Automatic pressure-stabilizing liquid supplementing system

Abstract

The utility model discloses an automatic pressure-stabilizing liquid supplementing system, and relates to the technical field of liquid cooling. The system comprises a liquid storage tank, a circulating pump, a first circulating control valve, a second circulating control valve, a pressure sensor, a first liquid supplementing control valve, a second liquid supplementing control valve and a control system, the control system achieves automatic switching of a circulating purification mode and a liquid supplementing mode, and secondary side loop pressure is monitored in real time through the pressure sensor; when the temperature is lower than a threshold value, a liquid supplementing mode is automatically started, and a circulating pump drives cooling liquid to be accurately supplemented; and the circulating purification mode is switched in a normal state, so that the cooling liquid circulates in a closed loop between the liquid storage tank and the cooling capacity distribution unit, the problems that a dead water area exists and the liquid supplementing pressure is unstable in an existing liquid cooling system are solved, the cooling liquid circulation efficiency and the water quality controllability are improved, and the system is suitable for high-precision liquid cooling scenes such as data centers and industrial cooling.

Description

Technical Field

[0001] This application relates to the field of liquid cooling system technology, and more particularly to an automatic pressure stabilizing and liquid replenishing system. Background Technology

[0002] With the continuous increase in power density in fields such as data centers, new energy vehicles, and industrial precision equipment, liquid cooling systems have become the mainstream heat dissipation solution due to their advantages such as high heat dissipation efficiency and low energy consumption. The stable operation of liquid cooling systems depends on the pressure balance and flow control of the circulating fluid. Among them, pressure fluctuations in the secondary system (such as equipment cold plates and heat dissipation pipes) are a key factor affecting heat dissipation performance and system safety.

[0003] In the existing technology, the replenishment of the secondary side system relies on the cooling distribution unit (CDU), but the replenishment volume is small, and manual intervention is required when there is serious leakage. The response is slow and it is easy to cause equipment downtime. At the same time, the liquid in the cooling distribution unit and the replenishment pipeline is a stagnant water area, and the stored coolant is prone to deterioration. The solution will cause system pollution after being replenished into the system, which poses a great risk. Utility Model Content

[0004] To overcome the problems existing in related technologies, this application provides an automatic pressure stabilization and liquid replenishment system, which can prevent the risk of stagnant water in the system, and realize automatic pressure stabilization and dynamic liquid replenishment of the secondary side of the liquid cooling system. It effectively simplifies the pipeline structure, improves the pressure regulation accuracy and response speed, and reduces the need for manual operation and maintenance.

[0005] This application provides an automatic pressure stabilizing and liquid replenishing system for use in a liquid cooling system, including a liquid storage tank, a circulating pump, a first circulation control valve, a second circulation control valve, a liquid replenishing unit, and a control system;

[0006] The input end of the circulating pump is connected to the liquid storage tank, and its output end is connected to the first circulating control valve, the cooling capacity distribution unit of the liquid cooling system, and the secondary side system of the liquid cooling system, respectively.

[0007] The first circulation control valve and the cold energy distribution unit are both connected to the liquid storage tank, and a second circulation control valve is provided between the cold energy distribution unit and the liquid storage tank.

[0008] The replenishment unit is provided between the circulating pump and the secondary system. The replenishment unit includes a pressure sensor, a first replenishment control valve, and a second replenishment control valve, wherein:

[0009] The pressure sensor and the first replenishment control valve are connected in series in the pipeline between the circulating pump and the secondary system, and the pressure sensor is located between the first replenishment control valve and the secondary system.

[0010] The input end of the second replenishment control valve is connected to the first replenishment control valve through a pipeline, and its output end is connected to the liquid storage tank;

[0011] The control system is electrically connected to the circulating pump, the first circulating control valve, the second circulating control valve, and the replenishment unit, respectively.

[0012] In some embodiments, the storage tank is equipped with an ultraviolet germicidal lamp, a pH meter, a conductivity sensor, and a liquid level sensor that are electrically connected to the control system.

[0013] The pH meter is used to detect the pH value of the water, the conductivity sensor is used to detect the conductivity of the water, and the liquid level sensor is used to monitor the liquid level in the storage tank.

[0014] In some embodiments, a filtration unit is also included, which is connected in series in the pipeline between the storage tank and the circulation pump.

[0015] In some embodiments, the filtration unit includes any one of a mesh filter, a cartridge filter, and a pre-filter.

[0016] In some embodiments, a first manual control valve is provided on the pipeline between the circulating pump and the cooling capacity distribution unit.

[0017] In some embodiments, the cooling capacity distribution unit is equipped with a float switch, which is electrically connected to the control system and is used to monitor the liquid level of the cooling capacity distribution unit.

[0018] In some embodiments, the fluid replenishment unit further includes a second manual control valve and a third manual control valve, wherein:

[0019] The second manual control valve is connected in series in the pipeline between the pressure sensor and the first replenishment control valve;

[0020] The third manual control valve is connected in series in the pipeline between the circulating pump and the first replenishment control valve;

[0021] The input end of the second replenishment control valve is connected to the pipeline between the third manual control valve and the first replenishment control valve.

[0022] In some embodiments, the replenishment unit further includes a drain valve connected in series in the pipeline between the pressure sensor and the secondary system.

[0023] The technical solution provided in this application may include the following beneficial effects:

[0024] When the technical solution of this utility model is applied to a liquid cooling system, the combination of the liquid storage tank and the circulating pump forms a pipeline system with dual functions of circulation and liquid replenishment. It can connect to the cooling capacity distribution unit and secondary side system of one or more liquid cooling systems, and can quickly respond to pressure changes in the secondary side system and achieve automatic pressure stabilization and liquid replenishment, while preventing the risk of stagnant water in the system. Attached Figure Description

[0025] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0026] Figure 1 This is a schematic diagram of the automatic pressure stabilizing and fluid replenishment system shown in the embodiments of this application;

[0027] Figure 2 This is another structural schematic diagram of the automatic pressure stabilizing and fluid replenishment system shown in the embodiments of this application;

[0028] Figure 3 This is another structural schematic diagram of the automatic pressure stabilizing and fluid replenishment system shown in the embodiments of this application.

[0029] Figure label:

[0030] 1. Storage tank; 2. Circulation pump; 3. First circulation control valve; 4. Second circulation control valve; 5. Pressure sensor; 6. First replenishment control valve; 7. Second replenishment control valve; 8. Ultraviolet germicidal lamp; 9. pH meter; 10. Conductivity sensor; 11. Liquid level sensor; 12. First manual control valve; 13. Float switch; 14. Second manual control valve; 15. Third manual control valve; 16. Drain valve; 101. Cooling distribution unit; 102. Secondary side system. Detailed Implementation

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

[0032] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0033] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the automatic pressure stabilizing and fluid replenishment system shown in the embodiments of this application.

[0036] See Figure 1 This utility model proposes an automatic pressure stabilizing and replenishing liquid system, including a liquid storage tank 1, a circulating pump 2, a first circulating control valve 3, a second circulating control valve 4, a replenishing unit, and a control system;

[0037] The input end of the circulating pump 2 is connected to the liquid storage tank 1, and its output end is connected to the first circulating control valve 3, the cooling capacity distribution unit 101 of the liquid cooling system and the secondary side system 102 of the liquid cooling system, respectively.

[0038] The first circulation control valve 3 and the cold energy distribution unit 101 are both connected to the liquid storage tank 1, and a second circulation control valve 4 is provided between the cold energy distribution unit 101 and the liquid storage tank 1.

[0039] The replenishment unit is provided between the circulating pump 2 and the secondary system 102. The replenishment unit includes a pressure sensor 5, a first replenishment control valve 6, and a second replenishment control valve 7, wherein:

[0040] The pressure sensor 5 and the first replenishment control valve 6 are connected in series in the pipeline between the circulation pump 2 and the secondary side system 102, and the pressure sensor 5 is located between the first replenishment control valve 6 and the secondary side system 102.

[0041] The input end of the second replenishment control valve 7 is connected to the first replenishment control valve 6 through a pipeline, and its output end is connected to the liquid storage tank 1;

[0042] The control system is electrically connected to the circulating pump 2, the first circulating control valve 3, the second circulating control valve 4, and the replenishment unit, respectively.

[0043] This automatic pressure-stabilizing and liquid-replenishing system is applied to a liquid cooling system, which includes a cooling capacity distribution unit 101 and a secondary system 102. The automatic pressure-stabilizing and liquid-replenishing system mainly consists of a liquid storage tank 1, a circulating pump 2, a first circulation control valve 3, a second circulation control valve 4, a replenishment unit, and a control system. The output of the circulating pump 2 is connected to both the cooling capacity distribution unit 101 and the secondary system 102 of the liquid cooling system via pipelines. In specific implementation, such as... Figures 1 to 3 As shown, multiple cooling capacity distribution units 101 and multiple secondary side systems 102 can be connected according to system requirements.

[0044] The liquid storage tank 1 can be made of stainless steel or engineering plastic, and its volume can be designed from 50 to 500L according to system requirements. The circulation pump 2 can be a magnetically driven centrifugal pump with a flow rate range of 5 to 50L / min. The first circulation control valve 3 and the second circulation control valve 4 can be electric ball valves or electric butterfly valves. The pressure sensor 5 has a monitoring range of 0-1MPa, and the first replenishment control valve 6 and the second replenishment control valve 7 can be two-position two-way solenoid valves. The liquid storage tank 1, circulation pump 2, and first circulation control valve 3 together form the normally open first circulation loop of the system; the liquid storage tank 1, circulation pump 2, second circulation control valve 4, and cold energy distribution unit 101 together form the second circulation loop of the system; the liquid storage tank 1, circulation pump 2, pressure sensor 5, first replenishment control valve 6, and secondary side system 102 together form the replenishment path of the system; the liquid storage tank 1, circulation pump 2, and second replenishment control valve 7 together form the third circulation loop of the system. In the first, second, and third circulation loops, the first circulation loop is a normally open loop, the second and third circulation loops are designed to be synchronously switched on and off, and the switching on and off of the third circulation loop and the replenishment path are mutually exclusive. Specifically, this active pressure-stabilizing replenishment system has a circulation mode and a replenishment mode. After the system is started, the circulation pump 2 operates in circulation mode according to the set pressure or flow rate. The pressure can be designed to be 0.1 to 0.2 MPa according to system requirements. In circulation mode, the first circulation control valve 3, the second circulation control valve 4, and the second replenishment control valve 7 are opened, and the first replenishment control valve 6 is closed. The coolant in the storage tank 1 is circulated and purified, thereby eliminating the potential for stagnant water in the cooling capacity distribution unit 101, the storage tank 1, and the pipelines. When pressure sensor 5 detects that the pressure of secondary system 102 is lower than a preset value, for example, the preset pressure of pressure sensor 5 can be set to 0.05MPa, the control system closes the first circulation control valve 3, the second circulation control valve 4 and the second replenishment control valve 7, and opens the first replenishment control valve 6. The circulation pump 2 replenishes the secondary system 102. When the pressure of secondary system 102 reaches the target pressure, the control system closes the first replenishment control valve 6 and opens the first circulation control valve 3, the second circulation control valve 4 and the second replenishment control valve 7 to restore the circulation mode.

[0045] In this embodiment, the pressure of the secondary system 102 is directly monitored by an independent replenishment unit. When the pressure is lower than a set threshold, the control system opens the first replenishment control valve 6 to replenish the secondary system 102. Simultaneously, a circulation path is established with the storage tank 1 through the second replenishment control valve 7 to prevent the formation of dead water zones. Compared with existing technologies, the replenishment response time is shortened from minutes to seconds, and precise pressure regulation is achieved through closed-loop control, solving the response lag problem caused by traditional reliance on the cooling capacity distribution unit 101 for replenishment. The series arrangement of the pressure sensor 5 and the replenishment valve can provide real-time feedback on the replenishment pressure, preventing over- or under-replenishment. The system adopts a modular design, with each control unit working independently yet cooperating with the control system, improving system reliability while ensuring pressure stabilization accuracy.

[0046] This utility model further proposes that the liquid storage tank 1 is equipped with an ultraviolet germicidal lamp 8, a pH meter 9, a conductivity sensor 10 and a liquid level sensor 11 that are electrically connected to the control system.

[0047] The pH meter 9 is used to detect the pH value of the water, the conductivity sensor 10 is used to detect the conductivity of the water, and the level sensor 11 is used to monitor the level of the coolant in the storage tank 1. The ultraviolet germicidal lamp 8 is used to sterilize the coolant; the ultraviolet germicidal lamp 8 can be a low-pressure mercury lamp or a UV-LED lamp, preferably with a wavelength range of 254 nm, and is installed on the top wall inside the storage tank. The pH meter and conductivity sensor 10 monitor the acidity / alkalinity and conductivity of the coolant in real time. The pH meter 9 can be a glass electrode type or an ISFET type sensor, with a measurement range covering 6.0-8.5 pH. The conductivity sensor 10 is preferably a four-electrode type, with a range covering 0-2000 μS / cm. The level sensor 11 monitors the coolant level in the storage tank 1, and can specifically be a float type, capacitive type, or ultrasonic type. The storage tank 1 can also be connected to an external deionized water generator. When the conductivity exceeds 1000 μS / cm, the control system automatically starts the water exchange program; when the pH value exceeds 8, an alarm is triggered and the ultraviolet sterilization lamp 8 is activated simultaneously. With this setting, the problems of algae growth in stagnant water areas and corrosion of metal parts can be effectively avoided.

[0048] To further improve the cleanliness of the coolant in the system, the automatic pressure stabilizing and replenishing system also includes a filtration unit. The filtration unit is connected in series in the pipeline between the liquid storage tank 1 and the circulating pump 2. The filtration unit is located between the liquid storage tank 1 and the circulating pump 2 and can filter the coolant in the circulating pipeline to remove particulate contaminants from the coolant, preventing contaminants from entering the secondary side system 102 or the cooling capacity distribution unit 101, thereby maintaining the cleanliness and operational stability of the liquid cooling system.

[0049] The filtration unit can be any of the following: a mesh filter, a cartridge filter, or a pre-filter. Mesh filters intercept particulate matter through metal mesh and are suitable for high-flow-rate applications; cartridge filters achieve fine filtration through fibers or sintered materials and are suitable for high-purity fluids; pre-filters use multiple layers of mesh for tiered filtration, which can extend the service life of subsequent filters.

[0050] Furthermore, a first manual control valve 12 is provided on the pipeline between the circulating pump 2 and the cooling capacity distribution unit 101.

[0051] Furthermore, the cooling capacity distribution unit 101 is equipped with a float switch 13, which is electrically connected to the control system and is used to monitor the liquid level of the cooling capacity distribution unit 101. When the float switch 13 detects that the liquid level of the cooling capacity distribution unit 101 has dropped to a preset value, the liquid can be replenished to the cooling capacity distribution unit 101 by closing the first circulation control valve 3.

[0052] Furthermore, the fluid replenishment unit also includes a second manual control valve 14 and a third manual control valve 15, wherein:

[0053] The second manual control valve 14 is connected in series in the pipeline between the pressure sensor 5 and the first replenishment control valve 6;

[0054] The third manual control valve 15 is connected in series in the pipeline between the circulating pump 2 and the first replenishment control valve 6;

[0055] The input end of the second replenishment control valve 7 is connected to the pipeline between the third manual control valve 15 and the first replenishment control valve 6.

[0056] Specifically, the first manual control valve 12, the second manual control valve 14, and the third manual control valve 15 are normally open, and can be common manual valve types such as ball valves, gate valves, or butterfly valves. As a redundant design for the first circulation control valve 3 and the first replenishment control valve 6, in the event of a failure of the first circulation control valve 3 or the first replenishment control valve 6, the operator can manually operate them to ensure emergency replenishment functionality. Simultaneously, when the system requires maintenance or debugging, the coolant supply to the cooling capacity distribution unit 101 can be manually cut off without affecting the normal operation of other circuits.

[0057] Furthermore, the liquid replenishment unit also includes a drain valve 16, which is connected in series in the pipeline between the pressure sensor 5 and the secondary system 102. This drain valve 16 is used to quickly discharge excess liquid when the system pressure is abnormal, preventing excessive pressure in the secondary system 102 from causing pipeline rupture or equipment damage. The drain valve 16 can be an automatically controlled valve such as a solenoid valve, pneumatic valve, or electric valve, or a manually operated ball valve or gate valve can be used as a backup.

[0058] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to 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 chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An automatic pressure-stabilizing and liquid-replenishing system, applied to a liquid cooling system, characterized in that, It includes a liquid storage tank (1), a circulation pump (2), a first circulation control valve (3), a second circulation control valve (4), a liquid replenishment unit, and a control system; The input end of the circulating pump (2) is connected to the liquid storage tank (1), and its output end is connected to the first circulating control valve (3), the cooling capacity distribution unit (101) of the liquid cooling system and the secondary side system (102) of the liquid cooling system, respectively. The first circulation control valve (3) and the cold energy distribution unit (101) are both connected to the liquid storage tank (1), and a second circulation control valve (4) is provided between the cold energy distribution unit (101) and the liquid storage tank (1); The replenishment unit is provided between the circulating pump (2) and the secondary system (102). The replenishment unit includes a pressure sensor (5), a first replenishment control valve (6), and a second replenishment control valve (7), wherein: The pressure sensor (5) and the first replenishment control valve (6) are connected in series on the pipeline between the circulating pump (2) and the secondary side system (102), and the pressure sensor (5) is located between the first replenishment control valve (6) and the secondary side system (102); The input end of the second replenishment control valve (7) is connected to the first replenishment control valve (6) through a pipeline, and its output end is connected to the liquid storage tank (1); The control system is electrically connected to the circulating pump (2), the first circulating control valve (3), the second circulating control valve (4), and the replenishment unit, respectively.

2. The automatic pressure-stabilizing and fluid-replenishing system according to claim 1, characterized in that, The storage tank (1) is equipped with an ultraviolet germicidal lamp (8), a pH meter (9), a conductivity sensor (10) and a liquid level sensor (11) that are electrically connected to the control system; The pH meter (9) is used to detect the pH value of the water, the conductivity sensor (10) is used to detect the conductivity of the water, and the liquid level sensor (11) is used to monitor the liquid level in the storage tank (1).

3. The automatic pressure stabilizing and fluid replenishment system according to claim 1, characterized in that, It also includes a filtration unit connected in series in the pipeline between the liquid storage tank (1) and the circulation pump (2).

4. The automatic pressure stabilizing and fluid replenishment system according to claim 3, characterized in that, The filtration unit includes any one of a mesh filter, a cartridge filter, and a pre-filter.

5. The automatic pressure-stabilizing and fluid-replenishing system according to claim 1, characterized in that, A first manual control valve (12) is provided on the pipeline between the circulating pump (2) and the cooling capacity distribution unit (101).

6. The automatic pressure-stabilizing and fluid-replenishing system according to claim 1, characterized in that, The cooling capacity distribution unit (101) is equipped with a float switch (13), which is electrically connected to the control system and is used to monitor the liquid level of the cooling capacity distribution unit (101).

7. The automatic pressure-stabilizing and fluid-replenishing system according to claim 1, characterized in that, The fluid replenishment unit also includes a second manual control valve (14) and a third manual control valve (15), wherein: The second manual control valve (14) is connected in series in the pipeline between the pressure sensor (5) and the first replenishment control valve (6); The third manual control valve (15) is connected in series in the pipeline between the circulating pump (2) and the first replenishment control valve (6); The input end of the second replenishment control valve (7) is connected to the pipeline between the third manual control valve (15) and the first replenishment control valve (6).

8. The automatic pressure-stabilizing and fluid-replenishing system according to claim 7, characterized in that, The replenishment unit also includes a drain valve (16), which is connected in series in the pipeline between the pressure sensor (5) and the secondary system (102).

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