TW200523518A - Flat plate heat transfer device and method for manufacturing the same - Google Patents

Abstract

A flat plate heat transfer device contacted with heat source and heat-emitting unit at both end transfers heat generated at the heat source to the heat-emitting unit horizontally. The device includes a thermally-conductive flat case containing a working fluid evaporated with absorbing heat from the heat source and condensed with emitting heat to the heat-emitting unit; and a mesh aggregate installed in the case so that coarse and fine meshes in which wires are woven to be alternately crossed up/down are vertically laminated in contact. The coarse mesh gives main-directional and sub-directional vapor dispersion channels with different sectional areas at each crossing point of the mesh wires for vapor to flow therethrough. The main-directional vapor dispersion channel with relatively larger sectional area is parallel to heat transfer direction. The fine mesh gives liquid flow channels along running direction of the mesh wire from each crossing point of the mesh wires.

Description

200523518 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a flat plate heat conversion device, which is capable of dissipating heat from a heat source by circulating a working solution by using evaporation and condensation, and a method for manufacturing the same. In particular, it refers to a flat heat conversion device capable of preventing a flat box from being crushed and providing the directions of the steam dissipating passage and the -liquid flow passage, so as to achieve the maximum heat conversion efficiency, and a manufacturing method thereof. [Previous technology] Recently, with the development of integrated circuit technology, electronic devices such as notebook computers or personal digital assistants (PDAs) have also become lighter, lighter, newer, and smaller. In addition, functions have improved. The reduction of energy consumption is also an important consideration. Therefore, when these electronic devices are operated, a lot of heat is generated from the electronic parts in these electronic devices, so that various flat heat conversion devices are used to dissipate the heat to the outside. The fourth day is like a conventional example of a flat heat transfer device, and the use of a heat pipe is well known. The heat pipe is set so that a sealed container is decompressed to become empty, so as to be isolated from the surrounding air, and a working solution is injected into each container, and the container is sealed. As for the operation of the container, the first job is Zhaling; it is heated at night and radiates a nearby heat source and flows through the cooling section. During this cooling time, the gas is condensed again into a liquid, and then returns to its original position. = With this working solution circulation mechanism, the heat generated by the heat source is dissipated to the outside ^ 'Thus, the temperature of the electronic device can be maintained at a suitable relative standard.

Akachi et al. Published U.S. Patent No. US5642775 discloses a flat plate 200523518 Relu / a plate having microchannels called capillary tunnels made of extruded square wires and filled with a working solution. If the _ end of the board is added with Λ ,,, / / work, the 4 liquid is heated and evaporated into vapor, and then flows to the other end of each, and then cooled and re-knotted and flows to the-heating section: 4 US patents may be used on motherboards and printed circuit boards. However, it is very difficult to form several such small capillary channels by extrusion. , 1 t 0h published U.S. Patent No. US5309986 discloses an airtight rectangular container • and-a heat transfer body (working solution) is filled in the container. In the patent, a chute is formed on the inner surface of the container, and the container has several protruding corners, so that the working solution of the condensate can be evenly distributed over the entire area of the container. Therefore, the container can effectively Heat absorption and heat dissipation.

Li et al. Itoh issued U.S. Patent No. US6,148,906, which discloses a flat-plate heat pipe system for transferring heat energy from a heat source provided on a wall of an electronic device to heat dissipation. The flat heat pipe system includes a metal bottom plate, which includes a set of rods destroyed in its recess, and a top plate to cover the bottom plate. However, the bottom plate is limited in size, and the top plate and the rods are decompressed and filled with a working solution. As described above, the working solution absorbs heat from the heating section of the channel, and then flows to a heating section ', and the working solution condensed in the cooling section is again circulated to the heating section to cool the equipment. Please refer to the figure shown in the figure below, which is a cross-sectional view of a conventional flat heat conversion device. As can be seen from the figure, a heat dissipation unit 10 is installed between a heat source 20 and a heat sink 30, which is another example of a conventional cooling device. The heat dissipation unit 10 is installed so that a working solution is filled in one of the thin metal boxes 50, 200523518 space centimeters, and the capillary structure 60 is formed on the surface Γ of the thin metal box 50. The heat source 20 The generated heat is transferred to the capillary structure 6G in the heat dissipation unit 1G in contact with the heat source 2G. In this range, the masterpiece dissolved in the capillary structure 60 'is evaporated and dissipated in all directions of the shaft space fairy'. Then, a heat sink is installed, cooled in one of the capillary structures 6Q, and heat is condensed in the domain. . The heat dissipation system in the condensation process is transferred to the heat sink 30 ′, and the power of the convection generated by the cooling fan 7Q will dissipate to the basin. ^ A like this 卩 The device should have sufficient space for the steam to flow, because when the work material is in a sloppy state, it depends on the reduction of the firing, and the evaporated steam relies on the cold and light regions. "The flat box in this thin and thick flat plate heat conversion device is not easy to suffocate the steam to dissipate. It is because the flat box is kept in an empty state (or-decompression-like center). The upper plate and the lower plate are easily crushed or distorted during the manufacturing process, thus reducing the reliability of the product. [Summary of the Invention] The present invention is designed to solve the problems of the conventional technology. The object of the invention is to provide a flat heat conversion device, which has a geometric structure by firmly supporting the flat box of the flat heat conversion device, which prevents the device from being twisted and guarantees the reliability of the product, and also provides steam. The dissipation channel and a liquid flow channel are in the m direction, so that the device has the effect of thermal conversion. In order to achieve the above-mentioned object, the present invention provides a flat plate thermal conversion device 'its-end system connection-heat source and another-end system connection- The heat dissipation unit is a device that converts thermal energy in a horizontal direction. The system includes: 200523518, a special 'flat box', which contains one of the evaporation working solution absorbed from the heat source, and the heat is condensed to the heat dissipation unit. ; And ΐ set ,,, and 罔 are installed in the heat-conducting flat box, so that a coarse mesh and a fine mesh are made up / down perpendicular to each other; The main direction / person direction steaming and dissipating passages with different cross-sectional areas are provided at the intersections, and steam is allowed to flow therethrough. The main direction evaporating and dissipating passages parallel to the heat direction have a large cross-section ; Passage where the thin mesh is provided with better liquid flow along each intersection of the network line, the opening width of one of the thick meshes [M = (1-Nd) / N, where N is the number of 矣, d Is a wire diameter (inch)] between 19 and 2.0 mm, the thick net has a wire diameter between 0 · Π and 0.5 mm, and the thick net has one eight square meters and eight square meters. It has an opening area of 4 square millimeters. This coarse mesh is more comparable. The standard of the Material Testing Association (ASTM) E-ll-95 is based on the ancient 1Λ χ according to the number of national nets.… There are 10 to 6. More Fortunately, the opening width of the fine mesh [ΜΚ1 -Nd) / N, where, the number, d is the wire diameter (inches)] is between 0. 019 and 0_18 mm, and the Shiwei net has a range from 0.02 to · Wire diameter of 16 mm, the ear has a fine mesh, /, 0 · 00036 mm square opening face in harvest to 0.5 of 0324 mm2. 1 in

According to the American Society for Testing Materials Specification (ASTM) E-11-95 Order I, there are 80 to 400 nets. Better yet, the fine mesh system is located next to the heat source, and Yuxi, Ertong® mesh system is located adjacent to the heat sink. ~ 200523518 According to one aspect of the present invention, the installation of the aggregation network facilitates the insertion of the coarse mesh between the two fine meshes. At this time, at least a part of the coarse mesh inserted between the two layers of fine meshes is provided with an additional fine mesh to interconnect the fine meshes to create a liquid channel. As far as another aspect of the present invention is concerned, the installation of the material collecting network is convenient for pressing the fine mesh, the coarse mesh, and the intermediate mesh from the bottom to the top layer by layer. Here, the intermediate: the number of nets is relatively more than the number of the coarse nets, and the number of nets is less than that of the thin nets. Eight fine meshes or additional intermediate meshes 'in order to interconnect the fine meshes: In terms of the following point of view, the' gathering network is equipped with printed ,,,,,,, and .. To the heat sink. At this time, the intermediate network has an inter-network system that moves from the rough to the steam red and the vapor flow is relatively short; ^ start the work room so that according to the present invention, the flat plate heat transfer system is further advanced-the structure is provided with connecting bars _ And set in the correction = capillaries and at the same time by containing from the solution as a solution and flowing through the merging, absorbing and evaporating heat source, r formed by engraved polymer, stone Xi, steel chain powder, or According to the present invention, the fine mesh and the intermediate mesh have different cross sections in the eight primary and secondary liquid flow channels. The alternative is to implement the box; the box is formed of steel, nickel, or nameplate. It is formed as a concavo-convex, like: == solution steel, so that the inner surface of the liquid 其中 channel 200523518 is parallel to the heat transfer direction. According to the invention, the working solution is water, ethanol, ammonia, methanol, nitrogen or digas difluoromethane. Preferably, the total amount of the working solution when filled is 80 to 150 percent of the pores. According to the invention, the net is made of metal, polymer or plastic. Here, the metal is steel, aluminum, stainless steel, molybdenum, or an alloy of these metals. Except that, the heat-conducting flat box is made of metal, polymer, or plastic, and the metal system can be copper, aluminum, stainless steel, molybdenum, or an alloy of these metals. In order to achieve the above-mentioned object, a method for manufacturing the flat heat conversion device is provided. First, the upper and lower plates of the flat box are formed separately. Then, a gathering net with a thick net structure is interlaced and weaved up and down to provide a vapor dissipation channel; and a fine net is interlaced and weaved up and down to form a sheet vertically and inserted into the flat box. . Here, the coarse mesh system is mainly used to provide a radon dissipating passage; and the fine mesh system is mainly used to provide a liquid flow passage. Each coarse wire cross point of the net has different cross-sections in the primary and secondary directions of the evaporation channel, so that the evaporated vapor flows from the working solution through it, and when the gathering net is inserted into the flat box It is important to adjust the direction of the coarse mesh, so that the steam dissipating channels in the main direction of the coarse mesh are commutated in parallel. After that, the upper plate is assembled with the lower plate to form a flat box, and a working solution injection hole is left. Then, fill the working solution injection hole with decompression = inside, and inject the working solution into it. Finally, seal the injection. Work = flat box of liquid. 1 Xia Ling [Embodiment] Please refer to the second embodiment, which is a cross-sectional view of the preferred embodiment of the invention. The flat plate heat conversion device 100 of the present invention includes a flat box 130 which is installed between a heat source 110 and a heat dissipation unit 120, like a heat sink, and is composed of an upper plate 130a and a lower plate 130b. An aggregation net G is inserted into the flat box 130, and a working solution acts as a medium for transferring heat energy in the flat box 130. Here, the gathering net G is installed so that the wires of a fine net 140 are interlaced weave up and down, and the wires of a thick net 150 are interlaced weave up and down, and are formed into sheets perpendicularly opposite to each other. Therefore, it should be understood that the terms "fine mesh 140" and "thick mesh" are defined according to the relative mesh lattice density, and the fine mesh 140 has a larger number of meshes than the coarse mesh 150. The flat box 130 is made of metal with high thermal conductivity, conductive polymer, or thermally conductive plastic, which makes it easy to absorb heat energy from the heat source 110 and to dissipate heat from the heat dissipation unit 120. Please refer to Figures 4 and 6 for tea. The fourth figure is a plan view of the coarse grid absorption net structure of a preferred embodiment of the creative flat plate heat conversion device, and the sixth figure is an enlarged view of the detailed structure of the absorbent net of a preferred embodiment of the flat plate thermal conversion device. Plan view. The thick mesh 150 is prepared so that the horizontal lines 150a, 150b and the vertical lines 150c, 150d are staggered at intervals. The above thick mesh 150 is made of metal, polymer or plastic threads. More preferably, the metal is copper, aluminum, stainless steel, molybdenum, or an alloy of these metals. In addition, the coarse mesh 15 series is also various shapes, such as square, rectangular, or according to There are other shapes for the flat box to be designed. —Please refer to _5_ for a plan view of the fine mesh absorption network structure of a preferred embodiment of the flat heat conversion device created by the county. The fine mesh 14 and the coarse mesh 11 200523518 are preferably in contact with each other. The fine mesh is made up as the above coarse mesh 15: the same, with the same materials and used in the same way:-for the same day, the G network of the present invention is also installed as shown in the third figure, " It consists of a coarse mesh layer 150L laminated with a two-layer coarse mesh, and a fine mesh layer 14QL laminated with a three-printed, a field, and a field. However, the layers of these mesh layers The pressure is not special, it is usually selected according to the cold power of the device or the thickness of the electronic equipment. 1 鸯 ~ Overlay As shown in the sixth figure, the fine mesh 14 ° and the coarse mesh 15 ° The visibility M is usually expressed by the following first equation.

Μ = (1-Nd) / N with? The number of standing nets (the number of grids in the middle of the length of a central inch). According to the present invention, the thick net 150 plays a role of providing evaporation and a diffuse channel. In particular, please refer to the seventh figure.] The conversion device-the preferred embodiment is viewed from the χ direction-is formed in the side cross-sectional side view of the% gas dissipation channel. Wherein, the system is connected to the longitudinal line i50c ^ and is in contact with the upper surface of the longitudinal line 15Gd. Although it is shown in the figure that the two lines of the two lines are arranged at another angle of 2 °, at this time, it is close to the upper surface of the legs of the line and the lower level. From the parent fork point j of the edge 15Gc, and the horizontal line 15 as follows: 'Follow the vertical line 15Gc and the vertical direction of the flow direction to form the I-divergence channel Pv, and the domain evapotranspiration The wearing area of the channel pv is gradually 2 12 200523518 The intersection point J decreases. In addition, as shown in the sixth figure, the vapor, ％%, and political passage Pv are formed by all the intersections f, right, and left of the horizontal lines 150a, 150b and vertical lines 150c, 150d. As a result, the air reduction through the passage of such a structure is quickly dissipated. In the sixth figure, the dissipation path of the vapor through the vapor purge channel pv is described by the arrow symbol "". 'The maximum cross-sectional area A of the vapor dissipation channel Pv can be calculated from the following β Equation 2: A = (M + d) d- π d2 / 4 From Equation-and Equation 2, we can understand that when the number N decreases and the line diameter As d increases, the maximum cross-sectional area a of the vapor dissipation passage Pv increases. However, the maximum cross-sectional area A of the vapor dissipation channel pv is not the same when viewed from the flow direction γ of the suan% ^ lines 150a and 150b and from the flow direction X of the vertical lines 150c and 150d. As shown in the sixth figure, if the coarse mesh 15 is a gauze knitted with fixed longitudinal threads 150c and 150d, the maximum wearing area A of the vapor dissipation channel Pv viewed from the flow direction X is Considered larger than the flow direction Y. As shown in the seventh figure, the vapor dissipation channel Pv is viewed from the flow direction X; as shown in the eighth figure, the vapor dissipation channel Pv is viewed from the flow direction γ. The coarse mesh 150 has a vapor dissipation flow rate larger in the flow direction X than in the flow direction γ. A direction having a larger vapor dissipation flow rate is referred to as a main direction ', and a direction having a relatively small vapor dissipation flow rate is referred to as a secondary direction. Because the total amount of fluid (vapor or liquid) that can flow through the main direction is more than the total amount of fluid that can flow through the secondary direction, the primary direction has better permeability than the secondary direction. As far as the facts are concerned, the gathering network G is installed as shown in the second or third figure. The main direction in which the coarse mesh 150 is installed is parallel to the heat conversion direction, #, one of the directions of the present invention from the heat source 110 to the heat dissipation unit 120. Therefore, a vapor can flow into the heat conversion direction quickly, so that the heat conversion performance of the flat plate heat conversion device 100 can reach the optimal situation. At the same time, as shown in the ninth figure, when the flat plate thermal conversion device 100 is actually operated, due to the surface tension of the working solution, a liquid film 100 is formed on the horizontal line of the coarse mesh 150 and Between the vertical line intersection point j and the vapor dissipating channel Pv ′, therefore, the actual cross-sectional area of the vapor passing through the vapor dissipating channel is reduced by as much as the area occupied by the liquid film 170. Here, the ratio of the maximum cross-sectional area A of the liquid film 170 to the vapor dissipation channel Pv decreases as the number of nets N decreases or the line diameter ^ increases. If the number N of the coarse mesh 150 is very large and the line diameter d is often small, the maximum cross-sectional area A of the vapor dissipation channel Pν is significantly reduced to increase the flow resistance, and due to the surface tension, The vapor dissipation channel pv is blocked by the fluid, so that the vapor cannot pass through it. According to the experiments performed by this household, if the number of nets N is in the range of 10 to 60, it is in accordance with the specifications of the American Society for Testing and Materials (astm) e ~; [丨 ~ 95 At this time, if the wire diameter d of the network cable is greater than or equal to 0.1 mm, it will not be difficult for the steam to pass through the steam dissipation channel Pν. According to the experiments performed by the present invention, the thick mesh system is best to select its line true # d between 0. 17 to 0.5 mm, its opening width M is between .19 mm. Between 0.036 and 4.0 mC. 14 Except 200523518, as shown in the tenth figure, a liquid thin film 170 is also composed of 4 thick nets 15 horizontal lines i50a and 15b on a flat plate and the vertical lines 50c and 15 such as Point 1 is formed by the surface tension of the working fluid. The liquid thin film 170 is connected to the liquid thin film 170 formed at the intersection J. Although not shown in the figure, a liquid thin film system may be formed at the intersection of the horizontal line and the vertical line of the fine mesh 140. Except, because the fine mesh 14 is mainly used as a liquid flow channel (explained later), when the heat conversion device is operated, the empty space of the crystal lattice is completely filled with the liquid film. The connection of the liquid film 170 can be controlled by the mesh number N and / or the wire diameter d of the coarse mesh 150 parameter, and the horizontal flow of the working solution can also be generated by the capillary force described below. Although the dissipation of the evaporated working solution is mainly introduced into the coarse mesh through the gas dissipating channel pv, 50, the horizontal flow of the liquid can also be generated by the capillary force of the liquid film 17, which is connected to each other. To import. At this time, the horizontal flow direction is opposite to a heat conversion direction. Except that, the total amount of horizontal flow of the coarse mesh 150 is relatively smaller than the total amount of liquid horizontal flow generated through the fine mesh 140. Please refer to the second figure again. The coarse mesh 150 provides the vapor dissipation channel Pv, and the fine mesh 140 provides a liquid flow channel. Therefore, the working solution compressed in the heat dissipation unit το 120 is returned to the vicinity of the heat source 110 through the liquid flow channel. In particular, in the area of the fine mesh 140 on the right side of the heat source 110, the working solution is continuously caused to evaporate during the heat conversion process. The evaporated working solution is dissipated to the heat-dissipating unit 120 through the vapor dissipating channel Pv of the coarse mesh 150, which maintains a temperature lower than the evaporation point of the working solution. After that, the working solution was compressed in the area directly below the heat sink 15 200523518 yuan 120, and most of it was contained in the liquid film of the fine mesh 14o. However, the work solution in the region of the fine mesh 140 directly below the heat-dissipating unit 120 is superfluous due to the condensation of the valley fluid by the side work, and the evaporation of the working solution is introduced into the fine mesh near the heat source 110 An area of 14 ° makes the working solution insufficient. Therefore, the capillary force is introduced into the interconnected thin liquid film existing within the fine mesh 140, causing the continuous flow of the liquid in a direction opposite to a heat conversion direction. That is, the fine mesh 14o provides the liquid flow path, so that the working solution compressed in the area below the heat dissipation unit 120 is supplied to the heat source 110. If the lattice system is of a small size, the empty space of the grid is filled with the liquid by the surface tension of the working solvent T. So 'the fine mesh 14G acts as a liquid flow channel, not as a vapor dissipation channel. For the same reason as that of the coarse mesh 150, the liquid flow channel of the fine mesh 140 has a different maximum cross-sectional area depending on the direction. Therefore, the fine mesh 1440 also has a main direction ', and the flow rate of the liquid is relatively large; in a primary direction, the flow of the liquid turns to the center and lies in the main direction. In the towel of the present invention, in order to maximize the thermal conversion efficiency of the thermal conversion t of a plate, it is better to put the gathering net G so that the 4 fine mesh 14 < main direction is parallel to the thermal conversion direction. In this way, both the steam dissipation efficiency of the 4 coarse meshes and the liquid flow of the fine meshes are optimized. Therefore, the heat transfer performance of the heat transfer device of the plate is better improved. In terms of the fine mesh 14Π >, 1 Λ, ^ Ai functions, if the fine mesh is based on the standards of the American Society for Materials Testing Society ~ 11,) ~ 11-95, it has 80 to 400 nets 16 200523518 number . According to the experiments performed by the present invention, it is best to select the fine wire 14o with a wire diameter d of 0.02 to 0.16 mm and an opening width M of 〇λ… to 〇. 18 house meters and opening area From 0.0036 square millimeters to 0.0324 also + 丄 卞 million house meters. In the present invention, a capillary structure is provided on the inner surface of the flat box to facilitate receiving, compression, and rapid flow of liquid. Preferably, the capillary structure is formed of sintered copper, stainless steel or nickel powder. In addition, the capillary structure can also be formed by etching polymer, silicon, silicon dioxide, copper, stainless steel, nickel, or planing plate. As another embodiment, the flat plate is held by an electrolytic steel foil and has small irregularities. The thick key capillary structure has a recess of about 10 microns on one side and a smooth surface on the other side. &Quot; According to the flat plate heat conversion device of the present invention, it must be made to a thickness of millimeters, Or more than 2. G mm. Except, the flat = thermal conversion I system has various shapes, such as square, rectangular, T-shaped or the shape shown in Figures 11 to 13. Except, the flat heat The flat 130 of the conversion device is provided with an upper plate 13 (^ — lower plate ·, which is separately separated as shown in the tenth figure, a combination as shown in the fifteenth figure, and as shown in the sixteenth figure. Preferably, the upper plate 130a and the lower plate 130b of the flat box 130 may be made of metal, polymer, plastic or the like having a thickness of less than or equal to 0.5 mm, and the metal system may be copper, Shao, non-ferrous steel or molybdenum. This polymer can use Shengjia's t-compound metal, such as-thermal conductivity Metal. The plastic can also use plastic. The flat box 13G can prepare the upper plate throughout the lower plate: cut the above materials into the desired shape, and then use all kinds of ^ Its connection, such as steel zinc alloy Tan, argon welding (g), welding, laser 200523518 welding, electron beam welding, friction welding and adhesion. The flat box of this connection is reduced to vacuum or low pressure And then fill it with the working solution, such as water, ethanol, ammonia, methanol, nitrogen or dichlorodifluoromethane, and seal it. Better, fill the total working solution in the flat box 130, It is set in the range of 80% to 150% of the pores. Now, what is described in relation to the second figure is a preferred embodiment of the flat-plate heat conversion device according to the present invention. As shown in the second figure It is shown that, according to the present invention, one end of the lower plate 130b of the flat plate heat conversion device ι〇 is adjacent to the heat source no, and one end of the upper plate 13 such as · is provided to the heat dissipation unit 120 as a heat sink or Cooling fan. In the statement, if the temperature of the heat source 110 increases by more than The evaporation point of the working solution, the heat conversion operation is restarted. In particular, the heat generated from the heat source HQ is transferred to the fine mesh 140 through the lower plate 130b of the flat box 130. Then, it is accommodated in the fine mesh 140. The working solution of the net 140 is heated and evaporated, and the evaporated vapor is dissipated in all directions of the flat box 130 through the vapor dissipating channel of the coarse net 150. Here, the evaporated working solution is evenly distributed. Dissipate toward the heat dissipation unit 120. At this time, because the main direction of the coarse mesh 150 is consistent with the direction of the heat transfer, or,

The directions of the heat source 110 to the heat dissipation unit 120 are the same, so the dissipation of the evaporated working solution is optimized. X The dissipated evaporation is compressed in the fine mesh 140 and the coarse mesh 150 directly below the heat dissipation unit 120. The condensation heat generated during the condensation process is transferred to the upper plate i30a of the flat box 130, and then dissipated outward by conduction, natural convection or convective forces, such as a cooling fan. 18 200523518 The work is placed in the fine mesh 150, and then the hair generated by the liquid film interconnects flows to the vicinity of the heat source 'and returns to its original position. At this time; the force night system mainly flows 14G. The condensed working solution is contained in the coarse mesh 150, which mainly flows vertically through the intersection J of the coarse mesh 150 as shown in the tenth figure. After S, it flows horizontally into the fine mesh 14G. In the case of a spoon, the circulation of the working solution continues until the temperature of the heat source is approximately equal to or lower than the evaporation point of the working solution.

In the preferred embodiment, 'because the main direction of the fine mesh i40 is parallel to the heat transfer direction' ^ The thick mesh 15G, so the liquid flow is optimized to provide the condensed working solution immediately Get close to the heat source 110. As understood above, the capillary force generated by the fine mesh 140 interconnected by the liquid film plays the role of an evaporation portion directly above the heat source 110, and a condensation portion of the fine portion 140 directly below the heat dissipation unit 120. Role, and an optimal liquid flow channel.

Except that, the coarse mesh 150 not only plays the role of an optimal vapor dissipation channel, but also plays the role of a condensed part located directly below the heat dissipation unit, and returns to the same path to cause the condensed working solution to be attached to the heat dissipation unit. Right below 120, it can flow vertically to the fine mesh 14 below the coarse mesh 150, and then return to its original position. In particular, since the coarse mesh 150 functions as a steam dissipating passage, it is not necessary to form a empty space in the flat box 130 to provide a separate vapor dissipating passage. In the present invention, the gathering net G is inserted in the middle of the upper plate i30a and the lower plate 130b 19 200523518 to support the upper plate 130a and the lower plate 130b. Therefore, when a vacuum is formed to The upper plate 130a and the lower plate 130b are not crushed when the working solution is filled or when the device is operated. According to the present invention, the aggregation network G shown in Fig. 2 has various modifications' such as shown in Figs. 17 to 23. A flat plate heat conversion device according to another embodiment of the present invention is shown in FIG. Referring to the seventeenth figure, the fine mesh layers 1401 and 140L are formed on the inner surfaces of the upper plate 130a and the lower plate 130b of the flat box 130, and the coarse mesh 150 is inserted in the fine mesh layer 130. Between the net layer 1401 [and 140L, as a vapor dissipation channel. The fine mesh layer 14011 or 140L has at least one layer of fine mesh, as described by thin lines, and the coarse mesh layer has at least one layer of coarse mesh, as described by dots. For example, the lower plate 130b in the flat box is in contact with the heat source 11o, and the child government heat unit 120 is provided to the upper plate i30a, and the vapor evaporated from the lower fine mesh layer contacts the lower plate 130b. It is dissipated through the vapor dissipating channel of the coarse mesh layer 150, and the upper fine mesh layer 1 in contact with the iris plate 13 () is prepared to form a liquid that dissipates heat. Because the upper fine mesh layer or the lower fine mesh layer 140L has a relatively larger network number N than the coarse mesh layer 150, the number of the condensation points is relatively increased, thereby improving its heat dissipation performance. Except, the coarse mesh layer 150 provides a return path so that the working solution condensed on the upper fine mesh layer 140H can flow to the lower fine mesh layer 140l. More preferably, the main direction of the coarse mesh layer 15G and the upper fine mesh layer, and the lower fine mesh layer 140L can be set parallel to the heat radiation direction, so as to optimize heat dissipation and liquid flow. The eighteenth figure is another embodiment of the present invention. Among them, at least #-fine mesh 20 200523518 layer 140M is inserted between the upper fine mesh layer 14OH and the lower fine mesh layer as at least-part of the coarse mesh layer 15G, so that the ^ fine mesh layer is connected to each other ⑽Η and the lower fine mesh layer 140L, as a liquid flow channel provided therebetween. θ is so,

This makes it easier for the working solution that is kinked on the upper fine mesh layer 14o to flow to the lower fine mesh layer 140L. ^ ^, L origin, the coarse mesh layer! 50 and the upper fine mesh layer _, the fine mesh layer is beautiful, and the lower fine layer is set parallel to the scattered age direction, so that the heat dissipation of the vapor and the liquid flow are optimized. According to the present invention, as shown in the nineteenth figure, the system may be compounded with at least three φ different mesh numbers. As shown in Figure 9 of the flat plate heat conversion device, the second and third layer 40 series have at least one layer of fine mesh, which is provided to the bottom plate 130b of the flat box 130 that is in contact with the heat source, enabling the transfer of heat energy to evaporate into a liquid And 2 the coarse mesh layer 150 is a coarse mesh having at least one layer, provided to the fine mesh ^ 40 'to enable a dissipation channel to be provided for the evaporated working solution. Except, the inner surface of the upper plate 130a of the Laiyuan flat box 130 is at least one layer of the intermediate mesh with the heat sink 120. The intermediate mesh layer 140 has at least one intermediate mesh. Fine nets come less. Therefore, the intermediate 罔 layer 140 改善 further improves the transfer efficiency of the condensation heat of the vapor. 1. Better, the main directions of the coarse mesh layer 150 and the fine mesh layer 140 and the intermediate mesh layer 40 are arranged parallel to the heat radiation direction, so that the vapor heat radiation and liquid flow are optimized. In addition, as shown in the twentieth figure, at least one additional intermediate network layer 14o ”is used to interconnect the intermediate network layer 140 and the fine network layer 140 to provide at least a part of the coarse network more progressively The layer 150 is inserted between the intermediate mesh layer 21 200523518 140 'and the additional intermediate mesh layer 140 "to provide a liquid flow channel for the working solution condensed in the intermediate mesh layer 140' to flow to the fine mesh layer. Network layer 140. Although not shown in the figure, the additional intermediate mesh layer 140 "may replace the fine mesh layer 140.

A flat plate heat conversion device according to another embodiment of the present invention is shown in Figs. 21 to 23. The twenty-second figure is a sectional view taken along the line B-B, in the twenty-first figure, and the twenty-third figure is a sectional view taken along the line C-C 'in the twenty-second figure. The flat heat conversion device of this embodiment is more suitably a flat heat pipe. Please refer to Figures 21 to 23. One of the fine mesh layers 140 in the flat box 130 is provided adjacent to the heat source 110, and the intermediate mesh layer 140 is provided adjacent to the heat dissipation unit 120. Except, the fine mesh layer mo and the intermediate mesh layer 140 'are connected to each other through the coarse mesh layer 150. Here, the fine mesh layer 140 is the evaporation portion of the working solution, the coarse mesh layer 15 (acts as a flow channel for evaporation), and the intermediate mesh layer is the condensed portion of the working solution. Therefore, by using the mesh layer 15Gn Xiao San channel,

By transferring heat from the heat source no to the fine mesh layer 14G, the process is evaporated. Then, in the intermediate mesh layer 140, the condensed base gas system is donated to the heat dissipation unit 120. The condensed liquid red is connected through the fine mesh layer 140, and is returned to the base hair again through the fine mesh layer 140. The liquid flow material mr is parallel to the material, and the heat is dissipated. Heat transfer and pre-steam dissipation 22 200523518 Pass = blocked by the formation of a liquid film, so the vapor flow space is best formed as shown in Figures I-1 1 n-1 «« «_ (shown in Figure 12). In the middle mesh layer, the steam is introduced from the coarse mesh layer 150. In this case, the vapor system passing through the screen layer 150 is further dissipated throughout the reading intermediate screen layer 140 'so that the condensation performance and heat dissipation performance can be further improved. As in another embodiment, the intermediate mesh layer 140 replaces the fine mesh layer. In this case, the vapor flow process ′ which is exactly the same as that of the intermediate mesh layer 140 ′ is formed on the fine mesh layer. Except, the vapor flow space is not limited to this embodiment, but it is also suitably designed in a flat box towel as a connection with the miscellaneous net, so that the vapor passes through the vapor of the coarse net; Xiao scattered channel flows, 忐It is guided to the vapor-killing portion of the fine mesh layer 14 directly below the heat dissipation unit 120. " Experimental Example The inventor prepared the upper plate and the lower plate of the flat box as shown in FIG. 15 by installing an electrolytic copper foil with a thickness of 0.1 mm, and then setting a gathering net thereon. , So that a thick net is inserted between two fine nets, as shown in Figure 17. 5Hai flat box to generate three types of flat heat conversion device, as shown in the following table 1. The coarse mesh and fine mesh form one (example one) ------ main direction secondary direction form two (example two) main direction main Direction form three (example three) ------ one direction main direction ----_ example one, example two and example three The width, length and height are respectively 120 mm, 50 mm and 1.3 mm, And, the net used is a copper curtain net with 23 200523518 at least 99% copper. The coarse mesh has a wire diameter of 4 mm, a mesh thickness of 0.41 mm and a mesh number of 15; the fine mesh has ~ a wire diameter of d (U1 mm, a mesh thickness of 0.22 mm and a The number of nets is 100. The upper and lower plates of the flat box are sealed by changing the binary bonding force of acrylic (HARDL0CTH, manufactured by Japan DEMA). Before the working solution = two injections, the inside of the flat box A rotary vacuum pump and a diffusion vacuum pump were used to press f 1.0 * 10-7 torr, and then the flat box was filled with working distilled water, and then sealed. 彳, — in the above After this example 1, example 2 and example 3, a copper heat source with a visibility and a length of 12 mm, respectively, belongs to the right side of the upper plate of the flat box of each example, and is-installed in each-example The right part of the upper plate of the flat box is shown in Figure 17. After that, the heat sink is forcibly used, cooled. In this state, the measured center temperature of the heat source is to supply energy to This heat source, and the thermal resistance of each example is based on the following equation two Is calculated, and the figure 24 is the calculation result. Equation 3 Input Energy

Red, thermal resistance = (T measurement temperature-T Zhoushang, Pi Ling read the twenty-fourth figure, which can be found in Example 2, the main direction of the fine mesh and the thick = both are parallel to the thermal conversion Direction, the best thermal transfer = j this. Except 'This example one shows better heat conversion performance than example three, ^' It should consider the direction of the coarse mesh to provide the thermal conversion performance over the fine mesh ::: advantages Therefore, according to the heat conversion device of the present invention, its ',,, gas' discharge and liquid flow systems are optimized, and it can be an optimal choice as a heat conversion unit for cooling electronic equipment. 24 200523518 However, The above is only a detailed description of the best implementation of this creation—the detailed explanation of the money style, but the material of this book is limited to this, and the embodiment of the patent and its similar changes = this: In the materials, anyone who is familiar with the art in this creation :; :: Changes or modifications that can be easily considered can be covered in the following case '[Simplified illustration of the diagram] f—The diagram is of the conventional flat heat transfer device Partial schematic diagram; == another flat heat conversion device-sectional view of the embodiment Structure m2 for heat transfer placement of thousands of plates-the coarse grid absorption network of the preferred embodiment: two: flat plate heat conversion device-the layout of the fine grid absorption plate of the preferred embodiment-the implementation of the direction of the absorption network For example, the steam dissipating party formed on the net by 1 Zhuzhi & the eighth picture is a side view of the original flat plate heat-transformation skirt; the view is-the steam dissipating formed on the net = good implementation Example is a cross-sectional side view of the liquid film forming the ninth picture series of the flat-panel heat-converting device; ^ Tenth picture of the known example of the shellfish _ flat plate change hi like ninth picture with liquid 25 200523518 Plane view of the grid of the film; Figures 11 to 13 are perspective views of different appearances of the original plate heat conversion device; Figures 14 to 16 are the original plate heat conversion device. A cross-sectional view of a different flat box example of a flat-plate thermal conversion device; a seventeenth view is a cross-sectional view of another embodiment of the present flat-plate heat conversion device; a eighteenth view is a cross-sectional view of another embodiment of the present flat-plate heat conversion device; tenth Nine pictures is the original flat heat conversion device. Figure 20 is a sectional view of another embodiment of the present invention; Figure 21 is a sectional view of another embodiment of the flat plate thermal conversion device of the present invention; Figure 22 is a twenty-first figure A cross-sectional view taken along the line BB; in the twenty-third figure is a cross-sectional view taken along the line CC in the twenty-second figure; and the fourteenth figure is in many embodiments of the flat panel thermal conversion device of the present invention. The graph of the experimental results of the evaluation of the thermal conversion efficiency of the flat panel and the conversion device. [Explanation of the symbols of the main components] Cooling unit 10 Heat source 20 Radiator 30 Internal space 40 Thin metal box 50 Capillary structure 60 Cooling fan 70 Flat heat conversion Device 10026 200523518

Heat source 110 Cooling unit 120 Flat box 130 Upper plate 130a Lower plate 130b Gathering mesh G Fine mesh 140 Upper fine mesh layer 140H Lower fine mesh layer 140L Fine mesh layer 140M Intermediate mesh layer 140, additional intermediate mesh layer 140 ”Coarse mesh 150 Vapor dissipation Channel Pv Liquid film 170 Vapor flow space 200

27

Claims (1)

200523518 10. Scope of patent application: ^ A flat heat conversion device, one end of which is connected to a heat source and the other end of which is connected to a heat dissipation unit. The device converts thermal energy from the heat source to the heat dissipation unit in the horizontal direction, which includes: A heat conduction flat box, which contains the evaporation of the working solution absorbed from the heat source, and condenses and dissipates heat to the heat dissipation unit; and / or a gathering net, which is installed in the heat conduction flat box so that The nets are laminated vertically up and down and are installed in the heat-conducting flat box; wherein the coarse nets provide primary and secondary vapor dissipation with different cross-sectional areas at each intersection. A passage for allowing steam to flow therethrough, the main direction steam dissipating passage parallel to the heat transfer direction having a larger cross-sectional area; the coarse mesh system providing a main direction and a sub-direction vapor dissipating passage; A liquid flow path is provided along each intersection of the network lines. 2. As described in the application of the flat plate thermal conversion device described in item 丨, and the open π width of the thick net [M = (Bu Nd) / N, where N is the number of nets and d is the wire diameter (inches) )] Between 1.9 and 2.0 mm. 3. As described in the flat heat conversion device described in item 丨 of the patent application scope, the thick mesh in the basin has a wire diameter of between .17 to Q. 5 mm. "4. The flat heat conversion device as described in item No. of the patent scope, the thick mesh in the basin has an opening area of between -2 square meters to 4 square millimeters. The plate heat conversion device, / 5, 5 coarse mesh is based on the American Society for Testing and Testing (ASTM) E-ll-95 standard 28 200523518, and has a number of 10 to 60 meshes. 6. As the fourth patent application scope The width of the opening of the fine mesh described in the plate [M = (i-Nd) / N, 苴 // ,,, set a middle ^ λΊ A where N is the number of nets, and d is the line acre (奂 inches)] is between 0 · 019 to 0.18 mm. Straight k 7. The flat heat conversion device as described in item 丨 of the patent claim, the fine mesh has a wire diameter between 0.02 and 0.16 mm.-8 The flat heat conversion device as described in item 1 of the scope of patent application. The fine mesh has-New Zealand 0._6 square millimeters of square millimeters. ^ 9. The heat transfer of the flat plate as described in the application item i, and the fine mesh is based on the American Society for Testing and Materials Specification (ASTM) E-11 -95 ^ rule, with 80 to 400 meshes. '10. The flat heat conversion device described in item 1 of the scope of the patent application, wherein the gathering network is from bottom to top H includes the fine network is disposed adjacent to the heat source, and the The laminated coarse mesh is arranged adjacent to the heat dissipation unit. 11. The flat heat conversion device described in item 1 of the scope of the patent application, in which the Zhongnong δ and 5 Xuan I collection network system facilitates the insertion of the coarse mesh between the two layers of fine mesh. 12. The flat-plate thermal conversion device described in item 11 of the scope of the patent application, wherein y k is provided for inserting a portion of the coarse mesh between the two fine meshes and an extra fine mesh to interconnect the fine meshes to create a liquid channel. 13. The flat heat conversion device described in item 1 of the scope of patent application, wherein the gathering net further comprises at least one intermediate net, the number of nets of which is relatively more than the number of nets of the coarse net and less than that of the fine nets. Net number. 29 200523518 14. The flat heat conversion device according to item 13 of the scope of patent application, wherein the coarse mesh is laminated between the fine mesh and the intermediate mesh. 15. The flat-plate thermal conversion device as described in item 14 of the scope of the patent application, which provides at least a small fine mesh inserted between the fine mesh and the intermediate mesh-part of the coarse mesh-in order to interconnect the fine mesh with the The intermediate network creates a channel. That is, the flat heat conversion device as described in item 14 of the scope of patent application, and at least the intervening between the fine mesh and the intermediate mesh is provided-part of the coarse mesh has an additional intermediate mesh to interconnect the fine mesh. A channel is created with the intermediate network. θ, 17, The flat-plate heat-conversion device as described in item 14 of the scope of application for patent, wherein the fine mesh is arranged adjacent to Laiyuan, and the intermediate mesh is arranged adjacent to the heat dissipation unit. 18. The flat heat conversion device as described in item 14 of the scope of patent application, and the fine mesh is arranged adjacent to the heat source to make the worker absorb heat from the heat source; the solution evaporates into vapor; A channel connected to the _, ⑽ lifting is provided; 〃, lice machine-wherein, the intermediate network is provided to be connected to the coarse network and adjacent to the scattered element so as to provide the vapor condensation to the heat dissipation unit. 19. The flat heat conversion device according to item 18 of the scope of the patent application, wherein the intermediate mesh has a vapor flow space, so that the radon gas k is introduced from the coarse mesh into the vapor flow space. 20, According to the patent application, the flat heat transfer device described in the factory item further includes a ruler-capillary structure, which is arranged to connect to the gathering net and is arranged under the gathering net. 30 200523518 The capillary structure has unevenness Flowed through it and allowed the working solution to be contained and networked. The straw is absorbed by the radon heat source to evaporate, and flows to the polymer. As described in the patent application, the capillary structure is made of sintered copper and no conversion device. The second one is: ==: =; =-, which is formed by nickel or aluminum plate. ^ —Silic acid, copper, stainless steel, Zhongge, the flat plate heat conversion device described in item 1, which is the same as: Same power: ― Conversion device tHH1 / item 23—The plate heat of the ship 9, 9 Made of metal, polymer or plastic. The metal; two special stainless steel, molybdenum or alloys of these metals. Conversion device, any one of the items 1 to 23, the plate heat generation. 、, /, ο…, the conductive flat box is made of metal, polymer or plastic27. The flat heat conversion clothes as described in item 2β of the patent application scope, its i belongs to copper, | g, stainless steel , Platinum or an alloy of these metals. The light plate is the flat-panel heating device as described in any one of items 1 to 23 of the scope of the Chinese patent, wherein the working solution is water, ethanol, ammonia, methanol, nitrogen, or fluorodifluoromethane. 29. The flat plate heat conversion device described in item 28 of the scope of application for patent, wherein the total amount of the working solution in the year of 2005 200518 when the farm is full is 80% to 150% of the pores. 30. The flat-plate thermal conversion device according to any one of claims 1 to 23 of the Chinese Patent Application, wherein the fine mesh has primary and secondary liquid flow channels with different wearing areas; wherein the primary direction liquid flows The channels are parallel to the thermal transition direction. 3. The flat-plate heat conversion device as described in any one of the patent scope (13 to 19), wherein the intermediate mesh has primary and secondary liquid flow and moving channels with different cross-sectional areas; the primary direction liquid flow channel in Λ Department of parallel heat transfer direction. 32.- A method of changing the word board_changing device, which includes- a heat transfer flat box and a gathering net are arranged in the flat box, and by means of the gathering net, the working mechanism of the valley fluid circulation mechanism is horizontal The direction change heat includes the following steps: (a) forming the upper plate and the lower plate of the flat box respectively; (b) preparing a gathering net with a thick net structure, the net wires of which are interlaced with each other to provide steam Dissipation channels; and fine mesh wires are interlaced and weaved with each other to provide liquid flow channels, which are formed into thin sheets opposite to each other perpendicularly. At each intersection of the coarse wires, the main directions with different cross-sectional areas The vapor dissipating channel in the secondary direction allows the evaporated vapor to flow therethrough from the working solution; (c) Insert the gathering net 'between the upper plate and the lower plate, and adjust the direction of the gathering net to make the coarse net The main direction of the evaporative dissipating channel is parallel to a heat transfer direction; 32 200523518 The solution hole is placed on the plate and the plate is displayed-a flat box, μ has-working (e) phase, the working solution is reduced after m 'is injected into the working material. ； The inside of money + 彳 目 ， 然 (〇 The flat box filled with the working solution is sealed. For example, in the method of the scope of patent application, in step ⑹, the manufacture of the plate heat conversion device = the main direction of the same cross-sectional area and the intersection of the second and main 々 mother network lines. The working solution flows through it, = the gas dissipating channel, so that the main direction of the evaporation of the steam is 1 times the liquid flow channel, and the gathering network is ready to make the / political channel.