Immersed liquid cooling system and immersed liquid cooling cabinet module

Abstract

The immersed liquid cooling system is used in a cabinet module and comprises a circulating pump set, at least two liquid storage tanks arranged at intervals, a liquid inlet header pipe connected with a liquid outlet of the circulating pump set and a liquid return header pipe connected with a liquid return opening of the circulating pump set, and the liquid storage tanks are arranged in sequence; the circulating pump set is located on one side of the liquid storage tanks arranged in sequence, and the liquid storage tank closest to the circulating pump set is a concentrated liquid return tank. The liquid inlet header pipe conveys cooling liquid to a to-be-cooled component through the liquid inlet branch pipe, the liquid storage tank collects the cooling liquid after heat exchange with the to-be-cooled component, and the liquid return header pipe is connected with the centralized liquid return tank through the liquid return branch pipe. Every two adjacent liquid storage tanks are communicated through the corresponding communication openings and the corresponding communication structures. And under the action of the circulating pump set, the communicating structure is used for conveying the cooling liquid in the next liquid storage tank into the previous liquid storage tank. According to the utility model, the use amount of cooling liquid can be reduced, so that the cost is reduced, and air can be prevented from being mixed into a circulating flow path.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of liquid cooling cabinet, concretely relates to a liquid cooling system and submerged liquid cooling cabinet module adopting submerged liquid cooling temperature control mode. BACKGROUND

[0002] In recent years, the digital economy has developed rapidly, and data centers, computing power centers and other infrastructures of modern computing systems are widely used in artificial intelligence, big data, the Internet of Things and other fields. Data centers, computing power centers are deployed with a large number of cabinets with different functions. Some of these cabinets are used to store batteries as energy storage devices, and some are used to store processors, servers, communication devices and other equipment to provide hardware support for data storage, processing and transmission. The equipment in the cabinet will generate a lot of heat during operation, such as the heat generated by the processor during data processing and the heat generated by the battery during charging and discharging. In order to ensure the stable operation of the equipment and avoid overheating that may cause safety accidents, a cooling system is usually installed to cool the equipment in the cabinet.

[0003] According to the difference of heat transfer medium, the cooling system is generally divided into air cooling system and liquid cooling system. Air cooling uses air as the heat transfer medium and carries away heat through air circulation. The air cooling system is simple in structure, but has low heat dissipation efficiency, high noise and high energy consumption. For large data centers, cloud computing centers and other high-density deployment applications with high heat dissipation efficiency requirements, liquid cooling systems are currently more commonly used for temperature control. Liquid cooling uses cooling liquid as the heat transfer medium, and the specific heat capacity of liquid is larger than that of air, which can carry more heat, and the heat dissipation efficiency is higher than that of air cooling system. There are mainly two kinds of heat exchange methods for common liquid cooling systems. One is to use heat exchange plates and other heat exchange devices to transfer the heat generated by the heat generating components to the cooling liquid, and the cooling liquid flows in the circulation system to carry out the heat. The other is that the cooling liquid directly contacts the heat generating components, such as immersing the heat generating components in the cooling liquid, using the high thermal conductivity of the medium to achieve more efficient heat transfer. The submerged liquid cooling system has obvious advantages in reducing temperature, improving heat dissipation efficiency and reducing energy consumption. The inventors have found that the current submerged liquid cooling system still faces some problems that need to be solved. For example, in the submerged liquid cooling scheme, the use amount of circulating liquid is large, resulting in high production cost. In addition, air often inevitably mixes into the circulating flow path of the cooling liquid, such as the liquid in the oil tank area close to the circulating pump being quickly sucked out and easily forming a cavity area, which makes it easier for air to mix into the circulating flow path. If air enters the operation process of the circulating pump, long-term cavitation will shorten the service life of the circulating pump and reduce its performance. SUMMARY

[0004] The utility model aims at providing a submerged liquid cooling system and submerged liquid cooling cabinet module which can reduce cost and avoid air mixing into the circulating flow path.

[0005] To achieve the first purpose, the utility model adopts the following technical solutions:

[0006] The immersion liquid cooling system is used in the cabinet module, comprising: a circulating pump group, at least two interval arranged liquid storage tanks, a liquid inlet main pipe connected with the liquid outlet of the circulating pump group and a liquid return main pipe connected with the liquid return port of the circulating pump group, the liquid storage tanks are sequentially arranged, the circulating pump group is located at one side of the sequentially arranged liquid storage tanks, and one of the liquid storage tanks closest to the circulating pump group is a concentrated liquid return tank; the liquid inlet main pipe delivers the cooling liquid to the parts to be cooled through a liquid inlet branch pipe, the liquid storage tank collects the cooling liquid after heat exchange with the parts to be cooled, the liquid return main pipe is connected with the concentrated liquid return tank through a liquid return branch pipe; two adjacent liquid storage tanks are connected through corresponding communication ports and communication structures; under the action of the circulating pump group, the communication structure is used for transmitting the cooling liquid in the latter liquid storage tank to the former liquid storage tank.

[0007] In some embodiments, the bottom surface height of the former liquid storage tank is lower than that of the latter liquid storage tank among two adjacent liquid storage tanks, and the bottom surface height of the concentrated liquid return tank is the lowest.

[0008] In some embodiments, the communication port is arranged at the bottom of the side wall of the liquid storage tank.

[0009] In some embodiments, the upper part of the liquid storage tank has a ventilation structure.

[0010] In some embodiments, the liquid level height in the concentrated liquid return tank is higher than the height of the liquid return port of the circulating pump group.

[0011] In some embodiments, the liquid return branch pipe is arranged downwardly inclined in a first direction.

[0012] In some embodiments, the communication structure is a liquid storage tank communication pipe, and the liquid storage tank communication pipe connecting two adjacent liquid storage tanks is arranged downwardly inclined in a second direction.

[0013] In some embodiments, the liquid return main pipe is arranged downwardly inclined in a second direction.

[0014] In some embodiments, a pipeline support for supporting the liquid inlet main pipe and the liquid return main pipe is further included, the pipeline support comprises a pair of vertical supports and upper and lower layers of supporting arms mounted on the vertical supports, the liquid inlet main pipe is supported by the upper layer of supporting arms, and the liquid return main pipe is supported by the lower layer of supporting arms.

[0015] In some embodiments, a plurality of mounting positions are arranged on the vertical support, and the supporting arm is arranged at one of the mounting positions. In some embodiments, a plurality of mounting positions are arranged on the vertical support, and the supporting arm is arranged at one of the mounting positions.

[0016] The utility model also provides a kind of submerged liquid cooling cabinet module, including at least one group of server cabinet, and aforementioned submerged liquid cooling system, the liquid storage tank is arranged below the server cabinet.

[0017] In some embodiments, further comprising at least one group of functional cabinet, the functional cabinet includes at least one of communication cabinet, storage cabinet, air conditioning cabinet, fire-fighting cabinet and list head cabinet.

[0018] In some embodiments, the functional cabinet is arranged above the liquid storage tank communication pipe connecting adjacent liquid storage tanks.

[0019] In some embodiments, the server cabinet is provided with a tank containing cooling liquid, the tank is a closed tank or a semi-closed tank, and heat dissipation is achieved by overflow.

[0020] In some embodiments, the tank is a closed tank, each tank is connected to one liquid inlet pipe and two liquid return pipes, the two liquid return pipes are connected to the liquid storage tank through two independent liquid return connection pipes, the inlet ends of the two liquid return pipes are at different heights, the liquid storage tank is provided with a first liquid level sensor, and the tank is provided with a second liquid level sensor.

[0021] In some embodiments, the tank is a closed tank, each tank is connected to one liquid inlet pipe and one liquid return pipe, the liquid return pipe is connected to two independent liquid return connection pipes, the other ends of the liquid return connection pipes are connected to the liquid storage tank, and a pipe control valve is arranged between the connection of the liquid return pipe and the two liquid return connection pipes; the liquid storage tank is provided with a first liquid level sensor, and the tank is provided with a second liquid level sensor.

[0022] In some embodiments, the tank is a semi-closed tank with an open top, the server cabinet is connected to the liquid storage tank through two independent liquid return connection pipes, and the inlet ends of the two liquid return connection pipes are at different heights; the liquid storage tank is provided with a first liquid level sensor, and the server cabinet is provided with a second liquid level sensor.

[0023] In some embodiments, the tank is a semi-closed tank with an open top, the server cabinet is connected to the liquid storage tank through two independent liquid return connection pipes, and one of the liquid return connection pipes is provided with a pipe control valve; the liquid storage tank is provided with a first liquid level sensor, and the server cabinet is provided with a second liquid level sensor.

[0024] From the above technical scheme can be known, the liquid cooling system of the utility model through setting up at least two interval arrangement's liquid storage tank, two liquid storage tanks are connected through the communicating pipe, the liquid storage tank that is connected together by the liquid storage tank communicating pipe forms a big liquid storage device, can reduce the liquid cooling system's coolant consumption, solved the traditional liquid cooling system coolant consumption big problem, reduced the cost. Moreover, the liquid storage tank has the height difference between, from back to front step by step drops, can guarantee that the coolant flows to the circulating pump group and fills the first liquid storage tank, avoid the oil tank area liquid near the circulating pump to be extracted quickly and form the cavity area, solved the pump group flow path easily mixes in the air problem, avoid the long-term cavitation of air in the running process of circulating pump will shorten the service life of circulating pump and reduce its performance. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the embodiment of the utility model, the following will be needed to use the drawing in the embodiment or prior art description briefly introduced, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.

[0026] Figure 1 It is the top view of the submerged liquid cooling cabinet module of the utility model embodiment 1;

[0027] Figure 2 It is the front view of the part cabinet of the submerged liquid cooling cabinet module of the utility model embodiment 1;

[0028] Figure 3 It is the exploded structural schematic diagram of the liquid cooling system of the utility model embodiment 1;

[0029] Figure 4 It is the connection schematic diagram of the liquid cooling system pipeline of the utility model embodiment 1;

[0030] Figure 5a It is the schematic diagram when the liquid storage tank communicating pipe of the utility model embodiment is connected in the bottom of liquid storage tank;

[0031] Figure 5b It is the schematic diagram when the liquid storage tank communicating pipe of the utility model embodiment is connected in the middle / upper portion of liquid storage tank;

[0032] Figure 6 It is the exploded structural schematic diagram of the pipeline support of the utility model embodiment 1;

[0033] Figure 7 It is the schematic diagram of the liquid storage tank of the utility model embodiment and is provided with ventilation structure;

[0034] Figure 8 It is the structural schematic diagram of the submerged liquid cooling cabinet module of the utility model embodiment 2;

[0035] Figure 9 Figure 3 is a structural schematic diagram of the submerged liquid cooling cabinet module of the embodiment 2 of the present application;

[0036] Figure 10 Figure 4 is a structural schematic diagram of the submerged liquid cooling cabinet module of the embodiment 3 of the present application;

[0037] Figure 11 Figure 5 is a structural schematic diagram of the submerged liquid cooling cabinet module of the embodiment 4 of the present application.

[0038] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The present application will be described in detail below with reference to the accompanying drawings. In the detailed description of the embodiments of the present application, the drawings showing the structure of the device will be partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. It should be noted that the drawings are simplified and all use non-precise proportions, only to facilitate, clearly assist in describing the purpose of the embodiments of the present application. At the same time, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features; the terms "positive", "negative", "bottom", "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0040] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements inside, it can be wireless connection, or it can be wired connection. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] Embodiment 1

[0042] With the rapid development of digital economy, computing power centers, data centers, etc. gradually become an important force to promote economic development, serving the fields of artificial intelligence, big data, cloud computing, etc. Computing power centers, data centers will deploy a large number of cabinets, and server components, routers, switches, etc. are placed in the cabinets, among which the server components can be processors, memory modules, storage devices, power supplies (including energy storage batteries), etc. These cabinets are usually placed in columns or rows to form a cabinet module. In some embodiments, the cabinets can also be arranged in a back-to-back shape, or in other array forms. In order to ensure the stable operation of the equipment, the cabinet module will set up a liquid cooling system to cool the heat components with large heat generation in the cabinet. Immersion liquid cooling system has the advantages of high heat dissipation efficiency, low noise and low energy consumption, and is more and more widely used in cabinet modules.

[0043] The immersion liquid cooling cabinet module of the embodiment includes multiple groups of cabinets placed in sequence, and a liquid cooling system for cooling the equipment in the cabinet. The cabinets in the cabinet module can be divided into server cabinets and function cabinets according to the different equipment placed inside. The server cabinet is used to place server components such as processors, memory modules, storage devices, and power supplies. Processors, energy storage batteries, etc. are heat components that will generate a large amount of heat during operation. These components need to be effectively cooled during operation to maintain normal and stable operation. The function cabinet includes but is not limited to communication cabinets, storage cabinets, air conditioning cabinets, fire control cabinets, and column head cabinets, etc. The server cabinets and function cabinets in the cabinet module are usually placed in different areas, such as several server cabinets are placed together to form a group of server cabinets, and a group of function cabinets is placed between the groups of server cabinets. The area where the function cabinets are concentrated is the function cabinet sub-area, and the area where the server cabinets are concentrated is the server cabinet sub-area. The number and arrangement of server cabinets and function cabinets in each sub-area can be set according to requirements. In order to facilitate the setting and maintenance of the pipeline, and to make the cabinet layout neat and good-looking, the circulating pump group of the liquid cooling system is usually set at one side end of a column / row of cabinets. In order to facilitate the description, the end of the cabinet module close to the circulating pump group is defined as the head end of the cabinet module, and the end away from the circulating pump group is defined as the tail end of the cabinet module.

[0044] As Figure 1 and Figure 2As shown, the rack module in this embodiment includes four sub-areas: two server rack sub-areas (A1, A2) and two functional rack sub-areas (B1, B2). The server rack sub-areas and functional rack sub-areas are alternately arranged; server racks are placed in the server rack sub-areas, and functional racks are placed in the functional rack sub-areas. In this embodiment, a functional rack sub-area (B1) is placed after one server rack sub-area (A1), and a server rack sub-area (A2) is placed after one functional rack sub-area (B1), and so on. Alternatively, the rack module in this embodiment can be considered to include four sets of racks: one set of server racks (A1), one set of functional racks (B1), one set of server racks (A2), and one set of functional racks (B2). Each set of racks includes at least one rack of the corresponding type; for example, a set of server racks includes at least one server rack, and a set of functional racks includes at least one functional rack.

[0045] In this embodiment, the first end of the rack module is a server rack sub-area (A1), and the second end is a functional rack sub-area (B2). That is, the first end of the rack module is a set of server racks, and the second end is a set of functional racks. In this embodiment, the functional racks placed in the functional rack sub-area (B1) located between the two server rack sub-areas (A1 and A2) include communication cabinets, storage cabinets, and air conditioning cabinets (to facilitate the display of the structure of the liquid storage tank connecting pipe below the racks,...). Figure 1 (The cabinets in functional cabinet sub-area B1 are omitted). The functional cabinets placed in the functional cabinet sub-area at the end of the cabinet module include fire cabinets and row cabinets. Placing communication cabinets, storage cabinets, and air conditioning cabinets between server cabinets can minimize the connection cables between server components in the server cabinet and the corresponding devices in the communication and storage cabinets, and can also improve the cooling effect of the air conditioning.

[0046] The server rack contains a closed or semi-closed enclosure (not shown) filled with coolant. Components to be cooled (such as server modules, batteries, and other heat-generating parts) are placed inside the enclosure and immersed in the coolant. The enclosure is directly or indirectly connected to the server rack's coolant inlet and the coolant return port of the coolant reservoir, allowing the coolant inside to circulate within the liquid cooling system's circulation piping and exchange heat.

[0047] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4The liquid cooling system of the embodiment includes a first liquid storage tank 1, a second liquid storage tank 2, a liquid storage tank communication pipe 3, a circulating pump group 4, a liquid inlet main pipe 5, a liquid return main pipe 6, a liquid inlet branch pipe 7, a liquid return branch pipe 8, a first pump group connecting pipe 9, and a second pump group connecting pipe 10. In a specific application, the liquid cooling system includes at least two liquid storage tanks, which collect the cooling liquid after heat exchange with the components to be cooled, and the liquid storage tanks are arranged at intervals along the arrangement direction of the cabinet. The liquid storage tanks are communicated through the communication ports and the communication structure on the liquid storage tanks. The communication structure of the embodiment is the liquid storage tank communication pipe 3, and the liquid storage tank is provided with a communication pipe interface as the communication port, which is docked with the liquid storage tank communication pipe. The sizes (i.e. volumes) of the liquid storage tanks can be equal or unequal. The circulating pump group 4 of the embodiment is a double pump group, which can be one main and one backup, or each can run at a full preset power, which is not limited here.

[0048] For convenience of description, the direction close to the circulating pump group is defined as front, and the direction away from the circulating pump group is defined as back. The cooling liquid flows from the back liquid storage tank to the front liquid storage tank. The cabinets in the cabinet module of the embodiment are arranged in rows or columns. The front is the direction close to the head end of the cabinet module, and the back is the direction close to the tail end of the cabinet module. Generally, one of the liquid storage tanks is closest to the circulating pump group among the multiple liquid storage tanks, but the following case is not excluded: the circulating pump group is arranged on the middle line between two adjacent liquid storage tanks, and the distance between the circulating pump group and the two liquid storage tanks is equal. At this time, any one of the two liquid storage tanks can be taken as the liquid storage tank closest to the circulating pump group, and the liquid storage tank closest to the circulating pump group is the front liquid storage tank.

[0049] Optionally, in the embodiment, the bottom surface of the liquid tank located at the front end of the cabinet module (the front liquid tank) is lower than the bottom surface of the liquid tank located at the rear end of the cabinet module (the rear liquid tank). Due to the height difference between the bottom surfaces of the liquid tanks, the cooling liquid in the rear liquid tank can flow to the front liquid tank naturally through the connecting structure (the liquid tank connecting pipe). The bottom surface of the liquid tank located at the front end of the cabinet module (the front liquid tank) is the lowest, the bottom surface of the liquid tank located at the rear end of the cabinet module (the rear liquid tank) is the highest, and the bottom surface of the liquid tank located between the front liquid tank and the rear liquid tank is higher than the bottom surface of the front liquid tank and lower than the bottom surface of the rear liquid tank. In this way, the cooling liquid can flow from the rear liquid tank to the front liquid tank naturally. In other embodiments, the bottom surfaces of the liquid tanks can be at the same height. The connecting port of the rear liquid tank is higher than the connecting port of the front liquid tank, and the liquid tank connecting pipe connecting the two connecting ports is inclined downward from the rear to the front. In this way, the cooling liquid can also flow from the rear liquid tank to the front liquid tank naturally. However, if the height of the connecting port of the rear liquid tank is too high, it is not conducive to the drainage of the cooling liquid in the liquid tank. Therefore, it is more conducive to the drainage of the cooling liquid in the liquid tank to set the height of the bottom surface of the rear liquid tank to be higher than the height of the bottom surface of the front liquid tank.

[0050] Since the cooling liquid is mainly used for heat dissipation of the heat-generating components (the components to be cooled) placed in the server cabinet, the liquid tank is preferably arranged below the server cabinet, which facilitates the connection of the pipeline. The liquid cooling system of the embodiment includes two liquid tanks: a first liquid tank 1 and a second liquid tank 2. The first liquid tank 1 is arranged below a group of server cabinets (A1) arranged in front, and the second liquid tank 2 is arranged below a group of server cabinets (A2) arranged at the rear. A functional cabinet (B1) is arranged between the two groups of server cabinets (A1 and A2). A liquid tank connecting pipe 3 connecting the first liquid tank 1 and the second liquid tank 2 is arranged below the functional cabinet (B1). No circulating pipeline of the liquid cooling system is arranged below a group of functional cabinets (B2) located at the rear end of the cabinet module. In other embodiments, when the cabinet module includes only one group of server cabinets and one group of functional cabinets, both the first liquid tank 1 and the second liquid tank 2 can be arranged below the group of server cabinets. In some cases, the cabinet module can include only server cabinets, and the liquid tanks are arranged below the server cabinets at intervals.

[0051] The circulating pump group 4 is located at one side of the cabinet module, and the first liquid storage tank 1 is the liquid storage tank closest to the circulating pump group 4, that is, the first liquid storage tank. The liquid outlet (not shown) of the circulating pump group 4 is connected to the liquid inlet main pipe 5 through the first pump group connecting pipe 9, and the liquid return port (not shown) is connected to the liquid return main pipe 6 through the second pump group connecting pipe 10. The liquid inlet main pipe 5 is connected to a plurality of liquid inlet branch pipes 7, and the liquid return main pipe 6 is connected to at least one liquid return branch pipe 8. The first liquid storage tank 1 is communicated with the liquid return main pipe 6 through the liquid return branch pipe 8. The number of the liquid inlet branch pipes 7 and the liquid return branch pipes 8 can be set according to requirements. For example, when the volume of the liquid storage tank is large, the number of the liquid inlet branch pipes 7 and the liquid return branch pipes 8 can be increased accordingly.

[0052] The server cabinet is provided with a liquid inlet branch pipe interface (not shown) for connecting with the liquid inlet branch pipe 7. In the embodiment, the cabinet liquid return interface a is arranged at the top of the first liquid storage tank 1 and the second liquid storage tank 2, and the cabinet liquid return interface a is communicated with the liquid return port of the server cabinet / tank body through a liquid return connecting pipe (not shown), so that the cooling liquid in the server cabinet / tank body can flow into the liquid storage tanks. The first liquid storage tank 1 is the first liquid storage tank, and the cooling liquid in the other liquid storage tanks is collected into the first liquid storage tank 1 through the liquid storage tank communication pipe and returned to the circulating pump group 4 through the first liquid storage tank 1, so that the first liquid storage tank 1 is defined as a collection liquid return tank. The first liquid storage tank 1 is provided with a liquid return branch pipe interface b for connecting with the liquid return branch pipe 8. Under the driving force of the circulating pump group 4, the cooling liquid enters the server cabinet through the liquid inlet main pipe 5 and the liquid inlet branch pipes 7, is injected into the tank body containing the heat generating components to be cooled, and then enters the first liquid storage tank 1 through the cabinet liquid return interface a after heat exchange, and finally enters the liquid return main pipe 6 through the liquid return branch pipe 8 and returns to the circulating pump group 4, so as to complete the liquid cooling circulation.

[0053] The plurality of liquid storage tanks communicated by the communication structure correspond to a communicating vessel. Under the action of the circulating pump group, the liquid level of the collection liquid storage tank will inevitably drive the liquid level of the other liquid storage tanks to drop, that is, under the action of the circulating pump group, the cooling liquid can flow in the liquid storage tanks in sequence through the communication structure. When the communication structure adopts the liquid storage tank communication pipe 3, the liquid storage tank communication pipe 3 is preferably connected to the lower part of the liquid storage tank, that is, the communication port on the liquid storage tank is located at the lower part of the liquid storage tank, as shown in FIG. 4. Figure 5a The liquid storage tank communication pipe 3 can also be connected to the middle or upper part of the liquid storage tank, as shown in FIG. 5 and FIG. 6. In this case, the liquid level in the liquid storage tank needs to be controlled to be higher than the communication port. Figure 5b

[0054] Optionally, the first liquid storage tank 1 is further provided with a total maintenance liquid discharge port c. The total maintenance liquid discharge port c is arranged at the bottom of the first liquid storage tank 1. Further, the liquid inlet main pipe 5 is provided with a liquid taking port e, and the liquid taking port e is provided with a liquid taking device, so as to realize the function of sampling and testing the quality of the cooling liquid.

[0055] ​Optionally, the height of the return liquid branch pipe interface b on the first liquid storage tank 1 is higher than the height of the interface (not shown) on the return liquid main pipe 6 connecting the return liquid branch pipe 8, so that the return liquid branch pipe 8 is arranged in a downward slope in the first direction (the first direction is from the first liquid storage tank to the return liquid main pipe). Thus, the cooling liquid in the first liquid storage tank 1 can flow naturally from the first liquid storage tank 1 to the return liquid main pipe 6 from top to bottom. In some embodiments, the height of the bottom surface of the first liquid storage tank 1 can be higher than the height of the return liquid main pipe 6, so that the height of the return liquid branch pipe interface b on the first liquid storage tank 1 is naturally higher than the height of the interface on the return liquid main pipe 6 connecting the return liquid branch pipe 8, and thus the cooling liquid can flow from top to bottom.

[0056] The embodiment only provides the return liquid branch pipe 7 on the first liquid storage tank 1 with the lowest bottom surface height and in communication with the return liquid main pipe 6, and the cooling liquid in the remaining liquid storage tanks is gathered into the first liquid storage tank 1 and then returned to the circulating pump set 4 via the first liquid storage tank 1, because the return flow in the area close to the circulating pump set in the entire cooling liquid circulation loop is greater than the return flow in the area far from the circulating pump set, and the return liquid main pipe 6 is only in communication with the first liquid storage tank 1 closest to the circulating pump set 4, which can avoid the problem of cavitation caused by air in the return liquid, and the cooling liquid in the remaining liquid storage tanks only needs to be gathered into the first liquid storage tank 1 in sequence through the liquid storage tank communication pipes 3 and then returned to the circulating pump set 4.

[0057] The two adjacent liquid storage tanks are in communication through the liquid storage tank communication pipes 3, and each liquid storage tank is provided with a communication pipe interface d that is in butt joint with the liquid storage tank communication pipe 3. Optionally, the height of the communication pipe interface d of the front liquid storage tank is lower than the height of the communication pipe interface of the rear liquid storage tank among the two adjacent liquid storage tanks connected by the same liquid storage tank communication pipe, so that the liquid storage tank communication pipe 3 is arranged in a downward slope in the second direction (the second direction is from the rear liquid storage tank to the front liquid storage tank, i.e. from rear to front). By arranging the liquid storage tank communication pipe in a downward slope from rear to front, the cooling liquid can flow into the front liquid storage tank from the rear liquid storage tank, and the cooling liquid in the liquid storage tank communication pipe 3 can also flow naturally into the front liquid storage tank.

[0058] Further optionally, the return liquid main pipe 6 is also arranged in a downward slope in the second direction, i.e. from the tail end of the return liquid main pipe to the side of the circulating pump set, so that the cooling liquid in the return liquid main pipe 6 can flow naturally to the circulating pump set 4.

[0059] Furthermore, the liquid level height in the first liquid storage tank 1 is higher than the height of the return liquid port of the circulating pump set 4, and the difference in liquid level height is used to ensure the normal and stable operation of the circulating pump set. In particular, the arrangement of the liquid storage tank communication pipe, the return liquid branch pipe and the return liquid main pipe in a downward slope ensures that there is no air in the pump set return liquid section and the circulating pump set is in an immersed state, thereby solving the problem of air mixed into the flow path of the pump set.

[0060] The circulating pump group of the embodiment adopts a centrifugal pump. In other embodiments, a gear pump, a peristaltic pump, etc. can also be adopted. However, the gear pump has large vibration and noise, and the peristaltic pump has small volume flow and limited suction range. In summary, the centrifugal pump has moderate volume, small noise, and more suitable flow and head performance, and is therefore preferably adopted.

[0061] The embodiment sets the liquid storage tank below the server cabinet. The cooling liquid in the cabinet can flow into the liquid storage tank through a short path. If the server cabinet is also set above the liquid storage tank communication pipe, a longer liquid return connecting pipe needs to be set to connect the liquid storage tank and the server cabinet, and the structure is more complex, and the liquid flow is not easy to control. Therefore, the server cabinet is preferably set above the liquid storage tank, and the functional cabinet is set above the liquid storage tank communication pipe. The components placed in the functional cabinet have relatively small heat dissipation requirements, and can not be cooled by liquid cooling, and do not need to be set with a pipe connected to the liquid storage tank.

[0062] The embodiment sets the liquid inlet main pipe 5 and the liquid return main pipe 6 on the pipeline support 11 and supports them by the pipeline support 11. As shown in Figure 6 The pipeline support 11 of the embodiment includes a pair of stands 11-1 and two layers of supporting arms 11-2. The two stands 11-1 are oppositely arranged, and the supporting arms 11-2 are installed on the stands 11-1 to form the support body of the pipeline. Optionally, the liquid inlet main pipe 5 is supported by the upper supporting arm 11-2, and the liquid return main pipe 6 is supported by the lower supporting arm 11-2. The liquid inlet main pipe 5 is above, and the liquid return main pipe 6 is below, which can make the structure more compact.

[0063] Optionally, a plurality of mounting holes 11-1a are formed in the vertical direction on the stand 11-1. The mounting hole 11-1a is the mounting position of the supporting arm 11-2 on the support 11-1. The supporting arm 11-2 is fixed with the stand 11-1 through the cooperation of the threaded fastener and the mounting hole 11-1a. The plurality of mounting holes with different heights can adjust the installation height of the supporting arm 11-2, so as to adjust the levelness of the liquid return main pipe 6, and ensure that the cooling liquid in the pipeline can effectively flow back to the circulating pump group 4 from the tail end, which can overcome the influence of the terrain level difference on the operation of the liquid cooling system to a certain extent. In some embodiments, the mounting hole can also be a slot gap.

[0064] In order to ensure uniform liquid return, the liquid storage tank is provided with a plurality of cabinet liquid return interfaces a. These cabinet liquid return interfaces a can be arranged at intervals along the length direction of the liquid storage tank (the direction parallel to the second direction). One or more rows of cabinet liquid return interfaces a can be provided. The liquid return branch pipe interfaces b provided on the side surface of the first liquid storage tank can also be a plurality of and arranged at intervals along the length direction of the first liquid storage tank to ensure uniform liquid return of the first liquid storage tank.

[0065] This embodiment of the liquid cooling system uses at least two spaced-apart liquid storage tanks connected by a connecting pipe. These tanks form a large liquid storage device, reducing the amount of coolant used and thus lowering costs. If a single large liquid storage tank covering the entire length of the server rack is used, a large amount of coolant must be injected to maintain a specific liquid level in the large tank to prevent air from entering the pump assembly and flowing into the pump channels, resulting in high costs. This invention uses multiple spaced-apart "small" liquid storage tanks, breaking down the large tank into at least two relatively smaller tanks connected by a connecting pipe. This effectively reduces the volume of the tanks (the coolant volume in the connecting pipe replaces the original coolant volume in the tank at the location of the connecting pipe), thus reducing coolant usage and lowering costs. The number and cross-sectional area of ​​the connecting pipes between adjacent tanks can be adjusted according to requirements.

[0066] In some embodiments, a ventilated structure is provided on the top of the liquid storage tank. The ventilated structure can be a vent hole or a vent gap. For example... Figure 7 As shown, the venting structure is a venting gap. The liquid storage tank includes a tank body Q1 and a top cover Q2. A support structure Q3 is provided between the tank body Q1 and the top cover Q2, forming a venting gap Q4 between the tank body Q1 and the top cover Q2 through the support structure Q3. When the venting structure is a vent hole, the vent hole can be machined on the upper part of the side wall of the tank body or on the top cover.

[0067] Example 2

[0068] The immersion cooling cabinet module of this embodiment includes at least one set of server cabinets. For example... Figure 8 As shown, multiple enclosures 1-1 are arranged inside the server rack 1, and server components 100 to be cooled are placed inside the enclosures 1-1. In this embodiment, the enclosures 1-1 are closed enclosures with non-open tops. Each enclosure 1-1 is connected to an inlet pipe 1-2 and a return pipe 1-3. Coolant enters the enclosure 1-1 through the inlet pipe 1-2 and dissipates heat from the server components 100 by overflow. The overflow method means that the inlet of the enclosure 1-1 is at the bottom and the return of the coolant is at the top. In this embodiment, the height of the outlet end of the inlet pipe 1-2 is lower than the height of the inlet end of the return pipe 1-3, that is, the inlet pipe 1-2 is connected to the lower part of the enclosure 1-1, and the return pipe 1-3 is connected to the upper part of the enclosure 1-1. A one-way valve 1-7 is provided on the inlet pipe 1-2 to prevent backflow and prevent coolant from flowing back through the inlet pipe 1-2.

[0069] In this embodiment, the return pipe 1-3 of the housing 1-1 is connected to the storage tank 200 through the return connection pipe 1-5. The inlet pipe 1-2 of each housing 1-1 is connected to the inlet connection pipe 1-4, which is directly or indirectly connected to the main inlet pipe (circulation pump group), so that the coolant can be injected into the housing 1-1 under the drive of the circulation pump group.

[0070] Each enclosure 1-1 in this embodiment is connected to two return pipes 1-3. The inlet ends of the two return pipes 1-3 are connected to the upper part of the enclosure 1-1, and the inlet ends of the two return pipes 1-3 are at different heights, that is, the inlet end of one return pipe 1-3 is higher than the inlet end of the other return pipe 1-3. The two return pipes 1-3 on the same enclosure 1-1 are respectively connected to two independent return connection pipes 1-5, and the two return connection pipes 1-5 are connected to the liquid storage tank 200. The return connection pipes 1-5 are the connecting pipes between the liquid storage tank and the server rack / enclosure. The liquid storage tank 200 can be multiple liquid storage tanks connected by liquid storage tank connection pipes as described in the previous embodiment, or it can be a single large liquid storage tank. A first liquid level sensor (not shown) is installed inside the liquid storage tank 200.

[0071] Compared to having only one return liquid connection pipe, this embodiment uses two return liquid connection pipes. The tank 1-1 is connected to the storage tank 200 via two return liquid pipes 1-3 and two return liquid connection pipes 1-5, which reduces the risk of liquid blockage. A second liquid level sensor (not shown) is installed inside the tank 1-1. In specific applications, the first and second liquid level sensors can be float-type liquid level sensors.

[0072] Example 3

[0073] like Figure 9 As shown, the difference between this embodiment and Embodiment 2 is that the housing 1-1 is connected to only one return pipe 1-3, which is simultaneously connected to two return connection pipes 1-5. A pipeline control valve 1-6 is installed between the connection points of the return pipe 1-3 and the two return connection pipes 1-5. In this embodiment, the pipeline control valve 1-6 is a solenoid valve. The pipeline control valve 1-6 controls whether the return pipe 1-3 is connected to only one return connection pipe or to both return connection pipes simultaneously. The pipeline control valve 1-6 can be opened when needed to allow both return connection pipes 1-5 to be open.

[0074] Example 4

[0075] like Figure 10As shown, the difference between this embodiment and Embodiment 2 is that the enclosure 1-1 located inside the server rack 1 is a semi-enclosed enclosure with an open top. Enclosure 1 is not connected to a return coolant pipe. When the coolant in enclosure 1-1 is full, the coolant can overflow from the open top of enclosure 1-1 and flow into the server rack 1. The server rack 1 is connected to the coolant storage tank 200 via two return coolant connection pipes 1-5, and the height of the inlet end of one return coolant connection pipe 1-5 (the end connected to the server rack 1) is higher than the height of the inlet end of the other return coolant connection pipe 1-5. Figure 8 As shown in the example, the height of the inlet end of the return liquid connection pipe 1-5 on the left is higher than the height of the inlet end of the return liquid connection pipe 1-5 on the right.

[0076] In this embodiment, the outlet end of the inlet pipe 1-2 extends downward from the top of the housing 1-1 to the bottom of the housing 1-1. Raising the inlet pipe 1-2 prevents backflow, while extending downward from the outlet end to the bottom of the housing 1-1 allows for overflow heat dissipation with the inlet at the bottom and the return liquid at the top. In this embodiment, a second liquid level sensor (not shown) is installed inside the server rack 1.

[0077] Example 5

[0078] like Figure 11 As shown, the difference between this embodiment and embodiment 4 is that in this embodiment, the inlet pipe 1-2 is connected to the bottom of the housing 1-1, and a one-way valve 1-7 for preventing backflow is installed on the inlet pipe 1-2. The inlet ends of the two return pipes 1-5 connected to the server rack 1 are at the same height, and a pipeline control valve 1-6 is installed on one of the return pipes 1-5. The pipeline control valve 1-6 controls whether one return pipe is open or both return pipes are open simultaneously.

[0079] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An immersion liquid cooling system for use in cabinet modules, characterized in that, include: The system includes a circulating pump set, at least two spaced-apart storage tanks, an inlet manifold connected to the outlet of the circulating pump set, and a return manifold connected to the return outlet of the circulating pump set. The storage tanks are arranged in sequence, and the circulating pump set is located on one side of the sequentially arranged storage tanks. The storage tank closest to the circulating pump set is a centralized return tank. The main inlet pipe delivers coolant to the component to be cooled via inlet branch pipes. The liquid storage tank collects the coolant after heat exchange with the component to be cooled. The main return pipe is connected to the centralized return tank via return branch pipes. The two adjacent liquid storage tanks are connected by corresponding communication ports and communication structures; Under the action of the circulating pump group, the connecting structure is used to transfer the coolant in the subsequent storage tank to the previous storage tank.

2. The immersion liquid cooling system as described in claim 1, characterized in that: In two adjacent liquid storage tanks, the bottom surface of the first liquid storage tank is lower than that of the second liquid storage tank, and the bottom surface of the centralized return tank is the lowest.

3. The immersion liquid cooling system as described in claim 1, characterized in that: The connection port is located at the bottom of the side wall of the liquid storage tank.

4. The immersion liquid cooling system as described in claim 1, characterized in that: The upper part of the liquid storage tank has a breathable structure.

5. The immersion liquid cooling system as described in claim 1, characterized in that: The liquid level in the centralized return tank is higher than the height of the return port of the circulating pump unit.

6. The immersion liquid cooling system as described in claim 1, characterized in that: The return branch pipe is inclined downwards in the first direction.

7. The immersion liquid cooling system as described in claim 1, characterized in that: The connecting structure is a liquid storage tank connecting pipe, and the liquid storage tank connecting pipe connecting two adjacent liquid storage tanks is inclined downward in the second direction.

8. The immersion liquid cooling system as described in claim 1, characterized in that: The return manifold is inclined downwards in the second direction.

9. The immersion liquid cooling system as described in claim 1, characterized in that: It also includes a pipeline support for supporting the inlet manifold and the return manifold. The pipeline support includes a pair of uprights and upper and lower support arms mounted on the uprights. The inlet manifold is supported by the upper support arm, and the return manifold is supported by the lower support arm.

10. The immersion liquid cooling system as described in claim 9, characterized in that: The support frame has multiple mounting positions, and the support arm is located at one of the mounting positions.

11. An immersion liquid-cooled cabinet module, characterized in that, It includes at least one set of server racks and an immersion liquid cooling system as described in any one of claims 1 to 10, wherein the liquid storage tank is disposed below the server racks.

12. The immersion liquid-cooled cabinet module as described in claim 11, characterized in that: It also includes at least one set of functional cabinets, which include at least one of communication cabinets, storage cabinets, air conditioning cabinets, fire protection cabinets, and column cabinets.

13. The immersion liquid-cooled cabinet module as described in claim 12, characterized in that: The functional cabinet is installed above the liquid storage tank connecting pipe that connects the adjacent liquid storage tanks.

14. The immersion liquid-cooled cabinet module as described in claim 11, characterized in that: The server rack is equipped with a cabinet containing coolant. The cabinet is either enclosed or semi-enclosed and dissipates heat through overflow.

15. The immersion liquid-cooled cabinet module as described in claim 14, characterized in that: The box is a closed box, and each box is connected to one inlet pipe and two return pipes. The two return pipes are connected to the storage tank through independent return connection pipes, and the inlet heights of the two return pipes are different. A first liquid level sensor is installed inside the liquid storage tank, and a second liquid level sensor is installed inside the tank.

16. The immersion liquid-cooled cabinet module as described in claim 14, characterized in that: The box is a closed box, and each box is connected to a liquid inlet pipe and a liquid return pipe. The liquid return pipe is connected to two independent liquid return connection pipes. The other end of the liquid return connection pipe is connected to the liquid storage tank. A pipeline control valve is provided between the connection point of the liquid return pipe and the two liquid return connection pipes. A first liquid level sensor is installed inside the liquid storage tank, and a second liquid level sensor is installed inside the tank.

17. The immersion liquid-cooled cabinet module as described in claim 14, characterized in that: The enclosure is a semi-enclosed enclosure with an open top. The server racks are connected to the liquid storage tank through independent return liquid connection pipes, and the inlet heights of the two return liquid connection pipes are different. A first liquid level sensor is installed inside the liquid storage tank, and a second liquid level sensor is installed inside the server rack.

18. The immersion liquid-cooled cabinet module as described in claim 14, characterized in that: The enclosure is a semi-enclosed enclosure with an open top. The server racks are connected to the liquid storage tank through independent return liquid connection pipes, and one of the return liquid connection pipes is equipped with a pipeline control valve. A first liquid level sensor is installed inside the liquid storage tank, and a second liquid level sensor is installed inside the server rack.

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