Liquid pumping structure and liquid cooling heat dissipation system

Abstract

The invention provides a liquid pumping structure and a liquid cooling heat dissipation system. The liquid pumping structure comprises a liquid inlet pipeline, a liquid pump and a liquid outlet pipeline which communicate with one another in sequence. An exhaust port is formed in the gas-liquid separation device, and the gas-liquid separation device is used for carrying out gas separation on liquid; the liquid level detection piece is arranged on the gas-liquid separation device and is used for detecting the liquid level height in the gas-liquid separation device, and the exhaust port is opened or closed, so that the liquid level height detected by the liquid level detection piece is not lower than the preset height; the pressure sensor is arranged on the liquid inlet pipeline and is used for detecting the liquid pressure of an inlet of the liquid pump; and the liquid supplementing branch is connected with an inlet of the gas-liquid separation device, and the liquid supplementing branch is opened or closed so that the liquid pressure detected by the pressure sensor can be within a preset pressure range. The problem that the stability and the service life of a liquid cooling heat dissipation system are affected due to long-term cavitation of a water pump caused by gas at a pump inlet in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of data center cooling equipment, and more specifically, to a liquid pumping structure and a liquid cooling and heat dissipation system. Background Art

[0002] With the technological advancements in data centers, CPUs, and GPUs, the heat generated by a single server cabinet is increasing. The existing traditional air-cooling system can no longer meet the cooling requirements of high-heat-density cabinets. Liquid-cooling systems, with their higher heat efficiency, are increasingly being used in high-heat-generating data center servers. Liquid-cooled data centers are increasingly being used in the market. Rack-mounted plug-in frame CDUs, designed for single-cabinet liquid cooling, are also becoming increasingly popular. A CDU (Coolant Distribution Unit) is a cooling liquid distribution device used in data centers, primarily used to regulate and circulate cooling liquid to cool racks, cabinets, or data communication equipment. It circulates cooling liquid through a TCS or DECS circuit, preventing condensation, isolating electronic equipment from cold water, and providing temperature control, ensuring efficient operation of data center equipment. The space occupied by a rack-mounted plug-in frame CDU is generally 4U to 10U in height.

[0003] The water pumps in existing rack-mounted CDUs often fail to separate and discharge the gas at the pump inlet in a timely manner. This results in gas at the pump inlet and causes long-term cavitation in the water pump, affecting the performance, stability, and life of the water pump, and thus the performance, stability, and life of the CDU.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] The purpose of this application is to provide a liquid pumping structure and a liquid cooling and heat dissipation system, which solves the problem in the prior art that the gas at the pump inlet is not separated and discharged in time, resulting in gas at the pump inlet and causing long-term cavitation of the water pump, affecting the stability and life of the liquid cooling and heat dissipation system.

[0006] To achieve the above objectives, the technical solution adopted in this application is:

[0007] In one aspect, the present application provides a liquid pumping structure, comprising a liquid inlet pipeline, a liquid pump, and a liquid outlet pipeline connected in sequence, wherein the liquid pumping structure further comprises:

[0008] A gas-liquid separation device is provided with an exhaust port. The gas-liquid separation device is arranged on the liquid inlet pipeline and located on the inlet side of the liquid pump, and is used to separate gas from liquid;

[0009] A liquid level detection member is provided on the gas-liquid separation device and is used to detect the liquid level height in the gas-liquid separation device. The exhaust port is opened or closed so that the liquid level height detected by the liquid level detection member is not lower than a predetermined height;

[0010] A pressure sensor is provided on the liquid inlet pipeline and is used to detect the liquid pressure at the inlet of the liquid pump;

[0011] The liquid infusion branch is connected to the inlet of the gas-liquid separation device. The liquid infusion branch is opened or closed so that the liquid pressure detected by the pressure sensor is within a predetermined pressure range.

[0012] Optionally, the flow cross-sectional area of ​​the gas-liquid separation device is larger than the pipe diameter of the liquid pump inlet.

[0013] Optionally, the height of the liquid level detection component on the gas-liquid separation device is higher than the top of the interface between the gas-liquid separation device and the liquid pump.

[0014] Optionally, a gas separation guide is provided in the gas-liquid separation device, and the gas separation guide is used to guide the separation of gas from liquid.

[0015] Optionally, the gas separation guide comprises a metal mesh.

[0016] Optionally, a liquid infusion check valve is provided on the liquid infusion branch, and the liquid infusion check valve allows the liquid in the liquid infusion branch to flow into the gas-liquid separation device in a unidirectional manner.

[0017] Optionally, a fluid infusion ball valve is further provided on the fluid infusion branch. The fluid infusion ball valve is provided on the inlet side of the fluid infusion check valve. The fluid infusion ball valve is used to open or close the fluid infusion branch.

[0018] Optionally, the rehydration branch is further connected to a rehydration water tank, a rehydration filter, and a rehydration pump, and the liquid in the rehydration water tank is pumped into the gas-liquid separation device by the rehydration pump for rehydration.

[0019] Optionally, the liquid pumping structure further includes a pressure stabilizing branch, which is arranged on the liquid inlet pipeline and located on the inlet side of the gas-liquid separation device. The pressure stabilizing branch is used to buffer the pressure changes at the liquid pump inlet.

[0020] Optionally, a bladder-type pressure tank is provided on the pressure-stabilizing branch, and the bladder-type pressure tank is connected to the inlet of the gas-liquid separation device.

[0021] Optionally, a pressure-stabilizing ball valve is further provided on the pressure-stabilizing branch line. The pressure-stabilizing ball valve is provided on one side of the outlet of the bladder-type pressure tank to open or close the bladder-type pressure tank.

[0022] Optionally, a check valve is provided at the outlet of the liquid pump, and the check valve is used to allow the liquid to flow out of the liquid pump to the liquid outlet pipeline in one direction.

[0023] Optionally, a plurality of liquid pumps are provided, and the plurality of liquid pumps are connected in parallel to the outlet of the gas-liquid separation device.

[0024] Optionally, the exhaust port is opened or closed by an exhaust valve, and the exhaust valve is a manual exhaust valve or an automatic exhaust valve.

[0025] On the other hand, the present application also proposes a liquid cooling system, comprising the liquid pumping structure as described above, a device to be cooled, and a cold exchange structure;

[0026] The inlet of the liquid inlet pipeline of the liquid pumping structure is connected to the radiator of the device to be cooled, and the liquid outlet pipeline of the liquid pumping structure is connected to the cold exchange structure. The liquid pumping structure is used to extract the liquid from the radiator of the device to be cooled, so that the liquid passes through the cold exchange structure for heat exchange.

[0027] The beneficial effects of the liquid pumping structure and liquid cooling system provided by the present application are at least as follows: by providing a gas-liquid separation device at the inlet end of the liquid pump, on which an exhaust port is provided, the liquid entering the liquid pump can be separated into gas and liquid, and the gas-liquid separation device can effectively separate the gas, and the liquid level detection component controls the exhaust to ensure that no air enters the inlet of the liquid pump, thereby protecting the liquid pump; by detecting the liquid pressure at the inlet of the liquid pump through the pressure sensor, the liquid replenishment branch is controlled to automatically replenish or stop replenishing the liquid, ensuring that the pressure at the inlet of the liquid pump is greater than the pressure that causes cavitation, and at the same time protecting the pressure at the inlet of the liquid pump from being too high, thereby further protecting the liquid pump. In this way, the liquid level detection component is used to ensure that the inlet of the liquid pump is liquid, and the pressure sensor ensures that the liquid pressure at the inlet of the liquid pump is appropriate. Under the synergistic effect of the two, the liquid pump is protected and the liquid pump operates stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 A block diagram of the structural principle of a liquid cooling system provided in an embodiment of the present application;

[0030] Figure 2 A waterway diagram of a liquid pumping structure provided in an embodiment of the present application;

[0031] Figure 3 A structural schematic diagram of a liquid pumping structure provided in an embodiment of the present application.

[0032] Among them, the reference numerals in the figures are:

[0033] 10. Liquid pumping structure; 100. Liquid inlet pipeline; 101. Pressure sensor; 102. Gas-liquid separation device; 103. Liquid level detection element; 104. Liquid pump; 105. Check valve; 106. Liquid replenishment ball valve; 107. Liquid replenishment check valve; 108. Bladder pressure tank; 109. Pressure-stabilizing ball valve; 110. Exhaust valve; 120. Liquid replenishment branch; 130. Pressure-stabilizing branch; 200. Liquid outlet pipeline; 20. Equipment to be cooled; 30. Cooling structure; 40. Cold source. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0035] It should be noted that arrowheads in annotations represent non-physical areas such as holes and slots, non-specific physical features such as superordinate features, or specific directions. Arrowheads without arrowheads in annotations represent physical features or specific subordinate specific features.

[0036] When a component is referred to as being "fixed to" or "disposed on" another component, it may be located directly or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and are not to be understood as limitations on this technical solution. The terms "first" and "second" are only used for the convenience of description and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0037] Example 1

[0038] like Figure 1 As shown, this embodiment proposes a liquid cooling heat dissipation system, including a liquid pumping structure 10, a device to be cooled 20 and a cold exchange structure 30; the liquid pumping structure 10 is mainly improved, and the gas at the pump inlet can be separated and discharged in time, thereby avoiding the problem of long-term cavitation of the water pump caused by gas at the pump inlet, affecting the stability and life of the liquid cooling heat dissipation system.

[0039] The inlet of the liquid inlet pipeline 100 of the liquid pumping structure 10 of the liquid cooling system is connected to the radiator of the device to be cooled 20, and the liquid outlet pipeline 200 of the liquid pumping structure 10 is connected to the cold exchange structure 30. The liquid pumping structure 10 is used to extract the liquid (liquid cooling medium) from the radiator of the device to be cooled 20, so that the liquid passes through the cold exchange structure 30 for heat exchange.

[0040] like Figure 1 As shown, for example, in one structure, the cold exchange structure 30 can be a plate heat exchanger, a condenser, or the like. The cold exchange structure 30 has a first input and a first output. The first input is connected to a liquid pump 104, and the first output is connected to the radiator of the device to be cooled 20, thereby forming an internal cooling water circuit. The device to be cooled 20 can be, for example, a server, storage device, or other IT heat-generating device. In addition, the cold exchange structure 30 also has an external cooling loop, and the internal cooling water circuit and the external cooling loop exchange heat within the cold exchange structure 30. Specifically, the external cooling loop includes a second output and a second input in the cold exchange structure 30, both of which are used to connect to a cold source 40 for heat dissipation. Heat from the device to be cooled 20 is absorbed by the radiator and then transported to the cold exchange structure 30 via the external cooling loop, exchanging heat with the external cooling water circuit to achieve cooling.

[0041] Example 2

[0042] like Figure 1 、 Figure 2 As shown, this embodiment provides a liquid pumping structure 10, comprising a liquid inlet pipeline 100, a liquid pump 104, and a liquid outlet pipeline 200, which are sequentially connected. The inlet of the liquid inlet pipeline 100 can be connected to the radiator in the heat dissipation device 20, and the outlet is connected to the inlet of the liquid pump 104. The outlet of the liquid pump 104 is connected to the liquid outlet pipeline 200, and the outlet of the liquid outlet pipeline 200 is used to connect to the cold exchange structure 30. In the water path, liquid flows from the liquid inlet pipeline 100 through the liquid pump 104 and enters the liquid outlet pipeline 200. For the convenience of structural description, the structure is described with the liquid in the water path as the upstream direction and the liquid outflow direction as the downstream direction.

[0043] like Figure 2 、 Figure 3As shown, the liquid pumping structure 10 of this embodiment also includes: a gas-liquid separation device 102, a liquid level detection component 103, a pressure sensor 101 and a liquid replenishing branch 120. The gas-liquid separation device 102 is arranged on the liquid inlet pipeline 100 and is located on the inlet side of the liquid pump 104, and is used to separate the liquid into gas, so that the liquid (liquid cooling medium) in the liquid inlet pipeline 100 enters the gas-liquid separation device 102 for gas-liquid separation, and then the liquid cooling medium without gas enters the liquid pump 104. An exhaust port is provided on the gas-liquid separation device 102. When the separated gas accumulates to a certain amount, the exhaust port is opened in time for exhaust. The liquid level detection component 103 can be a liquid level sensor or a liquid level switch, which is arranged on the gas-liquid separation device 102 and is used to detect the liquid level height in the gas-liquid separation device 102. The exhaust port is controlled to be opened or closed according to the liquid level height detected by the liquid level detection component 103, so that the liquid level height detected by the liquid level detection component 103 is not lower than a predetermined height. In the specific process, the liquid level detection component 103 can determine the amount of gas separated in the gas-liquid separation device 102 by detecting the liquid level height in the gas-liquid separation device 102. The position of the liquid level detection component 103 is a predetermined height. When there is too much gas in the gas-liquid separation device 102, causing the liquid level to be lower than the position of the liquid level detection component 103, the liquid level detection component 103 can feed back a signal to the electrical control system, which will issue an alarm and / or control instruction to prompt the exhaust port to be opened in time to remove the gas in the gas-liquid separation device 102 during the first liquid addition or operation. This ensures that the gas after gas-liquid separation can be discharged in time, and no air enters the inlet of the liquid pump 104, thereby protecting the liquid pump 104. The pressure sensor 101 is arranged on the liquid inlet pipeline 100, located on the inlet side of the liquid pump 104. The pressure sensor 101 is used to detect the liquid pressure at the inlet of the liquid pump 104. The liquid infusion branch 120 is connected to the inlet of the gas-liquid separation device 102, and the liquid infusion branch 120 is controlled to be opened or closed by the liquid pressure at the inlet of the liquid pump 104 detected by the pressure sensor 101, so that the liquid pressure detected by the pressure sensor 101 is within the predetermined pressure range, and the inlet pressure of the liquid pump 104 is within the predetermined pressure range, thereby ensuring the stable operation of the liquid pump 104.During the specific process, the pressure sensor 101 detects the inlet pressure of the liquid pump 104. When the pump inlet pressure is lower than the set first pressure value, the pressure sensor 101 can feed back a signal to the electrical control system, and the electrical control system issues an alarm and / or a control instruction to start automatic fluid replenishment or prompt manual fluid replenishment. When it is detected that the inlet pressure of the liquid pump 104 is higher than the set second pressure value, the pressure sensor 101 can feed back a signal to the electrical control system, and the electrical control system issues an alarm and / or a control instruction to automatically stop fluid replenishment or prompt to stop fluid replenishment, ensuring that the inlet pressure of the liquid pump 104 is within a predetermined pressure range between the first pressure value and the second pressure value, and the first pressure value is greater than the maximum pressure that causes cavitation of the liquid pump 104, and the second pressure value is less than or equal to the limit pressure of the liquid pump 104. In this way, the liquid pump 104 can be ensured to operate continuously within the predetermined pressure range. The operating pressure of the liquid pump 104 is greater than the maximum pressure that causes cavitation of the liquid pump 104 without causing cavitation. At the same time, the inlet pressure of the liquid pump 104 is protected from being too high, thereby forming further protection for the liquid pump 104.

[0044] like Figure 2 、 Figure 3 As shown, the liquid pumping structure 10 of this embodiment is provided with a gas-liquid separation device 102 at the inlet end of the liquid pump 104, which is provided with an exhaust port, so that the liquid entering the liquid pump 104 can be separated into gas and liquid. The gas-liquid separation device 102 can effectively separate the gas, and the liquid level detection component 103 controls the exhaust to ensure that no air enters the inlet of the liquid pump 104, thereby protecting the liquid pump 104; the pressure sensor 101 detects the liquid pressure at the inlet of the liquid pump 104, thereby controlling the liquid replenishment branch 120 to automatically replenish or stop replenishing liquid, ensuring that the pressure at the inlet of the liquid pump 104 is greater than the pressure that causes cavitation, and at the same time protecting the pressure at the inlet of the liquid pump 104 from being too high, thereby further protecting the liquid pump 104. In this way, the liquid level detection component 103 is used to ensure that the inlet of the liquid pump 104 is liquid, and the pressure sensor 101 ensures that the liquid pressure at the inlet of the liquid pump 104 is appropriate. Under the synergistic effect of the two, the liquid pump 104 is protected, so that the liquid pump 104 can operate stably.

[0045] like Figure 2 、 Figure 3As shown, further, the flow cross-sectional area of ​​the gas-liquid separation device 102 of this embodiment is larger than the diameter of the liquid pump 104 inlet. In the specific structure, the gas-liquid separation device 102 can be square, round or other special shapes, and can be flexibly set according to the requirements of the use environment. The flow cross-sectional area of ​​the gas-liquid separation device 102 is much larger than the pump inlet diameter, and the pump inlet diameter is matched with the diameter of the liquid inlet pipeline 100. Therefore, in the process of liquid entering the gas-liquid separation device 102 from the liquid inlet pipeline 100, the gas can be effectively separated by reducing the liquid flow rate of the liquid in the gas-liquid separation device 102. For example, the flow cross-sectional area of ​​this embodiment can make the liquid flow rate in the gas-liquid separation device 102 ≤0.5m / s, so that the liquid flow rate can be steadily reduced in the gas-liquid separation device 102 to separate the gas.

[0046] like Figure 2 、 Figure 3 As shown, further, the height of the liquid level detector 103 on the gas-liquid separator 102 in this embodiment is higher than the top of the interface between the gas-liquid separator 102 and the liquid pump 104. In the specific structure, the height of the liquid level detector 103 is set at least 2 cm higher than the highest point of the interface between the gas-liquid separator 102 and the liquid pump 104, so that the amount of liquid in the gas-liquid separator is sufficient, ensuring sufficient liquid height margin and avoiding operational errors of the liquid level detector 103. Therefore, when the liquid level of the liquid level detector 103 is continuously at a position more than 2 cm higher than the highest point of the inlet of the liquid pump 104, when it falls below this height, the liquid level detector 103 sends a signal indicating excessive gas volume and promptly opens the exhaust port for exhaust. The 2 cm height difference provides the operator with time to react and operate after hearing the alarm. Before the gas pushes the liquid level down to 2 cm, exhaust operations will not affect the normal operation of the liquid pump 104.

[0047] like Figure 2 、 Figure 3 As shown, further, a gas separation guide is provided in the gas-liquid separation device 102 of this embodiment, and the gas separation guide is used to guide the gas to separate from the liquid. When the liquid flows in the gas-liquid separation device 102, the gas is guided to pass through, and is more effectively separated from the liquid.

[0048] like Figure 2 、 Figure 3 As shown, the gas separation guide further comprises a metal mesh. When the liquid mixed with gas passes through the metal mesh, the gas adheres to the metal mesh, making the gas-liquid separation more efficient. The metal mesh is a three-dimensional spiral mesh structure made of welded stainless steel wire. The spiral mesh structure increases the contact surface area within a limited space, allowing for more gas to adhere.

[0049] like Figure 2 、 Figure 3 As shown, in this embodiment, a liquid replenishment check valve 107 is further provided on the liquid replenishment branch 120. The liquid replenishment check valve 107 allows the liquid in the liquid replenishment branch 120 to flow unidirectionally into the gas-liquid separation device 102. The liquid replenishment branch 120 can replenish the liquid in time with the operation of the liquid pump 104. By providing the liquid replenishment check valve 107, the backflow of the replenished liquid can be prevented, so that the liquid replenished in the liquid replenishment branch 120 can flow stably into the liquid pump 104.

[0050] like Figure 2 、 Figure 3 As shown, in this embodiment, a fluid infusion ball valve 106 is further provided on the fluid infusion branch 120. The fluid infusion ball valve 106 is provided on the inlet side of the fluid infusion check valve 107 and is used to open or close the fluid infusion branch 120. The fluid infusion ball valve 106 can control the opening or closing of the fluid infusion branch 120, thereby facilitating control of the fluid infusion process.

[0051] The stability of the rehydration process is ensured by the rehydration ball valve 106 and the rehydration check valve 107 on the rehydration branch 120. The rehydration process includes rehydration due to insufficient pressure when the liquid pump 104 is first operated, or rehydration due to insufficient pressure during subsequent continuous operation.

[0052] like Figure 2 、 Figure 3 As shown, the infusion branch 120 of this embodiment is further connected to a fluid infusion tank, a fluid infusion filter, and a fluid infusion pump. The fluid infusion pump pumps 104 of the liquid in the fluid infusion tank into the gas-liquid separation device 102 for fluid infusion. The fluid infusion tank, fluid infusion filter, and fluid infusion pump replenish the liquid circulation system, achieving more automated fluid infusion. For example, the fluid infusion pump is electrically connected to an electrical control system, which controls the infusion pump to turn on or off based on a signal from the pressure sensor 101, thereby achieving automatic fluid infusion.

[0053] like Figure 2 、 Figure 3 As shown, the liquid pumping structure 10 of this embodiment further includes a pressure stabilizing branch 130. The pressure stabilizing branch 130 is provided on the liquid inlet pipeline 100 and is located on the inlet side of the gas-liquid separation device 102. The pressure stabilizing branch 130 is used to buffer the pressure changes at the inlet of the liquid pump 104. For example, when the pressure at the inlet of the liquid pump 104 suddenly drops at the moment of starting the liquid pump 104, the pressure stabilizing branch 130 can immediately increase the pressure to slow down the sudden drop, thereby avoiding such a sudden pressure drop and stabilizing the pressure at a pressure greater than the pressure causing cavitation, thereby avoiding cavitation of the liquid pump 104. For example, during the operation of the liquid pump 104, the pressure changes caused by the change in liquid temperature during the liquid circulation process can be buffered, thereby stabilizing the pressure within a predetermined pressure range for continuous operation.

[0054] like Figure 2 、 Figure 3 As shown, in this embodiment, a bladder pressure tank 108 is provided on the pressure stabilizing branch 130, and the bladder pressure tank 108 is connected to the inlet of the gas-liquid separation device 102. The bladder pressure tank 108 quickly replenishes the liquid pressure in the pipeline, thereby preventing a sudden drop in pressure at the inlet of the liquid pump 104 when the liquid pump 104 is started, which would cause cavitation of the liquid pump 104, and can also buffer pressure changes in the liquid system caused by changes in liquid temperature.

[0055] like Figure 2 、 Figure 3 As shown, further, a pressure-stabilizing ball valve 109 is provided on the pressure-stabilizing branch 130 of this embodiment. The pressure-stabilizing ball valve 109 is provided on one side of the outlet of the bladder pressure tank 108 to open or close the bladder pressure tank 108. The pressure-stabilizing ball valve 109 can control the opening or closing of the pressure-stabilizing branch 130, thereby facilitating control of the pressure stabilization process.

[0056] like Figure 2 、 Figure 3 As shown, further, the outlet of the liquid pump 104 of this embodiment is provided with a check valve 105, which is used to allow liquid to flow out of the liquid pump 104 in one direction to the liquid outlet pipeline 200. The check valve 105 is provided at the outlet of the liquid pump 104 to prevent liquid from flowing back from the stopped liquid pump 104 during operation, thereby ensuring that the output of the liquid pump 104 is more stable.

[0057] like Figure 2 、 Figure 3 As shown, further, in this embodiment, multiple liquid pumps 104 are provided, and these multiple liquid pumps 104 are connected in parallel at the outlet of the gas-liquid separation device 102. The power for liquid circulation provided by the liquid pumps 104 can be one, two, or more. A check valve 105 is provided at the outlet of each liquid pump 104. This allows for multiple alternate or simultaneous circulation power sources to accommodate varying operating environments.

[0058] Furthermore, the exhaust port is opened or closed by an exhaust valve 110 , and the exhaust valve 110 may be a manual exhaust valve 110 or an automatic exhaust valve 110 .

[0059] When the exhaust valve 110 is a manual exhaust valve 110 , if the amount of gas separated in the gas-liquid separation device 102 causes the liquid level to fall below the liquid level detection element 103 , the liquid level detection element 103 can feed back a signal to the electrical control system, which then issues an audible and visual alarm or an alarm on the host computer, prompting maintenance personnel to promptly open the manual exhaust valve 110 to expel the gas. This ensures that no air enters the inlet of the liquid pump 104 , thereby protecting the liquid pump 104 .

[0060] When the exhaust valve 110 is an automatic exhaust valve 110, when the liquid level detection element 103 detects that the liquid level is lower than a predetermined height, the liquid level detection element 103 can feed back a signal to the electrical control system, and the liquid level detection element 103 can be used to detect whether the exhaust valve 110 fails.

[0061] In summary, the present application proposes a liquid pumping structure and a liquid cooling system, which realizes liquid-gas separation by cooperating with a gas-liquid separation device and a liquid level detection component. Combined with the pressure sensor and the liquid replenishment branch, the liquid inlet pressure of the liquid pump is made more stable. And the bladder-type pressure tank is used to stabilize the liquid inlet pressure, thereby achieving triple protection for the liquid pump and preventing cavitation of the liquid pump. Ensure good exhaust of the internal liquid pump inlet of the liquid pumping structure, and ensure that the liquid pump will not cause long-term cavitation of the liquid pump due to gas at the pump inlet, thereby avoiding affecting the performance, stability and life of the water pump, and thus affecting the performance, stability and life of the CDU.

[0062] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A liquid pumping structure, comprising a liquid inlet pipeline, a liquid pump and a liquid outlet pipeline connected in sequence, characterized in that: The liquid pumping structure further comprises: a gas-liquid separation device having an exhaust port, the gas-liquid separation device being arranged on the liquid inlet pipeline and located on the inlet side of the liquid pump, for separating gas from liquid; a liquid level detection member, the liquid level detection member being disposed on the gas-liquid separation device and being used to detect the liquid level height in the gas-liquid separation device, the exhaust port being opened or closed so that the liquid level height detected by the liquid level detection member is not lower than a predetermined height; a pressure sensor, the pressure sensor being arranged on the liquid inlet pipeline and being used to detect the liquid pressure at the inlet of the liquid pump; A liquid infusion branch is connected to the inlet of the gas-liquid separation device, and the liquid infusion branch is opened or closed so that the liquid pressure detected by the pressure sensor is within a predetermined pressure range.

2. The liquid pumping structure according to claim 1, characterized in that: The flow cross-sectional area of ​​the gas-liquid separation device is larger than the pipe diameter of the liquid pump inlet.

3. The liquid pumping structure according to claim 2, characterized in that: The height of the liquid level detecting component on the gas-liquid separation device is higher than the top of the interface between the gas-liquid separation device and the liquid pump.

4. The liquid pumping structure according to claim 2, characterized in that: A gas separation guide is provided in the gas-liquid separation device, and the gas separation guide is used to guide the gas to separate from the liquid; The gas separation guide includes a metal mesh.

5. The liquid pumping structure according to claim 1, wherein: The liquid infusion branch is provided with a liquid infusion check valve, and the liquid in the liquid infusion branch is allowed to flow into the gas-liquid separation device in a one-way manner; The liquid infusion branch is further provided with a liquid infusion ball valve, which is arranged on the inlet side of the liquid infusion check valve and is used to open or close the liquid infusion branch; The rehydration branch is also connected to a rehydration water tank, a rehydration filter, and a rehydration pump, and the liquid in the rehydration water tank is pumped into the gas-liquid separation device by the rehydration pump for rehydration.

6. The liquid pumping structure according to claim 1, wherein: The liquid pumping structure further includes a pressure stabilizing branch, which is provided on the liquid inlet pipeline and located on the inlet side of the gas-liquid separation device, and is used to buffer the pressure change of the liquid pump inlet; The pressure stabilizing branch is provided with a bladder-type pressure tank, and the bladder-type pressure tank is connected to the inlet of the gas-liquid separation device; The pressure stabilizing branch is further provided with a pressure stabilizing ball valve, which is arranged on one side of the outlet of the bladder type pressure tank to open or close the bladder type pressure tank.

7. The liquid pumping structure according to claim 1, characterized in that: The outlet of the liquid pump is provided with a check valve, and the check valve is used to allow the liquid to flow out of the liquid pump to the liquid outlet pipeline in one direction.

8. The liquid pumping structure according to claim 7, characterized in that: The liquid pumps are provided in plurality and are connected in parallel to the outlet of the gas-liquid separation device.

9. The liquid pumping structure according to any one of claims 1 to 8, characterized in that: The exhaust port is opened or closed by an exhaust valve, and the exhaust valve is a manual exhaust valve or an automatic exhaust valve.

10. A liquid cooling system, characterized in that: It comprises the liquid pumping structure according to any one of claims 1 to 9, the device to be cooled and the cold exchange structure; The inlet of the liquid inlet pipeline of the liquid pumping structure is connected to the device to be cooled, and the liquid outlet pipeline of the liquid pumping structure is connected to the cold exchange structure. The liquid pumping structure is used to extract the liquid from the device to be cooled, so that the liquid passes through the cold exchange structure for heat exchange.

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