Cooling water cooling plate of liquid cooling server

Abstract

The utility model discloses a heat dissipation water cooling plate of a liquid cooling server, which comprises a water cooling plate body, a water flow channel is arranged in the water cooling plate body, a water inlet and a water outlet are arranged on one side of the water cooling plate body, and a slow flow cavity, a shunting channel, a multi-stage sub flow channel, a confluence cavity and a horn mouth-shaped diversion cone are arranged in the water flow channel; the multi-stage sub-flow channels comprise at least two sub-flow channels, one end of the slow flow cavity is connected with the water inlet, the other end of the slow flow cavity is connected with the flow dividing channel, the flow dividing channel is connected with the inlets of the multi-stage sub-flow channels to divide cooling liquid into the multi-stage sub-flow channels, and the outlets of the multi-stage sub-flow channels are connected with one end of the confluence cavity; the other end of the confluence cavity is connected with one end of the horn-mouth-shaped flow guide cone, and the other end of the horn-mouth-shaped flow guide cone is connected with the water outlet. According to the water-cooling plate, the multiple stages of sub-flow channels are arranged in the water flow channel, the speed and the volume flow rate of cooling water in the adjacent sub-flow channels are close through multiple times of flow division, the heat dissipation effect in the direction perpendicular to the water flow direction is balanced, the heat dissipation effect is good, cooling liquid can pass through the whole water-cooling plate body at a stable speed and stable pressure, and the cooling efficiency is improved. And after sufficient heat exchange, the water is discharged from the water outlet.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology, and more specifically to a liquid-cooled server heat dissipation water cooling plate. Background Technology

[0002] In an era of continuously improving electronic device performance, high-density servers are developing rapidly, and the heat generated during operation has become a key factor affecting their performance, stability, and lifespan. While traditional air-cooling technology has solved the heat dissipation problem to some extent, its limitations are gradually becoming apparent as chip thermal design power (TDP) continues to rise and devices strive for miniaturization and high performance. Liquid cooling technology, on the other hand, has gradually become mainstream due to its high heat dissipation efficiency and low energy consumption, and is widely used in many fields such as data centers, new energy, and 5G communications.

[0003] Water cooling, as an important branch of liquid cooling, exhibits superior heat dissipation performance due to the fact that liquids dissipate heat much faster than air. A complete water cooling system typically consists of components such as a water block, circulating fluid, a water pump, piping, and a tank or heat exchanger. Among these, the water cooling plate (also known as a liquid cooling plate) is the core component and plays a crucial role in the entire cooling system. The water cooling plate is used to absorb heat from key heat-generating components such as the CPU, northbridge, and graphics card.

[0004] Despite significant progress in water-cooling technology, existing water-cooled plates still suffer from several problems. Traditional water-cooled plates often employ a single-path circulation design, such as U-shaped or S-shaped flow channels. This results in insufficient fluid flow within the plate's interior, with liquid that has already undergone heat transfer failing to drain in time, while liquid that has not yet undergone sufficient heat transfer is prematurely expelled. This significantly impacts the heat dissipation efficiency of the water-cooled plate, leading to uneven heat dissipation and low cooling capacity utilization under high-load conditions. For example, patent application CN205546395U discloses a multi-channel combined water-cooled plate. The plate consists of at least two pipes, each bent according to the flow channel shape and then arranged side-by-side to form the plate. The bent portion of this structure is U-shaped. Although multiple pipes are combined to disperse the coolant, the overall flow channel is primarily linear. This results in the coolant remaining on the water-cooled plate for too short a time, preventing the coolant from fully absorbing sufficient heat from the heat-generating components. Utility Model Content

[0005] In order to obtain a water-cooled plate with excellent heat dissipation performance, this utility model proposes a liquid-cooled server heat dissipation water-cooled plate, which divides the water flow channel into multiple sub-channels, so that the coolant entering the water-cooled plate body can be evenly distributed. This distribution design greatly increases the contact area between the coolant and the inner wall of the water-cooled plate, so that the coolant can more fully absorb the heat transferred from the device to the water-cooled plate.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A liquid-cooled server heat dissipation water cooling plate includes: a water cooling plate body, a water flow channel provided inside the water cooling plate body, an inlet and an outlet provided on one side of the water cooling plate body, and a slow flow cavity, a flow distribution path, a multi-stage sub-flow channel, a confluence cavity, and a horn-shaped flow guide cone provided inside the water flow channel;

[0008] The cross-section of the slow-flow cavity is rectangular. The coolant reduces the inlet velocity through the slow-flow cavity, thereby achieving uniform distribution of coolant pressure.

[0009] The coolant is diverted to the multi-stage sub-channels through at least one diversion in the diversion path;

[0010] The multi-stage sub-channel includes at least two sub-channels;

[0011] The cross-section of the manifold is trapezoidal, which collects the coolant in the multi-stage sub-channels;

[0012] The funnel-shaped guide cone smoothly guides the coolant from the manifold to the outlet.

[0013] One end of the slow-flow cavity is connected to the water inlet, and the other end of the slow-flow cavity is connected to the diversion channel. The diversion channel is connected to the inlet of the multi-stage sub-channel to divert the coolant to the multi-stage sub-channel. The outlet of the multi-stage sub-channel is connected to one end of the confluence cavity, and the other end of the confluence cavity is connected to one end of the flared guide cone. The other end of the flared guide cone is connected to the water outlet.

[0014] As a further improvement of the technical solution of this application, the diversion channel includes a T-shaped diversion channel and a Y-shaped diversion channel. The inlet is connected to the T-shaped diversion channel for equal diversion, and then the two Y-shaped diversion channels are connected in parallel to the two outlets of the T-shaped diversion channel for further diversion.

[0015] The multi-level sub-channels include a first sub-channel, a second sub-channel, a third sub-channel, and a fourth sub-channel;

[0016] The coolant is diverted into the multi-stage sub-channels through two diversions in the diversion path. The first diversion section includes a T-shaped diversion path, which achieves a first diversion. The first diversion causes the coolant to flow out of the slow-flow chamber and then be evenly divided into two parallel branches at the T-shaped diversion path. The second diversion section includes a Y-shaped diversion path, which achieves a second diversion. The second diversion causes the coolant to flow out of the T-shaped diversion path and then be evenly divided into four parallel branches at the Y-shaped diversion path. The four parallel branches enter the first sub-channel, the second sub-channel, the third sub-channel, and the fourth sub-channel, respectively.

[0017] As a further improvement of this application, at least one shunt voltage regulation path is provided at one end of the multi-level sub-channels near the shunt path. The shunt voltage regulation path is a path that connects the first sub-channel with the second sub-channel, the second sub-channel with the third sub-channel, and the third sub-channel with the fourth sub-channel.

[0018] As a further improvement of this application, two shunt voltage regulation paths are provided on the multi-stage sub-channel, namely the first shunt voltage regulation path and the second shunt voltage regulation path.

[0019] The coolant is divided into three and four sub-flows in the two sub-flow and pressure-stabilizing channels respectively. The third sub-flow section includes the first sub-flow and pressure-stabilizing channel. The three sub-flows are achieved through the third sub-flow section. The three sub-flows make the coolant flow out from the Y-shaped sub-flow channel and then undergo a first-stage water pressure balance at the first sub-flow and pressure-stabilizing channel before being uniformly sub-flowed into the multi-stage sub-flow channels again.

[0020] The fourth diversion section includes the second diversion and pressure stabilization path. The fourth diversion section achieves four diversions, which cause the coolant to flow out from the first diversion and pressure stabilization path, undergo a second-stage water pressure balance at the second diversion and pressure stabilization path, and then be uniformly diverted into the multi-stage sub-channels again.

[0021] As a further improvement to this application, the sum of the widths of all sub-channels in the multi-level sub-channel is d. sum ;

[0022] The distance between the first shunt voltage regulating path and the slow-flow cavity is d1, d sum ≤d1≤2d sum ;

[0023] The distance between the second shunt voltage regulating path and the slow-flow cavity is d2.

[0024] As a further improvement of the technical solution of this application, the multi-level sub-channels are arranged in an S-shape, and each sub-channel of the multi-level sub-channels is an S-shaped passage.

[0025] As a further improvement of the technical solution of this application, the S-shaped passage includes continuously arranged S-shaped bending sections, the bending radius of the S-shaped bending sections is 1.0 to 2.0 times the width of the sub-channels of the multi-level sub-channels, and the bending angle is 30° or 150°.

[0026] As a further improvement of this application, the cross-sectional area of ​​the manifold is 1.1 times the sum of the cross-sectional areas of all the sub-channels of the multi-level sub-channel.

[0027] As a further improvement to the technical solution of this application, the water inlet and the water outlet are connected by quick-connect fittings or threaded interfaces.

[0028] Compared with the prior art, the beneficial effects of this application are:

[0029] This application provides a liquid-cooled server heat dissipation water-cooling plate with efficient heat distribution and increased heat exchange area: A diversion path is set within the water flow channel, dividing the channel into a first sub-channel, a second sub-channel, a third sub-channel, and a fourth sub-channel through primary and secondary diversion, ensuring uniform distribution of the coolant entering the water-cooling plate body. This diversion design significantly increases the contact area between the coolant and the inner wall of the water-cooling plate, allowing the coolant to more fully absorb the heat transferred from the equipment to the water-cooling plate, significantly improving heat exchange efficiency, effectively reducing the operating temperature of electronic equipment, and ensuring its stable and efficient operation.

[0030] The existence of the first and second flow rate stabilization paths enables tertiary and quadruple flow splitting, ensuring that the coolant flows at a stable speed and pressure in each sub-channel. This avoids uneven heat dissipation caused by fluctuations in water flow speed and pressure, allowing the water-cooled plate to maintain stable heat dissipation performance during long-term operation, extending the service life of electronic equipment, and reducing the risk of equipment failure due to unstable heat dissipation.

[0031] The S-shaped water flow path induces a turbulent mixing state in the coolant during flow, breaking the laminar flow state and generating strong convection and disturbance within the coolant. This turbulent mixing accelerates heat transfer, allowing the hot and cold fluids in the coolant to mix thoroughly, further improving heat exchange efficiency. Compared to traditional straight flow channels, this allows the water-cooled plate to achieve more efficient heat dissipation with the same volume and coolant flow rate.

[0032] The multi-stage sub-channel system comprises four sub-channels. Through the coordinated operation of these sub-channels and different functional pathways, a scientifically sound heat dissipation path is constructed. After entering through the inlet, the coolant undergoes processes such as flow distribution, pressure and speed stabilization, and turbulent mixing. It completes thorough heat exchange within the water-cooled plate body before exiting through the outlet. The entire process is smooth and efficient, significantly improving the overall heat dissipation performance of the water-cooled plate and meeting the stringent requirements of modern equipment for high-efficiency heat dissipation. It also provides strong support for the miniaturization and high-performance design of equipment. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a three-dimensional structural diagram of a liquid-cooled server heat dissipation water cooling plate.

[0035] Figure 2 This is a side view of a liquid-cooled server heat dissipation water cooling plate.

[0036] Figure 3 This is a three-dimensional schematic diagram of the internal structure of a liquid-cooled server heat dissipation water cooling plate.

[0037] Figure 4 This is a partially enlarged structural diagram of one end of the water inlet of a liquid-cooled server heat dissipation water cooling plate.

[0038] Figure 5 This is a partially enlarged structural diagram of one end of the water outlet of a liquid-cooled server heat dissipation water cooling plate.

[0039] Figure label:

[0040] 100. Water-cooled plate body; 200. Water flow channel; 210. Flow buffer cavity; 220. Flow branching path; 221. T-shaped flow branching path; 222. Y-shaped flow branching path; 230. Multi-stage sub-flow channels; 231. First sub-flow channel; 232. Second sub-flow channel; 233. Third sub-flow channel; 234. Fourth sub-flow channel; 240. Merging cavity; 250. Trumpet-shaped guide cone; 260. Flow branching and pressure stabilizing path; 261. First flow branching and pressure stabilizing path; 262. Second flow branching and pressure stabilizing path; 300. Water inlet; 400. Water outlet. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The embodiments of this application will now be described based on its overall structure.

[0043] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0044] See Figure 1-3 A liquid-cooled server heat dissipation water-cooling plate includes: a water-cooling plate body 100, a water flow channel 200 inside the water-cooling plate body 100, an inlet 300 and an outlet 400 on one side of the water-cooling plate body 100, and a flow channel 200 having a slow flow cavity 210, a diversion channel 220, a multi-stage sub-channel 230, a confluence cavity 240, and a flared guide cone 240; the slow flow cavity 210 has a rectangular cross-section, and the coolant reduces the inlet flow velocity through the slow flow cavity 210 to achieve uniform distribution of coolant pressure; the coolant is diverted to the multi-stage sub-channel 230 through at least one diversion in the diversion channel 220; the multi-stage sub-channel 230 includes at least two sub-channels; the confluence cavity 240 has a trapezoidal cross-section, and collects the coolant in the multi-stage sub-channel 230; the flared guide cone 250 smoothly guides the coolant from the confluence cavity 240 to the outlet 400.

[0045] One end of the slow-flow chamber 210 is connected to the inlet 300, and the other end of the slow-flow chamber 210 is connected to the diversion channel 220. The diversion channel 220 is connected to the inlet of the multi-stage sub-channel 230 to divert the coolant to the multi-stage sub-channel 230. The outlet of the multi-stage sub-channel 230 is connected to one end of the manifold 240, and the other end of the manifold 240 is connected to one end of the flared guide cone 250. The other end of the flared guide cone 250 is connected to the outlet 400.

[0046] In this embodiment, the water-cooled plate body 100 is made of a metal material with excellent thermal conductivity, such as pure copper, aluminum alloy, or copper-aluminum composite material. It is a flat plate that is easy to fit onto the surface of the heat-generating equipment or heat exchanger. The water-cooled plate body 100 includes an upper plate and a lower plate, which are brazed together to form a closed water flow channel 200 inside.

[0047] The diversion path 220 is set in the water flow channel 200. After the coolant enters from the inlet 300, it first passes through the slow flow chamber 210 to buffer the coolant pressure. Then, the water flow channel is divided into multiple branches by the primary and secondary diversion of the diversion path 220. In this embodiment, the coolant through the diversion path 220 is divided into at least two branches, so that the coolant entering the water-cooled plate body 100 can be evenly distributed. This diversion design greatly increases the contact area between the coolant and the inner wall of the water-cooled plate, so that the coolant can more fully absorb the heat transferred from the equipment to the water-cooled plate, significantly improve the heat exchange efficiency, effectively reduce the operating temperature of electronic equipment, and ensure its stable and efficient operation.

[0048] like Figure 3 and Figure 4 As shown, in order to improve the heat dissipation efficiency of the water-cooled plate, the flow distribution path includes a T-shaped flow distribution path 221 and a Y-shaped flow distribution path 222. The inlet 300 is connected to the T-shaped flow distribution path 221 for equal flow distribution, and then the two Y-shaped flow distribution paths 222 are connected in parallel to the two outlet ends of the T-shaped flow distribution path 221 for further flow distribution. The multi-stage sub-flow channel 230 includes a first sub-flow channel 231, a second sub-flow channel 232, a third sub-flow channel 233, and a fourth sub-flow channel 234.

[0049] The coolant is diverted into the multi-stage sub-channels 230 through two diversions in the diversion channel 220. The first diversion section includes a T-shaped diversion channel 221, which achieves a first diversion. The first diversion causes the coolant to flow out of the slow flow chamber 210 and then be evenly divided into two parallel branches at the T-shaped diversion channel 221. The second diversion section includes a Y-shaped diversion channel 222, which achieves a second diversion. The second diversion causes the coolant to flow out of the T-shaped diversion channel 221 and then be evenly divided into four parallel branches at the Y-shaped diversion channel 222. The four parallel branches enter the first sub-channel 231, the second sub-channel 232, the third sub-channel 233, and the fourth sub-channel 234, respectively.

[0050] In this embodiment, the flow distribution path 220 is provided with a T-shaped flow distribution path 221 and a Y-shaped flow distribution path 222. The multi-sub-channel flow distribution is achieved through the layout of the two flow distribution structures. A first flow distribution section is set at the inlet of the water flow channel. Its shape is a T-shaped guide structure, which evenly divides the coolant input from the inlet 300 into two branches. A second flow distribution section is set after the first flow distribution section. Its shape is a Y-shaped guide structure, which finally divides the main channel into four parallel sub-channels: the first sub-channel, the second sub-channel, the third sub-channel, and the fourth sub-channel.

[0051] The multi-stage sub-channel system comprises four sub-channels. Through the coordinated operation of these sub-channels and different functional pathways, a scientifically sound heat dissipation path is constructed. After entering through the inlet, the coolant undergoes processes such as flow distribution, pressure and speed stabilization, and turbulent mixing. It completes thorough heat exchange within the water-cooled plate body before exiting through the outlet. The entire process is smooth and efficient, significantly improving the overall heat dissipation performance of the water-cooled plate and meeting the stringent requirements of modern equipment for high-efficiency heat dissipation. It also provides strong support for the miniaturization and high-performance design of equipment.

[0052] The specific structure of the flow distribution section: The flow distribution angle of the first and second flow distribution sections is 45° to 60°. The width of the flow distribution port is matched according to the cross-sectional area of ​​the sub-flow channels. For example, the cross-sectional area of ​​the main channel is 1.2 times the sum of the cross-sectional areas of the sub-flow channels to ensure that the pressure loss of the coolant is minimized and the flow distribution is uniform with an error of ≤5% during flow distribution.

[0053] Flow channel cross-sectional area design: The first sub-flow channel 231, the second sub-flow channel 232, the third sub-flow channel 233, and the fourth sub-flow channel 234 adopt a uniform cross-section design, such as a rectangular cross-section, with a width of 2-5mm and a depth of 5-15mm, to ensure that the coolant does not accelerate or decelerate significantly during the flow process, maintains a stable Reynolds number, Re = 1000-2000, and is located in the transition zone between laminar and turbulent flow, taking into account both heat dissipation and pressure drop.

[0054] In the water-cooled plate, the coolant enters the multi-stage sub-channels 230 after passing through the distribution path 220. Uneven coolant velocity and pressure exist in each sub-channel, leading to heat dissipation performance issues. To solve this problem, such as... Figure 3 As shown, in this embodiment, at least one shunt voltage regulation path 260 is provided at one end of the multi-level sub-channel 230 near the shunt path 220. The shunt voltage regulation path 260 is a path that connects the first sub-channel 231 to the second sub-channel 232, the second sub-channel 232 to the third sub-channel 233, and the third sub-channel 233 to the fourth sub-channel 234.

[0055] The presence of the diversion and pressure stabilizing passage 260 ensures that the coolant flows at a stable speed and pressure in each sub-channel. The width of the diversion and pressure stabilizing passage 260 is greater than or equal to the width of the sub-channels of the multi-stage sub-channels, avoiding uneven local heat dissipation caused by fluctuations in water flow speed and pressure. This allows the water-cooled plate to maintain stable heat dissipation performance during long-term operation, extending the service life of electronic equipment and reducing the risk of equipment failure caused by unstable heat dissipation.

[0056] To further improve the consistency of coolant velocity and pressure in each sub-channel, in this embodiment, two flow-diverting and pressure-stabilizing paths 260 are provided on the multi-stage sub-channels, such as... Figure 3 As shown, these are the first shunt voltage regulation path 261 and the second shunt voltage regulation path 262, respectively.

[0057] Dimensional design of the 260 shunt voltage regulator circuit:

[0058] The width of each sub-channel in the multi-stage sub-channel 230 is d; the sum of the widths of all sub-channels in the multi-stage sub-channel 230 is d. sum ;

[0059] The distance between the first shunt voltage regulating passage 261 and the slow flow cavity 210 is d1, d sum ≤d1≤2d sum ;

[0060] The distance between the second shunt voltage regulating path 262 and the slow flow cavity 210 is d2. The distances between the second-stage shunt voltage regulating path and the first voltage regulating path and the slow flow cavity increase progressively. After two pressure and flow divisions, the fluid velocity and inlet pressure leading to the parallel sub-channels will tend to be the same.

[0061] The coolant is divided into three and four times in the two diversion and pressure stabilization channels 260 respectively. The third diversion section includes the first diversion and pressure stabilization channel 261. The three diversions are achieved through the third diversion section. The three diversions make the coolant flow out from the Y-shaped diversion channel 222 and then undergo the first stage of water pressure balancing in the first diversion and pressure stabilization channel 261 before being evenly diverted into the multi-stage sub-channels 230.

[0062] The fourth diversion section includes the second diversion and pressure stabilization passage 262. The fourth diversion section achieves four diversions. The four diversions cause the coolant to flow out from the first diversion and pressure stabilization passage 261, undergo a second-stage water pressure balance at the second diversion and pressure stabilization passage 262, and then be uniformly diverted into the multi-stage sub-channels 230.

[0063] In this embodiment, the setting of two shunt and voltage-stabilizing channels 260 further improves the consistency of coolant velocity and pressure in each sub-channel, avoiding the problem of uneven local heat dissipation caused by fluctuations in water flow velocity and pressure. This ensures that the water-cooled plate can maintain stable heat dissipation performance during long-term operation, extending the service life of electronic equipment and reducing the risk of equipment failure caused by unstable heat dissipation.

[0064] In this embodiment, the flow splitting angle of the third and fourth flow splitting sections is 45° to 60°, and the width of the flow splitting port is matched according to the cross-sectional area of ​​the sub-flow channels. For example, the cross-sectional area of ​​the main channel is 1.2 times the sum of the cross-sectional areas of the sub-flow channels to ensure that the pressure loss of the coolant is minimized and the flow distribution is uniform with an error of ≤5% during flow splitting.

[0065] like Figure 3 As shown, in this embodiment, the multi-level sub-channels are arranged in an S-shape, and each sub-channel of the multi-level sub-channels is an S-shaped path.

[0066] In this embodiment, the coolant (such as water-based antifreeze or mineral oil) enters from the inlet 300, passes through the slow-flow chamber 210 and enters the first branch section, where it is divided into two streams. Then, it is evenly distributed to the four sub-channels through the second, third, and fourth branch sections. The coolant flows through the sub-channels and generates turbulence as it passes through the S-shaped bend section, where it fully exchanges heat with the water-cooled plate body. The coolant that has completed heat exchange is collected in the outlet manifold and circulated by an external water pump and radiator to achieve continuous heat dissipation.

[0067] The S-shaped water flow path induces a turbulent mixing state in the coolant during flow, breaking the laminar flow state and generating strong convection and disturbance within the coolant. This turbulent mixing accelerates heat transfer, allowing the hot and cold fluids in the coolant to mix thoroughly, further improving heat exchange efficiency. Compared to traditional straight flow channels, this allows the water-cooled plate to achieve more efficient heat dissipation with the same volume and coolant flow rate.

[0068] Specifically, the S-shaped passage includes continuously arranged S-shaped bends, the bending radius of which is 1.0 to 2.0 times the width of the sub-channels of the multi-stage sub-channels, and the bending angle is 30° or 150°.

[0069] In this embodiment, the S-shaped bend generates centrifugal force in the coolant during flow, disrupting the boundary layer and forming turbulent mixing (turbulence intensity ≥15%), thereby enhancing heat exchange efficiency.

[0070] This water-cooled plate, with the same volume, has a 20%–30% lower thermal resistance than traditional DC water-cooled plates, and improved surface temperature uniformity. It is suitable for heat flux densities ≥100W / cm². 2 Heat dissipation scenarios for heat-generating equipment (such as data center servers, new energy vehicle motor controllers, 5G base station power amplifier modules, etc.).

[0071] In this embodiment, the water flow channel is equipped with a diversion path for water flow splitting, a flow velocity and pressure stabilization path for water flow channel to achieve stable water flow pressure and velocity, and an S-shaped water flow path for turbulent mixing of coolant to achieve sufficient heat exchange. Through the refined design of the diversion structure, pressure stabilization measures, and turbulence path, uniform distribution, stable flow, and efficient heat exchange of coolant are achieved. The sub-channels allow coolant to pass through the entire water-cooled plate body at a stable speed and pressure, and after sufficient heat exchange, it is discharged from the outlet, solving the problems of low heat dissipation efficiency and uneven temperature of traditional water-cooled plates. If it is necessary to adjust the number of sub-channels or the shape of the channel, the number of diversion sections and the S-shaped bending parameters can be optimized according to the actual heat dissipation requirements.

[0072] After the coolant flows through the 200-stage water flow channel and carries away the heat, it is collected in the manifold 240 from the multi-stage sub-channels 230. Figure 5 As shown, the cavity cross-section is trapezoidal or semi-circular, and the cross-sectional area of ​​the manifold 240 is 1.1 times the sum of the cross-sectional areas of all the sub-channels of the multi-stage sub-channel 230.

[0073] In this embodiment, a manifold 240 is provided inside the outlet 400 to collect the coolant from the four sub-channels and discharge it. The cross-sectional area of ​​the manifold 240 is 1.1 times the sum of the cross-sectional areas of the sub-channels to avoid backflow or sudden pressure drop at the outlet.

[0074] The inlet 300 and outlet 400 are located on the same side of the water-cooled plate body 100, and use quick-connect connectors or threaded interfaces for easy connection with external circulation pipelines.

[0075] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A liquid-cooled server heat dissipation water-cooling plate, characterized in that, include: The water-cooled plate body (100) has a water flow channel (200) inside the water-cooled plate body (100), and an inlet (300) and an outlet (400) are provided on one side of the water-cooled plate body (100). The water flow channel (200) is provided with a slow flow cavity (210), a diversion channel (220), a multi-stage sub-channel (230), a confluence cavity (240), and a trumpet-shaped guide cone (250). The cross-section of the slow-flow cavity (210) is rectangular. The coolant reduces the inlet velocity through the slow-flow cavity (210) to achieve uniform distribution of coolant pressure. The coolant is diverted to the multi-stage sub-channels (230) through at least one diversion in the diversion path (220); The multi-stage sub-channel (230) includes at least two sub-channels; The cross-section of the manifold (240) is trapezoidal, which collects the coolant in the multi-stage sub-channels (230); The flared guide cone (250) smoothly guides the coolant from the manifold (240) to the outlet (400); One end of the slow-flow cavity (210) is connected to the inlet (300), and the other end of the slow-flow cavity (210) is connected to the diversion channel (220). The diversion channel (220) is connected to the inlet of the multi-stage sub-channel (230) to divert the coolant to the multi-stage sub-channel (230). The outlet of the multi-stage sub-channel (230) is connected to one end of the confluence cavity (240), and the other end of the confluence cavity (240) is connected to one end of the flared guide cone (250). The other end of the flared guide cone (250) is connected to the outlet (400).

2. The liquid-cooled server heat dissipation water-cooling plate according to claim 1, characterized in that, The diversion path includes a T-shaped diversion path (221) and a Y-shaped diversion path (222). The inlet (300) is connected to the T-shaped diversion path (221) for equal diversion. Then, the two Y-shaped diversion paths (222) are connected in parallel to the two outlet ends of the T-shaped diversion path (221) for further diversion. The multi-stage sub-channel (230) includes a first sub-channel (231), a second sub-channel (232), a third sub-channel (233), and a fourth sub-channel (234); The coolant is diverted to the multi-stage sub-channels (230) through two diversions in the diversion channel (220). The first diversion section includes the T-shaped diversion channel (221), which achieves a first diversion. The first diversion causes the coolant to flow out of the slow-flow chamber (210) and then be evenly divided into two parallel branches at the T-shaped diversion channel (221). The second diversion section includes the Y-shaped diversion channel (222), which achieves a second diversion. The second diversion causes the coolant to flow out of the T-shaped diversion channel (221) and then be evenly divided into four parallel branches at the Y-shaped diversion channel (222). The four parallel branches enter the first sub-channel (231), the second sub-channel (232), the third sub-channel (233), and the fourth sub-channel (234), respectively.

3. The liquid-cooled server heat dissipation water-cooling plate according to claim 2, characterized in that, At least one shunt voltage regulation path (260) is provided on the multi-stage sub-channel (230) near the shunt path (220). The shunt voltage regulation path (260) is a path that connects the first sub-channel (231) to the second sub-channel (232), the second sub-channel (232) to the third sub-channel (233), and the third sub-channel (233) to the fourth sub-channel (234).

4. The liquid-cooled server heat dissipation water-cooling plate according to claim 3, characterized in that, Two shunt voltage regulation paths (260) are provided on the multi-stage sub-channel (230), namely the first shunt voltage regulation path (261) and the second shunt voltage regulation path (262); The coolant is divided into three and four sub-channels in two flow-dividing and pressure-stabilizing channels (260), respectively. The third sub-channel includes the first flow-dividing and pressure-stabilizing channel (261). The three sub-channels are used to achieve three sub-channels. The three sub-channels cause the coolant to flow out from the Y-shaped flow-dividing channel (222) and then undergo a first-stage water pressure balance in the first flow-dividing and pressure-stabilizing channel (261) before being uniformly sub-channeled into the multi-stage sub-channels (230). The fourth diversion section includes the second diversion and pressure stabilization passage (262). The fourth diversion section achieves four diversions, which cause the coolant to flow out from the first diversion and pressure stabilization passage (261), undergo a second-stage water pressure balance at the second diversion and pressure stabilization passage (262), and then be uniformly diverted into the multi-stage sub-channel (230).

5. A liquid-cooled server heat dissipation water-cooling plate according to claim 4, characterized in that, The sum of the widths of all sub-channels in the multi-stage sub-channel (230) is d. sum ; The distance between the first shunt voltage regulating path (261) and the slow-flow cavity (210) is d1, d sum ≤d1≤2d sum ; The distance between the second shunt voltage regulating path (262) and the slow-flow cavity (210) is d2.

6. A liquid-cooled server heat dissipation water-cooling plate according to claim 4, characterized in that, The multi-level sub-channels (230) are arranged in an S-shape, and each sub-channel of the multi-level sub-channels (230) is an S-shaped passage.

7. A liquid-cooled server heat dissipation water-cooling plate according to claim 6, characterized in that, The S-shaped passage includes continuously arranged S-shaped bends, the bending radius of which is 1.0 to 2.0 times the width of the sub-channel of the multi-level sub-channel, and the bending angle is 30° or 150°.

8. A liquid-cooled server heat dissipation water-cooling plate according to claim 1, characterized in that, The cross-sectional area of ​​the manifold (240) is 1.1 times the sum of the cross-sectional areas of all the sub-channels of the multi-level sub-channel (230).

9. A liquid-cooled server heat dissipation water-cooling plate according to claim 1, characterized in that, The inlet (300) and the outlet (400) are connected by quick-connect fittings or threaded interfaces.

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