Plant vascular bundle bionic directional wick and manufacturing method thereof

Abstract

The invention discloses a plant vascular bundle bionic directional wick and a manufacturing method thereof, and relates to the technical field of wick, the plant vascular bundle bionic directional wick comprises a matrix and a plurality of diversion layers; the base body is provided with a circulation area; the multiple flow guide layers are arranged in the circulation area in the height direction of the base body; the flow guide layer comprises a plurality of guide strips, and a micro-channel is formed between every two adjacent guide strips. The guide strips are arranged to simulate vascular bundle structures in plants, a micro-channel is formed between every two adjacent guide strips, and under the action of capillary force, a liquid working medium located in a circulation area moves in the channels; the guide strips of every two adjacent flow guide layers are arranged in a staggered mode, on one hand, the capillary effect can be enhanced, the working medium is accelerated to flow from one end to the other end of the circulation area, and on the other hand, the working medium flowing direction can be controlled through the staggered structure design; a strong capillary force is generated through a simple structure, the purpose of controlling liquid to flow in the set direction is achieved, and long-distance conveying of a working medium is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of liquid absorbing cores, and particularly relates to a plant vascular bundle bionic directional liquid absorbing core and a manufacturing method thereof. BACKGROUND

[0002] Compared with a traditional air cooling or single-phase liquid cooling scheme, a heat pipe utilizes latent heat of phase change of a working medium to transfer heat, has advantages of low thermal resistance, excellent uniform temperature, long heat transfer distance, and the like, and can meet high heat flow density heat dissipation requirements of the order of kilowatts. A core heat transfer component of the heat pipe is a liquid absorbing core, the liquid absorbing core drives condensed working medium to flow back to an evaporation end through capillary force to realize a continuous phase change cycle; therefore, performance of the liquid absorbing core directly determines efficiency of a heat dissipation device. Although powder sintering liquid absorbing cores (such as copper powder and nickel powder sintering) in the related art have high capillary force, randomness of a micro-pore structure is strong, liquid flow back resistance is large, and local dryout is easily formed, and manufacturing cost is high. SUMMARY

[0003] The application aims to provide a plant vascular bundle bionic directional liquid absorbing core, which generates strong capillary force through a simple structure and achieves the purpose of controlling liquid flow along a set direction, and realizes long-distance transportation of the working medium.

[0004] The application further provides a manufacturing method of the plant vascular bundle bionic directional liquid absorbing core.

[0005] To solve the above technical problems, the technical scheme adopted by the application is as follows: The application provides a plant vascular bundle bionic directional liquid absorbing core, which comprises: a base body provided with a flow-through area; a plurality of flow guide layers, the plurality of flow guide layers are arranged in the flow-through area along a height direction of the base body; the flow guide layer comprises a plurality of guide strips, the plurality of guide strips are arranged side by side; a micro channel is formed between two adjacent guide strips; guide strips of two adjacent flow guide layers are arranged in a staggered manner.

[0006] According to the plant vascular bundle bionic directional liquid absorbing core provided by the application, the guide strips of the two adjacent flow guide layers are arranged in a symmetrical manner relative to a flow guide direction of the plant vascular bundle bionic directional liquid absorbing core.

[0007] According to the plant vascular bundle bionic directional liquid absorbing core provided by the application, an included angle between an extension direction of the guide strip and the flow guide direction of the plant vascular bundle bionic directional liquid absorbing core is 5°-30°.

[0008] According to the plant vascular bundle bionic directional liquid absorbing core provided by the application, the included angles between the extension directions of the different guide strips and the flow guide direction of the plant vascular bundle bionic directional liquid absorbing core are equal.

[0009] The width of the guide strip is 0.2-0.4 mm, and the thickness is 0.04-0.2 mm.

[0010] The width of the microchannel is 0.2-0.4 mm.

[0011] The base body is a cuboid, and the length direction of the base body is the flow direction of the plant vascular bundle biomimetic directional wicking core.

[0012] The manufacturing method of the plant vascular bundle biomimetic directional wicking core provided in the second aspect of the present application comprises the following steps: A three-dimensional model is established according to the structure of the plant vascular bundle biomimetic directional wicking core, and a 3D printing processing track file is generated; Metal powder is used as raw material, and laser sintering process is used for printing.

[0013] The manufacturing method of the plant vascular bundle biomimetic directional wicking core provided in the second aspect of the present application comprises the following steps: Metal powder is laid in the powder supply area, and the particle size of the metal powder is 15-50 um; A metal substrate is installed in the forming area, the 3D printing processing track file is imported, the working parameters are adjusted, the filling power is adjusted to 90-240 W, the filling speed is adjusted to 750-1750 mm / s, and the oxygen content in the processing manufacturing environment is less than 0.05%.

[0014] The manufacturing method of the plant vascular bundle biomimetic directional wicking core provided in the second aspect of the present application comprises the following steps: The wicking core after printing is cleaned by ultrasonic wave.

[0015] The present application has at least the following beneficial effects: The guide strips imitate the vascular bundle structure in plants, micro-channels are formed between two adjacent guide strips, liquid working medium in the flow area moves in the micro-channels under the action of capillary force; the guide strips of two adjacent guide layers are staggered, on one hand, the capillary action is strengthened, and the liquid working medium flows from one end to the other end of the flow area is accelerated, on the other hand, the flow direction of the working medium is controlled through the design of the staggered structure, so that the liquid flows rapidly in the set direction, and the flow in the direction perpendicular to the set direction is blocked; a strong capillary force is generated through a simple structure, and the purpose of controlling the liquid to flow in the set direction is achieved, and long-distance transportation of the working medium is realized.

[0016] The present application imitates the vascular bundle structure in plants, the vascular bundle plays a role in supporting and transporting water in the plant vein, and the vascular bundle is also arranged in a long strip in the vein; based on the vein structure, the present application comprises a base body and a plurality of guide layers, has the functions of supporting and transporting water, and guides the liquid working medium to flow rapidly in the set direction through the included angle formed by the staggered guide strips, so that the structure has directionality. The liquid working medium flows rapidly in the flow area through the plurality of guide layers and the staggered guide strips of two adjacent guide layers; the two sides of the plurality of guide layers also have apertures, and can be applied to an ultrathin heat pipe on the gas-liquid surface, the apertures on the two sides of the plurality of guide layers can be used as gas channels of the ultrathin heat pipe, so as to reduce the thickness of the ultrathin heat pipe on the gas-liquid surface. Generally, the wick is made of a hydrophilic material, and the contact angle of the liquid working medium on the surface of the wick is below 20°, so as to ensure the capillary effect; for example, the wick can be made of copper powder, stainless steel and alloy powder materials. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and examples; Figure 1 is a schematic diagram of the overall structure of the plant vascular bundle bionic directional wick provided by the embodiment of the present application; Figure 2 is an enlarged view of A in Figure 1 ; Figure 3 is a schematic diagram of the structure of the plant vascular bundle bionic directional wick provided by the embodiment of the present application; Figure 4 is an enlarged view of B in Figure 3 ; Figure 5 is a schematic diagram of the structure of the plant vascular bundle bionic directional wick provided by the second embodiment of the present application; Figure 6 is an enlarged view of C in Figure 5 ; Figure 7 is a schematic diagram of the structure of the plant vascular bundle bionic directional wick provided by another embodiment of the present application; Figure 8 is a cross-sectional view of a plant vascular bundle biomimetic directional wicking core according to another embodiment of the present application; Figure 9 is an exploded view of a plant vascular bundle biomimetic directional wicking core according to another embodiment of the present application.

[0018] In the drawings, the following signs are marked: 100, base; 110, flow-through region; 120, air channel; 130, liquid injection hole; 140, base; 150, top cover; 200, flow guide layer; 210, guide strip; 220, micro channel; α, included angle. DETAILED DESCRIPTION

[0019] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with figures, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0020] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0021] In the description of the present application, if there is a word such as "several" or the like, the meaning is one or more, the meaning of more is two or more, greater than, less than, more than, etc. is not included in the number, above, below, within, etc. is understood to include the number. If it is described as first, second, third, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0022] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be understood broadly, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0023] Reference Figures 1 to 6 , the following will give several embodiments of a plant vascular bundle biomimetic directional wicking core and its manufacturing method.

[0024] As Figures 1 to 2As shown, the plant vascular bionic directional wicking core of the first aspect of the present application includes a substrate 100 and a plurality of flow guide layers 200; the substrate 100 is provided with a flow-through area 110; the plurality of flow guide layers 200 are arranged along the height direction of the substrate 100 in the flow-through area 110; the flow guide layer 200 includes a plurality of guide strips 210, and the plurality of guide strips 210 are arranged side by side; a microchannel 220 is formed between the two adjacent guide strips 210; and the guide strips 210 of the two adjacent flow guide layers 200 are staggered.

[0025] By imitating the vascular structure in the plant through the guide strips 210, the microchannels 220 are formed between the two adjacent guide strips 210, and the liquid working medium located in the flow-through area 110 moves in the microchannels 220 under the action of capillary force; the guide strips 210 of the two adjacent flow guide layers 200 are staggered, which can on the one hand strengthen the capillary action and accelerate the flow of the liquid working medium from one end to the other end of the flow-through area 110, and on the other hand control the flow direction of the working medium through the design of the staggered structure, so that the liquid flows rapidly in the set direction and is blocked in the direction perpendicular to the set direction; a stronger capillary force is generated through a simple structure, and the purpose of controlling the liquid to flow along the set direction is achieved, and long-distance transportation of the working medium is realized.

[0026] The vascular bundle plays a supporting and water transportation role in the plant vein, and the vascular bundle is also arranged in a long strip in the vein; the guide strips 210 of the present application are staggered, and the multiple guide strips 210 are staggered to form a through hole, so as to imitate the vascular structure of the leaf vein and achieve the effect of guiding the rapid directional flow of the working medium. The vascular structure in the leaf vein structure is imitated in the present application, and based on the leaf vein structure, the present application includes the substrate 100 and the plurality of flow guide layers 200, which has the supporting and water transportation role, and the guide strips 210 are staggered to form an included angle a to guide the rapid flow of the liquid working medium in the set direction, so that the structure has directionality. The liquid working medium is rapidly moved in the flow area 110 through the plurality of flow guide layers 200 and the staggered arrangement of the guide strips 210 of the two adjacent flow guide layers 200; in this way, the two sides of the substrate 100 also have pores, which can be applied to the ultrathin heat pipe on the gas-liquid surface, and the pores on the two sides of the plurality of flow guide layers can be used as the gas channel of the ultrathin heat pipe, so as to reduce the thickness of the ultrathin heat pipe on the gas-liquid surface. Generally, the wicking core is made of hydrophilic material, and the contact angle of the liquid working medium on the surface of the wicking core is below 20°, so as to ensure the capillary effect; for example, the wicking core can be made of copper powder.

[0027] Please refer to Figures 1 to 4The application is stacked by multiple guide layers 200, and the guide strips 210 of two adjacent guide layers 200 are staggered, the included angle alpha formed by the staggered guide strips 210 guides the liquid working medium to flow quickly in the set direction, improves the capillary liquid absorption capacity, reduces the heat transfer thermal resistance, and increases the heat transfer efficiency; and the process is simple, the cost is controllable; the distance between the guide strips 210 can be adjusted according to actual needs, and then the width of the micro channel 220 is adjusted, which has urgent significance for breaking through the heat dissipation bottleneck of high-power electronic equipment.

[0028] Generally, the base body 100 is a plate body, wherein the side of the base body 100 away from the guide layer 200 is a plane, which is convenient for the heat source to abut on the base body 100 for heat transfer; the base body 100 and the multiple guide layers 200 can be integrally formed; for example, additive manufacturing can be performed on a metal substrate by a metal 3D printing technology; the material of the metal substrate is selected according to the corresponding printing material.

[0029] Please refer to Figures 1 to 2 The multiple guide strips 210 of the same guide layer 200 are arranged side by side, and the micro channel 220 is formed between the adjacent guide strips 210 through the simple arrangement of the multiple guide strips 210, which is simple in structure, convenient to process, and easy to adjust the size of the micro channel; through the staggered arrangement of the guide strips of two adjacent guide layers 200, the liquid working medium can quickly flow in the set direction through the simple structure.

[0030] In the ultrathin heat pipe on the gas-liquid interface, the plant vascular biomimetic directional wicking core imitates the vascular bundle in the leaf vein, plays a dual role of supporting and transporting working medium, and realizes the function of directional transportation through the staggered arrangement of the specific angles between the guide strips 210 of different guide layers 200; when the ultrathin heat pipe or heat pipe is working normally, the liquid working medium in the wicking core at one end is converted into gas state through phase change and heat absorption, the gas state working medium flows to the other end, and the gas state working medium releases heat and condenses into liquid state; through the capillary force of the micro channel 220 in the plant vascular biomimetic directional wicking core of the embodiment, the liquid can freely diffuse in the wicking core; due to the influence of the staggered arrangement of the two adjacent guide strips 210, the liquid working medium diffuses along the set direction, and the effect of directional flow is achieved; after the liquid flows to the heating end, the phase change process is repeated, and the heat dissipation effect is achieved.

[0031] It can be understood that the liquid working medium flows from one end to the other end, and due to the staggered arrangement of the guide strips 210 of two adjacent guide layers 200 to form an included angle alpha, the gap between the two guide strips 210 forming the included angle alpha is the smallest, according to the capillary principle, the liquid tends to flow to the end with smaller gap, therefore, the liquid working medium flowing in the guide layer 200 moves along the bisector of the included angle alpha between the guide strip 210 of the guide layer 200 and the guide strip 210 of the adjacent guide layer 200.

[0032] Referring to Figures 1 to 2 In some embodiments, the guide strips 210 of two adjacent flow guide layers 200 are symmetrically arranged relative to the flow direction of the plant vascular bundle biomimetic oriented wick, so that the bisector of the included angle a between any two adjacent guide strips 210 of the plant vascular bundle biomimetic oriented wick is arranged along the flow direction, thereby unifying the flow direction of the liquid working medium in the wick.

[0033] Referring to Figures 3 to 4 In some embodiments, the included angle a between the extension direction of the guide strip 210 and the flow direction of the plant vascular bundle biomimetic oriented wick is 5°-30°, so as to limit the size of the included angle a between the guide strips 210 of two adjacent flow guide layers 200, thereby guiding the liquid working medium to flow quickly in a set direction, improving the capillary wicking capacity, reducing the heat transfer thermal resistance, increasing the heat transfer efficiency, and in addition, the high capillary force and the smooth gas passage can be considered.

[0034] Referring to Figures 3 to 4 In some embodiments, the included angles a between the extension directions of different guide strips 210 and the flow direction of the plant vascular bundle biomimetic oriented wick are equal, which is convenient for processing and makes the flow speed and direction of the liquid working medium at different positions tend to be consistent; for example, the plant vascular bundle biomimetic oriented wick includes four flow guide layers 200, which are a first flow guide layer 200, a second flow guide layer 200, a third flow guide layer 200 and a fourth flow guide layer 200; the first flow guide layer 200, the second flow guide layer 200, the third flow guide layer 200 and the fourth flow guide layer 200 are arranged in sequence along the height direction of the plant vascular bundle biomimetic oriented wick; the extension directions of the guide strips 210 of the first flow guide layer 200 and the third flow guide layer 200 are the same, and the extension directions of the guide strips 210 of the second flow guide layer 200 and the fourth flow guide layer 200 are the same; the included angles a of the first flow guide layer 200, the second flow guide layer 200, the third flow guide layer 200 and the fourth flow guide layer 200 with the flow direction are all 20°.

[0035] In some embodiments, the width of the guide strip 210 is 0.2-0.4mm, and the thickness is 0.04-0.2mm, which can ensure that the plant vascular bundle biomimetic oriented wick has sufficient supporting force while ensuring the capillary effect; if the width of the guide strip 210 is too large, the overall weight of the plant vascular bundle biomimetic oriented wick will increase, and the material cost will also increase; if the width of the guide strip 210 is too small, the overall supporting force of the plant vascular bundle biomimetic oriented wick will be affected; if the thickness of the guide strip 210 is too large, the capillary effect will be reduced, and the flow of the liquid working medium will be affected; if the thickness of the guide strip 210 is too small, the overall supporting force of the plant vascular bundle biomimetic oriented wick will be affected.

[0036] In some embodiments, the width of the micro-channel 220 is 0.2-0.4 mm to ensure the capillary effect, so that the plant vascular bundle biomimetic directional wicking core moves from one end to the other end under the action of capillary force.

[0037] Please refer to Figures 3 to 4 In some embodiments, the base body 100 is a cuboid, and the length direction of the base body 100 is the flow direction of the plant vascular bundle biomimetic directional wicking core. Correspondingly, the flow guide layer 200 is in the shape of a cuboid. The guide strips 210 of the adjacent two flow guide layers 200 are staggered to guide the liquid working medium to flow quickly along the flow direction. The length direction of the base body 100 is taken as the flow direction to guide the liquid working medium to flow along the length direction of the base body 100, so as to make full use of the space in the length direction of the plant vascular bundle biomimetic directional wicking core to achieve long-distance transportation of the working medium. Of course, in other embodiments, the base body 100 can be in other shapes such as a flat circular shape, a flat elliptical shape, or a square shape, and the embodiments of the present application do not particularly limit this.

[0038] Embodiment one and embodiment two are provided in the present application. Please refer to Figures 3 to 4 In embodiment one, the base body 100 is in the shape of a cuboid with a length of 35 mm, a width of 7 mm, and a thickness of 0.5 mm. The guide strip 210 is in the shape of a cuboid with a width of 0.2-0.4 mm and a thickness of 0.05-0.2 mm. The length direction of the base body 100 is the flow direction. The flow guide layer 200 is provided with six layers. The guide strips 210 of the adjacent two flow guide layers 200 are staggered. The included angle α between the guide strip 210 and the flow direction is 25°, that is, the included angle between the guide strips 210 of the adjacent two flow guide layers 200 is 50°. Please refer to Figures 5 to 6 In embodiment two, the base body 100 is in the shape of a flat circle with a diameter of 35 mm. The guide strip 210 is in the shape of a cuboid with a width of 0.2-0.4 mm and a thickness of 0.05-0.2 mm. The flow guide layer 200 is provided with six layers. The guide strips 210 of the adjacent two flow guide layers 200 are staggered. The included angle between the guide strips 210 of the adjacent two flow guide layers 200 is 50°. The heat source is placed at the center of the base body 100. In actual use, the liquid working medium in embodiment one flows along the length direction of the base body 100, and the liquid working medium in embodiment two moves along the extension direction of the bisector of the included angle between the guide strips 210 of the adjacent two flow guide layers 200. Through embodiment one and embodiment two, it can be verified that the plant vascular bundle biomimetic directional wicking core of the embodiments of the present application makes the liquid working medium flow quickly in the specified direction (i.e., the extension direction of the bisector of the included angle between the guide strips 210 of the adjacent two flow guide layers 200) and is blocked in the direction perpendicular to the specified direction, so as to achieve the control of the liquid flow direction and the flow of the liquid in the direction for a longer distance.

[0039] The manufacturing method of the plant vascular biomimetic directional wicking core provided by the second aspect of the present application is characterized in that, based on the plant vascular biomimetic directional wicking core of any embodiment of the first aspect, the manufacturing method comprises the following steps: According to the structure of the plant vascular biomimetic directional wicking core, a three-dimensional model is established, and a 3D printing processing track file is generated; Metal powder is used as the raw material, and laser sintering process is used for printing.

[0040] The processing technology of metal 3D printing is used to integrally form the substrate 100 and the plurality of flow guide layers 200, eliminate the interface thermal resistance, reduce the processing difficulty, and improve the yield rate; only a three-dimensional model needs to be designed according to the structure of the plant vascular biomimetic directional wicking core, and a 3D printing processing track file is generated, and the 3D printing processing track file is imported into the metal 3D printing system for printing; the operation is simple, the processing production is convenient, and the specific structure parameters of the plant vascular biomimetic directional wicking core can be changed according to the use requirements.

[0041] The material of the plant vascular biomimetic directional wicking core is one or a combination of aluminum alloy, stainless steel, titanium alloy or nickel alloy, therefore, the material of the metal powder can be one or several of aluminum alloy, stainless steel, titanium alloy or nickel alloy. The aluminum alloy has high thermal conductivity, is conducive to rapid heat transfer, and has low cost; the stainless steel has good mechanical properties, can withstand high pressure and working stress, and can adapt to a working temperature of-200°C to 400°C; the titanium alloy has extremely high specific strength, the strength is close to that of steel, the density is only about 4.5 , which is conducive to realizing the lightweight of the wicking core; the nickel alloy can maintain excellent mechanical properties and chemical stability under extreme high temperature conditions, and can resist high temperature oxidation, sulfur corrosion, carburizing and other extreme chemical environments.

[0042] The three-dimensional model can be drawn by SOLIDWORKS2018 three-dimensional software, for example, the substrate 100 is a cuboid with a length of 35mm, a width of 7mm and a thickness of 0.5mm, the guide strip 210 is a cuboid with a width of 0.2-0.4mm and a thickness of 0.05mm, the micro channel 220 has an angle of 5-45°, six flow guide layers 200 are laid, the basic model modeling is completed, the STL file is exported, the STL file is imported into the metal 3D printing system for slicing, the slicing thickness is 0.03-0.05mm, and the corresponding support is generated.

[0043] For example, Figures 7 to 8As shown, in some embodiments, the base body 100 can be a shell, and the plurality of flow guide layers are located in the shell; the two sides of the plurality of flow guide layers 200 form air passages 120 for the gaseous working medium to flow through, thereby ensuring the heat dissipation cycle; the shell has a first end and a second end arranged oppositely, the first end is provided with a printing bottom surface, and the second end is provided with a liquid injection hole 130, which is communicated with the inside of the shell and is used for vacuum extraction and filling of the working medium; the liquid injection hole 130 needs to be closed after vacuum extraction and liquid injection. A closed cavity is formed in the shell to prevent the working medium from flowing out; wherein the shell and the plurality of flow guide layers 200 are made of the same material and are integrally printed by metal 3D printing technology, so that the base body 100 and the plurality of flow guide layers 200 are tightly connected, the thickness of the heat conduction bottom plate can be adjusted to meet the heat dissipation scheme under some extreme space limitations and meet different size requirements even complex patterns to meet the miniaturization heat dissipation requirements of electronic equipment. When printing, the printing bottom surface of the first end of the shell is first formed on the table surface of the printer, and then it is printed layer by layer along the extension direction of the plant vascular bundle biomimetic directional liquid absorption core, and finally the printing of the plant vascular bundle biomimetic directional liquid absorption core is completed. The wall thickness of the shell and the thickness of the flow guide layer can be adjusted according to the actual requirements on the premise of meeting the strength requirements.

[0044] As shown, Figure 9 In some embodiments, the shell includes a base 140 and a top cover 150, and the base 140 and the top cover 150 are connected by buckling; in this way, the base 140 and the top cover 150 can be printed with different materials, which has high adaptability; the plurality of flow guide layers are integrally printed, the base 140 and the top cover 150 are printed or machined respectively, then the plurality of flow guide layers 200 are placed in the base, the top cover 150 is buckled, and welding packaging is performed, thereby completing the manufacturing of the plant vascular bundle biomimetic directional liquid absorption core heat pipe.

[0045] A plurality of plant vascular bundle biomimetic directional liquid absorption cores can be printed on a metal substrate at one time, and the final product can be obtained by simple wire cutting, which has a simple process and short manufacturing time.

[0046] In some embodiments, "metal powder is used as raw material, and laser sintering process is used for printing", which includes: Metal powder is laid in the powder supply area, and the particle size of the metal powder is 15-50um; A metal substrate is installed in the forming area, a 3D printing processing track file is imported, working parameters are adjusted, the filling power is adjusted to 90-240W, the filling speed is adjusted to 750-1750mm / s, and the oxygen content of the processing manufacturing environment is less than 0.05%.

[0047] By limiting the particle size of the metal powder, the specific surface area of the metal powder can be increased, thereby increasing the laser absorption rate and reducing the laser power requirement; by adjusting the filling speed and filling power, the machining precision of the microchannel 220 is improved to ensure the integrity of the pores in the structure and to generate micron-scale particle adhesion structures in the gaps, thereby enhancing the capillary action; by controlling the oxygen content of the processing and manufacturing environment, metal high-temperature oxidation can be avoided, the risk of microchannel 220 blockage can be reduced, and the yield can be improved.

[0048] The designed three-dimensional model is imported into the metal 3D printing system, and after system slicing processing, the slice thickness can be 0.03-0.05mm, the metal powder is laid layer by layer, and the laser is used to process and form the designed structure area, then a layer of metal powder is laid and the next layer of structure is scanned by laser, and the final liquid absorption core structure is formed layer by layer. During preparation, the laser power needs to be adjusted according to different materials; when manufacturing, taking 316L stainless steel powder as an example, the particle size is 15-50um, a sufficient amount of 316L stainless steel powder is laid in the powder supply area, the powder can be appropriately loose to ensure the integrity of the formed pores, an iron metal substrate is installed in the forming area, the model file after slicing is imported, the laser parameters are adjusted, the filling power is 140W, the filling speed is 750mm / s, the oxygen content of the processing and manufacturing environment is controlled to be less than 0.05%, the printing thickness is 0.1mm-2mm, and due to the influence of part of the powder that cannot be melted in time and the surface tension of the metal liquid, micron-scale particles adhere to the pore wall of the structure, which greatly enhances the capillary force; by adjusting the structure of the three-dimensional model and cooperating with the laser parameters of processing, the size of the printed pores can be adjusted, the pores between layers are connected to each other, and a large number of micron-scale particles adhere to the pore wall, which increases the roughness of the structure and significantly enhances the capillary liquid absorption capacity. In some embodiments, after the "metal powder as raw material, laser sintering process is used for printing", the method further comprises: The printed liquid absorption core is cleaned by ultrasonic wave.

[0049] The plant vascular bundle biomimetic directional liquid absorption core after metal 3D printing is cleaned by ultrasonic wave to remove the residual metal powder in the laser sintering process and improve the quality of the finished product.

[0050] The embodiment of the application also provides a heat pipe comprising a shell and the plant vascular bundle biomimetic directional liquid absorption core of any embodiment of the first aspect, and the plant vascular bundle biomimetic directional liquid absorption core is installed in the shell.

[0051] It can be understood that the plant vascular bundle biomimetic directional liquid absorption core has the beneficial effects of the above embodiments, and the heat pipe accordingly has the beneficial effects of the above embodiments, and the specific implementation manner can refer to the above embodiments, which will not be described herein again.

[0052] The preferred embodiments of the present application have been disclosed with specific reference to a preferred embodiment, to all embodiments within the scope of the following claims as equivalents of the embodiments disclosed in detail, and to all equivalents of those embodiments.

Claims

1. A plant vasculature biomimetic directional wicking core, characterized in that, The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core.

2. The plant vasculature biomimetic oriented wicking core of claim 1, wherein, The application relates to a plant vascular bundle biomimetic directional wicking core.

3. The vascular biomimetic directed wicking core of claim 1, wherein, The application relates to a plant vascular bundle biomimetic directional wicking core.

4. The vascular biomimetic directed wicking core of claim 3, wherein, The application relates to a plant vascular bundle biomimetic directional wicking core.

5. The plant vasculature biomimetic oriented wicking core according to any one of claims 1 to 4, wherein, The application relates to a plant vascular bundle biomimetic directional wicking core.

6. The plant vasculature biomimetic oriented wicking core according to any one of claims 1 to 4, wherein, The application relates to a plant vascular bundle biomimetic directional wicking core.

7. The plant vasculature biomimetic oriented wicking core according to any one of claims 1 to 4, wherein, The application relates to a plant vascular bundle biomimetic directional wicking core.

8. A method for manufacturing a biomimetic directional sap-absorbing core for plant vascular bundles, characterized in that, The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core.

9. The method of claim 8, wherein the plant vasculature biomimetic directional wicking core is manufactured by, The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core.

10. The method of claim 8, wherein the plant vasculature biomimetic directional wicking core is manufactured by, The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. 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The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core. The application relates to a plant vascular bundle biomimetic directional wicking core.

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