Heat dissipation structure suitable for vertical climbing of liquid

Abstract

The invention relates to the technical field of liquid heat dissipation, in particular to a heat dissipation structure suitable for vertical climbing of liquid. The heat dissipation structure comprises a fin group which comprises a plurality of fins, each fin is provided with a first heat dissipation pipe with a plurality of bends, and the two ends of each first heat dissipation pipe are exposed out of the side edge of the corresponding fin and are a first inlet and a first outlet respectively; one end face of the heat dissipation substrate is provided with an insertion groove for each fin to be inserted, the other end face of the heat dissipation substrate is provided with a second heat dissipation pipe embedded into the insertion groove, and the second heat dissipation pipe is provided with a second inlet and a second outlet corresponding to the first inlet and the first outlet so as to form a heat pipe loop; the cover plate is arranged on the side face, away from the fin set, of the heat dissipation substrate in a covering mode and abuts against the second heat dissipation pipe, and the other side of the cover plate is attached to the AAU. According to the invention, efficient heat dissipation of the AAU can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of liquid heat dissipation, and in particular to a heat dissipation structure suitable for vertical climbing of liquid. Background Art

[0002] Active antenna processing unit (AAU) is an important component of 5G, and its deployment environment and location are diverse. AUU consists of RRU (remote control radio unit) and passive antenna, and the heat source is distributed in the upper, middle and lower parts. The highly integrated Massive MIMO technology used in it gives AAU powerful performance, but also causes high power consumption, which has become the main reason for the increase in energy consumption of 5G base stations. Correspondingly, high power consumption causes the temperature of the equipment to rise, and excessive temperature affects the stability of the equipment.

[0003] In order to solve the heat dissipation problem of AAU, traditional heat dissipation solutions often rely on the inflatable plate heat dissipation technology. However, when it is placed vertically, its large aperture design easily causes the phase change latent heat medium to settle under the action of gravity. Due to the different thermal conductivity of vapor and liquid, the temperature difference between the upper and lower parts is significant, which hinders the effective heat dissipation of the upper heat source and causes the system performance to decline. Therefore, exploring efficient heat dissipation solutions to cope with the thermal management challenges brought by the high power consumption of AAU has become an urgent need for current research and practice. Summary of the invention

[0004] The purpose of this application is to overcome the above-mentioned technical problems and provide a heat dissipation structure suitable for vertical climbing of liquid, which can achieve efficient heat dissipation of AAU.

[0005] The present application provides a heat dissipation structure suitable for vertical liquid climbing, and the specific scheme is as follows: A heat dissipation structure suitable for vertical climbing of liquid, comprising: a fin group, comprising a plurality of fins, each of the fins being provided with a first heat dissipation tube with a plurality of bends, and two ends of the first heat dissipation tube are exposed from the side of the fin, and are respectively a first inlet and a first outlet; a heat dissipation substrate, one end face being provided with a plug-in slot for plugging in each of the fins, and the other end face being provided with a second heat dissipation tube embedded in the plug-in slot, the second heat dissipation tube being provided with a second inlet and a second outlet corresponding to the first inlet and the first outlet to form a heat pipe loop; a cover plate, which is arranged on a side face of the heat dissipation substrate away from the fin group and abuts against the second heat dissipation tube, wherein the other side of the cover plate is attached to the AAU.

[0006] By adopting the above technical solution, the fin group includes a plurality of fins, each of which is provided with a first heat dissipation tube with a plurality of bends. The two ends of the first heat dissipation tube are exposed from the side of the fin, and are respectively the first inlet and the first outlet. This allows the gas and liquid to circulate on the fin through the first heat dissipation tube to dissipate heat through the fin, thereby improving the heat dissipation efficiency. A plug-in slot for each fin to be plugged in is provided on one end surface of the heat dissipation substrate, and a second heat dissipation tube embedded in the plug-in slot is provided on the other end surface. The second heat dissipation tube is provided with a second inlet and a second outlet corresponding to the first inlet and the first outlet to form a heat pipe loop. This structure ensures that the liquid can smoothly enter the second heat dissipation tube after flowing in the first heat dissipation tube, forming a complete heat exchange loop, further enhancing the heat dissipation effect. One end surface of the cover plate abuts the second heat dissipation tube, and the other end surface is attached to the AAU. The heat of the AAU can be directly transferred to the liquid in the second heat dissipation tube, thereby improving the heating efficiency of the liquid, thereby achieving more efficient gas-liquid circulation pumping while achieving efficient heat dissipation of the AAU.

[0007] Optionally, the first heat dissipation tube and the second heat dissipation tube are provided in a one-to-one correspondence in a plurality, and the corresponding first inlet, the first outlet, the second inlet and the second outlet are provided in a plurality.

[0008] By adopting the above technical solution, the number of the first heat dissipation tubes and the second heat dissipation tubes and the corresponding number of inlets and outlets are increased, multi-circuit heat exchange is achieved, and the overall heat dissipation efficiency and flexibility are improved.

[0009] Optionally, two of the first heat dissipation tubes and the second heat dissipation tubes are arranged in a one-to-one correspondence, wherein the two first heat dissipation tubes are arranged inside and outside the fins, and the two second heat dissipation tubes are arranged at positions corresponding to the two first heat dissipation tubes.

[0010] By adopting the above technical solution, two first heat dissipation tubes and two second heat dissipation tubes are set in a one-to-one correspondence, wherein the two first heat dissipation tubes are arranged inside and outside the fins, and the two second heat dissipation tubes are arranged at the positions corresponding to the two first heat dissipation tubes, which can enhance the heat exchange efficiency of the heat dissipation structure. At the same time, the design of the inner and outer arrangement is conducive to optimizing the spatial layout and improving the compactness of the overall structure.

[0011] Optionally, the second heat dissipation pipe is provided with a plurality of bends.

[0012] By adopting the above technical solution, the second heat dissipation tube is provided with a plurality of bends, which increases the flow path length of the heat dissipation liquid in the second heat dissipation tube, prolongs the residence time of the liquid near the heat source, and enhances the heat exchange effect.

[0013] Optionally, it also includes: baffles, which are arranged on both sides of the fin group and plugged into the plug-in slots.

[0014] By adopting the above technical solution, the baffles are arranged on both sides of the fin group and plugged into the plug-in slots, which can effectively improve the overall structural stability of the fin group and effectively avoid liquid leakage and structural damage caused by external collision during use.

[0015] Optionally, it also includes: a liquid injection tube, which is inserted into the heat dissipation substrate, and the corresponding heat dissipation substrate is provided with a plug hole and a channel connecting the first heat dissipation tube or the second heat dissipation tube.

[0016] By adopting the above technical solution, the design of the liquid injection tube makes the injection of liquid more convenient, effectively improving the filling efficiency and maintenance convenience of the heat dissipation structure.

[0017] Optionally, the cover plate is welded on the heat dissipation substrate.

[0018] By adopting the above technical solution, the cover plate is welded on the heat dissipation substrate, thereby ensuring the stability of the structure and enhancing the heat conduction efficiency.

[0019] Optionally, a fixing piece for fixing is disposed on the peripheral side surface of the heat dissipation substrate, and a through hole is disposed on the fixing piece.

[0020] By adopting the above technical solution, the setting of the fixing parts can fix the heat dissipation structure as a whole, so as to further increase the stability of the heat dissipation structure relative to the AAU.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The fin group cooperates with the first heat pipe and the second heat pipe on the heat dissipation substrate to form a heat pipe loop, which can significantly improve the liquid circulation efficiency, thereby effectively alleviating the temperature rise problem caused by the high power consumption of the AAU; 2. The multiple bends of the first and second heat dissipation pipes increase the flow path of the coolant, improve the heat dissipation efficiency, and further reduce the temperature of the equipment; 3. The corresponding settings of the first heat dissipation pipe and the second heat dissipation pipe can effectively balance the temperature of each part of the AAU, reduce the temperature difference between the upper and lower parts, and thus improve the heat dissipation performance and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a heat dissipation structure suitable for vertical liquid climbing disclosed in the first embodiment of the present application; Figure 2 for Figure 1 An exploded structural schematic diagram of a heat dissipation structure suitable for vertical liquid climbing is shown; Figure 3 for Figure 1 A schematic diagram of a partially exploded structure of a heat dissipation structure suitable for vertical climbing of liquid is shown; Figure 4 for Figure 1 A schematic diagram of the structure of the second heat dissipation tube and the fins shown; Figure 5 is a schematic diagram of the gas-liquid state in the first heat dissipation pipe and the second heat dissipation pipe; Figure 6 This is a structural schematic diagram of a heat dissipation structure suitable for vertical liquid climbing disclosed in the second embodiment of the present application; Figure 7 for Figure 6 The schematic diagram of the structure of the fin group and the heat dissipation substrate shown; Figure 8 for Figure 6 Schematic diagram of the structure of the fin group shown.

[0023] Description of reference numerals: 10. Fin group; 11. Fin; 12. First heat dissipation tube; 121. First inlet; 122. First outlet; 20. Heat dissipation substrate; 21. Plug slot; 22. Second heat dissipation tube; 221. Second inlet; 222. Second outlet; 23. Fixing member; 231. Through hole; 30. Cover plate; 40. Baffle; 50. Liquid injection tube. DETAILED DESCRIPTION

[0024] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to be used as limitations to the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind of", "above", "the" and "this" are intended to also include plural expressions, unless there is a clear indication to the contrary in the context. It should also be understood that the term "and / or" used in the present application refers to and includes any or all possible combinations of one or more listed items.

[0025] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0026] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0027] [First embodiment] See also Figure 1 and Figure 2, is a heat dissipation structure suitable for vertical climbing of liquid disclosed in an embodiment of the present application, including a fin group 10, a heat dissipation substrate 20 and a cover plate 30. The fin group 10 is plugged into one side of the heat dissipation substrate 20, and the cover plate 30 is covered on the other side of the heat dissipation substrate 20 away from the fin group 10, and the side of the cover plate 30 away from the heat dissipation substrate 20 is attached to the AAU, which can conduct heat to the heat source generated when the AAU is working.

[0028] See also Figure 3 The fin group 10 includes a plurality of fins 11 , and a plug-in slot 21 is provided on a side of the heat dissipation substrate 20 opposite to the fins 11 , and the plurality of fins 11 are plugged into the plug-in slot 21 side by side for clamping and fixing.

[0029] A first heat dissipation tube 12 is arranged on each fin 11 , and the first heat dissipation tube 12 has a plurality of bends for increasing the flow path of gas and liquid in the first heat dissipation tube 12 .

[0030] See also Figure 4 Both ends of the first heat dissipation tube 12 are exposed from the side of the fin 11 , and correspond to a first inlet 121 and a first outlet 122 , that is, an inlet and an outlet of the first heat dissipation tube 12 .

[0031] See also Figure 2 and Figure 3 A second heat dissipation tube 22 embedded in the plug-in slot 21 is provided on the other end surface of the heat dissipation substrate 20. The second heat dissipation tube 22 corresponds to the fins 11 and the first heat dissipation tube 12 one by one. Based on the multiple fins 11 in the fin group 10, multiple second heat dissipation tubes 22 are provided on the heat dissipation substrate 20.

[0032] Among them, each second heat dissipation tube 22 is provided with a second inlet 221 and a second outlet 222 corresponding to the first inlet 121 and the first outlet 122. In this way, a heat pipe loop is formed based on the inlets and outlets of the first heat dissipation tube 12 and the second heat dissipation tube 22, and the heat source of the AAU is used for heating. When the heat source heats part of the liquid to the boiling point, the liquid is converted into gas, the volume of the gas increases, and a pressure difference is generated, so that the high-pressure gas pushes the surrounding liquid to flow along the pipeline, forming a gas-liquid circulation pumping. It is explained here that in actual application, when the fin group 10 is vertically plugged into the heat dissipation substrate 20, based on the effect of the gas-liquid circulation pumping, the liquid can achieve vertical climbing along the pipeline.

[0033] See also Figure 5, is the gas-liquid state in the first heat dissipation tube 12 and the second heat dissipation tube 22. In the second heat dissipation tube 22, the liquid absorbs heat and turns into bubbles, which push the liquid to flow into the first heat dissipation tube 12. In this embodiment, the formation and movement of bubbles can be driven by a variety of factors, including density differences, heat conduction, and pressure changes. For example, a slight change in the temperature inside the liquid or a local hot spot can cause local boiling, thereby forming bubbles. Once bubbles are formed, they will move toward low-pressure areas because the density of bubbles in the liquid is usually lower than that of the surrounding liquid, and due to thermodynamic effects, there is more room to expand in low-pressure areas.

[0034] It is worth mentioning here that the first heat dissipation tube 12 and the second heat dissipation tube 22 are capillary tubes. The liquid in the tubes is in contact with the tube walls, so that the liquid has a certain climbing ability in the tubes due to the capillary pumping force generated by the surface tension. In this way, the liquid can reach the heat source area. The heat source area releases heat and the liquid absorbs heat to undergo a gas-liquid phase change. The gas-liquid phase change will cause bubbles to be generated and burst, thereby causing a volume change, driving the fluid to flow.

[0035] In addition, the second heat dissipation tube 22 is provided with a plurality of bends, which can increase the flow path length of the liquid in the second heat dissipation tube 22 and prolong the residence time of the liquid near the heat source to achieve an energy storage effect, thereby enhancing the heat exchange effect and improving the heat dissipation efficiency.

[0036] See also Figure 1 and Figure 2 The cover plate 30 is welded on the heat dissipation substrate 20 to ensure the stability of the structure. At the same time, the heat source of the AAU abuts against the second heat dissipation pipe 22 through the cover plate 30 to achieve heat conduction.

[0037] Here, it is worth mentioning that the heat sources of the AAU are arranged in three rows on the cover plate 30, and the power of each row of heat sources is different. For example, the power of the upper row of heat sources is 6.7 W, the power of the middle row of heat sources is 60 W, and the power of the lower row of heat sources is 6.7 W. The liquid in the second heat dissipation pipe 22 can be heated at different temperatures to promote gas-liquid circulation pumping and improve the overall heat dissipation performance of the heat dissipation structure. Of course, the power of the heat source is not limited here.

[0038] Furthermore, a plurality of fixing members 23 are provided on the peripheral side of the heat dissipation substrate 20, and each fixing member is provided with a through hole 231. For example, by penetrating the through hole 231 with a screw, the heat dissipation structure can be fixed as a whole to further increase the stability of the heat dissipation structure relative to the AAU.

[0039] See also Figure 2In this embodiment, it also includes a liquid injection tube 50, which is inserted into the heat dissipation substrate 20, and the corresponding heat dissipation substrate 20 is provided with a plug hole and a channel connecting the first heat dissipation tube 12 or the second heat dissipation tube 22.

[0040] The design of the liquid injection tube 50 makes the injection of liquid more convenient, effectively improving the filling efficiency and maintenance convenience of the heat dissipation structure. It is explained here that the entire system is to fill a certain amount of liquid (liquid working medium) into the liquid injection tube 50 after high vacuum.

[0041] See also Figure 2 In this embodiment, a baffle 40 is also included, which is arranged on both sides of the fin group 10 and plugged into the plug-in slot 21.

[0042] Among them, the baffles 40 are arranged on both sides of the fin group 10 and plugged into the plug-in slots 21, which can effectively improve the overall structural stability of the fin group 10 and can effectively avoid liquid leakage and structural damage caused by external collision during use.

[0043] In summary, the first embodiment of the present application discloses a heat dissipation structure suitable for vertical climbing of liquid. A first heat dissipation tube 12 with a bend is arranged on each fin 11, and a heat pipe loop is formed in combination with the second heat dissipation tube 22, thereby enhancing the circulation power of the liquid and improving the overall heat dissipation efficiency. When the AAU to which the cover plate 30 is attached is working, it can perform graded heating on the liquid in the second heat dissipation tube 22, thereby effectively reducing the upper and lower temperature differences caused by gravity and improving the heat dissipation uniformity. The first heat dissipation tube 12 and the second heat dissipation tube 22 are arranged in a one-to-one correspondence, and can perform precise heat dissipation according to the specific position of the AAU heat source, thereby optimizing the adaptability of the heat dissipation structure and the overall heat dissipation performance.

[0044] [Second embodiment] See also Figure 6 and Figure 7 , which is a heat dissipation structure suitable for vertical climbing of liquid disclosed in the second embodiment of the present application. Compared with the above-mentioned first embodiment, the number of first heat dissipation tubes 12 and the corresponding number of second heat dissipation tubes 22 on each fin 11 are different, and the corresponding arrangement positions are different. Other same technical features can be found above and will not be repeated here.

[0045] There are a plurality of first heat dissipation tubes 12 and a plurality of second heat dissipation tubes 22 corresponding to each other, and a plurality of corresponding first inlets 121 , first outlets 122 , second inlets 221 and second outlets 222 are also provided to form a plurality of circulation loops.

[0046] See also Figure 8Two first heat dissipation tubes 12 with multiple bends can be provided on each fin 11 . The two first heat dissipation tubes 12 are arranged inside and outside the fin 11 , corresponding to the inner heat dissipation tube and the outer heat dissipation tube, thereby realizing a two-in-two-out mode for each fin 11 .

[0047] In normal operation, the heat brought out by the inner heat pipe is transferred to the outer heat pipe through the cover plate 30 (metal material), that is, the outer heat pipe is partially heated, and at the same time, the inner heat pipe plays a catalytic role on the outer heat pipe, which is beneficial to improve the circulation efficiency.

[0048] Of course, it is explained here that the number of first heat dissipation tubes 12 and the corresponding number of second heat dissipation tubes 22 on each fin 11 in the embodiment of the present application are not limited and can be set based on the power corresponding to the AAU heat source. For example, when the power of the heat source is ≤500W, a one-in-one-out mode structure (that is, the technical solution of the first embodiment above) can be adopted; when the power of the heat source is greater than 500W, a two-in-two-out mode structure (that is, Figure 6 ).

[0049] In summary, the second embodiment of the present application discloses a heat dissipation structure suitable for vertical climbing of liquid. By arranging a first heat dissipation tube 12 with a bend on the fin 11 and forming a heat pipe loop with the second heat dissipation tube 22 on the heat dissipation substrate 20, the liquid circulation efficiency is improved and the overall heat dissipation performance is enhanced. The heat sources at different positions of the AAU abut against the second heat dissipation tube 22 through the cover plate 30, and the liquid in the tube is heated at different temperatures, which effectively solves the problem of upper and lower temperature differences caused by gravity when the traditional heat dissipation solution is placed vertically. The two-in-two-out mode structure of the first heat dissipation tube 12 and the second heat dissipation tube 22 can further enhance the overall heat dissipation capacity, improve the circulation efficiency of gas and liquid, and thus improve the heat dissipation effect.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat dissipation structure suitable for vertical liquid climbing, characterized in that: include: A fin group (10) comprising a plurality of fins (11), each of the fins (11) being provided with a first heat dissipation tube (12) having a plurality of bends, and two ends of the first heat dissipation tube (12) being exposed from the side of the fin (11), and being a first inlet (121) and a first outlet (122); A heat dissipation substrate (20), one end surface of which is provided with a plugging slot (21) for each of the fins (11) to be plugged in, and another end surface of which is provided with a second heat dissipation tube (22) embedded in the plugging slot (21), the second heat dissipation tube (22) being provided with a second inlet (221) and a second outlet (222) corresponding to the first inlet (121) and the first outlet (122), so as to form a heat pipe loop; A cover plate (30) is arranged on a side surface of the heat dissipation substrate (20) away from the fin group (10) and abuts against the second heat dissipation tube (22), wherein the other side of the cover plate (30) is attached to the AAU.

2. The heat dissipation structure suitable for vertical liquid climbing according to claim 1, characterized in that: The first heat dissipation tube (12) and the second heat dissipation tube (22) are arranged in a one-to-one correspondence in a plurality, and the corresponding first inlet (121), the first outlet (122), the second inlet (221) and the second outlet (222) are arranged in a plurality.

3. The heat dissipation structure suitable for vertical liquid climbing according to claim 2, characterized in that: The first heat dissipation tube (12) and the second heat dissipation tube (22) are arranged in a one-to-one correspondence, wherein the two first heat dissipation tubes (12) are arranged inside and outside the fin (11), and the two second heat dissipation tubes (22) are arranged at positions corresponding to the two first heat dissipation tubes (12).

4. The heat dissipation structure suitable for vertical liquid climbing according to claim 1, characterized in that: The second heat dissipation pipe (22) is provided with a plurality of bends.

5. The heat dissipation structure suitable for vertical liquid climbing according to claim 1, characterized in that: Also includes: The baffles (40) are arranged on both sides of the fin group (10) and inserted into the insertion slots (21).

6. The heat dissipation structure suitable for vertical liquid climbing according to claim 1, characterized in that: Also includes: The liquid injection tube (50) is inserted on the heat dissipation substrate (20), and the corresponding heat dissipation substrate (20) is provided with a plug hole and a channel connected to the first heat dissipation tube (12) or the second heat dissipation tube (22).

7. According to the heat dissipation structure suitable for vertical liquid climbing according to claim 1, the cover plate (30) is welded on the heat dissipation substrate (20).

8. According to the heat dissipation structure suitable for vertical liquid climbing according to claim 1, a fixing member (23) for fixing is provided on the peripheral side of the heat dissipation substrate (20), and a through hole (231) is provided on the fixing member (23).

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