CN102811590A - Wick structure for vapor chamber - Google Patents
Wick structure for vapor chamber Download PDFInfo
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- CN102811590A CN102811590A CN2012102715989A CN201210271598A CN102811590A CN 102811590 A CN102811590 A CN 102811590A CN 2012102715989 A CN2012102715989 A CN 2012102715989A CN 201210271598 A CN201210271598 A CN 201210271598A CN 102811590 A CN102811590 A CN 102811590A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
- H01L23/473—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing liquids
Abstract
The invention discloses a wick structure for a vapor chamber. The wick structure comprises multiple condensing zones radiating from center to outside, each condensing zone is formed by a multistage channel structure formed by branching step-by-step from a central beginning channel to outside, each stage comprises at least two narrow channels, the number of the narrow channels in each stage increases from center to outside stage-by-stage, the narrow channels in each stage and the narrow channels among stages are mutually communicated to enable each condensing zone to form a latticed channel structure, the width of the narrow channels of a next stage is smaller than that of the narrow channels of a front stage, and the length of the narrow channels of a next stage is smaller than or equal to that of the narrow channels of a front stage. The wick structure for the vapor chamber has the advantages of high capillary attraction, low flow resistance and high temperature evenness and heat radiating efficiency.
Description
Technical field
The present invention relates to soaking plate, be specifically related to the liquid sucting core structure of soaking plate.
Background technology
Along with the high-performance electronic continuous advancement in technology, require electronic device operation high speed and structure dimension microminiaturized in the practical application.In the operation high speed and structure dimension microminiaturization of electronic device, highly integrated electronic device must cause higher density of heat flow rate.Therefore, heat dissipation problem has become the bottleneck of restriction electronic technology development.
Present soaking plate has been widely used in as a kind of heat abstractor efficiently in the middle of the heat radiation of electronic device, and than traditional heat dissipation technology, the soaking plate radiating efficiency is high, and uniform temperature is good.Soaking plate mainly comprises evaporation part and condensation part and heat radiation working medium, and liquid refrigerant is the evaporation of heat absorption back in the evaporation part, arrives condensation heat release behind the condensation part, and by outside heat sinks heat is taken away; Condensed working medium is carried go back to the evaporation part through liquid sucting core structure.Wherein, liquid sucting core structure is a capillary structure, through capillary attraction condensate liquid is carried go back to the evaporation part.Liquid sucting core structure is divided into powder sintered and silk screen sintering class wick and conduit class suction core in the prior art, and wherein, powder sintered and silk screen sintering class wick forms through powder sintered or silk screen sintering, and the pore in it connects into capillary flow path; The conduit class is inhaled core and is formed through parallel conduit is set on matrix; Deficiency below prior art exists:
1, powder sintered and silk screen sintering class wick, because the pore radius is little, capillary pressure is big, so flow resistance is big, and permeability is little, and radiating efficiency is not high.
2, conduit class wick, permeability is big, but capillary pressure is little, can not enough backflow power be provided to working medium, will reduce the radiating efficiency of soaking plate.
3, conduit class wick causes localized hyperthermia because conduit is separate laterally arranging after local the obstruction, and average temperature performance is relatively poor.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide that a kind of capillary attraction is big, flow resistance is little and the liquid sucting core structure of the soaking plate that average temperature performance is good.
The object of the invention is realized through following technical scheme:
A kind of liquid sucting core structure of soaking plate; Comprise a plurality of by the center to extraradial condensing zone; Each condensing zone is made up of the multistage channel structure that the outside bifurcated step by step of the origin or beginning conduit that is positioned at the center forms; Each level comprises at least two stria roads, and the quantity in middle stria roads at different levels is outwards increased by the center step by step; Being interconnected between the stria road in each grade and between the stria road at different levels makes each condensing zone form network-like channel structure;
The width in the stria road of said back one-level is less than the width in the stria road of previous stage, and the length in the stria road of back one-level is less than or equal to the length in the stria road of previous stage.
A preferred version of the liquid sucting core structure of soaking plate of the present invention wherein, is provided with by the outward extending straight channel in center between said adjacent two condensing zones, and the width of this straight channel is greater than the width in each bar stria road in the condensing zone; The both sides of said straight channel are provided with interface channel strias at different levels road in said adjacent two condensing zones are connected on the straight channel, and the width of said interface channel is less than the width of straight channel.
Adopt the purpose of above-mentioned preferred version to be, if be not communicated with between the strias at different levels road of adjacent two condensing zones, thereby the liquid refrigerant of both adjoins regions can't flow and causes localized hyperthermia so; Influence average temperature performance, and after adopting above-mentioned technical scheme, because the width of straight channel is greater than the width of stria road and interface channel; Therefore the liquid refrigerant in the stria road, both sides can be in capillary attraction effect current downflow to straight channel, and straight channel is because width is big, and flow resistance is little; Play the effect of quickening transportation working medium; Thereby the adjoins region to adjacent two condensing zones dispels the heat, and prevents localized hyperthermia, improves uniform temperature and radiating efficiency.
Another preferred version of the liquid sucting core structure of soaking plate of the present invention, wherein, the ratio of the width in the stria road of back one-level and the width in previous stage stria road is greater than 0 less than 1, and preferred range is 0.6～0.8; The ratio of the length in the stria road of back one-level and the length in previous stage stria road is greater than 0 smaller or equal to 1, and preferred range is 0.6～0.8.Adopt above-mentioned preferred parameter, more help when increasing capillary pressure, effectively reducing fluid resistance.
Another preferred version of the liquid sucting core structure of soaking plate of the present invention, wherein, the angle of forking of said conduit is 0 °～120 °, preferred 45 °.Adopt above-mentioned angle value can reduce fluid resistance, help fluid and flow.
Another preferred version of the liquid sucting core structure of soaking plate of the present invention, wherein, from described origin or beginning conduit, each stria road homogeneous of each grade is divided into two, and the stria road behind the bifurcated is bent into parastate and stretches out; In four stria roads telling with the adjacent two stria roads of one-level, be merged into one after in the middle of being positioned at two are intersected, make the quantity in stria road of back one-level Duo one than the quantity in the stria road of previous stage; Adjacent stria roads at different levels are connected to end and form polygonal network shape channel structure.
Another preferred version of the liquid sucting core structure of soaking plate of the present invention wherein, is separated by concentric circular arc passage between the channel structure at different levels; From described origin or beginning conduit, each stria road homogeneous of each grade is divided into two, the stria road of upper level extend out to and this level and next stage between the circular arc conduit intersect, each intersection point is branched into two stria roads and forms the next stage channel structure; Said stria road at different levels and circular arc passage are interconnected and form network-like channel structure.
Another preferred version of the liquid sucting core structure of soaking plate of the present invention, wherein, from described origin or beginning conduit, each stria road homogeneous of each grade is divided into two, and the stria road behind the bifurcated is bent into parastate and stretches out; In four stria roads telling with the adjacent two stria roads of one-level, two in the middle of being positioned at link together through the horizontal channel; Said stria road at different levels and horizontal channel are interconnected and form network-like channel structure.
Another preferred version of the liquid sucting core structure of soaking plate of the present invention, wherein, the periphery of said a plurality of condensing zones is provided with the circular passage, and the stria road of the afterbody of each condensing zone is communicated with this circular passage.Adopt the purpose of this technical scheme to be, the liquid refrigerant in each condensing zone is pooled in the circular passage under the capillary attraction effect in multistage stria road, is back to the evaporation part again after being convenient to concentrate.
Another preferred version of the liquid sucting core structure of soaking plate of the present invention, wherein, described network-like channel structure is processed through on copper coin or aluminium sheet, utilizing the method for chemical corrosion.
The soaking plate that a kind of liquid sucting core structure of using above-mentioned soaking plate is processed; Comprise evaporation part and condensation part; Wherein, the condensation part is processed by described liquid sucting core structure, is provided with heat exchanger core in the evaporation part; The part that is surrounded by network-like channel structure in the said liquid sucting core structure forms support column, and this support column is supported on the heat exchanger core of evaporation part.Above-mentioned heat exchanger core is formed by powder sintered or sintering silk screen usually.
The present invention compared with prior art has following beneficial effect:
1, capillary attraction is big.Among the present invention; Because described condensing zone is made up of the multistage channel structure of the therefrom outer distribution of mind-set; The stria road quantity of back one-level more than the quantity in the stria road of upper level, form the network loop structure with the fractal characteristics of plant leaf vein between the strias at different levels road and with being interconnected between the one-level stria road, and the width in the stria road of back one-level is less than the width in the stria road of previous stage step by step; That is the stria road therefrom mind-set outside quantity increase gradually and width reduces gradually; Be formed with the vein shape structure that is beneficial to the increase capillary attraction, thereby improved capillary attraction greatly, improve radiating efficiency.
2, flow resistance is little.Among the present invention, the formed network loop of network-like channel structure of condensing zone is the structure that a kind of parallel connection adds series connection, and wherein parallel-connection structure can reduce flow resistance; In addition, in general, the stria road from the big top of width to the little end of width; Flow resistance can increase gradually, and the factor that influences flow resistance comprises the width and the length in stria road, and width is more little, length is long more; Flow resistance is just big more, and in the present invention, the stria road is divided into multistage; Be arranged to length as long as incite somebody to action the length in the stria road of back one-level, just can have further reduced flow resistance, make that the flow resistance of whole liquid sucting core structure is little less than the stria road of upper level.
3, be not easy to stop up.Among the present invention, stria roads at different levels are interconnected to form network-like channel structure, even therefore certain local location stops up, condensate liquid also can reflux through other passages, therefore can localized hyperthermia not occur because of obstruction.
4, average temperature performance is good.Among the present invention; Owing to be covered with the network-like stria road that is interconnected in the liquid sucting core structure, the each several part Homogeneouslly-radiating, even and local the obstruction localized hyperthermia can not appear; Therefore average temperature performance promotes greatly, and electronic component is avoided because of inhomogeneous the causing damage of dispelling the heat.
5, liquid sucting core structure of the present invention is because wick is the form of conduit; Its vertical cross-section also is equivalent to the Capillary Flow cross section; Condensate liquid can be done vertical backflow in conduit, that is condensate liquid can directly the sidewall along conduit be back to the evaporation part downwards from the condensation part.The wick of existing conduit form, conduit wherein laterally arranges and is not interconnected, and length direction pressure is less with respect to the present invention, though also can reflux in short transverse, capacity of returns is less; And the wick of existing silk screen and powder sintered type is that wick is layed on the soaking plate cavity wall shell, and is not whole soaking plate space, so cooling fluid must be done just can be back to the evaporation part after the backflow gathering radially; Therefore working medium back-flow velocity of the present invention is faster, and radiating efficiency is higher.
The intensity of the soaking plate of 6, being processed by liquid sucting core structure of the present invention is big.Several support columns only are set between the condensation part of existing soaking plate and the evaporation part usually to be supported; And among the present invention; The support column quantity that the part that is surrounded by network-like channel structure in the liquid sucting core structure of soaking plate forms is a lot; These support columns are supported on the heat exchanger core of evaporation part, make the intensity of whole soaking plate promote greatly.
It is emphasized that; Design of the present invention comes from the enlightenment of plant leaf vein polygonal network loop structure; Plant leaf vein polygonal network loop structure is as the selection of nature through the survival of the fittest in 1 years; Being evolved into the optimum structure that adapts to natural environment, is the optimal channel of heat and mass, and can prevent to cause the injury to plant leaf blade because of the obstruction of local vein.The liquid sucting core structure of soaking plate of the present invention is similar with plant leaf vein polygonal network loop structure, and its capillary attraction is big, flow resistance is little, the local beneficial effect that can not cause localized hyperthermia that stops up can obtain checking from the physiological action of plant leaf vein polygonal network loop structure.
Description of drawings
Fig. 1 is the structural representation of embodiment 1 of the liquid sucting core structure of soaking plate of the present invention.
Fig. 2 is the partial structurtes sketch map of Fig. 1.
Fig. 3 is the perspective view in stria of the present invention road.
Fig. 4 is the bifurcation structure sketch map in stria of the present invention road.
Fig. 5 is the flow schematic diagram of condensate liquid in the liquid sucting core structure of soaking plate of the present invention.
Fig. 6 is the structural representation of the soaking plate using liquid sucting core structure of the present invention and process.
Fig. 7 is the structural representation of network-like channel structure in the embodiments of the invention 2.
Fig. 8 is the structural representation of network-like channel structure in the embodiments of the invention 3.
Embodiment
Referring to Fig. 1～Fig. 4, the liquid sucting core structure of the soaking plate of present embodiment is arranged on the discoidal soaking wooden partition shell 8 that is made of copper, and this liquid sucting core structure comprises 15 fan-shaped condensing zones 7 by mind-set edge radiation in the soaking wooden partition shell 8.Each condensing zone 7 is made up of 12 grades of channel structure that the origin or beginning conduit that is positioned at the center 9 outside bifurcateds step by step form.Wherein, origin or beginning conduit 9 is a zero level, and zero level bifurcation I is divided into two, and the angle that makes the first order have between the stria road 3 of two stria road 3, two bifurcateds is 45 °, i.e. angle of forking θ
1Be 45 °, the stria road 3 of two bifurcateds is bent into parastate and stretches out; The bifurcation II in two stria roads 3 of the first order is divided into two angle of forking θ respectively
2Be 45 ° also, in four stria roads 3 behind the bifurcated, be merged into one after in the middle of being positioned at two are intersected, make the second level have three stria roads 3, these three stria roads 3 are bent into parastate and stretch out; The bifurcation III in partial three stria roads 3 also is divided into two, angle of forking θ
3Be 45 ° also, form six stria roads 3 behind the bifurcated, in the middle of being arranged in four are intersected in twos, and two of intersecting are merged into one, make the third level have four stria roads 3, and these four stria roads 3 are bent into parastate and stretch out; Similarly; The bifurcation homogeneous in the stria road 3 among backward at different levels is divided into two; In four stria roads 3 telling with the adjacent two stria roads 3 of one-level, be merged into one after in the middle of being positioned at two are intersected, and parallelly with other stria roads 3 stretch out; Angle of forking is 45 °, makes the quantity in stria road 3 of each grade Duo one (referring to Fig. 4) than the quantity of previous stage.Because the stria road 3 of each grade is formed by the upper level bifurcated; And two of intersecting behind stria road 3 bifurcateds at the corresponding levels are merged into one; Therefore the stria road 3 of each grade all constitutes the hexagon that is interconnected, and makes whole condensing zone 7 form the network-like channel structure that is interconnected and is formed by a plurality of hexagons.
Referring to Fig. 1 and Fig. 2; Between above-mentioned adjacent two condensing zones 7, be provided with by the outward extending straight channel 2 in center; The width of this straight channel 2 is greater than the width in each stria road 3 in the condensing zone 7, and the both sides of this straight channel 2 are provided with interface channel 4 strias at different levels road 3 in said adjacent two condensing zones 7 is connected on the straight channel 2; The width of said interface channel 4 is less than the width of straight channel 2.
Referring to 1 and Fig. 2, the periphery of above-mentioned 12 condensing zones 7 (being the edge of circular soaking wooden partition shell 8) is provided with circular passage 5, and the stria road 3 of the afterbody of each condensing zone 7 is communicated with this circular passage 5.Said many origin or beginning conduits 9 intersect formation one columniform groove 6 at soaking wooden partition shell 8 centers.
Referring to Fig. 2 and Fig. 3, the size of above-mentioned various conduits is following: the width of origin or beginning conduit 9 is 0.8mm; The width of straight channel 2 is 1.2mm; The width of interface channel 4 equals the width in previous stage stria road 3; The width in the stria road 3 of the first order is 0.8mm, and length is 2mm, highly is 0.5mm; Begin from the first order; The width in the stria road 3 of back one-level is 0.74 with the ratio of the width in previous stage stria road 3; The length in the stria road 3 of back one-level is 0.74 with the ratio of the length in previous stage stria road 3, and the height in the stria road 3 of back one-level is identical with the height in previous stage stria road 3.
Above-mentioned network-like channel structure utilizes the method for chemical corrosion to process.
Referring to Fig. 6; Use the soaking plate that above-mentioned liquid sucting core structure processes and comprise evaporation part and condensation part; Wherein, the condensation part is processed by described liquid sucting core structure, is provided with heat exchanger core 10 in the evaporation part; The part that is surrounded by network-like channel structure in the said liquid sucting core structure forms support column 1, and this support column 1 is supported on the heat exchanger core of evaporation part 10; Above-mentioned heat exchanger core 10 is formed by powder sintered.
Referring to Fig. 5; During work; Gaseous working medium is condensed into liquid refrigerant after rising to the condensation part of being processed by liquid sucting core structure of the present invention by the evaporation part, and these liquid refrigerant parts directly (comprise stria road 3, straight channel 2 and interface channel 4 etc.) and vertically be back to evaporation part (among the figure shown in the big arrow) from conduit; Another part radially outwards flows in conduit in (among the figure shown in the small arrow), and is back to the evaporation part again after being pooled to circular passage 5.
Referring to Fig. 7, in the present embodiment, each condensing zone 7 outwards is divided into multistage channel structure by the center, is separated by concentric circular arc passage 11 between at different levels, and the first order is made up of the two stria roads 3 that origin or beginning conduit 9 bifurcateds form, and angle of forking θ is 60 °; Two stria roads 3 of the first order stretch out and and the first order and the second level between circular arc passage 11 intersect, each intersection point place is branched into two stria roads 3, constitutes the second level, angle of forking β is 50 °; Partial stria road 3 stretch out and and the second level and the third level between circular arc passage 11 intersect, each intersection point place is branched into two stria roads 3, constitutes the third level, angle of forking γ is 40 °; The stria road 3 of the third level stretch out and and the third level and the fourth stage between circular arc passage 11 intersect, each intersection point place is branched into two stria roads 3, constitutes the fourth stage, angle of forking α is 30 °; And the like; The stria road 3 of upper level extend out to and this level and next stage between circular arc conduit 11 intersect; Each intersection point is branched into two stria roads 3 and forms the next stage channel structure, and the angle of forking of back one-level is littler 10 ° than the angle of forking angle of previous stage.Above-mentioned stria road 3 at different levels and circular arc passage 11 are interconnected and form network-like channel structure.
In the present embodiment, the width in the stria road 3 of back one-level is 0.6 with the ratio of the width in previous stage stria road 3, and the length in the stria road 3 of back one-level is 0.6 with the ratio of the length in previous stage stria road 3.
Other execution modes beyond present embodiment is above-mentioned are identical with embodiment 1.
Referring to Fig. 8; The network-like channel structure of present embodiment and the difference of embodiment 1 are; In the present embodiment; Four stria roads 3 with the adjacent two stria roads 3 of one-level are told are non-intersect, and two the stria roads 3 in the middle of being positioned at are communicated with through horizontal channel 12, and above-mentioned stria road 3 at different levels and horizontal channel 12 are interconnected and form network-like channel structure.
The angle of forking θ in present embodiment strias at different levels road 3 is 45 °, and the width in the stria road 3 of back one-level is 0.8 with the ratio of the width in previous stage stria road 3, and the length in the stria road 3 of back one-level is 0.8 with the ratio of the length in previous stage stria road 3.
Other execution modes beyond present embodiment is above-mentioned are identical with embodiment 1.
Above-mentioned is preferred implementation of the present invention; But execution mode of the present invention does not receive the restriction of foregoing; For example the ratio of the width in the width in the stria road 3 of previous stage and one-level stria road, back 3 can selected between 1 greater than 0, and the ratio of the length in the length in the stria road 3 of previous stage and one-level stria road, back 3 can selected between 1 greater than 0; The angle of forking in stria road 3 is between 0 °～120 °, to select, and the angle of forking between the strias at different levels road 3 can be identical, also can be different; The structure of condensing zone also can be other forms, increases step by step and constitutes the network structure that is interconnected as long as can form stria road 3 quantity.In a word, other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify, and all should be the substitute mode of equivalence, is included within protection scope of the present invention.
Claims (10)
1. the liquid sucting core structure of a soaking plate; It is characterized in that; Comprise a plurality of by the center to extraradial condensing zone; Each condensing zone is made up of the multistage channel structure that the outside bifurcated step by step of the origin or beginning conduit that is positioned at the center forms, and each level comprises at least two stria roads, and the quantity in middle stria roads at different levels is outwards increased by the center step by step; Being interconnected between the stria road in each grade and between the stria road at different levels makes each condensing zone form network-like channel structure;
The width in the stria road of said back one-level is less than the width in the stria road of previous stage, and the length in the stria road of back one-level is smaller or equal to the length in the stria road of previous stage.
2. the liquid sucting core structure of soaking plate according to claim 1 is characterized in that, is provided with by the outward extending straight channel in center between said adjacent two condensing zones, and the width of this straight channel is greater than the width in each bar stria road in the condensing zone; The both sides of said straight channel are provided with interface channel strias at different levels road in said adjacent two condensing zones are connected on the straight channel, and the width of said interface channel is less than the width of straight channel.
3. the liquid sucting core structure of soaking plate according to claim 2; It is characterized in that; The width in the stria road of back one-level is 0.6～0.8 with the ratio of the width in previous stage stria road, and the length in the stria road of back one-level is 0.6～0.8 with the ratio of the length in previous stage stria road.
4. the liquid sucting core structure of soaking plate according to claim 2 is characterized in that, the angle of forking of said conduit is 0 °～120 °.
5. the liquid sucting core structure of soaking plate according to claim 1 is characterized in that, from described origin or beginning conduit, each stria road homogeneous of each grade is divided into two, and the stria road behind the bifurcated is bent into parastate and stretches out; In four stria roads telling with the adjacent two stria roads of one-level, be merged into one after in the middle of being positioned at two are intersected, make the quantity in stria road of back one-level Duo one than the quantity in the stria road of previous stage; Adjacent stria roads at different levels are connected to end and form polygonal network shape channel structure.
6. the liquid sucting core structure of soaking plate according to claim 1 is characterized in that, is separated by concentric circular arc passage between the channel structure at different levels; From described origin or beginning conduit, each stria road homogeneous of each grade is divided into two, the stria road of upper level extend out to and this level and next stage between the circular arc conduit intersect, each intersection point is branched into two stria roads and forms the next stage channel structure; Said stria road at different levels and circular arc passage are interconnected and form network-like channel structure.
7. the liquid sucting core structure of soaking plate according to claim 1 is characterized in that, from described origin or beginning conduit, each stria road homogeneous of each grade is divided into two, and the stria road behind the bifurcated is bent into parastate and stretches out; In four stria roads telling with the adjacent two stria roads of one-level, two in the middle of being positioned at link together through the horizontal channel; Said stria road at different levels and horizontal channel are interconnected and form network-like channel structure.
8. the liquid sucting core structure of soaking plate according to claim 1 is characterized in that, the periphery of said a plurality of condensing zones is provided with the circular passage, and the stria road of the afterbody of each condensing zone is communicated with this circular passage.
9. the liquid sucting core structure of soaking plate according to claim 1 is characterized in that, described network-like channel structure is processed through on copper coin or aluminium sheet, utilizing the method for chemical corrosion.
10. an application rights requires the soaking plate that the liquid sucting core structure of 1～9 each described soaking plate is processed; It is characterized in that, comprise evaporation part and condensation part, wherein; The condensation part is processed by described liquid sucting core structure; Be provided with heat exchanger core in the evaporation part, the part that is surrounded by the network-like channel structure in limit in the said liquid sucting core structure forms support column, and this support column is supported on the heat exchanger core of evaporation part.
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| CN201210271598.9A CN102811590B (en) | 2012-07-31 | 2012-07-31 | Wick structure for vapor chamber |
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| CN201210271598.9A CN102811590B (en) | 2012-07-31 | 2012-07-31 | Wick structure for vapor chamber |
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