CN102235830A - Flat-plate heat pipe structure and manufacture method thereof - Google Patents
Flat-plate heat pipe structure and manufacture method thereof Download PDFInfo
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- CN102235830A CN102235830A CN2010101632373A CN201010163237A CN102235830A CN 102235830 A CN102235830 A CN 102235830A CN 2010101632373 A CN2010101632373 A CN 2010101632373A CN 201010163237 A CN201010163237 A CN 201010163237A CN 102235830 A CN102235830 A CN 102235830A
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Abstract
The invention discloses a flat-plate heat pipe structure and a manufacture method thereof. The flat-plate heat pipe structure comprises a pipe body of which the inner surface is coated with a capillary structure layer; the pipe body is provided with a sintering support layer and working fluid internally, wherein the sintering support layer is provided with a plurality of column-shaped objects distributed in the pipe body; the column-shaped objects are vertically arranged to support the pipe body; thus, the thickness of the pipe body can be reduced without deforming; meanwhile, a working fluid backflow path is provided; after two sides of the pipe body are sealed, a sealed chamber is formed for the operation of the working fluid; manufacture procedures can be reduced; and larger chamber space is obtained.
Description
Technical field
The present invention relates to a kind of flat plate heat tube structure and manufacture method thereof, relate in particular to the heat pipe structure and the manufacture method thereof that are provided with a sintering supporting layer in a kind of flat body.
Background technology
Along with industry constantly develops, removing of cooling or heat is always the big obstacle that electronic industry develops.Along with the raising and the multi-functional application of dynamical requirement, degree of integration, also face big challenge for the requirement of dispelling the heat, so just become the major subjects of electronics industry for the research and development of heat transfer efficient.
Fin (Heat Sink) is used in heat dissipation with assembly or system usually among atmosphere; And under the lower situation of thermal resistance, show that then this fin has higher radiating efficiency.In general, thermal resistance is made of the diffusion thermal resistance of fin inside and the thermal-convection resistance between this fin surface and the atmospheric environment; On using, high conductance starves material such as copper, aluminium etc. often are used to make fin to reduce the diffusion thermal resistance; Yet thermal-convection resistance has limited the usefulness of fin, makes it can't reach the heat radiation requirement of electronic building brick of new generation.
In view of the above, existing market all is conceived to more efficient cooling mechanism, and proposes to have the heat pipe (Heat pipe) and the soaking plate (Vapor chamber) of high heat conduction efficiency successively, and itself and radiator are made up, with effective solution heat dissipation problem of present stage.
The radiating principle of soaking plate (Vapor chamber) is identical with heat pipe principle, utilize the evaporator strip of working fluid to walk heat, and this heat then spreads in air-flow.This steam touches cold surface and then condenses into liquid, and heat then is delivered to condensation surface (condensing surface) by the evaporating surface (with the contact-making surface of thermal source) of working fluid by this.
See also shown in Figure 1, plate heat pipe of the prior art, constituted by one first copper coin 10 and one second copper coin 11, wherein aforementioned first copper coin 10 connects corresponding second copper coin 11, and defining a chamber 12, aforementioned cavity 12 is in order to ccontaining and be filled with a working fluid (as water, liquid), and first copper coin 10 and second copper coin 11 respectively are provided with capillary structure 13 on the surface toward each other, and it just is coated in this chamber 12, that is, aforementioned capillary structure 13 is as forming chamber 12 inner surfaces; And the major function of general capillary structure known: one, see through the heat flux that the liquid film effect reduces wall; Two, increase boiling nucleation and increase disengagement area; Three, capillary structure contacts the growth that can stop vapor film with wall.Wherein aforementioned working fluid is because of the effect of gravity and capillary, and liquid distribution is in (being on the capillary structure 13 of aforementioned first copper coin 10 and second copper coin 11) on the capillary structure 13 of chamber 12 inside.
And, aforementioned first copper coin 10 pastes back to the surface of this chamber 12 and touches on the end face of a relative heat generating component (as central processing unit) (aforementioned first copper coin 10 was alleged evaporation ends or claimed heating end this moment), guide to second copper coin 11 (being alleged condensation end) in order to the heat that heat generating component is produced and go up heat radiation, so when heat generating component produces heat, when making first copper coin 10 absorb aforementioned heat, in it on capillary structure 13 flowing process fluid can become steam because of evaporating by heat.
Aforementioned steam flows to rapidly than cold spots (being second copper coin 11), up to steam arrive be transformed into liquid after second copper coin 11 is emitted latent heat after, the capillary structure 13 interior capillary forces that see through aforementioned second copper coin 11 flow back on first copper coin 10, reach heat radiation to finish a working cycles, but extend another problem is routine situation under flowing process fluid can not produce in the phase change process smoothly on aforementioned first copper coin, 10 its interior capillary structures 13: (1) increases the speed of working fluid two phase transformations along with the increase of heat conveying capacity, but capillary structure is low because of hole, the low flow resistance of backflow that causes of permeability increases, can't provide enough working fluids to get back to the aforementioned evaporation end in order to do making in good time, make the heating end generation of heat pipe dryout (dry out), and then cause soaking and poor heat radiation; (2) when heat flux constantly increases, the gas pressure that causes liquid level is greater than the pressure in the liquid, have the generation of steam bubbles this moment in the capillary structure, and aforementioned bubble not only can hinder the backflow of working fluid, the heat of heat pipe is passed between face and capillary structure produced the very large steam rete of thermal resistance, with cause heat can't be successfully by the working fluid transfer zone from evaporation ends, it is constantly accumulated at heating end, cause the heat pipe heating end to produce and dryout (dry out), and then cause soaking and poor heat radiation.
Prior art has following point to exist in the use:
Because housing is made of upper and lower coverboard, four sides of last lower house must be reserved thickness and use as combination seal, so will make the working space in the housing diminish, because the maximum area of working space must cut the reservation thickness of four sides.
Must seal four sides of coverboard up and down, could make housing become an airtight chamber, processing procedure is taken a lot of work, and cost promotes.
Because above-mentionedly commonly use every shortcoming that product are derived, the inventor of this case exhausts its intelligence then, concentrates on studies and innovate improvement, and successfully this part " flat plate heat tube structure and manufacture method thereof " a case is finished in research and development finally, and reality is the creation of tool effect enhancement.
Summary of the invention
For solving above-mentioned shortcoming of the prior art, main purpose of the present invention, provide a kind of flat plate heat tube structure, utilize a sintering support layer supports between the upper plate portion and lower board unit of flat body, prevent flat body distortion, keep the intensity of structure, because sintering structure has hole, gaseous working fluid spreadable to flat board be the whole space of heat pipe, and make the liquid working fluid that condenses in the body laterally and vertically transmit, and have return flow path concurrently as working fluid along this sintering supporting layer.
It is flat that another purpose of the present invention is to utilize body to add to be pressed into, compare the combination of known last lower house, the wall thickness of flat body can thinlyyer make the integral heat pipe structure more slim, and as long as closed on both sides promptly becomes the chamber of sealing, compare the known equal volume soaking plate that will seal four sides, can obtain bigger cavity space, the working fluid running is provided.
The invention provides one and feasiblely be embodied as a kind of flat plate heat tube structure for reaching above-mentioned purpose, comprise: a body, for flat and have a wall unit of a continued circling, this wall unit defines has a working fluid in the chamber, one first closed side and one second closed side are located at the both sides of this wall unit respectively and seal this chamber, this wall unit has a upper plate portion and a lower board unit, and this upper plate portion is this lower board unit relatively; One sintering supporting layer has plural column and is distributed in this chamber, and erect to be provided with and to be supported between this upper plate portion and this lower board unit, and these columns have a upside this upper plate portion relatively, and a downside this lower board unit relatively; One capillary structure layer is coated on this wall unit one side of this chamber relatively.
The invention provides another feasible manufacture method that is embodied as a kind of flat plate heat tube structure for reaching above-mentioned purpose, it comprises: a body is provided, wall unit with a continued circling defines a chamber, and this chamber forms one first port and one second port in these body both sides; The concora crush light-emitting diode body makes it become a flat body, and forms a upper plate portion and a lower board unit for the first time; A prefabricated sintering supporting layer has plural column, this sintering supporting layer is inserted in this chamber again, makes relative this upper plate portion of upside and relative this lower board unit of downside of these columns; The concora crush light-emitting diode body makes the spacing between this upper plate portion and the lower board unit dwindle and be close to respectively the upside and the downside of these columns for the second time; One conduit is provided, and this conduit has one first end and is exposed at outward outside this body, and one second end is communicated with this chamber; First port of flat body and second port engaged be sealed to one first closed side and one second closed side to seal this chamber, the upper and lower both sides with these columns combine with this upper plate portion and lower board unit respectively simultaneously; The flat body of this conduit and this is combined; By this conduit the air in the chamber is extracted out, passed through this conduit again in this chamber of hydraulic fluid feed-in; Seal first end of this conduit.
Further understand feature of the present invention and technology contents for making, see also following about detailed description of the present invention and accompanying drawing.
Description of drawings
The 1st figure is the prior art schematic diagram;
The 2nd figure is a schematic diagram in top down perspective of the present invention;
3A figure is the present invention's first cross-sectional schematic;
3B figure is the present invention's second cross-sectional schematic;
The 4th figure is a manufacture method schematic flow sheet of the present invention;
The 5th figure is the not pressurized preceding schematic diagram of body;
The 6th figure is that body is by the concora crush schematic diagram first time;
The 7th figure is that the sintering supporting layer is not put into the chamber schematic diagram;
The 8th figure is a schematic diagram of placing conduit.
Among the figure:
21 bodys
211 wall unit
2111 upper plate portion
2112 lower board units
212 chambers
22 sintering supporting layers
221 columns
222 connectors
23 capillary structure layer
24 first closed sides
25 second closed sides
26 conduits
261 first ends
262 second ends
The specific embodiment
The invention provides a kind of flat plate heat tube structure and manufacture method thereof, icon is preferred embodiment of the present invention, see also Fig. 2 and Fig. 3 A, 3B schematic diagram, mainly comprise a body 21, a sintering supporting layer 22 and a capillary structure layer 23 (wick structure) for flat plate heat tube structure of the present invention.
As shown in Figure 2, this body 21 is flat and has the wall unit 211 of a continued circling, this wall unit 211 defines a chamber 212, and both sides in this wall unit 211, set up one first closed side 24 and one second closed side 25 separately, seal this chamber 212 by these two closed sides, make this chamber 212 become a confined space.
Shown in Fig. 3 A and 3B, above-mentioned wall unit 211 has a upper plate portion 2111 and a lower board unit 2112, these upper plate portion 2111 relative these lower board units 2112, the first above-mentioned closed side 24 and second closed side 25, be formed on the both sides of this upper plate portion 2111 and lower board unit 2112, and these first closed side, 24 this upper plate portion 2111 of next-door neighbour and lower board units 2112, these second closed side, 25 this upper plate portion 2111 of next-door neighbour and lower board units 2112; Above-mentioned body 21 is a copper material in this preferable enforcement.
As shown in Figure 2, above-mentioned sintering supporting layer 22 has plural column 221 and plural connector 222 in this preferred embodiment.
These columns 221 are distributed in this chamber 212, and erect to be provided with and to be supported between this upper plate portion 2111 and this lower board unit 2112 (graphic as 3A, B), and the two ends of each column 221 are respectively relatively in conjunction with this upper plate portion 2111 and lower board unit 2112.These each connectors 222 mainly are connected between two columns 221, an end of section connecting element 222 connects a column 221 in addition, the other end connects another connector 222, these connectors 222 are in order to keeping the structural strength of this sintering supporting layer 12, and the both sides of each connecting piece 222 are corresponding to respectively this upper plate portion 2111 and lower board unit 2112.
Described sintering supporting layer 22 (comprising plural column 221 and plural connector 222) is that a capillary structure constitutes, this capillary structure be embodied as powder sintered or fiber (Fiber) or foaming form.The concrete enforcement of above-mentioned capillary structure layer 23 is then identical with this sintering supporting layer 22, utilize powder sintered or fiber (Fiber) or foaming formation, and coating is located at the one side of these wall unit 211 relative these chambers 212.
Moreover, one conduit 26 is connected with above-mentioned first closed side 24 or second closed side 25, this conduit 26 of expression and 24 bindings of first closed side in this enforcement, this conduit have one first end, 261 outer these body 21 outsides that are exposed at and are blind end, and one second end, 262 these chambers 212 of connection are the open end.With in the working fluid feed-in chamber 212, perhaps utilize this conduit 26 that the air in the chamber 212 is discharged by this conduit 26, this first end 261 is closed immediately then, and then this chamber 212 promptly forms the airtight vacuum space.
The concrete use of said structure makes lower board unit 2112 subsides touch the end face of a heat generating component (as central processing unit) (this moment, lower board unit 2112 was alleged evaporation ends or heating end), guide to upper plate portion 2111 (the alleged condensation end of doing) heat radiation in order to the heat that heat generating component is produced, when making lower board unit 2112 absorb heat when heat generating component produces heat, flowing process fluid can be steam because of evaporating by heat on capillary structure layer 23 in it and the sintering supporting layer 22.
Aforementioned steam flows to rapidly than cold spots (and upper plate portion 2111), after emitting latent heat, steam arrival upper plate portion 2111 is transformed into liquid, capillary force by this capillary structure layer 23 and sintering supporting layer 22 flow back into lower board unit 2112, finishes a working cycles and reach heat radiation in an airtight chamber 212.
Moreover, being depicted as the manufacture method flow chart of flat plate heat tube structure of the present invention as Fig. 4,5,6,7,8, above-mentioned structure is finished via routine step down, and described manufacture method comprises:
Step 1 (sp1): a body 21 is provided, and (the present invention does not limit the shape of body for hollow cylinder, the body of Any shape all can), and the wall unit 211 with a continued circling defines above-mentioned chamber 212, and this chamber 212 forms a port (as Fig. 5) respectively in these body 21 both sides.
Step 2 (sp2): concora crush light-emitting diode body 21 (or claiming precompressed bodys) for the first time, make it become a flat body 21, and make this wall unit 211 form upper plate portion 2111 and lower board unit 2112, these upper plate portion 2111 relative these lower board units 2112, the strength of concora crush can be controlled and exist a suitable spacing to hold above-mentioned sintering supporting layer 22 (as Fig. 6) between upper plate portion 2111 and the lower board unit 2112 for the first time.
Step 3 (sp3): prefabricated above-mentioned sintering supporting layer 22 has plural column 221 and connector 222, again this sintering supporting layer 22 is inserted in this chamber 212, the two ends that make these columns 221 are respectively to should upper plate portion 2111 and lower board unit 2112, and the both sides of these connectors 222 are respectively to should upper plate portion 2111 and lower board unit 2112 (as Fig. 7).
Sintering supporting layer 22 utilizes general known technology to finish in this step, for example in a mould, offer the depression of any arrangement and intercommunication, again powder (for example copper powder) is closely tamped in depression, thermal sintering is a capillary structure again, perhaps utilizes fiber or foaming and molding to make capillary structure in mould.
Step 4 (sp4): the aforementioned flat body 21 of the concora crush second time, make the spacing between this upper plate portion 2111 and the lower board unit 2112 dwindle, and be close to the two ends of these columns 221 and the both sides of these connectors 222 respectively, the two ends of the stressed column 221 that closely overlays sintering supporting layer 22 of upper plate portion 2211 and lower board unit 2212 and the both sides of these connectors 222 in this step, these columns 221 and connector 222 are also erect and are supported between upper plate portion 2211 and lower board unit 2212 (as Fig. 3 A, 3B) simultaneously.
Step 5 (sp5): provide a conduit 26 to be placed on above-mentioned arbitrary port, make first end, 261 outer being exposed at outside this body 21 of conduit 26, second end 262 is communicated with this chamber 212 (as Fig. 8).
Step 6 (sp6): two ports of flat body 21 are engaged be sealed to above-mentioned first closed side 24 and second closed side 25 to seal this chamber 212, two ends with these columns 221 combine with this upper plate portion 2111 and lower board unit 2112 respectively simultaneously, and the both sides of connector 222 combine with this upper plate portion 2111 and lower board unit 2112 respectively, specifically be to utilize the means of diffusion combination to finish integrating step in this step, and avoid conduit 26 (as Fig. 2) in first closed side 24.
Step 7 (sp7): the flat body 21 of this conduit 26 and this is combined, specifically be to utilize the means of solder joints to finish integrating step in this step, be enclosed in conduit 26 and 21 junction of flat body of first closed side 24, not only fix this conduit 26, and the gap closing between conduit 26 and the flat body 21 is got up.
Step 8 (sp8): the air in the chamber 212 is discharged by this conduit 26, pass through this conduit 26 again with in this chamber 212 of hydraulic fluid feed-in, in this step Schilling chamber 212, become vacuum state, hydraulic fluid imports in the chamber 212 more then, guarantees that hydraulic fluid is in the running of the space of a vacuum.
Step 9 (sp9): seal first end 261 of this conduit 26, this step makes whole chamber 212 become the state (as Fig. 2) of sealing fully.
Before step sp1, the one side of 211 relative chambers 212 forms a capillary structure layer 23 to this body 21 in the wall unit in advance, and a perhaps other prefabricated capillary structure layer 23 is combined in this capillary structure layer 23 one side of these wall unit 211 relative these chambers 212 again.
By above-mentioned structure and method for making, the improvements that the present invention compares prior art are:
Utilize a sintering support layer supports between the upper plate portion and lower board unit of flat body, not only prevent the distortion of flat body and keep outside the intensity of structure, because sintering structure has hole, gaseous working fluid spreadable to flat board be the whole space of heat pipe, and make the liquid working fluid that condenses in the body laterally and vertically transmit, and have return flow path concurrently as working fluid along this sintering supporting layer.
With body add be pressed into flat, compare the combination of known last lower house, the wall thickness of flat body can thinlyyer make the integral heat pipe structure more slim, and as long as closed on both sides promptly becomes the chamber of sealing, compare the known equal volume soaking plate that will seal four sides, can obtain bigger cavity space, the working fluid running is provided.
Though the present invention discloses as above with embodiment; right its is not in order to limiting the present invention, anyly is familiar with this skill person, without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, thus protection scope of the present invention when look accompanying claim the person of deciding be as the criterion.
Claims (18)
1. flat plate heat tube structure comprises:
One body, for flat and have a wall unit of a continued circling, this wall unit defines has a working fluid in the chamber, one first closed side and one second closed side are located at the both sides of this wall unit respectively and seal this chamber, this wall unit has a upper plate portion and a lower board unit, and this upper plate portion is this lower board unit relatively;
One sintering supporting layer has plural column and is distributed in this chamber, and erect to be provided with and to be supported between this upper plate portion and this lower board unit, and the two ends of these columns are corresponding to respectively this upper plate portion and lower board unit.
One capillary structure layer is coated on this wall unit one side of this chamber relatively.
2. flat plate heat tube structure according to claim 1, wherein this first closed side and one second closed side wherein either side link a conduit, this conduit has one first end and exposes this body outside, reach one second end and be communicated with this chamber, and this first end is a blind end.
3. flat plate heat tube structure according to claim 1, wherein this sintering supporting layer has plural connector, and each connector connects two columns, and the both sides of these connectors are corresponding to respectively this upper plate portion and lower board unit.
4. flat plate heat tube structure according to claim 3, wherein this sintering supporting layer is that capillary structure constitutes.
5. flat plate heat tube structure according to claim 4, wherein these columns are random geometry.
6. flat plate heat tube structure according to claim 4, wherein this capillary structure is powder sintered, fiber (Fiber) or foaming form.
7. flat plate heat tube structure according to claim 1, wherein this body is a copper material.
8. flat plate heat tube structure according to claim 1, wherein this capillary structure layer is powder sintered, fiber (Fiber) or foaming form.
9. the manufacture method of a flat plate heat tube structure comprises:
One body is provided, and the wall unit with a continued circling defines a chamber, and this chamber forms one first port and one second port respectively in these body both sides;
The concora crush light-emitting diode body makes it become a flat body, and forms a upper plate portion and a lower board unit for the first time;
A prefabricated sintering supporting layer has plural column, this sintering supporting layer is inserted in this chamber again, makes respectively relative this upper plate portion in two ends and the lower board unit of these columns;
Concora crush light-emitting diode body for the second time makes this upper plate portion dwindle with the spacing between the lower board unit and is close to the two ends that combine these columns respectively;
One conduit is provided, and this conduit has one first end and is exposed at outward outside this body, and one second end is communicated with this chamber;
First port of flat body and second port engaged be sealed to one first closed side and one second closed side to seal this chamber;
The flat body of this conduit and this is combined;
By this conduit the air in the chamber is extracted out, passed through this conduit again in this chamber of hydraulic fluid feed-in;
Seal first end of this conduit.
10. the manufacture method of flat plate heat tube structure according to claim 9, wherein the one side of this relative chamber in wall unit forms a capillary structure layer.
11. the manufacture method of flat plate heat tube structure according to claim 9 more comprises a prefabricated capillary structure layer, this capillary structure layer is combined in this wall unit one side of this chamber relatively again.
12. according to the manufacture method of claim 10 or 11 described flat plate heat tube structures, wherein this capillary structure layer is powder sintered, fiber (Fiber) or foaming form.
13. the manufacture method of flat plate heat tube structure according to claim 9, wherein this first port and second port utilization diffusion is sealed to this first closed side and second closed side in conjunction with engaging.
14. the manufacture method of flat plate heat tube structure according to claim 9, wherein the two ends of these columns utilize diffusion in conjunction with combining with this upper plate portion and lower board unit respectively.
15. the manufacture method of flat plate heat tube structure according to claim 9, wherein this conduit utilization welding combines with this flat body.
16. the manufacture method of flat plate heat tube structure according to claim 9, wherein this sintering supporting layer has plural connector, and each connector connects two columns, corresponding respectively this upper plate portion and the lower board unit of linking in the both sides of these connectors.
17. the manufacture method of flat plate heat tube structure according to claim 16, wherein the both sides of this connector utilize diffusion in conjunction with combining with this upper plate portion and lower board unit respectively.
18. according to the manufacture method of claim 9 or 16 described flat plate heat tube structures, wherein this sintering supporting layer is powder sintered, fiber (Fiber) or foaming form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101632373A CN102235830A (en) | 2010-04-30 | 2010-04-30 | Flat-plate heat pipe structure and manufacture method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101632373A CN102235830A (en) | 2010-04-30 | 2010-04-30 | Flat-plate heat pipe structure and manufacture method thereof |
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| CN102235830A true CN102235830A (en) | 2011-11-09 |
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| CN2010101632373A Pending CN102235830A (en) | 2010-04-30 | 2010-04-30 | Flat-plate heat pipe structure and manufacture method thereof |
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| CN101639331A (en) * | 2008-07-31 | 2010-02-03 | 富准精密工业(深圳)有限公司 | Method for manufacturing flat-plate heat tube |
| CN101941072A (en) * | 2009-07-08 | 2011-01-12 | 富准精密工业(深圳)有限公司 | Manufacturing method of panel-type heat pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7032652B2 (en) * | 2004-07-06 | 2006-04-25 | Augux Co., Ltd. | Structure of heat conductive plate |
| US20060098411A1 (en) * | 2004-11-11 | 2006-05-11 | Taiwan Microloops Corp. | Bendable heat spreader with metallic wire mesh-based microstructure and method for fabricating same |
| CN1702420A (en) * | 2005-06-28 | 2005-11-30 | 杨洪武 | Wicking and bracing frame for inner cavity of integrated heat pipe radiator |
| US20090071635A1 (en) * | 2007-09-13 | 2009-03-19 | Shung-Wen Kang | Thermal spreader for simultaneously enhancing capillary effect and structural strength |
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| CN101639331A (en) * | 2008-07-31 | 2010-02-03 | 富准精密工业(深圳)有限公司 | Method for manufacturing flat-plate heat tube |
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Application publication date: 20111109 |