TW553791B - A method of manufacturing inner conducting layer of heat pipe using brazing process - Google Patents

Abstract

A method of manufacturing inner conducting layer of heat pipe makes use of brazing process. The steps include, depositing braze filler on the inner surface of metal tube, placing metallic net (or metallic wire) on the braze filler and finally brazing the above metallic tube in order to join metallic net (or metallic wire) onto the inner surface of the metal tube.

Description

553791 91134022 V. Description of the invention (1) Technical field to which the invention belongs:

The method / 2 is; the method of making the inner guide layer of the heat pipe with a strict welding process of the species Λ In the invention, the stone welding process is used to fix the Jin Guangfang to the inner pipe wall of the heat pipe, and then fix it with the right (I or metal wire) In the process, the metal net (or metal wire) and the conductor: J or the phenomenon of using the process bit occur. What this method does / makes: ^ 2 The heat dissipation efficiency, reliability, and process yield of the thermal conductivity after the wall is peeled off or moved. Pages of justice. Prior technology: Due to the increasing frequency of computers today, the heat generated by components is also increasing with the speed of various types of computers in the computer t4. For example, the speed of the computer is increased, such as: the center of the computer The processor (CPU) and chipset are suitable for generating high heat during use. In particular, the central processing unit in the computer generates a large amount of heat during the execution of computational processing and must be cooled by a radiator to prevent the component from crashing or being damaged due to overheating. At present, the heat dissipation problem of the heating elements in the notebook computer is the most serious. Today, copper heat pipes are mostly used in notebook computers to dissipate heat from CPUs and other heat-generating components. Pure copper itself has a very high thermal conductivity (4.00 W / cm / K) 'far south than common metal materials such as: iron (0.802w / cm / K), nickel (0.907W / cm / K), titanium (0.2219W / cm / K), Shao (2.37W / cm / K)

• ··Wait. Pure copper and its alloys are widely used in various heat sinks due to their high thermal conductivity. The principle of the copper heat pipe is to use a coolant (Coolant). When the hot end of the heat pipe is heated, it evaporates to a gaseous state, and its volume will expand rapidly and form a rapidly flowing airflow in the pipe. This airflow is directed at the heat pipe at high speed.

Page 5 553791 Case No. 91134022 Λ_3. Revision V. Description of the invention (2) Flowing in the direction of the cold end and condensing into a supersaturated vapor or liquid at the cold end tube wall, and then flowing back to the heat of the duct through the capillary phenomenon of the tube wall end. In this way, the coolant in the heat pipe is circulated due to heating and cooling, and the heat of the heating elements in the computer is removed. The key technology for making a heat pipe is that the inner wall of the heat pipe must be made into a rather rough surface to improve the capillary phenomenon of fluid (coolant) and improve the efficiency of thermal convection. In order to achieve the above goals, today's products have various methods, such as: roughening the surface of the original smooth copper pipe, or the groove, or #carved to make the surface rough chain, or embossed, or in the copper pipe The fine metal mesh is in contact with the inner wall of the copper pipe to enhance the capillary flow of the inner wall of the copper pipe. Among them, the most commonly used method today is to fill a fine metal mesh in a copper pipe. The appearance of the heat pipe can be flat or round. For example, the current common process is to use a pure copper tube, and place a rolled metal mesh in it before pressing it into a flat shape with mechanical force to increase the contact area between the heat pipe and the heat dissipation element and improve its heat transfer. efficacy. After that, the coolant is filled and injected under a low-pressure vacuum state, and then the nozzle is pressurized and tightly sealed, and the nozzle is sealed and arc-sealed by arc welding or gas welding. As mentioned above, to make a high-efficiency heat pipe, it is necessary to have a strong capillary flow in the pipe. The most commonly used method today is to fill a cylindrical metal mesh into a copper tube and contact the inner wall of the copper tube to achieve the above-mentioned goal of enhancing capillary flow. The disadvantages of this existing process will be described below. First of all, during the pressing process, the copper metal fine mesh is filled in the copper pipe, and uneven distribution may occur, which seriously affects its efficiency. For example, if the metal mesh in the tube is abnormally twisted, deformed or overlapped during the pressing process, the metal fine mesh is formed in the tube and unevenly distributed in the tube during the pressing process.

Page 6 553791 _Case No. 91134022_ Revised Year of the Month_ V. The phenomenon of (3) of the invention, at this time not only may cause heat pipe blockage, but also may cause the copper mesh and inner wall of the copper pipe to peel off in some areas, resulting in this. Reduced or ineffective heat pipes. Secondly, using this traditional process will increase the diameter of the heat pipe produced by it, and the probability of the copper mesh and the inner wall of the copper pipe peeling will increase, which will cause its yield to decrease. Finally, if the heat pipe needs to be bent and deformed due to the requirements of the use specifications, this will cause the heat pipe to easily block and prevent airflow during the bending process, or the copper mesh and the inner wall of the copper pipe peeling off to cause capillary flow. Causes the effectiveness of this heat pipe to decrease or fail. The heat conduction of the inner tube of the square tube is used to make the welding process. Use a kind of material for Ming Rongfa. 3 Mingfa took it in the process and used a fixed line or wire. The effective process is to weld, and the hard-walled tube guides the inner bright tube. The thermal method is effective for the wire metal or j · C. Discovery of the astigmatism tube

(It is issued by the Department of Ming-Bei, etc.) ^ • 1 The method used in the remaining fill-in of column C is to make the step complete or to remove the effect. It can be used to make a good wall of the tube, the inner tube and the tube's conductance. The heat can be transmitted by the heat.) # The inner tube of the upper tube and the upper tube are made of gold when the wire is placed or filled or welded; In the middle of the z material line, fill in M gold, and dry it in the metal of the network and the metal pipe in the wall. In the introduction of the spectrum • 1 the • 1 C material line or the metal of the metal is welded to the process. The gold pipe inside the wall-entry pipe is described as gold. The / 1 / method uses this method to make the heat conduction of the layered inner pipe of the French method for the welding process. Uttul

Page 7-^ Ά 911340 ^ 9 It is said that the heat pipe used by Japan and France ’will have a physical degree and a process yield. The following example L is called the heat dissipation effect4. The first figure is a t j plane view of the present invention using the method of the present invention. In the picture, ^^ P is used to make the interior of the heat pipe for January. (0) (1) is a metal mesh (or metal wire). U ¥ layer: metal pipe. Its manufacturing method is detailed. m? True g (3) The appropriate one hundred first, first gold = above the inner wall of the tube. This gold tube is placed with a hard f-filler (2) and is placed under the "number" such as: copper, silver, aluminum, and V: materials must have high heat according to the above, 10, 2 materials, pure copper. As for the brazing filler material, P ® is different from the above-mentioned metal pipe materials: 4 materials can be welded together. ^ Release potential silver, aluminum or tantalum into t ° gold. In general, pure copper pipes are more commonly used, which are brazed and brazed with dart base or silver-based braze fillers. This compression molding type: for paste, sheet, wire or powder, the metal mesh (or metal wire) (1) is placed on brazed metal copper by brazier. The brazed filler (2) will be between the metal pipe (3) Inner wall fish two j,., 罔 (or metal wire) (1). Finally, the above-mentioned metal pipe (3) containing the metal mesh / wire (1) and the brazing filler material (2) is subjected to a brazing process, and the metal mesh (or metal wire) (1) is fixed to the metal The inner tube wall of the tube (3). Hard, manufacturing process, a bonding process, mainly refers to the fact that under the premise that the base material does not melt, ‘the brazing filler material melts and forms a contact, and the temperature of this process must be greater than 450 ° C. As mentioned above, the brazing process can be used: flame brazing (furch brazing), furnace brazing (vacuum brazing), vacuum brazing (induction brazing), dipbrazing (dipbrazing) ), Resistance brazing (diffusion brazing), diffusion brazing (infrared brazing), electron beam brazing

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After elenon beam brazing) ... wait for the brazing process. After the brazing process, gold = Feng (or metal wire *) (1) is fixed and then connected to the inner tube of the heat pipe. Ϊ́ν 入 可 // To avoid the occurrence of the entire network in the subsequent manufacturing or use process (Or metal line) peeling or displacement of the inner wall of the heat pipe. The tube example is another type made by applying the above principle. The guide is shown in the figure. . The view in the picture is a partial enlarged view of the "face." I = sheet. First, the metal GfU of appropriate size is thin (2), and then the metal mesh (or metal wire) (丨) is brazed. ^ ^ 8 1) Placed on the brazing filler Ϊ * "仃 brazing process to join and fix the metal mesh (or gold wire eight sense binding piece (3). After the above brazing, the gold, only ') A flat plate type heat pipe with a metal sheet (3) and a metal (or metal wire) (1) connected to the rear side of the metal net (or metal wire) (1). " Using this brazing process with Zhicheng's internal metal mesh and then fixing all the pipes, the biggest advantage is that when the heat pipe should be a wire) in the design requirements of the heat transfer internal space, it may be necessary to weave the tune ... During the assembly, due to how to process and change the percentage, this can be guaranteed to be hard two: m regardless of the external network (or metal wire), it will not be fixed with the metal pipe to ensure that the capillary flow in the heat pipe is unobstructed. Mao Shengzhao leaves. In this way, the specific embodiment described above is used for detailed characteristics and effects. For the purpose of the person skilled in the art, the specific embodiment is partially changed or modified, and the scope is based on the above description. Any modification and retouching without departing from: = Departing from the spirit of the present invention shall belong to the scope of application of the present invention. In the basic spirit of X Ming,

553791 _Case No. 91134022_year month_1TL · _ Brief description of the drawing The first figure is a cross-sectional view of the inner conducting layer of a heat pipe made by the method of the present invention. The second figure is a cross-sectional view of the inner guide layer of a flat-type heat pipe made by the method of the present invention. Brief description of the components in the figure: 1-Metal mesh (or metal wire) 2-Brazing filler material 3- Metal pipe

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Claims (1)

553791 Case No. 91134022 Amendment 6 、 Scope of patent application Air brazing, high frequency brazing, immersion brazing, infrared brazing. 7. A method for manufacturing an inner conducting layer of a heat pipe by a brazing process as described in item 5 of the scope of the patent application, wherein the material of the brazing filler material includes at least one group selected from a copper-based and a silver-based alloy. 8. A method for manufacturing an inner conducting layer of a heat pipe by a brazing process as described in item 5 of the scope of patent application, wherein the material of the metal pipe is copper metal. Page 12