CN205897914U - Flat plate heat pipe with multislot way sintering bearing structure - Google Patents
Flat plate heat pipe with multislot way sintering bearing structure Download PDFInfo
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- CN205897914U CN205897914U CN201620449612.3U CN201620449612U CN205897914U CN 205897914 U CN205897914 U CN 205897914U CN 201620449612 U CN201620449612 U CN 201620449612U CN 205897914 U CN205897914 U CN 205897914U
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- heat pipe
- plate heat
- cover board
- metal cover
- liquid
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Abstract
The utility model discloses a flat plate heat pipe with multislot way sintering bearing structure, it includes two piece upper and lower metal attachment, forms inclosed cavity through seal between the upper and lower metal attachment, has liquid working medium inside packing of cavity, the internal surface of cavity is divided into evaporating surface and condensing surface, all lays the porous imbibition core structure of thin layer that metal powder granule sintering formed respectively, and the sintering forms array arrangement's support column on the evaporating surface, and the condensing surface is then processed out and this support column top cylinder boss matched with cylinder hole, forms the working medium return flow line after both looks scarves close. This flat plate heat pipe has improved the capillary pressure, and the axial channel that forms on the sintering support column provides good working medium return flow line, has reduced the liquid reflux resistance, and showing and accelerating the working medium back flow velocity, realized vapour the double -phase separation of liquid has improved heat transfer performance, simultaneously, this support column can effectively prevent the flat plate heat pipe deformation scheduling problem that sinks.
Description
Technical field
The utility model is related to a kind of flat-plate heat pipe with multi-channel sintering supporting construction.
Background technology
With scientific and technical development, electronic product is constantly towards high-power, small size, high-density packages and multifunction side
To development.Due to the continuous improvement of heat flow density, lead to performance, reliability and the security face of integrated circuit and semiconductor devices
Face serious heat dissipation problem., if the heat that led chip operation produces can not shift in time taking high-power LED as a example, will greatly
Affect its luminous efficiency, when serious, even result in its inefficacy.Traditional cooling radiating mode is difficult to meet electronic product and enters one
The requirement of step development, solution-air phase transformation has become the selection of current and expected future electronic applications radiating mode.Heat pipe heat radiation technology utilizes
In airtight cavity, the evaporation of liquid working substance, the solution-air phase transition process of condensation, to realize quickly scattering and disappearing of heat, have high thermal conductivity
Can, excellent isothermal performance, the advantages of driving without extra power.But its heat exchange pattern is one-dimensional it is difficult to meet face heat
The demand in source.Flat-plate heat pipe, compared to general heat pipe, belongs to two-dimensional surface conduction pattern, can be rapidly by one or more centrostigmas heat
Uniform to one big plane of the intimate isothermal of high heat flux in source, thus heat can be shifted rapidly；Additionally, also having
Heating surface area is big, average temperature performance is good, the advantages of be easy to photoelectric device integrative packaging, have a extensive future.
Generally, flat-plate heat pipe is put together by upper and lower two pieces of metal cover boards welding, by the working medium evaporation of imbibition in-core, cold
Condensed-phase becomes the fast transfer realizing heat.Common flat-plate heat pipe, only arranges groove, agglomerated powder last layer on the surface of upper and lower cover plates
Or porous silk screen layer, there is the defects such as working medium return flow path length, osmotic resistance be big, the problems such as be easily caused evaporating surface local dry burning；
And it is not provided with support column arrangement, lead to flat-plate heat pipe anti-pressure ability poor, the stability of support cannot be guaranteed, easily because of temperature mistake
High or impressed pressure is excessive and generation is caved in or Fracture Deformation phenomenon.
At present, existing researcher proposes to play a supporting role in inside cavity interpolation guide support, silk screen or vascular etc..This
Can also be flattened after Large Diameter Pipeline copper pipe is sintered outward, fill supporting construction, realize the manufacture of flat-plate heat pipe.However, existing
Working medium return flow path length, backflow osmotic resistance big, manufacturing process is complicated, high cost the problems such as, be easily caused flat-plate heat pipe and integrally pass
The deterioration of hot property.
Utility model content
Main purpose of the present utility model is to overcome drawbacks described above of the prior art, proposes a kind of structure simple, anti-
The flat-plate heat pipe with multi-channel sintering supporting construction that pressure performance is good, working medium return flow path is short, backflow osmotic resistance is little.
The utility model adopts the following technical scheme that
A kind of have the flat-plate heat pipe that multi-channel sinters supporting construction, including upper metal cover board, lower metal cover board, on this,
Lower metal cover board is tightly connected formation cavity, is filled with liquid working substance in this cavity；It is characterized in that: table in metal cover board on this
The inner surface of face and lower metal cover board is equipped with thin layer loose structure respectively, and between this two thin layers loose structure, also formation has
The multi-channel sintering supporting construction of working medium runner, and respectively constitute liquid-sucking core and lower liquid-sucking core.
Preferably, described multi-channel sintering supporting construction includes some support columns being formed at lower liquid-sucking core, and some right
The cylindrical hole of liquid-sucking core should be formed at, this support column top be provided with embedded corresponding upper liquid-sucking core cylinder in the hole and with upper metal
The cylinder boss of cover inner surface contact, and support column is provided with described working medium runner.
Preferably, described support column and described thin layer loose structure are formed in one, and described some support columns are vertical
In described lower metal cover board inner surface and uniform array distribution.
Preferably, for some along the axially extended conduit of this support column, this some conduit is along support to described working medium runner
Post peripheral distribution, described cylinder boss is located above this conduit.
Preferably, described conduit rectangular cross-section or trapezoidal.
Preferably, the material selection copper of described upper metal cover board or lower metal cover board or aluminium.
Preferably, described support column base diameter is 6-8mm, top diameter 4-5mm, and total height is 1.5-4mm.
Preferably, described thin layer loose structure adopts metal powder sintered formation, and the particle diameter of this metal dust is 50 μm～
150μm.
From above-mentioned to description of the present utility model, compared with prior art, the utility model has beneficial effect as follows
Really:
(1) the utility model has the liquid-sucking core that multi-channel sinters supporting construction, substantially increases capillary pressure, reduces
The osmotic resistance of liquid backflow；The conduit of sintering support column surrounding setting not only shortens working medium return flow path, and for condensing
Liquid backflow provides more working medium return flow lines；Efficiently separating of vapour-liquid two-phase can be realized, thus decreasing vapour-liquid
Sticky shearing stress on interface, thus significantly improve the capillary limitation of flat-plate heat pipe, the boiling limit and the shearing limit, strengthening
The heat transfer property of flat-plate heat pipe；
(2) multi-channel of the present utility model sinters supporting construction, because lower liquid-sucking core is the integrative-structure that sintering is formed, under
Liquid-sucking core and upper liquid-sucking core phase panelling close fit, therefore either extraneous apply pressure, or flat-plate heat pipe internal cavity be in low
Pressure or high pressure state, can prevent flat-plate heat pipe from caving in a certain extent or sealing-off cracking phenomena generation.Simultaneously because
It is conical support for multi-channel support column, so stability of strutting system also significantly improves；
(3) heat pipe of the present utility model, because liquid working substance can be thin by the circumferential channel on support column and wall
Which kind of placement no matter this flat-plate heat pipe, from cryosurface quick backflow to evaporating surface, is therefore carried out, all by layer porous wick structure structure
On steam in cryosurface condensed liquid backflow direction and velocity magnitude impact very little, thus improve the work of this flat-plate heat pipe
Make stability, reliability and its application flexibility.
Brief description
Fig. 1 is the exploded perspective view of flat-plate heat pipe of the present utility model；
Fig. 2 is the generalized section of flat-plate heat pipe of the present utility model；
Fig. 3 is the lower liquid-sucking core schematic diagram of evaporating surface；
Fig. 4 is support column enlarged drawing；
The second mould schematic diagram that Fig. 5 is used by liquid-sucking core under manufacture；
Fig. 6 fills out powder generalized section for lower liquid sucting core structure；
Fig. 7 fills out powder generalized section for upper liquid sucting core structure；
Wherein: 1, upper metal cover board, the 11, first liquid injection port, 2, lower metal cover board, the 21, second liquid injection port, 3, upper imbibition
Core, 31, cylindrical hole, 4, lower liquid-sucking core, 41, support column, 411, cylinder boss, 412, conduit, the 5, first mould, 51, mould convex
Platform, the 6, second mould, 61, groove, 611, through hole.
Specific embodiment
Below by way of specific embodiment, the utility model will be further described.
Referring to figs. 1 to Fig. 4, a kind of have multi-channel sinter supporting construction flat-plate heat pipe, include go up metal cover board 1, under
Metal cover board 2, this upper and lower metal cover board 1,2 connects formation cavity by welded seal, is filled with liquid working substance in this cavity.
On this, as cryosurface, the inner surface of lower metal cover board 2 is as evaporating surface, and is equipped with thin layer respectively for metal cover board 1 inner surface
Loose structure.Also form the multi-channel sintering supporting construction with working medium runner, two thin layers are many between this two thin layers loose structure
Pore structure respectively constitutes liquid-sucking core 3 and lower liquid-sucking core 4 with multi-channel sintering supporting construction.
Multi-channel sintering supporting construction include some support columns 41 being formed at lower liquid-sucking core 4, and some be correspondingly formed in
The cylindrical hole 31 of upper liquid-sucking core 3.Some support columns 41 are all formed in one with thin layer loose structure, and perpendicular to lower metal cover board
2 evaporating surface uniform array distribution.This support column 41 top be provided with embedded corresponding cylindrical hole 31 and with upper metal cover board 1
The cylinder boss 411 of inner surface contact.Working medium runner is additionally provided with support column 41, this working medium runner is some along this support column 41
Axially extended conduit 412, this some conduit 412 is along support column 41 peripheral distribution, and is located at below cylinder boss 411.
Specifically, upper metal cover board 1 and lower metal cover board 2 be copper plate, aluminium sheet made, preferably t2 red copper material, its
Thickness range is in 0.5mm-1.5mm, preferably 1mm.Its size selects according to the actual requirements, herein preferably 73mm*73mm.Should
Upper metal cover board 1, lower metal cover board 2 form a cavity through Milling Process in its inner face, and the size of cavity all selects 63mm*63mm.
The thickness of upper liquid-sucking core 3 and lower liquid-sucking core 4 is 0.2mm-1mm, preferably 0.5mm.Upper metal cover board 1 is provided with the first note of semicircle
Liquid mouth 11, lower metal cover board 2 is provided with the second liquid injection port 21 of semicircle, after upper metal cover board 1 and lower metal cover board 2 welded seal,
First liquid injection port 11 and the second liquid injection port 21 are formed as vacuumizing and irrigate the cylindrical hole of liquid working substance.
Support column 41 of the present utility model can for cylinder or round platform or or terrace with edge, preferably frustum cone structure, support column 41
Base diameter is 6-8mm, top diameter 4-5mm, and cylinder boss 411 diameter is preferably 4mm.Total height 1.5- of support column 41
4mm, preferably 3mm.To the highly preferred 2.5mm at top, top cylinder boss 411 is highly preferred to be for the bottom of support column 41
0.5mm.The conduit 412 of support column 41 can be rectangle or trapezium structure, preferably rectangular, the preferred 0.2- of its cross-sectional width
0.4mm, cross-sectional height is preferably 0.2-0.4mm.Cylindrical hole 31 on the lower liquid-sucking core 4 of cryosurface, diameter is preferably 4mm,
Highly preferred for 0.5mm.
Upper and lower liquid-sucking core 3,4 is made by solid-phase sintering mode using copper powder particle, and the grain shape of metal dust is ball
Shape or irregular shape；Metal powder granulates particle diameter is 50 μm～150 μm, and according to actual needs, metal powder granulates diameter is permissible
It is adjusted within this range.
The manufacture method of the utility model flat-plate heat pipe, comprises the steps:
1) the first mould 5 and the second mould 6 are produced using machining.Mold material selects stainless steel, concrete technology
Process is: carries out milling to six faces of stainless steel materials on milling machine, reaches the dimensional requirement of mould, for cylindrical hole
31 upper liquid-sucking core 3, on stainless steel Milling Process go out the mold convexity 51 matching with cylindrical hole 31, obtain the first mould
5.With reference to Fig. 5, for the lower liquid-sucking core 4 with support column 41, one of corrosion resistant plate clamping on boring machine.First, make
Go out through hole 611 with the tool sharpening of suitable diameter, then process groove 61 structure being adapted to boss 411 with boring cutter, then will
Workpiece is fixed on slotting machine, adjusts the angle between fixture and semi-finished product mould, and shaping goes out the groove being adapted to conduit 412
61, obtain the second mould 6.
2) sheet metal choose two pieces of cleaned decontamination, drying respectively as flat-plate heat pipe upper metal cover board 1 and under
Metal cover board 2, wherein descends metal cover board 2 to be to make the sheet metal that inner face has cavity, upper metal through Milling Process for one piece
Cover plate 1 is the sheet metal of one flat plate shape；The inner surface of upper metal cover board 1 is cryosurface, and the inner surface of lower metal cover board 2 is
Evaporating surface.
3) metal powder granulates taking appropriate particle size (as 75-100 μm) fill the first door frame 5 and upper metal cover board 1 respectively,
In the cavity that second mould 6 is separately constituted with lower metal cover board 2, as shown in Figure 6 and Figure 7, metal dust is made to adequately fill up cavity
Till.Vibrate mould during filling in good time, so that copper ball powder is sufficient filling with.Will be real for the cavity cap that finishes of filling it is ensured that on metal dust
That holds is concordant.In order to reduce the resistance in the demoulding for the mould, it is to avoid liquid sucting core structure is destroyed or takes off does not fall mould, permissible
Apply one layer of resistant to elevated temperatures releasing agent in mould inner surface, or high temperature nitriding is carried out to die surface.
4) metal cover board filling in copper powder is placed on support and fixes, be placed in sintering in box atmosphere protection resistance furnace,
Powder sintered concrete steps: first to sintering stove evacuation, then pass to nitrogen and protected.The heating schedule of sintering is: with
The speed of 300-400 DEG C/h is incubated 20-40min after being warming up to 400-500 DEG C, then is warming up to the speed of 300-400 DEG C/h
Heat preservation sintering 30-90min after 850-1000 DEG C；Preferably heating schedule is: is warming up to 400- with the speed of 300-400 DEG C/h
It is incubated 25-35min, 30-90min is burnt in insulation after the speed of 300-400 DEG C/h is warming up to 900-1000 DEG C after 450 DEG C.In temperature
Hydrogen shield is used instead, to prevent sample oxidation during higher than 400 DEG C.
5) after the completion of sintering, stove is cooled to room temperature, takes out support, by the first mould 5, second on evaporating surface, on cryosurface
Mould 6 is extracted, thus obtaining the lower liquid-sucking core 4, Yi Jileng being connected with thin layer loose structure on evaporating surface containing support column 41
Solidifying face is provided with the upper liquid-sucking core 3 of the thin layer loose structure of cylindrical hole 31.
6) upper metal cover board 1 is connected and sealed by soldering with lower metal cover board 2, is set using vacuum after the completion of welding
For vacuumizing to flat-plate heat pipe, vacuum should ensure that environment cleaning is dustless.After the completion of vacuumizing, liquid working substance is entered
Row degasification, then irrigates working medium to the inside of flat-plate heat pipe, and seals, thus obtaining thering is the flat board that multi-channel sinters support column 41
Heat pipe.
Above are only specific embodiment of the present utility model, but design concept of the present utility model be not limited thereto,
All changes that using this design, the utility model is carried out with unsubstantiality, all should belong to the row invading the utility model protection domain
For.
Claims (7)
1. a kind of have the flat-plate heat pipe that multi-channel sinters supporting construction, and including upper metal cover board, lower metal cover board, this is upper and lower
Metal cover board is tightly connected formation cavity, is filled with liquid working substance in this cavity；It is characterized in that: metal cover board inner surface on this
It is equipped with thin layer loose structure respectively with the inner surface of lower metal cover board, and between this two thin layers loose structure, also formation has work
The multi-channel sintering supporting construction in mass flow road, and respectively constitute liquid-sucking core and lower liquid-sucking core；Described multi-channel sintering supports knot
Structure includes some support columns being formed at lower liquid-sucking core, and some be correspondingly formed in the cylindrical hole of upper liquid-sucking core, this support capital
The cylinder boss that portion is additionally provided with the cylinder in the hole of embedded corresponding upper liquid-sucking core and is contacted with upper metal cover board inner surface, and support column
It is provided with some working medium runners along support column peripheral distribution.
2. as claimed in claim 1 a kind of have multi-channel sinter supporting construction flat-plate heat pipe it is characterised in that: described
Dagger is formed in one with described thin layer loose structure, and described some support columns are perpendicular to described lower metal cover board inner surface
And uniform array distribution.
3. as claimed in claim 1 a kind of have multi-channel sinter supporting construction flat-plate heat pipe it is characterised in that: described work
For some along the axially extended conduit of this support column, described cylinder boss is located above this conduit in mass flow road.
4. as claimed in claim 3 a kind of have multi-channel sinter supporting construction flat-plate heat pipe it is characterised in that: described groove
Road rectangular cross-section or trapezoidal.
5. as claimed in claim 1 a kind of have multi-channel sinter supporting construction flat-plate heat pipe it is characterised in that: on described
The material selection copper of metal cover board or lower metal cover board or aluminium.
6. as claimed in claim 1 a kind of have multi-channel sinter supporting construction flat-plate heat pipe it is characterised in that: described
Dagger base diameter is 6-8mm, top diameter 4-5mm, and total height is 1.5-4mm.
7. as claimed in claim 1 a kind of have multi-channel sinter supporting construction flat-plate heat pipe it is characterised in that: described thin
Layer loose structure adopts metal powder sintered formation, and the particle diameter of this metal dust is 50 μm～150 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620449612.3U CN205897914U (en) | 2016-05-17 | 2016-05-17 | Flat plate heat pipe with multislot way sintering bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620449612.3U CN205897914U (en) | 2016-05-17 | 2016-05-17 | Flat plate heat pipe with multislot way sintering bearing structure |
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| Publication Number | Publication Date |
|---|---|
| CN205897914U true CN205897914U (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620449612.3U Expired - Fee Related CN205897914U (en) | 2016-05-17 | 2016-05-17 | Flat plate heat pipe with multislot way sintering bearing structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973045A (en) * | 2016-05-17 | 2016-09-28 | 广东省惠州市质量计量监督检测所 | Flat heat pipe with multi-channel sintered supporting structure and manufacturing method thereof |
| CN107421364A (en) * | 2017-06-09 | 2017-12-01 | 陈翠敏 | Equalizing plate structure and its manufacture method |
| CN108120333A (en) * | 2018-01-24 | 2018-06-05 | 厦门大学 | A kind of flat-plate heat pipe microchannel composite heating radiator and its manufacturing method |
| CN109708501A (en) * | 2018-12-05 | 2019-05-03 | 太原航空仪表有限公司 | A kind of full aluminium phase transformation temperature-uniforming plate of large scale and fill out powder tooling and production method |
-
2016
- 2016-05-17 CN CN201620449612.3U patent/CN205897914U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973045A (en) * | 2016-05-17 | 2016-09-28 | 广东省惠州市质量计量监督检测所 | Flat heat pipe with multi-channel sintered supporting structure and manufacturing method thereof |
| CN105973045B (en) * | 2016-05-17 | 2017-12-08 | 广东省惠州市质量计量监督检测所 | A kind of flat-plate heat pipe and its manufacture method with multi-channel sintering supporting construction |
| CN107421364A (en) * | 2017-06-09 | 2017-12-01 | 陈翠敏 | Equalizing plate structure and its manufacture method |
| CN107421364B (en) * | 2017-06-09 | 2020-08-25 | 陈翠敏 | Temperature equalizing plate structure and manufacturing method thereof |
| CN108120333A (en) * | 2018-01-24 | 2018-06-05 | 厦门大学 | A kind of flat-plate heat pipe microchannel composite heating radiator and its manufacturing method |
| CN109708501A (en) * | 2018-12-05 | 2019-05-03 | 太原航空仪表有限公司 | A kind of full aluminium phase transformation temperature-uniforming plate of large scale and fill out powder tooling and production method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170118 Termination date: 20200517 |