CDU capable of being maintained on line and cabinet

Abstract

The utility model relates to a CDU capable of being maintained on line and a cabinet, and belongs to the technical field of server cooling, the CDU comprises a multi-pump driving assembly and a self-sealing connecting assembly, the multi-pump driving assembly is connected with a heat exchange assembly, the heat exchange assembly is connected with a first return pipe, the first return pipe is connected with a main pipeline and a standby pipeline, and the main pipeline is connected with a second return pipe; the liquid discharging ends of the main pipeline and the standby pipeline are jointly connected with a second backflow pipe, a filter is arranged on the main pipeline, the main pipeline and the standby pipeline are jointly connected with a switching assembly, and the switching assembly is used for enabling switching liquid to flow to the main pipeline / the standby pipeline; the self-sealing connecting assembly is used for being connected to a pipeline, the detection assembly is installed on the self-sealing connecting assembly, and before the detection assembly and the self-sealing connecting assembly are disconnected, the self-sealing connecting assembly can isolate liquid from the detection assembly. The method has the advantages that necessary equipment maintenance and replacement are carried out under the condition that the CDU is not shut down, and the reliability and maintenance convenience of the system are improved.

Description

Technical Field

[0001] This application relates to the field of server cooling technology, and in particular to a CDU and cabinet that can be maintained online. Background Technology

[0002] As the number and computing power of data center servers continue to increase, the heat generated by servers under high-density integration is gradually increasing, leading to rising server temperatures. To ensure stable server operation, the design and reliability of the cooling system become particularly important. Traditional server cooling methods include air cooling and liquid cooling, with liquid cooling technology becoming increasingly widely used due to its high heat dissipation capabilities. Liquid cooling technology typically achieves heat exchange through the circulation of coolant inside and outside the server, thereby maintaining the server temperature within a normal range.

[0003] Currently, the key equipment in a liquid cooling system is the CDU (coolant distribution unit). The CDU is used to control the circulation, heat exchange, and recirculation of the coolant, and to ensure that the coolant can be delivered evenly and stably to all parts of the server.

[0004] When performing equipment maintenance or component replacement on existing CDUs, it is usually necessary to stop the circulation of coolant and may also be necessary to drain the coolant from the pipes. This not only causes maintenance inconvenience but also affects the normal operation of the server. For some critical work scenarios, long-term downtime maintenance is unacceptable. Utility Model Content

[0005] In order to enable necessary equipment maintenance and replacement without shutting down the CDU, thereby improving system reliability and ease of maintenance, this application provides an online maintainable CDU and cabinet.

[0006] The online maintainable CDU provided in this application adopts the following technical solution:

[0007] An online maintainable CDU includes a multi-pump drive assembly and a self-sealing connection assembly. The multi-pump drive assembly is connected to a heat exchange assembly, which is connected to a first return pipe. The first return pipe is connected to a main pipe and a backup pipe. The drain ends of the main pipe and the backup pipe are connected to a second return pipe. A filter is installed on the main pipe. The main pipe and the backup pipe are connected to a switching assembly, which is used to direct the switching fluid to the main pipe / the backup pipe.

[0008] The self-sealing connection assembly is used to connect to the pipeline. A detection component is installed on the self-sealing connection assembly. The detection component detects the parameters of the liquid through the self-sealing connection assembly. Before the detection component is disconnected from the self-sealing connection assembly, the self-sealing connection assembly can isolate the liquid from the detection component.

[0009] By adopting the above technical solution, the multi-pump drive component can transport the coolant in the server to the heat exchange component for heat exchange and cooling. Then, the coolant is discharged through the first return pipe and filtered for impurities through the main pipe before flowing back into the server for cooling. During the heat exchange process, the detection component can also detect multiple parameters of the coolant, such as the temperature of the coolant after heat exchange and the hydraulic pressure of the coolant.

[0010] The multi-pump drive assembly features a redundant design with multiple drive sources to drive coolant return. If one drive source fails or is damaged and needs replacement, the remaining drive sources can continue operating. When the filter needs periodic replacement, the switching component controls the coolant flow direction, directing it through the backup pipe instead of the main pipe, thus ensuring continued coolant delivery even when the filter is being replaced. Furthermore, during normal testing, the detection component can monitor relevant coolant parameters via a self-sealing connection. When the detection component needs to be removed for maintenance or replacement, the self-sealing connection isolates the coolant from the detection component, allowing for continued coolant delivery even when the detection component is being replaced.

[0011] Therefore, the entire system enables online maintenance of key components (such as pumps, filters, and detection components) while ensuring normal coolant flow for stable server heat dissipation. This avoids frequent cooling system downtime, reduces operational interruptions due to malfunctions or maintenance, and improves system reliability and maintainability.

[0012] Optionally, the multi-pump drive assembly includes at least two pump bodies, the inlet ends of all the pump bodies are connected to a first diverter pipe, a first valve body is provided at the connection between the pump body and the first diverter pipe, the outlet ends of all the pump bodies are connected to a second diverter pipe, and a second valve body is provided at the connection between the pump body and the second diverter pipe.

[0013] By adopting the above technical solution, during normal operation, only one pump body can be started for coolant circulation, or multiple pump bodies can be started for coolant circulation. When it is necessary to replace any of the pump bodies, simply close the first and second valve bodies corresponding to the pump body to be replaced, and the pump body can be removed and replaced. Other pump bodies can still be used normally, so that the coolant can continue to perform liquid cooling circulation.

[0014] Optionally, the switching component includes a third valve body, which is provided at the connection between the main pipe and the first return pipe, the connection between the main pipe and the second return pipe, and the connection between the spare pipe and the second return pipe.

[0015] By adopting the above technical solution, during normal operation, the third valve body at the connection between the backup pipe and the second return pipe is closed. After the coolant is cooled by the heat exchange components, it passes through the first return pipe, the main pipe and the second return pipe in sequence. The filter at the main pipe filters the coolant.

[0016] When the filter needs to be replaced, simply close the third valve body at the connection between the main pipe and the first return pipe, and the third valve body at the connection between the main pipe and the second return pipe, and open the third valve body at the connection between the spare pipe and the second return pipe. The main pipe and the filter can then be disassembled for replacement, while the coolant will circulate normally through the first return pipe, the spare pipe, and the second return pipe.

[0017] Optionally, the self-sealing connection assembly includes a first detection tube and a second detection tube. One end of the first detection tube is connected to the pipeline, and the other end of the first detection tube is connected to a ball valve. The second detection tube is disposed on the pipeline and is separated from the pipeline.

[0018] The detection assembly includes a hydraulic sensor and a temperature sensor. The hydraulic sensor is connected to the ball valve, and the temperature sensor is connected to the second detection tube.

[0019] By adopting the above technical solution, the ball valve is in the open state during normal operation, and the coolant acts on the hydraulic sensor, which can detect the hydraulic pressure of the coolant in real time, ensuring that the liquid cooling system operates within an appropriate pressure range.

[0020] The temperature sensor monitors the temperature through a second sensing tube. Although the temperature sensor is not in direct contact with the coolant, the temperature difference between the two is minimal due to heat conduction between the second sensing tube and the coolant. This design may introduce a certain temperature error, but in server cooling systems, this error will not affect the normal operation of the system. Therefore, the temperature of the second sensing tube detected by the temperature sensor can effectively reflect whether the coolant temperature is within a reasonable range, thereby determining whether the cooling effect is normal.

[0021] When it is necessary to replace the hydraulic sensor, the hydraulic sensor can be directly removed by closing the ball valve. The temperature sensor can be directly removed from the second detection tube without affecting the flow of coolant or the normal operation of the system, and the sensor can be replaced online.

[0022] Optionally, the heat exchange assembly includes a heat exchanger, the multi-pump drive assembly is connected to the heat exchanger, the heat exchanger is connected to an inlet pipe, and the heat exchanger is also connected to two first return pipes, one of which is connected to the multi-pump drive assembly to form a coolant passage, and the other of which is connected to the inlet pipe to form a cooling water passage.

[0023] By adopting the above technical solution, the inlet pipe is connected to an external chiller. The cooling water passes through the inlet pipe, heat exchanger, another first return pipe, another main pipe and another second return pipe in sequence. The coolant is transported to the heat exchanger by a multi-pump drive assembly. In the heat exchanger, the coolant and cooling water exchange heat to achieve the cooling of the coolant.

[0024] Optionally, the multi-pump drive assembly, the inlet pipe, and the two first return pipes are all connected to the bottom of the heat exchanger, the multi-pump drive assembly and the inlet pipe are located at one end of the heat exchanger, and the two first return pipes are located at the other end of the heat exchanger.

[0025] The first return pipe, the main pipe, and the second return pipe are connected in sequence along the vertical direction. The spare pipe is U-shaped and is oriented toward the multi-pump drive assembly.

[0026] By adopting the above technical solutions, the entire pipeline layout becomes more compact, reducing pipe bends and complex connection routes. Moreover, the simplified route design makes it easier for maintenance personnel to access key components, thereby making maintenance and replacement work simpler.

[0027] The cabinet provided in this application adopts the following technical solution:

[0028] A cabinet for installing and accommodating the aforementioned online maintainable CDU includes a mounting frame, wherein a plurality of first sealing plates are detachably connected to both sides of the mounting frame along its width direction, the plurality of first sealing plates collectively enclosing both sides of the mounting frame, a second sealing plate is detachably connected to the front end of the mounting frame, and a third sealing plate is detachably connected to the rear end of the mounting frame.

[0029] By adopting the above technical solution, the different components of the CDU are located in different positions on the mounting frame, and the detachable design of the cabinet's four sides allows operators to access each component from different directions. Whether a component needs maintenance or replacement, whether it is at the front, sides, or rear, operators can access the cabinet interior by removing the corresponding panel. This all-around disassembly design greatly improves the convenience of maintenance and avoids the inconvenience or space constraints caused by a single access channel.

[0030] The first sealing plate is designed as several pieces, each of which is lightweight and easier to disassemble. Compared to a single-piece sealing plate design, this segmented design not only reduces the weight of the sealing plate, but also allows for easy disassembly and installation by operators during maintenance, as only the first sealing plate corresponding to the part that needs to be replaced needs to be removed.

[0031] Optionally, the mounting frame is equipped with several sets of folding plates. Each set of folding plates is arranged opposite to the top of a first sealing plate and the bottom of an adjacent first sealing plate. The top of the first sealing plate is provided with a mounting seat, and an elastic snap-fit ​​block is installed in the mounting seat. The bottom of the first sealing plate is connected to a support plate.

[0032] When the first sealing plate is installed on the mounting frame, the folding plate directly opposite the top of the first sealing plate is located between and abuts against the elastic snap block and the first top sealing plate, and the folding plate directly opposite the bottom of the first sealing plate supports the support plate.

[0033] By adopting the above technical solution, when installing the first sealing plate, it is only necessary to press down the elastic snap-fit ​​block so that the elastic snap-fit ​​block extends into the mounting base, then attach the first sealing plate to the folded plate, and then release the elastic snap-fit ​​block so that the elastic snap-fit ​​block extends out of the mounting base and attaches to the side of the folded plate away from the first sealing plate, thus completing the connection between the top of the first sealing plate and the mounting frame. At the same time, the bottom support plate of the first sealing plate is supported on another set of folded plates, thereby completing the installation of the first sealing plate.

[0034] The installation of the first panel can be easily completed without additional tools or complicated operations. The entire installation process is simple and quick, greatly improving operational efficiency and facilitating daily maintenance and component replacement. Furthermore, except for the topmost folding plate of the mounting frame, the other folding plates can simultaneously serve as the top connection and bottom support for two adjacent first panels. The small number of folding plates provides both support and connection, simplifying the structure of the mounting frame and significantly reducing the overall weight of the cabinet.

[0035] Optionally, a control box is installed inside the mounting frame. The control box is located at the front end of the mounting frame, and the opening of the control box faces the front end of the mounting frame. The second sealing plate is hinged to the mounting frame and closes the front end of the mounting frame and the opening of the control box. A display screen is provided on the second sealing plate, and a first heat dissipation hole is provided on the part of the second sealing plate facing the multi-pump drive assembly.

[0036] By adopting the above technical solution, the control box opening is sealed by the second sealing plate. When it is necessary to inspect or adjust the internal components of the control box, it is only necessary to simply open the second sealing plate, which is hinged to the mounting frame. The display screen is integrated on the second sealing plate, allowing users to view the system status, temperature, hydraulic pressure, and other operating parameters in real time without disassembling the cabinet, further facilitating monitoring and operation. The first heat dissipation hole ensures that the heat generated by the multi-pump drive components during operation can be dissipated in a timely manner, reducing the possibility of overheating inside the cabinet.

[0037] Optionally, a fourth sealing plate is installed on the top of the mounting frame, the fourth sealing plate has a second heat dissipation hole and a wiring port, and a fifth sealing plate is detachably connected to the rear end of the mounting frame. The third sealing plate and the fifth sealing plate together close the rear end face of the mounting frame, and the fifth sealing plate has a pipe port.

[0038] By adopting the above technical solution, the second heat dissipation hole opened on the fourth sealing plate further enhances the overall heat dissipation performance of the cabinet.

[0039] In summary, this application includes at least one of the following beneficial technical effects:

[0040] 1. While ensuring normal coolant flow for stable server heat dissipation, online maintenance of key components (such as pumps, filters, and detection components) was achieved. This avoided frequent cooling system downtime, reduced operational interruptions due to malfunctions or maintenance, and improved system reliability and maintainability.

[0041] 2. The overall pipeline layout is more compact, reducing pipe bends and complex connection routes. Moreover, the simplified route design makes it easier for maintenance personnel to access key components, thus making maintenance and replacement work simpler.

[0042] 3. Because the different components of the CDU are located in different positions on the mounting frame, the removable design of the rack on all four sides allows operators to access each component from different directions. Whether a component needs maintenance or replacement, whether it is at the front, sides, or rear, operators can access the inside of the rack by removing the corresponding panel. This all-around disassembly design greatly improves the convenience of maintenance and avoids the inconvenience or space constraints caused by a single access channel.

[0043] 4. The first sealing plate is designed in several pieces, each of which is lightweight and easier to disassemble. Compared with a single-piece sealing plate design, this segmented design not only reduces the weight of the sealing plate, but also allows for easy disassembly and installation by operators during maintenance, as only the first sealing plate corresponding to the part that needs to be replaced needs to be removed. Attached Figure Description

[0044] Figure 1This is a schematic diagram of the overall structure of an embodiment of this application.

[0045] Figure 2 This is a schematic diagram illustrating the structure of the detection component and the self-sealing connection component in an embodiment of this application.

[0046] Figure 3 This is a structural schematic diagram illustrating the mounting frame in an embodiment of this application.

[0047] Figure 4 This is a schematic diagram illustrating the structure of the first sealing plate, the second sealing plate, and the fourth sealing plate in an embodiment of this application.

[0048] Figure 5 This is a schematic diagram illustrating the structure of the third and fifth sealing plates in an embodiment of this application.

[0049] Figure 6 yes Figure 5 An enlarged schematic diagram of part A in the middle.

[0050] Figure 7 This is a schematic diagram illustrating the structure of the mounting base and the elastic snap-fit ​​block in an embodiment of this application.

[0051] Explanation of reference numerals in the attached drawings: 1. Multi-pump drive assembly; 11. Pump body; 12. First branch pipe; 13. First valve body; 14. Second branch pipe; 15. Second valve body; 3. Heat exchange assembly; 31. Heat exchanger; 32. Inlet pipe; 41. First return pipe; 42. Main pipe; 43. Backup pipe; 44. Second return pipe; 45. Filter; 5. Switching assembly; 51. Third valve body; 6. Self-sealing connection assembly; 61. First detection pipe; 62. Second detection pipe; 63. Ball valve; 7. Detection assembly; 71. Hydraulic sensor; 72. Temperature sensor; 8. Mounting frame; 81. First sealing plate; 82. Folding plate; 83. Mounting base; 84. Flexible snap-fit ​​block; 86. Support plate; 87. Control box; 88. Second sealing plate; 881. Display screen; 882. First heat dissipation hole; 89. Fourth sealing plate; 891. Second heat dissipation hole; 892. Wiring port; 810. Third sealing plate; 811. Fifth sealing plate; 8111. Connecting pipe. Detailed Implementation

[0052] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0053] This application discloses an online maintainable CDU.

[0054] like Figure 1The online maintainable CDU includes a multi-pump drive assembly 1, a self-sealing connection assembly 6, and a heat exchange assembly 3. The multi-pump drive assembly 1 is connected to the heat exchange assembly 3. The heat exchange assembly 3 is connected to a first return pipe 41. The first return pipe 41 is connected to a main pipe 42 and a backup pipe 43. The drain ends of the main pipe 42 and the backup pipe 43 are connected to a second return pipe 44. A filter 45 is installed on the main pipe 42. The main pipe 42 and the backup pipe 43 are connected to a switching assembly 5. The switching assembly 5 is used to switch the liquid flow to the main pipe 42 / backup pipe 43.

[0055] The self-sealing connection assembly 6 is used to connect to the pipeline. A detection assembly 7 is installed on the self-sealing connection assembly 6. The detection assembly 7 detects the parameters of the liquid through the self-sealing connection assembly 6. Before the detection assembly 7 is disconnected from the self-sealing connection assembly 6, the self-sealing connection assembly 6 can isolate the liquid from the detection assembly 7.

[0056] In this embodiment, the heat exchange assembly 3 includes a heat exchanger 31 located above the multi-pump drive assembly 1. One bottom end of the heat exchanger 31 is connected to the multi-pump drive assembly 1. The bottom of the heat exchanger 31 is also connected to an inlet pipe 32, which is located at the same end as the multi-pump drive assembly 1. The inlet pipe 32 is vertically arranged, and an electric regulating valve (not shown in the figure) is installed on the inlet pipe 32. The electric regulating valve can adjust the flow rate of the cooling water according to the cooling status of the coolant to ensure that the coolant can be reduced to a suitable temperature.

[0057] Two sets of first return pipes 41 are connected to the bottom of the heat exchanger 31 at the end away from the multi-pump drive assembly 1. Each set of first return pipes 41 is connected to a main pipe 42 and a spare pipe 43. One set of first return pipes 41, main pipe 42, spare pipe 43 and second return pipe 44 is used as a pipeline for transporting coolant, and the other set of first return pipes 41, main pipe 42, spare pipe 43 and second return pipe 44 is used as a pipeline for transporting cooling water.

[0058] The first return pipe 41, the main pipe 42, and the second return pipe 44 are connected in sequence along the vertical direction. The spare pipe 43 is U-shaped and is set towards the multi-pump drive assembly 1.

[0059] In this embodiment, the self-sealing connection assembly 6 is installed in the second return pipe 44 for conveying coolant, and the detection assembly 7 is connected to the self-sealing connection assembly 6 to detect the liquid pressure and temperature of the coolant after cooling is completed.

[0060] In other embodiments, the self-sealing connection assembly 6 may also be installed on the first return pipe 41 for conveying coolant, the first return pipe 41 for conveying cooling water, the second return pipe 44 for conveying cooling water, etc.

[0061] In other embodiments, the heat exchange component 3 can also be an air-cooled heat exchanger, that is, the multi-pump drive component 1 is connected to the air-cooled heat exchanger, and the air-cooled heat exchanger is connected to a set of first return pipe 41, main pipe 42, backup pipe 43 and second return pipe. After the heat of the coolant is carried away by the air, the coolant is discharged into the server in sequence through the first return pipe 41, main pipe 42 / backup pipe 43 and second return pipe 44.

[0062] The multi-pump drive assembly 1 includes at least two pump bodies 11. In this embodiment, there are two pump bodies 11. The inlet ends of the two pump bodies 11 are connected to a first diverter pipe 12. A first valve body 13 is provided at the connection between the pump body 11 and the first diverter pipe 12. That is, the outlet of the first diverter pipe 12 is connected to the first valve body 13. The first valve body 13 is connected to the inlet end of the pump body 11. In this embodiment, the first valve body 13 is a manual butterfly valve.

[0063] The outlet ends of both pump bodies 11 are connected to a second diversion pipe 14. A second valve body 15 is provided at the connection between the pump body 11 and the second diversion pipe 14, that is, the outlet end of the pump body 11 is connected to the second valve body 15, and the second valve body 15 is connected to the inlet of the second diversion pipe 14. In this embodiment, the second valve body 15 is a one-way valve. The outlet end of the second diversion pipe 14 is connected to the bottom of the heat exchanger 31.

[0064] The switching component 5 includes a third valve body 51. A third valve body 51 is installed at the connection points of the main pipe 42 and the first return pipe 41, the main pipe 42 and the second return pipe 44, and the backup pipe 43 and the second return pipe 44. Specifically, the outlet end of the first return pipe 41 is connected to a third valve body 51, which is also connected to the inlet end of the main pipe 42. The outlet end of the main pipe 42 is connected to a third valve body 51, which is also connected to the inlet end of the second return pipe 44. The branch end of the first return pipe 41 is directly connected to the inlet end of the backup pipe 43, and the outlet end of the backup pipe 43 is connected to a third valve body 51, which is also connected to the branch end of the second return pipe 44.

[0065] like Figure 2 The self-sealing connection assembly 6 includes a first detection tube 61 and a second detection tube 62. One end of the first detection tube 61 is connected to the pipeline, and the other end of the first detection tube 61 is connected to a ball valve 63. The second detection tube 62 is disposed on the pipeline and is separated from the pipeline.

[0066] In this embodiment, the first detection tube 61 is connected to the second return pipe 44 for conveying coolant, and the second detection tube 62 is connected to the second return pipe 44 for conveying coolant but always remains separate. In other embodiments, the first detection tube 61 and the second detection tube 62 can be installed on other pipelines that require parameter detection. In other embodiments, only the first detection tube 61 may be used.

[0067] The detection assembly 7 includes a hydraulic sensor 71 and a temperature sensor 72. The hydraulic sensor 71 is threadedly and sealed to the ball valve 63, and the temperature sensor 72 is threadedly and sealed to the second detection tube 62. In other embodiments, the temperature sensor 72 may also be threadedly and sealed to the ball valve 63.

[0068] The implementation principle of CDU in this embodiment is as follows: the coolant in the server flows sequentially through the first branch pipe 12, pump body 11, second branch pipe 14 and heat exchanger 31. The coolant is cooled when it flows through the heat exchanger 31. Then it flows sequentially through a set of first return pipe 41, main pipe 42 / backup pipe 43 and second return pipe 44, and finally returns to the server.

[0069] The inlet pipe 32 is connected to an external chiller. Cooling water flows through the inlet pipe 32 and the heat exchanger 31 in sequence. The cooling water exchanges heat with the coolant flowing through the heat exchanger 31. Then it flows through another set of first return pipe 41, main pipe 42 / standby pipe 43, and second return pipe 44 in sequence, and finally returns to the chiller.

[0070] When it is necessary to replace one of the pump bodies 11, simply close the first valve body 13 and the second valve body 15 corresponding to the pump body 11 to be replaced, and the pump body 11 can be removed and replaced. The other pump bodies 11 can still be used normally, so that the coolant can continue to perform liquid cooling circulation.

[0071] When the filter 45 needs to be replaced, simply close the third valve body 51 at the connection between the main pipe 42 and the first return pipe 41, and the third valve body 51 at the connection between the main pipe 42 and the second return pipe 44, and open the third valve body 51 at the connection between the spare pipe 43 and the second return pipe 44. The main pipe and the filter 45 can then be disassembled and replaced. The coolant will then pass through the first return pipe 41, the spare pipe 43, and the second return pipe 44 in sequence to perform normal liquid cooling circulation.

[0072] When it is necessary to replace the hydraulic sensor 71, the hydraulic sensor 71 can be directly removed by closing the ball valve 63. The temperature sensor 72 can be directly removed from the second detection tube 62 without affecting the flow of coolant and the normal operation of the system, and the sensors can be replaced online.

[0073] Therefore, while ensuring the normal flow of coolant for stable server heat dissipation, the entire system enables online maintenance of key components (such as pumps, filters 45, and sensors). This avoids frequent shutdowns of the cooling system, reduces operational interruptions due to malfunctions or maintenance, and improves system reliability and maintainability.

[0074] This application also discloses a cabinet.

[0075] like Figure 3 and Figure 4 A cabinet for installing and accommodating the aforementioned online maintainable CDU includes a mounting frame 8. The mounting frame 8 has several first sealing plates 81 detachably connected to both sides along its width direction. In the embodiment of this application, three first sealing plates 81 are respectively installed on the left and right sides of the mounting frame 8, and the three first sealing plates 81 together enclose the side of the mounting frame 8.

[0076] like Figure 5 , Figure 6 and Figure 7 The mounting frame 8 has three sets of L-shaped folding plates 82, which bend towards the center of the mounting frame 8. Each set contains two folding plates 82, and the three sets are equidistant along the height of the mounting frame 8. The two lower sets of folding plates 82 are positioned opposite the top of a first sealing plate 81 and the bottom of an adjacent first sealing plate 81. A mounting base 83 is located at the top of the first sealing plate 81, and an elastic locking block 84 is installed within the mounting base 83. The elastic locking block 84 consists of a locking block and a spring. The locking block slides within the mounting base 83, and the spring is installed within the mounting base 83. When the spring is in its natural state, the locking block extends from the top of the mounting base 83, with one end protruding onto the surface of the mounting base 83 for the operator to press. A support plate 86, which is a downwardly bent L-shaped plate, is connected to the bottom of the first sealing plate 81.

[0077] When the first sealing plate 81 is installed on the mounting frame 8, the folding plate 82 facing the top of the first sealing plate 81 is located between the elastic snap block 84 and the first sealing plate 81 and abuts against it. The folding plate 82 facing the bottom of the first sealing plate 81 supports the support plate 86. The support plate 86 is fastened on the folding plate 82. At the same time, the support plate 86 covers the gap between adjacent first sealing plates 81, thus sealing the side of the mounting frame 8.

[0078] like Figure 3 , Figure 4 and Figure 5A control box 87 is installed inside the mounting frame 8. The control box 87 is located at the front end of the mounting frame 8, and the opening of the control box 87 faces the front end of the mounting frame 8. A second sealing plate 88 is hinged to the front end of the mounting frame 8. The second sealing plate 88 closes the front end of the mounting frame 8 and the opening of the control box 87. A display screen 881 is provided on the upper part of the second sealing plate 88. A first heat dissipation hole 882 is provided at the bottom of the second sealing plate 88. The pump body 11 is installed at the bottom of the mounting frame 8 and is located near the front end of the mounting frame 8.

[0079] The top of the mounting frame 8 is bolted with a fourth sealing plate 89. The fourth sealing plate 89 has a second heat dissipation hole 891 and a wiring port 892. The rear end of the mounting frame 8 is bolted with a third sealing plate 810 and a fifth sealing plate 811. The third sealing plate 810 and the fifth sealing plate 811 together seal the rear end of the mounting frame 8. The fifth sealing plate 811 is located below the third sealing plate 810 and has a connecting pipe port 8111.

[0080] The first return pipe 41, the second return pipe 44, and the main pipe 42 / backup pipe 43 are located near the rear end of the mounting frame 8. The external ends of the second return pipe 44, the inlet pipe 32, and the first branch pipe 12 are all positioned towards the fifth sealing plate 811.

[0081] The implementation principle of the cabinet in this embodiment is as follows: Since the different components of the CDU are located at different positions on the mounting frame 8, the detachable design of the cabinet's four sides allows operators to access each component from different directions. Whether the components at the front, sides, or rear need maintenance or replacement, operators can remove the corresponding panels and operate inside the cabinet. This all-around disassembly design greatly improves the convenience of maintenance and avoids the inconvenience or space constraints caused by a single access channel.

[0082] The first sealing plate 81 is designed as several pieces, each of which is lightweight and easier to disassemble. Compared with the single-piece sealing plate design, this segmented design not only reduces the weight of the sealing plate, but also allows for easy disassembly and installation by operators during maintenance, as only the first sealing plate 81 corresponding to the part that needs to be replaced needs to be removed.

[0083] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An on-line maintainable CDU characterized by: The application relates to a multi-pump driving assembly (1) and a self-sealing connecting assembly (6), the multi-pump driving assembly (1) is connected with a heat exchange assembly (3), the heat exchange assembly (3) is connected with a first return pipe (41), the first return pipe (41) is connected with a main pipeline (42) and a standby pipeline (43), the liquid discharge ends of the main pipeline (42) and the standby pipeline (43) are jointly connected with a second return pipe (44), a filter (45) is arranged on the main pipeline (42), and the main pipeline (42) and the standby pipeline (43) are jointly connected with a switching assembly (5) for switching the liquid flow direction of the main pipeline (42) / the standby pipeline (43). The self-sealing connecting assembly (6) is used for being connected with a pipeline, a detection assembly (7) is arranged on the self-sealing connecting assembly (6), the detection assembly (7) detects the parameters of liquid through the self-sealing connecting assembly (6), and the self-sealing connecting assembly (6) can isolate the liquid from the detection assembly (7) before the detection assembly (7) is disconnected from the self-sealing connecting assembly (6).

2. The on-line maintainable CDU of claim 1, wherein: The multi-pump driving assembly (1) comprises at least two pump bodies (11), the liquid inlet ends of all the pump bodies (11) are jointly connected with a first branch pipe (12), first valve bodies (13) are arranged at the connecting positions of the pump bodies (11) and the first branch pipe (12), and the liquid outlet ends of all the pump bodies (11) are jointly connected with a second branch pipe (14).

3. The on-line maintainable CDU of claim 1, wherein: The switching assembly (5) comprises third valve bodies (51), and the connecting positions of the main pipeline (42) and the first return pipe (41), the connecting positions of the main pipeline (42) and the second return pipe (44) and the connecting positions of the standby pipeline (43) and the second return pipe (44) are all provided with the third valve bodies (51).

4. The on-line maintainable CDU of claim 1, wherein: The self-sealing connecting assembly (6) comprises a first detection pipe (61) and a second detection pipe (62), one end of the first detection pipe (61) is communicated with a pipeline, the other end of the first detection pipe (61) is connected with a ball valve (63), the second detection pipe (62) is arranged on the pipeline, and the second detection pipe (62) is separated from the pipeline. The detection assembly (7) comprises a hydraulic sensor (71) and a temperature sensor (72), the hydraulic sensor (71) is connected with the ball valve (63), and the temperature sensor (72) is connected with the second detection pipe (62).

5. The on-line maintainable CDU of claim 1, wherein: The heat exchange assembly (3) comprises a heat exchanger (31), the multi-pump driving assembly (1) is connected with the heat exchanger (31), the heat exchanger (31) is connected with a liquid inlet pipe (32), the heat exchanger (31) is also connected with two first return pipes (41), one first return pipe (41) is communicated with the multi-pump driving assembly (1) to form a cooling liquid passage, and the other first return pipe (41) is communicated with the liquid inlet pipe (32) to form a cooling water passage.

6. The on-line maintainable CDU of claim 5, wherein: The multi-pump driving assembly (1), the liquid inlet pipe (32) and the two first return pipes (41) are connected at the bottom of the heat exchanger (31), the multi-pump driving assembly (1) and the liquid inlet pipe (32) are arranged at one end of the heat exchanger (31), and the two first return pipes (41) are arranged at the other end of the heat exchanger (31). The first return pipe (41), the main pipe (42) and the second return pipe (44) are sequentially connected along the vertical direction, the standby pipe (43) is U-shaped, and the standby pipe (43) is arranged towards the multi-pump driving assembly (1).

7. A cabinet characterized by: The mounting frame (8) is detachably connected with a plurality of first sealing plates (81) on both sides along the width direction of the mounting frame (8), the first sealing plates (81) jointly seal the two side surfaces of the mounting frame (8), a second sealing plate (88) is detachably connected to the front end of the mounting frame (8), and a third sealing plate (810) is detachably connected to the rear end of the mounting frame (8).

8. A cabinet according to claim 7, characterised in that: A plurality of groups of folding plates (82) are mounted on the mounting frame (8), each group of folding plates (82) is arranged opposite to the top of the first sealing plate (81) and the bottom of the adjacent first sealing plate (81), the top of the first sealing plate (81) is provided with a mounting seat (83), the mounting seat (83) is provided with an elastic clamping block (84), and the bottom of the first sealing plate (81) is connected with a supporting plate (86). When the first sealing plate (81) is mounted on the mounting frame (8), the folding plate (82) opposite to the top of the first sealing plate (81) is located between the elastic clamping block (84) and the first sealing plate (81) and abuts against the first sealing plate (81), and the folding plate (82) opposite to the bottom of the first sealing plate (81) supports the supporting plate (86).

9. A cabinet according to claim 7, characterized in that: A control box (87) is mounted in the mounting frame (8), the control box (87) is located at the front end of the mounting frame (8), the opening of the control box (87) is arranged towards the front end of the mounting frame (8), the second sealing plate (88) is hinged to the mounting frame (8), the second sealing plate (88) seals the front end surface of the mounting frame (8) and the opening of the control box (87), a display screen (881) is arranged on the second sealing plate (88), and a first heat dissipation hole (882) is arranged on the second sealing plate (88) opposite to the multi-pump driving assembly (1).

10. A cabinet according to claim 7, characterized in that: A fourth sealing plate (89) is mounted on the top of the mounting frame (8), the fourth sealing plate (89) is provided with a second heat dissipation hole (891) and a wiring port (892), a fifth sealing plate (811) is detachably connected to the rear end of the mounting frame (8), the third sealing plate (810) and the fifth sealing plate (811) jointly seal the rear end surface of the mounting frame (8), and the fifth sealing plate (811) is provided with a pipe connecting port (8111).

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