TWI746010B - Heat pipe and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a heat pipe and a manufacturing method thereof. The heat pipe mainly includes a hollow tube body, a capillary tube, and a working fluid; the working fluid and the capillary tube are accommodated in a closed chamber of the hollow tube body, and the capillary sleeve The tube surrounds the inner wall of the hollow tube body. Wherein, the capillary sleeve includes a woven mesh, which generates a radial tension and is autonomously attached to the inner wall surface of the hollow tube body. According to this, the present invention uses the woven mesh as the capillary structure, and fully utilizes the self-supporting tension to achieve the self-supporting effect, so that the capillary structure is completely attached to the inner tube wall, and no matter how the hollow tube body is bent or deformed, the woven mesh is always It can completely and smoothly adhere to the inner pipe wall, maintain excellent drainage capacity, and significantly increase the heat dissipation power.

Description

Heat pipe and manufacturing method thereof

The invention relates to a heat pipe and a manufacturing method thereof, in particular to a heat pipe capable of providing high heat dissipation power and a manufacturing method thereof.

Generally, electronic devices or mechanical equipment generate high temperatures during operation, and heat pipes are commonly used to transfer and dissipate heat. The operating principle of heat pipes uses the evaporation and condensation of the internal working fluid to achieve rapid temperature uniformity. To further explain, after the heat pipe absorbs heat at the high temperature end, the internal working fluid evaporates and moves to the low temperature zone under the influence of the vapor pressure. In the low temperature zone, the working fluid vapor dissipates heat and condenses into a liquid, and then flows back to the high temperature zone through the internal capillary structure. , To absorb heat and evaporate, so as to continuously circulate and dissipate heat.

However, the water storage capacity and drainage capacity of the capillary structure are very important factors that affect the heat dissipation power of the entire heat pipe. Common capillary structures used in general heat pipes include Groove, Mesh Heat Pipe or Fiber Heat Pipe, and Sintered Power, which are compared to grooved and powder sintered In terms of formula, the water storage and drainage capacity of the braided pipe is quite excellent. However, the technology of using mesh and braided tube as the capillary structure has been developed so far, and there are still many defects and limitations, and it is still an urgent improvement project in the industry.

To further explain, the traditional manufacturing method using metal mesh or woven mesh as the capillary structure, please refer to my country Invention Patent Publication No. I295364 "Metal Mesh Heat Pipe Sintering Method and Device"; the manufacturing method of the prior art is briefly described as follows: First, the metal The mesh is implanted in the copper tube; then, the mandrel is inserted into the metal mesh to make the metal mesh and the inner wall of the copper tube close; then, the copper tube and the metal mesh are heated to sinter the metal mesh and the inner wall of the copper tube; finally, the metal mesh is moved In addition to the heart stick. However, although this traditional sintering method can effectively bond and fix the metal mesh to the inner wall of the copper pipe, the porosity of the metal mesh after sintering will be greatly reduced, and it will significantly affect the water storage and drainage capacity of the metal mesh.

On the other hand, the prior art has also developed a technology that uses an additional support structure to spread the copper mesh so that the copper mesh is closely attached to the inner wall of the metal pipe; please refer to my country Patent Publication No. I558968 "A Heat Pipe", which It is disclosed that an elastic member located in the metal mesh is used, and the elastic member is in an elastic compression state, so that a radially outward elastic force can be applied to the metal mesh to make the metal mesh closely adhere to the inner wall of the metal tube.

However, this prior art uses a coil spring as an elastic member. Although this can fix the metal mesh in the metal tube, it still cannot make the metal mesh completely adhere to the inner wall of the metal tube, especially those that do not touch the coil spring. In places, the metal mesh may bulge, which will significantly affect the heat dissipation capacity. Moreover, the manufacturing process of this configuration is complicated and the yield rate is not high. Because the diameter of the general metal mesh is small, it is not easy to pass the coil spring through the metal mesh, and the coil spring must evenly spread the metal. The net is even more difficult.

The main purpose of the present invention is to provide a heat pipe and a manufacturing method thereof, so that a woven mesh can be used as a capillary structure without additional supporting members. It is not fixed by sintering, and fully utilizes the tension of the braided mesh itself to achieve a self-supporting effect, so that the capillary structure is completely attached to the inner tube wall, and no matter how the outer tube is bent or deformed, the braided mesh is always complete And smoothly close to the inner pipe wall, maintain excellent water storage and drainage capacity, and then significantly improve the heat dissipation power.

To achieve the above object, the heat pipe of the present invention mainly includes a hollow tube body, a capillary tube, and a working fluid; the hollow tube body includes a closed chamber, and the capillary tube is arranged in the closed chamber, and at least It partially surrounds the inner wall surface of the hollow tube body; the working fluid is contained in the closed chamber. Wherein, the capillary sleeve includes at least one woven mesh, which generates a radial tension and is autonomously attached to the inner wall surface of the hollow tube body.

As mentioned above, the capillary sleeve of the present invention adopts a woven mesh, and the woven mesh itself has a large number of voids and can accommodate a large amount of condensed water, so it has high heat transfer and heat dissipation efficiency, and can be flexibly increased or decreased according to actual needs. The number of meshes has the advantage of flexible design. In addition, the woven mesh of the present invention has the characteristics of radial rebound, so it is convenient to penetrate the hollow tube body and has the convenience of the manufacturing process. In addition, the radial tension generated by the woven mesh of the present invention allows the woven mesh to completely and flatly contact the inner wall of the hollow tube body, providing an excellent heat exchange mechanism, so there is no need for the sintering process of the traditional metal mesh heat pipe Or add additional support structure to form a self-supporting woven wire mesh (self-supporting woven wire mesh) capillary structure, no matter how the hollow tube body is bent or deformed, the self-supporting woven wire mesh of the present invention is always tightly attached to the inner tube Wall, it can maintain excellent water storage and drainage capacity, especially suitable for high-power heat sinks.

Preferably, the at least one woven mesh of the present invention can be woven from at least one first metal wire and at least one second metal wire, and at least one first metal wire The radial elastic coefficient of the belonging wire may be greater than the radial elastic coefficient of the at least one second metal wire. In other words, the first metal wire with a larger radial elastic modulus can provide greater radial tension; on the other hand, the second metal wire with a smaller radial elastic modulus can provide a greater radial deformation rate. Accordingly, the present invention can be used with metal wires with different radial elastic coefficients to allow the capillary tube to simultaneously have the characteristics of radial deformation and rebound, and generate sufficient radial tension.

Furthermore, the at least one woven mesh of the present invention can be woven by a plurality of metal wire bundles by plain weave or twill weave, and each metal wire bundle can be composed of at least one first metal wire and at least one second metal wire. That is, each metal wire bundle is provided with a first metal wire and a second metal wire at the same time, and the woven mesh woven in this way can obtain a fairly uniform radial support force and a radial deformation rate.

On the other hand, the at least one woven mesh of the present invention may also be woven by a plurality of warp yarn bundles and a plurality of weft yarn bundles by plain weaving or twill weaving, and the plural warp yarn bundles may be composed of at least one first metal wire, and plural weft yarns The bundle can be composed of the at least one second metal wire. In other words, the warp bundle can provide sufficient radial support, while the weft bundle can provide an appropriate radial deformation rate; the woven mesh woven in this way can also obtain a fairly uniform radial support and radial support. The deformation rate is sufficient to allow the capillary tube to be completely attached to the inner wall of the hollow tube body.

In addition, the capillary sleeve of the present invention may include a first woven mesh and a second woven mesh, and the second woven mesh may be between the first woven mesh and the inner wall surface of the hollow tube; wherein, the first woven mesh The mesh can be composed of at least one first metal wire, and the second woven mesh can be composed of at least one second metal wire. In other words, the capillary tube of the present invention may include multiple layers of woven mesh, except In addition to doubling the drainage, the woven mesh closer to the inner layer can be woven by the first metal wire with a larger radial elastic coefficient, which can provide sufficient radial tension to push against the woven mesh of the outer layer to ensure All woven meshes can be completely and flatly attached to the inner wall of the hollow sleeve.

In addition, the woven mesh of the capillary tube can also be woven from a plurality of metal wires; and at the two end portions of the capillary tube, the overlapping metal wires can be joined to each other. Accordingly, by joining the metal wires adjacent to each other and overlapping at the ends, the radial tension can be greatly increased, and the radial deformation rate and the axial deformation rate can also be significantly increased. In addition, the wire diameter range of at least one woven mesh of the present invention may be between 0.02 mm and 0.2 mm; and the porosity of at least one woven mesh may be between 25% and 75%. Among them, the wire diameter of the woven mesh will not only affect the amount of deformation, but also affect the size of the radial tension; in addition, the void ratio of the woven mesh will also affect the amount of deformation, as well as the amount of drainage, that is, Heat removal efficiency.

In order to achieve the above object, a method of manufacturing a heat pipe of the present invention includes the following steps: first, a hollow tube body and a capillary sleeve are provided; and the capillary sleeve includes at least one woven mesh; then, the capillary sleeve is inserted into the The hollow tube body, and the capillary sleeve provides a radial tension tension, and autonomously attaches to the inner wall surface of the hollow tube body; finally, the hollow tube body is filled with a working fluid and degassed, and then the hollow tube body is closed To form a closed chamber.

In summary, the manufacturing method provided by the present invention is quite simple. The more special feature is that the capillary sleeve is inserted into the hollow tube body, and the capillary sleeve can be stretched with the help of the radial tension of the capillary sleeve itself. It is autonomously fixed inside the hollow tube body, and completely contacts and adheres to the inner wall surface of the hollow tube body. Accordingly, the innovative manufacturing method of the present invention can eliminate the need for sintering compared with the traditional manufacturing method of metal mesh heat pipes. The step of metal mesh, or the step of installing additional supporting devices, can significantly improve the manufacturing efficiency, and the manufacturing cost can be significantly reduced.

Preferably, the original tube diameter of the capillary tube can be greater than or equal to the inner diameter of the hollow tube; and in the step of penetrating the capillary tube, the capillary tube can be stretched axially to make the tube diameter smaller than the middle diameter. The inner diameter of the hollow tube body, and the capillary sleeve is loosened after penetrating the hollow tube body. In other words, with the help of the elastic deformation characteristics of the capillary sleeve, the capillary sleeve can be stretched to reduce the diameter of the capillary tube to facilitate penetration into the hollow tube body. The tube naturally rebounds and expands and abuts against the inner wall of the hollow tube body, thereby generating radial tension tension, so that the capillary sleeve is tightly fixed on the inner wall of the hollow tube body.

On the other hand, in the heat pipe manufacturing method provided by the present invention, the capillary tube may include a first braided mesh, a core tube, and a second braided mesh, and the second braided mesh can be sleeved on the core tube, The first woven mesh can be accommodated in the core tube; and the first woven mesh can be composed of a plurality of first metal wires, and the second woven mesh can be composed of a plurality of second metal wires. However, in the step of penetrating the capillary tube, the first braided mesh, core tube, and second braided mesh are inserted into the hollow tube body and then the core tube is removed, and the first braided mesh and second braided mesh are removed. The mesh is separated from the core tube and fixed in the hollow tube; wherein the radial expansion ratio of the first braided mesh after being separated from the core tube exceeds 110%.

That is to say, in the manufacturing method provided by the present invention, the capillary tube can adopt multi-layer braided mesh, and the core tube is used to fix the braided mesh, which can be separately arranged inside and outside the core tube; It is set to provide a first braided mesh that can provide greater radial tension, and a second braided mesh is sheathed outside the core tube. However, in the manufacturing step, after the entire capillary tube with the core tube is inserted into the hollow tube body, the core tube is simply pulled out. At this time, the first braided mesh will be separated from the bundle of the core tube. It naturally rebounds and expands and generates radial tension, and the second woven net is supported on the inner wall surface of the hollow tube body.

1: Heat pipe

2: Hollow tube body

3: Capillary tube

20: closed chamber

30: Metal wire harness

31: The first metal wire

32: The second metal wire

33: The first woven mesh

34: The second woven mesh

35: core tube

301: Warp Harness

302: Weft harness

310: Junction

Di: penetration direction

Do: Exit direction

FIG. 1A is a schematic diagram of a radial cross-section of the first embodiment of the heat pipe of the present invention.

Fig. 1B is a partial enlarged schematic view of the woven mesh of the first embodiment of the present invention.

Fig. 2 is a partial enlarged schematic view of the woven mesh of the second embodiment of the present invention.

Fig. 3 is a partial enlarged schematic diagram of the woven mesh of the third embodiment of the present invention.

4A is a schematic diagram of a radial cross-section of the fourth embodiment of the present invention.

Fig. 4B is an enlarged schematic view of another type of the first woven mesh in the fourth embodiment of the present invention.

5A and 5B respectively show partial cross-sectional schematic diagrams of the hollow sleeve during the process of installing the capillary sleeve in the manufacturing method of the present invention.

6A and 6B respectively show the axial cross-sectional schematic diagram of the capillary tube installed in another manufacturing method of the present invention.

Before the heat pipe and its manufacturing method of the present invention are described in detail in this embodiment, it should be particularly noted that in the following description, similar components will be represented by the same component symbols. Furthermore, the drawings of the present invention are only for illustrative purposes, and they are not necessarily drawn to scale, and all details are not necessarily presented in the drawings.

Please refer to FIGS. 1A and 1B first. FIG. 1A is a schematic diagram of a radial cross-section of a first embodiment of a heat pipe of the present invention, and FIG. 1B is a partial enlarged schematic view of a woven mesh of the first embodiment of the present invention. As shown in the figure, the heat pipe 1 of this embodiment mainly includes a hollow tube body 2, a capillary sleeve 3, and a working fluid (not shown in the figure). The hollow tube body 2 includes a closed chamber 20, and the capillary sleeve The tube 3 is arranged in the closed chamber 20 and surrounds the entire inner wall surface of the hollow tube body 2 as a capillary structure for condensation The subsequent working fluid flows back; and the working fluid is also contained in the closed chamber 20.

To further illustrate, the capillary sleeve 3 of this embodiment is composed of four layers of woven meshes stacked, and each woven mesh is woven by a plurality of metal wire bundles 30 by a plain weave method, and each metal wire bundle 30 includes a first metal wire. The wire 31 and the four second metal wires 32 are formed side by side. In addition, the first metal wire 31 and the second metal wire 32 of this embodiment are made of different materials, and the radial elastic modulus of the first metal wire 31 is greater than the radial elastic modulus of the second metal wire 32, and the diameter of the two The coefficient of elasticity in the direction should preferably ^{exceed 1000kgf/mm 2.}

To further illustrate, the first metal wire 31 with a larger radial elastic coefficient can provide a larger radial tension, while the second metal wire 32 with a smaller radial elastic coefficient can provide a larger radial deformation margin. It also has better thermal conductivity. In this embodiment, the first metal wire 31 can be a hard steel wire, a piano wire, or a stainless steel wire, and the wire diameter is preferably between 0.02mm and 0.2mm; however, this embodiment mainly adopts a wire diameter of 0.1mm. Under this wire diameter condition, the radial elastic coefficient of hard steel wire and piano wire is 8×10 ³ kgf/mm ² , and the radial elastic coefficient of SUS631 stainless steel wire is 7.5×10 ³ kgf/mm ² .

In addition, the second metal wire 32 can be selected from beryllium copper wire, phosphor bronze wire, nickel silver copper wire, or brass wire. Under the condition of the same wire diameter of 0.1mm, the radial elasticity coefficient of the beryllium copper wire is 4.5×10 ³ kgf/mm ² , the radial elastic coefficient of phosphor bronze wire is 4.3×10 ³ kgf/mm ² , and the radial elastic coefficient of nickel silver and brass wire is 4×10 ³ kgf/mm ² . Accordingly, in this embodiment, by matching metal wires with different radial elastic coefficients, the capillary sleeve 3 has the characteristics of radial deformation and rebound at the same time, and generates sufficient radial tension to achieve self-supporting (self-supporting). supporting), and more importantly, it can maintain good heat transfer capacity and drainage capacity.

On the other hand, in order to take into account the deformation in the radial and axial directions, the porosity of each woven mesh should not be too high or too low, preferably between 25% and 75%, for example, the mesh number is 40 The mesh size can be between 200 meshes; among them, if the porosity is too high, the drainage efficiency will be affected, but if the porosity is too low, the woven mesh will be difficult to deform or recover. In addition, overall, the radial deformation rate of this embodiment can exceed 5%; that is, when each woven mesh is compressed or stretched, the deformation margin of the radial cross-sectional area can exceed ±5%.

Furthermore, it needs to be specifically explained that, as shown in FIG. 1A, in order to improve the water storage capacity, the stacked mesh systems are arranged in a staggered manner, that is, the metal wire bundles of the next layer of meshes are arranged between the gaps of the metal wire bundles. Moreover, it is even better that different layers of woven mesh can be woven with different weaving methods. For example, the first layer is a woven mesh woven by plain weave, and the second layer is woven by twill weave. The meshes, stacked in this way, can greatly reduce the size of the gaps between the layers, thereby greatly improving the water storage and drainage efficiency of the entire capillary tube 3.

Next, please refer to FIG. 2, which is a partially enlarged schematic diagram of the woven mesh of the second embodiment of the present invention. The main difference between this embodiment and the foregoing first embodiment is that the composition of the metal wire bundle of the woven mesh is different. In this embodiment, as shown in the figure, the woven mesh is woven by a plurality of warp strands 301 and a plurality of weft strands 302 by a plain weave method; wherein, each warp strand 301 is composed of 5 first metal wires 31 Each weft wire bundle 302 is also composed of 5 second metal wires 32. As in the first embodiment, the radial elastic modulus of the first metal wire 31 is greater than the radial elastic modulus of the second metal wire 32. Accordingly, with this configuration, the warp harness 301 formed by the first metal wire 31 can provide sufficient radial tension, and the weft harness 302 formed by the second metal wire 32 can provide a larger margin in the radial direction. Deformed quantity.

Also, please refer to FIG. 3, which is a partially enlarged schematic diagram of the woven mesh of the third embodiment of the present invention. The main difference between this embodiment and the previous embodiments is that the woven mesh of this embodiment is mainly woven with a plurality of metal wire bundles 30 and woven by a plain weave method, and each metal wire bundle 30 is composed of a second metal wire 32 only. In addition, the first metal wire 31 is inserted in the middle of the mesh, that is, the first metal wire 31 is woven into the plain weave mesh originally composed of the second metal wire 32 in a manner of radially surrounding the inner wall of the hollow tube body 2. To put it more simply, the first metal wire 31 is configured as a hoop-like member, which can provide excellent radial tension, and tightly fix the entire capillary sleeve 3 on the inner wall of the hollow tube body. The first metal wire 31 of the hoop cuts each hollow mesh of the plain weave, so the drainage capacity of the capillary sleeve 3 can be further improved.

Please refer to FIG. 4A, which is a schematic diagram of a radial cross-section of a fourth embodiment of the present invention. In this embodiment, a multi-layer mesh structure is also adopted, including a first layer of woven mesh 33 and three layers of second woven mesh 34. The first woven mesh 33 is woven by the first metal wire 31, and the second woven mesh The mesh 34 is woven by the second metal wire 32; moreover, the three-layer second woven mesh 34 is laminated between the first woven mesh 33 and the inner wall surface of the hollow pipe body 2. Accordingly, in this embodiment, the first braided mesh 33 closer to the axis of the closed chamber 20 is braided by the first metal wire 31 with a larger radial elastic coefficient, thereby providing sufficient radial expansion. Tension is used to push against the second woven mesh 34 woven by the second metal wire 32 in the outer layer to ensure that all the woven meshes can be completely and flatly attached to the inner wall surface of the hollow sleeve 2.

In addition, please refer to FIG. 4B, which is an enlarged schematic view of another type of first woven mesh in the fourth embodiment of the present invention. As shown in the figure, the actual The main difference between the first woven mesh 33 of the embodiment type and the first woven mesh 33 shown in FIG. 4A is that each wire harness unit of this embodiment is woven by a single metal wire, and is At the end of the first woven mesh 33, in this embodiment, the first metal wires 31 that are adjacent to each other and overlap each other are welded to form a joint 310. Accordingly, through this configuration, the radial support force of the woven mesh formed by the first metal wires 31 can be increased by more than one time, and the number of the first metal wires 31 can be reduced. However, it needs to be specially clarified that the first woven mesh 33 of this embodiment is not limited to the weaving of a single first metal wire 31, and can also be formed by weaving a plurality of first metal wires 31 as in the previous embodiment. Provides better radial tension and drainage capacity. In addition, the present invention may not be limited to only end welding, and each intersection of overlapping braids may be welded to become a joint, thereby greatly improving the radial support force.

The following describes the manufacturing method of the present invention, please refer to FIGS. 5A and 5B at the same time, which respectively show partial cross-sectional schematic diagrams of the hollow sleeve during the process of installing the capillary sleeve in the manufacturing method of the present invention. As shown in FIG. 5A, first, a hollow tube 2 and a capillary sleeve 3 are provided. The capillary sleeve 3 can be any of the foregoing embodiments, and the original tube diameter of the capillary sleeve 3 is greater than or equal to The inner diameter of the hollow tube body 2. Then, apply force to the two ends of the capillary sleeve 3 to axially stretch so that the diameter of the capillary sleeve 3 is smaller than the inner diameter of the hollow tube body 2, and after penetrating the hollow tube body 2 and positioning, cancel the shaft Apply force to loosen the capillary sleeve 3.

However, because the capillary sleeve 3 of this embodiment has the characteristic of rebounding after radial compression, when the axial tension force is cancelled, the capillary sleeve will rebound to the original diameter, and the capillary sleeve 3 will rebound. The deformation rate of the radial cross-sectional area compared to the stretched state may exceed 5%, preferably more than 30%. In addition, as described in the foregoing embodiment, the original diameter of the capillary sleeve 3 is greater than the inner diameter of the hollow tube body 2, so when the capillary sleeve When the tube 3 is in the hollow tube body 2, the capillary sleeve 3 will generate a radial tension tension and tightly adhere to the inner wall surface of the hollow tube body 2, as shown in FIG. 5B.

Finally, after injecting a working fluid into the hollow tube body 2 and degassing, the two ends of the hollow tube body 2 are sealed to form a closed chamber 20; that is, for example, heating or vacuum suction or a combination of these After degassing by means such as riveting, welding, or diffusion bonding, the through holes at both ends of the hollow tube body 2 are closed to form a closed chamber 20, which completes the heat pipe device of the present invention.

Based on the above, the heat pipe manufacturing method provided by the present invention is quite simple. Of course, it must be matched with the capillary tube 3 mentioned in the foregoing embodiment, that is, with the help of the elastic deformation characteristics of the capillary tube 3, force is applied to stretch the capillary first. The tube diameter of the sleeve 3 is reduced to facilitate penetration into the hollow tube body 2; then, after the insertion and positioning, the stretching force is immediately cancelled, allowing the capillary sleeve 3 to naturally rebound and expand the overall tube diameter. This also generates radial tension, so that the capillary sleeve 3 is tightly and completely fixed on the inner wall of the hollow tube body.

In addition, the present invention provides another manufacturing method, which is particularly suitable for the heat pipe device of the foregoing fourth embodiment. For further explanation, please refer to FIG. 6A and FIG. 6B together, which show an axial cross-sectional view of the capillary tube installed in another manufacturing method of the present invention. The special feature of this manufacturing method is that the pre-prepared capillary sleeve 3 includes a three-layer structure of the first braided mesh 33, the core tube 35, and the second braided mesh 34, that is, the second braid with a smaller radial elastic coefficient The mesh 34 is sleeved on the core tube 35, and the first braided mesh 33 with a larger radial elastic coefficient is preliminarily accommodated in the core tube 35. Moreover, the outer diameter of the entire capillary sleeve 3 is smaller than the inner diameter of the hollow tube body 2 to facilitate penetration into the hollow tube body 2.

However, when the capillary sleeve 3 is to be inserted into the hollow tube body 2, the entire capillary sleeve 3 includes the first braided mesh 33, the core tube 35, and the second braided mesh The mesh 34 directly penetrates the hollow tube body 2 in a penetration direction Di, as shown in FIG. 6A. After threading and positioning, then, first fix one end of the first woven mesh 33 and the second woven mesh 34, especially one end of the threading direction Di, and directly pull out the core tube 35 in an exit direction Do to allow the first woven mesh 33 releases the restraint of the core tube 35, automatically expands the second woven mesh 34, and generates radial tension to support the second woven mesh 34 on the inner wall of the hollow tube body 2, as shown in FIG. 6B. In this embodiment, the radial expansion ratio of the first woven mesh 33 after being separated from the core tube 35 exceeds 110%, preferably more than 130%; that is, the first woven mesh 33 is separated from the core tube 35 After being bound, the radial cross-sectional area of the first braided mesh 33 has expanded by more than 10% compared to when in the core tube 35.

In addition, although the above-mentioned manufacturing method takes the first woven mesh 33 and the second woven mesh 34 provided inside and outside the core tube 35 as an example, the present invention is not limited to this, and the first woven mesh may also be used as an example. 33, and the second braided mesh 34 are all arranged in the core tube 35. In addition, the configuration of this capillary sleeve 3 can also be applied to the aforementioned manufacturing method, that is, while applying force to stretch the first woven mesh 33 and the second woven mesh 34 and separate from the core tube 35, and make the outer diameters of the two It is smaller than the inner diameter of the hollow tube body 2 and penetrates into the hollow tube body 2 on one side.

The above-mentioned embodiments are merely examples for the convenience of description, and the scope of rights claimed in the present invention should be subject to the scope of the patent application, rather than being limited to the above-mentioned embodiments.

1: Heat pipe

2: Hollow tube body

3: Capillary tube

20: closed chamber

31: The first metal wire

32: The second metal wire

Claims (8)

A heat pipe comprising: a hollow tube body including a closed chamber; a capillary tube arranged in the closed chamber and at least partially surrounding the inner wall surface of the hollow tube body; and a The working fluid is contained in the enclosed chamber; it is characterized in that: the capillary sleeve includes at least one woven mesh, which generates a radial tension and is autonomously attached to the inner wall surface of the hollow tube; wherein, The at least one woven mesh is woven from at least one first metal wire and at least one second metal wire of different materials with the same wire diameter, and the radial elastic modulus of the at least one first metal wire is greater than that of the at least one second metal wire. The radial elastic coefficient of the metal wire. Such as the heat pipe of claim 1, wherein the at least one woven mesh is woven by a plurality of metal wire bundles by plain weave or twill weave, and each metal wire bundle is formed by the at least one first metal wire and the at least one first metal wire Two metal wires. The heat pipe of claim 1, wherein the at least one woven mesh is woven by a plurality of warp strands and a plurality of weft strands by plain weaving or twill weaving, and the plurality of warp strands is formed by the at least one first metal wire The plurality of weft wire bundles are composed of the at least one second metal wire. The heat pipe of claim 1, wherein the metal wires that overlap each other are joined to each other at the two end portions of the capillary tube. For the heat pipe of claim 1, wherein the wire diameter range of the at least one woven mesh is between 0.02 mm and 0.2 mm; and the porosity of the at least one woven mesh is between 25% and 75%. A method for manufacturing a heat pipe includes the following steps: (A) providing a hollow tube body and a capillary tube; the capillary tube includes at least one woven mesh; (B) the capillary tube penetrates the hollow tube body , The capillary sleeve provides a radial tension and is autonomously attached to the inner wall of the hollow tube; wherein the at least one woven mesh is made of at least one first metal wire of the same wire diameter and different materials, And at least one second metal wire braided, the radial elastic coefficient of the at least one first metal wire is greater than the radial elastic coefficient of the at least one second metal wire; and (C) injecting a After the working fluid is degassed, the hollow tube body is sealed to form a closed chamber. The manufacturing method of claim 6, wherein the tube diameter of the capillary tube is greater than or equal to the inner diameter of the hollow tube; in the step (B), the capillary tube is stretched to make the tube diameter smaller than the inner diameter of the hollow tube. The inner diameter of the hollow tube body is inserted into the hollow tube body and the capillary sleeve is loosened. According to the manufacturing method of claim 6, wherein the capillary tube includes a first braided mesh, a core tube, and a second braided mesh, the second braided mesh is sleeved on the core tube, and the first braided mesh Is housed in the core tube; the first braided mesh is composed of a plurality of first metal wires, and the second braided mesh is composed of a plurality of second metal wires; in the step (B), the first After a braided mesh, the core tube, and the second braided mesh penetrate the hollow tube body, the core tube is removed, so that the first braided mesh and the second braided mesh are separated from the core tube and fixed to the core tube The hollow tube body; the radial expansion rate of the first braided mesh after being separated from the core tube exceeds 110%.

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