An in-situ repairable subsea data center and docking method

Abstract

The application discloses a seabed data center capable of being overhauled in situ and a docking method, and belongs to the technical field of seabed data centers. The seabed data center comprises an overhaul cabin and a data center body. The overhaul cabin and the data center cabin are connected through a standard sealing docking interface of a sealing door and a docking mechanical arm structure. The lower part of the overhaul cabin is provided with a floor. The floor and the inner wall of the overhaul cabin form a closed ballast cavity. An inert gas generating module and a drainage pump are arranged in the ballast cavity. The outer surface of the cabin body of the overhaul cabin is integrated with an end face attitude adjusting power device and a side face attitude adjusting power device, which are used for underwater positioning and attitude adjustment. The data center body comprises a data center cabin and a data center base. The sealing door and the docking mechanical arm structure comprise an overhaul cabin sealing door and a data center cabin sealing door. The overhaul cabin is provided with the overhaul cabin sealing door and the docking mechanical arm. The application can provide efficient and safe non-interrupted operation and maintenance support for the seabed data center.

Description

Technical Field

[0001] This invention relates to the field of submarine data center technology, specifically to a submarine data center capable of in-situ maintenance and its docking method. Background Technology

[0002] Submarine data centers utilize a technology that places servers within pressure-resistant, sealed containers, relying on seawater flow for heat dissipation. However, with the rapid development of submarine data centers, their operation and maintenance technologies face significant challenges, including high pressure in the deep sea, corrosive environments, and high maintenance costs. Existing technologies suffer from the following core problems:

[0003] (1) The limitations of traditional hoisting and maintenance mode: Currently, the maintenance of seabed data centers mostly relies on overall hoisting and recovery or ship crane operation. This method not only requires interruption of business operations, but also has high hoisting equipment costs and significant risks in deep-sea operations. In particular, in deep-sea areas below 40 meters, frequent recovery can easily exacerbate the fatigue of the cabin structure and sealing failure.

[0004] (2) The underwater environment has stringent requirements for maintenance technology. Traditional manual diving maintenance is limited by the operating depth and safe time, making it difficult to meet the needs of deep-sea maintenance. Undersea robots are also difficult to complete the maintenance tasks of precision equipment.

[0005] (3) Seawater cooling systems have poor applicability and are only effective in cold and low-temperature sea areas. The seawater temperature in tropical and temperate sea areas is too high to provide sufficient cooling for the normal operation of data centers, and they still rely on high-energy-consuming air conditioners.

[0006] Although modular pressure chambers and multi-degree-of-freedom robotic arm technologies have emerged in recent years, the integrated challenge of "precise docking-pressure balance" has not yet been solved. Summary of the Invention

[0007] The technical objective of this invention is to address the above-mentioned shortcomings by providing an in-situ repairable subsea data center and a docking method, which can provide efficient, secure, and uninterrupted operation and maintenance support for subsea data centers.

[0008] The technical solution adopted by this invention to solve its technical problem is:

[0009] A subsea data center capable of in-situ maintenance includes a maintenance compartment and a data center body. The maintenance compartment and the data center compartment are docked through a standard sealed interface with a sealed door and a docking robotic arm structure.

[0010] The lower part of the maintenance compartment is equipped with a floor, which forms a sealed ballast cavity with the inner wall of the maintenance compartment. The ballast cavity contains an inert gas generating module and a drainage pump. The outer surface of the maintenance compartment integrates an end face attitude adjustment power device and a side attitude adjustment power device for underwater positioning and attitude adjustment.

[0011] The data center body includes a data center cabin and a data center base. The lower part of the data center cabin is equipped with an electrostatic floor, which divides the data center cabin into upper and lower cavities. The cavity above the electrostatic floor houses equipment including integrated energy storage cabinets, integrated power cabinets, server racks, heptafluoropropane fire extinguishers, air conditioners, etc. The electrostatic floor below the integrated energy storage cabinets, integrated power cabinets, server racks, air conditioners, etc. is equipped with return air vents. The cavity below the electrostatic floor is equipped with a seawater cooling and closed cold aisle system.

[0012] The sealing door and docking robotic arm structure includes a maintenance compartment sealing door and a data center compartment sealing door. The maintenance compartment is equipped with a maintenance compartment sealing door and a docking robotic arm. The maintenance compartment sealing door is circular, with temperature and humidity sensors and pressure sensors installed on its outer side. It is hinged to the inner wall of the maintenance compartment via a sealing door hinge. The docking robotic arm is installed at the front end of the maintenance compartment sealing door and includes a telescopic connecting rod and a conical guide head. Multiple locking devices are evenly distributed circumferentially on the conical guide head. The two ends of the telescopic connecting rod are connected to the conical guide head and the maintenance compartment sealing door, respectively, and the central axes of the three are collinear. The standard sealing interface of the data center compartment sealing door is provided with a groove that mates with the outer surface of the maintenance compartment sealing door and the docking robotic arm, as well as an annular locking groove for locking, to ensure that the maintenance compartment and the data center compartment can fit together tightly and be sealed.

[0013] This subsea data center can solve the systemic problems of traditional subsea data center maintenance models, such as high hoisting costs, high risk of business interruption, poor safety of deep-sea operations, and high energy consumption. Through innovative cabin structure and dynamic pressure balance mechanism, combined with seawater cooling and closed cold aisle system, a safe, efficient, sustainable, low-energy-consumption, in-situ maintenance-enabled subsea data center has been constructed. The seawater cooling and closed cold aisle system ensures stable operation of the data center with low PUE.

[0014] Furthermore, the front end of the maintenance compartment has a conical transition structure and is equipped with a standard sealing interface for the maintenance compartment. A drain outlet is arranged below the interface. The drain outlet passes through the sealing interface and communicates with the ballast cavity to form a seawater discharge channel.

[0015] The drain outlet is equipped with a three-stage filtration structure, including a coarse filter with gradually decreasing pore size, a vortex separator, and an electromagnetic check valve. The electromagnetic check valve automatically locks after docking is completed.

[0016] Furthermore, the edge of the maintenance compartment sealing door is provided with a chamfered sealing surface, the rotation angle of the maintenance compartment sealing door around the hinge is limited to 0°-110°, and in the closed state, the maintenance compartment sealing door and the inner wall of the maintenance compartment form a multi-mechanical sealing structure, including at least one O-ring and one metal hard seal.

[0017] Furthermore, the propulsion axis of the end face attitude adjustment power device coincides with the main axis of the maintenance compartment; multiple side attitude adjustment power devices are evenly distributed on the rear end of the side wall of the maintenance compartment on the same cross section, and the propulsion axis of the side attitude adjustment power device forms an angle of 50°-70° with the main axis of the maintenance compartment. The side attitude adjustment power device uses a vector thruster or a ducted propeller to achieve power propulsion.

[0018] Furthermore, the telescopic connecting rod is a rod-shaped structure, and its surface connected to the sealed door of the maintenance compartment has trapezoidal threads to achieve telescopic movement. Its maximum telescopic stroke is 1.2-1.5 times the diameter of the sealing mating surface, and the surface of the rod is covered with an anti-corrosion and wear-resistant coating.

[0019] The front end of the tapered guide head has a tapered structure and its surface is made of electrically controlled strong magnetic material. Its outer contour fits tightly with the surface of the internal groove of the data center compartment sealing door. Multiple locking devices are evenly distributed and fixed on the circumferential direction of the cylindrical outer surface of the rear end of the tapered guide head. Each locking device includes a triangular locking tongue and a bidirectional hydraulic drive mechanism. When the locking tongue is extended, it forms a contact interlock structure with the annular locking groove of the standard sealing interface of the data center compartment. When it is retracted, it is completely submerged inside the tapered guide head.

[0020] Furthermore, the lead of the trapezoidal thread of the telescopic connecting rod is 5-15mm, and the thread helix angle is less than 5°;

[0021] The cone angle of the tapered guide head is 30°-45°, and the magnetic induction intensity of the electromagnetic material on its surface can reach 0.8-1.5T when energized, and the residual magnetic field intensity is less than 0.01T after power is cut off.

[0022] Furthermore, the temperature and humidity sensor and the pressure sensor are arranged redundantly, including two sets of independent measurement units, and the sensor signal lines run along the inner cavity of the sealed door hinge to realize signal transmission under pressure sealing conditions.

[0023] Furthermore, the data center cabin is equipped with a seawater cooling and closed cold aisle system, including heat exchange coils and air conditioning.

[0024] A heat exchange coil is installed in the cavity under the electrostatic floor. Both ends of the heat exchange coil are connected to the seawater outside the data center cabin. The seawater in the heat exchange coil is circulated by a water pump.

[0025] The air conditioner's condenser is located outside the data center cabin and is cooled directly by seawater.

[0026] This invention also claims a docking method for an in-situ repairable subsea data center. This method utilizes the aforementioned in-situ repairable subsea data center to achieve in-situ repair of the subsea data center. The implementation process is as follows:

[0027] The underwater data center maintenance personnel enter the maintenance compartment from the shore through the sealed door. The sealed door of the maintenance compartment is then closed. At this time, the telescopic connecting rod is in the extended state. The drainage pump in the ballast cavity of the maintenance compartment is started to expel the air and pump in the ballast water, so that the maintenance compartment can be submerged to the target position on the seabed.

[0028] When the maintenance compartment reaches the vicinity of the standard sealed interface of the data center compartment, the docking attitude is changed in real time by manipulating the end face attitude adjustment power unit and the side attitude adjustment power unit. After the maintenance compartment is adjusted to the predetermined docking position, the surface of the conical guide head is energized to form a strong magnetic effect. At this time, the conical guide head attracts the data center compartment's sealed door. Under the pushing action of the end face attitude adjustment power unit, and guided by the conical guide head, the interface of the conical guide head and the data center compartment's sealed door are completely fitted. At this time, the locking device pops out and locks into the annular locking groove of the data center compartment's sealed door. Then, the telescopic connecting rod retracts, pulling the maintenance compartment through the conical guide head. The maintenance compartment moves towards the data center compartment until they are tightly fitted together. The sealing system then activates to seal the compartment. Once the seal is complete, seawater is drained from the cavity between the interfaces through the drain outlet. Simultaneously, air flows from the maintenance compartment into the cavity to balance the pressure. Temperature, humidity, and pressure are recorded by temperature and humidity sensors and pressure sensors. When the seawater has been drained and the temperature, humidity, and pressure have reached the predetermined conditions, the conical guide head is de-energized and demagnetized, the locking device is reset, and the telescopic connecting rod continues to retract, disengaging from the sealing door of the data center compartment. Maintenance personnel can then open the sealing door of the maintenance compartment from inside the maintenance compartment and enter the data center compartment to perform maintenance and repair work.

[0029] If maintenance personnel encounter danger inside the maintenance compartment, the high-pressure inert gas generator can quickly release high-pressure gas and discharge ballast seawater, causing the maintenance compartment to float rapidly and achieve the purpose of escaping danger.

[0030] Furthermore, the data center compartment cools the equipment through a closed cold aisle. Driven by the air conditioner, the hot air in the compartment enters the cavity through the return air vent of the electrostatic floor under the equipment. First, it exchanges heat with the cool seawater in the heat exchange coil to achieve pre-cooling treatment of the hot air. Then, it enters the air conditioning cavity through the return air vent under the air conditioner and exchanges heat with the evaporator to become low-temperature air. Finally, the low-temperature air is discharged from the top of the air conditioner and enters the equipment compartment to take away heat again. This cycle repeats continuously.

[0031] When the sea temperature in the area is low, the air conditioner can operate without starting the compressor, and only turn on the fan to provide power for air circulation, which can further save energy and also significantly enhance the applicability of the data center to sea areas at different latitudes.

[0032] Compared with existing technologies, the in-situ repairable subsea data center and docking method of the present invention have the following advantages:

[0033] 1. More energy-efficient: The enclosed cold aisle avoids the mixing of cold and hot air, and when combined with a seawater precooling system, it greatly reduces energy consumption and ensures stable operation of the data center with low PUE.

[0034] 2. Precision docking system: Through the coordinated control of the end face propulsion device and the circumferentially distributed attitude adjustment power device, combined with the magnetic positioning of the conical guide head, the accuracy of the docking position and angle is greatly improved.

[0035] 3. Non-disruptive operation and maintenance solution: The telescopic robotic arm locking device and standard interface interlock design allow the maintenance process to be carried out without interrupting the data center operation. Compared with traditional hoisting maintenance methods, it reduces business downtime by up to 96%, and significantly reduces the annual operation and maintenance cost including hoisting fees.

[0036] 4. Multiple safety protection system: It integrates real-time temperature, humidity / pressure monitoring and emergency gas rapid release dual safety mechanisms, which not only provide safety protection, but also buy time to escape in the high-pressure environment of the deep sea. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the maintenance compartment and the data center compartment after docking, as provided in an embodiment of the present invention.

[0038] Figure 2 This is a cross-sectional view of the overall structure of the maintenance compartment and the data center compartment when they are docked, as provided in an embodiment of the present invention.

[0039] Figure 3 This is a partial structural diagram showing the tight fit between the maintenance compartment sealing door and the data center compartment sealing door provided in an embodiment of the present invention.

[0040] Figure 4 This is a schematic diagram of the maintenance compartment sealing door structure provided in an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the appearance of the maintenance compartment and the data center compartment when they are docked, as provided in an embodiment of the present invention.

[0042] In the diagram: 1. Maintenance compartment; 11. Maintenance compartment bulkhead; 12. Maintenance compartment floor; 13. End face attitude adjustment power unit; 14. Side attitude adjustment power unit; 15. Drain outlet; 2. Sealed door and docking robotic arm; 21. Sealed door hinge; 22. Maintenance compartment sealed door; 23. Temperature and humidity sensor; 24. Pressure sensor; 25. Telescopic connecting rod; 26. Conical guide head; 27. Locking device; 3. Data center compartment sealed door; 31. Annular locking groove; 4. Data center body; 41. Data center compartment; 42. Data center base; 43. Static floor; 5. Integrated energy storage cabinet; 6. Integrated power cabinet; 7. Server rack; 8. Heptafluoropropane fire extinguisher; 9. Air conditioner; 10. Heat exchange coil. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] A subsea data center capable of in-situ maintenance includes a maintenance compartment 1 and a data center body 4. The maintenance compartment 1 and the data center body 41 are docked through a standard sealed interface with a sealed door and a docking robotic arm structure.

[0045] like Figure 1 and Figure 2 As shown, the lower part of the maintenance compartment 1 is provided with a maintenance compartment floor 12, which forms a closed ballast cavity with the maintenance compartment wall 11. The ballast cavity contains an inert gas generating module and a drainage pump. The outer surface of the maintenance compartment integrates an end face attitude adjustment power device 13 and a side attitude adjustment power device 14 for underwater positioning and attitude adjustment.

[0046] The data center body 4 includes a data center compartment 41 and a data center base 42. An electrostatic floor 43 is located in the lower part of the data center compartment 41, dividing it into upper and lower cavities. The cavity above the electrostatic floor 43 houses integrated energy storage cabinets 5, integrated power supply cabinets 6, server racks 7, heptafluoropropane fire extinguishers 8, air conditioners 9, and other equipment. Return air vents are located on the electrostatic floor below these equipment. A heat exchange coil 10 is located in the cavity below the electrostatic floor. The data center body is equipped with a seawater cooling and closed cold aisle system, including the heat exchange coil 10 and the air conditioner 9. The heat exchange coil 10 is located in the cavity below the electrostatic floor 43, with both ends connected to seawater outside the data center compartment 41. The seawater inside the heat exchange coil 10 is circulated by a water pump. The condenser of the air conditioner 9 is located outside the data center compartment 41 and is directly cooled by seawater.

[0047] The maintenance compartment 1 is equipped with a sealed maintenance compartment door 22 and a docking robotic arm 2. The sealed maintenance compartment door 22 is circular, with a temperature and humidity sensor 23 and a pressure sensor 24 installed on its outer side. It is hinged to the inner wall of the maintenance compartment via a door hinge 21. The docking robotic arm is installed at the front end of the sealed maintenance compartment door 22 and includes a telescopic connecting rod 25 and a conical guide head 26. Multiple locking devices 27 are evenly distributed circumferentially on the conical guide head 26. The two ends of the telescopic connecting rod 25 are connected to the conical guide head 26 and the sealed maintenance compartment door 22, respectively, and the central axes of the three are collinear. The standard sealing interface of the data center compartment door 3 is provided with a groove that mates with the outer surface of the sealed maintenance compartment door and the docking robotic arm, as well as an annular locking groove 31 for locking, to ensure a tight and sealed connection between the maintenance compartment and the data center compartment.

[0048] The end face attitude adjustment power unit 13 is located at the center of the rear end face of the maintenance compartment 1, and the propulsion axis of the end face attitude adjustment power unit 13 coincides with the main axis of the maintenance compartment 1; multiple side attitude adjustment power units 14 are evenly distributed on the rear end of the side wall of the maintenance compartment on the same cross section, and the propulsion axis of the side attitude adjustment power unit 14 forms an angle of 50°-70° with the main axis of the maintenance compartment 1, preferably 60°. Each side attitude adjustment power unit 14 uses a vector thruster or a ducted propeller to achieve power propulsion.

[0049] The front end of the maintenance compartment 1 is a conical transition structure and is equipped with a standard sealing interface for the maintenance compartment. A drain outlet 15 is arranged below the interface. The drain outlet 15 passes through the sealing interface and communicates with the ballast cavity to form a seawater discharge channel.

[0050] In this embodiment, the drain outlet 15 is equipped with a three-stage filtration structure, including a coarse filter with gradually decreasing pore size, a vortex separator, and an electromagnetic check valve. The electromagnetic check valve automatically locks after the maintenance compartment and the data center compartment are docked.

[0051] like Figure 3 and Figure 4 As shown, the maintenance compartment sealing door 22 is cylindrical and reliably connected to the sealing door hinge 21. The temperature and humidity sensor 23 and the pressure sensor 24 are fixed on the outer end face of the maintenance compartment sealing door 22. The edge of the maintenance compartment sealing door 22 is provided with a chamfered sealing surface. The rotation angle of the maintenance compartment sealing door 22 around the sealing door hinge 21 is limited to 0°-110°. In the closed state, the maintenance compartment sealing door 22 and the inner wall of the maintenance compartment form a multi-layer mechanical seal structure, including at least one O-ring and one metal hard seal.

[0052] The telescopic connecting rod 25 is a rod-shaped structure. Its surface, which is connected to the sealed door 22 of the maintenance compartment, has trapezoidal threads to achieve telescopic movement. The lead of the trapezoidal thread of the telescopic connecting rod 25 is 5-15mm, and the thread helix angle is less than 5°. Its maximum telescopic stroke is 1.2-1.5 times the diameter of the sealing mating surface, and the surface of the rod is covered with an anti-corrosion and wear-resistant coating.

[0053] The front end of the tapered guide head 26 has a tapered structure and the surface is made of electrically controlled strong magnetic material. The cone angle is 30°-45°. Its outer contour fits tightly with the internal groove surface of the data center compartment sealing door 3. Multiple locking devices 27 are evenly distributed and fixed on the circumferential direction of the cylindrical outer surface of the rear end of the tapered guide head 26. Each locking device 27 may include a triangular locking tongue and a bidirectional hydraulic drive mechanism. When the locking tongue is extended, it forms a contact interlock structure with the annular locking groove of the standard sealing interface of the data center compartment sealing door 3. When retracted, it is completely submerged inside the tapered guide head 26.

[0054] The magnetic induction intensity of the electromagnetic material on the surface of the tapered guide head 26 can reach 0.8-1.5T when energized, and the residual magnetic field intensity is less than 0.01T after power is cut off.

[0055] In this embodiment, the temperature and humidity sensor 23 and the pressure sensor 24 are arranged redundantly, including two sets of independent measurement units, and the sensor signal lines run along the inner cavity of the sealing door hinge 21 to realize signal transmission under pressure sealing conditions.

[0056] This invention also provides a method for docking a subsea data center capable of in-situ maintenance. This method achieves in-situ maintenance of the subsea data center using the in-situ maintenance subsea data center described in the above embodiments. The implementation process is as follows:

[0057] The underwater data center maintenance personnel enter the maintenance compartment 1 from the shore through the sealed door 22. The sealed door of the maintenance compartment 1 is then closed. At this time, the telescopic connecting rod 25 is in the extended state. The drainage pump in the ballast cavity of the maintenance compartment 1 is started to expel the air and pump in the ballast water, so that the maintenance compartment 1 can be submerged to the target position on the seabed.

[0058] When the maintenance compartment 1 reaches the vicinity of the standard sealed interface of the data center compartment 41, the docking attitude is changed in real time by manipulating the end face attitude adjustment power device 13 and the side attitude adjustment power device 14. After the maintenance compartment 1 is adjusted to the predetermined docking position, the surface of the conical guide head 26 is energized to form a strong magnetic effect. At this time, the conical guide head 26 will attract the data center compartment sealing door 3. Under the pushing action of the end face attitude adjustment power device 13, and guided by the conical guide head 26, the interface of the conical guide head 26 and the data center compartment sealing door 3 are completely fitted. At this time, the locking device 27 pops out and locks into the annular locking groove 31 of the data center compartment sealing door 3. Then the telescopic connecting rod 25 retracts and is pulled by the conical guide head 26. The maintenance compartment moves towards the data center compartment 41 until the maintenance compartment 1 and the data center compartment 41 are tightly fitted together. The sealing system then activates to seal the compartment. After sealing, seawater is discharged from the cavity between the docking interfaces through the drain outlet 15. At the same time, air flows from the maintenance compartment 1 into the cavity to balance the pressure. Temperature, humidity and pressure inside the cavity are recorded by temperature and humidity sensor 23 and pressure sensor 24. When the seawater inside the cavity has been drained and the temperature, humidity and pressure have reached the predetermined conditions, the conical guide head 26 is de-energized and demagnetized, the locking device 27 is reset, and the telescopic connecting rod 25 continues to retract, disengaging from the data center compartment sealing door 3. Maintenance personnel can then open the maintenance compartment sealing door 22 from inside the maintenance compartment 1 and enter the data center compartment 41 to perform maintenance and repair work.

[0059] If maintenance personnel encounter danger inside maintenance compartment 1, the high-pressure inert gas generator can quickly release high-pressure gas and discharge ballast seawater, causing maintenance compartment 1 to float rapidly and achieve the purpose of escaping danger.

[0060] The data center compartment cools the equipment using a closed cold aisle cooling system. Driven by the air conditioner, hot air inside the compartment enters the cavity through the return air vents of the electrostatic floor under the equipment. It first exchanges heat with the cooler seawater inside the heat exchange coil 10, achieving pre-cooling. Then, it enters the air conditioning cavity through the return air vents under the air conditioner 9, exchanging heat with the evaporator to become low-temperature air. Finally, the low-temperature air is discharged from the top of the air conditioner and enters the equipment compartment again, carrying away heat, thus repeating the cycle. If the seawater temperature in the area is low, the air conditioner can operate without starting the compressor, only using the fan to power the air circulation, further saving energy and significantly enhancing the data center's applicability to sea areas at different latitudes.

[0061] This method solves the problems of frequent hoisting, high cost and poor safety in the maintenance of traditional submarine data centers. It allows maintenance personnel to enter the cabin to perform operations such as troubleshooting and replacing parts, which significantly improves maintenance efficiency and the reliability of submarine data centers. Combined with seawater cooling and closed cold aisle systems, it can greatly reduce the PUE value of data center operation.

[0062] Through the specific embodiments described above, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the specific embodiments described above. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

[0063] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.

Claims

1. A subsea data center capable of in-situ maintenance, characterized in that, It includes a maintenance compartment and a data center body. The maintenance compartment and the data center compartment are connected through a standard sealed interface with a sealed door and a docking robotic arm structure. The lower part of the maintenance compartment is equipped with a floor, which forms a sealed ballast cavity with the inner wall of the maintenance compartment. The ballast cavity contains an inert gas generating module and a drainage pump. The front end of the maintenance compartment has a conical transition structure and is equipped with a standard sealing interface for the maintenance compartment. A drainage port is arranged below the interface, which passes through the sealing interface and communicates with the ballast cavity to form a seawater discharge channel. The outer surface of the maintenance compartment integrates an end face attitude adjustment power device and a side attitude adjustment power device for underwater positioning and attitude adjustment. The data center consists of a data center cabin and a data center base. The lower part of the data center cabin is equipped with an electrostatic floor, which divides the cabin into upper and lower cavities. The cavity above the electrostatic floor houses equipment including an integrated energy storage cabinet, an integrated power supply cabinet, server racks, a heptafluoropropane fire extinguisher, and an air conditioner. A return air vent is located on the electrostatic floor below the equipment. A heat exchange coil is located in the cavity below the electrostatic floor. Both ends of the heat exchange coil are connected to seawater outside the data center cabin, and the seawater inside the heat exchange coil is circulated by a water pump. The condenser of the air conditioner is located outside the data center cabin and is directly cooled by seawater. The sealing door and docking robotic arm structure includes a maintenance compartment sealing door and a data center compartment sealing door. The maintenance compartment is equipped with a maintenance compartment sealing door and a docking robotic arm. The maintenance compartment sealing door is circular, with temperature and humidity sensors and pressure sensors installed on its outer side. It is hinged to the inner wall of the maintenance compartment via a sealing door hinge. The docking robotic arm is installed at the front end of the maintenance compartment sealing door and includes a telescopic connecting rod and a conical guide head. Multiple locking devices are evenly distributed circumferentially on the conical guide head. The two ends of the telescopic connecting rod are connected to the conical guide head and the maintenance compartment sealing door, respectively, and the central axes of the three are collinear. The standard sealing interface of the data center compartment sealing door is provided with a groove that mates with the outer surface of the maintenance compartment sealing door and the docking robotic arm, as well as an annular locking groove for locking. The propulsion axis of the end face attitude adjustment power unit coincides with the main axis of the maintenance compartment; multiple side attitude adjustment power units are evenly distributed on the rear end of the side wall of the maintenance compartment on the same cross section, and the propulsion axis of the side attitude adjustment power unit forms an angle of 50°-70° with the main axis of the maintenance compartment. The side attitude adjustment power unit uses a vector thruster or a ducted propeller to achieve power propulsion. The telescopic connecting rod is a rod-shaped structure. Its surface, which is connected to the sealed door of the maintenance compartment, has trapezoidal threads to achieve telescopic movement. Its maximum telescopic stroke is 1.2-1.5 times the diameter of the sealing mating surface, and the surface of the rod is covered with an anti-corrosion and wear-resistant coating. The front end of the tapered guide head has a tapered structure and the surface is made of electrically controlled strong magnetic material. Its outer contour fits tightly with the internal groove surface of the data center compartment sealing door. Multiple locking devices are evenly distributed and fixed on the circumferential direction of the cylindrical outer surface of the rear end of the tapered guide head. Each locking device includes a triangular locking tongue and a two-way hydraulic drive mechanism. When the locking tongue is extended, it forms a contact interlock structure with the annular locking groove of the standard sealing interface of the data center compartment. When it is retracted, it is completely submerged inside the tapered guide head. The telescopic connecting rod has a trapezoidal thread lead of 5-15mm and a thread helix angle of less than 5°. The cone angle of the cone-shaped guide head is 30°-45°, and the magnetic induction intensity of the electromagnetic material on its surface reaches 0.8-1.5T when energized, and the residual magnetic field intensity is less than 0.01T after power is cut off.

2. The subsea data center capable of in-situ maintenance according to claim 1, characterized in that, The drain outlet is equipped with a three-stage filtration structure, including a coarse filter with gradually decreasing pore size, a vortex separator, and an electromagnetic check valve. The electromagnetic check valve automatically locks after docking is completed.

3. The subsea data center capable of in-situ maintenance according to claim 1, characterized in that, The maintenance compartment sealing door has a chamfered sealing surface at its edge. The rotation angle of the maintenance compartment sealing door around the hinge is limited to 0°-110°. In the closed state, the maintenance compartment sealing door and the inner wall of the maintenance compartment form a multi-mechanical sealing structure, including at least one O-ring and one metal hard seal.

4. The subsea data center capable of in-situ maintenance according to claim 1, characterized in that, The temperature and humidity sensor and the pressure sensor are arranged redundantly, including two sets of independent measurement units, and the sensor signal lines run along the inner cavity of the sealed door hinge to realize signal transmission under pressure sealing conditions.

5. A method for docking a submarine data center that allows for in-situ maintenance, characterized in that... This method achieves in-situ maintenance of the subsea data center using the in-situ maintenance-enabled subsea data center as described in any one of claims 1 to 4. The implementation process is as follows: The underwater data center maintenance personnel enter the maintenance compartment from the shore through the sealed door. The sealed door of the maintenance compartment is then closed. At this time, the telescopic connecting rod is in the extended state. The drainage pump in the ballast cavity of the maintenance compartment is started to expel the air and pump in the ballast water, so that the maintenance compartment can be submerged to the target position on the seabed. When the maintenance compartment reaches the vicinity of the standard sealed interface of the data center compartment, the docking attitude is changed in real time by manipulating the end face attitude adjustment power unit and the side attitude adjustment power unit. After the maintenance compartment is adjusted to the predetermined docking position, the surface of the conical guide head is energized to form a strong magnetic effect. At this time, the conical guide head attracts the data center compartment's sealed door. Under the pushing action of the end face attitude adjustment power unit, and guided by the conical guide head, the interface of the conical guide head and the data center compartment's sealed door are completely fitted. At this time, the locking device pops out and locks into the annular locking groove of the data center compartment's sealed door. Then, the telescopic connecting rod retracts, pulling the maintenance compartment through the conical guide head. The maintenance compartment moves towards the data center compartment until they are tightly fitted together. The sealing system then activates to seal the compartment. Once the seal is complete, seawater is drained from the cavity between the interfaces through the drain outlet. Simultaneously, air flows from the maintenance compartment into the cavity to balance the pressure. Temperature, humidity, and pressure are recorded by temperature and humidity sensors and pressure sensors. When the seawater has been drained and the temperature, humidity, and pressure have reached the predetermined conditions, the conical guide head is de-energized and demagnetized, the locking device is reset, and the telescopic connecting rod continues to retract, disengaging from the sealing door of the data center compartment. Maintenance personnel can then open the sealing door of the maintenance compartment from inside the maintenance compartment and enter the data center compartment to perform maintenance and repair work. If maintenance personnel encounter danger inside the maintenance compartment, the high-pressure inert gas generator can quickly release high-pressure gas and discharge ballast seawater, causing the maintenance compartment to float rapidly and achieve the purpose of escaping danger.

6. The method for docking a submarine data center capable of in-situ maintenance according to claim 5, characterized in that, The data center compartment cools the equipment through a closed cold aisle. Driven by the air conditioner, hot air in the compartment enters the cavity through the return air vent of the electrostatic floor under the equipment. First, it exchanges heat with the cool seawater in the heat exchange coil to achieve pre-cooling treatment of the hot air. Then, it enters the air conditioning cavity through the return air vent under the air conditioner and exchanges heat with the evaporator to become low-temperature air. Finally, the low-temperature air is discharged from the top of the air conditioner and enters the equipment compartment to take away heat again. This cycle repeats. When the sea temperature in the area is low, the air conditioner does not start the compressor, but only turns on the fan to provide power for air circulation.

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