CN101295685B - Heat pipe and manufacturing method thereof - Google Patents
Heat pipe and manufacturing method thereof Download PDFInfo
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- CN101295685B CN101295685B CN2007101024554A CN200710102455A CN101295685B CN 101295685 B CN101295685 B CN 101295685B CN 2007101024554 A CN2007101024554 A CN 2007101024554A CN 200710102455 A CN200710102455 A CN 200710102455A CN 101295685 B CN101295685 B CN 101295685B
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Abstract
The invention provides a heat conductive tube and a manufacture method thereof; the heat conductive tube comprises a tubular body, a cavity and a porous capillary diversion layer; the tubular body is provided with a first cut and a third cut; the cavity is provided with a second cut; the first cut and the second cut are sealed and jointed so as to form a semi-finished heat conductive tube; the semi-finished heat conductive tube is pumped from the third cut; finally the third cut is sealed to form the heat conductive tube; wherein, the porous capillary diversion layer is formed in the heat conductive tube; a working liquid is arranged in the semi-finished heat conductive tube before or after pumping. One section area of the cavity is larger than that of the tubular body; besides, the cavity is provided with a flat end so as to lead the heat conductive tube to be provided with more heating components on the flat end.
Description
Technical field
The present invention relates to a kind of heat pipe (heat pipe) and manufacture method thereof, particularly a kind of heat pipe and manufacture method thereof that supplies LED heat radiating to use.
Background technology
Along with development of science and technology, the technology of many electronic products, all the problem because of heat radiation can't break through.For example, central processing unit (CPU) produces a large amount of heats when operation, and these heats will exert an adverse impact to the operation of whole system as not being discharged from.And heat pipe plays an important role in the radiator portion of central processing unit (CPU).Especially in the narrow and small day by day electronic installation of free space, the heat abstractor that can efficiently radiates heat makes full use of the space simultaneously seems even more important.
Thereby existing heat pipe radiating mode is to form a thermal conductive surface by interspersed several heat pipes in a metal medium on described metal medium mostly.Yet the heat that electronic building brick produced that is installed on the described thermal conductive surface need pass through described metal medium, could conduct to described heat pipe indirectly, therefore utilize this radiating mode, its radiating efficiency will be subject to the physical property and difficult raising of described metal medium.If described electronic building brick directly is installed on the described heat pipe, then, can't carry the relatively large electronic building brick of diameter or the electronic building brick of clustering because the diameter of the heat pipe in the general electronic installation is limited.If directly use heating panel (vapor chamber), though can solve the narrow and small problem in setting area, still the device that still need add to be to discharge heat from described soft copy, for example fin.And, the space that above-mentioned heating panel and fin thereof are required, the electronic installation less for idle space, still excessive.
Therefore, how a kind of heat pipe and manufacture method thereof with different cross-sectional is provided, can provide effectively the electronic building brick of electronic building brick with big heating area or clustering and rapidly radiating mode become one of researcher's problem demanding prompt solution to address the above problem.
Summary of the invention
The object of the present invention is to provide a kind of heat pipe and manufacture method thereof that has different cross-sectional and be used for LED heat radiating.
For reaching above-mentioned purpose, heat pipe provided by the invention comprises a body, a cavity and a porous capillary water conservancy diversion layer.Described body has one first opening, and the diameter of described body is less than 10mm.Described cavity has one second opening, and described second opening is connected with described first opening, and described thus body and described cavity form a seal cavity.Described porous capillary water conservancy diversion layer is formed at the inside of described body and described cavity.Wherein said seal cavity holds a working fluid, and described cavity perpendicular to a sectional area of described body bearing of trend a sectional area perpendicular to described body bearing of trend greater than described body, wherein said body in the length of its bearing of trend greater than the length of described cavity in described body bearing of trend.
In one embodiment, described body and described cavity are formed in one.In another specific embodiment, described cavity is made of a groove and a loam cake.Described loam cake is connected with described groove and has described second opening.It is made that described groove can pass through a powder metallurgical technique, a Sheet Metal Forming Technology, a jetting formation process, a casting technique or a mechanical processing technique.In one embodiment, described cavity has a flat end, can place for general electronic building brick.
In one embodiment, described porous capillary water conservancy diversion layer can be coated with metal dust or other similar metal powder sintered forming of copper, nickel or silver by a copper metal powder end, a nickel metal powder, a silver metal powder, a surface.
In another specific embodiment, described porous capillary water conservancy diversion layer comprises a metallic particles layer and a metal dictyosome.Described metallic particles layer thermal sintering is on the inwall of the inwall of described body and described cavity, and described metal dictyosome is arranged on the described metallic particles layer.
In another specific embodiment, described porous capillary water conservancy diversion layer comprises a wavy crape folding hardware cloth and a flat metal scrim layer, described wavy crape folding hardware cloth is laid on the inwall of the inwall of described body and described cavity, and described flat metal scrim layer is arranged on the described wavy crape folding hardware cloth.The shape of the wavy crape folding of wherein said wavy crape folding hardware cloth can be triangle, rectangle, trapezoidal or waveform.
In another specific embodiment, described porous capillary water conservancy diversion layer comprises several tiny indentations, is formed on the inwall of the inwall of described body and described cavity.
In another specific embodiment, described porous capillary water conservancy diversion layer comprises several tiny indentations and a metal sintering layer, described tiny indentation is formed on the inwall of described cavity, and described metal sintering layer is formed on the inwall of described body and with the welding mutually of described tiny indentation.
Heat pipe manufacture method provided by the invention comprises the following step: a body (a) is provided, has one first opening and one the 3rd opening; (b) provide a cavity, have one second opening; (c) first opening of described body and second opening of described cavity are carried out sealed engagement, to form a semi-finished product heat pipe; (d) described semi-finished product heat pipe is bled; And (e) sealing described the 3rd opening.The inwall of wherein said semi-finished product heat pipe comprises a porous capillary water conservancy diversion layer, described semi-finished product heat pipe holds a working fluid, described cavity perpendicular to a sectional area of described body bearing of trend a sectional area perpendicular to described body bearing of trend greater than described body.And described working fluid injected in the described semi-finished product heat pipe before or after step (d).In addition, the described sealed engagement of step (c) is a welding procedure, a fusion joining process, a mechanical snapping technology or a gluing technique.
Heat pipe step of manufacturing provided by the invention (b) can comprise: a groove is provided; One loam cake is provided, and described loam cake has described second opening; And described loam cake is connected with described groove, to form described cavity.It is made that described groove can pass through a powder metallurgical technique, a Sheet Metal Forming Technology, a jetting formation process, a casting technique or a mechanical processing technique.And can be formed with one first sintered metal layer on described groove, cover on described and be formed with one second sintered metal layer, described first sintered metal layer is connected with described second sintered metal layer.Or on described groove, be formed with one first several tiny indentations, and covering on described and be formed with one second several tiny indentations, described first several tiny indentations are connected with described second several tiny indentations.Again by engaging with described body to form described porous capillary water conservancy diversion layer.
In one embodiment, be formed with the metal bisque of a sintering on the inwall of described cavity.Described porous capillary water conservancy diversion layer is formed by the following step: with a center bar in described the 3rd opening inserts described semi-finished product heat pipe and roughly near the metal bisque of described sintering; Between described center bar and described semi-finished product heat pipe, insert one first metal dust; Carry out a sintering process so that the metal bisque welding mutually of described first metal dust and described sintering, to form described porous capillary water conservancy diversion layer; And described center bar taken out from described semi-finished product heat pipe.
In another specific embodiment, have several tiny indentations on the inwall of described cavity.Described porous capillary water conservancy diversion layer is formed by the following step: with a center bar in described the 3rd opening inserts described semi-finished product heat pipe and roughly near described several tiny indentations; Between described center bar and described semi-finished product heat pipe, insert one second metal dust; Carry out a sintering process so that described second metal dust and described several tiny indentation weldings mutually, to form described porous capillary water conservancy diversion layer; And described center bar taken out from described semi-finished product heat pipe.In above-mentioned two specific embodiments, described first metal dust or described second metal dust can be metal dust or other the similar metal dusts that a copper metal powder end, a nickel metal powder, a silver metal powder, a surface are coated with copper, nickel or silver.
In another specific embodiment, described porous capillary water conservancy diversion layer utilizes a mechanical processing technique on the inwall of the inwall of described body and described cavity, makes several tiny indentations, to form described porous capillary water conservancy diversion layer.
In another specific embodiment, described porous capillary water conservancy diversion layer is formed by the following step: several metallic particles of sintering are on the inwall of the inwall of described body and described cavity; And a metal dictyosome is set on described metallic particles, to form described porous capillary water conservancy diversion layer.
In another specific embodiment, described porous capillary water conservancy diversion layer is formed by the following step: lay on the inwall that wavy crape folding metal is distributed in the inwall of described body and described cavity; And a flat metal scrim layer is set on described wavy crape folding hardware cloth, to form described porous capillary water conservancy diversion layer.
Another heat pipe manufacture method provided by the invention comprises the following step: one first body (A) is provided, has an openend and a blind end; (B) cavity and one second body that the described first body necking down is connected with formation, wherein said cavity comprises described blind end, and described second body comprises described openend; (C) described cavity and described second body are bled; And (D) seal described openend; The inwall of wherein said cavity and described second body comprises a porous capillary water conservancy diversion layer, described cavity and described second body hold a working fluid, described cavity perpendicular to a sectional area of described body bearing of trend a sectional area perpendicular to described body bearing of trend greater than described second body, wherein said body in the length of its bearing of trend greater than the length of described cavity in described body bearing of trend.Wherein step (B) is implemented in the scope of 400 to 600 ℃ of temperature.
In one embodiment, in step (A) afterwards, on the inwall of described first body, form described porous capillary water conservancy diversion layer.Described porous capillary water conservancy diversion layer is formed by the following step: insert one first metal dust in described first body; With a center bar in described openend inserts described first body and roughly near described first metal dust; Between the inwall of described center bar and described first body, insert one second metal dust; Carry out sintering process chin or cheek and make described first metal dust and the welding mutually of second metal dust, to form described porous capillary water conservancy diversion layer; And described center bar taken out from described first body.
Technique effect of the present invention is, a kind of heat pipe and manufacture method thereof with different cross-sectional is provided, the electronic building brick with big heating area or the electronic building brick of clustering can be set on the flat end of described heat pipe, and described electronic building brick radiating mode effectively and rapidly is provided.
Description of drawings
Fig. 1 is the sectional exploded view before the heat pipe of first preferred embodiment is not finished;
Fig. 2 A is the cut-away view of a semi-finished product heat pipe of described first preferred embodiment;
Fig. 2 B is the cut-away view that a center bar of described first preferred embodiment inserts described semi-finished product heat pipe;
Fig. 2 C is one first metal dust is inserted in described first preferred embodiment between described center bar and described semi-finished product heat pipe a cut-away view;
Fig. 2 D is the cut-away view of the described semi-finished product heat pipe of described first preferred embodiment;
Fig. 2 E is the cut-away view of the described heat pipe of described first preferred embodiment;
Fig. 3 A is one first opening of heat pipe of a specific embodiment and the partial cutaway diagrammatic sketch of one second opening;
Fig. 3 B is one first opening and partial cutaway diagrammatic sketch after one second opening engages of the described heat pipe of described specific embodiment;
Fig. 3 C is heat pipe one first opening of another specific embodiment and the partial cutaway diagrammatic sketch of one second opening;
Fig. 3 D is one first opening and partial cutaway diagrammatic sketch after one second opening engages of the described heat pipe of described specific embodiment;
Fig. 3 E is the cut-away view of the described heat pipe cavity of above-mentioned specific embodiment;
Fig. 4 A is the cut-away view of a semi-finished product heat pipe of one second preferred embodiment;
Fig. 4 B is the cut-away view that a center bar of described second preferred embodiment inserts described semi-finished product heat pipe;
Fig. 4 C is one second metal dust is inserted in described second preferred embodiment between described center bar and described semi-finished product heat pipe a cut-away view;
Fig. 4 D is the cut-away view of the described heat pipe of described second preferred embodiment;
Fig. 4 E is the cut-away view before the heat pipe of a specific embodiment is not finished;
Fig. 4 F is the cut-away view before the heat pipe of described specific embodiment is not finished;
Fig. 4 G is the cut-away view of the heat pipe of described specific embodiment;
Fig. 4 H is the cut-away view of cavity of the described heat pipe of above-mentioned specific embodiment;
Fig. 5 is the cut-away view of the heat pipe of one the 3rd preferred embodiment;
Fig. 6 is the cut-away view of the heat pipe of one the 4th preferred embodiment;
Fig. 7 is the section diagrammatic sketch of the heat pipe of one the 5th preferred embodiment;
Fig. 8 A is the cut-away view of one of heat pipe of one the 6th preferred embodiment first body;
Fig. 8 B is the cut-away view after the described first body necking down of described the 6th preferred embodiment;
Fig. 8 C is the section diagrammatic sketch of the heat pipe of described the 6th preferred embodiment;
Fig. 8 D is that described first body of described the 6th preferred embodiment is in the cut-away view of inserting one first metal dust;
Fig. 8 E is that the cut-away view of a center bar in described first body inserted in described the 6th preferred embodiment;
Fig. 8 F is one second metal dust is inserted in described the 6th preferred embodiment between described center bar and described first body the schematic diagram that cuts open; And
Fig. 8 G be described the 6th preferred embodiment described first body cut open schematic diagram.
Embodiment
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
See also Fig. 1, Fig. 1 is the sectional exploded view before the heat pipe 1 of the present invention's one first preferred embodiment is not finished.Described heat pipe 1 comprises a body 12, one cavitys 14.Described body 12 has one first opening 122 and one the 3rd opening 124.Described cavity 14 has one second opening 142 and a flat end 144.One sectional area of described cavity 14 is greater than a sectional area of described body 12.The sectional area of wherein said cavity 14 and body 12 refers to the sectional area perpendicular to the body bearing of trend of described cavity 14 and body 12 close described flat end 144, and this sectional area is perpendicular to the sectional area in the interior of articles space of body bearing of trend.The diameter of described body 12 is less than 10mm.
Shown in Fig. 2 A, with second opening 142 of described cavity 14 and first opening, 122 sealed engagement of described body 12, to form a semi-finished product heat pipe 16.Described sealed engagement can be a welding procedure, a fusion joining process, a mechanical snapping technology or a gluing technique.
Described first preferred embodiment has been formed with the metal bisque 182 of a sintering, shown in Fig. 2 A on the inwall of described cavity 14.After described sealed engagement, a center bar C1 is inserted in the described semi-finished product heat pipe 16 from described the 3rd opening 124, and roughly near the metal bisque 182 of described sintering, shown in Fig. 2 B.Between described center bar C1 and described semi-finished product heat pipe 16, insert one first metal dust 184 then, shown in Fig. 2 C.Described first metal dust 184 can be metal dust or other the similar metal dust that a copper metal powder end, a nickel metal powder, a silver metal powder, a surface are coated with copper, nickel or silver.
Shown in Fig. 2 D, then carry out a sintering process, so that metal bisque 182 welding mutually of described first metal dust 184 and described sintering, to form a porous capillary water conservancy diversion layer 18.At last described center bar C1 is being taken out in described semi-finished product heat pipe 16.Shown in Fig. 2 E, before with 124 sealings of described the 3rd opening, need described semi-finished product heat pipe 16 is bled, and inject a working fluid L1.It is commutative with the order of bleeding to inject described working fluid L1.For making the follow-up sealing can smooth implementation, can be before bleeding, earlier with 124 reducings of described the 3rd opening.At last, described heat pipe 1 after 124 sealings of described the 3rd opening is promptly finished.
It should be noted that described sealed engagement should avoid excessively damaging already present porous capillary water conservancy diversion layer.In described first preferred embodiment, the metal bisque 182 (seeing also Fig. 2 A) of second opening, the 142 no described sintering of described cavity 14, therefore described sealed engagement can take that the metal bisque 182 to described sintering causes damage in engaging process into account, for example uses general welding procedure or fusion joining process.But still it should be noted, after described sealed engagement, the inwall of the inwall of described cavity 14 and described body 12 should keep smooth connection as far as possible, so that the follow-up smooth sintering of first metal dust, 184 energy, and with metal bisque 182 welding mutually of described sintering, to form described porous capillary water conservancy diversion layer 18.
In addition, if the metal bisque 182 of the existing described sintering in second opening, 142 places of described cavity 14, the joint technology of use is restriction to some extent then, or service condition limits to some extent.For example, should not directly use fusion joining process or welding procedure in this embodiment.But can be by suitable bond layout, to use fusion joining process or welding procedure.See also Fig. 3 A, Fig. 3 A is the partial cutaway diagrammatic sketch of described first opening 122 of a specific embodiment and described second opening 142.Described first opening 122 comprises a composition plane 1222 and a welding position 1224.Described second opening 142 comprises a composition plane 1422 and a welding position 1424.Described composition plane 1222,1422 fits tightly mutually.Described welding position 1224,1424 is an inclined-plane.After described composition plane was fitted, described welding position 1224,1424 formed a groove, welds for filler.Shown in Fig. 3 B, after described sealed engagement is finished, only described welding position 1224,1424 is affected, be full of a scolder P on it, 1222,1224 of described composition planes are not affected, can keep the inwall smooth connection of the inwall and the described body 12 of described cavity 14 thus, and not damage the metal bisque 182 of the described sintering at described cavity 14 second openings 142 places.
In addition, see also Fig. 3 C, Fig. 3 C is described first opening 122 of another specific embodiment and the partial cutaway diagrammatic sketch of described second opening 142.Described first opening 122 comprises a composition plane 1222 and a welding position 1224.Described second opening 142 comprises a composition plane 1422 and a welding position 1424.Described welding position 1224,1424, it protrudes position 1224a, 1424a by one and a groove 1224b, 1424b form.After described composition plane was fitted, described composition plane 1222,1422 fitted tightly mutually, and described protrusion position 1224a, 1424a fuse mutually because of heating or other fusing mode, and fill up described groove 1224b, 1424b.After described sealed engagement is finished, only described welding position 1224,1424 is affected, 1222,1224 of described composition planes are not affected, the inwall smooth connection that can keep the inwall and the described body 12 of described cavity 14 thus, and do not damage the metal bisque 182 of described sintering at second opening, 142 places of described cavity 14, shown in Fig. 3 D.Dotted line circle among Fig. 3 D is represented the welding zone of described welding position 1224,1424.Certainly, if described first opening 122 and described second opening 142 are then above-mentioned because of the issuable influence of heat will not exist with bolt, but note the sealing of joint.
Merit attention is that in above-mentioned specific embodiment, shown in Fig. 3 E, described cavity 14 can comprise a groove 146 and a loam cake 148.Described groove 146 comprises described flat end 144, and described loam cake 148 comprises described second opening 142.Be formed with one first sintered metal layer 1822 on the described groove 146.Be formed with one second sintered metal layer 1824 on the described loam cake 148.Described groove 146 is connected with described loam cake 148, just forms described cavity 14, and described first sintered metal layer 1822 and described second sintered metal layer 1824 promptly form the metal bisque 182 of described sintering.In addition, can to pass through a powder metallurgical technique, a Sheet Metal Forming Technology, a jetting formation process, a casting technique or a mechanical processing technique made for described groove 146 housings itself.
See also Fig. 4 A, Fig. 4 A is the cut-away view before the heat pipe 2 of one second preferred embodiment is not finished.The production method of described heat pipe 2 heat pipe 1 with described first preferred embodiment substantially is identical, does not repeat them here.Only the mode that forms with regard to the porous capillary water conservancy diversion layer 28 of described heat pipe 2 is elaborated.
Shown in Fig. 4 A, have several tiny indentations 282 on the inwall of the cavity 24 of described heat pipe 2.Shown in Fig. 4 B, a center bar C2 is inserted in the semi-finished product heat pipe 26 from the 3rd opening 224 of the body 22 of described heat pipe 2, and roughly near described several tiny indentations 282.Shown in Fig. 4 C, between described center bar C2 and described semi-finished product heat pipe 26, insert one second metal dust again.Then carry out a sintering process, so that described second metal dust 284 and described several tiny indentation 282 weldings mutually, to form described porous capillary water conservancy diversion layer 28.Shown in Fig. 4 D, more described center bar C2 is taken out in described semi-finished product heat pipe 26 at last.And after described the 3rd opening 224 of sealing, form described heat pipe 2.
It should be noted that described its external diameter of center bar C2 not necessarily has only one, that is described center bar C2 may have different external diameters.See also Fig. 4 E, Fig. 4 E is the cut-away view before the heat pipe 2 ' do not finish of a specific embodiment.Compare with described second preferred embodiment, described heat pipe 2 ' cavity 24 ' several tiny indentations 282 ' present one and described heat pipe 2 ' the identical internal diameter of body 22 ' internal diameter, therefore a center bar that only has single outside diameter is can't satisfy simultaneously to be tight against described several tiny indentations 282 ' and in described center bar and described heat pipe 2 ' one semi-finished product heat pipes 26 ' leave the space to hold the requirement of the metal dust of adding afterwards.In this situation, one center bar C2 ' need have different external diameters, make a part of center bar C2 ' can be tight against described several tiny indentations 282 ' and in described center bar C2 ' and described heat pipe 2 ' leave space with hold second metal dust 284 that added afterwards ', and in follow-up sintering process, described second metal dust 284 ' can with described several tiny indentation 282 ' weldings mutually, with form a porous capillary water conservancy diversion layer 28 ', shown in Fig. 4 F.And at sealing described semi-finished product heat pipe 26 ' afterwards, form described heat pipe 2 ', shown in Fig. 4 G.
It should be noted that in above-mentioned specific embodiment, shown in Fig. 4 H, described cavity 24,24 ' can comprise a groove 246 and a loam cake 248.Described loam cake 248 comprises second opening 242 of described cavity 24.Be formed with one first several tiny indentations 2822 on the described groove 246.Be formed with one second several tiny indentations 2824 on the described loam cake 248.Described groove 246 is connected with described loam cake 248, just form described cavity 24,24 ', and described first several tiny indentations 2822 and described second several tiny indentations 2824 promptly form described several little thin indentations 282.In addition, can to pass through a powder metallurgical technique, a Sheet Metal Forming Technology, a jetting formation process, a casting technique or a mechanical processing technique made for described groove 246 housings itself.
See also Fig. 5, Fig. 5 is the cut-away view of the heat pipe 3 of one the 3rd preferred embodiment.The production method of described heat pipe 3 is identical with the described first preferred embodiment heat pipe 1 substantially, does not repeat them here.Only the mode that forms with regard to the porous capillary water conservancy diversion layer 38 of described heat pipe 3 describes.Described porous capillary water conservancy diversion layer 38 utilizes a mechanical processing technique on the inwall of a body 32 of described heat pipe 3 and on the inwall of a cavity 34 of described heat pipe 3, makes several tiny indentations 38 and forms.For example utilize cutter directly on the inwall of described semi-finished product heat pipe, to depict described several tiny indentations 38.Should note, in one embodiment, originally existing several the tiny indentations of the cavity of one semi-finished product heat pipe, therefore after sealed engagement, only need that several tiny indentations shapings are carried out at other position of described semi-finished product inner wall of heat pipe and can form a porous capillary water conservancy diversion layer, but note the linking of these two groups of tiny indentations.This kind cavity is more common in knockdown cavity, is for example combined by a groove and a loam cake.
See also Fig. 6, Fig. 6 is the cut-away view of one the 4th preferred embodiment heat pipe 4.The production method of described heat pipe 4 is identical with the described first preferred embodiment heat pipe 1 substantially, does not repeat them here.Only the mode that forms with regard to the porous capillary water conservancy diversion layer 48 of described heat pipe 4 describes.Elder generation's several metallic particles 482 of sintering are on the inwall of the body 42 of described heat pipe 4 and on the inwall of the cavity 44 of described heat pipe 4.Described metallic particles 482 is set again, to form described porous capillary water conservancy diversion layer 48 on a metal dictyosome 484.It should be noted that described several gold grains 482 can be sintered in the inwall of described body 42 and the inwall of described cavity 44 respectively.
See also Fig. 7, Fig. 7 is the cut-away view of one the 5th preferred embodiment heat pipe 5.The production method of described heat pipe 5 is identical with the described first preferred embodiment heat pipe 1 substantially, does not repeat them here.Only the mode that forms with regard to the porous capillary water conservancy diversion layer 58 of described heat pipe 5 describes.Lay a wavy crape folding hardware cloth 582 earlier on the inwall of the body 52 of described heat pipe 5 and on the inwall of the cavity 54 of described heat pipe 5.Put again and on a flat metal scrim layer 584, establish described wavy crape folding hardware cloth 582, to form described porous capillary water conservancy diversion layer 58.The shape of the wavy crape folding of wherein said wavy crape folding hardware cloth 582 can be triangle, rectangle, trapezoidal or waveform.
See also Fig. 8 A, Fig. 8 A is the cut-away view of first body 62 of the heat pipe 6 of one the 6th preferred embodiment.Described first body 62 has an opening 622 and a blind end 624.Described blind end 624 is smooth.Described first body 62 has bigger internal diameter, for follow-up necking down technology.And, because the tube wall of described first body 62 that is tightened in necking down technology, described tube wall will thicken after necking down, so in general the application, the wall thickness of the blind end 624 of described first body 62 is mostly than the thickness of pipe wall before the necking down, so that the wall thickness after the necking down is evenly whole.But should be as limit.
Follow a cavity 626 and one second body 628 that 62 necking downs of described first body are connected with formation, shown in Fig. 8 B.Wherein said cavity 626 comprises described blind end 624, and described second body 628 comprises described opening 622.One sectional area of described cavity 626 is greater than a sectional area of described second body 628.The sectional area of described cavity 626 is meant the sectional area of described blind end.In addition, the inwall of described cavity 626 and described second body 628 comprises a porous capillary water conservancy diversion layer 64.
Again described cavity 626 and described second body 628 are bled, and in described cavity 626 and described second body 628, inject a working fluid L2.At last again with described opening 622 sealings.It is commutative with the order of bleeding wherein to inject described working fluid L2.After described opening 622 sealings, described heat pipe 6 is promptly finished, shown in Fig. 8 C.
Described the 6th preferred embodiment, described necking down are to implement hot working in the scope of 400 to 600 ℃ of temperature, or implement hot working in interior scope for about 200 ℃ in the recrystallization temperature that is higher than described first body 62.In addition, described porous capillary water conservancy diversion layer 64 formed described porous capillary water conservancy diversion layer 64 on the inwall of described first body 62 before described necking down, and its step is as follows: insert one first metal dust 642 in described first body 62, shown in Fig. 8 D; One center bar C3 is inserted in described first body 62 and roughly near described first metal dust 642, shown in Fig. 8 E from described opening 622; Between the inwall of described center bar C3 and described first body 62, insert one second metal dust 644; Carry out a sintering process so that described first metal dust 642 and second metal dust 644 welding mutually, thereby form described porous capillary water conservancy diversion layer 64; And described center bar C3 taken out from described first body 62, shown in Fig. 8 G.
In above-mentioned specific embodiment, described body is connected with symmetrical manner with described cavity, and on practice, described body also can asymmetric mode be connected with described cavity.For example, described body is connected to described cavity near edge, to adapt to different spatial limitation.
In sum, the invention provides a kind of heat pipe and manufacture method thereof with different cross-sectional, the electronic building brick with big heating area or the electronic building brick of clustering can be set on the flat end of described heat pipe, and described electronic building brick radiating mode effectively and rapidly is provided.
Below preferred embodiment of the present invention is specified, but the present invention is not limited to described embodiment, those of ordinary skill in the art also can make all modification that is equal to or replacement under the prerequisite of spirit of the present invention, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (30)
1. a heat pipe is applicable to LED heat radiating, it is characterized in that, described heat pipe comprises:
One body, described body have one first opening, and the diameter of described body is less than 10mm;
One cavity, described cavity have one second opening, and described second opening is connected with described first opening, and described thus body and described cavity form a seal cavity; And
One porous capillary water conservancy diversion layer is formed in described body and the described cavity;
Wherein said seal cavity holds a working fluid, and described cavity perpendicular to a sectional area of described body bearing of trend a sectional area perpendicular to described body bearing of trend greater than described body, wherein said body in the length of its bearing of trend greater than the length of described cavity in described body bearing of trend.
2. heat pipe as claimed in claim 1 is characterized in that, described body and described cavity are formed in one.
3. heat pipe as claimed in claim 1 is characterized in that, described cavity comprises a groove and a loam cake, and described loam cake is connected with described groove and has described second opening.
4. heat pipe as claimed in claim 3 is characterized in that, it is made that described groove can pass through a powder metallurgical technique, a Sheet Metal Forming Technology, a jetting formation process or a casting technique.
5. heat pipe as claimed in claim 1 is characterized in that described cavity has a flat end.
6. heat pipe as claimed in claim 1 is characterized in that, described porous capillary water conservancy diversion layer can be coated with metal powder sintered the forming of copper, nickel or silver by a copper metal powder end, a nickel metal powder, a silver metal powder, a surface.
7. heat pipe as claimed in claim 1, it is characterized in that, described porous capillary water conservancy diversion layer comprises a metallic particles layer and a metal dictyosome, described metallic particles layer thermal sintering is on the inwall of the inwall of described body and described cavity, and described metal dictyosome is arranged on the described metallic particles layer.
8. heat pipe as claimed in claim 1, it is characterized in that, described porous capillary water conservancy diversion layer comprises a wavy crape folding hardware cloth and a flat metal scrim layer, described wavy crape folding hardware cloth is laid on the inwall of the inwall of described body and described cavity, and described flat metal scrim layer is arranged on the described wavy crape folding hardware cloth.
9. heat pipe as claimed in claim 8 is characterized in that, the shape of the wavy crape folding of described wavy crape folding hardware cloth can be triangle, rectangle, trapezoidal or waveform.
10. heat pipe as claimed in claim 1 is characterized in that, described porous capillary water conservancy diversion layer comprises several tiny indentations, is formed on the inwall of the inwall of described body and described cavity.
11. heat pipe as claimed in claim 1, it is characterized in that, described porous capillary water conservancy diversion layer comprises several tiny indentations and a metal sintering layer, described tiny indentation forms on the inwall of described cavity, and described metal sintering layer forms on the inwall of described body and with the welding mutually of described tiny indentation.
12. a heat pipe manufacture method is characterized in that, comprises the following step:
(a) provide a body, have one first opening and one the 3rd opening;
(b) provide a cavity, have one second opening;
(c) first opening of described body and second opening of described cavity are carried out sealed engagement, to form a semi-finished product heat pipe;
(d) described semi-finished product heat pipe is bled; And
(e) described the 3rd opening of sealing;
The inwall of wherein said semi-finished product heat pipe comprises a porous capillary water conservancy diversion layer, described semi-finished product heat pipe holds a working fluid, described cavity perpendicular to a sectional area of described body bearing of trend a sectional area perpendicular to described body bearing of trend greater than described body.
13. method as claimed in claim 12 is characterized in that, described cavity has a flat end.
14. method as claimed in claim 12 is characterized in that, the described sealed engagement of step (c) can be passed through a welding procedure, a fusion joining process, a mechanical snapping technology or a gluing technique.
15. method as claimed in claim 12 is characterized in that, described working fluid injected in the described semi-finished product heat pipe before or after step (d).
16. method as claimed in claim 12 is characterized in that, is formed with the metal bisque of a sintering on the inwall of described cavity, and described porous capillary water conservancy diversion layer is formed by the following step:
With a center bar in described the 3rd opening inserts described semi-finished product heat pipe and roughly near the metal bisque of described sintering;
Between described center bar and described semi-finished product heat pipe, insert one first metal dust;
Carry out a sintering process so that the metal bisque welding mutually of described first metal dust and described sintering, to form described porous capillary water conservancy diversion layer; And
Described center bar is taken out from described semi-finished product heat pipe.
17. method as claimed in claim 12 is characterized in that, has several tiny indentations on the inwall of described cavity, and described porous capillary water conservancy diversion layer is formed by the following step:
With a center bar in described the 3rd opening inserts described semi-finished product heat pipe and roughly near described several tiny indentations;
Between described center bar and described semi-finished product heat pipe, insert one second metal dust;
Carry out a sintering process so that described second metal dust and described several tiny indentation weldings mutually, to form described porous capillary water conservancy diversion layer; And
Described center bar is taken out from described semi-finished product heat pipe.
18., it is characterized in that described first metal dust or described second metal dust can be the metal dusts that a copper metal powder end, a nickel metal powder, a silver metal powder, a surface are coated with copper, nickel or silver as claim 16 or 17 described methods.
19. method as claimed in claim 12 is characterized in that, described porous capillary water conservancy diversion layer is formed by the following step:
Utilize a mechanical processing technique on the inwall of the inwall of described body and described cavity, make several tiny indentations, to form described porous capillary water conservancy diversion layer.
20. method as claimed in claim 12 is characterized in that, described porous capillary water conservancy diversion layer is formed by the following step:
Several metallic particles of sintering are on the inwall of the inwall of described body and described cavity; And
One metal dictyosome is set on described metallic particles, to form described porous capillary water conservancy diversion layer.
21. method as claimed in claim 12 is characterized in that, described porous capillary water conservancy diversion layer is formed by the following step:
Lay wavy crape folding hardware cloth on the inwall of the inwall of described body and described cavity; And
One flat metal scrim layer is set on described wavy crape folding hardware cloth, to form described porous capillary water conservancy diversion layer.
22. method as claimed in claim 12 is characterized in that, step (b) comprises:
One groove is provided;
One loam cake is provided, and described loam cake has described second opening; And
Described loam cake is connected with described groove, to form described cavity.
23. method as claimed in claim 22 is characterized in that, is formed with one first sintered metal layer on the described groove, covers on described to be formed with one second sintered metal layer, described first sintered metal layer is connected with described second sintered metal layer.
24. method as claimed in claim 22 is characterized in that, is formed with one first several tiny indentations on the described groove, covers on described to be formed with one second several tiny indentations, described first several tiny indentations are connected with described second several tiny indentations.
25. method as claimed in claim 22 is characterized in that, it is made that described groove can pass through a powder metallurgical technique, a Sheet Metal Forming Technology, a jetting formation process or a casting technique.
26. a heat pipe manufacture method is characterized in that, comprises the following step:
(A) provide one first body, have an openend and a blind end;
(B) cavity and one second body that the described first body necking down is connected with formation, wherein said cavity comprises described blind end, and described second body comprises described openend;
(C) described cavity and described second body are bled; And
(D) seal described openend;
The inwall of wherein said cavity and described second body comprises a porous capillary water conservancy diversion layer, described cavity and described second body hold a working fluid, described cavity perpendicular to a sectional area of described body bearing of trend a sectional area perpendicular to described body bearing of trend greater than described second body, wherein said body in the length of its bearing of trend greater than the length of described cavity in described body bearing of trend.
27. method as claimed in claim 26 is characterized in that, described blind end is smooth.
28. method as claimed in claim 26 is characterized in that, step (B) is implemented in the scope of 400 to 600 ℃ of temperature.
29. method as claimed in claim 26 is characterized in that, also comprises:
In step (A) afterwards, on wall within described first body, form described porous capillary water conservancy diversion layer.
30. method as claimed in claim 29 is characterized in that, described porous capillary water conservancy diversion layer is formed by the following step:
Insert one first metal dust in described first body;
With a center bar in described openend inserts described first body and roughly near described first metal dust;
Between the inwall of described center bar and described first body, insert one second metal dust;
Carry out a sintering process so that described first metal dust and the welding mutually of second metal dust, to form described porous capillary water conservancy diversion layer; And
Described center bar is taken out from described first body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101024554A CN101295685B (en) | 2007-04-28 | 2007-04-28 | Heat pipe and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2007101024554A CN101295685B (en) | 2007-04-28 | 2007-04-28 | Heat pipe and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN101295685A CN101295685A (en) | 2008-10-29 |
| CN101295685B true CN101295685B (en) | 2011-03-23 |
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| CN2007101024554A Expired - Fee Related CN101295685B (en) | 2007-04-28 | 2007-04-28 | Heat pipe and manufacturing method thereof |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101294698B (en) * | 2007-04-27 | 2010-06-02 | 新灯源科技有限公司 | Luminous diode lighting device |
| CN102147202A (en) * | 2010-02-10 | 2011-08-10 | 昆山德泰新金属粉末有限公司 | Heat pipe structure and manufacturing method thereof |
| CN103900409A (en) * | 2012-12-26 | 2014-07-02 | 俞仁企业股份有限公司 | Thermo-siphon type heat pipe manufacturing procedure and structure |
| TWI535990B (en) * | 2014-07-22 | 2016-06-01 | A larger heat pipe at one end and a manufacturing method thereof | |
| WO2016033071A1 (en) * | 2014-08-25 | 2016-03-03 | Sylvan Source, Inc. | Heat capture, transfer and release for industrial applications |
| CN105371214A (en) * | 2015-12-16 | 2016-03-02 | 广州共铸科技股份有限公司 | LED automobile head lamp |
| CN105403087A (en) * | 2015-12-25 | 2016-03-16 | 江苏宏力光电科技股份有限公司 | Thermal column structure |
| CN107044790A (en) * | 2016-02-05 | 2017-08-15 | 讯凯国际股份有限公司 | Solid heat transferring device |
| CN108362147A (en) * | 2018-01-04 | 2018-08-03 | 南通大学 | Micro heat pipe manufacturing method |
| CN113573540A (en) * | 2020-04-29 | 2021-10-29 | 华为机器有限公司 | Heat sink, method for manufacturing the same, and electronic device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731065A (en) * | 2005-07-30 | 2006-02-08 | 嘉善华昇电子热传科技有限公司 | Cylindrical heat pipe |
| CN1840258A (en) * | 2005-03-28 | 2006-10-04 | 新灯源科技有限公司 | Heat pipe with flat end surface and method for manufacturing the same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1840258A (en) * | 2005-03-28 | 2006-10-04 | 新灯源科技有限公司 | Heat pipe with flat end surface and method for manufacturing the same |
| CN1731065A (en) * | 2005-07-30 | 2006-02-08 | 嘉善华昇电子热传科技有限公司 | Cylindrical heat pipe |
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