CN206442652U - A kind of flexible microflute group heat abstractor - Google Patents
A kind of flexible microflute group heat abstractor Download PDFInfo
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- CN206442652U CN206442652U CN201720101879.8U CN201720101879U CN206442652U CN 206442652 U CN206442652 U CN 206442652U CN 201720101879 U CN201720101879 U CN 201720101879U CN 206442652 U CN206442652 U CN 206442652U
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- flexible
- cavity
- microflute group
- heat abstractor
- rib block
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Abstract
The utility model discloses a kind of flexible microflute group heat abstractor, including：Cavity, rib block supporting construction, capillary wick, whole device includes evaporator section, adiabatic section and condensation segment.Cavity material is made up of flexible heat conducting nano composite material, with high thermal conductivity.There are many micro-channels on evaporating surface, form microflute group, under capillary forces, working media is drawn into phase transformation in micro-channel and evaporated.Capillary wick cooperates with microflute group structure that liquid-working-medium is drawn into evaporator section from condensation segment and completes working medium circulation.Rib block in the middle of cavity plays a part of building steam channel.The utility model has heat dispersion high, the advantages of bendable curvature is big and frivolous.The heat dissipation problem of flexible electronic product can be solved well using the utility model, its operating temperature is reduced, electronic product performance is lifted.
Description
Technical field
The utility model is related to a kind of heat dissipation technology, more particularly to a kind of flexible microflute group heat abstractor.
Background technology
With the fast development of microelectric technique, the processing speed of chip is more and more faster, and heat flow density is sharply increased, chip
The local heat flux density of level reaches 100W/cm2More than, it is even more close using the micro-system local heat flux density of three-dimension packaging
1000W/cm2.Chip cooling mode mainly has now：Fin radiating, the cooling of liquid single-phase convection, forced air cooling, forced convection
Boiling cooling, heat pipe and microflute group etc..The utilization of the application of these technologies particularly microflute group technology is solved to a certain extent
The heat dissipation problem of high power density chip.But with the development of science and technology the mankind for electronic product dependence increasingly
Weight, in order to lift operating efficiency, it would be desirable to realize the electronic product used everywhere, and be no longer limited to space problem, Ren Leikai
Beginning is directed to flexibility of research and development electronic technology, and the emphasis as countries in the world has researched and developed one of subject matter in recent years for it.Flexible electronic is produced
Product have the characteristic such as flexible, frivolous, will overturn the form of conditional electronic product, and this also brings more for the heat dissipation problem of chip
High technical requirements.Traditional flat-plate heat pipe or microflute group are constituted with thermal conductive metallic material mostly, and its material is typically harder,
It can not bend, density is also big, therefore the radiating requirements of flexible electronic product can not be met.
Research now concerning flexible heat sink technology is concentrated mainly on some passive types technically, such as flexible heat pipe and flexibility
Flat-plate heat pipe etc..It mainly prepares flexible cavity from various polymer (material such as such as polypropylene, PET, LCP and PDMS)
Material, so as to solve the buckling problem of heat pipe.Although the flexible problem of radiating element that these high molecular polymers are solved,
It is that itself relatively low thermal conductivity factor limits its application in electronic product.In order to solve these problems, there is researcher to exist
Evaporation ends add metal derby or metal passage to improve its heat exchange property, although forefathers make various effort, heat management
The improvement of device performance is still limited.In addition to the thermal resistance problem of above-mentioned evaporation ends and condensation end, the steam in small space
Flowing is also problematic.For above-mentioned evaporation ends, condensation end thermal resistance problem, and steam flow field problem prepare to adopt
The heat dissipation problem of flexible electronic product is solved with microflute group's technology based on flexible heat conducting nano composite material.
The content of the invention
(1) technical problem to be solved
The utility model proposes a kind of flexible microflute group heat abstractor, to solve existing flexible heat sink device evaporation ends, cold
Solidifying end thermal resistance problem, and steam flow field problem.
(2) technical scheme
The utility model provides a kind of flexible microflute group heat abstractor, including cavity 1, rib block supporting construction 2, capillary wick 3；
Characterized in that,
Cavity 1 is closed cavity, and the material of cavity 1 is flexible heat conducting nano composite material, and thermal conductivity factor is high, two in cavity 1
It is rib block supporting construction 2 that individual apparent surface, which is carved with the middle of a plurality of micro-channel 4, composition microflute group, cavity, and rib block supporting construction 2 is
Flexible material, the laminating for preventing the upper microflute group of two apparent surfaces；
Cavity 1 and rib block supporting construction 2, which are combined, builds steam channel, for steam circulation；
Capillary wick 3 is fixed in the middle of microflute group and rib block supporting construction 2, for withdrawing fluid.
Wherein, the material of cavity 1 is flexible heat conducting nano composite material, by high molecular polymer mixing high heat conducting nano
Granular materials, carbon fiber or CNT etc. are made, and wherein high molecular polymer is polypropylene, PET, PMDS, LCP, polyamides Asia
Amine or FR4.
Wherein, the rib block supporting construction 2 is made up of silica gel or rubber.
Wherein, the capillary wick 3 is made up of copper mesh or the copper capillary wick of sintering that working out.
Wherein, the size of micro-channel 4 is micron order.
Wherein, working media during flexible microflute group heat abstractor work is filled in working media flow cavity 5.
Wherein, the working media is methanol, absolute ethyl alcohol, acetone or distilled water.
(3) beneficial effect
It can be seen from the above technical proposal that the utility model has the advantages that：
(1) the utility model provides a kind of flexible microflute group heat abstractor, with reference to flexible nano composite and microflute group
Heat dissipation technology, the capacity of heat transmission of flexible nano composite is significantly larger than other such as polypropylene materials, reduce evaporator section and
The thermal resistance of condensation segment, enhances the heat exchange property of heat abstractor；Cavity intermediate rib block constructs reliable steam channel, reduces
Steam transports resistance；Cavity inner wall face is provided with multiple micro-channels, and working medium is inhaled into micro-channel under capillary force effect, and
The continuous liquid film distribution of the evaporation of high intensity micro-scale and boiling composite phase-change heat exchange, this liquid film distribution tool are formed in micro-channel
Have it is superpower take heat energy power, take hot heat flow density up to 109W/m2Magnitude, and take thermal process idle, energy-conserving and environment-protective.
(2) the utility model provides a kind of flexible microflute group heat abstractor, and heat abstractor is by flexible macromolecule polymer
The nano composite material of matrix is constituted, and lightweight, small volume is flexible, can be adapted to electronic product with the bending of various angles
Radiating requirements, while whole device is simple, working stability, reliability is high.
Brief description of the drawings
Fig. 1 is flexible microflute group's heat abstractor outside drawing of a specific embodiment of the present utility model；
Fig. 2 is flexible microflute group's heat abstractor Section A-A figure of a specific embodiment of the present utility model；
Fig. 3 is flexible microflute group's heat abstractor section B-B figure of a specific embodiment of the present utility model；
Fig. 4 is two part schematic diagrames for overall cavity；
Fig. 5 is scheme of installation of the flexible microflute group heat abstractor of the present utility model in flexible mobile phone.
Description of reference numerals：
1- cavitys；2- rib block supporting constructions；3- capillary wicks；4- micro-channels；5- working media flow cavitys；6- flexible hands
Machine；7- chips；8- flexibility microflute group's heat abstractors.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to the drawings, the utility model is described in further detail.
Fig. 1 is flexible microflute group's heat abstractor outside drawing of a specific embodiment of the present utility model.Wherein 1 is chamber
Body, Section A-A figure is as shown in Figure 2；Section B-B figure is as shown in Figure 3.Whole device includes evaporator section, adiabatic section and condensation segment.
Fig. 2 is flexible microflute group's heat abstractor Section A-A figure of a specific embodiment of the present utility model, and Fig. 3 is this
Flexible microflute group's heat abstractor section B-B figure of one specific embodiment of utility model, with reference to Fig. 2 and Fig. 3 flexible microflute
Group's heat abstractor, including cavity 1, rib block supporting construction 2, capillary wick 3；Wherein, cavity 1 is closed cavity, and the material of cavity 1 is soft
Property heat conducting nano composite material, thermal conductivity factor is high, and the capacity of heat transmission of flexible nano composite is significantly larger than other such as polypropylene
Deng material, the thermal resistance of evaporator section and condensation segment can be reduced, strengthens the heat exchange property of heat abstractor；1 inwall of cavity two is relative
A plurality of micro-channel 4 is carved on surface, constitutes microflute group, and working medium is absorbed into micro-channel, and the shape in micro-channel under capillary force effect
The continuous liquid film distribution that the composite phase-change that evaporates and seethe with excitement into high intensity micro-scale exchanges heat, this liquid film distribution has superpower take
Heat energy power, takes hot heat flow density up to 109W/m2Magnitude, and take thermal process idle, energy-conserving and environment-protective.It is rib block in the middle of cavity
Supporting construction 2, rib block supporting construction 2 is flexible material, the laminating for preventing the upper microflute group of two apparent surfaces, the He of cavity 1
Rib block supporting construction 2, which is combined, builds steam channel, and for steam circulation, reduce steam transports resistance；Capillary wick 3 is fixed on
In the middle of microflute group and rib block supporting construction 2, for withdrawing fluid.
Wherein, the material of cavity 1 is flexible heat conducting nano composite material, by high molecular polymer mixing high heat conducting nano
Granular materials, carbon fiber or CNT etc. are made, and wherein high molecular polymer is polypropylene, PET, PMDS, LCP, polyamides Asia
Amine or FR4.
Wherein, the rib block supporting construction 2 is made up of silica gel or rubber.
Wherein, the capillary wick 3 is made up of copper mesh or the copper capillary wick of sintering that working out.
Wherein, the size of micro-channel 4 is micron order.
Wherein, working media during flexible microflute group heat abstractor work is filled in working media flow cavity 5.
Wherein, the working media is methanol, absolute ethyl alcohol, acetone or distilled water.
Fig. 4 is two part schematic diagrames for overall cavity, as shown in figure 4, whole heat abstractor cavity is by A, B two
Part cavity is combined into, A, and B two parts cavitys are the cavitys of B-B directions part as shown in Figure 1, A, and B two parts can be
Realize that two parts heat connects in the way of bonding in the form of fluid sealant or using heat, so as to keep the sealing of whole cavity
Performance.
In the present embodiment, the material of cavity 1 is using phenolic resin as matrix, the multi-walled carbon nanotube of mixing filling wherein
And micron grade carbon fiber (CFs) builds flexible heat conducting nano composite material (MWCNTs).Multi-walled carbon nanotube can be in carbon fiber
Between form heat conduction and build bridge, isolated carbon fiber can be connected to form high-efficiency heat conduction network chain, strengthening material heat conductivility.
Using flexible heat conducting nano composite material, two halves cavity is molded using the method for hot pressing.In the present embodiment, the material of capillary wick 3 is
Copper mesh, for the copper mesh of cut out 500 mesh is closely pasted in two halves cavity respectively, copper mesh can be cold by condensation segment
When solidifying liquid is back to evaporator section, particularly heat abstractor horizontal positioned, more need to install copper mesh additional.Other copper wire herein
Two layers of net patch, further strengthens liquid reflux capability.The rib block supporting construction 2 that silica gel is made is pasted in the middle of cavity again, prevented
Only under low pressure, the paste on wall of the upper microflute group of two apparent surfaces of cavity is combined together, while unimpeded steam channel is built, drop
Lower steam dynamic resistance, the heat exchange performance of heat radiation device.Two halves cavity fluid sealant is pasted together again, sealing is taken out
Vacuum.Finally inject working medium and seal liquid injection port.Working medium can select the plurality of liquid such as methanol, absolute ethyl alcohol, distilled water, working medium
Selection be contemplated that its whether react with cavity material or internal material with boiling point height, it is suitable to select according to actual needs
Working medium.In this example, working medium selection distilled water.
Wherein, under capillary force effect, working medium is inhaled into microflute, and the formation high intensity micro-scale evaporation in micro-channel
With the continuous liquid film distribution of boiling composite phase-change heat exchange.The heat of heater enters the microflute of inner cavity surface in cavity evaporating area
Working medium composite phase-change takes away amount of heat in road, micro-channel, so as to realize that heater is cooled down.
Wherein, the rib block supporting construction in the middle of cavity is silica gel material, because cavity material is flexible material, when vacuumizing
When, the presence of rib block supporting construction can prevent above and below wall fit together, build steam channel, the steam channel can drop
Low steam transports resistance.Rib block supporting construction is also flexible material simultaneously, and inhibition is not present in the bending to heat abstractor.
Wick structure is fixed on lower wall surface, under capillary force effect, withdrawing fluid.If heat abstractor is placed vertically
When, wick structure can be removed, be that liquid working substance backflow can be achieved by Action of Gravity Field.Wick structure is settable one layer,
It may also set up multilayer.
Fig. 5 is a flexible microflute group heat abstractor cooling euthermic chip structural representation.In the diagram, flexible microflute group
Heat abstractor is located in inside flexible mobile phone 6, and euthermic chip 7 is arranged on where the flexible top of microflute group heat abstractor 8, chip
Position is that working medium is undergone phase transition after absorbing heat in the evaporation ends of flexible microflute group heat abstractor, evaporation ends micro-channel, working medium by
Liquid is changed into gaseous state, in the steam channel in cavity, and working medium is transported to condensation end heat release and is changed into liquid again, in cavity inner wall
In the presence of middle copper mesh and the dual capillary force of micro-channel, liquid working substance is sucked back into evaporation ends, recirculates.
Particular embodiments described above, has carried out entering one to the purpose of this utility model, technical scheme and beneficial effect
Step is described in detail, it should be understood that be the foregoing is only specific embodiment of the utility model, is not limited to this reality
With new, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements done etc. all should be included
Within protection domain of the present utility model.
Claims (7)
1. a kind of flexible microflute group heat abstractor, including cavity (1), rib block supporting construction (2), capillary wick (3)；Its feature exists
In,
Cavity (1) is closed cavity, and cavity (1) material is flexible heat conducting nano composite material, and thermal conductivity factor is high, in cavity (1)
It is rib block supporting construction (2), rib block support knot that two apparent surfaces, which are carved with the middle of a plurality of micro-channel (4), composition microflute group, cavity,
Structure (2) is flexible material, the laminating for preventing the upper microflute group of two apparent surfaces；
Cavity (1) and rib block supporting construction (2), which are combined, builds steam channel, for steam circulation；
Capillary wick (3) is fixed in the middle of microflute group and rib block supporting construction (2), for withdrawing fluid.
2. flexible microflute group heat abstractor according to claim 1, it is characterised in that cavity (1) material is flexibility
Heat conducting nano composite material, is made up of high molecular polymer mixing high heat conducting nano granular materials, carbon fiber or CNT etc.,
Wherein high molecular polymer is polypropylene, PET, PMDS, LCP, polyimides or FR4.
3. flexible microflute group heat abstractor according to claim 1, it is characterised in that the rib block supporting construction (2) by
Silica gel or rubber are made.
4. flexible microflute group heat abstractor according to claim 1, it is characterised in that the capillary wick (3) is by what is worked out
The copper capillary wick of copper mesh or sintering is made.
5. flexible microflute group heat abstractor according to claim 1, it is characterised in that micro-channel (4) size is micro-
Meter level.
6. flexible microflute group heat abstractor according to claim 1, it is characterised in that flexible microflute group heat abstractor work
When working media be filled in working media flow cavity (5).
7. flexible microflute group heat abstractor according to claim 6, it is characterised in that the working media is methanol, nothing
Water-ethanol, acetone or distilled water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720101879.8U CN206442652U (en) | 2017-01-26 | 2017-01-26 | A kind of flexible microflute group heat abstractor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720101879.8U CN206442652U (en) | 2017-01-26 | 2017-01-26 | A kind of flexible microflute group heat abstractor |
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| CN206442652U true CN206442652U (en) | 2017-08-25 |
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| CN201720101879.8U Expired - Fee Related CN206442652U (en) | 2017-01-26 | 2017-01-26 | A kind of flexible microflute group heat abstractor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107771011A (en) * | 2017-09-28 | 2018-03-06 | 深圳市英威腾电气股份有限公司 | A kind of flexible phase-change heat radiating device |
| CN108168345A (en) * | 2018-02-11 | 2018-06-15 | 中国科学院工程热物理研究所 | For the heat sink and its manufacturing method under superelevation heat flow density |
| CN108235666A (en) * | 2018-02-11 | 2018-06-29 | 中国科学院工程热物理研究所 | Surface regulation and control flexible microflute group is heat sink, radiator and method |
| CN108366508A (en) * | 2017-01-26 | 2018-08-03 | 中国科学院工程热物理研究所 | A kind of flexibility microflute group's radiator |
| CN110260175A (en) * | 2019-06-24 | 2019-09-20 | 南京汉德森科技股份有限公司 | A kind of efficient outdoor LED lamp with heat management radiator structure |
| CN108366508B (en) * | 2017-01-26 | 2024-06-28 | 中国科学院工程热物理研究所 | Flexible micro-groove group heat dissipation device |
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2017
- 2017-01-26 CN CN201720101879.8U patent/CN206442652U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108366508A (en) * | 2017-01-26 | 2018-08-03 | 中国科学院工程热物理研究所 | A kind of flexibility microflute group's radiator |
| CN108366508B (en) * | 2017-01-26 | 2024-06-28 | 中国科学院工程热物理研究所 | Flexible micro-groove group heat dissipation device |
| CN107771011A (en) * | 2017-09-28 | 2018-03-06 | 深圳市英威腾电气股份有限公司 | A kind of flexible phase-change heat radiating device |
| CN108168345A (en) * | 2018-02-11 | 2018-06-15 | 中国科学院工程热物理研究所 | For the heat sink and its manufacturing method under superelevation heat flow density |
| CN108235666A (en) * | 2018-02-11 | 2018-06-29 | 中国科学院工程热物理研究所 | Surface regulation and control flexible microflute group is heat sink, radiator and method |
| CN108235666B (en) * | 2018-02-11 | 2024-03-01 | 中国科学院工程热物理研究所 | Surface-regulated flexible micro-groove group heat sink, heat dissipation device and method |
| CN110260175A (en) * | 2019-06-24 | 2019-09-20 | 南京汉德森科技股份有限公司 | A kind of efficient outdoor LED lamp with heat management radiator structure |
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Granted publication date: 20170825 Termination date: 20210126 |