TW563016B - Heat dissipating board with heat pipes and method for manufacturing the same - Google Patents

Abstract

A heat dissipating board with heat pipes comprises a plurality of heat pipes. Each heat pipes has at least a continuous wedging passage parallel to corresponding heat pipe. The wedging passage has an acute portion (V-shape channel) with liquid medium for capillary flow and also has a radiative portion for movement of gaseous medium.

Description

563016

[Field of the invention] And there is a:!, There is a heat sink with a heat flow duct, especially-a kind of, a heat sink with good heat dissipation effect and can be easily manufactured. [Previous technology] According to the press, the central processing unit and other electronics have controlled their temperature in an acceptable range. The way to use it is to heat the electronic element fan to supply air for heat dissipation, but there should be some space. The component will generate a load during operation, A 〇 ,, -35. Within the range to avoid crash or damage, the surface of the current part is equipped with a cooling fin and a cooling fan, which requires power consumption and accounts for two phases. The heat pipe of the heat transfer mechanism (heat pipe) has hundreds of times stronger heat transfer capacity than copper metal pipes of the same size, and uses two-phase heat transfer liquid in the heat pipe for heat conduction without power consumption. As a heat sink for electronic components, it is known that a heat pipe forms a metal mesh within the pipe as a capillary structure of the heat pipe. However, its disadvantage is that it is too difficult to manufacture and the cost is too high to be popularized. In order to reduce costs, a conventional method for manufacturing a heat sink using a number of heat pipes is proposed. For example, the invention patent case No. 384424 of the Republic of China ^ heat pipe nameplate manufacturing process, the manufacturing method of the aluminum plate includes at least printing on the surface of a plate. The distribution path of the heat pipe and the expansion process of the heat pipe path. Obviously, the manufacture of a heat sink with a heat pipe in this method has the following disadvantages. The first is that the printing ink cannot be completely removed and communicates with the two-phase heat transfer liquid or the capillary structure in the heat pipe. Incompatibility affects the heat transfer effect. Secondly, because the heat & tube path must be expanded, the groove-shaped capillary structure in the heat pipe cannot be controlled, which affects the heat transfer effect again. 563016 Case number 89117484

V. Description of the invention (2) [Objective and summary of the invention] The first object of the present invention is to provide a heat radiating plate with a heat flow duct. The heat flow guide has at least one wedge-shaped channel for two-phase heat transfer working material to flow, so that Good heat dissipation effect. The second object of the present invention is to provide a heat flow duct. The heat flow duct has at least one wedge-shaped channel for two-phase heat transfer working material to flow, so as to have a good heat conduction effect. A second object of the present invention is to provide a method for manufacturing a heat radiation plate with a wedge-shaped heat flow pipe, and a flat plate is welded to an irregular plate with a heat flow pipe by a wheel pressing method, so that a large number of simple heat radiation plates can be manufactured without changing the inside thereof. The shape of the wedge channel. The heat-dissipating plate with heat-flow ducts of the invention includes a number of heat-flow ducts, and each tube has at least one continuous wedge-shaped channel, wherein the wedge-shaped channel is in the same direction as the guide, and the angled part of the wedge-shaped channel (V-shaped angle groove The shape of the flow channel of the working material, the radiation part of the wedge-shaped channel forms the flow channel of the f-state working material. In addition, the heat sink can be formed by welding the upper and lower plates. A wedge-shaped channel can be formed at the joint of the two plates, bent from the plate, or a flat plate, a corner plate, or a plurality of V-shaped angle slots can be inserted and fixed in the tube. The strips form a plurality of wedge-shaped channels. w In the manufacturing method of the heat radiation plate with heat flow duct of the present invention, firstly take a flat plate to obtain a corrugated lower plate by stamping or rolling, and the lower plate has several wedge-shaped heat flow duct paths, and Weld the other plane »into a heat flow duct with a shaped channel 'to close each of the Φ ,,, γ — 鳊 openings of each heat flow duct, and then inject an appropriate amount of two-phase heat transfer working substance,

563016 __Case No. 89117484 ___ ^ V. Description of the invention (3)

R: Correction After vacuuming again, the opening at the other end of each heat flow tube is closed to obtain a heat sink with a heat flow tube. [Explanation of the invention] Please refer to the attached drawings to illustrate the present invention by the following embodiments: As shown in Figs. 1 and 3, it is a first embodiment of a heat dissipation plate with a heat flow duct according to the present invention. The heat dissipation plate 20 It includes several heat flow pipes 23 (or heat pipes). In this example, each heat flow pipe 23 is a wedge-shaped pipe and is arranged parallel to each other. As shown in Figures 3 and 4, a continuous and The wedge-shaped channel 10 in the same direction of the duct 23 is filled with two-phase [liquid-phase] heat-transmitting working substances 13, 14 (working medium). The working substance is a substance with a large vaporization potential. , Such as water, two-gas difluoromethane, ammonia, acetone, methanol, or mercury, etc., and the wedge-shaped channel 10 is divided into an angle portion 11 and a radiation portion 12, wherein the angle-shaped portion 11 of the wedge-shaped channel 10 is V-shaped The acute angle grooves form a flow channel of the liquid working substance 13 for use as a capillary structure of the heat flow conduit 23, and the radiation portion 12 of the wedge-shaped channel 1 p forms a flow channel of the gaseous working substance 14. As shown in FIG. 4 'When one end of the heat flow conduit 23 (high temperature on the left-hand side) is heated, the liquid working substance 13 at the angle 11 of the end is heated to vaporize and evaporate to a gaseous working substance 14. At this time, the The gaseous working substance 14 flows with heat through the radiating part toward the wedge-shaped channel 10 and flows to the other end of the heat flow conduit 2 [the low temperature on the right-hand side] and gradually cools and condenses into a liquid working substance 1 3 ′ due to capillary action The liquid working substance i 3 is caused to flow counter-gravity at the angled part 11 of the wedge-shaped channel 10 from the other end [right-hand side] to one end [left-hand side] in an opposite direction, and the evaporation liquid is replenished.

563016 --------- Case No. 89117484 __Year Month Day_Amendment __ V. Description of the Invention (4) The shaped channel 10 conducts heat without power within 0, because the liquid working substance 3 is in the wedge channel The internal flow of the angled part 1 of 1 10 has a much faster flow rate than the capillary structure made of the conventional thick mesh surface formed by metal mesh (mesh), fiber tube and metal sintering (j metal). Define R ξ ^ t / q according to thermal resistance, where r represents thermal resistance, at represents temperature difference, and Q represents heat transferred. Therefore, the heat sink 20 has a fast thermal conduction effect and a low thermal resistance. In addition, The gaseous working substance in the heat flow conduit 23, the 4 g moving channel (that is, the radiation part of the wedge-shaped channel 10, 2), and the liquid working substance κ

The flow channel (that is, the angled part of the wedge channel 丨 0 丨 丨) is located between the angled part 11 and the radiation part 12 of the wedge-shaped through seam 10, so that the two-phase working Lebe has a smaller contact surface, so When the working material transfers heat, the liquid working material flowing at the angled part 11 of the wedge shape is much smaller than the conventional round open heat pipe, which has a very small resistance to the gaseous working material flowing in the opposite direction. Therefore, it can provide a faster speed. Liquid flow and not easily blocked. As shown in Figures 1 and 2, it is the manufacturing method of the above-mentioned heat sink 20. Figure = First, a) Take a flat plate, where the flat plate is made of a material with high thermal conductivity compatible with the working substance, such as aluminum and copper. , Stainless steel, nickel or titanium, etc.

[Pressing] or rolling [rolling] method to obtain a corrugated lower plate 22, the lower plate 22 has a number of wedge-shaped heat flow conduits, and then welded to another-plane upper plate 21 to form a rod shape; No .: Flow guide 23'Welding welding methods include wheel welding (such as the first and lower roller 32), butt welding, laser welding, plasma welding, argon welding, soil = welding methods, so that the upper plate 21 and the lower plate 22 does not affect ± or obstructs when combined ~ oath changes heat flow conduit 2 [

563016 _____ Case No. 89117484 Amended 5. Shape of the invention description (5); c) Close one of the openings of each heat flow duct 23, and then inject an appropriate amount of the two-phase heat transfer working substance 丨 3; then evacuate Rear; d) closing the other end opening of each heat flow conduit 23. In this way, the heat radiation plate 20 is obtained. Therefore, the heat radiation plate 20 of the non-circular heat flow tube 23 can be simply manufactured in a large amount without changing the shape of the wedge-shaped channel 10 in the heat flow tube 23 by the method for manufacturing the heat radiation plate 20 described above. In fact, the heat-radiating plate with a heat-flow duct according to the present invention is not limited to only one wedge-shaped channel 10 in each heat-flow duct, and may have more than one wedge-shaped channel 10 under different designs. As shown in FIG. 5, it is a second embodiment of the heat dissipation plate of the present invention. The heat dissipation plate 40 is composed of an upper plate 41 and a lower plate 42, wherein the upper plate 41 is a flat plate and the lower plate 4 2 It is a wavy S-plate. When the two plates are combined, several heat flow ducts 4 3 are formed. Each heat flow duct 4 3 forms two angled portions 11 at the junction of the upper and lower plates 4 1 and 4 2 as a liquid working substance.丨 3 flow channel 'and the mother-heat flow tube 4 3 forms a radiation site 12' at the bottom of the arc of the lower plate 4 2 as a flow channel for the gaseous working substance 14, so the heat-dissipation plate 40's mother-heat flow tube 4 3 Can provide a larger liquid working material flow. As shown in FIG. 7, it is the third embodiment of the heat sink of the present invention, and the heat sink 50 is composed of an upper plate 51, a lower plate 5 2 and a number plate 5 4 (as shown in FIG. 6). The upper plate 51 is a flat plate, and the lower plate 52 is a wave plate with a plurality of trapezoidal angle grooves (that is, heat flow pipes 53). After the two plates are combined, each trapezoidal angle groove is inserted to fix the Corner plate 54 so that the cross section of each heat flow duct 53 forms a w-shaped duct with upper and lower covers, and forms three wedge-shaped passages

563016 Case No. 891174M. V. Description of the invention (6) Channel 10, each wedge flow channel, large liquid working. The shape channel 10 of the invention therefore the bulk material 1 3 flow heat flow conduit in a single heat flow conduit. As shown in the fourth embodiment in FIG. 8, the single hot fluid 62 is fixed to the circular pipe 6 1 10 for working efficiency. As shown in the figure, each of the heat flow ducts 5 3 of the axis 61 in the duct 61 and the angled part 11 where the material acts forms a liquid working substance 1 3 hot plate 5 0 can provide a relatively large momentum. In addition to being applicable to the above-mentioned heat dissipation plate, the first duct 60 in the form of a single heat flow duct according to the present invention is also composed of a circular duct 61 and a strip 6 2 having eight v-shaped angle grooves 6 3 and is inserted into this When the bottom of each V-shaped angle groove 63 is facing, the heat flow duct 60 forms eight wedge-shaped channels. Therefore, it is necessary to understand that the manufacturing is simple and the heat conduction is good. The preferred embodiment is defined as the enumeration of the present invention, and the scope of the patent is to be defined. ^ The scope of protection of the present invention shall be deemed to be attached to the spirit and rm standard of the present invention. Anyone who is familiar with this technology will not depart from it. The scope of protection of the invention. & changes and modifications

Page 9563016 Case No. 89117484 Brief description of the modified diagram [Illustration of the diagram] Figure 1: A perspective exploded perspective view of the first embodiment of the heat sink of the present invention, Figure 2: The first of the heat sink of the present invention The schematic diagram of the welding and pressing state of the embodiment, FIG. 3: Cross-sectional view of the first embodiment of the heat sink of the present invention; FIG. 4: The heat dissipation condition of the wedge-shaped channel in the heat flow duct of the heat sink of the present invention is not intended, FIG. Figure: Sectional view of the second embodiment of the heat sink of the present invention; Figure 6: Perspective view of the corner plate element of the third embodiment of the heat sink of the present invention, Figure 7: Third embodiment of the heat sink of the present invention Sectional view; and FIG. 8: a sectional view of a fourth embodiment of the heat flow conduit of the present invention. [Illustration of the drawing number] I 0 Wedge-shaped channel II The angled part [V-shaped groove] 1 2 Radiation part 1 3 Liquid working substance 1 4 Gaseous working substance 20 Radiating plate 21 Upper plate 22 Lower plate 23 Heat flow duct 31 Upper roller 32 Lower roller 4 0 heat radiation plate 41 upper plate 42 lower plate 43 heat flow pipe 5 0 heat radiation plate 51 upper plate 52 lower plate 53 heat flow pipe

Page 10 563016 _Case No. 89117484_ Year, Month, Date, Amendment Brief description of the drawing 54 Corner plate 6 0 Heat flow duct 61 Round duct 62 Strip 63 V-shaped angle groove

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Claims (1)

563016 ___Case No. 891174S4 i ~ L Yuehong_ VI. Scope of patent application [Scope of patent application] 1. A heat-radiating plate with heat-flow ducts, which includes several heat-flow ducts, each heat-flow duct has at least one continuous wedge-shaped channel, The wedge-shaped channel is in the same direction as the catheter, and the wedge-shaped channel has an acute angle included portion, which is filled with a liquid working substance for the liquid working substance to flow. The liquid working substance does not fill the wedge-shaped channel, and the The wedge-shaped channel has a radiation site for the flow of gaseous working substances. 2. The heat sink according to item 1 of the scope of the patent application, wherein each heat flow duct is arranged parallel to each other. 3. The heat dissipation plate according to item 1 of the scope of the patent application, wherein the heat flow conduit is a wedge-shaped tube. 4. The heat dissipation plate according to item 1 of the scope of the patent application, wherein the heat flow conduit is a polygonal tube. 5. The heat dissipating plate according to item 4 of the scope of the patent application, wherein the heat-conducting pipe is a quadrangular pipe, and the pipe is radiated with a Digusto corner plate, and the heat-conducting pipe forms three continuous wedge-shaped channels. 6. A heat radiating plate with a heat pipe, comprising a plurality of heat flow ducts. Each heat flow duct forms at least one V-shaped acute angle groove in the same direction as the heat pipe, and serves as the capillary structure of the heat pipe, and has a liquid in the V-shaped acute angle groove. The working substance is not filled in the v-shaped acute angle groove. 7. A heat flow duct having at least one continuous wedge-shaped passage in the tube, wherein the wedge-shaped passage is in the same direction as the duct, and the wedge-shaped passage has an acute angle and cool angle portion, which is filled with a liquid working substance for the liquid working substance Flow, the liquid working substance does not fill the wedge-shaped channel, and the 563016 _ Case No. 89117484 The scope of patent application of the wedge channel has a radiation part for the flow of gaseous working substances. . 8: The heat flow guide according to item 7 of the scope of patent application, wherein the heat flow conduit is a wedge-shaped tube. 9. The heat flow conduit according to item 7 in the scope of the patent application, wherein the heat flow conduit is a polygonal tube. 〇 The heat flow conduit according to item 9 of the patent application scope, wherein the heat flow conduit is a quadrangular tube, a corner plate is fixed in the tube, and at least three continuous wedge-shaped channels are formed in the heat flow conduit. The heat flow conduit described in item 7 of the 11-lead patent scope, wherein the heat flow = shaped tube, and a tube with a plurality of V-shaped angle slots is inserted and fixed in the tube to form a plurality of continuous objects in the heat flow conduit #, g 、 音 _1 r ΐ1 Please refer to the heat flow duct described in item 11 of the patent scope: the vu-shaped angle: the bottom of the groove faces the circular heat flow duct: two • middle mother-ν kinds of heat are all formed in the tube at least one With the stern tube as the capillary structure of the heat pipe, and the two-way V-shaped acute angle ", it is not filled in the V-shaped acute angle groove. Step Γ, the manufacturing method of the official heat sink includes at least the downcomer Road 2 pressure or rolling method will form a flat plate with several heat flow inner shapes = welding the obtained plate to another flat plate, and each heat flow tube will form at least one continuous wedge-shaped channel; Open at one end, inject two-phase heat Page 13 563016 Case No. 89117484 Amendment VI. Working substance passed in the scope of patent application; d) Seal the opening at the other end of each heat flow conduit. 15. The manufacturing method according to item 14 of the scope of patent application, wherein the method further includes a step: inserting and fixing a flat plate, a corner plate or a strip with a plurality of V-shaped angle grooves in each heat flow duct. Objects to form multiple continuous wedge-shaped channels. feci Page 14