Differential pressure bypass device for sub-catchment device of variable-flow liquid cooling system

Abstract

The invention provides a pressure difference bypass device for a water distributing and collecting device of a variable-flow liquid cooling system, and relates to the field of variable-flow liquid cooling systems, the pressure difference bypass device comprises a main water inlet collecting pipe, a water distributing device main body, a main input pipe and a connecting pipe, the main water inlet collecting pipe is communicated with the water segregator main body through the connecting pipe, and the main input pipe is connected with the main water inlet collecting pipe. On the basis of real-time data of the pressure difference detector and the backflow flow speed detector, the central control unit dynamically adjusts the opening degree of the intelligent flow speed adjusting valve through a PID algorithm, so that the flow of a main loop is accurately matched with the requirements of branches, and redundant energy consumption of a traditional constant flow system is eliminated. And a system health degree evaluation model is constructed, when the branch flow is lower than a preset safety threshold value, the stabilized pressure pump is triggered to be shut down for protection, and the cavitation risk is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of variable flow liquid cooling systems, specifically a variable flow liquid cooling system's distribution header pressure differential bypass device. BACKGROUND

[0002] With the rapid development of information technology, data centers, electric vehicle energy storage systems, and various high-power power electronic devices have an increasing demand for efficient and reliable cooling solutions. Liquid cooling systems, as an advanced thermal management technology, are widely used in these fields due to their efficient heat dissipation performance and flexible application scenarios. In a liquid cooling system, the distribution header is a core hydraulic distribution and collection component responsible for distributing cooling liquid to each end device as needed and collecting the returned cooling liquid. Its performance directly affects the efficiency and stability of the entire liquid cooling system.

[0003] Traditional liquid cooling distribution headers can meet the basic distribution and collection functions, but when faced with variable flow liquid cooling systems, they often have problems such as inaccurate pressure differential control and slow response speed. In a variable flow system, the flow of cooling liquid is dynamically adjusted according to the actual thermal load, which requires the distribution header to have precise pressure differential control capabilities to ensure stable system operation and avoid energy waste. However, existing distribution header pressure differential bypass devices often fail to meet this demand, resulting in unstable system performance, high energy consumption, and even potential equipment failures.

[0004] Traditional pressure differential bypass devices usually use simple mechanical adjustment methods, making it difficult to achieve precise control of the distribution header pressure differential. This leads to large pressure differential fluctuations when the cooling liquid flow changes in a variable flow system, affecting the stability and cooling effect of the system. SUMMARY

[0005] (I) Technical problems solved

[0006] To address the shortcomings of the prior art, the present application provides a variable flow liquid cooling system's distribution header pressure differential bypass device, aiming to solve the problems of slow adjustment response, low precision, inability to recycle bypass flow, high system energy consumption, and other issues in the prior art.

[0007] (II) Technical solutions

[0008] In order to achieve the above object, the present application is realized by the following technical scheme: A variable flow liquid cooling system's distribution water collector pressure difference bypass device, comprising a main water inlet header, a water collector main body, a total input pipe and a connecting pipe, the water collector main body is located below the main water inlet header, the main water inlet header and the water collector main body are communicated through the connecting pipe, the total input pipe is connected with the main water inlet header, the total input pipe and the main water inlet header pipe opening are connected through flanges, the bottom and side of the water collector main body are provided with a plurality of branch interfaces, the branch interfaces can be connected with a plurality of shunt components, the shunt components comprise a distribution water pipe, the distribution water pipe is arranged at a position lower than the main water inlet header, one side of the distribution water pipe is provided with a backflow input interface opening outward, the bottom of the total input pipe is provided with a plurality of arrayed backflow pipe interfaces, a backflow pressure stabilizing component is installed between the backflow input interface and the backflow pipe interface, and the backflow pressure stabilizing component has the effect of stabilizing backflow.

[0009] Further, the shunt component further comprises a flow distribution connector provided at the top end of the distribution water pipe, and a branch connecting pipe is connected to the top end of the flow distribution connector.

[0010] Further, a branch output pipe is connected to the bottom of the distribution water pipe, and the branch output pipe distributes the cooling liquid to the branch system.

[0011] Further, a pressure difference detector is installed on the back of the distribution water pipe.

[0012] Further, an intelligent flow rate regulating valve is installed at the top end of the main water inlet header, a measuring ring is installed on one side of the outer end surface of the total input pipe, and a total pipe temperature detector is installed and connected to the top end of the measuring ring.

[0013] Further, the backflow pressure stabilizing component further comprises a backflow connector capable of being installed and connected with the backflow input interface, a backflow pipeline is installed and connected on one side of the backflow connector, and a backflow flow rate detector is installed at the installation connection port of the backflow pipeline and the backflow connector.

[0014] Further, a pressure stabilizing pump is installed and connected to the output end of the backflow pipeline, a pressure stabilizing pipeline is installed and connected to the output end of the pressure stabilizing pump, and the pressure stabilizing pipeline is flange-connected with the backflow pipe interface.

[0015] Further, a control connector is installed on one side of the water collector main body, and an anti-seismic support plate is installed between the control connector and the water collector main body to have the effect of stable support.

[0016] (Three) beneficial effects

[0017] The present application provides a variable flow liquid cooling system's distribution water collector pressure difference bypass device.

[0018] Advantages:

[0019] 1. Based on the real-time data of the differential pressure detector and the backflow flow rate detector, the central control unit dynamically adjusts the opening degree of the intelligent flow rate regulating valve through the PID algorithm, so that the main loop flow rate is accurately matched with the demand of the branch, and the redundant energy consumption of the traditional fixed flow system is eliminated.

[0020] 2. The differential pressure, flow rate and temperature are integrated for three-dimensional monitoring, a system health evaluation model is constructed, when the branch flow rate is lower than the preset safety threshold, the stable pressure pump is triggered to stop protection, and the cavitation risk is avoided.

[0021] 3. The temperature detection response time of the main pipe temperature detector is shortened by measuring the ring-in-ring annular heat exchange sheet, and the temperature detection precision is further improved, which provides a reliable basis for cooling strategy adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of the appearance structure of the present application;

[0023] Figure 2 is a schematic view of the front structure of the present application;

[0024] Figure 3 is a schematic view of the front structure of the present application;

[0025] Figure 4 is a schematic view of the test structure of the present application;

[0026] Figure 5 is a schematic view of the bottom structure of the present application.

[0027] In the figure: 101, main water inlet header; 102, intelligent flow rate regulating valve; 103, anti-vibration support plate; 104, control connector; 105, water distributor main body; 106, branch connection pipe; 107, flow distribution connector; 108, branch water collector; 109, backflow input interface; 110, branch output pipe; 111, backflow connector; 112, backflow flow rate detector; 113, backflow pipe; 114, stable pressure pump; 116, stable pressure pipe; 117, total input pipe; 118, measuring ring; 119, main pipe temperature detector; 120, connecting pipe; 121, differential pressure detector; 122, branch interface; 123, backflow pipe interface; 1001, flow distribution assembly; 1002, backflow stable pressure assembly. DETAILED DESCRIPTION

[0028] The embodiment of the present application provides a variable flow liquid cooling system branch collector differential pressure bypass device, like Figures 1-5As shown, including the main water inlet manifold 101, distributor main body 105, total input pipe 117 and connecting pipe 120, the distributor main body 105 is located below the main water inlet manifold 101, the main water inlet manifold 101 and the distributor main body 105 are communicated by the connecting pipe 120, the total input pipe 117 is connected with the main water inlet manifold 101, the total input pipe 117 and the main water inlet manifold 101 are connected by flange, the bottom and side of the distributor main body 105 are provided with a plurality of branch interfaces 122, the branch interfaces 122 can be connected with a plurality of shunt assemblies 1001, the shunt assembly 1001 includes a sub-distribution pipe 108, the sub-distribution pipe 108 is arranged at a position lower than the main water inlet manifold 101, one side of the sub-distribution pipe 108 is provided with a backflow input interface 109 opening outward, the bottom of the total input pipe 117 is provided with a plurality of arrayed backflow pipe interfaces 123, the backflow input interface 109 and the backflow pipe interface 123 are installed with a backflow pressure stabilizing assembly 1002, the backflow pressure stabilizing assembly 1002 has the effect of stabilizing backflow.

[0029] It needs to be further explained that the distributor main body 105 is higher than the sub-distribution pipe 108, and the principle of hot water rising and cold water sinking is used to form a circulating power.

[0030] Further, the shunt assembly 1001 further includes a flow distribution connector 107 arranged at the top end of the sub-distribution pipe 108, the top end of the flow distribution connector 107 is communicated and provided with a branch connecting pipe 106, and the branch connecting pipe 106 is installed and connected with the branch interface 122.

[0031] Further, the sub-distribution pipe 108 is communicated and provided with a branch output pipe 110 at the bottom, and the branch output pipe 110 distributes the cooling liquid to the branch system.

[0032] Further, the sub-distribution pipe 108 is installed with a differential pressure detector 121 at the back.

[0033] It needs to be further explained that the differential pressure detector 121 detects the flow pressure in the sub-distribution pipe 108.

[0034] Further, the main water inlet manifold 101 is installed with an intelligent flow rate regulating valve 102 at the top end, the total input pipe 117 is installed with a measuring ring 118 at one side of the outer end face, and the top end of the measuring ring 118 is installed and connected with a total pipe temperature detector 119.

[0035] It needs to be explained that the inner ring of the measuring ring 118 and the total input pipe 117 installed and connected position is provided with annular heat exchange fins, which is used to improve the cooling water temperature detection accuracy in the total input pipe 117.

[0036] It needs to be further explained that the intelligent flow rate regulating valve 102 is provided with a flow rate sensor for detecting the flow rate in the main water inlet header 101, and the intelligent flow rate regulating valve 102 adjusts the flow rate in the main water inlet header 101, and the total pipe temperature detector 119 is used to monitor the return water temperature.

[0037] Further, the backflow pressure stabilizing assembly 1002 further comprises a backflow connector 111 capable of being connected with the backflow input interface 109, and the backflow connector 111 is connected with a backflow pipeline 113 on one side, and the backflow pipeline 113 is provided with a backflow flow rate detector 112 at the connection port of the backflow connector 111.

[0038] It needs to be further explained that the backflow flow rate detector 112 is used to detect the flow rate of the liquid flowing through the backflow pipeline 113.

[0039] Further, the backflow pipeline 113 is connected with a pressure stabilizing pump 114 at the output end, the pressure stabilizing pump 114 is connected with a pressure stabilizing pipeline 116 at the output end, and the pressure stabilizing pipeline 116 is connected with the backflow pipe interface 123 through the flange.

[0040] It needs to be further explained that the pressure stabilizing pump 114 starts the backflow program according to the control signal, and when receiving the backflow control signal, the pressure stabilizing pump 114 is started, and the excess cooling water in the distribution header 108 is pumped into the backflow pipeline 113, and is output upward through the pressure stabilizing pipeline 116 to the backflow pipe interface 123, and is flowed back to the total input pipe 117 to be combined with the total input cooling water, and then the cooling water supply work is carried out.

[0041] Further, the water distributor main body 105 is connected with a control connector 104 on one side, and an anti-vibration support plate 103 is installed between the control connector 104 and the water distributor main body 105 to achieve stable support.

[0042] It needs to be further explained that the control connector 104 is provided with a central control unit, and is connected with the intelligent flow rate regulating valve 102, the total pipe temperature detector 119, the backflow flow rate detector 112, the pressure difference detector 121 and the pressure stabilizing pump 114 for signal control, and through preset algorithm analysis of the cooling liquid flow rate, pressure and temperature parameters, the system demand is dynamically calculated, and the start-stop instruction is sent to the pressure stabilizing pump 114, and the intelligent flow rate regulating valve 102 connected with the main water inlet header 101 is adjusted to maintain the set pressure difference.

[0043] The use method of the scheme is as follows:

[0044] S1, preset system target parameters through the control connector 104, main circuit pressure difference threshold, total return water temperature threshold, branch minimum flow demand, then open the cooling liquid supply of the total input pipe 117, and start the intelligent flow rate regulating valve 102 to the initial opening degree.

[0045] Step 2, the main pipe temperature detector 119 monitors the return water temperature in real time, and improves the temperature measurement accuracy by measuring the heat exchange sheet in the measuring ring 118;

[0046] Each branch differential pressure detector 121 synchronously collects the differential pressure of the inlet and outlet of the distribution pipe 108;

[0047] The return flow rate detector 112 continuously feeds the flow data of the return pipe 113 to the central control unit.

[0048] Step 3, when the differential pressure of the inlet and outlet of any shunt assembly 1001 is lower than the required flow, the central control unit executes and sends a start instruction to the corresponding constant pressure pump 114;

[0049] The excess cooling liquid is pumped out of the distribution pipe 108 through the return pipe 113;

[0050] The excess cooling liquid is injected into the main input pipe 117 through the constant pressure pipe 116 to realize recycling;

[0051] If the outlet differential pressure of the shunt assembly 1001 increases, the control unit dynamically increases the opening of the intelligent flow rate regulating valve 102 to increase the main flow;

[0052] If the shunt assembly 1001 triggers bypass at the same time and continues to timeout, the main water inlet manifold 101 flow supply is automatically reduced.

[0053] Step 4, the vertical height difference between the water distributor main body 105 and the distribution pipe 108 promotes the high-temperature return water to rise to the water distributor main body 105 and the low-temperature cooling liquid to sink to the distribution pipe 108, forming a natural circulation power and reducing the energy consumption of the constant pressure pump 114.

[0054] Step 5, when the branch flow is lower than the preset minimum safety flow threshold, or the differential pressure detector (121) signal is abnormal, or the return flow rate detector (112) detects abnormal flow, the central control unit considers it as an abnormal working condition, at this time the central control unit automatically stops the constant pressure pump (114) corresponding to the branch.

[0055] Step 6, the central control unit dynamically optimizes the adaptive adjustment of the differential pressure threshold based on historical operation data through a machine learning algorithm, and matches the corresponding strategy of the start-stop frequency of the constant pressure pump 114 and the opening of the main valve.

[0056] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A differential pressure bypass device for a variable flow liquid cooling system's distribution header, comprising a main inlet header (101), a distribution header body (105), a total inlet pipe (117) and a connection pipe (120), characterized in that: The water distributor body (105) is located below the main water inlet header (101), and the main water inlet header (101) and the water distributor body (105) are communicated through the connecting pipe (120), the total input pipe (117) is connected with the main water inlet header (101), the total input pipe (117) and the main water inlet header (101) are connected through flanges, the bottom and the side of the water distributor body (105) are provided with a plurality of branch interfaces (122), the branch interfaces (122) can be connected with a plurality of shunt assemblies (1001), the shunt assembly (1001) comprises a branch water collecting pipe (108), the branch water collecting pipe (108) is arranged at a position lower than the main water inlet header (101), one side of the branch water collecting pipe (108) is provided with a backflow input interface (109) opening outward, the bottom of the total input pipe (117) is provided with a plurality of arrayed backflow pipe interfaces (123), the backflow input interface (109) and the backflow pipe interface (123) are provided with a backflow pressure stabilizing assembly (1002) mounted therebetween, and the backflow pressure stabilizing assembly (1002) has the effect of stabilizing backflow.

2. A variable flow liquid cooling system header pressure differential bypass device according to claim 1, wherein: The shunt assembly (1001) further comprises a flow distribution connector (107) arranged at the top end of the branch water collecting pipe (108), and the top end of the flow distribution connector (107) is provided with a branch connecting pipe (106) in communication.

3. A variable flow liquid cooling system header pressure differential bypass device according to claim 1, wherein: The bottom of the branch water collecting pipe (108) is provided with a branch output pipe (110) in communication.

4. The variable flow liquid cooling system header pressure differential bypass device of claim 1, wherein: The back of the branch water collecting pipe (108) is provided with a differential pressure detector (121).

5. A variable flow liquid cooling system header pressure differential bypass device according to claim 1, wherein: The top end of the main water inlet header (101) is provided with an intelligent flow rate regulating valve (102), one side of the outer end face of the total input pipe (117) is provided with a measuring ring (118), and the top end of the measuring ring (118) is provided with a total pipe temperature detector (119) connected and mounted.

6. A variable flow liquid cooling system header pressure differential bypass device according to claim 1, wherein: The backflow stabilizing assembly (1002) further comprises a backflow connector (111) capable of being mounted and connected with the backflow input interface (109).

7. A variable flow liquid cooling system header pressure differential bypass device according to claim 6, wherein: One side of the backflow connector (111) is provided with a backflow pipe (113) connected and mounted, and the backflow pipe (113) is provided with a backflow flow rate detector (112) at the mounting connection port of the backflow connector (111).

8. A variable flow liquid cooling system header pressure differential bypass device according to claim 7, wherein: The output end of the backflow pipe (113) is provided with a pressure stabilizing pump (114) connected and mounted, the output end of the pressure stabilizing pump (114) is provided with a pressure stabilizing pipe (116) connected and mounted, and the pressure stabilizing pipe (116) is flange-connected with the backflow pipe interface (123).

9. A variable flow liquid cooling system header pressure differential bypass device according to claim 1, wherein: One side of the water distributor body (105) is provided with a control connector (104), and an anti-seismic support plate (103) is mounted between the control connector (104) and the water distributor body (105).

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