Multi-phase flow self-adaptive liquid cooling device for server

Abstract

The invention relates to the technical field of liquid cooling, and discloses a multiphase flow self-adaptive liquid cooling device for a server, which comprises a plurality of cold plates, the cold plates are internally provided with flow channels, the flow channels are internally provided with dynamic adjusting assemblies, the dynamic adjusting assemblies comprise a plurality of elbows, the elbows are fixedly connected to the interiors of the flow channels, and the elbows are fixedly connected to the interiors of the flow channels. A corrugated pipe is installed between every two elbows, a fixing ring is fixedly connected to the surface of each corrugated pipe, a rack driving part is fixedly connected to the surface of each fixing ring, when the GPU is in a high-temperature state due to local temperature rise, the bimetallic strip is bent due to expansion difference, the bending drives the driving gear to rotate, and through transmission of the gear driven part, the driving gear drives the bimetallic strip to rotate. The rack driving part drives the fixing ring to move, then the corrugated pipe is stretched, the inner diameter of the corrugated pipe is widened, the local sectional area of a flow channel is increased, in this way, the flow speed of cooling liquid is reduced, more cooling liquid can flow to a high-temperature area, heat is fully absorbed, and the problem that heat absorption of the high-temperature area is insufficient is effectively solved.

Description

Technical Field

[0001] The present invention relates to the field of liquid cooling technology, and in particular to a multiphase flow adaptive liquid cooling device for a server. Background Art

[0002] A liquid cooling device for a server is a device that introduces coolant into a cold plate through an internal flow channel, directly contacts the server's heat-generating components (such as the CPU and GPU), absorbs heat and then removes the heat through a circulation system, thereby achieving efficient heat dissipation and ensuring stable operation of the server.

[0003] In the current server field, with the continuous growth of high-performance computing demand, the workload of GPU in the server is becoming increasingly heavy. The GPU will continue to generate heat during use, which puts extremely high heat dissipation requirements on the liquid cooling device. However, there are many problems that need to be solved in the existing server liquid cooling devices.

[0004] When the GPU is running at high load, there will be significant temperature differences. Since the flow channels in the existing technology are usually fixed flow channels and lack adaptive adjustment capabilities, when the GPU is in a high-intensity working state, local overheating areas will appear. The temperature of these areas may soar to 90 degrees or even higher. In sharp contrast, the temperature of the low-load area will be about 10-30 degrees lower than the hot spot temperature. This uneven temperature distribution phenomenon fully exposes the irrationality of the existing flow channel design. In the high-temperature area, the coolant cannot increase the heat absorption capacity in time according to the change of heat, resulting in heat accumulation, affecting the performance and stability of the GPU; while in the low-temperature area, the flow of the coolant failed to be reasonably distributed, resulting in a waste of flow and reducing the overall efficiency of the liquid cooling system.

[0005] In addition, under high temperature conditions, the coolant will face new challenges. High temperature will cause bubbles in the coolant. These bubbles accumulate in the flow channel, which not only hinders the normal flow of the coolant, but also increases the thermal resistance. The increase in thermal resistance further reduces the heat dissipation effect, forming a vicious circle. From the perspective of heat transfer principles, the presence of bubbles destroys the continuous heat conduction medium properties of the coolant, adds an additional thermal resistance layer in the heat transfer process, and seriously affects the efficiency of heat transfer from the GPU to the coolant.

[0006] Moreover, the existing fixed flow channel design cannot adjust the flow and flow rate of the coolant according to the real-time temperature changes in different areas of the GPU. In some cases, even if the overall coolant flow is sufficient, due to the limitations of the flow channel design, the high-temperature area still cannot be adequately cooled, while the low-temperature area has excessive coolant flowing through, which not only wastes energy, but also fails to effectively solve the heat dissipation problem.

[0007] To this end, the present invention proposes a multiphase flow adaptive liquid cooling device for a server. Summary of the Invention

[0008] The object of the present invention is to provide a multi-phase flow adaptive liquid cooling device for a server to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above object, the present invention provides the following technical solution: A multi-phase flow adaptive liquid cooling device for a server includes a plurality of cold plates. Flow channels are provided inside each cold plate. Dynamic adjustment components are provided inside each flow channel. Each dynamic adjustment component includes a plurality of elbows. The elbows are fixedly connected inside the flow channels. A bellows is installed between every two elbows. A fixing ring is fixedly connected to the surface of each bellows. A rack driving member is fixedly connected to the surface of each fixing ring. A plurality of space grooves matching the number of elbows are provided inside each flow channel. A driving gear is rotatably connected inside each space groove. A bimetallic expansion member is installed on the surface of each driving gear. A gear driven member is installed outside each rack driving member. The flow channels and the space grooves are filled with a heat-conducting fluid, specifically deionized water, and methylbenzotriazole is added to the deionized water for anti-corrosion. The two elbows at the end of the flow channel are connected to an external cooling module. The external cooling module is fixedly connected to the elbows through a pipeline. The external cooling module is used to provide the function of coolant flow.

[0010] Preferably, the elbows are fixedly connected along the bending part of the flow channel. The two elbows at the end of the cold plate are vertically arranged to facilitate connection with the external cooling module. For the bellows between every two elbows, the end far from the fixing ring is fixedly connected to one side elbow, and a convex strip is fixedly connected to the surface of the bellows on the side close to the fixing ring. At the same time, a groove is provided inside the opposite elbow. The bellows is slidably connected inside the corresponding elbow through the convex strip and the groove.

[0011] Preferably, the rack driving member includes: Fixed strips, which are fixedly connected to the outer surface of the fixing ring; Rack one, which is fixedly connected to the outer surface of the fixed strip on the side close to the driving gear; Rack two, which is fixedly connected to the outer surface of the fixed strip on the side far from the driving gear.

[0012] Preferably, the bimetallic expansion member includes: Bimetallic sheet, which is fixedly connected inside the space groove and rotatably connected to the outer surface of the driving gear. The bimetallic sheet is composed of two metals with different coefficients of thermal expansion; Contact column, which is fixedly connected to the bottom of the bimetallic sheet; Fitting groove, which is provided on the surface of the driving gear, and the contact column is slidably connected inside the fitting groove.

[0013] Preferably, the gear follower includes: Two small gears, both of which are rotatably connected inside the space groove and meshed with the driving gear; Half-rotation gear one, which is fixedly connected to the bottom of the small gear closest to the driving gear; Half-rotation gear two, which is fixedly connected to the bottom of the small gear farthest from the driving gear, and the tooth facing directions of the half-rotation gear two and the half-rotation gear one are opposite.

[0014] Preferably, the tooth number ratio of the half-rotation gear one, the rack one, the half-rotation gear two, and the rack two is 1:2.

[0015] Preferably, the bimetallic strip is composed of a nickel-chromium-iron alloy and a nickel-iron alloy. The side close to the rack one is the nickel-chromium-iron alloy, and the other side is the nickel-iron alloy. When the GPU on the circuit board generates heat, the expansion amount of the nickel-chromium-iron alloy is significantly greater than that of the nickel-iron alloy, causing the whole bimetallic strip to bend towards the nickel-iron alloy side, triggering the rotation of the driving gear, and driving the rack actuator to adjust the position of the bellows through the gear follower to achieve adaptive heat dissipation.

[0016] Preferably, a circuit board is installed outside the cold plate, the cold plate is attached to the GPU on the circuit board, and a cabinet is installed outside the circuit board.

[0017] Preferably, a dynamic rack is fixedly connected to the outside of the convex strip, a crushing plate is rotatably connected inside the groove, a dynamic gear meshed with the dynamic rack is fixedly connected to the surface of the crushing plate, and a reset torsion spring is fixedly connected between the dynamic gear and the inner wall of the groove.

[0018] Preferably, both the side of the crushing plate close to the dynamic rack and the opposite side are designed to be streamlined. The whole crushing plate is rectangular, with narrow surfaces on both streamlined sides and wide surfaces on the other two sides.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. When the local temperature of the GPU rises and is in a high-temperature state, the bimetallic strip bends due to the difference in expansion. This bending drives the drive gear to rotate. Through the transmission of the gear follower, the rack actuator drives the fixed ring to move, thereby stretching the bellows, widening its inner diameter, and increasing the local cross-sectional area of the flow channel. As a result, the coolant flow rate decreases, and more coolant can flow to the high-temperature area to fully absorb heat, effectively solving the problem of insufficient heat absorption in the high-temperature area. Conversely, when the local temperature of the GPU is low, the bending degree of the bimetallic strip decreases or returns to its original state, the drive gear rotates in the reverse direction, driving the rack actuator to move in the reverse direction, the bellows is compressed, the inner diameter decreases, the cross-sectional area of the flow channel becomes smaller, the coolant flow rate increases, reducing the flow waste in the low-temperature area, ensuring that the coolant preferentially flows to the high-temperature area, realizing the dynamic adjustment of the coolant flow rate, and greatly improving the overall heat dissipation efficiency.

[0020] 2. When the GPU on the motherboard generates heat and the temperature changes, due to the significant difference in the thermal expansion coefficients of the two metals, the bimetallic strip can quickly respond. For example, when the GPU temperature rises rapidly, the expansion amount of the Inconel alloy is significantly greater than that of the nickel-iron alloy, and the bimetallic strip begins to bend towards the nickel-iron alloy side within a short time, triggering the drive gear to rotate, and then quickly adjusting the position of the bellows. Compared with the traditional heat dissipation adjustment method, the response speed of this bimetallic strip has been greatly improved, and it can make adjustments at the first time when the GPU temperature changes, effectively avoiding the problem of GPU overheating caused by untimely response, and ensuring the performance and stability of the GPU.

[0021] 3. When the GPU is in a local high-temperature state, the ridges on the surface of the bellows drive the dynamic rack to move as the bellows moves. The dynamic rack meshes with the dynamic gear on the surface of the breaker plate, causing the breaker plate to rotate, and the return torsion spring is compressed. At this time, the streamlined side of the breaker plate rotates, and the wide surface matches the coolant flow direction. Its wide surface can break the bubbles in the coolant, avoid the accumulation of bubbles and increase the thermal resistance, and at the same time, slow down the coolant flow rate, allowing the coolant to have more sufficient time to absorb heat in the local high-temperature area, further improving the heat dissipation effect. When the local temperature is low or the GPU is at normal temperature, the streamlined design of the breaker plate can reduce the resistance to the coolant flow, keep the coolant flowing smoothly, avoid unnecessary pressure loss caused by the breaker plate, and improve the uniformity of the overall heat dissipation; 4. Traditional server liquid cooling devices usually have complex structures, are difficult to maintain, and may require additional drive sources to achieve some adjustment functions, increasing energy consumption and the risk of failure. The present invention adopts a modular design. The cold plate is divided into an upper plate and a lower plate by a split manufacturing method, which is convenient for separate manufacturing and installation. On the premise of split manufacturing, the dynamic adjustment component can be installed inside the cold plate when the upper plate and the lower plate are installed with each other, and the cold plate can be welded into a whole by laser welding means. This design makes the assembly and maintenance of the device more convenient. At the same time, the internal structure of the device uses a mechanical structure to achieve adaptive adjustment without additional electrical components as drive sources, reducing energy consumption and failure points. For example, by using the thermal expansion characteristics of bimetallic sheets, the transmission of gear racks, and the expansion and contraction of bellows and other pure mechanical methods, functions such as automatically adjusting the coolant flow rate according to the GPU temperature change and eliminating bubbles are realized, improving the reliability and stability of the device and reducing the maintenance cost and energy cost. Description of the Drawings

[0022] Figure 1 Front view three-dimensional schematic diagram of the main structure of the present invention; Figure 2 Cross-sectional three-dimensional schematic diagram of the cold plate of the present invention; Figure 3 For the present invention Figure 2 Enlarged three-dimensional schematic diagram of the structure at A in the present invention; Figure 4 Cross-sectional three-dimensional schematic diagram of the cold plate and the flow channel of the present invention; Figure 5 Elbow and bellows three-dimensional schematic diagram of the present invention; Figure 6 Elbow, bellows, fixed ring, rack driving member, driving gear, and bimetallic expansion member three-dimensional schematic diagram of the present invention; Figure 7 For the present invention Figure 6 Enlarged three-dimensional schematic diagram of the structure at B in the present invention; Figure 8 Three-dimensional disassembly schematic diagram of the dynamic adjustment component of the present invention; Figure 9 For the present invention Figure 8 Enlarged three-dimensional schematic diagram of the structure at C in the present invention; Figure 10 Partial cross-sectional three-dimensional schematic diagram of the dynamic adjustment component of the present invention; Figure 11 For the present invention Figure 10 Enlarged three-dimensional schematic diagram of the structure at D in the present invention; Figure 12 Another angle partial cross-sectional three-dimensional schematic diagram of the dynamic adjustment component of the present invention.

[0023] In the figure: 11. Cold plate; 12. Runner; 13. Main board; 14. Cabinet.

[0024] 2. Dynamic adjustment component; 21. Elbow; 22. Bellows; 23. Fixed ring; 24. Rack driving part; 241. Fixed bar; 242. First rack; 243. Second rack; 25. Driving gear; 26. Bimetallic expansion part; 261. Bimetallic strip; 262. Contact column; 263. Matching groove; 27. Gear driven part; 271. Small gear; 272. First half - stroke gear; 273. Second half - stroke gear; 28. Dynamic rack; 29. Crushing plate; 210. Dynamic gear; 211. Reset torsion spring. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0026] It should be noted that the bimetallic strip 261 only provides the function of bending itself through thermal expansion differences at high temperatures, and its working principle and specific structure are both prior arts. Therefore, due to the generality of the above - mentioned structure, its specific principle will not be elaborated hereinafter.

[0027] Please refer to Figures 1 to 12 , the present invention provides an embodiment: a multiphase flow adaptive liquid cooling device for a server, including a plurality of cold plates 11. Flow channels 12 are opened inside each cold plate 11, and dynamic adjustment components 2 are arranged inside each flow channel 12. Each dynamic adjustment component 2 includes a plurality of elbows 21. The elbows 21 are fixedly connected inside the flow channels 12. A bellows 22 is installed between every two elbows 21. A fixed ring 23 is fixedly connected to the surface of each bellows 22. A rack driving part 24 is fixedly connected to the surface of each fixed ring 23. A plurality of space grooves matching the number of elbows 21 are opened inside the flow channels 12. A driving gear 25 is rotatably connected inside each space groove. A bimetallic expansion part 26 is installed on the surface of each driving gear 25. A gear driven part 27 is installed outside each rack driving part 24. The flow channels 12 and the space grooves are filled with a heat - conducting fluid, specifically deionized water, and methylbenzotriazole is added to the deionized water for anti - corrosion. The two elbows 21 at the end of the flow channel 12 are connected to an external cooling module. The external cooling module is fixedly communicated with the elbows 21 through pipes. The external cooling module is used to provide the function of coolant flow.

[0028] Please refer to as Figures 5 to 7As shown, the elbows 21 are fixedly connected along the bends of the flow channel 12. The two elbows 21 at the end of the cold plate 11 are vertically arranged to facilitate connection with an external cooling module. The corrugated pipes 22 between every two elbows 21 have one end fixedly connected to an elbow 21 on one side away from the fixing ring 23, and the surface of the corrugated pipe 22 on the side close to the fixing ring 23 is fixedly connected with a rib. At the same time, grooves are formed inside the opposite elbows 21, and the corrugated pipe 22 is slidably connected inside the corresponding elbow 21 through the rib and the groove.

[0029] It should be noted that the rack driving member 24 includes: a fixing bar 241, and the fixing bars 241 are fixedly connected to the outer surface of the fixing ring 23; a first rack 242, and the first rack 242 is fixedly connected to the outer surface of the fixing bar 241 on the side close to the driving gear 25; a second rack 243, and the second rack 243 is fixedly connected to the outer surface of the fixing bar 241 on the side away from the driving gear 25. The bimetallic expansion member 26 includes: a bimetallic sheet 261, and the bimetallic sheet 261 is fixedly connected inside the space groove and rotatably connected to the outer surface of the driving gear 25. The bimetallic sheet 261 is composed of two metals with different coefficients of thermal expansion; a contact post 262, and the contact post 262 is fixedly connected to the bottom of the bimetallic sheet 261; a mating groove 263, and the mating groove 263 is formed on the surface of the driving gear 25, and the contact post 262 is slidably connected inside the mating groove 263. The gear driven member 27 includes: two small gears 271, and the two small gears 271 are both rotatably connected inside the space groove and meshed with the driving gear 25; a half - stroke gear one 272, and the half - stroke gear one 272 is fixedly connected to the bottom of the small gear 271 closest to the driving gear 25; a half - stroke gear two 273, and the half - stroke gear two 273 is fixedly connected to the bottom of the small gear 271 farthest from the driving gear 25. The tooth - facing directions of the half - stroke gear two 273 and the half - stroke gear one 272 are opposite. Motherboards 13 are installed outside the cold plate 11. The cold plate 11 is attached to the GPU on the motherboard 13, and cabinets 14 are installed outside the motherboard 13.

[0030] Please refer to as Figures 10 to 12 As shown, dynamic racks 28 are fixedly connected to the outside of the ribs, and crushing plates 29 are rotatably connected inside the grooves. Dynamic gears 210 meshing with the dynamic racks 28 are fixedly connected to the surfaces of the crushing plates 29. Reset torsion springs 211 are fixedly connected between the dynamic gears 210 and the inner walls of the grooves. The sides of the crushing plates 29 close to and opposite to the dynamic racks 28 are designed to be streamlined. The crushing plate 29 is rectangular as a whole, with narrow surfaces on its two streamlined sides and wide surfaces on the other two sides. The corrugated pipe 22 is made of fluororubber, and the crushing plate 29 is made of 316L stainless steel.

[0031] It should be noted that the tooth number ratio of the half - stroke gear one 272, the first rack 242 and the half - stroke gear two 273, the second rack 243 is 1:2.

[0032] It should be noted that the bimetallic strip 261 is composed of nickel-chromium-iron alloy and nickel-iron alloy, wherein the side close to the rack 242 is nickel-chromium-iron alloy, and the other side is nickel-iron alloy. When the GPU on the motherboard 13 heats up and causes the local temperature to rise, the expansion of the nickel-chromium-iron alloy is significantly higher than that of the nickel-iron alloy, forcing the bimetallic strip 261 to bend as a whole toward the nickel-iron alloy side.

[0033] This bending deformation drives the driving gear 25 to rotate through the resistance column 262 at the bottom, and then drives the fixed ring 23 to drive the bellows 22 to alternately compress / stretch through the two-stage transmission of the gear follower 27 (half-length gear 1 272 and rack 1 242, half-length gear 2 273 and rack 2 243).

[0034] It should be noted that the cold plate 11 can be divided into an upper plate and a lower plate by a split manufacturing method, so that they can be manufactured separately. Therefore, under the premise of split manufacturing, the dynamic adjustment component 2 can be installed inside the cold plate 11 when the upper plate and the lower plate are installed to each other, and the cold plate 11 can be welded into a whole by laser welding.

[0035] Specifically, the external cooling module is fixedly connected to the elbow 21 at the end of the flow channel 12 through a pipeline to provide power for the circulation of the coolant. The coolant flows in from the elbow 21 at one end, flows in several bellows 22, and then flows out from the elbow 21 at the other end, and circulates through different cold plates 11 in this way. The deionized water filled in the flow channel 12 and the space groove plays a key role. Its good thermal conductivity effectively reduces the thermal resistance between the elbow 21, the bellows 22 and the flow channel 12, ensuring that heat can be efficiently transferred to the coolant.

[0036] When the GPU on the motherboard 13 generates heat and the local temperature rises, the bimetallic strip 261 begins to play a regulating role. Since the bimetallic strip 261 is composed of nickel-chromium-iron alloy and nickel-iron alloy, and the side close to the rack 242 is nickel-chromium-iron alloy and the other side is nickel-iron alloy, in a high temperature environment, the expansion of the nickel-chromium-iron alloy is significantly greater than that of the nickel-iron alloy, causing the bimetallic strip 261 to bend toward the nickel-iron alloy side as a whole.

[0037] The bending of the bimetallic strip 261 drives the resistance column 262 at the bottom to move synchronously. The resistance column 262 resists the matching groove 263 on the surface of the driving gear 25, forcing the driving gear 25 to rotate. The rotation of the driving gear 25 drives the small gear 271 meshing with it to rotate, and the half-length gear 1 272 located at the bottom rotates accordingly. The half-length gear 1 272 meshes with the rack 1 242, driving the rack 1 242 to move to the side away from the driving gear 25. The rack 1 242 is connected to the bellows 22 through the fixing bar 241 and the fixing ring 23, thereby driving the bellows 22 to move, causing it to be compressed and the inner diameter to decrease.

[0038] Due to the drastic change in GPU temperature, the bimetallic strip 261 continuously bends, driving the gear 25 to rotate continuously. As the pinion 271 rotates, the half-rack gear one 272 no longer meshes with the rack one 242, and the half-rack gear two 273 starts to mesh with the rack two 243. The tooth number ratio of the half-rack gear one 272, the rack one 242, the half-rack gear two 273, and the rack two 243 is 1:2. This means that when the half-rack gear two 273 rotates, the moving distance of the rack two 243 is twice that of the rack one 242 driven by the half-rack gear one 272. The rack two 243 drives the bellows 22 to move toward the side close to the driving gear 25 through the fixed bar 241 and the fixed ring 23, and the bellows 22 is stretched, and the inner diameter becomes wider.

[0039] After the inner diameter of the bellows 22 becomes wider, the local cross-sectional area of the flow channel 12 increases, the flow rate of the coolant decreases, and the flow distribution becomes more uniform. For the overheated area, the decrease in flow rate helps the coolant to fully absorb heat and further improves the heat dissipation effect; at the same time, the increased flow rate can also meet the demand for coolant in the high-temperature area and achieve precise heat dissipation.

[0040] It should be noted that when there is a situation where the local temperature of the GPU is too low, based on the above, when the half-rack gear one 272 meshes with the rack one 242 and the bellows 22 is compressed, the temperature at this time is no longer able to make the bimetallic strip 261 continue to bend. Therefore, the bellows 22 is still in a compressed state at this time. After the bellows 22 is compressed, the inner diameter decreases, and its local cross-sectional area becomes smaller. According to the principle of fluid continuity, when the flow rate is constant, the decrease in cross-sectional area will increase the flow rate of the coolant, thereby reducing the flow waste in the low-temperature area and ensuring that the coolant preferentially flows to the high-temperature area, realizing the dynamic adjustment of the coolant flow rate and improving the overall heat dissipation efficiency.

[0041] In addition, when the local temperature of the GPU is high, the convex strips on the surface of the bellows 22 move toward the side close to the driving gear 25 as the bellows 22 moves. The convex strips drive the dynamic rack 28 to move, and the dynamic rack 28 meshes with the dynamic gear 210 on the surface of the crushing plate 29, causing the crushing plate 29 to rotate, and the reset torsion spring 211 is compressed. At this time, the streamlined side of the crushing plate 29 rotates, and the wide surface matches the coolant flow direction, occupying a certain space and reducing the relative space. The wide surface of the crushing plate 29 can break the bubbles in the coolant to avoid the accumulation of bubbles and increase the thermal resistance; at the same time, it slows down the flow rate of the coolant, allowing the coolant to have more sufficient time to absorb heat in the local high-temperature area and further improving the heat dissipation effect.

[0042] When the local temperature is low or the GPU is at normal temperature, the streamlined design of the crushing plate 29 can reduce the obstruction to the flow of the coolant, keep the coolant flowing smoothly, avoid unnecessary pressure loss caused by the crushing plate 29, ensure the efficient and stable operation of the entire liquid cooling system. Moreover, its streamlined design can also guide the uniform distribution of the coolant, prevent the occurrence of flow dead zones, enable the coolant to better cover all areas of the GPU, and improve the uniformity of overall heat dissipation.

[0043] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0044] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-phase flow adaptive liquid cooling device for a server, comprising a plurality of cold plates (11), and flow channels (12) are respectively formed inside the cold plates (11), and it is characterized in that: The flow channel (12) is provided with a dynamic adjustment component (2) inside. The dynamic adjustment component (2) includes a plurality of elbows (21). The elbows (21) are fixedly connected to the flow channel (12). A bellows (22) is installed between every two of the elbows (21). A fixing ring (23) is fixedly connected to the surface of the bellows (22). A rack driving component (24) is fixedly connected to the surface of the fixing ring (23). A plurality of space slots matching the number of the elbows (21) are provided inside the flow channel (12). A driving gear (25) is rotatably connected inside the space slots. A bimetal expansion piece (26) is installed on the surface of the driving gear (25). A gear follower (27) is installed outside the rack driving component (24). The flow channel (12) and the space slots are filled with a heat transfer fluid. The two elbows (21) located at the ends of the flow channel (12) are connected to an external cooling module.

2. The multi-phase flow adaptive liquid cooling device for a server according to claim 1, wherein: The elbows (21) are fixedly connected in accordance with the bends of the flow channel (12). The two elbows (21) located at the ends of the cold plate (11) are vertically arranged to facilitate connection with an external cooling module. The end of the bellows (22) between each two elbows (21) away from the fixing ring (23) is fixedly connected to the elbow (21) on one side, and the surface of the bellows (22) close to the fixing ring (23) is fixedly connected with a convex strip, and a groove is provided inside the opposite elbow (21). The bellows (22) is slidably connected to the inside of the corresponding elbow (21) through the convex strip and the groove.

3. The multi-phase flow adaptive liquid cooling device for a server according to claim 1, wherein: The rack active member (24) comprises: Fixing strips (241), each of the fixing strips (241) being fixedly connected to an outer surface of the fixing ring (23); Rack one (242), the rack one (242) being fixedly connected to the outer surface of the fixing bar (241) on a side close to the driving gear (25); Rack 2 (243), wherein the rack 2 (243) is fixedly connected to the outer surface of the fixing bar (241) on a side away from the driving gear (25).

4. A multi-phase flow adaptive liquid cooling device for a server according to claim 1, characterized in that: The bimetal expansion member (26) comprises: a bimetallic strip (261), the bimetallic strip (261) being fixedly connected to the interior of the spatial groove and rotatably connected to the outer surface of the driving gear (25), the bimetallic strip (261) being composed of two metals having different thermal expansion coefficients; A resistance column (262), wherein the resistance column (262) is fixedly connected to the bottom of the bimetallic strip (261); A matching groove (263) is provided on the surface of the driving gear (25), and the abutment column (262) is slidably connected to the inside of the matching groove (263).

5. The multi-phase flow adaptive liquid cooling device for a server according to claim 1, characterized in that: The gear follower (27) comprises: Two small gears (271), both of which are rotatably connected to the interior of the spatial groove and mesh with the driving gear (25); A half-distance gear 1 (272), wherein the half-distance gear 1 (272) is fixedly connected to the bottom of the small gear (271) closest to the driving gear (25); Half-way gear two (273), the half-way gear two (273) is fixedly connected to the bottom of the pinion gear (271) farthest from the driving gear (25), and the tooth facing directions of the half-way gear two (273) and the half-way gear one (272) are opposite.

6. The multi-phase flow adaptive liquid cooling device for a server according to claim 5, wherein: The tooth number ratio of the half-way gear one (272), the rack one (242) and the half-way gear two (273), the rack two (243) is 1:

2.

7. A multiphase flow adaptive liquid cooling device for a server according to claim 4, characterized in that: The bimetallic strip (261) is composed of nickel-chromium-iron alloy and nickel-iron alloy. The side of the bimetallic strip (261) close to the rack one (242) is nickel-chromium-iron alloy, and the other side is nickel-iron alloy.

8. A multi-phase flow adaptive liquid cooling device for a server according to claim 1, characterized in that: A main board (13) is installed outside the cold plate (11), and a cabinet (14) is installed outside the main board (13).

9. The multi-phase flow adaptive liquid cooling device for a server according to claim 2, wherein: A dynamic rack (28) is fixedly connected to the outside of the convex strip, a crushing plate (29) is rotatably connected to the inside of the groove, a dynamic gear (210) meshing with the dynamic rack (28) is fixedly connected to the surface of the crushing plate (29), and a return torsion spring (211) is fixedly connected between the dynamic gear (210) and the inner wall of the groove.

10. A multiphase flow adaptive liquid cooling device for a server according to claim 9, characterized in that: The side of the crushing plate (29) close to the dynamic rack (28) and the opposite side are both designed to be streamlined.

Images