CN105222629B - Self-excitation type phase change thermal control cooling system - Google Patents
Self-excitation type phase change thermal control cooling system Download PDFInfo
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- CN105222629B CN105222629B CN201510709078.5A CN201510709078A CN105222629B CN 105222629 B CN105222629 B CN 105222629B CN 201510709078 A CN201510709078 A CN 201510709078A CN 105222629 B CN105222629 B CN 105222629B
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- control cooling
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Abstract
The invention provides a self-excitation type phase change thermal control cooling system. The system comprises a heat taking evaporation module and a condensation cooling module, wherein a closed cavity for filling a working medium is formed therebetween; the heat taking evaporation module is positioned at one end part of the closed cavity, and consists of a heat taking baseplate and an evaporation end surface microstructure; and the evaporation end surface microstructure is arranged on an inner end surface of the heat taking baseplate. The system further comprises a capillary micro straight groove and a liquid accumulation and liquid supply groove ring; the condensation cooling module comprises a condensation side part and a condensation top plate; the condensation side part is positioned at the side edge of the closed cavity; the condensation top plate is positioned at the other end part of the closed cavity; and the inner end surfaces of the condensation side part and the condensation top plate are combined surfaces having a film liquid area and a dropping liquid area. As the capillary micro straight groove having high-strength phase change heat taking under fine scale is introduced, the critical heat flux density and the heat exchange coefficient are promoted, and the heat exchange capacity of a heat end is strengthened; and meanwhile, the drop type condensation is built at a condensation end for timely and effectively falling and updating drops, so that the condensation heat exchange effect is reinforced and promoted.
Description
Technical field
The present invention relates to a kind of autoexcitation formula phase transformation thermal control cooling system.
Background technology
Heat management for tens of watts every square centimeter or even under hectowatt grade above high heat flux, traditional air-cooled technology
Need to arrange in pairs or groups large-area radiating fin, radiating module both bulk；Although liquid refrigeration technique can meet requirement to a certain extent,
The active techniques such as pumping pump must be used, and setting etc. is built to pipeline has specific requirement.Therefore, it is necessary to seek suitable chi
Very little efficient heat transfer technology.
Phase transformation thermal control technology is the efficient heat transfer technology of a class, and what is utilized is Transformation Principle, orders about heat by hot junction heat absorption
Side working medium evaporation, produces liquid gas phase transition and draws hot junction heat, and then order about its motion by steam pressure difference, reach radiating condensation
Behind end, there is liquid-gas phase transition and then discharge heat.This kind of technology it is critical only that the evaporation exchange capability of heat in hot junction, condensation end are changed
Heat energy power and filling Efficient Cycle of the working medium between cold and hot end.But the exchange capability of heat in evaporation hot junction, the heat exchange of condensation end at present
Ability and condensed fluid reflux type need to be improved.
The content of the invention
The technical problem to be solved in the present invention, is to provide a kind of autoexcitation formula phase transformation thermal control cooling system. by drawing
Enter to possess the micro- straight trough of capillary that high intensity phase transformation takes heat under micro-scale, realize under minute yardstick (referring generally to less than below 1mm)
Phase-change heat transfer, micro-scaled structures are coupled with the phase transformation thermal control system of nucleate boiling and evaporation by being formed, while lifting critical heat
Current density and the coefficient of heat transfer, and then the exchange capability of heat in hot junction is enhanced, while dropwise condensation is built in condensation end, can be timely and effective
Drop is come off and updates, so as to strengthen and be lifted condensing heat-exchange effect.
What the present invention was realized in：A kind of autoexcitation formula phase transformation thermal control cooling system, including taking thermal evaporation module and cold
Solidifying radiating module, described taking formed for filling the closed cavity for filling working medium between thermal evaporation module and condensation radiating module,
It is characterized in that：It is described take thermal evaporation module positioned at closed cavity one end, and by take hot base plate and evaporation end face micro structure
Composition, the evaporation end face micro structure are located at the inner face for taking hot base plate, and including the micro- straight trough of capillary and store liquid feed flow grooved ring；It is described
Condensation radiating module includes condensing sidepiece and condensation top board, and the condensation side is in the side of closed cavity, the condensation top
Plate is located at the other end of closed cavity, and the condensation sidepiece and the inner face of condensation top board be film liquid area and dropping liquid it is interval every
It is alternately arranged the surface for combining.
Wherein, the micro- straight trough quantity of the capillary is for multiple, and parallel is uniformly distributed；The storage liquid feed flow grooved ring is ring junction
Structure, is located at around the micro- straight trough of capillary.
Wherein, the surface of the micro- straight trough of the capillary is roughened surface.The micro- straight trough of the capillary is from two ends notch to groove stage casing
For gradually wide mode.50%-90% of the width of rebate of the micro- straight trough of the capillary for groove intermediate width.The micro- straight trough parting face of capillary is
Tetragon or triangle.
Wherein, the ring footpath for storing liquid feed flow grooved ring is not less than 1mm.
Wherein, the film liquid area and dropping liquid are interval every being alternately arranged.The width in the film liquid area is not more than 2mm, and area is accounted for
Compare 5-50%.The condensation top board inner face is radially inclined, and horizontal tilt angle is 5 ~ 20 °.The condensation sidepiece and condensation top board
Emitting shape radiating fin of the outside with integration.
Wherein, the aggregate surface for it is following any one：
1st kind：In aggregate surface, dropping liquid area is hydrophobic region, and film liquid area is hydrophilic area；
2nd kind：In aggregate surface, dropping liquid area is hydrophilic area, and film liquid area is super hydrophilic area；
3rd kind：In aggregate surface, dropping liquid area is super-hydrophobic area, and film liquid area is hydrophilic area；
4th kind：In aggregate surface, dropping liquid area is super-hydrophobic area, and film liquid area is super hydrophilic area.
Wherein, liquid substance of the filling working medium for one-component, or for two kinds and two or more multi-component liquid
Body material., under 0 ~ 0.1MPa air pressure environment, its boiling point is at 30-95 DEG C for the liquid substance.
The invention has the advantages that：
1st, take thermal evaporation module and introduce the micro- straight trough of capillary, realize the phase-change heat transfer under minute yardstick, micro-scaled structures pass through shape
Into the phase transformation thermal control system for being coupled with nucleate boiling and evaporation, while lifting critical heat flux density and the coefficient of heat transfer, and then strengthen
The exchange capability of heat in hot junction.The micro- straight trough of roughening capillary, further lifts boiling heat transfer coefficient, reduces the degree of superheat in hot junction.Introduce
Liquid feed flow grooved ring is stored, the accumulation of condensing reflux drop is realized, and lasting fluid supply capacity is formed to the micro- straight trough of capillary, it is to avoid liquid film is done
Dry up；
2nd, condensation mode of the radiating module by adjusted design condensing surface vapour-liquid is condensed, the drop-wise for building condensing surface is cold
It is solidifying, cooling energy recovery can be strengthened, condensation efficiency is lifted, improved condensation effect.It is provided simultaneously with the mixed of film liquid area and dropping liquid area
Miscellaneous surface or aggregate surface can realize that the liquid core to condensing droplet quantifies to generate the timely and effective renewal that comes off with drop, so as to
Strengthen and lifted condensing heat-exchange effect.
Description of the drawings
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the axial section structural representation of autoexcitation formula phase transformation thermal control cooling system of the present invention.
Fig. 2 is the structural representation of the evaporation ends micro structure that thermal evaporation module is taken in the present invention.
Fig. 2 a and Fig. 2 b is respectively a kind of section structure schematic diagram of the micro- straight trough of capillary in the present invention.
Fig. 3 is the structural representation of the condensation top board inner face of condensation radiating module in the present invention.
Fig. 4 is the condensation sidepiece inner face deployed condition structural representation of condensation radiating module in the present invention.
Fig. 5 is the external structure schematic diagram of condensation one embodiment of radiating module in the present invention.
Specific embodiment
Refer to Fig. 1 to Fig. 4, the autoexcitation formula phase transformation thermal control cooling system of the present invention, including taking thermal evaporation module 1 and cold
Solidifying radiating module 2, described taking formed between thermal evaporation module 1 and condensation radiating module 2 for filling the closing for filling working medium sky
Chamber 3, the one end for taking thermal evaporation module 1 positioned at closed cavity 3, and by taking 12 groups of hot base plate 11 and evaporation end face micro structure
Into the evaporation end face micro structure 12 is located at the inner face for taking hot base plate 11, and including the micro- straight trough 121 of capillary and stores liquid feed flow grooved ring
122。
It is main as shown in Fig. 2 micro- 121 quantity of straight trough of the capillary is multiple, and it is parallel be uniformly distributed, two adjacent capillarys are micro-
Straight trough 121 is separated by conduit partition 123；The storage liquid feed flow grooved ring 122 is loop configuration, is located at the micro- straight trough of capillary 121
Around.
The surface of the micro- straight trough of the capillary 121 is roughened surface.The micro- straight trough of the capillary 121 is from two ends notch to groove stage casing
For gradually wide mode.50%-90% of the width of the two ends notch of the micro- straight trough of the capillary for groove intermediate width.Such as Fig. 2 a and Fig. 2 b
Shown, micro- 121 parting face of straight trough of capillary is tetragon or triangle.The ring footpath D for storing liquid feed flow grooved ring 122 is not less than 1mm.
The condensation radiating module 2 includes condensing sidepiece 21 and condensation top board 22, and it is empty that the condensation sidepiece 21 is located at closing
The side in chamber 3, the condensation top board 22 are located at the other end of closed cavity 3, and the condensation sidepiece 21 and condensation top board 22
Inner face be the aggregate surface C with film liquid area A and dropping liquid area B.
Wherein, the film liquid area A and dropping liquid area B alternate arrangement.The width of the film liquid area A is not more than 2mm, area
Accounting 5-50%, the i.e. area of film liquid area A are the 5-50% of film liquid area A and the dropping liquid area B gross areas.Condensation 22 inner face of top board
Radially incline, horizontal tilt angle θ is 5 ~ 20 °.
The aggregate surface for it is following any one：
1st kind：In aggregate surface C, dropping liquid area A is hydrophobic region, and film liquid area B is hydrophilic area；
2nd kind：In aggregate surface C, dropping liquid area A is hydrophilic area, and film liquid area B is super hydrophilic area；
3rd kind：In aggregate surface C, dropping liquid area A is super-hydrophobic area, and film liquid area B is hydrophilic area；
4th kind：In aggregate surface C, dropping liquid area A is super-hydrophobic area, and film liquid area B is super hydrophilic area.
As shown in figure 5, the condensation sidepiece 21 carries integrated emitting shape radiating fin 23 with the outside of condensation top board 22.
The filling working medium can be the liquid substance of one-component, or for two kinds and two or more multi-component liquid
Material., under 0 ~ 0.1MPa air pressure environment, its boiling point is at 30-95 DEG C for the liquid substance.
Take thermal evaporation module-principle and effect：
By the miniaturization (referring generally to less than below 1mm) on physical size, the heat transfer under micro-scale possesses " anti-
Superpower heat-transfer character often ", can meet the thermal management requirements under high density hot-fluid well.The minute yardstick of Microchanneled structure in
Under high density hot-fluid, the heat-transfer character of protrusion comes from evaporation and the sheet in thin liquid film area in the working medium meniscus formed in evaporation ends
Caused by levying the nucleate boiling collective effect in thick film area, it is merely not the pure evaporation profiles in thin liquid film area.In phase transformation thermal control body
In system, what the nucleate boiling at enhanced water evaporation end can be substantially improved evaporation hot junction takes hot exchange capability of heat.Therefore：
1. the micro- straight trough of capillary that high intensity phase transformation takes heat is possessed in the case where thermal evaporation module introducing micro-scale is taken, it is possible to achieve
Phase-change heat transfer under minute yardstick, micro-scaled structures are coupled with the phase transformation thermal control system of nucleate boiling and evaporation by being formed, while
Critical heat flux density and the coefficient of heat transfer are lifted, and then enhances the exchange capability of heat in hot junction；
2. the micro- straight trough of roughening capillary, can further lift boiling heat transfer coefficient, reduce the degree of superheat in hot junction；
3. introduce and store liquid feed flow grooved ring, be capable of achieving the accumulation of condensing reflux drop, and the micro- straight trough of capillary is formed persistently supply
Liquid energy power, it is to avoid liquid film dries up.
Condensation radiating module-principle and effect：
When vapourss touch supercool metal surface, liquid-gas phase transition condensation will occur.Vapour-liquid condensation on the surface is logical
Carry out usually through two kinds of condensation mode mechanism, be film condensation and dropwise condensation respectively.For condensing heat-exchange efficiency or coefficient,
Dropwise condensation will be significantly higher than film condensation, typically be higher by the 1-2 order of magnitude.Therefore, by adjusted design condensing surface vapour-liquid
Condensation mode, build the dropwise condensation of condensing surface, can strengthen cooling energy recovery, lift condensation efficiency, improve condensation
Effect.
Dropwise condensation relates generally to liquid karyogenesis, the critical process such as merger and droplet detachment of growing up.Generally, film liquid area
（The drop zone formed by film condensation）More conducively a large amount of generations of liquid core with merge merger between drop；Dropping liquid area（By drop-wise
The drop zone that condensation is formed）The more conducively formation of droplet and the renewal that comes off of drop.But, simple film liquid surface exists bright
Aobvious liquid film barrier layer, and there is generation liquid core on the low side in simple dropping liquid surface, the coefficient of heat transfer of the condensing surface of the two is equal
It is relatively poor.Therefore, the mixed surface or aggregate surface for being provided simultaneously with film liquid area and dropping liquid area can be realized to condensing droplet
Liquid core quantifies to generate the timely and effective renewal that comes off with drop, so as to strengthen and be lifted condensing heat-exchange effect.The condensation of the present invention
Radiating module is based on surface and interface tension gradient effect, by the interfacial characteristics for designing condensing surface, builds film liquid area, dropping liquid area simultaneously
The aggregate surface deposited.Dropping liquid area forms droplet and controls droplet detachment and updates critical dimension size, and film liquid area forms gradient circle
Face basis, and draw dropping liquid area critical droplet and form apocenosis passage.Aggregate surface realizes the liquid core of condensing droplet and quantifies to generate
With the timely and effective renewal that comes off of drop, condensing heat-exchange is enhanced.
The course of processing of autoexcitation formula phase transformation thermal control cooling system of the present invention is as follows：
1. thermal evaporation module is taken
1.1 evaporation end face micro structures
By the micro structure manufacturing process such as cut or wire cutting, process on hot base plate the micro- straight trough of capillary, storage taking
Liquid feed flow grooved ring, obtains preliminary evaporation end face micro structure；
1.2 roughening are processed
Further by wet method roughening technology, then by cleaning, drying etc., it is eventually formed in and takes on hot base plate with steaming
Originator face micro structure takes thermal evaporation module；
2. radiating module is condensed
2.1 condensation top board inner faces, the aggregate surface of condensation sidepiece inner face（The making of aggregate surface contains 4 kinds of feelings
Shape）：
1st kind of aggregate surface：Hydrophobic region is made on condensation top board inner face, with the parent that hydrophobic region is not formed on inner face
Pool, collectively forms the aggregate surface that parent/hydrophobic region is spaced apart, i.e., in this aggregate surface, dropping liquid area is formed by hydrophobic region, film
Liquid zone is formed by hydrophilic area；The aggregate surface of condensation sidepiece inner face can be obtained in the same manner；
2nd kind of aggregate surface：Super hydrophilic area is made on condensation top board inner face, with super hydrophilic area is not formed on inner face
Hydrophilic area, in collectively forming the aggregate surface that parent/super hydrophilic area is spaced apart, i.e. this aggregate surface, dropping liquid area is by hydrophilic area shape
Into film liquid area is formed by super hydrophilic area；The aggregate surface of condensation sidepiece inner face can be obtained in the same manner；
3rd kind of aggregate surface：Super-hydrophobic area is made on condensation top board inner face, with super-hydrophobic area is not formed on inner face
Hydrophilic area, in collectively forming the aggregate surface that parent/super-hydrophobic area is spaced apart, i.e. this aggregate surface, dropping liquid area is by super-hydrophobic area
Formed, film liquid area is formed by hydrophilic area；The aggregate surface of condensation sidepiece inner face can be obtained in the same manner；
4th kind of aggregate surface：Super-hydrophobic area is made on condensation top board inner face, with super-hydrophobic area is not formed on inner face
Super hydrophilic area, collectively form the aggregate surface that super close/super-hydrophobic area is spaced apart, i.e., in this aggregate surface, dropping liquid area is by super thin
Pool is formed, and film liquid area is formed by super hydrophilic area；The aggregate surface of condensation sidepiece inner face can be obtained in the same manner；
3. welded seal
Thermal evaporation module, condensation radiating module will be taken using solder technology carries out welded seal；
4. perfusion filling working medium is evacuated
Using vaccum-pumping equipment exhaust, perfusion filling working medium carries out hot junction heating, is subsequently vacuumed out, circulating-heating with
Vacuum, the heat abstractor until above-mentioned making can normally till startup optimization.
Although the foregoing describing the specific embodiment of the present invention, those familiar with the art should manage
Solution, the specific embodiment described by us are merely exemplary, rather than for the restriction to the scope of the present invention, are familiar with this
The technical staff in field should be covered the present invention's in the equivalent modification and change made according to the spirit of the present invention
In scope of the claimed protection.
Claims (13)
1. a kind of autoexcitation formula phase transformation thermal control cooling system, including thermal evaporation module and condensation radiating module is taken, described to take hot steaming
Send out, it is characterised in that：It is described to take hot steaming
The one end that module is located at closed cavity is sent out, and is constituted by taking hot base plate and evaporating end face micro structure, the evaporation end face micro structure
The inner face for taking hot base plate is located at, and including the micro- straight trough of capillary and stores liquid feed flow grooved ring；The condensation radiating module includes condensation
Sidepiece and condensation top board, the condensation side is located at the another of closed cavity in the side of closed cavity, the condensation top board
End, and the condensation sidepiece and the inner face of condensation top board are that film liquid area and dropping liquid are interval every being alternately arranged the table that combines
Face.
2. autoexcitation formula phase transformation thermal control cooling system according to claim 1, it is characterised in that：The micro- straight trough number of the capillary
Measure as multiple, and parallel be uniformly distributed；The storage liquid feed flow grooved ring is loop configuration, is located at around the micro- straight trough of capillary.
3. autoexcitation formula phase transformation thermal control cooling system according to claim 1, it is characterised in that：The micro- straight trough of the capillary
Surface is roughened surface.
4. the autoexcitation formula phase transformation thermal control cooling system according to any one of claims 1 to 3, it is characterised in that：The hair
Trickle straight trough is gradually wide mode from two ends notch to groove stage casing.
5. autoexcitation formula phase transformation thermal control cooling system according to claim 4, it is characterised in that：The micro- straight trough of the capillary
50%-90% of the width of rebate for groove intermediate width.
6. the autoexcitation formula phase transformation thermal control cooling system according to any one of claims 1 to 3, it is characterised in that：Capillary is micro-
Straight trough parting face is tetragon or triangle.
7. autoexcitation formula phase transformation thermal control cooling system according to claim 1 and 2, it is characterised in that：The storage liquid feed flow
The ring footpath of grooved ring is not less than 1mm.
8. autoexcitation formula phase transformation thermal control cooling system according to claim 1, it is characterised in that：The width in the film liquid area
No more than 2mm, area accounting 5-50%.
9. autoexcitation formula phase transformation thermal control cooling system according to claim 1, it is characterised in that：The condensation top board is inner
Face radially inclines, and horizontal tilt angle is 5 ~ 20 °.
10. autoexcitation formula phase transformation thermal control cooling system according to claim 1, it is characterised in that：It is described condensation sidepiece with
Emitting shape radiating fin with integration on the outside of condensation top board.
11. autoexcitation formula phase transformation thermal control cooling systems according to claim 1, it is characterised in that：The aggregate surface is
It is following any one：
1st kind：In aggregate surface, dropping liquid area is hydrophobic region, and film liquid area is hydrophilic area；
2nd kind：In aggregate surface, dropping liquid area is hydrophilic area, and film liquid area is super hydrophilic area；
3rd kind：In aggregate surface, dropping liquid area is super-hydrophobic area, and film liquid area is hydrophilic area；
4th kind：In aggregate surface, dropping liquid area is super-hydrophobic area, and film liquid area is super hydrophilic area.
12. autoexcitation formula phase transformation thermal control cooling systems according to claim 1, it is characterised in that：It is described filling working medium be
The liquid substance of one-component, or for two kinds and two or more multi-component liquid substances.
13. autoexcitation formula phase transformation thermal control cooling systems according to claim 12, it is characterised in that：The liquid substance exists
Under 0 ~ 0.1 MPa air pressure environment, its boiling point is at 30-95 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510709078.5A CN105222629B (en) | 2015-10-28 | 2015-10-28 | Self-excitation type phase change thermal control cooling system |
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| CN201510709078.5A CN105222629B (en) | 2015-10-28 | 2015-10-28 | Self-excitation type phase change thermal control cooling system |
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| CN105222629B true CN105222629B (en) | 2017-04-19 |
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| CN109539846A (en) * | 2018-11-23 | 2019-03-29 | 西安交通大学 | A kind of flat-plate heat pipe with gradient wetting structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022936A (en) * | 2010-11-12 | 2011-04-20 | 北京工业大学 | Improved high-efficiency unidirectional heat transfer pipe used for heat dissipation of microelectronics |
| CN103307579A (en) * | 2013-06-13 | 2013-09-18 | 南京航空航天大学 | Method for improving heat radiating efficiency of LED lighting source and integrated radiator |
| CN205102648U (en) * | 2015-10-28 | 2016-03-23 | 福建中科芯源光电科技有限公司 | Autoexcitation formula heat of transformation accuse cooling system |
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| US8710526B2 (en) * | 2011-08-30 | 2014-04-29 | Abl Ip Holding Llc | Thermal conductivity and phase transition heat transfer mechanism including optical element to be cooled by heat transfer of the mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022936A (en) * | 2010-11-12 | 2011-04-20 | 北京工业大学 | Improved high-efficiency unidirectional heat transfer pipe used for heat dissipation of microelectronics |
| CN103307579A (en) * | 2013-06-13 | 2013-09-18 | 南京航空航天大学 | Method for improving heat radiating efficiency of LED lighting source and integrated radiator |
| CN205102648U (en) * | 2015-10-28 | 2016-03-23 | 福建中科芯源光电科技有限公司 | Autoexcitation formula heat of transformation accuse cooling system |
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