Liquid cooling radiator

Abstract

The utility model belongs to the technical field of electronic component heat dissipation equipment, and provides a liquid cooling radiator which comprises a container, a liquid inlet pipeline and a liquid outlet pipeline, a partition plate is arranged in the container and divides the container into a liquid inlet chamber and a liquid outlet chamber in the thickness direction of the container, and the periphery of the partition plate and the inner side wall of the container are arranged at intervals to form a channel; a mounting part used for being mounted on a heating element is arranged on the end surface, close to the liquid inlet chamber, of the container; the liquid inlet pipeline and the liquid outlet pipeline are arranged on the end face, away from the mounting part, of the container, and the liquid inlet pipeline extends into the container and communicates with the center part of the liquid inlet chamber; the liquid outlet pipeline is communicated with the liquid outlet chamber; a flow dividing protrusion located in the center of the liquid inlet chamber is arranged in the liquid inlet chamber, a flow dividing face is arranged on the periphery of the flow dividing protrusion, and the flow dividing protrusion is used for facing inlet liquid and dividing the liquid towards the periphery in a radial mode. The liquid cooling radiator solves the problem that an existing liquid cooling radiator is uneven in heat dissipation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electronic component heat dissipation equipment, and particularly relates to a liquid cooling heat sink for electronic components. BACKGROUND

[0002] The liquid cooling heat sink is a device for circulating heat dissipation by using liquid, which has the advantages of silence and fast heat dissipation. The liquid cooling heat sink generally has a pump body integrated or externally connected, so that the liquid in the internal flow channel can circulate and flow, thereby absorbing and taking away heat to achieve the purpose of heat dissipation.

[0003] The liquid cooling heat sink of the prior art generally has a serpentine flow channel arranged in the interior of the heat sink, and a mounting portion arranged at the bottom of the heat sink for being attached to an electronic component such as a chip. The serpentine flow channel covers the entire interior of the heat sink, and the two ends of the serpentine flow channel are respectively connected to an inlet pipe and an outlet pipe on the heat sink.

[0004] In actual application, the heat of the electronic component is transmitted from the mounting portion to the main body of the heat sink, which is equivalent to that the heat source is located in the coverage range of the serpentine flow channel. However, the flow path of the liquid is from the inlet pipe into the heat sink, through the serpentine flow channel, and then out of the outlet pipe. This means that the liquid enters the heat source from one side and flows out from the other side of the heat source. In this process, the temperature of the liquid gradually rises with the interaction with the heat, resulting in that the heat dissipation effect of the part of the heat sink far from the inlet pipe is low, thereby causing the uneven heat dissipation condition.

[0005] It can be seen that the liquid cooling heat sink of the prior art has the defect of uneven heat dissipation due to the internal serpentine flow channel design, which is a technical problem that the heat dissipation equipment manufacturers urgently need to solve. SUMMARY

[0006] The purpose of the embodiment of the application is to provide a liquid cooling heat sink to solve the technical problem of uneven heat dissipation of the liquid cooling heat sink of the prior art.

[0007] To achieve the above purpose, the technical solution adopted by the application is to provide a liquid cooling heat sink, which comprises a container and an inlet pipe and an outlet pipe arranged on the container, an internal portion of the container is provided with a partition plate, the partition plate separates the internal portion of the container into an inlet chamber and an outlet chamber along the thickness direction of the container, and a channel is formed between the outer periphery of the partition plate and the inner side wall of the container; a mounting portion for being mounted on a heat generating component is arranged on the end face of the container close to the inlet chamber;

[0008] The inlet pipe and the outlet pipe are arranged on the end face of the container away from the mounting portion, the inlet pipe extends into the container and is communicated with the center portion of the inlet chamber, and the outlet pipe is communicated with the outlet chamber.

[0009] The liquid inlet chamber is provided with a flow splitting protrusion in the center of the liquid inlet chamber, and the outer periphery of the flow splitting protrusion has a flow splitting surface, and the flow splitting protrusion is used to meet the incoming liquid and radially split the liquid to the outer periphery.

[0010] The liquid cooling radiator provided by the application has the beneficial effects that compared with the prior art, the internal part of the liquid cooling radiator is divided into a liquid inlet chamber and a liquid outlet chamber by a partition plate, the liquid inlet pipeline on the radiator is connected to the center of the radiator and enters the internal part of the radiator, the liquid is split from the center of the liquid inlet chamber to the outer periphery, passes through the communication passage and enters the liquid outlet chamber, and finally flows out from the liquid outlet pipeline. In this way, the effective travel of the liquid in the internal part of the radiator is shortened in cooperation with the fact that the heat source of the electronic component gradually decreases from the center to the outer periphery. When the temperature of the liquid is the lowest, the heat source with the highest temperature is directly heat-absorbed, and then gradually radially diffused to the outer periphery, so that the heat of the outer periphery of the heat source core is synchronously taken away, the heat exchange efficiency and the temperature uniformity are effectively improved, and the heat dissipation effect is improved.

[0011] In order to solve the problem that the liquid entering the internal part of the radiator is directly impacted with the bottom surface of the liquid inlet chamber and is throttled in an undirectional manner, causing the flow of the liquid to the outer periphery to be uneven, the liquid cooling radiator of the application is further provided with a flow splitting protrusion, the flow splitting protrusion is located in the center of the liquid inlet chamber, the flow splitting protrusion is used to meet the incoming liquid, and the flow splitting surface on the outer periphery of the flow splitting protrusion is used to radially and uniformly diffuse the liquid to the outer periphery, so that the flow of the liquid diffused from the center of the liquid inlet chamber to the outer periphery is uniform, and the uniformity of the flow of the liquid is effectively improved.

[0012] In one embodiment, the liquid inlet pipe is vertically connected to the center of the liquid inlet chamber, and the inner diameter of the pipe section of the liquid inlet pipeline in the internal part of the container is gradually reduced at the radial pipeline opening to form a throttling structure. In this way, the funnel-shaped throttling structure is beneficial to form a jet flow of the liquid, so as to increase the liquid pressure of the liquid entering the center area of the liquid inlet chamber, promote the liquid to flow to the periphery, and avoid the flow instability caused by the gas backflow of the phase change of the liquid in the center area of the liquid inlet chamber.

[0013] The structure of the flow splitting protrusion is improved, the flow splitting protrusion is a conical protrusion, and the flow splitting surface on the outer periphery of the flow splitting protrusion is a concave arc surface. In this way, the conical flow splitting protrusion forms a sharp end at the top end, which is beneficial to avoid blocking the incoming liquid, so that the liquid quickly passes through the sharp end of the flow splitting protrusion and diffuses to the outer periphery along the concave arc flow splitting surface on the outer periphery of the flow splitting protrusion, which is beneficial to improve the smoothness of the liquid flow and effectively reduce the hydraulic pressure loss.

[0014] The structure on the partition plate is improved, and the end face of the liquid outlet chamber is a groove face which is inclined from the outer periphery to the middle part; the deepest part of the groove face corresponds to the position of the pipe opening of the liquid outlet pipe. In this way, the liquid flow rate in the liquid outlet chamber is accelerated, and the liquid is quickly gathered on the pipe opening of the liquid outlet pipe to be discharged, thereby improving the heat dissipation effect.

[0015] The structure in the liquid inlet chamber is improved, and a plurality of flow guide fins are arranged around the outer periphery of the flow distribution protrusion in the ring shape, and the plurality of flow guide fins are arranged in the radial distribution from the center to the outer periphery of the liquid inlet chamber. In this way, the flow guide fins are arranged in the liquid inlet chamber, on the one hand, the liquid is further diffused by the flow guide fins for secondary flow distribution. On the other hand, it is beneficial to reduce the flow rate of the liquid, increase the interaction time of the liquid and heat, improve the heat absorption saturation of the liquid, and effectively improve the heat dissipation effect.

[0016] In one embodiment, each of the flow guide fins has a proximal end close to the center of the liquid inlet chamber and a distal end away from the center of the liquid inlet chamber, and the width of the flow guide fin gradually decreases from the proximal end to the distal end, so that the flow guide fin is configured as a water drop-shaped bump on the bottom surface of the liquid inlet chamber. In this way, the liquid is further diffused by the water drop-shaped flow guide fin, so that the temperature of the liquid is more uniform, and the heat dissipation effect is improved.

[0017] In one embodiment, the top of each of the flow guide fins is connected with the partition plate, and the proximal end and the distal end of each of the flow guide fins are both arc surfaces. The liquid can smoothly transition on the flow guide fin, effectively improving the flow smoothness of the liquid on the flow guide fin, and being beneficial to reduce the hydraulic loss.

[0018] In one embodiment, the connection between the flow guide fin and the inner bottom surface of the liquid inlet chamber is an arc transition. It is beneficial to increase the heat exchange area and the heat conduction capacity, absorb more heat, and thereby improve the heat absorption effect of the liquid.

[0019] In one embodiment, the flow guide fins arranged in the ring shape around the flow distribution protrusion in the liquid inlet chamber constitute a plurality of ring-shaped arrays arranged in layers, and the flow guide fins in adjacent ring-shaped arrays are arranged staggered. In this way, the liquid in the area between the flow guide fins in adjacent ring-shaped arrays can form a vortex, thereby increasing the residence time of the liquid, being beneficial to fully absorb heat, and improving the heat exchange capacity of the liquid.

[0020] In one embodiment, the flow guide fins in two adjacent ring-shaped arrays are aligned with each other, and the spacing between the flow guide fins aligned with each other gradually increases. In this way, the distribution density of the flow guide fins gradually decreases from the center area to the outer periphery of the liquid inlet chamber, which is beneficial to reduce the hydraulic loss of the liquid flowing in the liquid inlet chamber. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0022] Figure 1 Schematic diagram of the three-dimensional structure of the liquid cooling radiator provided in the embodiments of the present application Figure 1 ;

[0023] Figure 2 Schematic diagram of the three-dimensional structure of the liquid cooling radiator provided in the embodiments of the present application Figure 2 ;

[0024] Figure 3 Schematic diagram of the internal structure of the liquid cooling radiator provided in the embodiments of the present application Figure 1 ;

[0025] Figure 4 Schematic diagram of the internal structure of the liquid cooling radiator provided in the embodiments of the present application Figure 2 ;

[0026] Figure 5 Partial enlarged view of the communication between the liquid inlet pipeline and the liquid inlet chamber provided in the embodiments of the present application

[0027] Figure 6 Schematic diagram of the internal structure of the liquid cooling radiator provided in the embodiments of the present application Figure 3 ;

[0028] Figure 7 Schematic diagram of the internal structure of the liquid cooling radiator provided in the embodiments of the present application Figure 4 ;

[0029] Figure 8 Schematic diagram of the structure of the liquid inlet chamber provided in the embodiments of the present application, in which flow guide vanes are laid

[0030] Figure 9 Schematic diagram of the three-dimensional structure of the flow guide vane provided in the embodiments of the present application

[0031] Figure 10 Layout top view of the flow guide vane in the liquid inlet chamber provided in the embodiments of the present application

[0032] Figure 11 Partial enlarged view of the flow guide vane layout provided in the embodiments of the present application

[0033] Figure 12 Liquid flow simulation view of the flow guide vane layout provided in the embodiments of the present application

[0034] Figure 13A plan view of the guide vane provided by the embodiment of the present application;

[0035] Figure 14 A structure schematic view of two adjacent guide vanes provided by the embodiment of the present application.

[0036] In the drawings, various reference signs indicate the following:

[0037] 1 - container; 11 - partition plate; 111 - recess surface; 112 - guide surface; 12 - passage; 13 - mounting portion;

[0038] 2 - liquid inlet pipeline; 21 - throttling structure; 22 - inclined surface;

[0039] 3 - liquid outlet pipeline;

[0040] 4 - liquid inlet chamber;

[0041] 5 - liquid outlet chamber;

[0042] 6 - shunt protrusion; 61 - shunt surface;

[0043] 7 - guide vane; 70 - annular array; 71 - proximal end; 72 - distal end. DETAILED DESCRIPTION

[0044] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0045] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0046] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0047] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0048] The conventional liquid cooling radiator generally has a serpentine flow channel arranged inside the radiator, and a mounting portion arranged at the bottom of the radiator and attached to an electronic component such as a chip. The serpentine flow channel covers the entire inside of the radiator, and the two ends of the serpentine flow channel are respectively connected to the liquid inlet pipe and the liquid outlet pipe on the radiator.

[0049] In actual application, the heat of the electronic component is transferred from the mounting portion to the inside of the radiator, and the highest temperature part of the heat source is located at the center of the coverage range of the serpentine flow channel. However, the flow path of the liquid is from the liquid inlet pipe into the inside of the radiator, through the entire serpentine flow channel, and then out from the liquid outlet pipe. This means that the liquid enters from one side of the heat source and flows out from the other side of the heat source. In this process, the temperature of the liquid gradually rises with the interaction with the heat, resulting in a decrease in the heat dissipation effect of the part of the radiator away from the liquid inlet pipe, and easy to cause uneven heat dissipation. The liquid cooling radiators designed with the serpentine flow channel all have the above-mentioned uneven heat dissipation defect.

[0050] In order to solve the problem of uneven heat dissipation of the above-mentioned liquid cooling radiator, the related art has a scheme of connecting the liquid inlet pipe from the middle part of the radiator to the inside of the radiator. After the liquid is input from the middle part of the radiator to the inside of the radiator, the liquid will directly impact the inner bottom surface of the radiator, resulting in an undirectional throttling. It can be seen that the design adopted by the related art has the problem of uneven diffusion of the liquid from the middle part to the outer periphery, and still has the problem of uneven heat dissipation of the radiator.

[0051] Therefore, the embodiments of the present application provide a micro-channel liquid cooling radiator for electronic components, which changes the conventional serpentine pipe design, so that the liquid can enter the inside flow channel from the middle part of the radiator, which is beneficial to shorten the process and improve the heat dissipation effect by dissipating heat to the center of the heat source. In addition, the improvement is made for the undirectional throttling condition that occurs when the liquid enters the inside of the radiator from the middle part, so that the liquid entering the inside of the radiator from the middle part can diffuse uniformly to the outer periphery, effectively solving the problem of uneven heat dissipation of the conventional liquid cooling radiator. The present application will be described in detail.

[0052] Please refer to Figure 1 , Figure 2 and Figure 3 , the liquid cooling radiator comprises a container 1 and a liquid inlet pipe 2 and a liquid outlet pipe 3 arranged on the container 1.

[0053] As Figure 3 shown, the inside of the container 1 is provided with a partition plate 11, which separates the inside of the container 1 into a liquid inlet chamber 4 and a liquid outlet chamber 5 along the thickness direction of the container 1, and the outer periphery of the partition plate 11 is spaced apart from the inner side wall of the container 1 to form a passage 12 for connecting the liquid inlet chamber 4 and the liquid outlet chamber 5.

[0054] An installation portion 13 for installing a heating element is provided on the end face of the container 1 close to the liquid inlet chamber 4, which means that heat is directly transferred from the installation portion 13 to the liquid inlet chamber 4, which is the main heat dissipation area.

[0055] The liquid inlet pipe 2 and the liquid outlet pipe 3 are both provided on the end face of the container 1 away from the installation portion 13, the liquid inlet pipe 2 extends into the container 1 and is connected to the center of the liquid inlet chamber 4. The liquid outlet pipe 3 is directly connected to the liquid outlet chamber 5.

[0056] As an example, as Figure 3 shown, in the liquid cooling radiator of the embodiment of the present application, the liquid outlet chamber 5 is arranged above the liquid inlet chamber 4 in the inside of the container 1. The installation portion 13 on the lower end face of the container 1 is in close contact with the bottom surface of the liquid inlet chamber 4, and the center of the installation portion 13 is coaxially aligned with the center of the liquid inlet chamber 4. The liquid inlet pipe 2 and the liquid outlet pipe 3 are both provided on the upper end face of the container 1, and the liquid outlet pipe 3 is directly connected to the liquid outlet chamber 5 on the upper part. After the liquid inlet pipe 2 extends into the inside of the container 1, it passes through the liquid outlet chamber 5 and is connected to the liquid inlet chamber 4.

[0057] The liquid flow path in the liquid cooling radiator of the present application is as Figure 4 shown, the liquid can preferably be a cooling liquid, and an external pump body (not shown) can be preferably used to drive the liquid flow. The liquid enters the center of the liquid inlet chamber 4 from the liquid inlet pipe 2, then spreads to the outer periphery of the liquid inlet chamber 4, and flows upward to the liquid outlet chamber 5 through the passage 12 on the outer periphery, and finally flows out through the liquid outlet pipe 3.

[0058] Among them, please refer to Figure 3 , Figure 4 and Figure 5 , a flow dividing protrusion 6 is provided on the center of the liquid inlet chamber 4, the outer periphery of the flow dividing protrusion 6 has a flow dividing surface 61, the flow dividing protrusion 6 is used to meet the liquid and radiate it outward, thereby improving the heat dissipation uniformity of the radiator.

[0059] Compared with the prior art, the liquid cooling radiator provided by the embodiment of the present application has a container 1, which is divided into double-layer liquid chambers by a partition plate 11, including an inlet liquid chamber 4 and an outlet liquid chamber 5. The double-layer liquid chambers are communicated through a passage 12 around the partition plate 11. An inlet liquid pipeline 2 of the radiator is connected to the center of the radiator and extends into the interior of the radiator, so that the liquid is distributed from the center of the inlet liquid chamber 4 to the periphery, enters the outlet liquid chamber 5 through the communication passage 12, and finally flows out from an outlet liquid pipeline 3. In view of the fact that the heat source of the electronic component gradually decreases from the center to the periphery, the inlet liquid chamber 4 is connected to the mounting portion 13 for transferring the heat source, so that the core of the heat source is located at the center of the inlet liquid chamber 4. Since the inlet liquid pipeline 2 is connected to the center of the inlet liquid chamber 4, the liquid absorbs the heat of the heat source with the highest temperature after entering the inlet liquid chamber 4, and then synchronously absorbs the heat of the periphery of the core of the heat source in a radial manner.

[0060] Compared with the conventional serpentine flow channel design, the inlet liquid pipeline 2 of the liquid cooling radiator of the embodiment of the present application is connected to the center of the radiator and extends into the interior of the radiator, so that the effective stroke of the liquid in the interior of the radiator is shortened. When the temperature of the liquid is the lowest, the heat of the heat source with the highest temperature is directly absorbed, and then gradually diffused to the periphery in a radial manner, so that the heat of the periphery of the core of the heat source is synchronously taken away, thereby effectively improving the heat exchange efficiency and the uniformity of the temperature, and further improving the heat dissipation effect.

[0061] In view of the problem that the liquid directly impacts the bottom surface of the inlet liquid chamber 4 after entering the interior of the radiator, and the flow of the liquid to the periphery is not uniform due to the undirectional throttling, the liquid cooling radiator of the embodiment of the present application further has a flow distribution protrusion 6, which is located at the center of the inlet liquid chamber 4. The flow distribution protrusion 6 is used to meet the entering liquid, and the flow distribution surface 61 around the flow distribution protrusion 6 is used to uniformly diffuse the liquid to the periphery in a radial manner, so that the flow of the liquid diffused from the center of the inlet liquid chamber 4 to the periphery is uniform, and the uniformity of the flow of the liquid is effectively improved.

[0062] The structure of the part where the inlet liquid passage 12 accesses the inlet liquid chamber 4 is improved. In one embodiment of the present application, please refer to Figure 5 and Figure 6 The inlet liquid pipeline 2 is vertically connected to the center of the inlet liquid chamber 4. The inner diameter of the pipe section of the inlet liquid pipeline 2 in the interior of the container 1 is gradually reduced to form a throttling structure 21.

[0063] In the embodiment, as shown in Figure 5 , the direction of the inner diameter of the pipe section of the inlet liquid pipeline 2 around the pipe opening is gradually reduced from large to small, so that the inner wall of the part of the pipe section forms an inclined surface 22 extending upwards to the flow distribution protrusion 6, so that the part of the pipe section of the inlet liquid pipeline 2 is similar to a funnel-shaped structure.

[0064] In this way, liquid enters the center of the liquid inlet chamber 4 through the throttling structure 21, and is evenly distributed to the periphery through the distribution protrusions 6. The funnel-shaped throttling structure 21 is conducive to forming a jet flow of liquid, thereby increasing the liquid pressure in the central region of the liquid inlet chamber 4, promoting the flow of liquid to the periphery, and avoiding the flow instability caused by the backflow of gas phase in the central region of the liquid inlet chamber 4.

[0065] For the specific structure of the distribution protrusions 6, in an embodiment of the present application, please refer to Figure 5 , the distribution protrusions 6 can be preferably configured as tapered protrusions with pointed tips, avoiding blocking the liquid, and allowing the liquid to quickly pass through the pointed tips of the distribution protrusions 6 and then spread to the periphery along the distribution surfaces 61 on the periphery of the distribution protrusions 6.

[0066] Among them, the distribution surfaces 61 on the periphery of the distribution protrusions 6 are preferably concave arc surfaces to smoothly transition the periphery of the distribution protrusions 6 to the bottom surface of the liquid inlet chamber 4. This allows the liquid to be radially distributed to the periphery along the distribution surfaces 61, which is conducive to improving the smoothness of the liquid flow, reducing the hydraulic pressure loss, and effectively ensuring the liquid pressure and flow rate.

[0067] For the structure of the partition plate 11, in an embodiment of the present application, please refer to Figure 7 , the partition plate 11 is located at the end surface of the liquid outlet chamber 5 and is a concave groove surface 111 that is inclined from the periphery to the center. Among them, the deepest part of the concave groove surface 111 corresponds to the position of the pipeline opening of the liquid outlet pipeline 3.

[0068] As shown in Figure 7 , the upper surface of the partition plate 11 is a concave groove surface 111, which forms a slope from the periphery of the partition plate 11 to the deepest part of the concave groove surface 111, and because the deepest part of the concave groove surface 111 corresponds to the position of the pipeline opening of the liquid outlet pipeline 3. Therefore, the liquid in the liquid outlet chamber 5 flows quickly and converges on the pipeline opening of the liquid outlet pipeline 3 to be discharged, effectively improving the heat dissipation effect.

[0069] Preferably, please refer to Figure 7 , the periphery of the partition plate 11 has a guide surface 112 that is inclined into the liquid outlet chamber 5. After the liquid reaching the periphery of the liquid inlet chamber 4 is throttled upward, it quickly changes direction into the liquid outlet chamber 5 and flows out from the liquid outlet pipeline 3, effectively improving the smoothness of the liquid flow between the liquid inlet chamber 4 and the liquid outlet chamber 5.

[0070] In actual application, the liquid in the space from the central region of the liquid inlet chamber 4 to the periphery of the liquid inlet chamber 4 can quickly pass through, which cannot effectively absorb heat, affecting the heat dissipation efficiency of the heat sink. Therefore, it is necessary to set corresponding flow guide structures in the above space to maximize the heat absorption effect of the liquid.

[0071] In this case, the internal structure of the liquid inlet chamber 4 is further improved. In another embodiment of the present application, please refer to Figure 8 , a plurality of flow guides 7 are arranged in the liquid inlet chamber 4 in a ring shape around the outer periphery of the flow dividing protrusion 6, and the plurality of flow guides 7 are arranged in a radial shape from the center of the liquid inlet chamber 4 to the outer periphery.

[0072] In this way, the flow guides 7 are arranged in the liquid inlet chamber 4. On the one hand, the flow guides 7 are used to further divide the liquid, so that the liquid is further diffused. On the other hand, it is beneficial to reduce the flow rate of the liquid, increase the interaction time of the liquid and heat, and further improve the heat absorption saturation of the liquid, thereby effectively improving the heat dissipation effect of the liquid cooling radiator.

[0073] For the specific structure of the flow guide 7, in one embodiment of the present application, please refer to Figure 9 , the flow guide 7 has a proximal end 71 close to the center of the liquid inlet chamber 4 and a distal end 72 away from the center of the liquid inlet chamber 4. The width K of the flow guide 7 gradually decreases from the proximal end 71 to the distal end 72, so that the flow guide 7 is configured as a water drop-shaped protrusion on the bottom surface in the liquid inlet chamber 4.

[0074] In this embodiment, as shown in Figure 9 , the flow guide 7 is a long strip-shaped protrusion. The two ends of the flow guide 7 are arranged as a proximal end 71 close to the center of the liquid inlet chamber 4 and a distal end 72 away from the center of the liquid inlet chamber 4. The width K of the flow guide 7 gradually decreases from the proximal end 71 to the distal end 72, so that the flow guide 7 has a shape similar to a water drop-shaped structure.

[0075] In this way, the water drop-shaped flow guide 7 further divides and diffuses the liquid, so that the temperature of the liquid is more uniform, and the heat dissipation effect is improved.

[0076] Preferably, in one embodiment of the present application, please refer to Figure 7 and Figure 8 , the top of each flow guide 7 is connected with the partition plate 11, so that the inside of the liquid inlet chamber 4 has a plurality of micro-channels separated by the flow guides 7. When the flowing liquid in the liquid inlet chamber 4 reaches the proximal end 71 of each flow guide 7, it can only pass through the two sides of the flow guide 7, thereby realizing further division of the liquid and being beneficial to expand the diffusion range of the liquid.

[0077] Among them, please refer to Figure 9 , the proximal end 71 and the distal end 72 of each flow guide 7 are both arc surfaces, so that the liquid reaching the flow guide 7 can smoothly transition along the arc-shaped end surface, effectively improving the flow smoothness of the liquid on the flow guide 7, and being beneficial to reduce the hydraulic loss.

[0078] In one embodiment of the present application, please refer to Figure 9The connecting position P between the guide vane 7 and the inner bottom surface of the liquid inlet chamber 4 is arc-shaped transition, which is beneficial to increase the heat exchange area and heat conduction capacity, absorb more heat, and further improve the heat absorption effect of the liquid.

[0079] Preferably, in the present embodiment, as shown in Figure 10 , the connecting position P between the guide vane 7 and the inner bottom surface of the liquid inlet chamber 4 can be set as arc-shaped transition starting from the second ring of guide vanes 7 around the outer periphery of the flow distribution protrusion 6, so as to obtain better flow guiding and heat absorption effect.

[0080] For the distribution of the guide vanes 7 in the liquid inlet chamber 4, in an embodiment of the present application, please refer to Figure 10 , the guide vanes 7 around the flow distribution protrusion 6 in the liquid inlet chamber 4 are arranged in multiple annular arrays 70 in inner and outer arrangement, and the guide vanes 7 in adjacent annular arrays 70 are staggered. This is beneficial to increase the convective heat exchange area, make the liquid flow more uniform, and further prevent the local temperature of the heat dissipation object from being too high.

[0081] As an example, as shown in Figure 11 , according to the simulation results, the shape and flow direction of the liquid vortex are observed, and the size of the optimal water droplet-shaped guide vane 7 is obtained: as shown in Figure 12 , wherein r1=0.3mm, r2=0.1mm, and L=2.08mm. In this way, the liquid in the region between the guide vanes 7 in adjacent annular arrays 70 can form a vortex, thereby increasing the residence time of the liquid, which is beneficial to fully absorb heat and improve the heat exchange capacity of the liquid.

[0082] For the distribution rule of the guide vanes 7, it can be preferably set as: as shown in Figure 13 , for the position of each ring of guide vanes, after determining the first ring R1, R2=R1+L / 2, R3=R2+L / 4, R4=R3+L / 4, and so on. Except R2, the rest are Rn+1=Rn+L / 4.

[0083] Among them, for the distribution of the guide vanes 7 on each ring: after determining the first ring R1 and the number n1 of guide vanes 7, α1=360 / n1 is calculated, where α1 is the angle between the guide vanes 7 in the first ring. Each guide vane 7 in the second ring is distributed in the middle of two guide vanes 7 in the first ring. In this way, the guide vanes 7 on each subsequent ring are evenly distributed in a 360-degree circle, and each guide vane 7 is in the middle of two guide vanes 7 in the previous ring. Until the distance between the guide vanes 7 in a certain ring A is greater than 23 times r1, the distance is calculated according to the arc length of the vertex of the guide vane r1. At this time, two guide vanes 7 in the next ring are evenly distributed between the guide vanes 7 in the previous ring, so as to avoid insufficient heat absorption of the liquid and effectively improve the heat exchange efficiency.

[0084] The interval between the guide vanes 7 is specifically set. In an embodiment of the present application, please refer to Figure 10 The guide vanes 7 in the two spaced-apart annular arrays 70 are aligned with each other, and the interval between the aligned guide vanes 7 is the same. As an example, as shown in Figure 14 The interval M between the two aligned guide vanes 7 in the radial direction from the center of the liquid inlet chamber 4 to the outer periphery can be preferably set to 0.8-1.5 mm, and can be specifically preferably set to 1 mm.

[0085] In actual application, the liquid pressure of the liquid flowing in the liquid inlet chamber 4 can be affected by the distribution density of the guide vanes 7, and gradually weakened from the center of the liquid inlet chamber 4 to the outer periphery. In order to reduce the loss of the liquid pressure,

[0086] In another embodiment of the present application, please refer to Figure 10 The guide vanes 7 in the two spaced-apart annular arrays 70 are aligned with each other, and the interval between the aligned guide vanes 7 gradually increases.

[0087] In this way, the distribution density of the guide vanes 7 gradually decreases from the center area of the liquid inlet chamber 4 to the outer periphery, which is beneficial to reduce the loss of the liquid pressure of the liquid flowing in the liquid inlet chamber 4.

[0088] The interval between the guide vanes 7 can also be further optimized according to actual application, including but not limited to the following forms:

[0089] As an example, in an embodiment, please refer to the guide vane 7 arrangement modes of Figure 8 and Figure 10 According to the contact area between the liquid cooling radiator and the heat dissipation object such as a chip, 17 annular arrays 70 can be preferably arranged in the liquid inlet chamber 4, wherein the guide vane 7 intervals between the annular arrays 70 in the first to tenth annular arrays are the same, and the guide vane 7 intervals between the annular arrays 70 from the eleventh to seventeenth annular arrays gradually increase.

[0090] As an example, in another embodiment, the guide vane 7 arrangement modes of Figure 8 and Figure 10 can also be preferably used, wherein 17 annular arrays 70 of guide vanes 7 can be arranged in the liquid inlet chamber 4, wherein the guide vane 7 intervals between the annular arrays 70 in the first to eleventh annular arrays are the same, the guide vane 7 interval between the eleventh and twelfth annular arrays increases to twice, and the guide vane 7 intervals between the annular arrays 70 from the twelfth to seventeenth annular arrays gradually increase.

[0091] It can be seen that the layout of the guide vanes 7 distributed in the liquid inlet chamber 4 can be further adjusted according to actual application requirements, so as to obtain the optimal distribution effect, effectively reduce the loss of the liquid pressure, and further improve the flow uniformity of the liquid.

[0092] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A liquid cooling radiator comprising a container and a liquid inlet pipe and a liquid outlet pipe provided on the container, characterized in that: The inner part of the container is provided with a partition plate, which separates the inner part of the container into a liquid inlet chamber and a liquid outlet chamber along the thickness direction of the container, and a channel is formed between the outer periphery of the partition plate and the inner side wall of the container; an installation part for installing a heating element is arranged on the end face of the container close to the liquid inlet chamber; The liquid inlet pipe and the liquid outlet pipe are arranged on the end face of the container away from the installation part, the liquid inlet pipe extends into the container and is connected to the center part of the liquid inlet chamber, and the liquid outlet pipe is connected to the liquid outlet chamber; The liquid inlet chamber is provided with a flow distribution protrusion in the center of the liquid inlet chamber, the outer periphery of the flow distribution protrusion has a flow distribution surface, and the flow distribution protrusion is used to meet the liquid inlet and radially distribute the liquid outward.

2. The liquid-cooled heat spreader of claim 1, wherein: The liquid inlet pipe is vertically connected to the center of the liquid inlet chamber, and the liquid inlet pipe gradually narrows at the radial pipe opening in the pipe section inside the container to form a throttling structure.

3. The liquid-cooled heat spreader of claim 1, wherein: The flow distribution protrusion is a conical protrusion, and the flow distribution surface on the outer periphery of the flow distribution protrusion is a concave arc surface.

4. The liquid-cooled heat spreader of claim 1, wherein: The end face of the partition plate in the liquid outlet chamber is a groove surface that is inclined from the outer periphery to the center, and the deepest part of the recess on the groove surface corresponds to the position of the pipe opening of the liquid outlet pipe.

5. The liquid-cooled heat spreader of any of claims 1 to 4, wherein: The liquid inlet chamber is also provided with a plurality of flow guide vanes arranged in a ring around the outer periphery of the flow distribution protrusion, and the plurality of flow guide vanes are arranged radially outward from the center of the liquid inlet chamber.

6. The liquid-cooled heat spreader of claim 5, wherein: Each flow guide vane has a proximal end close to the center of the liquid inlet chamber and a distal end away from the center of the liquid inlet chamber, and the width of the flow guide vane gradually decreases from the proximal end to the distal end.

7. The liquid-cooled heat spreader of claim 6, wherein: The top of each flow guide vane is connected to the partition plate, and the proximal end and the distal end of each flow guide vane are both arc surfaces.

8. The liquid-cooled heat spreader of claim 5, wherein: The connection between the flow guide vane and the inner bottom surface of the liquid inlet chamber is an arc transition.

9. The liquid-cooled heat spreader of claim 5, wherein: The flow guide vanes arranged in a ring around the flow distribution protrusion in the liquid inlet chamber form a plurality of layers of annular arrays arranged inside and outside, and the flow guide vanes in adjacent annular arrays are staggered.

10. The liquid-cooled heat spreader of claim 9, wherein: The flow guide vanes in two adjacent annular arrays are aligned with each other, and the distance between the aligned flow guide vanes gradually increases.

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