Archimedes spiral radiating tube with bionic phoenix tree leaf-shaped structure

Abstract

The Archimedes spiral radiating pipe comprises an Archimedes spiral round pipe, two ports of the Archimedes spiral round pipe are an inlet and an outlet respectively, the structure imitating the phoenix tree leaf shape is arranged on the inner wall face of the Archimedes spiral round pipe, the structure is composed of center peaks and side peaks which are distributed alternately, and the center peaks and the side peaks are distributed alternately. The peak top of the central peak is higher than the peak top of the side peak, the height difference between the peak top of the central peak and the peak top of the side peak is equal to the height difference between the peak top of the side peak and the peak valley, and the central peak and the side peak are connected through a parabola to form alternately distributed grooves. The contact area of fluid and the inner wall face is increased, and fluid disturbance is enhanced. Therefore, the fluid can be uniformly distributed in the flowing process, a flowing dead zone is avoided, the pressure loss is reduced, meanwhile, the thermal resistance and the pressure drop are optimized, the heat dissipation requirement of a high-power-density electronic device is met, and the problems of low heat exchange efficiency, fluid retention, high thermal resistance and the like in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation tubes, and particularly to an Archimedes spiral heat dissipation tube with a bionic plane tree leaf shape structure. Background Art

[0002] With the complication and integration of electronic devices and components, the heat generation of electronic components has increased exponentially. Especially for military electronic devices with high power density and high requirements for temperature control environment, traditional heat dissipation technologies, such as air cooling, liquid cooling, and ordinary microchannel radiators, have been widely used in the heat dissipation field of electronic components. These technologies enhance the heat transfer effect by increasing the heat dissipation area or increasing the fluid flow rate. However, with the continuous improvement of the power density of electronic components, traditional heat dissipation methods gradually expose problems such as insufficient heat dissipation efficiency, large thermal resistance, and excessive pressure drop, and it is difficult to meet the heat dissipation requirements of high-power electronic components. In related technologies, for example, the Chinese utility model patent with the publication number CN203686383U discloses a bionic grooved round tube. The inner wall of the round tube is provided with a first groove and a second groove. The cross-sections of the first groove and the second groove are both triangular. The height of the first groove relative to the inner wall is greater than the height of the second groove relative to the inner wall. The first groove and the second groove are alternately and continuously distributed on the inner wall.

[0003] Regarding the above related technologies, the inventor believes that the heat transfer between the flowing reaction medium in the microchannel and the inner wall of the pipeline is limited, and the mixing effect of multiple reaction media in the microchannel is poor.

[0004] In the prior art, microchannel radiators have received extensive attention due to their compact structure and high heat transfer efficiency. However, traditional microchannel radiators usually adopt straight channels or simple curved channel designs. The flow direction of the fluid in the channel is single, and the boundary layer is thick, resulting in limited improvement in heat transfer efficiency. In addition, the inner wall surfaces of traditional microchannel radiators are mostly smooth structures, and the contact area between the fluid and the wall surface is small, making it difficult to effectively enhance the disturbance of the fluid, further limiting the improvement of the heat transfer capacity. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in the related technologies to a certain extent.

[0006] To achieve the above object, the present invention proposes an Archimedes spiral heat dissipation tube with a bionic plane tree leaf-shaped structure, comprising: an Archimedes spiral circular tube, the two ports of the Archimedes spiral circular tube are respectively an inlet and an outlet; the inner wall surface of the Archimedes spiral circular tube is provided with a structure imitating the shape of a plane tree leaf, which is composed of alternately distributed central peaks and side peaks; the peak height of the central peak is higher than the peak height of the side peak, and the height difference between the peak of the central peak and the peak of the side peak is equal to the height difference between the peak of the side peak and the valley; the central peak and the side peak are connected by a parabola to form alternately distributed grooves, so as to increase the contact area between the fluid and the inner wall surface and enhance the fluid disturbance; Expression of a single bionic plane tree leaf structure: y = 0.661x 2 -3.205x - 20 x ∈ (0, 4.29) y = 0.661x 2 +3.205x - 20 x ∈ (-4.29, 0).

[0007] The Archimedes spiral heat dissipation tube with the bionic plane tree leaf-shaped structure of the present invention combines the bionic plane tree leaf structure with the Archimedes spiral circular tube, optimizes the fluid disturbance and heat transfer process, effectively reduces the influence of the boundary layer, improves the heat exchange capacity. Compared with the traditional radiator, the design of this structure enhances the disturbance effect of the fluid, increases the heat exchange area, and forms a secondary flow to improve the heat transfer coefficient, so that the fluid can be evenly distributed during the flow process, avoiding flow dead zones, and reducing the pressure loss. At the same time, it optimizes the thermal resistance and pressure drop, making it suitable for the heat dissipation requirements of high-power density electronic devices, and solving the problems of low heat exchange efficiency, fluid retention, and high thermal resistance in the prior art.

[0008] In addition, the Archimedes spiral heat dissipation tube with the bionic plane tree leaf-shaped structure proposed by the present invention may also have the following additional technical features: Specifically, the vertical distance from the peak of the central peak to the center point of the inner wall surface is 2 mm larger than the vertical distance from the peak of the side peak to the center point.

[0009] Specifically, the vertical distance from the valley to the outer wall surface is 1 mm.

[0010] Specifically, the alternately distributed manner of the central peak and the side peak makes the horizontal distance from the adjacent peak to the center point of the inner wall surface consistent.

[0011] Specifically, the grooves of the bionic plane tree leaf structure are continuously distributed along the Archimedes spiral direction, forming a periodically strengthened heat transfer disturbance area.

[0012] Specifically, during the flow process of the fluid, the boundary layer is destroyed due to the centrifugal force, and a secondary flow is generated through the valleys connected by parabolas to improve the heat transfer coefficient.

[0013] Specifically, the Archimedes spiral circular tube is applicable to the heat dissipation of high-power density electronic devices, and its comprehensive performance after optimizing the thermal resistance and pressure drop is superior to that of traditional microchannel radiators.

[0014] Specifically, it further includes a protective pipe located outside the Archimedes spiral circular tube. A plurality of connectors are fixedly connected to the inner wall of the protective pipe and the outer wall surface of the Archimedes spiral circular tube in a circumferential array. A connecting spring is arranged between two opposite connectors and they are connected to each other through the connecting spring.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of embodiments in conjunction with the drawings, wherein: Figure 1 is a schematic diagram of the Archimedes spiral heat dissipation tube with a bionic phoenix tree leaf-shaped structure of the present invention; Figure 2 is a schematic diagram of the structure of the connecting spring according to an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of the inner wall surface according to an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of the peak and valley according to an embodiment of the present invention; Figure 5 is a schematic diagram of the structure of the phoenix tree leaf according to an embodiment of the present invention; Figure 6 is a temperature distribution diagram of the spiral bionic microchannel radiator and the traditional circular tube of the present invention at the same inlet flow rate and temperature; Figure 7 is a comparison diagram of the heat transfer effect between the embodiment of the present invention and the traditional circular tube microchannel; Figure 8 is a comparison diagram of the average outlet temperature effect between the embodiment of the present invention and the traditional circular tube microchannel.

[0017] As shown in the figure: 1. Inlet; 2. Outlet; 21. Central peak; 22. Side peak; 23. Parabola; 24. Peak and valley; 3. Outer wall surface; 4. Archimedes spiral circular tube; 5. Inner wall surface; 6. Protective pipe; 7. Connector; 8. Connecting spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0019] The Archimedes spiral heat dissipation tube with a biomimetic plane tree leaf shape structure according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0020] As Figures 1-8 shown, the Archimedes spiral heat dissipation tube with a biomimetic plane tree leaf shape structure according to an embodiment of the present invention may include: An Archimedes spiral circular tube 4, with two ports at both ends of the Archimedes spiral circular tube 4 being an inlet 1 and an outlet 2 respectively; The inner wall surface 5 of the Archimedes spiral circular tube 4 is provided with a structure imitating the shape of a plane tree leaf, which is composed of an alternating distribution of a central peak 21 and side peaks 22; The peak height of the central peak 21 is higher than the peak height of the side peak 22, and the height difference between the peak of the central peak and the peak of the side peak is equal to the height difference between the peak of the side peak and the peak valley 24; The central peak 21 and the side peaks 22 are connected by a parabola 23 to form alternating grooves, so as to increase the contact area between the fluid and the inner wall surface and enhance the fluid disturbance; An optional mathematical expression for imitating a plane tree leaf: y = 0.661x 2 -3.205x - 20 x ∈ (0, 4.29) y = 0.661x 2 +3.205x - 20 x ∈ (-4.29, 0).

[0021] An optional Archimedes spiral equation: r = 16θ θ ∈ (0, 4Π) It should be noted that the heat dissipation tube described in this embodiment uses an Archimedes spiral circular tube, and a biomimetic plane tree leaf structure is designed on its inner wall surface. This structure is composed of a central peak and side peaks, forming periodically distributed grooves to improve the heat transfer efficiency. This design imitates the shape of a plane tree leaf in nature, optimizes the fluid flow path, reduces the thermal resistance, and enhances the heat transfer ability.

[0022] Furthermore, as Figures 1-8 shown, the vertical distance from the peak of the central peak 21 to the center point of the inner wall surface is 2 mm larger than the vertical distance from the peak of the side peak 22 to the center point.

[0023] Specifically, due to the greater height of the central peak, the fluid is more strongly disturbed at the peak, accelerating the destruction of the boundary layer and improving the heat transfer efficiency.

[0024] Furthermore, as Figures 1-8 shown, the vertical distance from the peak-valley 24 to the outer wall 3 is 1 mm.

[0025] It should be noted that the design described in this embodiment controls the distance from the peak-valley to the outer wall, enabling the fluid to make the most of the heat exchange effect of the grooves during the flow process.

[0026] Specifically, the optimized peak-valley depth ensures the disturbance effect of the fluid in the channel, making the flow evenly distributed and improving the heat dissipation efficiency.

[0027] Furthermore, as Figures 1-8 shown, the alternating distribution of the central peak 21 and the side peaks 22 makes the horizontal distance from the adjacent peak tops to the center point of the inner wall surface consistent. The grooves imitating the structure of the phoenix tree leaves are continuously distributed along the Archimedean spiral direction, forming a periodically enhanced heat transfer disturbance area. During the flow process, the fluid destroys the boundary layer due to the centrifugal force and generates a secondary flow through the peak-valleys 24 connected by the parabola 23 to enhance the heat transfer coefficient.

[0028] Specifically, the boundary layer is destroyed by the centrifugal force, guiding the fluid to form a secondary flow and improving the heat exchange capacity.

[0029] Furthermore, as Figures 1-8 shown, the Archimedean spiral circular tube 4 is applicable to the heat dissipation of high-power density electronic devices. Its comprehensive performance after optimizing the thermal resistance and pressure drop is superior to that of the traditional microchannel radiator. It also includes a protective pipe 6 located outside the Archimedean spiral circular tube 4, and they are interconnected through a connecting spring 8.

[0030] It should be noted that the protective pipe structure described in this embodiment improves the mechanical strength of the heat dissipation pipe.

[0031] Specifically, the protective pipe and the connecting spring ensure the stable operation of the heat dissipation pipe and improve the heat dissipation efficiency.

[0032] In Figure 1 the shown embodiment, under the condition that the temperature of the outer wall surface of the microchannel is set to 353 K, cooling water with a temperature of 300 K flows in at the inlet. The spiral microchannel structure and a straight circular tube with the same tube length are subjected to simulation calculations. The simulation results are as Figure 6 and Figure 7 shown. Under the same boundary conditions, the water temperature at the outlet of the spiral circular tube increases by more than 31 °C compared with that of the straight circular tube. This shows that the spiral microchannel can improve the heat dissipation capacity.

[0033] In summary, the Archimedes spiral heat dissipation tube with a bionic plane tree leaf-shaped structure in the embodiments of the present invention combines the bionic plane tree leaf structure with the Archimedes spiral circular tube, optimizes the fluid disturbance and heat transfer process, effectively reduces the influence of the boundary layer, improves the heat exchange capacity. The design of this structure enhances the fluid disturbance effect, increases the heat transfer area, forms a secondary flow to enhance the heat transfer coefficient, enables the fluid to be evenly distributed during the flow process, avoids flow dead zones, and reduces the pressure loss. At the same time, it optimizes the thermal resistance and pressure drop, making it suitable for the heat dissipation requirements of high-power density electronic devices, and solves the problems of low heat exchange efficiency, fluid retention, and high thermal resistance in the prior art.

[0034] In the description of this specification, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0035] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0036] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An Archimedean spiral heat dissipation pipe with a bionic paulownia leaf-shaped structure, characterized in that: include: An Archimedean spiral tube (4), wherein two ends of the Archimedean spiral tube (4) are an inlet (1) and an outlet (2); The inner wall surface (5) of the Archimedean spiral tube (4) is provided with a structure in the shape of a phoenix tree leaf, wherein the structure is composed of a central peak (21) and side peaks (22) that are alternately distributed; The peak height of the central peak (21) is higher than the peak height of the side peak (22), and the height difference between the peak of the central peak and the peak of the side peak is equal to the height difference between the peak of the side peak and the peak valley (24); The central peak (21) and the side peak (22) are connected by a parabola (23) to form alternately distributed grooves to increase the contact area between the fluid and the inner wall surface and enhance the fluid disturbance; The structure expression of a single phoenix-like leaf: y=0.661x 2 -3.205x-20 x∈(0,4.29) y=0.661x 2 +3.205x-20 x∈(-4.29,0)。 2. The Archimedean spiral heat dissipation pipe with a bionic paulownia leaf-shaped structure according to claim 1, characterized in that: The vertical distance between the peak of the central peak (21) and the center point of the inner wall surface is 2 mm greater than the vertical distance between the peak of the side peak (22) and the center point.

3. The Archimedean spiral heat dissipation pipe with a bionic paulownia leaf-shaped structure according to claim 2, characterized in that: The vertical distance between the peak valley (24) and the outer wall surface (3) is 1 mm.

4. The Archimedean spiral heat dissipation pipe with a bionic paulownia leaf-shaped structure according to claim 1, characterized in that: The alternating distribution of the central peak (21) and the side peaks (22) ensures that the horizontal distances between adjacent peaks and the center point of the inner wall surface are consistent.

5. The Archimedean spiral heat dissipation pipe with a bionic paulownia leaf-shaped structure according to claim 1, characterized in that: The grooves imitating the paulownia leaf structure are continuously distributed along the direction of the Archimedean spiral, forming a disturbance area that periodically enhances heat transfer.

6. The Archimedean spiral heat dissipation pipe with a bionic paulownia leaf-shaped structure according to claim 1, characterized in that: During the flow of the fluid, the boundary layer is destroyed due to the centrifugal force, and secondary flow is generated through the peaks and valleys (24) connected by the parabola (23) to improve the heat transfer coefficient.

7. The Archimedean spiral heat dissipation pipe with a bionic paulownia leaf-shaped structure according to claim 1, characterized in that: The Archimedean spiral tube (4) is suitable for heat dissipation of high power density electronic devices, and its comprehensive performance after optimization of thermal resistance and pressure drop is better than that of a traditional microchannel heat sink.

8. The Archimedean spiral heat dissipation pipe with a bionic paulownia leaf-shaped structure according to claim 1, characterized in that: It also includes a protective pipe (6) located outside the Archimedean spiral tube (4), wherein the inner wall of the protective pipe (6) and the outer wall surface (3) of the Archimedean spiral tube (4) are both fixedly connected to a plurality of connectors (7) in a circular array, and a connecting spring (8) is provided between two opposing connecting heads (7), and the connecting heads (7) are connected to each other via the connecting spring (8).

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