Data center phase change liquid cooling framework and machine room

Abstract

The embodiment of the invention discloses a data center phase change liquid cooling framework and a machine room. The framework comprises a machine room, a machine cabinet and a condensation unit fixed in the machine room, the machine room comprises a sealed equipment cavity, a cabinet and a condensation unit are located in the equipment cavity, and the condensation unit is located above the cabinet; the node case on the cabinet side comprises an exhaust opening and a liquid inlet, an inner cavity of the case can contain a phase change working medium, a vapor state working medium in the node case can be discharged into the equipment cavity through the exhaust opening, and a liquid return pipe communicated with the liquid inlet of the case is provided with a liquid return connector; the condensing unit comprises a condensing pipe and a liquid collecting tray, the liquid collecting tray is located below the condensing pipe, and a liquid outlet connector of the liquid collecting tray is in butt joint with a liquid return connector of the liquid return pipe to form a liquid return channel. According to the arrangement, the condensation unit and the cabinet are arranged in the sealing equipment cavity of the machine room to form a phase change liquid cooling framework of machine room level sealing, and compared with traditional cabinet level sealing or node level sealing, the overall sealing implementation cost can be effectively reduced.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of data centers, and in particular to a data center phase change liquid cooling architecture and a computer room. BACKGROUND

[0002] With the development of data centers towards high power, high integration, and super large scale, high-performance chips and integrated circuit elements are increasingly widely used, and the heat flux density is increasing. The traditional air cooling system has been unable to meet the heat dissipation needs of high-power elements, and liquid cooling technology is widely used in high-power density heat dissipation scenarios based on low energy consumption and good heat dissipation capacity.

[0003] In order to ensure the stability and reliability of data center servers, the research and design of efficient cooling systems have become a key link in the design of data center systems. According to whether the liquid cooling medium is in direct contact with the power device, liquid cooling can be divided into indirect contact liquid cooling and direct immersion liquid cooling; according to the state of the liquid cooling medium when taking away heat, it can be divided into single-phase liquid cooling and phase change liquid cooling.

[0004] Taking a data center server as an example, in a typical phase change immersion liquid cooling scheme, the heat generated by the high-power device in the server node is transferred to the liquid working medium, the liquid working medium is vaporized, and then liquefied at the condenser or condenser of the cooling liquid distribution device (CDU). The CDU is usually integrated with the server, and based on the heat management and distribution of the CDU, the liquid cooling medium after releasing heat returns to the server node side and enters the next liquid cooling cycle. However, the volatility of the phase change working medium is relatively large, and reliable node-level sealing or cabinet-level sealing needs to be provided at the server side, and the sealing implementation cost is relatively high. SUMMARY

[0005] Embodiments of the present application provide a data center phase change liquid cooling architecture and a computer room, which can reasonably control the overall sealing cost through optimization of the phase change liquid cooling architecture.

[0006] The first aspect of the embodiment of the application provides a data center phase change liquid cooling architecture, which comprises a machine room, a cabinet, and a condensing unit, a water supply pipe and a return water pipe fixed to the machine room; the machine room comprises a sealed equipment cavity, the cabinet and the condensing unit are located in the equipment cavity, and the condensing unit is located above the cabinet; the cabinet comprises a cabinet body, a node and a liquid return pipe, the node and the liquid return pipe are arranged on the cabinet body, the node comprises a case and a power device to be cooled in the case, the case comprises an exhaust opening and a liquid inlet, and an inner cavity of the case can contain a phase change working medium, so that the power device to be cooled of the node is immersed in the liquid working medium, and the gaseous working medium in the node case can be discharged into the equipment cavity through the exhaust opening; the liquid return pipe is in communication with the liquid inlet of the case, and the liquid return pipe comprises a liquid return interface. The condensing unit comprises a condensing pipe and a liquid collecting disc, the water inlet of the condensing pipe is in communication with the water supply pipe, the water outlet of the condensing pipe is in communication with the return water pipe, the cooling water can flow into the condensing pipe through the water supply pipe, after heat exchange and temperature rise, flow into the heat exchanger through the return water pipe, and after heat exchange and temperature drop, the cooling water can flow to the condensing unit through the water supply pipe. The liquid collecting disc is located below the condensing pipe, and the projections of the two on the floor surface of the machine room at least partially overlap, the liquid collecting disc is provided with a liquid outlet interface, and the liquid outlet interface of the liquid collecting disc is in butt joint with the liquid return interface of the liquid return pipe to form a liquid return channel.

[0007] In this way, after the gaseous working medium in the node is discharged into the equipment cavity of the machine room, the gaseous working medium rises and contacts the surface of the condensing pipe to exchange heat, the liquid working medium that is liquefied by the cold drops into the liquid containing part of the liquid collecting disc, the liquid outlet interface of the liquid collecting disc is used to butt joint with the liquid return interface of the liquid return pipe to form a liquid return channel, thereby, a phase change working medium working cycle is constructed. The condensing unit and the cabinet of the embodiment of the application are arranged in the sealed equipment cavity of the machine room, forming a machine room level sealed phase change liquid cooling architecture, which can effectively reduce the overall sealing implementation cost compared with the traditional cabinet level sealing or node level sealing.

[0008] In addition, the condensing unit, the water supply pipe and the return water pipe are arranged on the machine room side, which can realize independent evolution of the CDU and the cabinet. On the one hand, the size and weight of the cabinet can be reasonably controlled, facilitating the transfer transportation operation of the cabinet and the deployment operation in the equipment cavity of the machine room, effectively reducing the packaging cost, storage cost and transportation cost of the cabinet. At the same time, based on the structural characteristics that the condensing unit is arranged on the machine room side, the condensing unit can be fully arranged in the machine room space to obtain the heat exchange capacity meeting the heat dissipation demand of the cabinet, which can effectively avoid the problem that the overall heat exchange capacity of the condensing unit limits the performance evolution of the cabinet.

[0009] In addition, for the phase change working medium working cycle between the condensing unit and the cabinet, based on the relative position relationship that the condensing unit is located above the cabinet, the liquid working medium in the condensing unit can flow downward to the cabinet side through the liquid return channel, realizing gravity liquid return, which can further reduce the liquid return driving power consumption. Overall, in order to ensure that each cabinet equipment in the data center machine room keeps continuous high load operation, effectively improves the efficiency, and provides good technical support.

[0010] In practical applications, the condensing unit can be located directly above the cabinet or on the side of the cabinet, in other words, the projection of the condensing unit and the cabinet on the floor of the computer room can completely overlap, partially overlap or completely stagger.

[0011] Exemplarily, the projection area of the condensing unit on the floor of the computer room can be greater than the projection area of the cabinet on the floor of the computer room. For example, but not limited to, the condensing unit is arranged above the space between the cabinets. In this way, the overall heat exchange capacity can be improved according to the heat dissipation requirements of the equipment in the computer room, and the top space of the equipment cavity in the computer room is fully utilized.

[0012] Other examples, the cabinets in the computer room include but are not limited to servers, storage devices, switches, routers, firewalls and other facilities or equipment.

[0013] Based on the first aspect, the embodiments of the present application also provide a first implementation of the first aspect: the projection of the condensing pipe on the floor of the computer room coincides with the projection of the liquid collecting pan on the floor of the computer room; or the projection of the condensing pipe on the floor of the computer room is located within the projection of the liquid collecting pan on the floor of the computer room. In this way, it can be ensured that the liquid state working medium condensed on the surface of the condensing pipe can reliably drop into the liquid collecting pan, and the working medium liquid amount in the liquid cooling working cycle can be ensured, and the processing cost of recycling and reusing the liquid state working medium can be reduced.

[0014] Based on the first aspect, or the first implementation of the first aspect, the embodiments of the present application also provide a second implementation of the first aspect: the condensing pipe of the condensing unit is inclinedly arranged, and the projection of the lower end of the condensing pipe on the floor of the computer room is located within the projection of the liquid collecting pan on the floor of the computer room. In this way, the top space of the computer room is fully utilized to realize the lengthened arrangement of the condensing pipe, increase the condensing area for contacting with the vapor state working medium, and improve the condensing heat exchange efficiency; at the same time, the working medium that is liquefied on the surface of the condensing pipe can be quickly guided into the liquid collecting pan located below the condensing pipe under the guiding action of the inclinedly arranged condensing pipe, and the liquid droplets flying due to high falling can be avoided, and the processing cost of recycling and reusing the liquid state working medium can be further reduced.

[0015] In practical applications, the setting position of the water inlet of the condensing pipe can be higher than the setting position of the water outlet, so that the cooling water can flow quickly in the condensing pipe and the condensing heat exchange efficiency can be improved.

[0016] In the third implementation of the first aspect, the condensing unit further comprises a water supply connector and a water return connector, the water inlet of the condensing pipe is in communication with the water supply connector, and the water supply connector is in communication with the water supply pipe; the water outlet of the condensing pipe is in communication with the water return connector, and the water return connector is in communication with the water return pipe; wherein a plurality of condensing pipes are arranged in parallel between the water supply connector and the water return connector, and the plurality of condensing pipes form a condensing pipe group. In this way, the cooling water flowing into each condensing pipe of the condensing pipe group has a consistent low temperature, which can provide a higher heat exchange capacity and effectively improve the heat dissipation capacity.

[0017] Exemplarily, the number of condensing pipe groups can be multiple, and accordingly, the number of water supply connectors and water return connectors is also multiple and corresponds to each condensing pipe group. In this way, a plurality of condensing pipe groups are arranged in parallel in the flow path of the water supply pipe and the water return pipe, which can realize reasonable distribution of cooling capacity. In addition, based on the feature that the gaseous working medium generated by each cabinet is directly discharged into the equipment cavity of the machine room, the multiple condensing pipe groups jointly participate in the condensation and liquefaction of the gaseous working medium, which can realize pooling of heat exchange resources and further improve the utilization rate of the condensation side heat dissipation capacity of the architecture. At the same time, based on the pooling of heat exchange resources, the pressure influence caused by different node loads can be completely avoided, which provides technical support for balancing the overall heat dissipation capacity and operation reliability of the architecture.

[0018] Exemplarily, the water supply connector and the water return connector of the condensing unit can be arranged in a direction perpendicular to the pipe arrangement plane of the condensing pipe to reasonably control the flow resistance and improve the heat exchange efficiency.

[0019] In the fourth implementation of the first aspect, the condensing unit further comprises a liquid outlet pipe, the liquid outlet pipe is fixed on the liquid collecting disc and in communication with the liquid containing portion of the liquid collecting disc; the liquid return pipe and the liquid outlet pipe are arranged in the vertical direction, the outer pipe end of the downwardly extending liquid outlet pipe forms a liquid outlet interface, and the outer pipe end of the upwardly extending liquid return pipe forms a liquid return interface; that is, the outer pipe end of the downwardly extending liquid outlet pipe forms a liquid outlet interface in communication with the liquid return pipe. In this way, the gravity liquid return flow resistance can be reasonably controlled, the structure is simple and reliable, and the butt joint assembly operation is facilitated.

[0020] In actual application, the water supply pipe and the water return pipe can be located in the equipment cavity, and the water supply pipe and the water return pipe are both annular pipes. The projection of the water supply pipe on the floor surface of the machine room is located on the inner side of the projection of the water return pipe on the floor surface of the machine room, or the projection of the water supply pipe on the floor surface of the machine room is located on the outer side of the projection of the water return pipe on the floor surface of the machine room.

[0021] In other practical applications, the water supply pipe and the water return pipe can also be fixed outside the machine room, and the two can be connected with the condensing unit fixed inside the machine room through the top wall of the machine room. In this way, when the water supply pipe and the water return pipe need to be maintained, the operator does not need to enter the inside of the machine room, and the influence of the operation and maintenance on the environment inside the machine room can be reduced.

[0022] Based on the first aspect, or the first implementation of the first aspect, or the second implementation of the first aspect, or the third implementation of the first aspect, or the fourth implementation of the first aspect, the embodiments of the present application further provide a fifth implementation of the first aspect: the number of the cabinets is multiple, the multiple cabinets are arranged in multiple rows, and the two adjacent rows of cabinets are arranged at intervals. In practical applications, the condensing pipes and the liquid collecting pans of the condensing units are arranged in rows and are arranged one by one corresponding to the cabinets arranged in rows. In this way, it is convenient to troubleshoot and analyze, and maintenance can be carried out independently on the basis of not affecting the normal operation of the non-fault part.

[0023] Based on the fifth implementation of the first aspect, the embodiments of the present application further provide a sixth implementation of the first aspect: the data center phase change liquid cooling architecture further comprises a baffle, the cabinet comprises multiple nodes, the exhaust opening of the case of each node is located on the same side of the cabinet body, the baffle, the liquid collecting pan and the cabinet body form a collection area, and the exhaust opening and the condensing pipe are located in the collection area. In this way, it can be ensured that the vapor state working medium is focused on the condensing pipe in the collection area flowing into the area, and fully contacts the condensing pipe to complete the condensation and liquefaction, and the heat exchange efficiency is effectively improved.

[0024] Based on the sixth implementation of the first aspect, the embodiments of the present application further provide a seventh implementation of the first aspect: the baffle forming the collection area comprises a first baffle and a second baffle, the first baffle is fixedly connected between the first side edge of the liquid collecting pan and the cabinet body, and the second baffle is fixedly connected between the second side edge of the liquid collecting pan and the top wall of the equipment cavity; the first side edge is the side edge of the liquid collecting pan close to the collection area, and the second side edge is the side edge of the liquid collecting pan away from the collection area.

[0025] Exemplarily, for the two rows of cabinets arranged adjacent to each other, the baffle can comprise two first baffles and two second baffles. In practical applications, the two first baffles and the two second baffles can be fixedly connected with the side walls of the equipment cavity, and the corresponding collection areas are formed for the two rows of cabinets and the corresponding condensing pipes.

[0026] Based on the seventh implementation manner of the first aspect, the embodiments of the present application further provide an eighth implementation manner of the first aspect: the baffle enclosing the collection area further comprises a third baffle, and the third baffle is fixedly connected with the same side plate end of the first baffle and the second baffle. Exemplarily, the third baffle can be two, and is fixed at the two side plate ends of the first baffle and the second baffle respectively, so as to form corresponding collection areas for the two rows of cabinets and corresponding condensing pipes. The third baffle has the characteristics of simple and reliable structure.

[0027] Based on the first aspect, or the first implementation manner of the first aspect, or the second implementation manner of the first aspect, or the third implementation manner of the first aspect, or the fourth implementation manner of the first aspect, or the fifth implementation manner of the first aspect, or the sixth implementation manner of the first aspect, or the seventh implementation manner of the first aspect, or the eighth implementation manner of the first aspect, or the ninth implementation manner of the first aspect, the embodiments of the present application further provide a tenth implementation manner of the first aspect: a flow valve is arranged between the liquid return pipe and the liquid inlet of the node. In this way, the opening degree of the flow valve can be adjusted according to the actual heat dissipation needs of each node, so as to realize the on-demand distribution of cold energy.

[0028] Based on the first aspect, or the first implementation manner of the first aspect, or the second implementation manner of the first aspect, or the third implementation manner of the first aspect, or the fourth implementation manner of the first aspect, or the fifth implementation manner of the first aspect, or the sixth implementation manner of the first aspect, or the seventh implementation manner of the first aspect, or the eighth implementation manner of the first aspect, or the ninth implementation manner of the first aspect, the embodiments of the present application further provide a tenth implementation manner of the first aspect: a working medium pump is arranged on the liquid return channel between the liquid collecting disc and the liquid return pipe. In this way, the liquid return flow can be increased according to the actual operation condition, for example, when the heat dissipation needs of each cabinet are not completely consistent, or when there is a high-power running period in the operation of part of the cabinets, the working medium pump can be used to realize the on-demand distribution of cold energy. The tenth implementation manner has good operability.

[0029] Based on the first aspect, or the first implementation of the first aspect, or the second implementation of the first aspect, or the third implementation of the first aspect, or the fourth implementation of the first aspect, or the fifth implementation of the first aspect, or the sixth implementation of the first aspect, or the seventh implementation of the first aspect, or the eighth implementation of the first aspect, or the ninth implementation of the first aspect, or the tenth implementation of the first aspect, the eleventh implementation of the first aspect is further provided in the embodiments of the present application: the machine room further comprises a buffer cavity which is arranged separately from the equipment cavity, and an inner door is arranged on the partition wall between the equipment cavity and the buffer cavity, and an outer door is arranged on the outer wall of the buffer cavity. During the operation of the data center, when the operator enters the machine room for maintenance, the operator can first open the outer door to enter the buffer cavity, and then close the outer door and open the inner door to enter the equipment cavity. After the operator completes the maintenance, the operator first opens the inner door to enter the buffer cavity, and then closes the inner door and opens the outer door to exit the machine room. In this way, based on the configuration of the buffer cavity, the escape loss of the vapor state working medium in the equipment cavity can be effectively reduced.

[0030] In actual applications, the equipment cavity can further include a normally closed exhaust port. Under normal circumstances, the exhaust port is in a closed state to maintain the reliable sealing of the equipment cavity. When the air volume in the equipment cavity reaches a certain degree, the exhaust port can be opened to exhaust the air in the cavity, so as to ensure that the working medium concentration in the equipment cavity meets the needs of heat dissipation performance.

[0031] In other actual applications, a safety valve can be arranged at the exhaust port. In this way, when the equipment in the equipment cavity operates abnormally and a high pressure condition occurs, when the abnormal pressure reaches the pressure setting value of the safety valve, the safety valve arranged at the exhaust port will be automatically opened, and the safety valve ensures safety through effective exhaust of the gas.

[0032] The second aspect of the embodiments of the present application provides a machine room for setting a cabinet, the machine room comprising a sealed equipment cavity and a fixed condensing unit, a water supply pipe and a return water pipe; the condensing unit comprising a condensing pipe and a liquid collecting disc, the water inlet of the condensing pipe being in communication with the water supply pipe, and the water outlet of the condensing pipe being in communication with the return water pipe; the liquid collecting disc being located below the condensing pipe, and the projections of the two on the floor surface of the machine room at least partially overlapping, and the liquid collecting disc being provided with a liquid outlet interface; the condensing unit being located above the cabinet arranged in the equipment cavity, and the liquid outlet interface of the liquid collecting disc being used to butt joint with the liquid return interface of the cabinet side to form a liquid return channel. In a use state, the vapor state working medium in the node is discharged into the equipment cavity of the machine room, the vapor state working medium rises and contacts the surface of the condensing pipe to exchange heat, the liquid state working medium which is liquefied by the cold drops into the liquid containing part of the liquid collecting disc, and the liquid outlet interface of the liquid collecting disc is used to butt joint with the liquid return interface of the liquid return pipe to form a liquid return channel, thereby constructing a phase change working medium working cycle. Compared with the traditional cabinet level sealing or node level sealing, the phase change liquid cooling architecture of the machine room level sealing provided in the embodiments of the present application can effectively reduce the overall sealing implementation cost.

[0033] In addition, based on the embodiment of the present application, the independent evolution of the CDU and the cabinet can be realized, the condensing unit is fully utilized according to the space layout of the machine room, the heat exchange capacity meeting the heat dissipation requirement of the cabinet can be obtained, and the problem that the overall heat exchange capacity of the condensing unit limits the performance evolution of the cabinet can be effectively avoided.

[0034] In addition, based on the relative position relationship that the condensing unit is located above the cabinet, the liquid working medium in the condensing unit can flow into the cabinet side through the liquid return channel, gravity liquid return is realized, and the liquid return driving power consumption can be further reduced. Overall, in order to ensure that the equipment in each cabinet in the data center machine room maintains continuous high-load operation and effectively improves the efficiency, good technical support is provided.

[0035] In actual application, in addition to the phase change immersion liquid cooling cabinet, cabinets or devices independently configured with heat dissipation structures can also be arranged in the machine room of the data center. For example, cabinets or devices with independent liquid cooling heat dissipation structures.

[0036] Based on the second aspect, the embodiment of the present application also provides a first implementation manner of the second aspect: the projection of the condensing pipe on the floor surface of the machine room coincides with the projection of the liquid collecting disc on the floor surface of the machine room; or the projection of the condensing pipe on the floor surface of the machine room is located in the projection of the liquid collecting disc on the floor surface of the machine room. In this way, it can be ensured that the liquid working medium condensed on the surface of the condensing pipe can reliably drop into the liquid collecting disc, the working medium liquid amount in the liquid cooling working cycle can be ensured, and the processing cost of recycling and reusing the liquid working medium can be reduced.

[0037] Based on the second aspect, or the first implementation manner of the second aspect, the embodiment of the present application also provides a second implementation manner of the second aspect: the condensing pipe of the condensing unit is obliquely arranged, the lower end of the condensing pipe is located in the projection of the liquid collecting disc on the floor surface of the machine room. In this way, the top space of the machine room is fully utilized to realize the lengthened arrangement of the condensing pipe, the condensing area for contacting with the gaseous working medium is increased, the condensing heat exchange efficiency is improved, and liquid drop splashing caused by high falling can be avoided, and the processing cost of recycling and reusing the liquid working medium is further reduced.

[0038] Based on the second aspect, or the first implementation manner of the second aspect, or the second implementation manner of the first aspect, the embodiment of the present application also provides a third implementation manner of the second aspect: the condensing unit further includes a water supply connector and a water return connector, the water inlet of the condensing pipe is in communication with the water supply connector, and the water supply connector is in communication with the water supply pipe; the water outlet of the condensing pipe is in communication with the water return connector, and the water return connector is in communication with the water return pipe; wherein a plurality of condensing pipes are connected in parallel between the water supply connector and the water return connector, and the plurality of condensing pipes form a condensing pipe group. In this way, the cooling water flowing into each condensing pipe of the condensing pipe group has a consistent low temperature, which can provide higher heat exchange capacity and effectively improve the heat dissipation capacity.

[0039] Exemplarily, the number of the condenser pipe groups can be multiple groups, and correspondingly, the number of the water supply pipes and the water return pipes are also multiple, and are arranged in one-to-one correspondence with each condenser pipe group. Based on the feature that the gaseous working medium generated by each cabinet is directly discharged into the equipment cavity of the machine room, the multiple condenser pipe groups jointly participate in the condensation and liquefaction of the gaseous working medium, which can realize pooling of heat exchange resources and further improve the utilization rate of the condensation side heat dissipation capacity of the architecture. At the same time, based on the pooling of heat exchange resources, the pressure influence that can be generated due to different node loads can be completely avoided.

[0040] In actual application, the condensation unit further comprises a liquid outlet pipe fixed on the liquid collecting disc and in communication with the liquid containing portion of the liquid collecting disc; the liquid return pipe and the liquid outlet pipe are arranged in extension along the vertical direction, the outer pipe end of the liquid outlet pipe extending downward forms a liquid outlet interface, and the outer pipe end of the liquid return pipe extending upward forms a liquid return interface. In this way, the gravity liquid return flow resistance can be reasonably controlled, the structure is simple and reliable, and the butt joint assembly operation can be conveniently performed.

[0041] Based on the second aspect, or the second implementation of the second aspect, or the third implementation of the second aspect, the embodiment of the present application further provides a fourth implementation of the second aspect: an operation and maintenance robot is arranged in the machine room. In actual application, the operation and maintenance robot can be communicatively interconnected with the data center master control system to perform corresponding operation and maintenance operations according to the maintenance requirements of the phase change liquid cooling architecture. For example, but not limited to, automatic predictive troubleshooting and analysis, full-automatic emergency disposal, etc. can be realized. In this way, the operation intensity of the operation personnel can be reduced, and the operation efficiency can be effectively improved.

[0042] In other actual applications, the external operator can also remotely monitor, and the operation and maintenance robot can perform corresponding operation and maintenance operations according to the instructions of the operator, and the man-machine cooperation can effectively improve the operation efficiency. With the growth of the data center business, the scale is also getting larger and larger, and the above technical advantages are particularly significant for the data center with high-density layout. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 A schematic diagram of a data center phase change liquid cooling architecture provided by the embodiment of the present application;

[0044] Figure 2 A Figure 1 A-A cross-sectional view in FIG. 1;

[0045] Figure 3 A Figure 1 B-B cross-sectional view in FIG. 1;

[0046] Figure 4 A schematic diagram of a machine room side principle of a data center phase change liquid cooling architecture provided by the embodiment of the present application;

[0047] Figure 5 for Figure 1 The diagram shows the configuration of the data center phase change liquid cooling architecture on the server room side.

[0048] Figure 6 for Figure 2 The diagram shows the assembly relationship of the condenser unit in the computer room.

[0049] Figure 7 A schematic diagram of a server rack provided for an embodiment of this application;

[0050] Figure 8 for Figure 7 Another angle view of the cabinet shown;

[0051] Figure 9 A schematic diagram illustrating the assembly relationship of a condensation unit provided in an embodiment of this application;

[0052] Figure 10 for Figure 9 CC partial view in the middle;

[0053] Figure 11 This application provides a schematic diagram illustrating the docking relationship between a cabinet and a condensation unit.

[0054] Figure 12 A top view of another data center phase change liquid cooling architecture provided in this application embodiment;

[0055] Figure 13 This is a top view of yet another data center phase change liquid cooling architecture provided in this application embodiment. Detailed Implementation

[0056] This application provides a heat management and distribution scheme for data center-level cooling to reasonably control overall sealing costs.

[0057] A data center is used to centrally process, store, transmit, exchange, and manage data. Typically, a data center's server room contains facilities and equipment including, but not limited to, servers, storage devices, switches, routers, and firewalls, to provide diverse and comprehensive computing capabilities. To meet the ever-increasing intelligent demands of various industries, the computing power of data centers is increasing in tandem, leading to a significant increase in heat flux. During operation, data center equipment generates a large amount of heat, making effective cooling systems crucial for maintaining normal equipment operation and extending hardware lifespan.

[0058] In order to ensure the stability and reliability of the data center, the research and development of liquid cooling technology has become a key link in the design of data center system, especially the immersion liquid cooling technology, which is concerned by the industry for its excellent heat dissipation capacity. Taking the data center server as an example, in the typical phase change immersion liquid cooling scheme related to the server, the CDU is configured in the server cabinet, the heat generated by the electronic components on the server node side is transferred to the liquid phase change working medium (hereinafter referred to as liquid working medium), and the vaporization occurs after reaching the boiling point of the working medium. The gaseous phase change working medium (hereinafter referred to as gaseous working medium) is liquefied at the condensing coil or condenser of the CDU, based on the heat management and distribution of the CDU, the liquid cooling working medium after releasing heat returns to the server node side and enters the next liquid cooling cycle. The integrated configuration of the CDU and the server cabinet requires the server side to provide node-level sealing or cabinet-level sealing, in order to reduce the loss of gaseous working medium and obtain reliable sealing, which is relatively high in cost.

[0059] In addition, the integrated configuration has a large overall weight, which is not conducive to transportation and deployment operation in the computer room. In addition, in order to meet the requirements of the whole machine transportation, the space available for the CDU is limited, which directly affects the overall heat dissipation capacity and cannot adapt to the performance evolution needs of the data center server.

[0060] Therefore, the embodiments of the present application provide a data center phase change liquid cooling architecture, which comprises a computer room, a phase change immersion liquid cooling cabinet located in the computer room, and a condensing unit, a water supply pipe and a return water pipe fixed to the computer room. The computer room has a sealed equipment cavity, and the condensing unit and the cabinet are arranged in the equipment cavity and above the cabinet. Here, "the condensing unit is above the cabinet" includes the case where the condensing unit is directly above the cabinet, and also includes the case where the condensing unit is above the side of the cabinet, in other words, the projection of the condensing unit and the cabinet on the floor surface of the computer room can be completely overlapped, partially overlapped or completely staggered.

[0061] The phase change immersion liquid cooling cabinet comprises a cabinet body, a node and a liquid return pipe, the node is arranged on the cabinet body, and the node can accommodate the phase change working medium in the cavity of the node case, so that the power devices to be cooled of the node are immersed in the liquid working medium. The node case comprises an exhaust opening and a liquid inlet, the gaseous working medium in the node case can be discharged into the equipment cavity of the computer room through the exhaust opening, the liquid return pipe is in communication with the liquid inlet of the node, and the liquid return pipe comprises a liquid return interface, and the liquid working medium can flow into the liquid return pipe through the liquid return interface, so as to be transported to the node case.

[0062] The phrase "the power device of the node is immersed in the liquid working medium" herein includes the case that the power device to be cooled is completely located below the liquid level of the working medium in the sealed area, i.e., complete immersion; and also includes the case that part of the structure of the power device to be cooled is located below the liquid level of the working medium, i.e., partial immersion. For partial immersion, for example, the cold capacity can be distributed according to the cooling requirements of different cabinets or nodes, and the liquid amount of the liquid working medium in the corresponding cabinet or node is controlled so that the power device to be cooled in the cabinet or node is partially immersed in the liquid working medium; for another example, according to the overall control strategy of system cold capacity distribution, the liquid working medium in the corresponding cabinet or node is returned with a liquid amount less than the vaporization amount of the working medium in a specific working period, so that the power device to be cooled in the cabinet or node is partially immersed in the liquid working medium, to reasonably regulate the system cold capacity.

[0063] The condensing unit includes a condensing pipe and a liquid collecting disc. The water inlet of the condensing pipe is in communication with the water supply pipe, and the water outlet of the condensing pipe is in communication with the water return pipe. The cooling water can flow into the condensing pipe through the water supply pipe, complete heat exchange and temperature rise, flow into the heat exchanger through the water return pipe, complete heat exchange and temperature drop, and then flow to the condensing unit through the water supply pipe. Thus, the cooling water working cycle of the secondary side is formed.

[0064] The liquid collecting disc is located below the condensing pipe, and the projections of the two on the floor surface of the machine room at least partially overlap, to collect the liquid working medium. The liquid collecting disc is provided with a liquid outlet interface. In this way, after the gaseous working medium in the node is discharged into the equipment cavity of the machine room, the gaseous working medium rises and contacts the surface of the condensing pipe to exchange heat, and the liquid working medium that is liquefied by the cold drops into the liquid containing part of the liquid collecting disc. The liquid outlet interface of the liquid collecting disc is used to butt joint with the liquid return interface of the liquid return pipe to form a liquid return channel. Thus, the phase change working medium working cycle is formed.

[0065] The data center phase change liquid cooling architecture provided by the embodiments of the present application adopts the architecture design of decoupling the condensing unit and the cabinet. After the cabinet enters, the liquid return channel between the condensing unit and the cabinet can be quickly formed by butt joint and communication of the liquid outlet interface provided by the condensing unit and the liquid return interface on the corresponding cabinet. The condensing unit and the cabinet are arranged in the sealed equipment cavity of the machine room, to form the machine room level sealed phase change liquid cooling architecture. In this way, the overall sealing implementation cost can be effectively reduced.

[0066] In addition, the condensing unit, the water supply pipe and the water return pipe are arranged on the machine room side, to realize independent evolution of the CDU and the cabinet. On the one hand, the size and weight of the cabinet can be reasonably controlled, to facilitate the transfer transportation operation of the cabinet and the deployment operation in the equipment cavity of the machine room, and effectively reduce the packaging cost, storage cost and transportation cost of the cabinet. At the same time, based on the structural characteristics that the condensing unit is arranged on the machine room side, the condensing unit can be fully arranged according to the space layout of the machine room, to obtain the heat exchange capacity meeting the cabinet cooling requirement, and the problem that the overall heat exchange capacity of the condensing unit limits the performance evolution of the cabinet can be effectively avoided.

[0067] In addition, for the phase change working cycle between the condensing unit and the cabinet, based on the relative position relationship that the condensing unit is located above the cabinet, the liquid working medium in the condensing unit can flow downward into the cabinet side through the liquid return channel to realize gravity liquid return, which can further reduce the liquid return driving power consumption and the PUE of the data center. Overall, in order to ensure that the equipment in each cabinet in the data center room maintains continuous high-load operation and effectively improves the efficiency, good technical support is provided.

[0068] In order to better understand the technical solutions and technical effects of the present application, without losing generality, specific embodiments will be described in detail below in combination with the drawings. Please refer to Figure 1 、 Figure 2 and Figure 3 , wherein, Figure 1 is a schematic diagram of a data center phase change liquid cooling architecture provided by an embodiment of the present application, Figure 2 is Figure 1 A-A cross-sectional view in Figure 3 is Figure 1 B-B cross-sectional view in. In order to simplify the view and clearly show the phase change liquid cooling architecture inside the room, Figure 2 and Figure 3 do not show the external structure of the cold tower and the like in

[0069] As shown in Figure 1 , the data center 100 is provided with a cold tower 51 outside the room 10, which is used to provide cooling water for the phase change liquid cooling architecture inside the room. In combination with Figure 2 and Figure 3 , the room 10 includes a device cavity 101 and a buffer cavity 102, the device cavity 101 is provided with a phase change immersion liquid cooling cabinet 20, and the buffer cavity 102 is a transition area for the operation and maintenance personnel to enter and exit the device cavity 101 from the external environment. For the sealed device cavity 101, the overall sealing implementation cost is relatively low. The outer door 103 is provided between the buffer cavity 102 and the external environment, that is, the outer wall of the buffer cavity 102 is provided with the outer door 103, and the inner door 104 is provided on the partition wall between the device cavity 101 and the buffer cavity 102.

[0070] It should be understood that for the sealed device cavity 101, in addition to the basic building structure, the opening and closing door and the like for the operator to enter and exit also need to maintain good sealing reliability in the closed state.

[0071] Exemplarily, two rows of cabinets 20 arranged in a row are shown in the figure. In a specific implementation, the number and arrangement of the cabinets 20 can be determined according to the space of the equipment cavity of the machine room 10, to form a multi-row and multi-column cabinet array, to provide diversified computing and comprehensive capabilities, which are not limited in the embodiments of the present application. Meanwhile, the cabinet 20 that achieves heat dissipation based on the phase change immersion liquid cooling technology can include nodes of different device types such as servers, storage devices, switches, routers, or firewalls, which can be selected according to the overall function design of the data center, and are not limited in the embodiments of the present application.

[0072] The data center phase change liquid cooling architecture provided by the embodiments of the present application is composed of a machine room side and a cabinet side.

[0073] The condensing unit 30 of the CDU and the water supply pipe 41 and the return water pipe 42 of the secondary side pipe network are all fixed to the machine room 10 and connected to the cooling tower 51 of the machine room water system through the secondary side pipe network, to distribute the cooling capacity of the cooling water to each cabinet 20 to be cooled. Please see Figure 4 and Figure 5 wherein, Figure 4 is a principle schematic diagram of the machine room side of the data center phase change liquid cooling architecture provided by the embodiments of the present application, Figure 5 is Figure 1 a schematic diagram of the machine room side of the data center phase change liquid cooling architecture shown in

[0074] As Figure 4 shown, the machine room water system 50 includes a cooling tower 51, a primary pump 52, a primary side pipe network 53, a heat exchanger 54, and a secondary pump 55. The cooling tower 51 is connected to the heat exchanger 54 through the water supply pipe and the return water pipe of the primary side pipe network 53, and the cooling tower 51 and the water supply pipe of the primary side pipe network 53 are provided with the primary pump 52, thereby constructing a primary side cooling water circulation (solid arrows in Figure 4 ). The heat exchanger 54 is connected to the water supply pipe 41 and the return water pipe 42 of the secondary side pipe network, and the heat exchanger 54 and the water supply pipe 41 are provided with the secondary pump 55, thereby constructing a secondary side cooling water circulation (solid arrows in Figure 4 ). During operation, the cooling water flowing out of the condensing pipe 33 of the condensing unit is heated and completes heat exchange in the heat exchanger 54 to become low-temperature cooling water, and the low-temperature cooling water is transported to the condensing pipe 33 of the condensing unit through the water supply pipe 41 under the action of the secondary pump 55.

[0075] It should be noted that the machine room water system 50 can also adopt other configuration forms, and is not limited to the system composition shown in the figure. For example, but not limited to, the cooling source of the machine room water system can also be a water source in the natural environment, and is not limited to a cooling tower, as long as it can provide a distribution that meets the cooling capacity required by the equipment in the machine room and can take out the heat from the machine room. The embodiments of the present application are not limited.

[0076] As shown in Figure 5 , the cold tower 51 as a cold source is arranged outside the machine room 10, and the condensing unit 30, the water supply pipe 41 and the return water pipe 42 are all fixed inside the equipment cavity 101 of the machine room 10. In a specific implementation, other components of the machine room water system can also be arranged outside the machine room (not shown in the figure). Of course, in other possible implementation schemes, the components of the machine room water system can also be arranged inside the machine room 10.

[0077] Please also refer to Figure 2 , Figure 3 and Figure 6 , wherein, Figure 6 is the assembly relationship diagram of the condensing unit in the machine room shown in Figure 2 .

[0078] The condensing unit 30 located on the machine room side is located above the cabinet 20. Compared with the traditional implementation scheme of integrating the CDU on the cabinet, the wiring distance between the associated cabinets in the data center machine room can be reasonably controlled, which can effectively reduce the link loss of the high-speed transmission signal link and ensure the signal integrity.

[0079] In the embodiment, the condensing unit 30 includes a condensing pipe 33, a liquid collecting tray 32 located below the condensing pipe 33, and a liquid outlet interface 311. In a specific implementation, the projection of the condensing pipe 33 on the floor surface of the machine room coincides with the projection of the liquid collecting tray 32 on the floor surface of the machine room, so that the liquid state working medium condensed on the surface of the condensing pipe 33 can reliably drip into the liquid collecting tray 32. In other specific implementations, the projection of the condensing pipe 33 on the floor surface of the machine room is located within the projection of the liquid collecting tray 32 on the floor surface of the machine room; that is, the liquid collecting tray 32 has a relatively large size, which can further ensure that the liquid state working medium can be effectively collected.

[0080] The gaseous working medium in the machine room 10 is liquefied after contacting the surface of the condensing pipe 33, and the liquid working medium can drip into the liquid containing part 321 of the liquid collecting tray 32. The liquid collecting tray 32 is provided with a liquid outlet interface 311 which communicates with the liquid containing part 321. Correspondingly, the liquid return interface 221 is arranged on the side of the cabinet 20, the cabinet 20 is built-in in the equipment cavity 101 of the machine room 10, the gaseous working medium generated by the operation of each node 23 of the cabinet 20 is discharged into the equipment cavity 101, and the liquid return interface 221 of the cabinet 20 is connected with the liquid outlet interface 311 of the condensing unit 30, so as to collect the liquid working medium in the liquid collecting tray 32 and return it to the cabinet 20. The liquid working medium is returned to the cabinet 20, and the phase change working medium working cycle is formed.

[0081] During the operation of the data center, when the operator enters the machine room for maintenance, the outer door 103 can be opened to enter the buffer cavity 102 first, and then the inner door 104 is closed to enter the equipment cavity 101. Conversely, after the operator completes the maintenance, the inner door 104 is opened to enter the buffer cavity 102 first, and then the outer door 103 is opened to exit the machine room. In this way, based on the configuration of the buffer cavity 102, the escape loss of the vapor working medium in the equipment cavity can be effectively reduced.

[0082] As shown in Figure 3 , the working medium collecting part 106 can also be arranged at the bottom of the sealingly arranged equipment cavity 101. In a specific implementation, the working medium collecting part 106 can be lower than the floor surface of the equipment cavity 101, or a drainage structure communicating with the working medium collecting part 106 can also be arranged on the floor surface. In this way, the liquid working medium not collected in the liquid collecting pan 32 can be collected and reused. The liquid working medium collected through the working medium collecting part 106 can be purified and then pumped to the liquid collecting pan for reuse. In a specific implementation, the operation and maintenance process of the data center can be implemented, which will not be described here.

[0083] Please see Figure 7 and Figure 8 , wherein, Figure 7 is a schematic diagram of a cabinet provided by an embodiment of the present application, Figure 8 is Figure 7 another angle schematic diagram of the cabinet shown in

[0084] In a specific implementation, the cabinet 20 includes a cabinet body 21, a liquid return pipe 22, and nodes 23. The nodes 23 are located in the cabinet body 21, and the liquid return pipe 22 is fixed on the cabinet body 21. The inner cavity of the case 231 of each node 23 can contain phase change working medium, so that the power device 232 to be cooled of the node is immersed in the liquid working medium. Here, the power device 232 to be cooled includes but is not limited to processor chips, memory bars, network card chips, and SSD disks, etc. For different types of node devices, the power device to be cooled can be different types of devices.

[0085] In the height direction of the case 231, the inner cavity of the case can form a liquid phase zone at the bottom and a gas phase zone at the top. The case 231 includes an exhaust opening 2311 and a liquid inlet 2312. The exhaust opening 2311 is located in the gas phase zone, so that the vapor working medium in the node case 231 is discharged into the equipment cavity 101 through the exhaust opening 2311. The liquid inlet 2312 is located in the liquid phase zone, and the liquid return pipe 22 communicates with the liquid inlet 2312 of each node. The liquid working medium can flow into the liquid return pipe 22 through the liquid return interface 221 based on gravity, so as to be transported to the node case 231, so that the liquid level of the liquid working medium can always be higher than the power device 232 to be cooled, meeting the functional needs of immersion heat exchange.

[0086] AgainFigure 8 As shown, to increase the flowability of the liquid working medium in the node cabinet 231, further, the low-temperature liquid working medium can be directly guided to the upper part of the power device 232 through the liquid guide pipe 233 in communication with the liquid inlet 2312, effectively improving the heat dissipation capacity of the power device 232. It can be understood that the liquid guide pipe 233 can be selectively configured in different application scenarios.

[0087] In specific implementations, the size and shape of the exhaust opening 2311 can be selected as needed, and the embodiments of the present application are not limited. During the operation of the node 23, if the liquid working medium replenishment liquid is relatively large, the liquid working medium can be automatically discharged from the node cabinet 231 through the exhaust opening 2311.

[0088] In other specific implementations, the liquid inlet 2312 is not limited to being located in the liquid phase zone. Based on the characteristics of the cavity intercommunication in the cabinet 231, the liquid inlet 2312 can also be configured in the gas phase zone. Compared with, the liquid inlet 2312 configured in the liquid phase zone can directly transport the liquid working medium to the liquid phase zone for immersion of the power device, avoiding the generation of flow disturbance and affecting the heat exchange efficiency.

[0089] In the present embodiment, each node 23 in the cabinet 20 is arranged in the height direction in sequence, that is, a vertical cabinet. For example Figure 8 As shown, the liquid return pipe 22 extends out of the cabinet body 21 in the vertical direction, and the liquid return interface 221 is located at the top of the liquid return pipe 22, so that the butt joint with the liquid outlet interface 311 on the side of the condensing unit 30 is facilitated, and the gravitational liquid return flow resistance is reasonably controlled. At the same time, the liquid return pipe 22 is arranged in the vertical direction, does not occupy the layout space of the cabinet in the horizontal plane, meets the trend design requirement of high-density layout. Of course, in other possible implementation schemes, the liquid return pipe 22 extending out of the cabinet body 21 can also be arranged at an angle with the vertical direction, and the liquid return interface 221 can also be arranged to be not directly opposite the condensing unit in the vertical direction, to adapt to different butt joint implementation manners. The embodiments of the present application are not limited.

[0090] In other implementation manners, each node 23 in the cabinet 20 can also be arranged in sequence in the horizontal plane, that is, a horizontal cabinet. Based on the liquid return pipe 22, a phase change working medium working cycle can be constructed between each node 23 in the cabinet and the condensing unit 30. The embodiments of the present application are not limited.

[0091] Please refer to Figure 3 , Figure 6 and Figure 9 , wherein Figure 9 is a schematic diagram of the assembly relationship of a condensing unit provided by an embodiment of the present application. Exemplarily, Figure 9 in which the condensing unit 30 corresponding to two rows of cabinets 20 is shown, and the condensing unit 30 includes condensing pipes 33 arranged in rows and a liquid collecting disc 32.

[0092] The inlet of condenser pipe 33 is connected to water supply pipe 34, which in turn is connected to water supply pipe 41; the outlet of condenser pipe 33 is connected to return water pipe 35. Return water pipe 35 is connected to return water pipe 42. Figure 9 As shown, cooling water can flow into the condenser tube 33 through the water supply pipe 41 and the water supply pipe 34 of the condenser unit 30. After completing heat exchange and heating, the cooling water flows into the heat exchanger through the return water pipe 35 and the return water pipe 42 of the condenser unit 30. After completing heat exchange and cooling, the cooling water can flow back to the condenser unit 30 through the water supply pipe 41.

[0093] To increase the condensation heat exchange area, the condenser tube 33 located above the cabinet 20 can be installed at an angle, utilizing the overhead space of the computer room 10 to extend the condenser tube 33. This effectively increases the condensation area for contact with the gaseous working fluid, improving condensation heat exchange efficiency. Simultaneously, the projection of the lower end of the condenser tube 33 onto the computer room floor falls within the projection of the liquid collection tray 32 onto the computer room floor. The working fluid that liquefies upon contact with the surface of the condenser tube 33 can be guided by the angled condenser tube 33 to quickly fall into the liquid collection tray 32 below it, preventing splashing of liquid droplets from a high position.

[0094] In a practical implementation, for the inclined condenser tubes 33, the inlet of each condenser tube 33 can be positioned higher than the outlet, so that the cooling water can flow rapidly within the condenser tube 33.

[0095] For the condenser tubes 33 in the condensation unit 30, a serpentine, meandering arrangement can be adopted in the tube layout plane, for example... Figure 6 and Figure 9 As shown, the condenser tube 33 includes multiple sequentially connected extension tube sections 331 and bent tube sections 332, forming a meandering shape. This allows for full utilization of the available space in the condenser unit 30 to provide heat exchange area. For example, the extension tube section 331 can be a straight tube section as shown in the figure, with adjacent straight tube sections connected by the bent tube section 332, offering good manufacturability.

[0096] To further improve heat exchange efficiency, multiple condenser tubes 33 can be installed above the cabinet 20. These condenser tubes 33 are arranged in layers, with the inlet of each condenser tube 33 connected to the water supply pipe 34 and the outlet of each condenser tube 33 connected to the water return pipe 35. In other words, multiple condenser tubes 33 are connected in parallel between the water supply pipe 34 and the water return pipe 35. This ensures that the cooling water flowing into each condenser tube 33 has a relatively uniform low temperature, and the layered arrangement of the condenser tubes 33 provides a higher heat exchange capacity, effectively improving heat dissipation.

[0097] In practice, each serpentine condenser tube 33 can be spaced apart in the vertical direction, and the extension tube sections 331 of adjacent condenser tubes 33 are staggered. Thus, a large cooling contact area can be provided in the vertical direction within the condensation unit 30, providing a good technical guarantee for ensuring heat exchange efficiency.

[0098] Furthermore, the condenser tubes 33 and the liquid collection tray 32 of the condensation unit 30 can be configured one-to-one with those of the cabinet 20. For example... Figure 6 , Figure 9 and Figure 10 As shown, where, Figure 10 for Figure 9 The C-direction local view in the text.

[0099] The condenser tubes 33 can be arranged in layers to form condenser tube groups 33a. Corresponding to the rows of cabinets 20, multiple condenser tube groups 33a are also arranged in rows sequentially. For each condenser tube group 33a, a pair of supply water pipes 34 and return water pipes 35 are provided. The condenser tubes 33 of the condenser tube group 33a are connected in parallel between the corresponding supply water pipes 34 and return water pipes 35. In this way, the flow path of cooling water in the condenser tubes 33 can be shortened to a certain extent, and the flow resistance can be reduced to improve the heat exchange efficiency.

[0100] Based on the characteristic that the gaseous working fluid generated by each cabinet 20 is directly discharged into the equipment cavity of the computer room, multiple sets of condenser tubes 33a jointly participate in the condensation and liquefaction of the gaseous working fluid, which can realize the pooling of heat exchange resources and further improve the utilization rate of the condenser side heat dissipation capacity of the architecture. At the same time, based on the pooling of heat exchange resources, the pressure impact that may be caused by different node loads can be completely avoided.

[0101] Meanwhile, the number of liquid collection trays 32 can also be set to multiple, with each liquid collection tray 32 corresponding to a cabinet 20 and a condenser tube assembly 33a. Accordingly, a liquid outlet pipe 31 is fixedly installed on the liquid collection tray 32, and each liquid collection tray 32 is connected to the return pipe 22 of the corresponding cabinet 20 through the liquid outlet pipe 31.

[0102] Of course, in other specific implementations, for multiple sets of condenser tubes 33a arranged in a row, the liquid collection tray 32 can also be set as one (not shown in the figure). The liquid collection tray 32 is provided with multiple liquid outlet pipes 31, which are respectively connected to each cabinet 20 below. The liquid working fluid condensed on the surface of each condenser tube set 33a is collected in a liquid collection tray 32, realizing the centralized distribution of liquid working fluid to each cabinet 20.

[0103] In other specific implementations, the condenser tube group 33a of the condenser unit 30 and the cabinet 20 can also be configured in a non-one-to-one correspondence manner.

[0104] In addition, in order to improve the heat exchange capacity of the condensing unit 30, the projection area of the condensing pipe 33 and the liquid collecting tray 32 on the floor of the machine room can be greater than the projection area of the cabinet 20 on the floor of the machine room, for example, but not limited to, arranging the condensing unit 30 above the space between the cabinets. In this way, according to the heat dissipation requirements of the equipment in the machine room, the overall heat exchange capacity can be improved by fully utilizing the top space of the equipment cavity of the machine room 10.

[0105] Exemplarily, as shown in Figure 10 , the water supply pipe 34 and the water return pipe 35 are arranged in a direction perpendicular to the pipe arrangement plane of the condensing pipe 33 to reasonably control the flow resistance and improve the heat exchange efficiency. In other possible implementation schemes, in order to meet the overall layout requirements of the architecture, the water supply pipe 34 and the water return pipe 35 can also be arranged as needed by bending, rather than being limited to extending in a direction perpendicular to the pipe arrangement plane of the condensing pipe.

[0106] Among them, the liquid outlet pipe 31 is arranged in the vertical direction, and the downwardly extending outer pipe end forms a liquid outlet interface 311 for docking with the liquid return interface 221 on the side of the cabinet 20, which can reasonably control the gravity liquid return flow resistance. Please refer to Figure 11 , which is a schematic diagram of the docking relationship between the cabinet and the condensing unit provided by the embodiment of the present application.

[0107] In order to bring air into the equipment cavity 101 when the maintenance personnel enter the equipment cavity 101, a normally closed exhaust port 105 can be arranged in the sealed equipment cavity 101. Under normal circumstances, the exhaust port 105 is in a closed state to maintain the reliable sealing of the equipment cavity 101. When the air volume in the equipment cavity 101 reaches a certain degree, the exhaust port 105 can be opened to exhaust the air in the cavity, so as to ensure that the working medium concentration in the equipment cavity 101 meets the needs of the heat dissipation performance.

[0108] Further, in order to improve the safety and reliability of the data center liquid cooling heat dissipation architecture, a safety valve (not shown in the figure) can also be arranged at the exhaust port 105. The safety valve can be automatically opened based on a preset opening pressure. In this way, when the equipment in the equipment cavity 101 abnormally operates and a high pressure condition occurs, when the abnormal pressure reaches the pressure setting value of the safety valve, the safety valve arranged at the exhaust port 105 will be automatically opened, and the safety is guaranteed by effectively exhausting the gas.

[0109] In order to improve the condensation efficiency of the vapor working medium, optionally, the exhaust openings 2311 of the node cabinets 231 on the cabinet 20 can be located on the same side of the cabinet body 21, and the exhaust openings 2311 and the condensing pipe 33 are enclosed in the same collection area by the baffle and the cabinet body 21 and the liquid collecting tray 32.

[0110] In combination with Figure 3 , Figure 5 and Figure 6In the embodiment, the exhaust openings 2311 of the node cabinets 231 of the two adjacent rows of cabinets 20 are oppositely arranged, the baffle 80, the cabinet body 21 and the liquid collecting tray 32 form the collection area S, the exhaust openings 2311 of the node cabinets 231 oppositely arranged on the two rows of cabinets 20 and the condensing pipes 33 above the two rows of cabinets are located in the same collection area S. In this way, the steam state working medium can be ensured to flow to the condensing pipes 33 in the collection area S and fully contact the corresponding condensing pipes 33 to complete the condensation and liquefaction, thereby effectively improving the heat exchange efficiency.

[0111] For the two rows of cabinets 20 arranged adjacent to each other, the baffle 80 can include two first baffles 81 and two second baffles 82. Figure 11 As shown, the liquid collecting tray 32 includes a first side edge 322 and a second side edge 323 oppositely arranged, the first side edge is located on one side close to the collection area S, and the second side edge is located on the other side away from the collection area S. The first baffle 81 is fixedly connected between the first side edge 322 of the liquid collecting tray 32 and the cabinet body 21 of the cabinet 20, and the second baffle 82 is fixedly connected between the second side edge 323 of the liquid collecting tray 32 and the top wall of the equipment cavity 101.

[0112] In a specific implementation, in combination with Figure 6 As shown, in the direction in which the cabinets are arranged in rows, a third baffle 83 can also be arranged to be fixedly connected with the board ends of the two first baffles 81 and the two second baffles 82. For simplicity of illustration and clear illustration of the inside assembly relationship, Figure 6 As shown, only part of the third baffle 83 located at one end of the second baffle 82 is shown, and the third baffle 83 can be fixedly connected with the same side board end of the first baffle 81 and the second baffle 82. The two third baffles 83 are fixedly connected with the two side board ends of the first baffle 81 and the second baffle 82, respectively, to form the collection area S.

[0113] In other possible implementations, the first baffle 81 and the second baffle 82 can be fixedly connected with the side wall of the equipment cavity 101, and a corresponding collection area can also be formed. In other words, according to the overall design requirement of the machine room, the third baffle 83 can be selectively configured, as long as it can form a collection area capable of improving the heat exchange efficiency, and the embodiments of the present application are not limited.

[0114] In the embodiment, the condensing unit 30 fixedly arranged on the side of the machine room 10 is located above the cabinet 20. In this way, when the power device in the phase change immersion liquid cooling node generates heat and the liquid working medium is heated to above the boiling point, the liquid working medium vaporizes, as shown by the dotted arrow in Figure 11 The steam state working medium is discharged from the node 23 into the collection area S and rises to contact the condensing pipe 33 located in the collection area S, and is liquefied after being cooled, as shown by the dotted arrow in Figure 11As shown by the medium solid arrow, the liquid working medium dropped is collected in the liquid collecting tray 32, and can flow out of the liquid collecting tray 32 of the condensing unit based on the self weight, and is re-input into each node 23 through the liquid return pipe 22 of the cabinet 20 to complete a liquid cooling cycle.

[0115] In a specific implementation, in the height direction, the liquid outlet interface 311 of the liquid outlet pipe 31 and the liquid return interface 221 on the side of the cabinet 20 can be connected through a liquid path transition connector (not shown in the figure). On the one hand, the size control of the matching connection can be reasonably controlled, and on the other hand, the operability of the cabinet into the field assembly can be improved based on the setting of the corresponding transition connector. It can be understood that the liquid path transition connector can be implemented by using the prior art, which will not be described here.

[0116] For the cabinet 20 arranged in a row, the side of the exhaust opening is the non-maintenance side S1 of the cabinet, and the opposite side of the exhaust opening is the maintenance side S2 of the cabinet. When maintenance is needed, the node 23 can be pulled out from the maintenance side S2 of the cabinet, and after operation and maintenance, the node 23 can be inserted into the cabinet body in the reverse direction. Figure 11 As shown by the medium arrow D, the node 23 can be pulled out from the maintenance side S2 of the cabinet, and after operation and maintenance, the node 23 can be inserted into the cabinet body in the reverse direction. Based on the collection area S formed by the baffle, the operation and maintenance can be carried out under the condition that the machine is not stopped, and the fault cabinet or the fault node can be repaired and maintained, so that the influence of the liquid working medium dropping can be avoided to the maximum extent.

[0117] It should be noted that the "maintenance side S2 of the cabinet" here refers to a higher operation and maintenance frequency compared to the "non-maintenance side S1 of the cabinet", that is, the operation and maintenance frequency of the "non-maintenance side S1 of the cabinet" is relatively low, and does not refer to the situation that no maintenance is needed on the "non-maintenance side S1 of the cabinet".

[0118] In other possible implementations, for the cabinet 20 arranged in a row, the cabinet non-maintenance side S1 and the cabinet maintenance side S2 can not be configured in a differentiated manner, and correspondingly, the baffle 80 is not needed to form the collection area S of the guiding vapor working medium. In this way, the outer periphery of the node cabinet 231 on the side of the cabinet 20 can exhaust the vapor working medium (not shown in the figure), and specifically, the setting position of the exhaust opening on the cabinet 231 can be determined as needed, and can rise to the condensing unit 30 to exchange heat with the condensing pipe 33.

[0119] For each node 23 in the cabinet 20, the liquid return amount of the liquid working medium can be allocated according to the actual heat dissipation requirement of the node. In a specific implementation, a flow valve 70 (as shown) can be arranged between the liquid return pipe 22 and the liquid inlet of the node 23, so as to adjust the opening of the flow valve 70 according to the actual heat dissipation requirement, and realize the on-demand allocation of cooling capacity. Figure 8

[0120] ​For each rack 20 within the equipment cavity of the computer room 10, when the heat dissipation requirements of each rack are roughly the same, the liquid working fluid in the condenser unit's collection tray 32 flows downwards by gravity into the corresponding rack 20, achieving on-demand distribution of cooling capacity. This saves on the configuration and operating costs of pumping components. In a specific implementation, a working fluid pump 60 (such as...) can also be installed on the return liquid channel between the condenser unit's collection tray 32 and the corresponding rack 20. Figure 11 As shown in the figure, the return fluid flow rate can be increased according to the actual operating conditions. For example, when the heat dissipation requirements of each cabinet are not completely consistent, or when some cabinets have high power consumption operation periods, the working fluid pump can be used to distribute the cooling capacity on demand.

[0121] In addition, to simplify the secondary side piping network, the supply water pipe 41 and the return water pipe 42 can be configured as an enclosed ring pipe, connecting to the supply water pipe 34 and the return water pipe 35 of each condensing unit 30 respectively, forming a cooling water working cycle on the secondary side. This configuration can reasonably control flow resistance. In a specific implementation, the projection of the supply water pipe 41 on the computer room floor can be located inside the projection of the return water pipe 42 on the computer room floor. Of course, in other specific implementations, the projection of the supply water pipe 41 on the computer room floor can also be located outside the projection of the return water pipe 42 on the computer room floor. This application embodiment is not limited.

[0122] Furthermore, based on the decoupling architecture of the condensing unit and the cabinet provided in this application embodiment, the height space within the equipment cavity 101 of the computer room 10 can be fully utilized and rationally allocated to the condensing unit 30, increasing the volume of the condensing unit 30 without increasing its space occupation in the horizontal plane. In other words, by increasing the available space for the condensing pipe 33, the heat exchange capacity is improved.

[0123] It should be noted that, in addition to the phase change immersion liquid-cooled cabinet 20 that achieves heat dissipation based on the aforementioned data center phase change liquid cooling architecture, the server room 10 of this data center can also be equipped with cabinets or equipment with independently configured heat dissipation structures. For example, cabinets or equipment using independent liquid cooling structures. This application embodiment is not limited to this.

[0124] In the aforementioned implementation scheme, the water supply pipe 41 and return pipe 42 are fixed inside the equipment cavity of the machine room 10. In a specific implementation, the water supply pipe 41 and return pipe 42 of the secondary side network can also be arranged outside the machine room (not shown in the figure). Both can be connected to the condensing unit 30 fixed inside the machine room 10 through the top wall of the machine room 10. In this way, when the water supply pipe 41 and return pipe 42 need to be inspected and maintained, the operators do not need to enter the machine room, which can further reduce the impact of operation and maintenance on the environment inside the machine room.

[0125] Other functional components and specific implementations can be the same as those in the aforementioned embodiments. They will not be repeated here.

[0126] In the foregoing embodiment, the two rows of cabinets 20 and the corresponding condensing units 30 form a collection area S, which realizes the pooling management and distribution of heat dissipation resources. In other specific implementations, multiple groups of cabinets 20 arranged adjacently in rows can be arranged in the computer room, and corresponding condensing units 30 can be arranged correspondingly.

[0127] Please refer to Figure 12 , which is a top view of another data center phase change liquid cooling architecture provided by the embodiment of the application. In order to clearly show the difference and connection between the present embodiment and the foregoing embodiment, the same function is schematically shown in the figure with the same reference numeral.

[0128] As Figure 12 shown, eight groups of cabinets 20 arranged in rows are arranged in the computer room 10, each group of cabinets 20 including a first row of cabinets 20a and a second row of cabinets 20b arranged adjacently, and each row of cabinets including multiple cabinets 20. Each group of cabinets (20a, 20b) arranged in rows can be distributed with cold energy by the foregoing condensing unit 30. Similarly, the condensing pipes and liquid collecting trays of the condensing unit can be arranged in rows and arranged one-to-one with the cabinets arranged in rows, respectively.

[0129] In other specific implementations, the number of arrangements of the cabinet array in the computer room 10 can be determined according to the overall design of the data center. The embodiment of the application does not limit this.

[0130] The specific implementation of other functional components can be consistent with the foregoing embodiment. Here, it will not be described again.

[0131] Next, the operation process of the operating personnel for the computer room provided by the embodiment of the application is briefly described.

[0132] First, the operating personnel entering the computer room 10 need to wear an oxygen mask, and should wear a clean work suit. On the one hand, it can avoid that the low oxygen content in the equipment cavity 101 affects the safety of the operating personnel, and on the other hand, it can avoid that the operating personnel carries impurities, which affects the operating environment in the equipment cavity 101.

[0133] When the operating personnel enters the computer room, first opens the outer door 103 to enter the buffer cavity 102, injects air into the buffer cavity 102 after closing the outer door 103, so that the pressure in the buffer cavity 102 is slightly higher than that in the equipment cavity 101, and then opens the inner door 104 to enter the equipment cavity 101. In this process, based on the relatively high pressure in the buffer cavity 102, the amount of escape of the vapor state working medium in the equipment cavity 101 can be effectively controlled when the inner door 104 is opened, which can reduce the operation and maintenance cost.

[0134] When the operator leaves the machine room, air is first injected into the buffer cavity 102, so that the pressure in the buffer cavity 102 is slightly higher than that in the equipment cavity 101, and then the inner door 104 is opened to enter the equipment cavity 101. After the inner door 104 is closed, the operator can open the outer door 103 and leave the machine room.

[0135] It should be understood that during operation and maintenance, based on the structural characteristics of the machine room level sealing, the gaseous working medium and the liquid working medium that drips in the internal environment of the machine room inevitably affect the work efficiency of the operation and maintenance personnel. In order to further improve the operation and maintenance efficiency, as shown in Figure 12 , an operation and maintenance robot 90 can be arranged in the machine room. The operation and maintenance robot 90 can be communicatively interconnected with the data center master control system to perform corresponding operation and maintenance operations according to the maintenance requirements of the phase change liquid cooling architecture. For example, but not limited to, automatic predictive troubleshooting and analysis, fully automatic emergency disposal, etc. can be realized. In this way, the work intensity of the operation and maintenance personnel can be reduced, and the work efficiency can be effectively improved.

[0136] In a specific implementation, the external operator can also remotely monitor, and the operation and maintenance robot 90 can perform corresponding operation and maintenance operations according to the instructions of the operator. The man-machine cooperation can effectively improve the work efficiency. In particular, with the growth of data center business, the scale is also getting larger and larger, and for the high-density layout data center, the above technical advantages are particularly significant.

[0137] In other specific implementations, based on the arrangement of the operation and maintenance robot 90, the buffer cavity can no longer be configured. Please refer to Figure 13 , which is a top view of another data center phase change liquid cooling architecture provided by the embodiments of the present application. In order to clearly show the difference and connection between the present embodiment and the foregoing embodiments, the same function is shown in the figure with the same mark.

[0138] Compared with the embodiments described in Figure 12 , the machine room 10 shown in Figure 13 includes an equipment cavity 101, and no buffer cavity is configured. At the same time, the equipment cavity 101 can be provided with a work window 107, so as to open the work window 107 to realize the interaction of tools and materials according to the work requirements of the operation and maintenance robot 90. In this way, the sealing of the equipment cavity 101 can be further guaranteed.

[0139] It should be understood that other functional components of the data center can be implemented according to the prior art, and therefore this document will not be described in detail.

[0140] The above is only a preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A data center phase change liquid cooling architecture, comprising: The data center phase change liquid cooling architecture comprises a machine room, a cabinet, and a condensing unit, a water supply pipe and a return water pipe fixed to the machine room; The machine room comprises a sealed equipment cavity, the cabinet and the condensing unit are located in the equipment cavity, and the condensing unit is located above the cabinet; The cabinet comprises a cabinet body, a node and a liquid return pipe, the node and the liquid return pipe are arranged on the cabinet body, the node comprises a case and a power device to be cooled arranged in the case, the case comprises an exhaust opening and a liquid inlet, and an inner cavity of the case can accommodate a phase change working medium; the liquid return pipe communicates with the liquid inlet of the case, and the liquid return pipe comprises a liquid return interface; The condensing unit comprises a condensing pipe and a liquid collecting disc, a water inlet of the condensing pipe communicates with the water supply pipe, and a water outlet of the condensing pipe communicates with the return water pipe; the liquid collecting disc is located below the condensing pipe, and projections of the two on the machine room floor surface at least partially overlap, the liquid collecting disc is provided with a liquid outlet interface, and the liquid outlet interface of the liquid collecting disc and the liquid return interface of the liquid return pipe are connected to form a liquid return channel.

2. The data center phase change liquid cooling architecture of claim 1, wherein, The projection of the condensing pipe on the machine room floor surface coincides with the projection of the liquid collecting disc on the machine room floor surface; or the projection of the condensing pipe on the machine room floor surface is located within the projection of the liquid collecting disc on the machine room floor surface.

3. The data center phase change liquid cooling architecture of claim 1 or 2, wherein, The condensing pipe is arranged obliquely, and the lower end of the condensing pipe is located within the projection of the liquid collecting disc on the machine room floor surface.

4. The data center phase change liquid cooling architecture of claim 3, wherein, The water inlet of the condensing pipe is arranged higher than the water outlet.

5. The data center phase change liquid cooling architecture of any of claims 1-4, wherein, The condensing unit further comprises a water supply connecting pipe and a return water connecting pipe; the water inlet of the condensing pipe communicates with the water supply connecting pipe, and the water supply connecting pipe communicates with the water supply pipe; the water outlet of the condensing pipe communicates with the return water connecting pipe, and the return water connecting pipe communicates with the return water pipe; a plurality of condensing pipes are arranged in parallel between the water supply connecting pipe and the return water connecting pipe, and the plurality of condensing pipes form a condensing pipe group.

6. The data center phase change liquid cooling architecture of claim 5, wherein, The number of the condensing pipe groups is multiple, the number of the water supply connecting pipes and the number of the return water connecting pipes are both multiple, and the water supply connecting pipes and the return water connecting pipes are arranged one by one corresponding to the condensing pipe groups.

7. The data center phase change liquid cooling architecture of claim 5 or 6, wherein, The water supply connecting pipes and the return water connecting pipes are arranged in extension in a direction perpendicular to the pipe arrangement plane of the condensing pipes.

8. The data center phase change liquid cooling architecture of any of claims 1-7, wherein, The condensing unit further comprises a liquid outlet pipe, the liquid outlet pipe is fixed to the liquid collecting disc and communicates with a liquid containing portion of the liquid collecting disc; the liquid return pipe and the liquid outlet pipe are both arranged in extension along a vertical direction, and an outer pipe end of the liquid outlet pipe extending downward forms the liquid outlet interface communicating with the liquid return pipe.

9. The data center phase change liquid cooling architecture of any of claims 1-8, wherein, The water supply pipe and the return water pipe are located in the equipment cavity, the water supply pipe and the return water pipe are both annular pipes, the projection of the water supply pipe on the machine room floor surface is located on the inner side of the projection of the return water pipe on the machine room floor surface, or the projection of the water supply pipe on the machine room floor surface is located on the outer side of the projection of the return water pipe on the machine room floor surface.

10. The data center phase change liquid cooling architecture of any of claims 1-9, wherein, The number of the cabinets is multiple, and the multiple cabinets are arranged in multiple rows, and adjacent two rows of the cabinets are arranged at intervals.

11. The data center phase change liquid cooling architecture of claim 10, wherein, The condensing pipe and the liquid collecting disc of the condensing unit are arranged in rows, and are arranged one by one corresponding to the cabinets arranged in rows.

12. The data center phase change liquid cooling architecture of claim 11, wherein, The data center phase change liquid cooling architecture further comprises a baffle, the cabinet comprises a plurality of nodes, the exhaust opening of the cabinet of each node is located on the same side of the cabinet body, the baffle, the collecting tray and the cabinet body form a collection area, and the exhaust opening and the condensing pipe are located in the collection area.

13. The data center phase change liquid cooling architecture of claim 12, wherein, The baffle forming the collection area comprises a first baffle and a second baffle, the first baffle is fixedly connected between the first side of the collecting tray and the cabinet body, and the second baffle is fixedly connected between the second side of the collecting tray and the top wall of the equipment cavity; the first side is the side of the collecting tray close to the collection area, and the second side is the side of the collecting tray away from the collection area.

14. The data center phase change liquid cooling architecture of claim 13, wherein, The baffle forming the collection area further comprises a third baffle, and the third baffle is fixedly connected with the same side plate end of the first baffle and the second baffle.

15. The central phase change liquid cooling architecture of any one of claims 1 to 14, wherein, The projection area of the condensing unit on the floor of the machine room is greater than the projection area of the cabinet on the floor of the machine room.

16. The data center phase change liquid cooling architecture of any of claims 1-15, wherein, A flow valve is arranged between the liquid return pipe and the liquid inlet of the node.

17. The data center phase change liquid cooling architecture of any of claims 1-16, wherein, A working medium pump is arranged on the liquid return channel between the collecting tray and the liquid return pipe.

18. The data center phase change liquid cooling architecture of any of claims 1-17, wherein, The machine room further comprises a buffer cavity separated from the equipment cavity, an inner door is arranged on the partition wall between the equipment cavity and the buffer cavity, and an outer door is arranged on the outer wall of the buffer cavity.

19. The data center phase change liquid cooling architecture of claim 18, wherein, The equipment cavity comprises a normally closed exhaust port.

20. The data center phase change liquid cooling architecture of claim 19, wherein, A safety valve is arranged at the exhaust port.

21. A machine room for housing a rack, characterized by The machine room comprises a sealed equipment cavity and a fixedly arranged condensing unit, a water supply pipe and a water return pipe; The condensing unit comprises a condensing pipe and a collecting tray, the water inlet of the condensing pipe is communicated with the water supply pipe, the water outlet of the condensing pipe is communicated with the water return pipe, the collecting tray is located below the condensing pipe, and the projections of the condensing pipe and the collecting tray on the floor of the machine room at least partially overlap, and a liquid outlet interface is arranged on the collecting tray; The condensing unit is located above a cabinet arranged in the equipment cavity, and the liquid outlet interface of the collecting tray is used to dock with a liquid return interface on the side of the cabinet to form a liquid return channel.

22. The machine room of claim 21, wherein, The projection of the condensing pipe on the floor of the machine room overlaps the projection of the collecting tray on the floor of the machine room, or the projection of the condensing pipe on the floor of the machine room is located within the projection of the collecting tray on the floor of the machine room.

23. The machine room according to claim 21 or 22, characterized in that The condensing pipe is arranged obliquely, and the lower end of the condensing pipe is located within the projection of the collecting tray on the floor of the machine room.

24. The machine room according to any one of claims 21 to 23, wherein, The condensing unit further comprises a water supply connecting pipe and a water return connecting pipe; the water inlet of the condensing pipe is communicated with the water supply connecting pipe, the water supply connecting pipe is communicated with the water supply pipe; the water outlet of the condensing pipe is communicated with the water return connecting pipe, and the water return connecting pipe is communicated with the water return pipe; a plurality of condensing pipes are arranged in parallel between the water supply connecting pipe and the water return connecting pipe, and the plurality of condensing pipes form a condensing pipe group.

25. The machine room of claim 24, wherein, The number of the condensing pipe groups is multiple, the number of the water supply connecting pipes and the number of the water return connecting pipes are both multiple, and the water supply connecting pipes and the water return connecting pipes are arranged one by one corresponding to the condensing pipe groups.

26. The machine room according to any one of claims 21 to 25, wherein, The condensing unit further comprises a liquid outlet pipe fixed on the liquid collecting disc and communicating with the liquid containing part of the liquid collecting disc; the liquid return pipe and the liquid outlet pipe are arranged in the vertical direction, the outer pipe end of the liquid outlet pipe extending downward forms the liquid outlet interface, and the outer pipe end of the liquid return pipe extending upward forms the liquid return interface.

27. The machine room according to any one of claims 21 to 26, wherein, The machine room is provided with an operation and maintenance robot.

Images