inlet temperature sensor; 140. Inlet flow sensor; 150. Regulating valve; 160. Outlet pressure sensor; 170. Outlet temperature sensor; 180. Liquid level sensor; 190. Pump body; 200. Control area; 201. Electrical box; 202. Electric control box; 203. Frequency converter; 210. Transition area. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0022] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0023] In order to solve the problem of low cooling capacity of the cooling distribution system in the related art, an embodiment of the present application provides a cooling distribution system and a data center.

[0024] like Figure 1 and Figure 2 A cooling distribution system shown in the figure includes a heat exchange tank 10, an oil return pipe 20 connected to the equipment to be cooled, a liquid inlet pipe 30, a separation tank 40, an oil supply pipe 60 connected to the equipment to be cooled, and a liquid outlet pipe 70, wherein the oil return pipe 20 extends into the heat exchange tank 10 and is connected to the heat exchange tank 10; the liquid inlet pipe 30 extends into the heat exchange tank 10 and is connected to the heat exchange tank 10, the oil return pipe 20 and the liquid inlet pipe 30 respectively pass cooling oil and cooling water into the heat exchange tank 10, and the cooling oil and cooling water are mixed for heat exchange; the separation tank 40 is connected to the heat exchange tank 10 through a connecting pipe 50, and the water-oil mixture after heat exchange in the heat exchange tank 10 enters the separation tank 40 through the connecting pipe 50 for oil-water separation; the oil supply pipe 60 is connected to the separation tank 40, and the cooling oil separated in the separation tank 40 enters the oil supply pipe 60; the liquid outlet pipe 70 is connected to the separation tank 40, and the cooling water separated in the separation tank 40 enters the liquid outlet pipe 70.

[0025] In this embodiment, a heat exchange pool 10 and a separation pool 40 are provided, wherein the heat exchange pool 10 plays a role in heat exchange, and the separation pool 40 plays a role in separation. In this way, the cooling medium of the server on the secondary side waiting for the heat dissipation device to dissipate heat can be cooling oil, and the cooling system on the primary side can use low-temperature cooling water. The return oil pipe 20 passes the cooling oil heated in the heat dissipation device into the heat exchange pool 10, and the liquid inlet pipe 30 also passes the cooling water into the heat exchange pool 10. The oil and water are in direct contact in the heat exchange pool 10 for heat exchange. At the same time, the separation pool 40 is provided so that the oil-water mixture formed by heat exchange in the heat exchange pool 10 can enter the separation pool 40 through the connecting pipe 50, and the oil and water are separated in the separation pool 40. Since the density of the cooling oil is smaller than that of the cooling water, the cooling oil will gather upwards and form an oil layer on the water surface. The cooling oil on the top can be returned to the server through the oil supply pipe 60 for recycling, and the cooling water can be returned to the cooling system through the liquid outlet pipe 70 for recycling. Through the above-mentioned setting, on the one hand, full use is made of the heat conduction and forced heat convection formed between oil and water, especially the heat transfer resistance of heat convection is small and the heat transfer area is larger, so that the heat transfer efficiency of heat convection between oil and water is usually much higher than that of heat conduction, thereby greatly improving the heat exchange and cooling capacity of the system, which is several times or even dozens of times higher than the conventional water-water inter-wall heat exchange solution, expanding the operating range of the computer room refrigeration system and effectively saving power consumption. On the other hand, the separation pool 40 realizes the recycling of the system, so that the cooling distribution system can work continuously. At the same time, due to the significant increase in the cooling capacity of a single cooling distribution system, the number of cooling distribution systems configured is naturally reduced, the available area of ​​the cabinet is increased, the operating range of the computer room refrigeration system is expanded and the cooling power consumption is effectively saved, and the PUE (i.e., Power Usage Effectiveness, which is an indicator for evaluating the energy efficiency of a data center, defined as the ratio of all energy consumed by the data center to the energy consumed by the load) of the entire data center is reduced.

[0026] like Figure 1 As shown, in the present embodiment, both the return oil pipe 20 and the liquid inlet pipe 30 have an outlet end located in the heat exchange tank 10, wherein the outlet end of the return oil pipe 20 is located below the outlet end of the liquid inlet pipe 30, so that the cooling oil introduced into the heat exchange tank 10 through the return oil pipe 20 is initially located at the bottom, while the cooling water introduced into the heat exchange tank 10 through the liquid inlet pipe 30 is initially located at the top. Since the density of the cooling oil is smaller than that of the cooling water, the cooling oil will flow upward and the cooling water will flow downward, thereby spontaneously forming an upward and downward flow between the cooling water and the cooling oil, thereby improving the effect of thermal convection and the heat exchange effect.

[0027] Preferably, in this embodiment, the outlet end of the oil return pipe 20 is set at the bottom area of ​​the heat exchange pool 10, and the outlet end of the liquid inlet pipe 30 is set at the top area of ​​the heat exchange pool 10, so that the entire range in the height direction of the heat exchange pool 10 can be covered, so that most areas of the heat exchange pool 10 have heat exchange between cooling oil and cooling water, thereby further improving the effect of thermal convection and improving the heat exchange effect.

[0028] In this embodiment, the cooling distribution system further includes a rectifying member 80, which is arranged in the separation tank 40, and the rectifying member 80 is arranged obliquely. The rectifying member 80 of this embodiment adopts an inclined rectifying plate, and the outlet end of the connecting pipe 50 is located below the rectifying member 80. In this way, the oil-water mixture flows out from the outlet of the connecting pipe 50 at the bottom of the separation tank 40, and the oil phase droplets gradually float up due to their low density. During the floating process, due to the surface tension of oil and water, the individual smaller oil phase droplets gradually condense into large oil droplets, and under the guidance and convergence of the rectifying plate, the distribution density of the oil phase droplets in the water phase gradually increases with the rising process, further promoting the oil phase from the dispersed phase in the droplet state to the continuous phase. Finally, the large oil phase droplets float up to the interface position of the oil phase and the water phase, stay there and merge into the top oil liquid continuous phase, and the water phase in the mixed liquid flowing out of the connecting pipe 50 naturally directly combines with the water phase originally existing in the separation tank 40, so as to complete the separation of the oil phase and the water phase.

[0029] Since the oil layer is distributed on the water surface, the inlet end of the oil supply pipe 60 is arranged above the rectifying component 80 in this embodiment, so that the cooling oil in the oil-water mixture introduced by the connecting pipe 50 is collected on the water surface through the rectifying component 80 and can be discharged through the upper oil supply pipe 60 and enter the server for recycling.

[0030] In this embodiment, the inlet end of the liquid outlet pipe 70 is arranged below the rectifying plate, and more specifically, below the outlet end of the connecting pipe 50. Thus, the separation tank 40 is provided with the oil supply pipe 60, the rectifying plate, the outlet end of the connecting pipe 50, and the liquid outlet pipe 70 in order from top to bottom, so that the cooling oil above can be discharged for use through the oil supply pipe 60, and the cooling water below can be discharged for circulation through the liquid outlet pipe 70. The rectifying plate can be fixed to the separation tank 40 by welding or riveting.

[0031] In this embodiment, there are multiple rectifying parts 80, and the rectifying parts 80 can be arranged in the separation tank 40 in at least one of the horizontal and vertical directions. The rectifying plates of this embodiment are arranged partially in the horizontal direction and partially in the vertical direction. Specifically, the rectifying parts 80 of this embodiment are arranged at the inner wall of the separation tank 40, and rectifying parts 80 are arranged at the horizontally opposite side walls of the separation tank 40. The relative rectifying parts 80 are roughly located at the same height position, the inclination directions of the relative rectifying parts 80 are opposite, and the inclination angles of the relative rectifying parts 80 are the same. In the direction gradually approaching the center of the separation tank 40, the rectifying parts 80 are inclined upward, so that the oil converges to the center of the separation tank 40 under the action of the rectifying parts 80. In addition to the above-mentioned transverse arrangement, the rectifying members 80 are also arranged vertically up and down, and multiple rows of rectifying members 80 are arranged in the longitudinal direction. The upper and lower rectifying members 80 are arranged at intervals, and the upper and lower rectifying members 80 can be aligned up and down, or staggered at a certain position, thereby improving the coverage of the rectifying members 80 and ensuring that the rectifying members 80 can fully play the role of separating the oil phase and the water phase and converging the oil phase. Of course, the specific structural form and arrangement of the rectifying members 80 are not limited to the above-mentioned setting method of this embodiment, and can be adjusted as needed.

[0032] In this embodiment, the cooling distribution system also includes a circulation pipe 90, one end of which is located in the top area of ​​the separation tank 40 and near the interface between the oil phase and the water phase, and the other end of the circulation pipe 90 is connected to the connecting pipe 50. The function of the circulation pipe 90 is to transport part of the oil-water mixture in the upper layer of the separation tank 40 back to the bottom area of ​​the separation tank 40, that is, the oil-water mixture in the upper layer of the separation tank 40 flows to the bottom area of ​​the separation tank 40 through the circulation pipe 90 and the connecting pipe 50, so that the circulation pipe 90 serves as a bypass pipe of the separation tank 40 and plays a role in multiple circulation separations during the oil-water separation process. For some extreme scenarios where the oil phase and the water phase are not completely separated due to large flow fluctuations, some oil phase droplets will still exist as dispersed phases at the interface of the oil phase and the water phase. At this time, the oil phase and the water phase interface liquid is pumped into the connecting pipe 50 through the circulation pipe 90, and enters the bottom of the separation tank 40 again to start two or even more rounds of separation.

[0033] In this embodiment, nozzles are also provided at the outlet ends of the oil return pipe 20 and the liquid inlet pipe 30. The nozzles can be configured in different ways and in different shapes as needed to match the spraying requirements of cooling water and cooling oil, so that the cooling water and cooling oil can fully exchange heat. The ends of the oil return pipe 20, the liquid inlet pipe 30, the oil supply pipe 60, and the liquid outlet pipe 70 connected to the outside can be provided with structures such as flanges to achieve docking with the server pipelines and cooling system pipelines.

[0034] like Figure 2As shown, in this embodiment, the liquid inlet side of the cooling distribution system also includes a filter 100, an inlet first pressure sensor 110, an inlet second pressure sensor 120, an inlet temperature sensor 130, an inlet flow sensor 140 and a regulating valve 150, and the filter 100 is arranged on the return oil pipe 20 and / or the liquid inlet pipe 30; the inlet first pressure sensor 110 is arranged on the return oil pipe 20 and / or the liquid inlet pipe 30, and the inlet first pressure sensor 110 is located on the upstream side of the filter 100; the inlet second pressure sensor 120 is arranged on the return oil pipe 20 and / or the liquid inlet pipe 30, and the inlet second pressure sensor 120 is located on the downstream side of the filter 100; the inlet temperature sensor 130 is arranged on the return oil pipe 20 and / or the liquid inlet pipe 30; the inlet flow sensor 140 is arranged on the return oil pipe 20 and / or the liquid inlet pipe 30; and the regulating valve 150 is arranged on the liquid inlet pipe 30.

[0035] Specifically, the above-mentioned components on the return oil pipe 20 and the liquid inlet pipe 30 of this embodiment are basically arranged in the same way. Taking the return oil pipe 20 as an example, along the flow direction of the cooling oil, the return oil pipe 20 is sequentially provided with an inlet temperature sensor 130, an inlet first pressure sensor 110, a filter 100, an inlet second pressure sensor 120, and an inlet flow sensor 140, and the cooling oil is sequentially transported to the heat exchange tank 10 after passing through the above-mentioned components. The difference between the liquid inlet pipe 30 and the return oil pipe 20 is that the liquid inlet pipe 30 is further provided with a regulating valve 150 on the downstream side of the inlet flow sensor 140, and the regulating valve 150 can be used to adjust the flow, rate, pressure and other parameters of the cooling water, so as to ensure that the supply of cooling water matches the cooling oil and ensure the heat exchange effect. Among the above-mentioned components, the inlet temperature sensor 130 and the inlet flow sensor 140 are used to test the flow condition of the liquid, the filter 100 is used to filter the liquid, and the inlet first pressure sensor 110 and the inlet second pressure sensor 120 cooperate with the filter 100 to judge whether the filter 100 is blocked by the pressure difference between the inlet first pressure sensor 110 and the inlet second pressure sensor 120.

[0036] In this embodiment, the liquid outlet side of the cooling distribution system further includes an outlet pressure sensor 160 and an outlet temperature sensor 170. The oil supply pipe 60 and / or the liquid outlet pipe 70 are provided with the outlet pressure sensor 160; the oil supply pipe 60 and / or the liquid outlet pipe 70 are provided with the outlet temperature sensor 170. The above-mentioned components on the oil supply pipe 60 and the liquid outlet pipe 70 of this embodiment are arranged exactly the same. Taking the oil supply pipe 60 as an example, the outlet pressure sensor 160 and the outlet temperature sensor 170 are sequentially arranged along the direction of the cooling oil flow.

[0037] The cooling distribution system of this embodiment also includes a pump body 190. The pump body 190 is disposed on the oil return pipe 20, the connecting pipe 50, the oil supply pipe 60, and the liquid outlet pipe 70. The specific location of the pump body 190 can be adjusted as needed and is not limited to the above-mentioned pipelines. The pump body 190 provides power for the flow of liquid, thereby ensuring the smooth flow of liquid in the system. It should be noted that the pump body 190 is not disposed on the liquid inlet pipe 30 in this embodiment. This is because the power of the cooling water in the liquid inlet pipe 30 can be provided by the cooling system at the front end, so it is not disposed on the liquid inlet pipe 30. Of course, the pump body 190 can also be added to the liquid inlet pipe 30. At the same time, in this embodiment, a pump body 190 is also provided on the circulation pipe 90. The pump body 190 on the circulation pipe 90 provides power for the circulation and separation of the oil-water mixture. Since the circulation pipe 90 is connected to the connecting pipe 50, the connection position between the circulation pipe 90 and the connecting pipe 50 in this embodiment is located on the downstream side of the pump body 190 on the connecting pipe 50. In this way, it can be ensured that the oil-water mixture from the circulation pipe 90 entering the connecting pipe 50 can only flow into the separation tank 40 and will not flow back into the heat exchange tank 10, thereby ensuring that the circulation separation can be carried out efficiently.

[0038] In this embodiment, the cooling distribution system further includes a liquid level sensor 180, and the liquid level sensor 180 is disposed in the heat exchange pool 10 and / or the separation pool 40. The liquid level sensor 180 is disposed at different height positions in the heat exchange pool 10 and / or the separation pool 40 to detect the upper and lower limits of the liquid level. In this embodiment, two liquid level sensors 180 are respectively disposed in the heat exchange pool 10 and the separation pool 40, and the two liquid level sensors 180 in the heat exchange pool 10 and the separation pool 40 are respectively located at the bottom and the top, so that the lowest and highest liquid levels in the pool can be detected to avoid the situation of too much or too little liquid, and ensure continuous normal operation. In particular, for the liquid level sensor 180 located lower in the separation tank 40, in addition to having the function of the lowest liquid level component, it also has the function of detecting the oil-water separation state by detecting bubbles. Specifically, the liquid level sensor 180 is electrically connected to the pump body 190 on the circulation pipe 90. When the oil phase and the water phase are not completely separated and some oil phase droplets still exist in the dispersed phase at the interface between the oil phase and the water phase, the liquid level sensor 180 will detect the "bubble"-shaped oil droplets. The liquid level sensor 180 transmits a signal to the central control platform, which then controls the pump body 190 on the circulation pipe 90 to start working, and pumps the oil phase and water phase interface liquid through the circulation pipe 90 into the connecting pipe 50 for circulation separation.

[0039] In addition to the above-mentioned components, components such as one-way valves may also be provided on each pipeline, as long as they help each pipeline to operate in the intended manner.

[0040] The cooling distribution system of this embodiment includes a box body, in which a heat exchange pool 10, a separation pool 40 and a control area 200 are separated from each other. The heat exchange pool 10 and the separation pool 40 are arranged in a horizontally separated manner. The height of the separation pool 40 is higher than that of the heat exchange pool 10. The control area 200 is located above the heat exchange pool 10. At least one of an electrical box 201, an electric control box 202 and a frequency conversion box 203 is arranged in the control area 200, and components such as a display device may also be arranged. The box body also has a transition area 210, which is located between the heat exchange pool 10 and the control area 200, so as to form the control area 200, the transition area 210 and the heat exchange pool 10 from top to bottom. The transition zone 210 is used for the pipeline to extend into, the oil return pipe 20 and the liquid inlet pipe 30 extend from the side wall of the transition zone 210 into the transition zone 210, and extend from the bottom surface of the transition zone 210 into the heat exchange tank 10 below, and the filter 100, pump body 190 and other components can be arranged in the transition zone 210. In the above structural form, the electrical box 201, the electric control box 202, the frequency conversion box 203 and the like are arranged at the upper position because the main input cable usually adopts the upper incoming line, and each pump body 190, the filter 100 and the like are arranged at the middle position considering the operation habits of the later maintenance personnel, and the heat exchange tank 10 is arranged at the bottom position considering the weight factor, and the separation tank 40 on one side of the heat exchange tank 10 is convenient for the connecting pipe 50 and the circulation pipe 90 to cross the heat exchange tank 10 and the separation tank 40.

[0041] The present embodiment also provides a data center, including a server, a cooling system and the above-mentioned cooling distribution system. The return oil pipe 20 and the oil supply pipe 60 of the cooling distribution system are connected to the liquid cooling pipeline of the server, so as to achieve the effect of supplying medium and low temperature cooling oil for the server to dissipate heat. The liquid inlet pipe 30 and the liquid outlet pipe 70 of the cooling distribution system are connected to the cooling system, so as to achieve the effect of supplying low-temperature cooling water to the cooling distribution system, thereby achieving the effect of heat exchange cooling of the high-temperature cooling oil.

[0042] The operation process of the cooling distribution system of this embodiment is as follows:

[0043] On the secondary side, the liquid in the return oil pipe 20 is the high-temperature oil flowing out of the server. The system determines the liquid working condition of the secondary side return liquid through the inlet temperature sensor 130 and the inlet flow sensor 140 on the collection, and controls it through the pump body 190 thereon. Before the high-temperature oil enters the pump body 190, it will first be filtered by the filter 100. The filter 100 determines whether the filter 100 is blocked through the pressure difference between the inlet first pressure sensor 110 and the inlet second pressure sensor 120 installed on the upstream and downstream sides.

[0044] On the primary side, the liquid in the liquid inlet pipe 30 is low-temperature chilled water provided from a cooling system such as an outdoor cooling tower or a chiller. The system determines the liquid working condition of the primary side liquid inlet by collecting the inlet temperature sensor 130 and the inlet flow sensor 140 on the liquid inlet pipe 30, and controls the flow through the regulating valve 150 to match the cooling demand of the secondary side oil. Before the low-temperature water enters the regulating valve 150, it will first be filtered by the filter 100. The filter 100 determines whether the filter 100 is blocked by the pressure difference between the inlet first pressure sensor 110 and the inlet second pressure sensor 120 installed on the upstream and downstream sides.

[0045] When the high-temperature oil on the secondary side and the chilled water on the primary side enter the heat exchange tank 10 through their respective pipelines, the nozzle of the return oil pipe 20 is located at the bottom of the heat exchange tank 10 and sprays upward, and the nozzle of the liquid inlet pipe 30 is located at the top of the heat exchange tank 10 and sprays downward. The two liquids are sprayed in opposite directions to enhance the adequacy of heat exchange through heat conduction and forced convection in the heat exchange tank 10. The heat exchange tank 10 is initially filled with chilled water. An automatic exhaust valve is installed on the top of the heat exchange tank 10. At least two liquid level sensors 180 are installed in the tank to detect the lower limit and upper limit of the safe liquid level of the liquid in the tank. When the liquid level in the heat exchange tank 10 is between the lower limit and the upper limit of the safe liquid level, it is considered normal. Otherwise, an external alarm is issued through the central control platform to prompt the user to check.

[0046] The mixed liquid in the heat exchange pool 10 is composed of an oil phase and a water phase, wherein the oil is used as a dispersed phase and the water is used as a continuous phase. The high-temperature oil sprayed into the heat exchange pool 10 accounts for a minority component. The process of heat exchange between the two liquids is actually a two-phase heat transfer of the dispersed phase of the oil in the continuous phase of the chilled water. The oil and water transfer heat between the two phases in a limited space, and sufficient heat transfer is carried out under the action of complex laminar flow and turbulence, so as to achieve a two-phase thermal equilibrium with extremely fast efficiency.

[0047] The oil-water mixture enters the separation tank 40 after passing through the one-way valve and the pump body 190 on the connecting pipe 50. The pump body 190 controls the flow rate through it to be equal to the sum of the values ​​of the two inlet flow sensors 140 on the return oil pipe 20 and the liquid inlet pipe 30, thereby ensuring the stability of the liquid level in the heat exchange tank 10. The volume ratio of the oil phase to the water phase in the separation tank 40 is initially 1:4, ensuring that the initial state in the separation tank 40 has circulation conditions. The oil-water mixture flows out from the outlet of the connecting pipe 50 at the bottom of the separation tank 40, and the oil phase droplets gradually float up due to their low density. During the floating process, due to the surface tension of oil and water, the individual smaller oil phase droplets gradually condense into large oil droplets, and under the guidance and convergence of the rectifier plate, the distribution density of the oil phase droplets in the water phase gradually increases with the rising process, further promoting the transformation of the oil phase from a dispersed phase in a droplet state to a continuous phase. Finally, the large oil phase droplets float to the interface between the oil phase and the water phase, stay there and merge into the top oil continuous phase, and the water phase in the oil-water mixture flowing out of the connecting pipe 50 naturally and directly combines with the water phase originally existing in the separation tank 40, thereby completing the separation of the oil phase and the water phase.

[0048] An automatic exhaust valve is installed on the top of the separation tank 40, and at least two liquid level sensors 180 are installed on the side wall of the separation tank 40. The specific configuration can use a photoelectric liquid level sensor or an electromagnetic liquid level sensor, which can realize liquid level detection and bubble detection. The liquid level sensor 180 on the top is used to detect whether the liquid level of the separation tank 40 is lower than the upper limit of the safe liquid level, and the liquid level sensor 180 on the bottom is installed at the interface of the oil phase and the water phase, and is used to detect the "bubble" state at the interface, that is, the degree of oil-water separation. In some extreme scenarios, the oil phase and the water phase are not completely separated due to large flow fluctuations. At the interface of the oil phase and the water phase, some oil phase droplets still exist in the dispersed phase. The bottom liquid level sensor 180 detects the "bubble"-shaped oil droplets, transmits a signal to the central control platform, and then controls the pump body 190 on the circulation pipe 90 to start running, and the oil phase and water phase interface liquid is pumped into the connecting pipe 50 through the circulation pipe 90, and then enters the bottom of the separation tank 40 again, starting a second or even multiple rounds of separation. The circulation pipe 90 serves as a bypass pipe of the separation tank 40 and performs multiple circulation separation functions during the oil-water separation process.

[0049] The inlet of the oil supply pipe 60 is installed in the oil continuous phase area at the top of the separation tank 40. This part of the oil is a medium-temperature oil that has been cooled and separated thoroughly. The outlet temperature sensor 170 and the outlet pressure sensor 160 are installed on the oil supply pipe 60. The oil is discharged to the outside of the cabinet through the pump body 190 on it and enters the liquid cooling pipeline of the secondary side server to participate in the refrigeration cycle. The control factors of the liquid supply flow of the pump body 190 include the difference between the inlet temperature sensor 130 on the return oil pipe 20 and the system set temperature, the inlet flow sensor 140 on the return oil pipe 20, the oil specific heat capacity, the outlet temperature sensor 170 on the oil supply pipe 60, etc., and the secondary side liquid supply flow rate is controlled in the form of negative feedback signal processing.

[0050] The inlet of the liquid outlet pipe 70 is installed in the water phase area at the bottom of the separation tank 40. This part of water is cooling water after heat exchange and complete separation. The outlet pipe 70 is installed with an outlet temperature sensor 170 and an outlet pressure sensor 160. It is discharged to the outside of the cabinet through the pump body 190 on it and enters the pipe network of the cooling system on the primary side to complete the heat exchange cycle. The valve opening control factors of the regulating valve 150 on the inlet pipe 30 include the inlet flow sensor 140 on the return oil pipe 20, the specific heat capacity of the oil, etc., to adapt to the heat exchange requirements of the oil on the secondary side.

[0051] The flow rate of the pump body 190 on the liquid outlet pipe 70 is kept the same as the flow rate through the regulating valve 150 on the liquid inlet pipe 30, that is, the value of the inlet flow sensor 140 on the liquid inlet pipe 30 is collected. The flow rate of the pump body 190 on the oil supply pipe 60 is kept the same as the flow rate of the pump body 190 on the oil return pipe 20, that is, the value of the inlet flow sensor 140 on the oil return pipe 20 is collected, so that the primary side liquid inlet and outlet flow rates are balanced, and the secondary side oil supply and return flow rates are balanced, so as to control the liquid level height of the heat exchange tank 10 and the separation tank 40 to be stable.

[0052] It should be noted that, the multiple in the above embodiments refers to at least two.

[0053] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0054] 1. Solve the problem of low refrigeration capacity of the cooling distribution system in the related technology;

[0055] 2. It makes full use of the heat conduction and forced heat convection formed between oil and water. In particular, the heat transfer resistance of heat convection is small and the heat transfer area is larger, so that the heat transfer efficiency of heat convection between oil and water is usually much higher than that of heat conduction, thereby greatly improving the heat exchange and cooling capacity of the system, which is several times or even dozens of times higher than the conventional water-water interlayer heat exchange solution, expanding the operating range of the computer room refrigeration system and effectively saving power consumption;

[0056] 3. The system is recycled through the separation tank, so that the cooling distribution system can work continuously;

[0057] 4. As the cooling capacity of a single cooling distribution system is greatly increased, the number of cooling distribution systems is naturally reduced, the available area of ​​the cabinet is increased, the operating range of the computer room cooling system is expanded, and the cooling power consumption is effectively saved.

[0058] Reduce the PUE of the entire data center.

[0059] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0061] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cooling distribution system, characterized in that: include: Heat exchange tank (10); An oil return pipe (20) connected to the device to be cooled, the oil return pipe (20) extending into the heat exchange tank (10) and connected to the heat exchange tank (10); a liquid inlet pipe (30), the liquid inlet pipe (30) extending into the heat exchange pool (10) and communicating with the heat exchange pool (10), the oil return pipe (20) and the liquid inlet pipe (30) respectively passing cooling oil and cooling water into the heat exchange pool (10), and allowing the cooling oil and the cooling water to mix and exchange heat; a separation tank (40), the separation tank (40) being connected to the heat exchange tank (10) through a connecting pipe (50), the water-oil mixture after heat exchange in the heat exchange tank (10) entering the separation tank (40) through the connecting pipe (50) for oil-water separation; an oil supply pipe (60) connected to the heat dissipation device, the oil supply pipe (60) being connected to the separation tank (40), the cooling oil separated in the separation tank (40) entering the oil supply pipe (60); A liquid outlet pipe (70), the liquid outlet pipe (70) is in communication with the separation tank (40), and the cooling water separated in the separation tank (40) enters the liquid outlet pipe (70).

2. The cooling distribution system according to claim 1, characterized in that: The oil return pipe (20) and the liquid inlet pipe (30) both have an outlet end located in the heat exchange tank (10), and the outlet end of the oil return pipe (20) is located below the outlet end of the liquid inlet pipe (30).

3. The cooling distribution system according to claim 2, characterized in that: The outlet end of the oil return pipe (20) is located in the bottom area of ​​the heat exchange tank (10), and the outlet end of the liquid inlet pipe (30) is located in the top area of ​​the heat exchange tank (10).

4. The cooling distribution system according to claim 1, characterized in that: The cooling distribution system further comprises a rectifying member (80), wherein the rectifying member (80) is arranged in the separation tank (40) and the rectifying member (80) is arranged at an angle, the outlet end of the connecting pipe (50) is located below the rectifying member (80), the inlet end of the oil supply pipe (60) is located above the rectifying member (80), and the cooling oil in the oil-water mixture introduced into the connecting pipe (50) is collected via the rectifying member (80).

5. The cooling distribution system according to claim 4, characterized in that: There are multiple rectifying parts (80), wherein: The rectifying members (80) are arranged at opposite side walls of the separation tank (40), and the inclination directions of the opposite rectifying members (80) are opposite; and / or at least some of the rectifying members (80) are arranged at intervals in the longitudinal direction.

6. The cooling distribution system according to claim 1, characterized in that: The cooling distribution system also includes a circulation pipe (90), one end of which is located in the top area of ​​the separation tank (40), and the other end of the circulation pipe (90) is connected to the connecting pipe (50), and the oil-water mixture in the upper layer of the separation tank (40) flows to the bottom area of ​​the separation tank (40) via the circulation pipe (90) and the connecting pipe (50).

7. The cooling distribution system according to any one of claims 1 to 6, characterized in that: The cooling distribution system also includes: A filter (100), wherein the oil return pipe (20) and / or the liquid inlet pipe (30) is provided with the filter (100); an inlet first pressure sensor (110), the oil return pipe (20) and / or the liquid inlet pipe (30) being provided with the inlet first pressure sensor (110), and the inlet first pressure sensor (110) being located at the upstream side of the filter (100); an inlet second pressure sensor (120), the oil return pipe (20) and / or the liquid inlet pipe (30) being provided with the inlet second pressure sensor (120), and the inlet second pressure sensor (120) being located at the downstream side of the filter (100); an inlet temperature sensor (130), the inlet temperature sensor (130) being arranged on the oil return pipe (20) and / or the liquid inlet pipe (30); an inlet flow sensor (140), the inlet flow sensor (140) being arranged on the oil return pipe (20) and / or the liquid inlet pipe (30); a regulating valve (150), wherein the regulating valve (150) is arranged on the liquid inlet pipe (30); an outlet pressure sensor (160), the outlet pressure sensor (160) being arranged on the oil supply pipe (60) and / or the liquid outlet pipe (70); An outlet temperature sensor (170) is provided on the oil supply pipe (60) and / or the liquid outlet pipe (70).

8. The cooling distribution system according to any one of claims 1 to 6, characterized in that: The cooling distribution system also includes: a liquid level sensor (180), the liquid level sensor (180) being arranged in the heat exchange pool (10) and / or the separation pool (40), and the liquid level sensor (180) being arranged at different height positions in the heat exchange pool (10) and / or the separation pool (40) to detect the upper limit and lower limit of the liquid level or to detect bubbles; and / or The pump body (190) is disposed on the oil return pipe (20), the connecting pipe (50), the oil supply pipe (60), and the liquid outlet pipe (70), and the pump body (190) provides power for the flow of liquid.

9. The cooling distribution system according to claim 1, characterized in that: The cooling distribution system comprises a box body, wherein the heat exchange pool (10), the separation pool (40) and the control area (200) are separated from each other, the heat exchange pool (10) and the separation pool (40) are arranged in a transversely separated manner, the height of the separation pool (40) is higher than the height of the heat exchange pool (10), the control area (200) is located above the heat exchange pool (10), and at least one of an electrical box (201), an electric control box (202) and a frequency conversion box (203) is arranged in the control area (200); The housing further comprises a transition zone (210), the transition zone (210) being located between the heat exchange pool (10) and the control zone (200); the oil return pipe (20) and the liquid inlet pipe (30) extending from the side wall of the transition zone (210) into the transition zone (210), and extending from the bottom surface of the transition zone (210) into the heat exchange pool (10) below; the outlet end of the oil return pipe (20) extending into the bottom area of ​​the heat exchange pool (10), and the outlet end of the liquid inlet pipe (30) extending into the top area of ​​the heat exchange pool (10); The cooling distribution system also includes a rectifying member (80), which is arranged in the middle area of ​​the separation tank (40) and is inclined. The outlet end of the connecting pipe (50) is located below the rectifying member (80), the inlet end of the oil supply pipe (60) is located above the rectifying member (80), and the inlet end of the liquid outlet pipe (70) is located below the outlet end of the connecting pipe (50).

10. A data center, characterized in that: It comprises a server, a cooling system and a cooling distribution system according to any one of claims 1 to 9, wherein the return oil pipe (20) and the supply oil pipe (60) of the cooling distribution system are connected to the liquid cooling pipeline of the server, and the liquid inlet pipe (30) and the liquid outlet pipe (70) of the cooling distribution system are connected to the cooling system.

Images