Heat dissipation flat tube with built-in convex strip structure
The heat dissipation flat tube with built-in convex strips addresses deformation and collapse issues in conventional heat pipes by creating non-communicating airflow spaces, enhancing structural resistance and heat dissipation efficiency while maintaining cost-effectiveness.
Patent Information
- Application Number
- TW115203600
- Authority / Receiving Office
- TW · TW
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-04-23
- Publication Date
- 2026-07-11
- Estimated Expiration
- 2036-04-22
AI Technical Summary
Conventional heat spreaders and heat pipes face issues of deformation under pressure, leading to reduced thermal conductivity and increased assembly complexity and cost, while traditional vapor chambers are prone to collapse, affecting heat dissipation efficiency.
A heat dissipation flat tube with a built-in convex strip structure, utilizing a metal flat tube body with capillary structures and convex strips to separate the vacuum chamber into non-communicating airflow spaces, enhancing structural resistance and heat dissipation efficiency.
The design achieves low-cost, structurally resistant heat dissipation with uniform heating and efficient fluid flow, preventing fluid depletion and ensuring effective heat dispersion through multiple airflow spaces.
Smart Images
Figure IMG-2_DRAW_115203600-A0305-14-0001-1 
Figure IMG-2_DRAW_115203600-A0305-14-0002-2 
Figure IMG-2_DRAW_115203600-A0305-14-0003-3
Abstract
Description
Heat dissipation flat tube with built-in convex strip structure Technical Field
[0001] This disclosure relates to a heat dissipation structure, and more particularly to a heat dissipation flat tube with a built-in convex strip structure. Prior Technology
[0002] As the requirements for performance and read speed of electronic components increase, the operating temperature of electronic components is also constantly increasing. However, high temperature will reduce the operating speed of electronic components, shorten their lifespan, or cause them to burn out. Therefore, heat dissipation structures such as heat spreaders and heat pipes are often used to thermally attach electronic components to solve the aforementioned heat dissipation problem.
[0003] Traditional heat spreaders and heat pipes mainly consist of a shell, capillary structures covering the inner surface of the shell, and working fluid filling the shell. The working fluid achieves rapid heat conduction and dissipation through vapor and liquid phase changes within the shell caused by heating and cooling, and through reflux via the capillary structures.
[0004] However, if the shells of the aforementioned vapor chambers and heat pipes collapse under pressure, reducing the space for vapor-liquid phase changes of the working fluid, it will decrease the thermal conductivity and heat dissipation efficiency of the vapor chamber and heat pipe assembly. Alternatively, to prevent the shells of the vapor chambers and heat pipes from deforming under pressure, the assembly structure may become complex, resulting in high assembly costs. Therefore, designing vapor chambers and heat pipes that are not easily deformed and are cost-effective is a key focus of this author's research and development.
[0005] In view of this, the creator has devoted himself to studying the aforementioned existing technologies and applying theoretical principles to try his best to solve the problems mentioned above, which has become the creator's goal for improvement. Summary of the Invention
[0006] This disclosure provides a heat dissipation flat tube with a built-in convex strip structure. It utilizes a first convex strip and a second convex strip inside the metal flat tube body for support. The upper half capillary structure, the lower half capillary structure, the first convex strip, and the second convex strip separate the vacuum chamber into multiple airflow spaces that are not interconnected with each other, so as to achieve the characteristics of low manufacturing cost, structural pressure resistance, and high heat dissipation efficiency of the heat dissipation flat tube disclosed herein.
[0007] In this disclosed embodiment, a heat dissipation flat tube with a built-in convex strip structure is provided, comprising: a metal flat tube body having two sealing portions formed at both ends thereon and a vacuum chamber formed therein, an upper half inner sidewall and a lower half inner sidewall, the metal flat tube body defining an axial length between the two sealing portions; a capillary structure including an upper half capillary structure disposed on the upper half inner sidewall and a lower half capillary structure disposed on the lower half inner sidewall; a working fluid contained in the vacuum chamber; and a convex strip structure including at least one first convex strip connected on one side to the upper half inner sidewall and arranged along the axial length and abutting against the lower half capillary structure on the other side, and at least one second convex strip connected on one side to the lower half inner sidewall and arranged along the axial length and abutting against the upper half capillary structure on the other side, the upper half capillary structure, the lower half capillary structure, the at least one first convex strip and the at least one second convex strip separating the vacuum chamber into a plurality of non-communicating airflow spaces.
[0008] Based on the above, the heat dissipation flat tube system disclosed herein uses a metal flat tube body of a heat pipe to replace the conventional heat spreader consisting of two tightly sealed metal shells, and adds a first convex strip and a second convex strip inside the metal flat tube body for support. This gives the heat dissipation flat tube disclosed herein advantages such as using a low-cost heat pipe process, structural pressure resistance, and resistance to collapse and deformation.
[0009] Furthermore, since the first and second convex strips are arranged along the axial length H of the metal flat tube, the upper half capillary structure, the lower half capillary structure, the first convex strip, and the second convex strip divide the vacuum chamber into multiple airflow spaces that are not interconnected. This allows the working fluid to be heated and vaporized by multiple airflow spaces, ensuring uniform heating. The working fluid, after condensing into a liquid state, then flows back to the lower half capillary structure sequentially through the upper half capillary structure, the first convex strip, and the second convex strip. The liquid working fluid can then flow back to each airflow space through the lower half capillary structure, preventing the liquid working fluid in each airflow space from being depleted or dry-burning. This achieves the advantages of the heat dissipation flat tube disclosed in this invention, which has multiple independent airflow spaces to disperse heat and allows the working fluid to flow back through the capillary structure and convex strip structure, resulting in excellent heat dissipation efficiency. Simple Explanation of the Diagram
[0010] Figure 1 is a perspective view of the first embodiment of the heat dissipation flat tube disclosed herein.
[0011] Figure 2 is a cross-sectional schematic diagram of the first embodiment of the heat dissipation flat tube disclosed herein.
[0012] Figure 3 is a cross-sectional schematic diagram of the positioning rod inserted into the metal cylindrical tube disclosed herein.
[0013] Figure 4 is a cross-sectional schematic diagram of the sintered powder filling between the positioning rod and the metal cylindrical body disclosed herein.
[0014] Figure 5 is a cross-sectional schematic diagram of the convex strip structure and sintered powder that have undergone heating process as disclosed in this paper.
[0015] Figure 6 is a cross-sectional schematic diagram of the convex strip structure disclosed herein welded to a metal circular tube.
[0016] Figure 7 is a cross-sectional schematic diagram of the sintered powder filling between the positioning rod, the raised strip structure and the metal cylindrical body disclosed herein.
[0017] Figure 8 is a cross-sectional schematic diagram of the sintered powder disclosed herein after the heating process.
[0018] Figure 9 is a cross-sectional schematic diagram of the second embodiment of the heat dissipation flat tube disclosed herein.
[0019] Figure 10 is a cross-sectional schematic diagram of the woven mesh covering the convex strip structure and the metal cylindrical body disclosed herein.
[0020] Figure 11 is a cross-sectional schematic diagram of the third embodiment of the heat dissipation flat tube disclosed herein.
[0021] Figure 12 is a cross-sectional schematic diagram of the raised strip structure and grooves on the inner wall of the metal cylindrical tube disclosed herein.
[0022] Figure 13 is a cross-sectional schematic diagram of the fourth embodiment of the heat dissipation flat tube disclosed herein.
[0023] Figure 14 is a cross-sectional schematic diagram of the fifth embodiment of the heat dissipation flat tube disclosed herein.
[0024] Figure 15 is a cross-sectional schematic diagram of the sixth embodiment of the heat dissipation flat tube disclosed herein. Implementation
[0025] In the description of this disclosure, it should be understood that the terms "front," "rear," "left," "right," "front end," "rear end," "end," "longitudinal," "lateral," "vertical," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting conditions of this disclosure.
[0026] To keep the drawings concise, each drawing only schematically represents the parts relevant to the application; these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some drawings, only one of components with the same structure or function is schematically drawn, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one."
[0027] Unless otherwise defined, terms such as "substantially" and "approximately" are used to describe and narrate small changes. When combined with an event or situation, the term may include the exact moment the event or situation occurred, or an approximate point in time. For example, when combined with a numerical value, the term may include a range of variation less than or equal to ±10% of the value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%.
[0028] The detailed description and technical content of this disclosure will be explained in conjunction with the following drawings. However, the accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure.
[0029] Please refer to Figures 1 to 5. This disclosure provides a first embodiment of a heat dissipation flat tube with a built-in convex strip structure. This heat dissipation flat tube 10 mainly includes a metal flat tube body 1, a capillary structure 2, a working fluid, and a convex strip structure 3.
[0030] As shown in Figures 1 and 2, the metal flat tube 1 is made of a metal with high thermal conductivity such as copper or aluminum. The metal flat tube 1 has two sealing portions 11 formed at both ends. Each sealing portion 11 is made by degassing and sealing, so that the interior of the metal flat tube 1 has a vacuum chamber 12 and an upper half inner wall 13 and a lower half inner wall 14 formed on the upper and lower inner walls of the vacuum chamber 12, respectively. The metal flat tube 1 defines an axial length H between the two sealing portions 11.
[0031] As shown in Figure 2, the capillary structure 2 includes an upper capillary structure 21 disposed on the upper inner wall 13 and a lower capillary structure 22 disposed on the lower inner wall 14. The working fluid is contained in the vacuum chamber 12 and undergoes vapor-liquid phase changes in the vacuum chamber 12, and achieves rapid heat conduction and heat dissipation efficiency through the return flow via the capillary structure 2.
[0032] As shown in Figures 1 and 2, the convex structure 3 includes one or more first convex strips 31 and one or more second convex strips 32. The first convex strip 31 and the second convex strip 32 are made of high thermal conductivity metals such as copper and aluminum. One side of the first convex strip 31 is connected to the upper inner wall 13 and is arranged along the axial length H, that is, the length of the first convex strip 31 is equal to the axial length H and is arranged parallel to the metal flat tube 1. The other side of the first convex strip 31 abuts against the lower capillary structure 22. One side of the second convex strip 32 is connected to the lower inner wall 14 and is arranged along the axial length H, that is, the length of the second convex strip 32 is equal to the axial length H and is arranged parallel to the metal flat tube 1. The other side of the second convex strip 32 abuts against the upper capillary structure 21. The outer surfaces 5 of the first convex strip 31 and the second convex strip 32 are provided with grooves, which can be any geometric pattern such as grid pattern or wavy pattern.
[0033] In addition, the number of one of the first protrusions 31 and the number of the other is N or N+1, where N is a positive integer. The first protrusions 31 and the second protrusions 32 are arranged alternately, that is, when there are multiple first protrusions 31, they are not arranged adjacently, and when there are multiple second protrusions 32, they are not arranged adjacently either, as shown in Figure 2. In this embodiment, the number of first protrusions 31 is one, and the number of second protrusions 32 is two, but this is not a limitation. The first protrusions 31 are arranged between the two second protrusions 32.
[0034] Furthermore, the upper capillary structure 21, the lower capillary structure 22, the first ridge 31, and the second ridge 32 divide the vacuum chamber 12 into multiple airflow spaces 121 that are not interconnected. The first ridge 31 and the second ridge 32 are arranged alternately. Therefore, the airflow space 121 located in the middle is surrounded by the first ridge 31 and the second ridge 32 adjacent to the left and right, as well as the upper capillary structure 21 and the lower capillary structure 22 that are opposite to each other. The airflow spaces 121 located on both sides are surrounded by the first ridge 31 or the second ridge 32 arranged on one side, as well as the upper capillary structure 21 and the lower capillary structure 22 that are opposite to each other.
[0035] Furthermore, the manufacturing method of the heat dissipation flat tube 10 in this embodiment is as follows: First, as shown in Figure 3, a metal cylindrical tube 4 and a positioning rod 100 are provided. The positioning rod 100 has a plurality of recesses 101 along the axial direction on its outer periphery, which are shaped to fit the first protrusion 31 and the second protrusion 32. The positioning rod 100 is inserted into the metal cylindrical tube 4, and the first protrusion 31 and the second protrusion 32 are respectively embedded in each recess 101, so that the side of the first protrusion 31 and the second protrusion 32 away from the recess 101 is attached to the inner wall of the metal cylindrical tube 4. Solder is applied between the first protrusion 31, the second protrusion 32 and the metal cylindrical tube 4.
[0036] Second, as shown in Figure 4, there is a gap between the metal tube 4 and the positioning rod 100 for filling the sintering powder 23, so that the sintering powder 23 is filled in the inner periphery of the metal tube 4. Since the outer surfaces 5 of the first protrusion 31 and the second protrusion 32 are attached to the inner wall of the recess 101, the sintering powder 23 only covers the bottom ends of the first protrusion 31 and the second protrusion 32. Finally, the metal tube 4, the positioning rod 100, the first protrusion 31, the second protrusion 32 and the sintering powder 23 are sent into the heating furnace for heating.
[0037] Third, as shown in Figure 5, after the metal tube 4, the first protrusion 31, the second protrusion 32 and the sintered powder 23 are heated, the first protrusion 31 and the second protrusion 32 are welded to the inner periphery of the metal tube 4, and the sintered powder 23 forms a capillary structure 2 covering the inner periphery of the metal tube 4 and the bottom ends of both sides of the first protrusion 31 and the second protrusion 32. That is, the welding of the first protrusion 31 and the second protrusion 32 and the capillary structure 2 are completed in the same step.
[0038] Fourth, as shown in Figures 5 and 2, the metal cylindrical tube 4 is flattened to form the metal flat tube 1, that is, the metal flat tube 1 is made by the deformation of the metal cylindrical tube 4 under pressure, so that the first protrusion 31 of this embodiment is welded to the upper half inner wall 13, the second protrusion 32 is welded to the lower half inner wall 14, and the capillary structure 2 is sintered powder 23. The upper half capillary structure 21 is only covered on the upper half inner wall 13 and the bottom ends of the first protrusion 31 on both sides, and the lower half capillary structure 22 is only covered on the lower half inner wall 14 and the bottom ends of the second protrusion 32 on both sides. At the same time, the first protrusion 31 moves down to its end and attaches to the lower half capillary structure 22 as the metal flat tube 1 deforms, and the second protrusion 32 moves up to its end and attaches to the upper half capillary structure 21 as the metal flat tube 1 deforms.
[0039] Fifth, as shown in Figure 1, the two ends of the metal flat tube 1 are degassed and sealed to form a double-sealed section 11, and a vacuum chamber 12 is formed inside the metal flat tube 1. The manufacturing method of the aforementioned heat dissipation flat tube 10 is mainly the manufacturing method of a heat pipe, but increasing the radial length of the metal flat tube 1 can expand the volume of the vacuum chamber 12, allowing the vacuum chamber 12 to achieve an internal space similar to a vapor chamber.
[0040] Therefore, the heat dissipation flat tube 10 disclosed herein uses a metal flat tube body 1 of a heat pipe instead of the conventional vapor chamber plate which consists of two tightly sealed metal shells. This simplifies the heat pipe process and eliminates the complex vapor chamber plate manufacturing process, thus achieving the effects of simplifying the structure, reducing assembly procedures, and lowering costs. However, the metal flat tube body 1, which increases the volume of the vacuum chamber 12, is prone to collapse under pressure. Therefore, a first protrusion 31 and a second protrusion 32 are added inside the metal flat tube body 1 by welding for support. This gives the heat dissipation flat tube 10 disclosed herein advantages such as using a low-cost heat pipe process, structural pressure resistance, and resistance to collapse and deformation.
[0041] Furthermore, since the first convex strip 31 and the second convex strip 32 are arranged along the axial length H of the metal flat tube 1, the upper half capillary structure 21, the lower half capillary structure 22, the first convex strip 31, and the second convex strip 32 divide the vacuum chamber 12 into multiple non-communicating airflow spaces 121. The outer surfaces 5 of the first convex strip 31 and the second convex strip 32 are grooved, allowing the working fluid to be heated and vaporized by multiple airflow spaces 121 for uniform heating. The condensed working fluid then sequentially passes through the upper half capillary structure 21. The grooves on the outer surfaces 5 of the first convex strip 31 and the second convex strip 32 flow back to the lower capillary structure 22. The liquid working fluid can then flow through the lower capillary structure 22 to each airflow space 121, preventing the liquid working fluid in each airflow space 121 from being exhausted or dry-burning. This achieves the advantages of the heat dissipation flat tube 10 disclosed herein having multiple independent airflow spaces 121 to disperse heat and the working fluid flowing back through the capillary structure 2 and the convex strip structure 3, thus giving the heat dissipation flat tube 10 disclosed herein excellent heat dissipation efficiency.
[0042] As shown in Figures 6 to 9, this is the second embodiment of the heat dissipation flat tube 10 disclosed herein. The embodiments in Figures 6 to 9 are generally the same as those in Figures 1 to 5. The difference between the embodiments in Figures 6 to 9 and those in Figures 1 to 5 is that the first protrusion 31 and the second protrusion 32 are welded together first, and the capillary structure 2 is then fabricated.
[0043] The manufacturing method of the heat dissipation flat tube 10 in this embodiment is different from that in the embodiments shown in Figures 1 to 5. First, as shown in Figure 6, a metal round tube 4, a first protrusion 31 and a second protrusion 32 are provided, and the first protrusion 31 and the second protrusion 32 are welded to the inner periphery of the metal round tube 4.
[0044] Second, as shown in Figure 7, a positioning rod 100 is provided. The positioning rod 100 has a plurality of recesses 101 along the axial direction on its outer periphery, which are shaped to fit the first protrusion 31 and the second protrusion 32. The positioning rod 100 is inserted into the metal cylindrical body 4. The plurality of recesses 101 are opposite to the first protrusion 31 and the second protrusion 32. There are gaps between the metal cylindrical body 4, the first protrusion 31, the second protrusion 32 and the positioning rod 100 for filling the sintering powder 23. Finally, the metal cylindrical body 4, the positioning rod 100 and the sintering powder 23 are sent together into the heating furnace for heating.
[0045] Third, as shown in Figure 8, after the metal tube 4 and the sintered powder 23 are heated, the sintered powder 23 forms a capillary structure 2 covering the inner periphery of the metal tube 4 and the outer surfaces 5 of the first protrusion 31 and the second protrusion 32.
[0046] Fourth, as shown in Figure 9, the metal cylindrical tube 4 is flattened to form a metal flat tube 1, so that the first protrusion 31 of this embodiment is welded to the upper half of the inner wall 13, and the second protrusion 32 is welded to the lower half of the inner wall 14. The capillary structure 2 is sintered powder 23. The upper half of the capillary structure 21 is covered on the upper half of the inner wall 13 and the outer surface 5 of the first protrusion 31, and the lower half of the capillary structure 22 is covered on the lower half of the inner wall 14 and the outer surface 5 of the second protrusion 32. At the same time, the first protrusion 31 moves down to its end as the metal flat tube 1 deforms. The upper half of the capillary structure 21 is attached to the lower half of the capillary structure 22, so that part of the upper half of the capillary structure 21 is sandwiched between the first protrusion 31 and the lower half of the capillary structure 22. That is, two layers of sintered powder 23 are sandwiched between the first protrusion 31 and the lower half of the inner wall 14. The second protrusion 32 moves upward with the deformation of the metal flat tube 1 and is attached to the upper half of the capillary structure 21 at its end, so that part of the lower half of the capillary structure 22 is sandwiched between the second protrusion 32 and the upper half of the capillary structure 21. That is, two layers of sintered powder 23 are sandwiched between the second protrusion 32 and the upper half of the inner wall 13.
[0047] In this way, when the working fluid is heated and vaporized, it can be separated and heated evenly by multiple airflow spaces 121. The working fluid condenses into a liquid state and then flows back to the lower half capillary structure 22 covered on the lower half inner wall 14 through the upper half capillary structure 21 covering the upper half inner wall 13, the upper half capillary structure 21 covering the first protrusion 31, and the lower half capillary structure 22 covering the second protrusion 32. The liquid working fluid can then flow to each airflow space 121 through the lower half capillary structure 22, thus preventing the liquid working fluid in each airflow space 121 from being exhausted or dry-burning, thereby achieving the same effect as the embodiments in Figures 1 to 5.
[0048] As shown in Figures 10 and 11, this is the third embodiment of the heat dissipation flat tube 10 disclosed herein. The embodiments in Figures 10 and 11 are largely the same as those in Figures 6 to 9. The difference between the embodiments in Figures 10 and 11 and those in Figures 6 to 9 is that the capillary structure 2 is a woven mesh 24.
[0049] Further explanation is as follows: The manufacturing method of the heat dissipation flat tube 10 in this embodiment differs from that in the embodiments shown in Figures 6 to 9. As shown in Figure 10, after the first protrusion 31 and the second protrusion 32 are welded to the inner periphery of the metal round tube 4, a braided mesh 24 is provided, so that the braided mesh 24 covers the inner periphery of the metal round tube 4 and the outer surfaces 5 of the first protrusion 31 and the second protrusion 32 to form a capillary structure 2.
[0050] As shown in Figure 11, the metal cylindrical tube 4 is flattened to form a metal flat tube 1, so that the first convex strip 31 of this embodiment is welded to the upper half inner wall 13, and the second convex strip 32 is welded to the lower half inner wall 14. The capillary structure 2 is a woven mesh 24. The upper half capillary structure 21 covers the upper half inner wall 13 and the outer surface 5 of the first convex strip 31, and the lower half capillary structure 22 covers the lower half inner wall 14 and the outer surface 5 of the second convex strip 32. At the same time, the first convex strip 31 moves down to its end as the metal flat tube 1 deforms. The upper half of the capillary structure 21 is attached to the lower half of the capillary structure 22, with a portion of the upper half of the capillary structure 21 sandwiched between the first protrusion 31 and the lower half of the capillary structure 22. Specifically, two layers of woven mesh 24 are sandwiched between the first protrusion 31 and the lower half of the inner wall 14. The second protrusion 32 moves upwards as the metal flat tube 1 deforms, and its end is attached to the upper half of the capillary structure 21. This allows a portion of the lower half of the capillary structure 22 to be sandwiched between the second protrusion 32 and the upper half of the capillary structure 21. Specifically, two layers of woven mesh 24 are sandwiched between the second protrusion 32 and the upper half of the inner wall 13. This achieves the same effect as the embodiments shown in Figures 6 to 9.
[0051] As shown in Figures 12 and 13, this is the fourth embodiment of the heat dissipation flat tube 10 disclosed herein. The embodiments in Figures 12 and 13 are generally the same as the embodiments in Figures 1 to 5. The difference between the embodiments in Figures 12 and 13 and the embodiments in Figures 1 to 5 is that the first protrusion 31 extends integrally from the upper inner wall 13, the second protrusion 32 extends integrally from the lower inner wall 14, and the capillary structure 2 is a groove 25 arranged along the axial length H.
[0052] The following is a detailed description: In this embodiment, the metal cylindrical tube 4, the groove 25, the first protrusion 31, and the second protrusion 32 are all manufactured by cold drawing or rolling. The metal cylindrical tube 4 is then flattened to form a metal flat tube 1, so that the first protrusion 31 extends integrally from the upper inner wall 13, and the second protrusion 32 extends integrally from the lower inner wall 14. Simultaneously, the first protrusion 31 moves downwards along with the deformation of the metal flat tube 1 to its end, attaching to the lower capillary structure 22, and the second protrusion 32 moves upwards along with the deformation of the metal flat tube 1 to its end, attaching to the upper capillary structure 21. This achieves the same effects as the embodiments shown in Figures 1 to 5.
[0053] As shown in Figure 14, this is the fifth embodiment of the heat dissipation flat tube 10 disclosed herein. The embodiment in Figure 14 is largely the same as the embodiments in Figures 6 to 9. The difference between the embodiment in Figure 14 and the embodiments in Figures 6 to 9 is that the first protrusion 31 extends integrally from the upper inner wall 13, and the second protrusion 32 extends integrally from the lower inner wall 14.
[0054] Further explanation is as follows: the metal tube 4, the first protrusion 31 and the second protrusion 32 are first made by cold drawing or rolling, and then the sintered powder 23 is heated to form a capillary structure 2 covering the inner periphery of the metal tube 4 and the outer surface 5 of the first protrusion 31 and the second protrusion 32.
[0055] The metal cylindrical tube 4 is then flattened to form a metal flat tube 1, so that the first convex strip 31 extends integrally from the upper inner wall 13, and the second convex strip 32 extends integrally from the lower inner wall 14. The upper capillary structure 21 covers the outer surface 5 of the upper inner wall 13 and the first convex strip 31, and the lower capillary structure 22 covers the outer surface 5 of the lower inner wall 14 and the second convex strip 32. At the same time, the first convex strip 31 moves down with the deformation of the metal flat tube 1 to its end and attaches to the lower capillary structure. Structure 22 is configured such that a portion of the upper capillary structure 21 is sandwiched between the first protrusion 31 and the lower capillary structure 22, i.e., two layers of sintered powder 23 are sandwiched between the first protrusion 31 and the lower inner wall 14. The second protrusion 32 moves upward along with the deformation of the metal flat tube 1 and attaches to its end to the upper capillary structure 21, so that a portion of the lower capillary structure 22 is sandwiched between the second protrusion 32 and the upper capillary structure 21, i.e., two layers of sintered powder 23 are sandwiched between the second protrusion 32 and the upper inner wall 13. In this way, the same effect as the embodiments in Figures 6 to 9 is achieved.
[0056] As shown in Figure 15, this is the sixth embodiment of the heat dissipation flat tube 10 disclosed herein. The embodiment in Figure 15 is largely the same as the embodiments in Figures 10 and 11. The difference between the embodiment in Figure 15 and the embodiments in Figures 10 and 11 is that the first protrusion 31 extends integrally from the upper inner wall 13, the second protrusion 32 extends integrally from the lower inner wall 14, and the capillary structure 2 is a woven mesh 24.
[0057] The details are as follows: the metal tube 4, the first protrusion 31 and the second protrusion 32 are first made by cold drawing or rolling, and then the woven mesh 24 is covered on the inner periphery of the metal tube 4 and the outer surface 5 of the first protrusion 31 and the second protrusion 32 to form a capillary structure 2.
[0058] The metal cylindrical tube 4 is then flattened to form a metal flat tube 1, so that the first convex strip 31 extends integrally from the upper inner wall 13, and the second convex strip 32 extends integrally from the lower inner wall 14. The upper capillary structure 21 covers the outer surface 5 of the upper inner wall 13 and the first convex strip 31, and the lower capillary structure 22 covers the outer surface 5 of the lower inner wall 14 and the second convex strip 32. At the same time, the first convex strip 31 moves down with the deformation of the metal flat tube 1 to its end and attaches to the lower capillary structure 22. Structure 22 arranges a portion of the upper capillary structure 21 between the first protrusion 31 and the lower capillary structure 22, i.e., two layers of woven mesh 24 are sandwiched between the first protrusion 31 and the lower inner wall 14. The second protrusion 32 moves upward as the metal flat tube 1 deforms, and its end attaches to the upper capillary structure 21, thus arranging a portion of the lower capillary structure 22 between the second protrusion 32 and the upper capillary structure 21, i.e., two layers of woven mesh 24 are sandwiched between the second protrusion 32 and the upper inner wall 13. This achieves the same effect as the embodiments shown in Figures 10 and 11.
[0059] In conclusion, the heat dissipation flat tube with built-in convex strip structure disclosed herein can indeed achieve the intended use purpose, solve the deficiencies of conventional technology, and has industrial applicability, novelty, and progress. It fully meets the requirements for patent application, and therefore, this application is filed in accordance with the Patent Act to protect the rights of the creator.
[0060] 10: Heat dissipation flat tube 1: Metal flat tube body 11: Sealing section 12: Vacuum Chamber 121: Airflow Space 13: Upper inner wall 14: Lower inner wall 2: Capillary structure 21: Upper half capillary structure 22: Lower half capillary structure 23: Sintered powder 24: Woven Net 25: Trench 3: Raised bar structure 31: First convex bar 32: Second convex strip 4: Metal cylindrical tube 5: Outer surface H: Axis length 100: Positioning rod
Claims
1. A heat dissipation flat tube with a built-in convex strip structure, comprising: A flat metal tube having two sealed portions formed at its two ends and a vacuum chamber formed therein, an upper inner wall and a lower inner wall, the flat metal tube defining an axial length between the two sealed portions; a capillary structure including an upper capillary structure disposed on the upper inner wall and a lower capillary structure disposed on the lower inner wall; a working fluid contained in the vacuum chamber; and a rib structure including at least one first rib connected on one side to the upper inner wall and arranged along the axial length and abutting against the lower capillary structure on the other side, and at least one second rib connected on one side to the lower inner wall and arranged along the axial length and abutting against the upper capillary structure on the other side, the upper capillary structure, the lower capillary structure, the at least one first rib and the at least one second rib separating the vacuum chamber into a plurality of non-communicating airflow spaces.
2. A heat dissipation flat tube with a built-in convex strip structure as described in claim 1, wherein the at least one first convex strip is welded to the upper inner wall and the at least one second convex strip is welded to the lower inner wall.
3. A heat dissipation flat tube with a built-in convex strip structure as described in claim 2, wherein the capillary structure is sintered powder, the upper half capillary structure only covers the bottom ends of both sides of the at least one first convex strip, the end of the at least one first convex strip is attached to the lower half capillary structure, the lower half capillary structure only covers the bottom ends of both sides of the at least one second convex strip, the end of the at least one second convex strip is attached to the upper half capillary structure, and the outer surfaces of the at least one first convex strip and the at least one second convex strip are provided with grooves.
4. A heat dissipation flat tube with a built-in ridge structure as described in claim 1, wherein the at least one first ridge extends integrally from the upper inner wall and the at least one second ridge extends integrally from the lower inner wall.
5. A heat dissipation flat tube with a built-in ridge structure as described in claim 2 or 4, wherein the capillary structure is sintered powder or woven mesh, the upper half of the capillary structure is covered on the outer surface of the at least one first ridge, a portion of the upper half of the capillary structure is sandwiched between the at least one first ridge and the lower half of the capillary structure, the lower half of the capillary structure is covered on the outer surface of the at least one second ridge, and a portion of the lower half of the capillary structure is sandwiched between the at least one second ridge and the upper half of the capillary structure.
6. A heat dissipation flat tube with a built-in ridge structure as described in claim 4, wherein the capillary structure is a groove arranged along the axial length, the end of the at least one first ridge is attached to the lower half of the capillary structure, the end of the at least one second ridge is attached to the upper half of the capillary structure, and the outer surfaces of the at least one first ridge and the at least one second ridge are provided with grooves.
7. A heat dissipation flat tube with a built-in ridge structure as described in claim 6, wherein the metal flat tube body, the groove, the at least one first ridge and the at least one second ridge are manufactured by cold drawing or rolling.
8. A heat dissipation flat tube with a built-in ridge structure as described in claim 4, wherein the metal flat tube body, the at least one first ridge and the at least one second ridge are manufactured by cold drawing or rolling.
9. A heat dissipation flat tube with a built-in convex structure as described in claim 1, wherein the number of one of the first convex strips and the second convex strip is N and the number of the other is N or N+1, where N is a positive integer, and the at least one first convex strip and the at least one second convex strip are arranged alternately.
10. A heat dissipation flat tube with a built-in convex structure as described in claim 1, wherein the sealing portion is made by degassing and sealing, and the metal flat tube body is made by compressing and deforming a metal round tube body.