Helium cooling system suitable for high-density air cooling cabinet

Abstract

The utility model discloses a helium cooling system suitable for a high-density air-cooled cabinet, and the system comprises a sealing box which is internally provided with a sealing cavity, the interior of the sealing cavity is suitable for the arrangement of a server, and the interior of the sealing cavity is filled with helium; the driving part and the server are arranged in a spaced mode so as to drive the helium to flow in the sealing cavity in the direction from the driving part to the server; and the heat exchanger is arranged between the driving part and the server so as to exchange heat with the helium. According to the helium cooling system disclosed by the utility model, the helium is adopted as a heat exchange medium, and the nitrogen flows to the server after passing through the heat exchanger to cool the server, so that the overall heat exchange capability of the cooling system is improved, the heat dissipation requirement of the server is met, static electricity is not easy to generate, and equipment damage caused by the static electricity can be reduced; while the heat dissipation requirement of the server is met, original cooling parts are reserved as much as possible, the system modification cost is reduced, and the economical efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of data center cooling technology, and in particular to a helium cooling system suitable for high-density air-cooled cabinets. Background Technology

[0002] Related technologies indicate that with the rapid development of information technology and the widespread application of intelligent computing power, the computing power of data centers continues to improve, and the power density of single racks is also gradually increasing, now reaching 50kW or even higher. While this high power density configuration significantly improves computing power, it also brings severe heat dissipation challenges. Traditional air-cooling technology is increasingly unable to meet the heat dissipation requirements of high-power-density racks. Most existing air-cooling systems can only effectively handle heat loads of around 10kW. However, with the continuous increase in rack power density, the heat exchange capacity of traditional air-cooling methods is gradually becoming a bottleneck. This insufficient heat dissipation leads to excessively high internal temperatures within the rack, thereby increasing the risk of chip overheating and system failure, seriously threatening the operational stability and efficiency of the data center.

[0003] To address the heat dissipation challenges of high-power-density server racks, researchers and engineers have begun actively exploring the application of liquid cooling technology in data centers. Compared to traditional air cooling, liquid cooling systems offer higher heat exchange efficiency. They significantly improve heat dissipation by directly or indirectly exchanging heat with the heat source through a liquid medium with excellent thermal conductivity (such as water or special coolants). However, current liquid cooling systems still face numerous technical and practical application challenges.

[0004] First, the piping design of liquid cooling systems is complex, especially for cold plate liquid cooling systems which require precise piping layout and cabling within the server rack, increasing the difficulty of installation and maintenance. Second, liquid cooling systems may not be fully compatible with existing server hardware, especially in older equipment. Introducing liquid cooling often requires additional modifications or equipment replacement, thus increasing deployment costs. Furthermore, the initial investment in liquid cooling systems is high, including the procurement costs of key equipment such as coolant, pumps, and piping, limiting its short-term economic viability. Therefore, for data centers that currently rely primarily on air cooling technology, traditional air cooling cannot effectively meet the heat dissipation requirements of high-power-density server racks, while a complete shift to liquid cooling systems faces issues of design complexity, compatibility, and high costs. How to design more innovative heat dissipation solutions for high-density server racks while balancing efficient heat dissipation and cost-effectiveness has become a critical technical problem that urgently needs to be solved. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a helium cooling system suitable for high-density air-cooled server racks. This helium cooling system can ensure cooling efficiency while guaranteeing the safety of data center servers, and has low modification costs.

[0006] According to the present invention, a helium cooling system suitable for high-density air-cooled server racks includes: a sealed box, wherein a sealed cavity is formed inside the sealed box, the sealed cavity is adapted to house a server, and the sealed cavity is filled with helium; a drive unit, wherein the drive unit is arranged at a distance from the server to drive the helium to flow from the drive unit toward the server within the sealed cavity; and a heat exchanger, wherein the heat exchanger is disposed between the drive unit and the server to exchange heat with the helium.

[0007] The helium cooling system for high-density air-cooled server racks according to this invention uses helium as the heat exchange medium. Nitrogen flows to the server after passing through the heat exchanger to cool the server. Utilizing its superior heat exchange characteristics, helium reduces the heat exchange resistance during the air-side heat exchange process, thereby improving the overall heat exchange capacity of the cooling system and meeting the server's heat dissipation requirements. Furthermore, it ensures gas compatibility and safety with existing equipment. As a chemically stable inert gas, helium is directly compatible with servers, does not easily generate static electricity, and can reduce equipment damage caused by static electricity. It also has inherent fire-fighting properties, thus ensuring the safety of data center servers. While meeting the server's heat dissipation requirements, it retains as many original cooling components as possible, reducing system modification costs and improving economic efficiency.

[0008] In some embodiments, the helium cooling system for high-density air-cooled cabinets further includes: a cold source connected to the heat exchanger to introduce refrigerant into the heat exchanger.

[0009] In some embodiments, the cold source includes an inlet pipe and an outlet pipe, a heat exchange channel is formed inside the heat exchanger, and an inlet and an outlet are formed on the heat exchanger that communicate with the heat exchange channel. One end of the inlet pipe is connected to the cold source and the other end is connected to the inlet, and one end of the outlet pipe is connected to the cold source and the other end is connected to the outlet.

[0010] In some embodiments, the drive element is a fan, and the fan includes a plurality of fans arranged in an array on the surface of the heat exchanger.

[0011] In some embodiments, the sealed box has two first side plates arranged opposite each other in the length direction, wherein the distance between the first side plate located on the side closer to the drive member and the drive member is not less than 30 cm, and / or the distance between the first side plate located on the side farther from the drive member and the server is not less than 30 cm.

[0012] In some embodiments, the sealed box has two second side panels arranged opposite each other in the width direction, and the distance between each second side panel and the server is 0-5 cm.

[0013] In some embodiments, the sealed box has an access port, the sealed box includes a door panel, the door panel is openably disposed at the location of the access port, and a sealing element is provided on the inner peripheral side of the access port and / or the outer peripheral side of the door panel.

[0014] In some embodiments, the air pressure inside the sealed cavity is 1 bar to 1.5 bar.

[0015] In some embodiments, the helium cooling system for high-density air-cooled cabinets further includes: an air pump connected to the sealed box for pumping helium into the sealed cavity; and a pressure sensor disposed in the sealed cavity for monitoring the gas pressure within the sealed cavity.

[0016] In some embodiments, the helium cooling system suitable for high-density air-cooled cabinets further includes: a control valve, which is located between the air pump and the sealed box, for controlling the opening and closing of the passage between the air pump and the sealed box; and a control module, which is electrically connected to the drive unit, the pressure sensor, the air pump and the control valve.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a helium cooling system according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 This is a schematic diagram of the helium cooling system from another angle.

[0020] Figure label:

[0021] 100. Helium cooling system;

[0022] 1. Sealed box; 11. Sealed cavity; 12. First side plate; 13. Second side plate;

[0023] 2. Drive components; 21. Fan;

[0024] 3. Heat exchanger; 4. Inlet pipe; 5. Outlet pipe;

[0025] 200. Server. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] The following is for reference. Figure 1 and Figure 2 Description of a helium cooling system 100 suitable for high-density air-cooled cabinets according to an embodiment of the present invention.

[0028] like Figure 1 and Figure 2 As shown, the helium cooling system 100 for high-density air-cooled cabinets according to an embodiment of the present invention includes: a sealed box 1, a drive component 2, and a heat exchanger 3.

[0029] Specifically, a sealed cavity 11 is formed inside the sealed box 1. The sealed cavity 11 is suitable for housing a server and is filled with helium. The drive unit 2 is arranged at a distance from the server to drive the helium to flow from the drive unit 2 towards the server within the sealed cavity 11. A heat exchanger 3 is located between the drive unit 2 and the server to exchange heat with the helium. It can be understood that the sealed cavity 11 is filled with helium, and the drive unit 2 drives the helium flow, causing the helium to flow from one side of the drive unit 2 to the other side of the server. The heat exchanger 3 is a key component in the path of the helium flow. When the helium flows through the heat exchanger 3, it exchanges heat with the heat exchanger 3, lowering the temperature of the helium. After absorbing heat from the server, the low-temperature helium flow returns to the drive unit 2, forming a stable internal circulation.

[0030] The helium cooling system 100 for high-density air-cooled server racks according to an embodiment of this utility model uses helium as the heat exchange medium. Nitrogen flows to the server after passing through the heat exchanger 3 to cool the server. Utilizing its superior heat exchange characteristics, helium reduces the heat exchange resistance during the air-side heat exchange process, thereby improving the overall heat exchange capacity of the cooling system, meeting the server's heat dissipation requirements, and ensuring gas compatibility and safety with existing equipment. As a chemically stable inert gas, helium is directly compatible with the server, does not easily generate static electricity, and can reduce equipment damage caused by static electricity. It also has inherent fire-fighting properties, thus ensuring the safety of data center servers. While meeting the server's heat dissipation requirements, it retains the original cooling components as much as possible, reducing system modification costs and improving economic efficiency.

[0031] Because helium's thermal conductivity is approximately six times that of air, its convective heat transfer coefficient is higher than that of air. Under the same gas flow rate and heat transfer conditions, the logarithmic mean temperature difference required for helium's heat transfer process is smaller. Therefore, compared to traditional air cooling systems, the helium cooling system 100 of this invention can operate at the same server temperature while requiring a higher external cold source temperature. Similarly, under the same cold source temperature and gas flow rate conditions, the heat transfer capacity of the helium cooling system 100 is far superior to that of an air cooling system, enabling it to more efficiently meet the heat dissipation requirements of high-power-density server racks.

[0032] Furthermore, helium, as a chemically stable inert gas, is not prone to generating static electricity, significantly reducing the risk of equipment damage caused by static electricity. It also possesses certain fire-fighting properties, further enhancing the safety of the helium cooling system 100. In addition, the helium cooling system 100 is directly compatible with existing air-cooled cabinets, requiring no complex modifications, significantly reducing the cost and difficulty of system upgrades.

[0033] In some embodiments of this utility model, the helium cooling system 100 suitable for high-density air-cooled cabinets further includes: a cold source, which is connected to the heat exchanger 3 to introduce refrigerant into the heat exchanger 3. Further, the cold source includes an inlet pipe 4 and an outlet pipe 5. A heat exchange channel is formed inside the heat exchanger 3. An inlet and an outlet are formed on the heat exchanger 3 to communicate with the heat exchange channel. One end of the inlet pipe 4 is connected to the cold source and the other end is connected to the inlet. One end of the outlet pipe 5 is connected to the cold source and the other end is connected to the outlet.

[0034] Understandably, the cold source provides low-temperature refrigerant to absorb and remove heat from the helium. The cold source is connected to heat exchanger 3 via pipes, ensuring the refrigerant can smoothly enter and remove heat. The cold source dynamically adjusts the refrigerant temperature according to the data center's load, ensuring heat exchanger 3 is always in optimal working condition and provides continuous and effective cooling. One end of the inlet pipe 4 is connected to the cold source to obtain low-temperature refrigerant, and the other end is connected to the inlet on heat exchanger 3, introducing the refrigerant into the heat exchange channels inside heat exchanger 3. One end of the outlet pipe 5 is connected to the cold source to return the high-temperature refrigerant that has absorbed heat to the cold source for further cooling, and the other end is connected to the outlet on heat exchanger 3 to receive high-temperature refrigerant from heat exchanger 3. Thus, the helium cooling system 100 achieves efficient heat transfer and stable operation, meeting the heat dissipation requirements of high-power-density data centers.

[0035] Here, the refrigerant can be water, antifreeze, or other highly efficient heat transfer liquids.

[0036] In some embodiments of this utility model, the driving component 2 is a fan 21, and multiple fans 21 are arranged in an array on the surface of the heat exchanger 3. That is, the multiple fans 21 are arranged in an array on the surface of the heat exchanger 3 to ensure that helium can flow evenly across the entire surface of the heat exchanger 3, thereby improving heat exchange efficiency. The fans 21 are located on one side of the heat exchanger 3 and are spaced apart from the server, so that helium flows from the side of the fans 21 to the side of the server, and then completes heat exchange through the heat exchanger 3, thereby improving the performance, reliability, and economy of the helium cooling system 100.

[0037] In some embodiments of this utility model, such as Figure 1 As shown, the sealed chamber 1 has two first side plates 12 arranged opposite each other in the longitudinal direction. The distance between the first side plate 12 located closer to the drive member 2 and the drive member 2 is not less than 30 cm, and / or the distance between the first side plate 12 located farther from the drive member 2 and the server is not less than 30 cm. It is understood that by maintaining a distance of at least 30 cm, sufficient space is ensured for helium to flow and exchange heat, avoiding local airflow blockage or turbulence, improving cooling efficiency. A larger spacing helps reduce heat backflow from the server to the heat exchanger 3, preventing the helium that has just been cooled from being reheated, thereby improving the overall heat dissipation effect. An appropriate spacing can promote the uniform distribution of helium throughout the sealed chamber 11, avoiding overheating or insufficient cooling in certain areas.

[0038] For example, the distance between the first side plate 12 located on the side closer to the drive component 2 and the drive component 2 can be: 30cm, 31cm, 32cm, 33cm, 34cm, 35cm, 36cm, 37cm, 38cm, 39cm, 40cm, 41cm, 42cm, 43cm, 44cm, 45cm, 46cm, 47cm, 48cm, 49cm, 50cm, etc.; the distance between the first side plate 12 located on the side farther from the drive component 2 and the server can be: 30cm, 31cm, 32cm, 33cm, 34cm, 35cm, 36cm, 37cm, 38cm, 39cm, 40cm, 41cm, 42cm, 43cm, 44cm, 45cm, 46cm, 47cm, 48cm, 49cm, 50cm, etc.

[0039] In some embodiments of this utility model, such as Figure 2 As shown, the sealed enclosure 1 has two second side plates 13 arranged opposite each other in the width direction, and the distance between each second side plate 13 and the server is 0-5 cm. It can be understood that in order to avoid gas backflow, the distance between the second side plate 13 and the server is minimized to ensure heat exchange efficiency.

[0040] For example, the distance between each second side panel 13 and the server can be 0cm, 0.1cm, 0.2cm, 0.3cm, 0.4cm, 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1.0cm, 1.5cm, 2.0cm, 2.5cm, 3.0cm, 3.5cm, 4.0cm, 4.5cm, 5.0cm, etc.

[0041] In some embodiments of this utility model, the sealed box 1 has an inspection port. The sealed box 1 includes a door panel, which is openable and located at the inspection port. Sealing elements are provided on the inner periphery of the inspection port and / or the outer periphery of the door panel. Therefore, the helium cooling system 100 not only achieves efficient heat transfer and stable operation within a compact space, but also facilitates maintenance and repair, further improving the performance, reliability, and economy of the helium cooling system 100, and meeting the heat dissipation requirements of high-power-density data centers.

[0042] In some embodiments of this invention, to effectively prevent external dust and contaminants from entering the sealed cavity 11 and protect the server from damage, the gas pressure inside the sealed cavity 11 is 1 bar to 1.5 bar. It is understood that 1 bar is equivalent to atmospheric pressure, which is the minimum operating pressure, ensuring that helium can operate in a normal environment; 1.5 bar is slightly higher than atmospheric pressure, which helps enhance the flowability and heat exchange efficiency of helium while maintaining good sealing. The slightly higher pressure (1.5 bar) can enhance the flowability of helium, allowing it to flow more quickly through the server and heat exchanger 3, improving heat exchange efficiency. A suitable positive pressure environment can effectively prevent outside air from entering the sealed cavity 11, reducing the risk of helium leakage and maintaining a stable internal helium concentration. Moderate pressure also helps enhance the overall structural stability of the sealed box 1, preventing deformation or leakage caused by changes in external pressure.

[0043] For example, the air pressure value inside the sealed cavity 11 can be 1 bar, 1.1 bar, 1.2 bar, 1.3 bar, 1.4 bar, 1.5 bar, etc.

[0044] In some embodiments of this utility model, the helium cooling system 100 suitable for high-density air-cooled cabinets further includes: an air pump and a pressure sensor. The air pump is connected to the sealed housing 1 and is used to pump helium into the sealed cavity 11. The pressure sensor is located inside the sealed cavity 11 to monitor the gas pressure inside the sealed cavity 11. It is understood that the air pump connected to the sealed housing 1 is used to pump helium into the sealed cavity 11 to ensure that the helium concentration and pressure inside the sealed cavity 11 are maintained within a set range. The pressure is dynamically adjusted according to actual needs to ensure that it is always between 1 bar and 1.5 bar. Therefore, the helium cooling system 100 can not only achieve efficient heat transfer and stable operation in a compact space, but also facilitate maintenance and repair, further improving the system's performance, reliability, and economy, and meeting the heat dissipation requirements of high-power-density data centers.

[0045] In some embodiments of this utility model, the helium cooling system 100 suitable for high-density air-cooled cabinets further includes: a control valve and a control module. The control valve is located between the air pump and the sealed chamber 1 and is used to control the opening and closing of the passage between the air pump and the sealed chamber 1. The control module is electrically connected to the drive unit 2, the pressure sensor, the air pump, and the control valve. It is understood that the system collects data from the pressure sensor in real time, monitors pressure changes within the sealed chamber 11, and sends control commands to the air pump, control valve, and fan 21 based on feedback from the pressure sensor to adjust air pressure and airflow. Through a built-in algorithm, the system dynamically adjusts the fan 21 speed, air pump start / stop, and control valve opening / closing to ensure the system always operates in optimal condition. When an abnormality occurs in the system, an alarm is triggered and the event is recorded for subsequent analysis and maintenance.

[0046] The following will refer to Figure 1 and Figure 2 Description of a helium cooling system 100 suitable for high-density air-cooled cabinets according to two specific embodiments of the present invention.

[0047] Example 1,

[0048] With a typical heat exchange capacity of around 10kW, the helium cooling system 100 of this embodiment, thanks to the superior heat exchange performance of helium, exhibits a lower logarithmic mean temperature difference during the heat exchange process compared to traditional air cooling systems. This allows for the use of a higher-temperature external cold source when cooling servers, thereby extending the time the cooling system utilizes natural cold sources and reducing the temperature requirements of these sources. In compression refrigeration applications, a higher-temperature cold source means reduced compressor power consumption, effectively decreasing the cooling system's operating energy consumption and improving overall energy efficiency.

[0049] Example 2,

[0050] In high-density heat dissipation scenarios of 50kW and above, the high heat exchange efficiency of helium enables it to achieve higher heat dissipation compared to traditional air-cooled systems under the same external cold source temperature and gas flow rate, thus significantly improving the heat dissipation limit of air-cooled systems. Compared to liquid cooling systems, the helium cooling system 100 of this embodiment does not require specially designed servers compatible with the cooling system, nor does it require adding complex piping devices to the existing air-cooled cabinet. It only requires adding a sealed box 1 to the outside of the existing air-cooled cabinet to simultaneously achieve helium sealing and filling. The construction process is simple and quick, the modification cost is reduced, and it combines high efficiency and economy.

[0051] In summary, the helium cooling system 100 of this utility model uses helium as the cooling medium, which possesses advantages such as chemical stability, non-flammability, non-combustibility, non-toxicity, odorlessness, and non-corrosiveness, and has a certain fire-fighting capability. As an inert gas, helium does not react chemically with other substances, and its intact monatomic molecular structure makes it difficult to lose or gain electrons, thus reducing the likelihood of static electricity generation. This makes the helium cooling system 100 more suitable for special scenarios where infrequent maintenance is not required or difficult, such as underwater data centers. The helium cooling system 100 of this utility model can effectively reduce the risk of equipment damage and further ensure the safe and stable operation of the system.

[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A helium cooling system suitable for high-density air-cooled server racks, characterized in that, include: A sealed box, wherein a sealed cavity is formed inside the sealed box, the sealed cavity is adapted to house a server, and the sealed cavity is filled with helium gas; A driving element, which is spaced apart from the server, to drive the helium gas to flow from the driving element toward the server within the sealed cavity; A heat exchanger is disposed between the drive unit and the server to exchange heat with the helium gas.

2. The helium cooling system for high-density air-cooled cabinets according to claim 1, characterized in that, Also includes: A cold source, which is connected to the heat exchanger to introduce refrigerant into the heat exchanger.

3. The helium cooling system for high-density air-cooled cabinets according to claim 2, characterized in that, The cold source includes an inlet pipe and an outlet pipe. A heat exchange channel is formed inside the heat exchanger. An inlet and an outlet are formed on the heat exchanger that communicate with the heat exchange channel. One end of the inlet pipe is connected to the cold source and the other end is connected to the inlet. One end of the outlet pipe is connected to the cold source and the other end is connected to the outlet.

4. The helium cooling system for high-density air-cooled cabinets according to claim 3, characterized in that, The driving component is a fan, and the fan comprises a plurality of fans arranged in an array on the surface of the heat exchanger.

5. The helium cooling system for high-density air-cooled cabinets according to any one of claims 1-4, characterized in that, The sealed box has two first side plates arranged opposite each other in the length direction, the distance between the first side plate located closer to the drive member and the drive member is not less than 30cm, and / or the distance between the first side plate located away from the drive member and the server is not less than 30cm.

6. The helium cooling system for high-density air-cooled cabinets according to any one of claims 1-4, characterized in that, The sealed box has two second side plates arranged opposite each other in the width direction, and the distance between each second side plate and the server is 0-5cm.

7. The helium cooling system for high-density air-cooled cabinets according to any one of claims 1-4, characterized in that, The sealed box has an inspection port, and the sealed box includes a door panel that can be opened and is located at the inspection port. A sealing element is provided on the inner circumference of the inspection port and / or the outer circumference of the door panel.

8. The helium cooling system for high-density air-cooled cabinets according to any one of claims 1-4, characterized in that, The air pressure inside the sealed cavity is 1 bar to 1.5 bar.

9. The helium cooling system for high-density air-cooled cabinets according to claim 8, characterized in that, Also includes: An air pump, connected to the sealed box, is used to pump helium gas into the sealed cavity; A pressure sensor is provided inside the sealed cavity to monitor the gas pressure inside the sealed cavity.

10. The helium cooling system for high-density air-cooled cabinets according to claim 9, characterized in that, Also includes: A control valve is provided between the air pump and the sealing box, and is used to control the opening and closing of the passage between the air pump and the sealing box; The control module is electrically connected to the drive unit, the air pressure sensor, the air pump, and the control valve.

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