Heat dissipation water-cooling plate of liquid cooling server and production method of heat dissipation water-cooling plate

Abstract

The invention discloses a liquid cooling server heat dissipation water cooling plate and a production method thereof, the water cooling plate comprises a water cooling plate body, a water flow channel is arranged in the water cooling plate body, one side of the water cooling plate body is provided with a water inlet and a water outlet, and the water flow channel is internally provided with a slow flow cavity, a shunting channel, a multi-stage sub flow channel, a confluence cavity and a horn mouth-shaped diversion cone; 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-runners are arranged in the water flow channel, the speed and the volume flow rate of cooling water in the adjacent sub-runners 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] The present invention relates to the field of heat dissipation technology, and more particularly to a liquid-cooled server heat dissipation water cooling plate and a production method thereof. Background Art

[0002] In today's era of continuous improvement in electronic device performance and the rapid development of high-density servers, the heat generated by these devices has become a key factor affecting their performance, stability, and lifespan. While traditional air cooling technology has addressed this issue to some extent, it is gradually becoming increasingly limited as chip thermal design power (TDP) continues to rise and devices pursue miniaturization and high performance. Liquid cooling, however, is becoming increasingly mainstream due to its advantages of high heat dissipation efficiency and low energy consumption, finding widespread application in numerous fields, including data centers, new energy, and 5G communications.

[0003] As a key branch of liquid cooling, water cooling offers exceptional heat dissipation, leveraging the fact that liquid dissipates heat much faster than air. A complete water cooling system typically consists of a water block, circulating fluid, a water pump, piping, and a water tank or heat exchanger. The water cooling plate (also known as a liquid cooling plate), a core component, plays a crucial role in the entire cooling system, absorbing heat from key heat-generating components such as the CPU, northbridge, and graphics card.

[0004] Although water-cooled heat dissipation technology has made significant progress, there are still some problems with water-cooled plates in the existing technology. Traditional water-cooled plates mostly adopt a single-path circulation design, such as a U-shaped or S-shaped flow channel, which makes the liquid flow in the inner cavity of the water-cooled plate not smooth enough. The liquid that has completed heat transfer fails to be discharged in time, while the liquid that has not fully transferred heat is sent out too early. This greatly affects the heat dissipation efficiency of the water-cooled plate. In high-load scenarios, there are problems such as uneven heat dissipation and low cooling capacity utilization. For example, the patent network discloses a multi-channel water-cooled plate with authorization number CN205546395U. The plate body is composed of at least two pipes. The pipes are bent one by one according to the shape of the flow channel, and then combined side by side to form a plate body. The bending part of the structure is U-shaped. Although a plurality of pipe combinations are used to disperse the coolant, the overall flow channel is mainly a straight line, resulting in the coolant staying in the water-cooled plate for too short a time, and the coolant cannot completely absorb enough heat from the heating component. Technical problem. Summary of the Invention

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

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A liquid cooling server heat dissipation water cooling plate, comprising: a water cooling plate body, a water flow channel provided inside the water cooling plate body, a water inlet and a water outlet provided on one side of the water cooling plate body, the water flow channel being provided with a slow flow cavity, a diversion channel, multi-stage sub-flow channels, a confluence cavity, and a trumpet-shaped guide cone;

[0008] The cross section of the slow flow cavity is rectangular, and the coolant passes through the slow flow cavity to reduce the inlet flow velocity, thereby achieving uniform distribution of the coolant pressure;

[0009] The cooling liquid is diverted to the multi-stage sub-flow channels through at least one diversion in the diversion channel;

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

[0011] The cross section of the confluence cavity is trapezoidal, and collects the coolant in the multi-stage sub-flow channels;

[0012] The bell-shaped guide cone guides the coolant smoothly from the confluence cavity to the water outlet;

[0013] One end of the slow flow chamber is connected to the water inlet, and the other end of the slow flow chamber is connected to the diversion path. The diversion path 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 chamber, and the other end of the confluence chamber is connected to one end of the trumpet-shaped guide cone, and the other end of the trumpet-shaped guide cone is connected to the water outlet.

[0014] As a further improved technical solution of the present application, the diversion passage includes a T-shaped diversion passage and a Y-shaped diversion passage, the water inlet is connected to the T-shaped diversion passage for equal diversion, and then the two Y-shaped diversion passages are connected in parallel to the two outlet ends of the T-shaped diversion passage for further diversion;

[0015] The multi-stage sub-flow channel includes a first sub-flow channel, a second sub-flow channel, a third sub-flow channel, and a fourth sub-flow channel;

[0016] The coolant is diverted to the multi-stage sub-channel through two diversions in the diversion channel, the first diversion section includes a T-shaped diversion channel, and a first diversion is achieved through the first diversion section. The first diversion allows the coolant to flow out of the slow flow cavity and then be evenly diverted into two parallel branches at the T-shaped diversion channel. The second diversion section includes a Y-shaped diversion channel, and a second diversion is achieved through the second diversion section. The secondary diversion allows the coolant to flow out of the T-shaped diversion channel and then be evenly diverted into four parallel branches again at the Y-shaped diversion channel. 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 improved technical solution of the present application, at least one shunt pressure-stabilizing passage is provided on the multi-stage sub-channel near one end of the shunt passage, and the shunt pressure-stabilizing passage is a passage connecting 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 improved technical solution of the present application, two shunt and pressure-stabilizing passages are provided on the multi-stage sub-flow channel, namely a first shunt and pressure-stabilizing passage and a second shunt and pressure-stabilizing passage;

[0019] The coolant is divided three times and four times in the two diversion and pressure-stabilizing passages respectively. The third diversion section includes the first diversion and pressure-stabilizing passage. The third diversion section achieves three diversions. The three diversions allow the coolant to flow out of the Y-shaped diversion passage, undergo a first-stage water pressure balance in the first diversion and pressure-stabilizing passage, and then be evenly divided again into the multi-stage sub-flow channel.

[0020] The fourth diversion section includes the second diversion and pressure-stabilizing passage, and four diversions are realized through the fourth diversion section. The four diversions enable the coolant to flow out from the first diversion and pressure-stabilizing passage, undergo a second-level water pressure balance in the second diversion and pressure-stabilizing passage, and then be evenly diverted again into the multi-stage sub-channel.

[0021] As a further improved technical solution of the present application, the sum of the widths of all sub-channels of the multi-stage sub-channel is d sum ;

[0022] The distance between the first shunt and stabilizing pressure passage and the slow flow cavity is d1, d sum ≤d1≤2d sum ;

[0023] The distance between the second shunt and pressure-stabilizing passage and the slow-flow cavity is d2.

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

[0025] As a further improved technical solution of the present application, the S-shaped passage includes continuously arranged S-shaped bending segments, the bending radius of the S-shaped bending segments is 1.0 to 2.0 times the width of the sub-channel of the multi-stage sub-channel, and the bending angle is 30° or 150°.

[0026] As a further improved technical solution of the present application, the cross-sectional area of the confluence cavity is 1.1 times the sum of the cross-sectional areas of all sub-channels of the multi-stage sub-channels.

[0027] As a further improved technical solution of the present application, the water inlet and the water outlet are connected by a quick-insert connector or a threaded interface.

[0028] On the other hand, the present application provides a method for producing a liquid cooling server heat dissipation water cooling plate, the method comprising the following steps:

[0029] Step 1: Select appropriate materials according to the requirements of the water-cooling plate, cut the selected materials, and then perform surface treatment on the water-cooling plate materials to obtain two symmetrical original plates;

[0030] Step 2: Mirror-machine water flow channels on two symmetrical original plates, wherein the water flow channels are provided with a slow flow cavity, a diversion channel, a multi-stage sub-flow channel, a confluence cavity, and a trumpet-shaped guide cone;

[0031] The cross section of the slow flow cavity is rectangular, and the coolant passes through the slow flow cavity to reduce the inlet flow velocity, thereby achieving uniform distribution of the coolant pressure;

[0032] The cooling liquid is diverted to the multi-stage sub-flow channels through at least one diversion in the diversion channel;

[0033] The multi-stage sub-flow channel includes at least two sub-flow channels;

[0034] The cross section of the confluence cavity is trapezoidal, and collects the coolant in the multi-stage sub-flow channels;

[0035] The bell-shaped guide cone guides the coolant smoothly from the confluence cavity to the water outlet;

[0036] Then, a closed water flow channel is naturally formed by brazing to obtain the water cooling plate body;

[0037] Step 3: Install a water inlet and a water outlet on one side of the water-cooled plate body, one end of the slow flow chamber is connected to the water inlet, and the other end of the slow flow chamber is connected to the diversion passage, and the diversion passage 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 chamber, the other end of the confluence chamber is connected to one end of the trumpet-shaped guide cone, and the other end of the trumpet-shaped guide cone is connected to the water outlet.

[0038] Compared with the prior art, the present invention has the following advantages:

[0039] The present application provides a liquid-cooled server heat dissipation water-cooling plate with efficient diversion and increased heat exchange area: a diversion channel is set in the water flow channel, and the water flow channel is divided into a first sub-channel, a second sub-channel, a third sub-channel, and a fourth sub-channel through the primary and secondary diversion of the diversion channel, so that the coolant entering the water-cooling plate body can be evenly diverted. This diversion design greatly 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 the heat exchange efficiency, effectively reducing the operating temperature of the electronic equipment, and ensuring its stable and efficient operation.

[0040] The presence of the first and second flow-rate stabilization paths, enabling three-way and four-way flow diversion, ensures that the coolant flows at a stable speed and pressure within each sub-channel. This avoids uneven localized cooling caused by fluctuations in flow velocity and pressure, allowing the cold plate to maintain stable heat dissipation performance over extended periods of operation, extending the lifespan of electronic equipment and reducing the risk of equipment failure due to unstable heat dissipation.

[0041] The S-shaped flow channel creates a turbulent mixing state during the coolant flow, disrupting the coolant's laminar flow and generating intense convection and disturbance within the coolant. This turbulent mixing accelerates heat transfer, allowing the coolant and hot fluids in the coolant to fully mix, further improving heat exchange efficiency. Compared to traditional linear flow channels, this allows the cold plate to achieve more efficient heat dissipation at the same volume and coolant flow rate.

[0042] The multi-stage sub-channels consist of four sub-channels, which work in conjunction with different functional pathways to create a scientifically sound heat dissipation path. After entering the water inlet, the coolant undergoes a series of processes, including diversion, pressure and speed stabilization, and turbulent mixing. After completing sufficient heat exchange within the water-cooling plate, it is discharged from the water outlet. This entire process is smooth and efficient, significantly improving the overall heat dissipation performance of the water-cooling plate, meeting the stringent requirements of modern equipment for efficient heat dissipation, and providing strong support for the miniaturization and high-performance design of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 This is a schematic diagram of the three-dimensional structure of a liquid-cooled server water cooling plate.

[0045] Figure 2 A side view of a liquid-cooled server water cooling plate.

[0046] Figure 3 This is a three-dimensional schematic diagram of the internal structure of a liquid-cooled server water cooling plate.

[0047] Figure 4 This is a partially enlarged structural schematic diagram of one end of the water inlet of a liquid-cooled server cooling water cooling plate.

[0048] Figure 5 This is a partially enlarged structural schematic diagram of one end of the water outlet of a liquid-cooled server water cooling plate.

[0049] Reference numerals:

[0050] 100. Water-cooled plate body; 200. Water flow channel; 210. Slow flow chamber; 220. Diverter channel; 221. T-shaped diverter channel; 222. Y-shaped diverter channel; 230. Multi-stage sub-channel; 231. First sub-channel; 232. Second sub-channel; 233. Third sub-channel; 234. Fourth sub-channel; 240. Converging chamber; 250. Trumpet-shaped guide cone; 260. Diverter and pressure-stabilizing channel; 261. First diverter and pressure-stabilizing channel; 262. Second diverter and pressure-stabilizing channel; 300. Water inlet; 400. Water outlet. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. The following describes an embodiment of this application based on its overall structure.

[0053] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0054] See Figure 1-3 , a liquid-cooled server heat dissipation water cold plate, comprising: a water cold plate body 100, a water flow channel 200 is provided inside the water cold plate body 100, a water inlet 300 and a water outlet 400 are provided on one side of the water cold plate body 100, and a slow flow chamber 210, a diversion channel 220, a multi-stage sub-channel 230, a confluence chamber 240, and a trumpet-shaped guide cone 240 are provided in the water flow channel 200; the slow flow chamber 210 has a rectangular cross section, and the coolant reduces the inlet flow velocity through the slow flow chamber 210 to achieve uniform distribution of the 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 chamber 240 has a trapezoidal cross section, which collects the coolant in the multi-stage sub-channel 230; the trumpet-shaped guide cone 250 smoothly guides the coolant from the confluence chamber 240 to the water outlet 400.

[0055] One end of the slow flow chamber 210 is connected to the water 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 confluence chamber 240, and the other end of the confluence chamber 240 is connected to one end of the trumpet-shaped guide cone 250. The other end of the trumpet-shaped guide cone 250 is connected to the water outlet 400.

[0056] In this embodiment, the water-cooling plate body 100 is made of a metal material with excellent thermal conductivity, such as pure copper, aluminum alloy, or a copper-aluminum composite. It is a flat plate that easily adheres to the surface of a heating device or heat exchanger. The water-cooling plate body 100 comprises an upper plate and a lower plate, brazed together to form a closed water flow channel 200.

[0057] In the diversion passage 220 provided in the water flow channel 200, the coolant first passes through the slow flow chamber 210 to buffer the coolant pressure after entering from the water inlet 300, and then the water flow channel is divided into multiple branches through the primary and secondary diversion of the diversion passage 220. In this embodiment, the coolant passing through the separation passage 220 is divided into at least two branches, so that the coolant entering the water-cooled plate body 100 can be evenly diverted. 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 improving the heat exchange efficiency, effectively reducing the operating temperature of the electronic equipment, and ensuring its stable and efficient operation.

[0058] like Figure 3 and Figure 4 As shown, in order to improve the heat dissipation efficiency of the water-cooled plate, the diversion path includes a T-shaped diversion path 221 and a Y-shaped diversion path 222. The water inlet 300 is connected to the T-shaped diversion path 221 for equal diversion, and 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.

[0059] The coolant is diverted to the multi-stage sub-channel 230 through two diversions in the diversion channel 220. The first diversion section includes a T-shaped diversion channel 221. The first diversion section realizes a first diversion. The first diversion makes the coolant evenly diverted into two parallel branches at the T-shaped diversion channel 221 after flowing out of the slow flow chamber 210. The second diversion section includes a Y-shaped diversion channel 222. The second diversion section realizes a second diversion. The second diversion makes the coolant evenly diverted into four parallel branches again at the Y-shaped diversion channel 222 after flowing out of the T-shaped diversion channel 221. 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.

[0060] In this embodiment, a T-shaped diversion passage 221 and a Y-shaped diversion passage 222 are provided in the diversion passage 220, and multi-sub-channel diversion is realized by the two diversion structure layouts. A first diversion section is provided at the entrance of the water flow channel, and its shape is a T-shaped guide structure, which evenly divides the coolant input from the water inlet 300 into two tributaries; a second diversion section is provided after the first diversion section, and its shape is a Y-shaped guide structure, which finally divides the main channel into a first sub-channel, a second sub-channel, a third sub-channel, and a fourth sub-channel, a total of 4 parallel sub-channels.

[0061] The multi-stage sub-channels consist of four sub-channels, which work in conjunction with different functional pathways to create a scientifically sound heat dissipation path. After entering the water inlet, the coolant undergoes a series of processes, including diversion, pressure and speed stabilization, and turbulent mixing. After completing sufficient heat exchange within the water-cooling plate, it is discharged from the water outlet. This entire process is smooth and efficient, significantly improving the overall heat dissipation performance of the water-cooling plate, meeting the stringent requirements of modern equipment for efficient heat dissipation, and providing strong support for the miniaturization and high-performance design of equipment.

[0062] Specific structure of the diversion section: The diversion angle of the first and second diversion sections is 45°~60°, and the diversion port width is matched according to the sub-channel cross-sectional area. For example, the main channel cross-sectional area is 1.2 times the sum of the sub-channel cross-sectional areas to ensure that the coolant has minimal pressure loss during diversion and uniform flow distribution with an error of ≤5%.

[0063] Channel cross-sectional area design: The first sub-channel 231, the second sub-channel 232, the third sub-channel 233, and the fourth sub-channel 234 are designed with uniform cross-sections, such as rectangular cross-sections with a width of 2 to 5 mm and a depth of 5 to 15 mm, to ensure that the coolant does not significantly accelerate or decelerate during the flow process, maintain a stable Reynolds number of Re = 1000 to 2000, and be in the transition zone between laminar flow and turbulent flow, taking into account both heat dissipation and pressure drop.

[0064] The coolant in the water-cooled plate enters the multi-stage sub-channel 230 after passing through the branch channel 220. The coolant in each sub-channel has uneven speed and pressure, which leads to heat dissipation performance problems. In order to solve this problem, Figure 3 As shown, in this embodiment, at least one shunt pressure-stabilizing passage 260 is provided on one end of the multi-stage sub-channel 230 close to the shunt passage 220. The shunt pressure-stabilizing passage 260 is a passage connecting the first sub-channel 231 with the second sub-channel 232, the second sub-channel 232 with the third sub-channel 233, and the third sub-channel 233 with the fourth sub-channel 234.

[0065] The existence of the shunt and pressure-stabilizing passage 260 can ensure that the coolant flows at a stable speed and pressure in each sub-channel. The width of the shunt and pressure-stabilizing passage 260 is greater than or equal to the width of the sub-channel of the multi-stage sub-channel, avoiding the problem of uneven local heat dissipation caused by fluctuations in water flow speed and pressure, so that the water-cooled plate can always maintain stable heat dissipation performance during long-term operation, thereby extending the service life of electronic equipment and reducing the risk of equipment failure caused by unstable heat dissipation.

[0066] In order to further improve the consistency of the cooling liquid velocity and pressure in each sub-channel, in this embodiment, two shunt and pressure stabilizing passages 260 are provided on the multi-stage sub-channel, such as Figure 3 As shown, they are the first shunt and voltage-stabilizing path 261 and the second shunt and voltage-stabilizing path 262 respectively.

[0067] Dimensional design of the shunt voltage stabilizing passage 260:

[0068] The width of the sub-channel of the multi-stage sub-channel 230 is d; the sum of the widths of all sub-channels of the multi-stage sub-channel 230 is d sum ;

[0069] The distance between the first shunt and stabilizing pressure passage 261 and the slow flow cavity 210 is d1, d sum ≤d1≤2d sum ;

[0070] The distance between the second shunt and pressure-stabilizing passage 262 and the slow-flow cavity 210 is d2. The distance between the second-stage shunt and pressure-stabilizing passage and the first pressure-stabilizing passage and the slow-flow cavity is in increasing relationship. After two pressure divisions, the flow rate and inlet pressure of the fluid leading to the parallel sub-channels will tend to be the same.

[0071] The coolant is divided three times and four times in the two diversion and pressure-stabilizing passages 260. The third diversion section includes the first diversion and pressure-stabilizing passage 261. The third diversion section achieves three diversions. The three diversions allow the coolant to flow out of the Y-shaped diversion passage 222, undergo a first-stage water pressure balance in the first diversion and pressure-stabilizing passage 261, and then be evenly divided again into the multi-stage sub-flow channel 230.

[0072] The fourth diversion section includes a second diversion and pressure-stabilizing passage 262, and four diversions are realized through the fourth diversion section. The four diversions allow the coolant to flow out from the first diversion and pressure-stabilizing passage 261, undergo a second-level water pressure balance in the second diversion and pressure-stabilizing passage 262, and then be evenly diverted again into the multi-stage sub-channel 230.

[0073] In this embodiment, the provision of two shunt and pressure-stabilizing passages 260 further improves the consistency of coolant velocity and pressure in each sub-channel, thereby avoiding the problem of uneven local heat dissipation caused by fluctuations in water flow velocity and pressure, and enabling the water-cooling plate to maintain stable heat dissipation performance during long-term operation, thereby extending the service life of electronic equipment and reducing the risk of equipment failure caused by unstable heat dissipation.

[0074] In this embodiment, the diversion angles of the third and fourth diversion sections are 45° to 60°, and the width of the diversion port is matched according to the cross-sectional area of the sub-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-channels, ensuring that the pressure loss of the coolant is minimized during diversion, the flow distribution is uniform, and the error is ≤5%.

[0075] like Figure 3 As shown, in this embodiment, the multi-stage sub-flow channels are arranged in an S shape, and each sub-flow channel of the multi-stage sub-flow channels is an S-shaped passage.

[0076] In this embodiment, the coolant (such as water-based antifreeze or mineral oil) enters from the water inlet 300, enters the first branch section through the slow flow cavity 210 and is divided into two branches, and then is evenly distributed to the four sub-channels through the second, third and fourth branch sections; the coolant passes through the sub-channels, generates turbulence when flowing through the S-shaped bend section, and fully exchanges heat with the water-cooled plate body; the coolant that has completed the heat exchange is collected in the water outlet confluence cavity, and is circulated and cooled by an external water pump and radiator to achieve continuous heat dissipation.

[0077] The S-shaped flow channel creates a turbulent mixing state during the coolant flow, disrupting the coolant's laminar flow and generating intense convection and disturbance within the coolant. This turbulent mixing accelerates heat transfer, allowing the coolant and hot fluids in the coolant to fully mix, further improving heat exchange efficiency. Compared to traditional linear flow channels, this allows the cold plate to achieve more efficient heat dissipation at the same volume and coolant flow rate.

[0078] Specifically, the S-shaped passage includes continuously arranged S-shaped curved segments, the bending radius of the S-shaped curved segments 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°.

[0079] In this embodiment, the S-shaped curved section causes the coolant to generate centrifugal force during its flow, thereby destroying the boundary layer and forming turbulent mixing (turbulence intensity ≥ 15%), thereby enhancing heat exchange efficiency.

[0080] The thermal resistance of this water-cooled plate is 20% to 30% lower than that of the traditional DC water-cooled plate at the same volume, and the surface temperature uniformity is improved. It is suitable for heat flux density ≥ 100W / cm 2 Heat dissipation scenarios for heat-generating equipment (such as data center servers, new energy vehicle motor controllers, 5G base station amplifier modules, etc.).

[0081] In this embodiment, the water channel is equipped with a diversion path for water flow diversion, a flow rate and pressure stabilization path for stabilizing the flow pressure and speed, and an S-shaped flow path for turbulent mixing of the coolant to fully achieve heat exchange. Through the refined design of the diversion structure, pressure stabilization measures, and flow disturbance path, uniform distribution of the coolant, stable flow, and efficient heat exchange are achieved. The sub-channels allow the coolant to flow through the entire water-cooled plate body at a steady speed and pressure, and then be discharged from the outlet after sufficient heat exchange, thus solving the problems of low heat dissipation efficiency and uneven temperature in traditional water-cooled plates. If the number or shape of the sub-channels needs to be adjusted, the number of diversion sections and the parameters of the S-shaped bend can be optimized according to actual heat dissipation requirements.

[0082] After the coolant flows through 200 and the water channel takes away the heat, the coolant in the multi-stage sub-channel 230 is collected through the confluence cavity 240. Figure 5As shown, the cross section of the cavity is trapezoidal or semicircular, and the cross section area of the confluence cavity 240 is 1.1 times the sum of the cross section areas of all sub-channels of the multi-stage sub-channel 230 .

[0083] In this embodiment, a confluence cavity 240 is provided inside the water outlet 400 to collect the coolant from the four sub-channels and discharge them. The cross-sectional area of the confluence cavity 240 is 1.1 times the sum of the cross-sectional areas of the sub-channels, thereby avoiding backflow or sudden pressure drop at the outlet.

[0084] The water inlet 300 and the water outlet 400 are arranged at the same side of the water cooling plate body 100 and adopt quick-insert connectors or threaded interfaces to facilitate connection with external circulation pipelines.

[0085] Another embodiment provides a method for producing a liquid-cooled server heat dissipation water cooling plate, characterized in that the method comprises the following steps:

[0086] Step 1: Select appropriate materials according to the requirements of the water-cooling plate, cut the selected materials, and then perform surface treatment on the water-cooling plate materials to obtain two symmetrical original plates.

[0087] Step 2: Mirror-process the water flow channel 200 on two symmetrical original plates. 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, and the coolant reduces the inlet flow velocity through the slow flow cavity 210 to achieve uniform distribution of the 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 cross-section of the confluence cavity 240 is trapezoidal, and the coolant in the multi-stage sub-channel 230 is collected; the trumpet-shaped guide cone 250 smoothly guides the coolant from the confluence cavity 240 to the water outlet 400; and then the closed water flow channel 200 is naturally formed by brazing to obtain the water-cooled plate body 100.

[0088] Step 3: A water inlet 300 and a water outlet 400 are provided on one side of the water-cooled plate body 100. One end of the slow flow chamber 210 is connected to the water 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 confluence chamber 240, and the other end of the confluence chamber 240 is connected to one end of the trumpet-shaped guide cone 250. The other end of the trumpet-shaped guide cone 250 is connected to the water outlet 400.

[0089] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

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

2. The liquid cooling server heat dissipation water cooling plate according to claim 1, characterized in that: The diversion passage comprises a T-shaped diversion passage (221) and a Y-shaped diversion passage (222); the water inlet (300) is connected to the T-shaped diversion passage (221) to perform equal diversion; and then the two Y-shaped diversion passages (222) are connected in parallel to the two outlet ends of the T-shaped diversion passage (221) to perform further diversion; 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); The cooling liquid is diverted to the multi-stage sub-channel (230) through two diversions in the diversion channel (220), the first diversion section includes the T-shaped diversion channel (221), and the first diversion section realizes a first diversion, wherein the cooling liquid is evenly diverted into two parallel branches at the T-shaped diversion channel (221) after flowing out of the slow flow cavity (210), the second diversion section includes the Y-shaped diversion channel (222), and the second diversion section realizes a second diversion, wherein the second diversion causes the cooling liquid to be evenly diverted into four parallel branches again at the Y-shaped diversion channel (222) after flowing out of the T-shaped diversion channel (221), and the four parallel branches respectively enter the first sub-channel (231), the second sub-channel (232), the third sub-channel (233), and the fourth sub-channel (234).

3. The liquid cooling server heat dissipation water cooling plate according to claim 2, characterized in that: At least one shunt and pressure-stabilizing passage (260) is provided on one end of the multi-stage sub-flow channel (230) close to the shunt passage (220); the shunt and pressure-stabilizing passage (260) is a passage connecting the first sub-flow channel (231) and the second sub-flow channel (232), the second sub-flow channel (232) and the third sub-flow channel (233), and the third sub-flow channel (233) and the fourth sub-flow channel (234).

4. The liquid cooling server heat dissipation water cooling plate according to claim 3, characterized in that: Two flow-dividing and pressure-stabilizing passages (260) are provided on the multi-stage sub-flow channel (230), namely a first flow-dividing and pressure-stabilizing passage (261) and a second flow-dividing and pressure-stabilizing passage (262); The cooling liquid is respectively divided three times and four times in the two diversion and pressure-stabilizing passages (260); the third diversion section includes the first diversion and pressure-stabilizing passage (261); and the third diversion section is used to achieve the three-fold diversion. The three-fold diversion enables the cooling liquid to flow out of the Y-shaped diversion passage (222), undergo a first-stage water pressure balance in the first diversion and pressure-stabilizing passage (261), and then be evenly divided again to enter the multi-stage sub-flow channel (230); The fourth diversion section includes the second diversion and pressure-stabilizing passage (262), and four diversions are achieved through the fourth diversion section. The four diversions enable the coolant to flow out of the first diversion and pressure-stabilizing passage (261), undergo a second-stage water pressure balance in the second diversion and pressure-stabilizing passage (262), and then be evenly diverted again into the multi-stage sub-flow channel (230).

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

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

7. The liquid cooling server heat dissipation water cooling plate according to claim 6, characterized in that: The S-shaped passage comprises continuously arranged S-shaped curved sections, the curvature radius of the S-shaped curved sections being 1.0 to 2.0 times the width of the sub-channels of the multi-stage sub-channels (230), and the curvature angle being 30° or 150°.

8. The liquid cooling server water cooling plate according to claim 1, characterized in that: The cross-sectional area of the confluence cavity (240) is 1.1 times the sum of the cross-sectional areas of all sub-flow channels of the multi-stage sub-flow channels (230).

9. The liquid cooling server water cooling plate according to claim 1, characterized in that: The water inlet (300) and the water outlet (400) are connected by a quick-insert connector or a threaded interface.

10. A method for producing a liquid cooling server cooling water plate, characterized in that: The steps of this method are as follows: Step 1: Select appropriate materials according to the requirements of the water-cooling plate, cut the selected materials, and then perform surface treatment on the water-cooling plate materials to obtain two symmetrical original plates; Step 2: Mirror-machine a water flow channel (200) on two symmetrical original plates, wherein the water flow channel (200) is provided with a slow flow cavity (210), a diversion channel (220), a multi-stage sub-flow channel (230), a confluence cavity (240), and a trumpet-shaped guide cone (250); The cross section of the slow flow cavity (210) is rectangular, and the coolant passes through the slow flow cavity (210) to reduce the inlet flow velocity, thereby achieving uniform distribution of the coolant pressure; The cooling liquid is diverted to the multi-stage sub-flow channel (230) through at least one diversion in the diversion channel (220); The multi-stage sub-flow channel (230) includes at least two sub-flow channels; The confluence cavity (240) has a trapezoidal cross section and collects the cooling liquid in the multi-stage sub-flow channels (230); The bell-shaped guide cone (250) smoothly guides the cooling liquid from the confluence cavity (240) to the water outlet (400); Then, a closed water flow channel (200) is naturally formed by brazing to obtain a water-cooling plate body (100); Step 3: A water inlet (300) and a water outlet (400) are provided on one side of the water-cooled plate body (100), one end of the slow flow chamber (210) is connected to the water inlet (300), and the other end of the slow flow chamber (210) is connected to the diversion passage (220), and the diversion passage (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 chamber (240), the other end of the confluence chamber (240) is connected to one end of the trumpet-shaped guide cone (250), and the other end of the trumpet-shaped guide cone (250) is connected to the water outlet (400).

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