Liquid-cooling system

Abstract

Provided in the embodiments of the present disclosure is a liquid-cooling system, comprising: a first negative pressure chamber, which can receive a cooling liquid returned from a cabinet, wherein a first negative pressure control pipeline is provided on the first negative pressure chamber, and the first negative pressure control pipeline can adjust the pressure in the first negative pressure chamber to be lower than atmospheric pressure; and a fault-tolerant control chamber, which is connected to the first negative pressure chamber by means of a first connection pipeline, wherein a fault-tolerant control pipeline, a gas guide pipeline and a liquid-discharging pipeline are provided on the fault-tolerant control chamber; when the height of the liquid level of the cooling liquid in the first negative pressure chamber is higher than a first preset threshold value, the fault-tolerant control pipeline can adjust the internal pressure of the fault-tolerant control chamber to be lower than the pressure in the first negative pressure chamber, such that when the first connection pipeline is connected, the cooling liquid in the first negative pressure chamber flows into the fault-tolerant control chamber; and when the gas guide pipeline and the liquid-discharging pipeline are connected, the cooling liquid in the fault-tolerant control chamber can be discharged out of the fault-tolerant control chamber via the liquid-discharging pipeline.

Description

Liquid cooling system

[0001] This application claims priority to the Chinese invention patent application entitled “Liquid Cooling System” and application number 202311800013.2 filed on December 25, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] Embodiments of the present disclosure generally relate to the field of equipment cooling technology, and more particularly, to a liquid cooling system. Background Art

[0003] Cold plate liquid cooling solutions are widely used to cool electronic equipment in cabinets. However, when cracks appear in the pipes or cavities of the cold plate system, the coolant may leak through the cracks, posing a risk of damage to the electronic equipment. The coolant in conventional cold plate systems is usually operated under medium- and high-pressure conditions. The higher the internal pressure, the higher the risk of coolant leakage. To reduce the risk of coolant leakage, it is necessary to control the liquid supply pressure of the cold distribution unit (CDU), strictly control all connection processes in the cold plate system, and install leak detection ropes in the data center computer room and servers. These measures make the production and operation and maintenance costs of the liquid cooling system high, and there is still a risk of coolant leakage. Summary of the Invention

[0004] In one aspect of the present disclosure, a liquid cooling system is provided, comprising: a first negative pressure chamber, capable of receiving cooling liquid returned from a cabinet, the first negative pressure chamber being provided with a first negative pressure control pipeline, the first negative pressure control pipeline being capable of adjusting the pressure in the first negative pressure chamber to be lower than atmospheric pressure; and a fault-tolerant control chamber, connected to the first negative pressure chamber via a first connecting pipeline, the fault-tolerant control chamber being provided with a fault-tolerant control pipeline, an air guide pipeline and a drain pipeline, the fault-tolerant control pipeline being capable of adjusting the internal pressure of the fault-tolerant control chamber to be lower than the pressure in the first negative pressure chamber when the liquid level of the cooling liquid in the first negative pressure chamber is higher than a first predetermined threshold, so that the cooling liquid in the first negative pressure chamber flows into the fault-tolerant control chamber when the first connecting pipeline is connected, wherein when the air guide pipeline and the drain pipeline are connected, the cooling liquid in the fault-tolerant control chamber can be discharged to the outside of the fault-tolerant control chamber via the drain pipeline.

[0005] It should be understood that the content described in this content section is not intended to limit the key features or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0007] 1 and 2 are schematic diagrams showing partial structures of liquid cooling systems according to some embodiments of the present disclosure; and

[0008] 3 and 4 are schematic structural diagrams of a fault-tolerant control cavity according to some embodiments of the present disclosure.

[0009] Description of reference numerals:

[0010] 100 liquid cooling system;

[0011] 11. first negative pressure chamber;

[0012] 110 liquid level;

[0013] 111 first negative pressure control line;

[0014] 12 second negative pressure chamber;

[0015] 121 second negative pressure control line;

[0016] 20 fault-tolerant control cavity;

[0017] 201 Part I;

[0018] 202 Part II;

[0019] 211 first connecting pipeline;

[0020] 212 second connecting pipeline;

[0021] 22. Fault-tolerant control pipeline;

[0022] 23 airway;

[0023] 24 drain line;

[0024] 25 isolation units;

[0025] 26 Liquid injection port;

[0026] 31 first valve;

[0027] 32 second valve;

[0028] 33 third valve;

[0029] 34 fourth valve;

[0030] 35 Fifth valve. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0032] As used herein, the term "including" and its variations represent open inclusion, i.e., "including but not limited to." Unless otherwise stated, the term "or" means "and / or." The term "based on" means "based at least in part on." The terms "one example embodiment" and "an embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one additional embodiment." The terms "first," "second," etc. may refer to different or identical objects.

[0033] As mentioned above, in conventional cold plate liquid cooling systems, in order to reduce the risk of coolant leakage, it is necessary to control the liquid supply pressure of the cooling distribution unit, strictly control all connection processes in the cold plate system, and install leak detection ropes inside the data center computer room and servers. These measures make the production and operation and maintenance costs of the liquid cooling system high, and there is still a risk of coolant leakage.

[0034] An embodiment of the present disclosure provides a liquid cooling system, in which a negative pressure cavity is provided. A vacuum pump can be used to generate a certain degree of vacuum in the negative pressure cavity, so that the liquid cooling system is partially or completely in a negative pressure environment. Since the interior of the liquid cooling system is in a negative pressure environment, its pressure is lower than atmospheric pressure. Therefore, when the liquid cooling system is partially damaged, the coolant will not leak out from the damaged area. On the contrary, external air will be sucked into the liquid cooling system at the damaged area. The air will reach a certain cavity in the form of bubbles as the coolant circulates, and will be discharged from the liquid cooling system under the degassing action of the vacuum pump. In this way, liquid leakage caused by local leakage can be avoided.

[0035] However, if the liquid cooling system is severely damaged or multiple cabinets are disconnected from the system, a large amount of coolant may be sucked back into the negative pressure chamber due to negative pressure. The negative pressure chamber generally contains liquid at the bottom and an air cavity at the top. When too much liquid is sucked back, the liquid level in the negative pressure chamber rises. If the air cavity is full, the vacuum pump will be unable to maintain a sufficient vacuum level in the negative pressure chamber, causing the negative pressure environment of the liquid cooling system to fail. This can cause the entire negative pressure liquid cooling system to cease normal operation, resulting in serious failure.

[0036] Because the negative pressure liquid cooling system has a negative pressure environment inside, when there is too much liquid in the negative pressure chamber, it cannot be simply discharged through the drain valve before the vacuum control fails. At the same time, the pressure stabilization system of the positive pressure liquid cooling system cannot be used. During design, the negative pressure liquid cooling system can increase the fault tolerance of the system in the event of leakage by increasing the volume of the negative pressure chamber. However, due to space constraints, this fault tolerance is very limited and is only limited to smaller-scale leaks. When a larger-scale leak occurs or simply a large number of servers or cabinets are withdrawn, the fault tolerance limit will be reached, resulting in serious systemic failure.

[0037] Therefore, how to design a leakage-tolerant structure for the negative pressure liquid cooling system to avoid short-term failure of the negative pressure liquid cooling system due to a high degree of damage or disconnection of multiple cabinets from the liquid cooling system is crucial to the stability of the negative pressure system, especially the reliability of the negative pressure liquid cooling system deployed on a large scale. The embodiment of the present disclosure proposes a leakage-tolerant negative pressure liquid cooling system, in which a fault-tolerant control cavity is provided for the negative pressure cavity. When more cabinets are withdrawn or more serious damage occurs, the excess cooling liquid returned to the negative pressure cavity can flow into the fault-tolerant control cavity, and then be discharged from the fault-tolerant control cavity to the outside of the liquid cooling system, thereby avoiding the problem of failure of the negative pressure environment inside the liquid cooling system. The principle of the present disclosure will be described below in conjunction with Figures 1 to 4.

[0038] Figure 1 shows a partial structural schematic diagram of a liquid cooling system 100 according to some embodiments of the present disclosure. As shown in Figure 1, the liquid cooling system 100 described herein generally includes a first negative pressure chamber 11 and a fault-tolerant control chamber 20. The first negative pressure chamber 11 is connected to the fault-tolerant control chamber 20 via a first connecting pipe 211. The first negative pressure chamber 11 is capable of receiving cooling liquid returned from a cabinet, for example. In an embodiment of the present disclosure, the cooling liquid can be water or any other available type, and the scope of the present disclosure is not limited in this respect. When there is too much cooling liquid in the first negative pressure chamber 11, the excess cooling liquid can flow into the fault-tolerant control chamber 20 via the first connecting pipe 211, and then be discharged from the fault-tolerant control chamber 20 to the outside of the liquid cooling system 100, thereby avoiding the problem of failure of the negative pressure environment inside the liquid cooling system 100.

[0039] As shown in FIG1 , the first negative pressure chamber 11 is provided with a first negative pressure control line 111. Driven by a negative pressure regulating device such as a vacuum pump, the first negative pressure control line 111 can regulate the pressure within the first negative pressure chamber 11 to below atmospheric pressure, providing a certain level of vacuum. By way of example, the pressure within the first negative pressure chamber 11 can be below 50 kilopascals (kPa). It should be understood that the pressure within the first negative pressure chamber 11 can be any suitable value below atmospheric pressure, and the scope of this disclosure is not limited thereto.

[0040] As shown in Figure 1, the coolant in the first negative pressure chamber 11 has a page 110. Below the page 110 is the coolant, and above the page 110 is the gas space. During the stable operation of the liquid cooling system 100, the page 110 can be basically stable or can float within a certain range. Driven by the negative pressure regulating device, part of the gas in the gas space can be sucked out of the gas space through the first negative pressure control pipeline 111, so that the gas space has a certain vacuum degree, forming a negative pressure environment, so that the pressure in the first negative pressure chamber 11 is lower than the atmospheric pressure.

[0041] It should be understood that, in addition to the vacuum pump, the negative pressure regulating device may include, for example, any known or future available regulating device for forming a negative pressure environment in the first negative pressure chamber 11 via the first negative pressure control line 111 .

[0042] In some embodiments, as shown in FIG1 , the fault-tolerant control chamber 20 is provided with a fault-tolerant control line 22, an air line 23, and a drain line 24. The fault-tolerant control line 22 is capable of regulating the internal pressure of the fault-tolerant control chamber 20 to be lower than the pressure within the first negative pressure chamber 11 when the coolant level 110 within the first negative pressure chamber 11 exceeds a first predetermined threshold. The pressure difference between the first negative pressure chamber 11 and the fault-tolerant control chamber 20 causes the coolant within the first negative pressure chamber 11 to flow into the fault-tolerant control chamber 20 when the first connecting line 211 is open. When the coolant level in the fault-tolerant control chamber 20 reaches a certain level, the first connecting line 211 and the fault-tolerant control line 22 can be disconnected, and the air line 23 and the drain line 24 can be connected. In this case, the coolant within the fault-tolerant control chamber 20 can be discharged to the outside of the fault-tolerant control chamber 20, for example, to the outdoor environment, via the drain line 24.

[0043] In an embodiment of the present disclosure, the first predetermined threshold value can be set as needed to prevent the liquid level 110 of the coolant in the first negative pressure chamber 11 from being too high. As an example, the first predetermined threshold value can be set to a predetermined ratio of the height of the first negative pressure chamber 11, such as 65%, 70%, 75%, 80%, 85% of the height of the first negative pressure chamber 11, or a higher or lower height.

[0044] In some embodiments, as shown in FIG1 , a first valve 31 is provided on the first connecting line 211, a second valve 32 is provided on the fault-tolerant control line 22, a third valve 33 is provided on the air guide line 23, and a fourth valve 34 is provided on the liquid discharge line 24. Each of the first valve 31, the second valve 32, the third valve 33, and the fourth valve 34 can be switched between an open state and a closed state to switch the corresponding line between a conducting state and a disconnected state. In some embodiments, the first valve 31, the second valve 32, the third valve 33, and the fourth valve 34 can be electronic valves. However, it should be understood that the first valve 31, the second valve 32, the third valve 33, and the fourth valve 34 can be any known or future available valves, and the embodiments of the present disclosure are not limited thereto.

[0045] In some embodiments, as shown in FIG1 , when the coolant level 110 in the first negative pressure chamber 11 is higher than a first predetermined threshold and the internal pressure of the fault-tolerant control chamber 20 is higher than the pressure in the first negative pressure chamber 11, the second valve 32 is opened, and the first valve 31, the third valve 33, and the fourth valve 34 are closed, so that the fault-tolerant control line 22 is connected and the first connecting line 211, the air guide line 23, and the liquid discharge line 24 are disconnected. In this case, a negative pressure regulating device such as a vacuum pump can be used to regulate the internal pressure of the fault-tolerant control chamber 20 to be lower than the pressure in the first negative pressure chamber 11.

[0046] In some embodiments, as shown in FIG1 , when the internal pressure of the fault-tolerant control chamber 20 is adjusted to be lower than the pressure in the first negative pressure chamber 11, the first valve 31 and the second valve 32 are opened, and the third valve 33 and the fourth valve 34 are closed, so that the fault-tolerant control line 22 and the first connecting line 211 are connected, while the air guide line 23 and the liquid discharge line 24 are disconnected. In this case, the pressure difference between the first negative pressure chamber 11 and the fault-tolerant control chamber 20 will cause the coolant in the first negative pressure chamber 11 to flow into the fault-tolerant control chamber 20 via the first connecting line 211, thereby lowering the height of the liquid level 110 in the first negative pressure chamber 11.

[0047] In some embodiments, as shown in FIG1 , when the coolant level in the fault-tolerant control chamber 20 exceeds a first predetermined level, the first valve 31 and the second valve 32 are closed, and the third valve 33 and the fourth valve 34 are opened, disconnecting the fault-tolerant control line 22 from the first connecting line 211 while connecting the air guide line 23 and the drain line 24. In this case, the fault-tolerant control chamber 20 can be restored to atmospheric pressure, allowing the coolant in the fault-tolerant control chamber 20 to be discharged outside the fault-tolerant control chamber 20, for example, to the outdoor environment, via the drain line 24. The first predetermined level can be set as desired. For example, the first predetermined level can be set to the level at which the fault-tolerant control chamber 20 is fully or nearly fully filled with coolant. Of course, the first predetermined level can also be set to the level at which the fault-tolerant control chamber 20 is filled with coolant to other positions, such as 70%, 75%, 80%, 85%, 90%, or a higher or lower percentage.

[0048] In some embodiments, as shown in FIG1 , when the coolant in the fault-tolerant control chamber 20 is drained to a level below the second predetermined level and the coolant level 110 in the first negative pressure chamber 11 is above the first predetermined threshold, the second valve 32 is opened, and the first valve 31, the third valve 33, and the fourth valve 34 are closed, thereby connecting the fault-tolerant control line 22 and disconnecting the first connecting line 211, the air guide line 23, and the liquid discharge line 24. In this case, a negative pressure regulating device such as a vacuum pump can be used again to adjust the internal pressure of the fault-tolerant control chamber 20 to a level lower than the pressure in the first negative pressure chamber 11. Subsequently, the process described above can be repeated to drain the coolant in the first negative pressure chamber 11 into the fault-tolerant control chamber 20 again, and then drain the coolant in the fault-tolerant control chamber 20 to the outside of the fault-tolerant control chamber 20.

[0049] The second predetermined liquid level is lower than the first predetermined liquid level and can be set as needed. For example, the second predetermined liquid level can be set to the level at which the coolant in the fault-tolerant control chamber 20 is completely or substantially completely drained. Of course, the second predetermined liquid level can also be set to the level at which the coolant in the fault-tolerant control chamber 20 is drained to other locations, such as 5%, 10%, 15%, or a higher or lower ratio.

[0050] According to an embodiment of the present disclosure, when a large number of cabinets are disconnected from the liquid cooling system 100 or serious damage occurs in the liquid cooling system 100, the excess cooling liquid returned to the first negative pressure chamber 11 can flow into the fault-tolerant control chamber 20, and then be discharged from the fault-tolerant control chamber 20 to the outside of the liquid cooling system 100, thereby avoiding vacuum failure of the first negative pressure chamber 11.

[0051] It should be understood that, in addition to the first negative pressure chamber 11 and the fault-tolerant control chamber 20, the liquid cooling system 100 also includes other components and pipelines, such as a heat exchanger, a circulation pump and a filter, etc. The working principles of these components will not be described in detail here.

[0052] FIG2 illustrates a partial schematic diagram of the structure of a liquid cooling system 100 according to another embodiment of the present disclosure. The structure of the liquid cooling system 100 shown in FIG2 is similar to that of the liquid cooling system 100 shown in FIG1 . The following description will focus on the differences between the two systems, and will omit any redundant description of the common components.

[0053] In some embodiments, as shown in FIG2 , the liquid cooling system 100 further includes a second negative pressure chamber 12 capable of receiving coolant returned from the cabinet. Similar to the first negative pressure chamber 11 , the second negative pressure chamber 12 is provided with a second negative pressure control line 121 . The second negative pressure control line 121 is capable of regulating the pressure within the second negative pressure chamber 12 to below atmospheric pressure. The second negative pressure chamber 12 is connected to the fault-tolerant control chamber 20 via a second connecting line 212 . A fifth valve 35 is provided on the second connecting line 212 , capable of switching between an open and closed state, thereby switching the second connecting line 212 between a conductive and a disconnected state. With this arrangement, when the coolant level 110 in the second negative pressure chamber 12 is too high, the fifth valve 35 can be opened, discharging the coolant from the second negative pressure chamber 12 into the fault-tolerant control chamber 20 , thereby preventing failure of vacuum control in the second negative pressure chamber 12 .

[0054] In some embodiments, instead of a common fault-tolerant control chamber 20, separate fault-tolerant control chambers 20 may be provided for the first negative pressure chamber 11 and the second negative pressure chamber 12. In this case, the first negative pressure chamber 11 and the second negative pressure chamber 12 can be controlled by the corresponding fault-tolerant control chambers 20 to prevent the liquid level 110 from being too high.

[0055] In some embodiments, in addition to the first negative pressure chamber 11 and the second negative pressure chamber 12, the liquid cooling system 100 may also include more negative pressure chambers, which may be connected to a common fault-tolerant control chamber 20 via corresponding connecting pipes, or respectively connected to separate fault-tolerant control chambers 20.

[0056] FIG3 illustrates a schematic diagram of the structure of a fault-tolerant control chamber 20 according to some embodiments of the present disclosure. The structure of the fault-tolerant control chamber 20 shown in FIG3 is similar to the structure of the fault-tolerant control chamber 20 in the liquid cooling system 100 shown in FIG1 . The following description will focus on the differences between the two, and will omit any redundant descriptions of the common features.

[0057] In some cases, when the liquid level 110 in the first negative pressure chamber 11 is abnormally low, the fault-tolerant control chamber 20 can also serve as an active correction method for the abnormal liquid level. Specifically, when the liquid level 110 of the coolant in the first negative pressure chamber 11 is below a second predetermined threshold, the fault-tolerant control line 22 can adjust the internal pressure of the fault-tolerant control chamber 20 to be higher than the pressure in the first negative pressure chamber 11, so that the coolant in the fault-tolerant control chamber 20 flows into the first negative pressure chamber 11 when the first connecting line 211 is open. When the liquid level 110 in the first negative pressure chamber 11 is too low, the internal pressure level of the fault-tolerant control chamber 20 can be adjusted to a higher level, higher than the pressure in the first negative pressure chamber 11. As an example, the pressure in the fault-tolerant control chamber 20 can be increased via the fault-tolerant control line 22, or the fault-tolerant control chamber 20 can be vented to the atmosphere.

[0058] In an embodiment of the present disclosure, the second predetermined threshold value can be set as needed to prevent the liquid level 110 of the coolant in the first negative pressure chamber 11 from being too low. As an example, the second predetermined threshold value can be set to a predetermined ratio of the height of the first negative pressure chamber 11, such as 5%, 10%, 15%, 20% of the height of the first negative pressure chamber 11, or a higher or lower height.

[0059] In some embodiments, as shown in FIG3 , the second valve 32 and the fourth valve 34 can be closed, while the first valve 31 and the third valve 33 are opened, so that the first connecting line 211 and the air guide line 23 are connected, while the fault-tolerant control line 22 and the drain line 24 are disconnected. In this case, the fault-tolerant control chamber 20 can directly inject coolant into the first negative pressure chamber 11. In this way, the coolant level 110 in the first negative pressure chamber 11 can be prevented from falling too low.

[0060] In some embodiments, as shown in FIG3 , the fault-tolerant control chamber 20 is further provided with a liquid injection port 26 for adding additional coolant to the fault-tolerant control chamber 20. Since the liquid injection port 26 provided on the fault-tolerant control chamber 20 is connected to the internal negative pressure environment, it can automatically draw in external liquid to achieve liquid replenishment of the liquid cooling system 100.

[0061] FIG4 illustrates a schematic structural diagram of a fault-tolerant control chamber 20 according to some embodiments of the present disclosure. The structure of the fault-tolerant control chamber 20 shown in FIG4 is similar to the structure of the fault-tolerant control chamber 20 in the liquid cooling system 100 shown in FIG1 . The following description will focus on the differences between the two, and will omit any redundant descriptions of the common features.

[0062] Since the vacuum control and electronic valve control speed are relatively fast, it is relatively easy to obtain continuous and stable control of the height of the liquid level 110 in the negative pressure chamber according to the embodiment of the present disclosure. However, when the cavity of the negative pressure chamber is small, or the liquid level is already too high, in order to avoid fluctuations in the liquid level 110 in the negative pressure chamber, an isolation structure can be provided in the fault-tolerant control chamber 20. To this end, in some embodiments, as shown in FIG4 , the liquid cooling system 100 further includes an isolation unit 25, which is provided in the fault-tolerant control chamber 20 and can be switched between an open state and a closed state. In the closed state, the isolation unit 25 separates the fault-tolerant control chamber 20 into a first part 201 and a second part 202, and the first part 201 is connected to the first connecting line 211 and the fault-tolerant control line 22. The second part 202 is connected to the air guide line 23 and the liquid discharge line 24.

[0063] In some embodiments, as shown in FIG4 , the first portion 201 and the second portion 202 can be arranged side by side. In some embodiments, the first portion 201 and the second portion 202 can be arranged in other arrangements, such as an up-down arrangement. For example, the first portion 201 can be arranged above the second portion 202. This arrangement can accelerate the flow of coolant between the first portion 201 and the second portion 202.

[0064] In some embodiments, as shown in FIG4 , when the level 110 of the coolant in the first negative pressure chamber 11 is higher than a first predetermined threshold and the internal pressure of the fault-tolerant control chamber 20 is higher than the pressure in the first negative pressure chamber 11 , the second valve 32 and the isolation unit 25 are opened, and the first valve 31 , the third valve 33 , and the fourth valve 34 are closed, so that the fault-tolerant control line 22 is open, the first portion 201 is connected to the second portion 202 , and the first connecting line 211 , the air guide line 23 , and the liquid discharge line 24 are disconnected. In this case, a negative pressure regulating device such as a vacuum pump can be used to regulate the internal pressure of the fault-tolerant control chamber 20 to be lower than the pressure in the first negative pressure chamber 11 .

[0065] In some embodiments, as shown in FIG4 , when the internal pressure of the fault-tolerant control chamber 20 is adjusted to be lower than the pressure in the first negative pressure chamber 11, the first valve 31, the second valve 32, and the isolation unit 25 are opened, and the third valve 33 and the fourth valve 34 are closed, so that the fault-tolerant control line 22 and the first connecting line 211 are connected, the first portion 201 is connected to the second portion 202, and the air guide line 23 and the liquid discharge line 24 are disconnected. In this case, the pressure difference between the first negative pressure chamber 11 and the fault-tolerant control chamber 20 will cause the coolant in the first negative pressure chamber 11 to flow into the fault-tolerant control chamber 20 via the first connecting line 211, thereby lowering the height of the liquid level 110 in the first negative pressure chamber 11.

[0066] In some embodiments, as shown in FIG4 , when the coolant level in the fault-tolerant control chamber 20 is higher than a first predetermined level, the isolation unit 25 is closed, and the first valve 31, the second valve 32, the third valve 33, and the fourth valve 34 are opened, isolating the first portion 201 from the second portion 202, while the fault-tolerant control line 22, the first connecting line 211, the air guide line 23, and the drain line 24 are all connected. In this case, the coolant in the second portion 202 of the fault-tolerant control chamber 20 can be discharged to the outside of the fault-tolerant control chamber 20 via the drain line 24, while the coolant in the first negative pressure chamber 11 can continue to flow into the first portion 201 of the fault-tolerant control chamber 20.

[0067] In some embodiments, as shown in FIG4 , when the coolant in the second portion 202 of the fault-tolerant control chamber 20 is discharged, the third valve 33 and the fourth valve 34 are closed, and the first valve 31, the second valve 32, and the isolation unit 25 are opened, so that the fault-tolerant control line 22 and the first connecting line 211 are connected, the first portion 201 is connected to the second portion 202, and the air guide line 23 and the drain line 24 are disconnected. In this case, the coolant in the first portion 201 of the fault-tolerant control chamber 20 can flow into the second portion 202, and the coolant in the first negative pressure chamber 11 can continue to flow into the fault-tolerant control chamber 20.

[0068] By setting up the isolation unit 25, the first negative pressure chamber 11 can continuously and stably transport excess coolant to the fault-tolerant control chamber 20. When the amount of coolant in the fault-tolerant control chamber 20 reaches a certain level, the isolation unit 25 can be closed. At this time, the second part 202 of the fault-tolerant control chamber 20 can continue to drain, and the first part 201 can continue to draw liquid from the first negative pressure chamber 11. When the second part 202 finishes draining, after closing the third valve 33 and the fourth valve 34, the isolation unit 25 can be quickly opened to allow the liquid to quickly flow into the second part 202. Then close the isolation unit 25 again, reopen the third valve 33 and the fourth valve 34, and the second part 202 continues to drain. After the coolant in the second part 202 is drained, the above process can be repeated. During the circulation process, the fault-tolerant control chamber 20 can always continuously and stably draw liquid from the first negative pressure chamber 11.

[0069] Embodiments of the present disclosure are also embodied in the following examples.

[0070] Example 1. A liquid cooling system comprising:

[0071] a first negative pressure chamber capable of receiving cooling liquid returned from the cabinet, wherein the first negative pressure chamber is provided with a first negative pressure control pipeline capable of adjusting the pressure in the first negative pressure chamber to be lower than atmospheric pressure; and

[0072] A fault-tolerant control chamber is connected to the first negative pressure chamber via a first connecting pipeline. The fault-tolerant control chamber is provided with a fault-tolerant control pipeline, an air guide pipeline and a drainage pipeline. The fault-tolerant control pipeline can adjust the internal pressure of the fault-tolerant control chamber to be lower than the pressure in the first negative pressure chamber when the liquid level of the coolant in the first negative pressure chamber is higher than a first predetermined threshold, so that the coolant in the first negative pressure chamber flows into the fault-tolerant control chamber when the first connecting pipeline is connected, wherein when the air guide pipeline and the drainage pipeline are connected, the coolant in the fault-tolerant control chamber can be discharged to the outside of the fault-tolerant control chamber via the drainage pipeline.

[0073] Example 2. A liquid cooling system according to Example 1, wherein a first valve is provided on the first connecting pipeline, a second valve is provided on the fault-tolerant control pipeline, a third valve is provided on the air guide pipeline, and a fourth valve is provided on the drain pipeline, and each of the first valve, the second valve, the third valve and the fourth valve is capable of switching between an open state and a closed state so that the corresponding pipeline is switched between a conductive state and a disconnected state.

[0074] Example 3. A liquid cooling system according to Example 2, wherein when the liquid level of the cooling liquid in the first negative pressure chamber is higher than the first predetermined threshold and the internal pressure of the fault-tolerant control chamber is higher than the pressure in the first negative pressure chamber, the second valve is opened, and the first valve, the third valve and the fourth valve are closed to adjust the internal pressure of the fault-tolerant control chamber to be lower than the pressure in the first negative pressure chamber.

[0075] Example 4. A liquid cooling system according to Example 3, wherein when the internal pressure of the fault-tolerant control chamber is adjusted to be lower than the pressure in the first negative pressure chamber, the first valve and the second valve are opened, and the third valve and the fourth valve are closed, so that the cooling liquid in the first negative pressure chamber flows into the fault-tolerant control chamber.

[0076] Example 5. A liquid cooling system according to Example 4, wherein when the liquid level of the coolant in the fault-tolerant control chamber is higher than a first predetermined liquid level, the first valve and the second valve are closed, and the third valve and the fourth valve are opened, so that the coolant in the fault-tolerant control chamber is discharged to the outside of the fault-tolerant control chamber through the drain pipe.

[0077] Example 6. A liquid cooling system according to Example 5, wherein when the coolant in the fault-tolerant control chamber is discharged to a level lower than a second predetermined liquid level and the height of the liquid surface of the coolant in the first negative pressure chamber is higher than the first predetermined threshold, the second valve is opened and the first valve, the third valve and the fourth valve are closed to adjust the internal pressure of the fault-tolerant control chamber to be lower than the pressure in the first negative pressure chamber, wherein the second predetermined liquid level is lower than the first predetermined liquid level.

[0078] Example 7. The liquid cooling system according to Example 2 further includes an isolation unit, which is arranged in the fault-tolerant control chamber and can be switched between an open state and a closed state, wherein the isolation unit separates the fault-tolerant control chamber into a first part and a second part in the closed state, the first part is connected to the first connecting line and the fault-tolerant control line, and the second part is connected to the air guide line and the drain line.

[0079] Example 8. A liquid cooling system according to Example 7, wherein when the height of the liquid level of the cooling liquid in the first negative pressure chamber is higher than the first predetermined threshold and the internal pressure of the fault-tolerant control chamber is higher than the pressure in the first negative pressure chamber, the second valve and the isolation unit are opened, and the first valve, the third valve and the fourth valve are closed to adjust the internal pressure of the fault-tolerant control chamber to be lower than the pressure in the first negative pressure chamber.

[0080] Example 9. A liquid cooling system according to Example 8, wherein when the internal pressure of the fault-tolerant control chamber is adjusted to be lower than the pressure in the first negative pressure chamber, the first valve, the second valve and the isolation unit are opened, and the third valve and the fourth valve are closed, so that the cooling liquid in the first negative pressure chamber flows into the fault-tolerant control chamber.

[0081] Example 10. A liquid cooling system according to Example 9, wherein when the liquid level of the cooling liquid in the fault-tolerant control chamber is higher than a first predetermined liquid level, the isolation unit is closed, and the first valve, the second valve, the third valve and the fourth valve are opened, so that the cooling liquid in the second part of the fault-tolerant control chamber is discharged to the outside of the fault-tolerant control chamber through the drain pipe, and the cooling liquid in the first negative pressure chamber flows into the first part of the fault-tolerant control chamber.

[0082] Example 11. A liquid cooling system according to Example 10, wherein when the discharge of the cooling liquid in the second part of the fault-tolerant control chamber is completed, the third valve and the fourth valve are closed, and the first valve, the second valve and the isolation unit are opened to allow the cooling liquid in the first part of the fault-tolerant control chamber to flow into the second part, and the cooling liquid in the first negative pressure chamber to flow into the fault-tolerant control chamber.

[0083] Example 12. A liquid cooling system according to Example 1, wherein the fault-tolerant control pipeline is capable of adjusting the internal pressure of the fault-tolerant control chamber to be higher than the pressure in the first negative pressure chamber when the liquid level of the cooling liquid in the first negative pressure chamber is lower than a second predetermined threshold, so that the cooling liquid in the fault-tolerant control chamber flows into the first negative pressure chamber when the first connecting pipeline is connected.

[0084] Example 13. The liquid cooling system according to Example 12, wherein a liquid injection port is further provided on the fault-tolerant control cavity, and the liquid injection port is used to add additional cooling liquid into the fault-tolerant control cavity.

[0085] Example 14. The liquid cooling system of Example 1, further comprising:

[0086] The second negative pressure chamber is capable of receiving the cooling liquid returned from the cabinet. The second negative pressure chamber is provided with a second negative pressure control pipeline. The second negative pressure control pipeline can adjust the pressure in the second negative pressure chamber to be lower than the atmospheric pressure. The second negative pressure chamber is connected to the fault-tolerant control chamber via a second connecting pipeline. The second connecting pipeline is provided with a fifth valve. The fifth valve can switch between an open state and a closed state to switch the second connecting pipeline between a conducting state and a disconnected state.

[0087] While various embodiments of the present disclosure have been described above, the above descriptions are illustrative, non-exhaustive, and not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or technological improvements in the marketplace, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A liquid cooling system (100), comprising: A first negative pressure chamber (11) capable of receiving cooling liquid returned from the cabinet, wherein the first negative pressure chamber (11) is provided with a first negative pressure control pipeline (111), and the first negative pressure control pipeline (111) is capable of adjusting the pressure in the first negative pressure chamber (11) to be lower than the atmospheric pressure; as well as A fault-tolerant control chamber (20) is connected to the first negative pressure chamber (11) via a first connecting pipeline (211); the fault-tolerant control chamber (20) is provided with a fault-tolerant control pipeline (22), an air guide pipeline (23) and a liquid discharge pipeline (24); the fault-tolerant control pipeline (22) is capable of adjusting the internal pressure of the fault-tolerant control chamber (20) to be lower than the pressure in the first negative pressure chamber (11) when the height of the liquid level (110) of the cooling liquid in the first negative pressure chamber (11) is higher than a first predetermined threshold, so that the cooling liquid in the first negative pressure chamber (11) flows into the fault-tolerant control chamber (20) when the first connecting pipeline (211) is connected; wherein when the air guide pipeline (23) and the liquid discharge pipeline (24) are connected, the cooling liquid in the fault-tolerant control chamber (20) can be discharged to the outside of the fault-tolerant control chamber (20) via the liquid discharge pipeline (24).

2. The liquid cooling system (100) according to claim 1, wherein a first valve (31) is provided on the first connecting pipeline (211), a second valve (32) is provided on the fault-tolerant control pipeline (22), a third valve (33) is provided on the air guide pipeline (23), and a fourth valve (34) is provided on the drain pipeline (24), and each of the first valve (31), the second valve (32), the third valve (33) and the fourth valve (34) can be switched between an open state and a closed state so that the corresponding pipeline is switched between a conducting state and a disconnected state.

3. The liquid cooling system (100) according to claim 2, wherein when the height of the liquid level (110) of the cooling liquid in the first negative pressure chamber (11) is higher than the first predetermined threshold and the internal pressure of the fault-tolerant control chamber (20) is higher than the pressure in the first negative pressure chamber (11), the second valve (32) is opened, and the first valve (31), the third valve (33) and the fourth valve (34) are closed to adjust the internal pressure of the fault-tolerant control chamber (20) to be lower than the pressure in the first negative pressure chamber (11).

4. The liquid cooling system (100) according to claim 3, wherein when the internal pressure of the fault-tolerant control chamber (20) is adjusted to be lower than the pressure in the first negative pressure chamber (11), the first valve (31) and the second valve (32) are opened, and the third valve (33) and the fourth valve (34) are closed, so that the cooling liquid in the first negative pressure chamber (11) flows into the fault-tolerant control chamber (20).

5. The liquid cooling system (100) according to claim 4, wherein when the liquid level of the coolant in the fault-tolerant control chamber (20) is higher than a first predetermined liquid level, the first valve (31) and the second valve (32) are closed, and the third valve (33) and the fourth valve (34) are opened, so that the coolant in the fault-tolerant control chamber (20) is discharged to the outside of the fault-tolerant control chamber (20) via the drain line (24).

6. The liquid cooling system (100) according to claim 5, wherein when the coolant in the fault-tolerant control chamber (20) is discharged to a liquid level lower than a second predetermined liquid level and the height of the liquid surface (110) of the coolant in the first negative pressure chamber (11) is higher than the first predetermined threshold, the second valve (32) is opened, and the first valve (31), the third valve (33) and the fourth valve (34) are closed, so as to adjust the internal pressure of the fault-tolerant control chamber (20) to be lower than the pressure in the first negative pressure chamber (11), wherein the second predetermined liquid level is lower than the first predetermined liquid level.

7. The liquid cooling system (100) according to claim 2, further comprising an isolation unit (25), the isolation unit (25) is arranged in the fault-tolerant control chamber (20) and can be switched between an open state and a closed state, wherein the isolation unit (25) divides the fault-tolerant control chamber (20) into a first part (201) and a second part (202) in the closed state, the first part (201) is connected to the first connection line (211) and the fault-tolerant control line (22), and the second part (202) is connected to the air guide line (23) and the drain line (24).

8. The liquid cooling system (100) according to claim 7, wherein when the height of the liquid surface (110) of the coolant in the first negative pressure chamber (11) is higher than the first predetermined threshold and the internal pressure of the fault-tolerant control chamber (20) is higher than the pressure in the first negative pressure chamber (11), the second valve (32) and the isolation unit (25) are opened, and the first valve (31), the third valve (33) and the fourth valve (34) are closed, so as to adjust the internal pressure of the fault-tolerant control chamber (20) to be lower than the pressure in the first negative pressure chamber (11).

9. The liquid cooling system (100) according to claim 8, wherein when the internal pressure of the fault-tolerant control chamber (20) is adjusted to be lower than the pressure in the first negative pressure chamber (11), the first valve (31), the second valve (32) and the isolation unit (25) are opened, and the third valve (33) and the fourth valve (34) are closed, so that the coolant in the first negative pressure chamber (11) flows into the fault-tolerant control chamber (20).

10. The liquid cooling system (100) according to claim 9, wherein when the liquid level of the coolant in the fault-tolerant control chamber (20) is higher than a first predetermined liquid level, the isolation unit (25) is closed, and the first valve (31), the second valve (32), the third valve (33) and the fourth valve (34) are opened, so that the coolant in the second part (202) of the fault-tolerant control chamber (20) is discharged to the outside of the fault-tolerant control chamber (20) through the drain pipe (24), and the coolant in the first negative pressure chamber (11) flows into the first part (201) of the fault-tolerant control chamber (20).

11. The liquid cooling system (100) according to claim 10, wherein when the discharge of the cooling liquid in the second part (202) of the fault-tolerant control chamber (20) is completed, the third valve (33) and the fourth valve (34) are closed, and the first valve (31), the second valve (32) and the isolation unit (25) are opened to allow the cooling liquid in the first part (201) of the fault-tolerant control chamber (20) to flow into the second part (202), and the cooling liquid in the first negative pressure chamber (11) to flow into the fault-tolerant control chamber (20).

12. The liquid cooling system (100) according to claim 1, wherein the fault-tolerant control pipeline (22) is capable of adjusting the internal pressure of the fault-tolerant control chamber (20) to be higher than the pressure in the first negative pressure chamber (11) when the height of the liquid level (110) of the cooling liquid in the first negative pressure chamber (11) is lower than a second predetermined threshold value, so that the cooling liquid in the fault-tolerant control chamber (20) can flow into the first negative pressure chamber (11) when the first connecting pipeline (211) is turned on.

13. The liquid cooling system (100) according to claim 12, wherein the fault-tolerant control chamber (20) is also provided with a liquid injection port (26), and the liquid injection port (26) is used to add additional cooling liquid into the fault-tolerant control chamber (20).

14. The liquid cooling system (100) according to claim 1, further comprising: The second negative pressure chamber (12) is capable of receiving cooling liquid returned from the cabinet. The second negative pressure chamber (12) is provided with a second negative pressure control pipeline (121). The second negative pressure control pipeline (121) is capable of adjusting the pressure in the second negative pressure chamber (12) to be lower than the atmospheric pressure. The second negative pressure chamber (12) is connected to the fault-tolerant control chamber (20) via a second connecting pipeline (212). The second connecting pipeline (212) is provided with a fifth valve (35). The fifth valve (35) is capable of switching between an open state and a closed state, so that the second connecting pipeline (212) is switched between a conducting state and a disconnected state.

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