CN104900794A - LED lamp heat radiation structure - Google Patents
LED lamp heat radiation structure Download PDFInfo
- Publication number
- CN104900794A CN104900794A CN201510342720.0A CN201510342720A CN104900794A CN 104900794 A CN104900794 A CN 104900794A CN 201510342720 A CN201510342720 A CN 201510342720A CN 104900794 A CN104900794 A CN 104900794A
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- China
- Prior art keywords
- heat
- radiating shell
- parts
- fin
- blind hole
- Prior art date
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- Granted
Links
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/64—Heat extraction or cooling elements
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Led Device Packages (AREA)
Abstract
An LED lamp heat radiation structure includes a heat radiation shell, a cover body and cooling fins. The heat radiation shell includes a first surface and a second surface arranged opposite to the first surface, and is provided with a through hole and a plurality of blind holes which surround the periphery of the through hole, a first end of the through hole is located in a middle position of the first surface of the heat radiation shell, a second end is located on the second surface of the heat radiation shell, and heat radiation liquid is filled in the blind holes; the cover body is fixedly connected to the heat radiation shell, and the cover body and the blind holes form a closed region; and the cooling fins are radially and uniformly arranged in the periphery of the heat radiation shell. The abovementioned LED lamp heat radiation structure is provided with the plurality of blind holes on an annular circumferential wall, the heat radiation liquid is filled in the blind holes, heat generated by an LED lamp is uniformly absorbed by the heat radiation liquid, and a circumstance that a large amount of heat cannot be radiated in a short time due to small heat capacity, thereby causing damage to the LED lamp, is avoided.
Description
Technical field
The present invention relates to technical field of heat dissipation, especially particularly relate to a kind of LED radiator structure.
Background technology
Along with high-tech flourish, electronic product is increasingly intelligent and complicated, and the volume of electronic component is tending towards microminiaturization, and the closeness in unit are is also more and more high.And the direct impact that this situation is brought is that the heat that electronic product produces in running is increasing.If there is no the heat that good radiating mode produces to get rid of electron institute, these too high temperature will cause electronic component produce electronics free with thermal stress etc. phenomenon, cause overall stability to reduce, and the life-span of shortening electronic component itself.Therefore, how to get rid of these heats to avoid the overheated of electronic component, always be the problem that can not be ignored.
Such as Chinese patent CN201420745979.0, a kind of chip cooling sheet, comprises heat-conducting substrate, the both sides of described heat-conducting substrate are stretched to establish and are arranged fin more, and described fin is upwards after vertical bending, and after connecting an arc fold bending, to downward-extension, form one fall " U " shape dispel the heat curved; One end bottom heat radiation sheet of described heat-conducting substrate after end direction extension, and stretches upwards, and is formed with the installation card base of snap fit.Described heat-conducting substrate, fin or installation card base form by aluminum alloy material integrated punching is shaping.The utility model adopts two row's fin, and fin bends to down " U ", and shape dispels the heat curved, adds product surface and amasss, and saves the space that product takies, and more convenient air flowing, ensures to have good radiating effect like this.
And for example, Chinese patent CN201310242060.X, a kind of LED chip U-tube heat dissipation, energy conservation lamp, comprise: U-shaped luminous radiating subassembly, main body radiator power supply lamp adapter assembly and power supply, wherein U-shaped luminous radiating subassembly comprises: U-shaped diffusion shell, lamp plate and U-shaped heat pipe, and U-shaped diffusion shell is formed bonding with U-shaped heat pipe, lamp plate and power solder, U-shaped heat pipe is connected with main body radiator power supply lamp adapter assembly.Also disclose its manufacture method, it is characterized in that, comprise the following steps: lock, weld, light test, gummed.The present invention achieves the effect and better heat dispersion that are greater than 180 degree of bright dippings by integration optics and special U-shaped heat dissipation design.
And for example, Chinese patent CN201110291860.1 discloses a kind of chip-packaging structure of excellent radiation performance, this chip-packaging structure mainly comprises substrate, chip, pin body, adhesive body and heat abstractor, described chip is arranged on surface, and be in adhesive body inside completely, produced by wire and pin body one end and be electrical connected, the other end of described pin body stretches out adhesive body, be connected with external circuit board, described heat abstractor is arranged on above chip, one end contacts with chip upper surface, and the other end stretches out outside adhesive body and dispels the heat.Present invention is disclosed a kind of chip-packaging structure of excellent radiation performance, the heat that chip in adhesive body can discharge by the built-in heat abstractor of this chip-packaging structure effectively conducts and distributes, and ensure that the Effec-tive Function of chip.
But dissipation from electronic devices of the prior art has still been come by the heat transfer between heat carrier and fin substantially, and radiating effect is not very desirable, so provide a kind of new heat abstractor to be required.
Summary of the invention
Based on this, be necessary for the problems referred to above, the heat abstractor that a kind of good heat dispersion performance, radiating efficiency are higher is provided.
A kind of LED radiator structure, it comprises: radiating shell, it second surface comprising first surface and be oppositely arranged with first surface, described radiating shell arranges through hole and the multiple blind holes around described bore periphery, the first end of described through hole is positioned at the centre position of the first surface of described radiating shell, second end is positioned at the second surface of described radiating shell, is filled with radiator liquid in described blind hole; Lid, it is fixedly connected on described radiating shell, and forms closed area with described blind hole;
Fin, described fin is with the radial periphery being arranged at described radiating shell equably.
Wherein in an embodiment, multiple described blind hole is uniformly distributed along described through hole.
Wherein in an embodiment, described blind hole is circular.
Wherein in an embodiment, the degree of depth of each described blind hole is identical.
Wherein in an embodiment, the radius of each described blind hole is all identical.
Wherein in an embodiment, the circle center line connecting of multiple described blind hole forms circle.
Wherein in an embodiment, between each described blind hole, be mutually formed through circular passage.
Wherein in an embodiment, the described first surface of described radiating shell is recessed to form groove, and described lid is placed in described groove.
Wherein in an embodiment, described lid is fixedly installed on described radiating shell by screwing togather.
Wherein in an embodiment, between described lid and described radiating shell, be also provided with sealant layer.
Above-mentioned LED radiator structure, by arranging multiple blind hole on radiating shell, be filled with radiator liquid in blind hole, being absorbed by radiator liquid of even heat that LED produces, avoid because reason that thermal capacitance is little causes amount of heat to shed at short notice and damage is caused to LED.And utilize the mobility of liquid, heat Quick uniform can be made to be dispersed on radiating shell, and to scatter and disappear in air by fin, because radiating shell is provided with through hole, form gas channel in radiating shell inside, heat is scattered and disappeared fast in outside air, achieves gas-liquid double-radiation function, radiating effect is better, avoid LED for a long time by the impact of high temperature, ensure that LED normally works, reduce light decay, extend LED working life, thus improve the useful life of LED.
Accompanying drawing explanation
Fig. 1 is the detonation configuration schematic diagram of LED radiator structure in one embodiment of the invention;
Fig. 2 is the blast sectional structure schematic diagram of LED radiator structure in another embodiment of the present invention;
Fig. 3 is the partial structurtes schematic diagram of LED radiator structure in another embodiment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar improvement when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
The invention provides a kind of LED radiator structure, it comprises: radiating shell, lid and fin radiating shell, it second surface comprising first surface and be oppositely arranged with first surface, described radiating shell arranges through hole and the multiple blind holes around described bore periphery, the first end of described through hole is positioned at the centre position of the first surface of described radiating shell, and the second end is positioned at the second surface of described radiating shell, is filled with radiator liquid in described blind hole; Described lid is fixedly connected on described radiating shell, and forms closed area with described blind hole; Described fin is with the radial periphery being arranged at described radiating shell equably.
Refer to Fig. 1, LED radiator structure 100, comprise: radiating shell 110, lid 120 and fin 130, the second surface 112 that radiating shell 110 comprises first surface 111 and is oppositely arranged with first surface 111, the centre position of the first surface 111 of radiating shell 110 offers through hole 113 and the multiple blind holes 114 around through hole 113 periphery, the first end of through hole 113 is positioned at the centre position of the first surface 111 of described radiating shell 110, second end is positioned at the second surface 112 of radiating shell 110, is filled with radiator liquid in blind hole 114.Lid 120 is fixedly connected on radiating shell 110, and forms closed area with blind hole 112, and fin 130 is with the radial periphery being arranged at radiating shell 110 equably.Above-mentioned LED radiator structure, by arranging multiple blind hole on radiating shell, be filled with radiator liquid in blind hole, being absorbed by radiator liquid of even heat that LED produces, avoid because reason that thermal capacitance is little causes amount of heat to shed at short notice and damage is caused to LED.And utilize the mobility of liquid, heat Quick uniform can be made to be dispersed on radiating shell, and to scatter and disappear in air by fin, because radiating shell is provided with through hole, form gas channel in radiating shell inside, heat is scattered and disappeared fast in outside air, achieves gas-liquid double-radiation function, radiating effect is better, avoid LED for a long time by the impact of high temperature, ensure that LED normally works, reduce light decay, extend LED working life, thus improve the useful life of LED.
In order to realize being uniformly distributed of heat, such as, multiple described blind hole is uniformly distributed along described through hole, and and for example, shape and the size of multiple described blind hole are all identical, like this, contribute to realizing being uniformly distributed of heat.And for example, arrange and organize blind hole more, shape and the size of often organizing each blind hole in blind hole are all identical, each blind hole shape of different group and size different.Preferably, away from the blind hole of described through hole, its volume is greater than the blind hole near described through hole.Like this, can obtain evenly radiating effect.
In order to increase the contact area of radiator liquid and radiating shell in blind hole, to improve radiating efficiency, such as, described blind hole is column structure, due to when equal volume, cylindrical surface area is comparatively large, like this, the contact area of radiator liquid and radiating shell can be increased, improve the radiating efficiency of heat abstractor.
Further, for the ease of the production process of radiating shell, and being uniformly distributed of heat, such as, the radius of each described blind hole is identical, and for example, the degree of depth of each described blind hole is identical, and for example, the circle center line connecting of described blind hole forms circle, like this, what can facilitate radiating shell manufactures process, also contributes to realizing being uniformly distributed of heat simultaneously.
In the present embodiment, described radiator liquid is 50% ~ 100% of described blind hole volume, and described radiator liquid is boiling point>=70 DEG C, thermal capacitance>=3 × 10 at normal atmospheric pressure
3j/ (kg DEG C).Preferably, described radiator liquid is at least one in distilled water, ammoniacal liquor, methyl alcohol, ethanol, hexanol, acetone, heptane or conduction oil, and such as, described radiator liquid is the mixture of distilled water and ethanol.And for example, described radiator liquid comprises each component of following mass parts: distilled water: 75 parts ~ 78 parts, ethanol: 22 parts ~ 25 parts, sodium chloride: 0.5 part ~ 1 part, sodium nitrate: 0.5 part ~ 1.5 parts, sodium perborate: 0.5 part ~ 1.5 parts, BTA: 0.2 part ~ 0.5 part, when the temperature of radiator liquid is more than 30 DEG C, be diluted in the ethanol generating gasification in distilled water and distilled water is gasified gradually, the inwall that the ethanol of gasification and distilled water carry out evaporating cold coalescence and containing cavity repeatedly in the blind hole of sealing carries out heat exchange, and sodium chloride add the boiling point that can reduce ethanol and distilled water, therefore the evaporation of distilled water and ethanol and the cycle period of condensation can be accelerated, and can prevent when temperature is lower, distilled water solidifies, sodium nitrate and the composite of BTA can be used as corrosion inhibitor or corrosion inhibiter, it can form uniform passivation layer and organic film on the surface of the inwall of blind hole, stop the further generation of corrosion reaction, in addition, sodium perborate add the effect can playing freeze proof inhibitor and scale removal.
Preferably, described radiator liquid also comprises the conductive particles that mass parts is 5 parts ~ 25 parts.Further, conductive particles comprises nano level metal powder and nano-carbon material particle.Further, conductive particles is copper nanoparticle, Nano carbon balls or carbon nano-tube etc.By adding conductive particles, the radiating efficiency of LED heat dissipation structure can be improved further.
Further, in order to avoid radiator liquid being repeatedly heated, in evaporative condenser process with the inwall generation chemical reaction of blind hole in radiating shell, such as, the material of described radiating shell and radiator liquid adaptive, that is, there is not chemical reaction in the material of radiating shell and radiator liquid.And for example, described radiating shell is made up of aluminium alloy, and described aluminium alloy comprises each component composition of following mass parts: aluminium: 80.2 parts ~ 89.5 parts; Magnesium: 10.3 parts ~ 15.1 parts; Silicon: 0.5 part ~ 1.5 parts; Copper: 1.2 parts ~ 3.5 parts; Manganese: 0.2 part ~ 1.0 parts; Nickel: 2.3 parts ~ 4.6 parts; Molybdenum: 0.1 part ~ 0.5 part; Zirconium: 0.2 part ~ 0.5 part; Above-mentioned aluminium alloy is made primarily of aluminium, magnesium, not only can make the lighter weight of the base material of preparation, thermal conductivity is better, and silicon, copper, manganese, nickel, adding of molybdenum can make the inwall of blind hole have larger intensity, in addition, zirconium add the fatigue-resistance characteristics and decay resistance that can improve containing cavity inwall, but when the content of zirconium is greater than 0.5 part, its decay resistance can't improve less, and can affect surrender degree and other mechanical mechanics properties of material.
Further, the inwall of the described blind hole of described radiating shell is provided with protective layer, and and for example, described protective layer comprises the material with carbon elements such as graphite, nano carbon material, diamond like carbon, and chemical physical property temperature, thermal conductivity is good.And for example; described protective layer is diamond like carbon (DLC) coating be located on described blind hole inwall; and for example, described diamond-like coating and described blind hole inwall have also been provided with the chrome coating of solid attached effect, have stronger adhesion to make the inwall of diamond-like coating and blind hole.Preferably, the thickness of described diamond-like coating is 1.0 ~ 2.0 microns, and the thickness of chrome coating is 10 ~ 40 nanometers.And for example, the composition of described diamond-like coating comprises the graphite-phase of 20% ~ 60% and the diamond phase of 80% ~ 40%.
Further, described radiating shell is made up of heat conduction polyamide compoiste material, each component that described heat conduction polyamide compoiste material comprises following weight portion is made: polyamide: 20.6 parts ~ 45.2 parts, heat filling: 60.2 parts ~ 75.8 parts, antioxidant: 0.2 part ~ 0.3 part, coupling agent: 0.5 part ~ 0.7 part, auxiliary agent: 0.8 part ~ 1.2 parts, lubricant: 0.2 part ~ 0.4 part, levelling agent: 0.3 part ~ 0.6 part.And for example, described heat filling is at least one in carborundum, aluminium oxide, graphite, boron nitride or aluminium nitride.And for example, described coupling agent is titante coupling agent or silane coupling agent.And for example, described titanium ester class coupling agent is isopropyl three stearic acid titanate esters, and described silane coupling agent is γ-glycidyl ether oxygen propyl trimethoxy silicane.And for example, described antioxidant is the compound of Hinered phenols primary antioxidant and phosphorous acid esters auxiliary antioxidant, and the weight ratio of Hinered phenols primary antioxidant and phosphorous acid esters auxiliary antioxidant is 1:1 ~ 2.And for example; described Hinered phenols primary antioxidant is antioxidant N; N '-bis--(3-(3; 5-di-tert-butyl-hydroxy phenyl) propiono) hexamethylene diamine; described phosphorous acid esters auxiliary antioxidant is antioxidant three [2,4-di-tert-butyl-phenyl] phosphite ester or antioxidant 4,4 '-[1; 1 '-xenyl] subunit di 2 ethylhexyl phosphonic acid-four [2,4-bis-2-methyl-2-phenylpropane base] ester.And for example, described lubricant is silicone or N, N '-ethylene bis stearamide.And for example, described levelling agent is silicone based levelling agent.Above-mentioned radiating shell, owing to adopting polyamide resin material and heat filling to be raw material, make that its thermal conductivity is good, mechanical strength is higher, compared with the radiating shell made with traditional aluminum alloy materials, it has, and density be lower, weight is less, corrosion-resistant, easy processing, lower-cost advantage.
Further, in order to ensure the mechanical performance of LED radiator structure, such as, the wall thickness of described radiating shell is 5 ~ 30 millimeters, and for example, the wall thickness of described radiating shell is 10 ~ 20 millimeters, like this, can ensure that LED radiator structure has good mechanical performance, avoid the transmission of the larger obstruction heat of radiating shell thickness simultaneously.
Further, in order to provide radiating effect, such as, each described blind hole is formed through circular passage mutually, particularly, refer to Fig. 2, the first surface 111 of radiating shell 110 forms cannelure 115, when radiator liquid reaches gasification temperature, the steam of radiator liquid will be full of rapidly whole cannelure, make radiating shell realize temperature everywhere to be substantially uniformly distributed, realize rapid dispersion and the transmission of heat, improve radiating efficiency further.
Contact due to radiator liquid and radiating shell is only the sidewall of cannelure, namely, the contact area of radiator liquid and radiator is the area of this cylindrical inner surface, in order to strengthen the radiating effect of LED radiator structure further, such as, the sidewall of described cannelure is also provided with some auxiliary heat conduction posts, and for example, described in each, the cross section of auxiliary heat conduction post is arc, and for example, described in several, auxiliary heat conduction post is uniformly distributed in the sidewall of described cannelure, and for example, some described auxiliary heat conduction post continuous distribution, by arranging auxiliary heat conduction body, the contact area of radiator liquid and radiating shell can be increased, thus raising heat transference efficiency, improve radiating effect.
Particularly, refer to Fig. 3, the sidewall of cannelure 115 is provided with some auxiliary heat conduction posts 116, the cross section of each auxiliary heat conduction post 116 is cylinder, size and the shape of each auxiliary heat conduction post 116 are identical, are evenly arranged in the inwall of cannelure 115, and auxiliary heat conduction post 116 continuous arrangement.Like this, the contact area of radiator liquid and radiating shell can be increased further, improve radiating efficiency, simultaneously also can avoid taking space larger in cannelure and the volume that reduces radiator liquid.Certainly, auxiliary heat dissipation post is not limited to above-mentioned shape, and such as, the cross section of described auxiliary heat conduction post is triangle, and and for example, the cross section of described auxiliary heat conduction post is trapezoidal, and and for example, the cross sectional shape of described auxiliary heat conduction post is rectangle.
Process is manufactured for the ease of LED radiator structure, such as, described auxiliary heat conduction post and described radiating shell are formed in one structure, and for example, described auxiliary heat conduction post and described radiator form integrated formed structure by casting process, like this, what can facilitate LED radiator structure manufactures process.
In order to increase convective heat transfer area further, to improve the efficiency of convective heat transfer, improve radiating efficiency, such as, described through hole is manhole.And for example, the area of described through hole accounts for 40% ~ 80% of the described first surface area of described radiating shell, preferably, the circular area of described through hole accounts for 50% ~ 60% of the described first surface area of described radiating shell, both LED radiator structure can have been made to have stronger mechanical stability, can also area of dissipation be improved simultaneously, increase convective heat transfer efficiency, thus improve heat dispersion.
Further, the hole wall of described through hole is provided with radiating fin.Such as, described radiating fin extends along the hole wall radial direction of described through hole.And for example, described radiating fin is laminated structure.And for example, the width of described radiating fin is less than the radius of described through hole.And for example, the width of described radiating fin is less than 2/3 of described through hole radius.Radiating fin is set in the inside of LED radiator structure, adds the area of dissipation in through hole in LED radiator structure, improve the radiating effect of conductive heat transfer.
And for example, radiating fin is identical with the material of radiating shell, and and for example, radiating fin and radiating shell are formed in one structure.And for example, radiating fin and radiating shell obtain through aluminium extruded processing technology, and preparation method is simple, and are conducive to the intensity increasing fin.
And for example, radiating fin comprises each component of following mass parts: aluminium: 92.1 parts ~ 94.5 parts, silicon: 0.2 part ~ 1.5 parts, copper: 0.05 part ~ 1.2 parts, manganese: 0.3 part ~ 1.8 parts, titanium: 0.03 part ~ 0.3 part, iron: 0 ~ 1.0 part, chromium: 0.03 part ~ 0.3 part, zinc: 0.2 part ~ 1.0 parts, zirconium: 0.03 part ~ 0.3 part.Above-mentioned radiating fin is mainly made of aluminum, not only can make radiating fin lighter weight, heat conductivility is better, and silicon, copper, manganese, titanium, adding of iron can make radiating fin have larger intensity, in addition, chromium, zinc, zirconium add the fatigue-resistance characteristics that can improve radiating fin, make radiating fin have good mechanical property.
Refer to Fig. 2, the first surface 111 of radiating shell 110 is recessed to form groove 117, and lid 120 is placed in described groove 117.
Further, for the ease of the assembling of lid and radiating shell, such as, described lid is fixedly installed on described radiating shell by screwing togather, and for example, the inwall of described lid is provided with internal thread, and the correspondence position of described radiating shell is provided with external screw thread, and described internal thread and described external screw thread are connected, and for example, be tightly connected by clamping between described lid and described radiating shell, like this, the assembling of lid and radiating shell can be facilitated.
In order to solve the sealing problem between lid and radiating shell better, prevent radiator liquid from leaking, such as, the interface of described lid and described radiating shell is provided with sealant layer.By arranging sealant layer, the sealing between lid and radiating shell can be improved, preventing radiator liquid from leaking.
Such as, lid in an embodiment of the present invention, it comprises each component of following mass parts: aluminium: 62.4 parts ~ 90.1 parts, yttrium: 11.3 parts ~ 14.8 parts, scandium: 2.7 parts ~ 13.5 parts, titanium: 0.5 part ~ 1.2 parts, molybdenum: 0.5 part ~ 1.5 parts, vanadium: 0.3 part ~ 1.0 parts, strontium: 0.1 part ~ 1.2 parts, beryllium: 0.6 part ~ 2.1 parts, above-mentioned lid is mainly made of aluminum, not only can make the lighter weight of lid, heat conductivility is better, and, yttrium, scandium, titanium, molybdenum, vanadium, strontium, berylliums etc. belong to transition metal, high temperature resistant and thermal resistance is little, thermal radiation capability is high, the heat absorbed can distribute rapidly in radiation.
Preferably, the thickness of described lid is 3 ~ 8 millimeters, further, the thickness of described lid is 2 ~ 6 millimeters, like this, the heat that LED produces can be passed to radiating shell by lid fast, and scatters and disappears in outside air by gas-liquid two kinds of heat dissipation channels of radiating shell, good mechanical strength can also be kept simultaneously, avoid external force collision to cause the distortion of lid.
In the present embodiment, described lid is annular, namely, described lid is hollow-core construction in the described through hole corresponding position of described radiating shell, like this, not only can alleviate the quality of lid, reduce production cost, meanwhile, radiating shell through hole gas velocity of liquid assets can be accelerated, thus increase the convective heat transfer efficiency of gas.
In order to improve the delivered heat ability of lid further, such as, described lid is provided with some heat pipes, described heat pipe is inserted in described radiator liquid, by arranging heat pipe, and can by the heat fast transport on lid in radiator liquid, and then absorbed by radiator liquid, like this, the transmission speed of heat on lid can be accelerated, improve radiating efficiency.
Further, described lid and described heat pipe are formed in one structure, and processing technology is simple, and cost is lower.
In order to increase the contact area of heat pipe and radiator liquid further, to improve heat conduction efficiency, such as, described heat pipe is helicoidal structure, and and for example, described heat pipe is wavy shaped configuration, like this, the contact area of heat pipe and liquid can be increased, thus increase heat conduction efficiency.
Be appreciated that, because heat pipe is inserted in radiator liquid, therefore heat pipe needs to have good resistance to corrosion.Such as, heat pipe in an embodiment of the present invention, it comprises each component of following mass parts: aluminium: 93.4 parts ~ 95.8 parts, silicon: 0.05 part ~ 0.15 part, manganese: 0.2 part ~ 0.5 part, magnesium: 1.0 parts ~ 3.0 parts, nickel: 3.0 parts ~ 6.0 parts, titanium: 0.02 part ~ 0.06 part, zirconium: 0.05 part ~ 0.15 part, scandium: 0.1 part ~ 0.3 part.Owing to adding nickel, nickle atom can reduce the potential difference of crystal boundary and intracrystalline, this improves the stress corrosion resistant ability of heat carrier, meanwhile, also improves the intensity of heat carrier, plasticity and repeats to load drag.Scandium (Sc) forms precipitated phase Al in aluminium alloy
3sc, it has face-centred cubic structure, lattice constant and α (Al) matrix close, stability is high, not only has strong age-hardening effect, and has high thermal stability.Therefore, adding of scandium, alloy structure can be made fined, and provide forming core core for precipitated phase, make the precipitation of precipitated phase expand to α (Al) matrix gradually by crystal boundary, disperse is even more, reduces the difference in Electrode Potential of crystal boundary and intracrystalline, form homogeneous corrosion, thus improve the corrosion resisting property of alloy.Owing to adding zirconium (Zr), and Zr and Al combines formation Al
3zr intermetallic compound, this intermetallic compound has two kinds of Structure and forms: the Al directly separated out from melt
3zr is tetragonal, can the as-cast grain of remarkable refining alloy; Another kind is the spheroidal particle of separating out in ingot homogenization process, has the effect of recrystallization in strong inhibition hot procedure; And strong containing Zr alloy quenching sensitiveness, the quenching degree of alloy improves, therefore, zirconium add the intensity, fracture toughness and the anti-stress corrosion performance that effectively improve alloy.
Above-mentioned heat pipe, because it comprises aluminium, nickel, magnesium, silicon, manganese, titanium, zirconium, scandium, these elements interact, and make it not only have good heat conductivity, the advantage that specific area is large, have feature that is anticorrosive, high strength simultaneously.
In order to improve the resistance to corrosion of heat pipe further, such as, the periphery of described heat pipe is provided with etch resistant layer, and for example, etch resistant layer is identical with the composition of described protective layer, and for example, etch resistant layer comprises each component of following mass parts: acroleic acid resin: 25 parts ~ 30 parts, nitrocotton resin: 25 parts-30 parts, butyl acetate: 6 parts ~ 8 parts, n-butanol: 6 parts ~ 8 parts, ethylene glycol ethyl ether: 3 parts ~ 4 parts, levelling agent: 1 part ~ 1.5 parts, defoamer: 1 part ~ 1.5 parts, inorganic filler 20 parts ~ 30 parts, wherein inorganic filler comprises aluminium nitride, boron nitride, aluminium oxide, carborundum or copper powder, preferably, the particle diameter of inorganic filler is 0.5 ~ 3 micron.Adding of nitrocotton resin, not only make it have fast drying, and it is better to have good hardness and brightness smooth weatherability, adding of inorganic filler, can make it have good heat conductivility.Preferably, the thickness of etch resistant layer is 10 ~ 20 microns, like this, can make it have good resistance to corrosion, can keep higher conductive coefficient again simultaneously.
Such as, fin in an embodiment of the present invention, it comprises each component of following mass parts: Graphene: 20 parts ~ 30 parts, carbon fiber: 20 parts ~ 30 parts, polyamide: 40 parts ~ 60 parts, water-soluble silicate: 10 parts ~ 20 parts, hexagonal boron nitride: 1 part ~ 8 parts, bismaleimides: 2 parts ~ 5 parts, silane coupler: 0.5 part ~ 2 parts, antioxidant: 0.25 part ~ 1 part.And for example, described antioxidant is one or more in two Lauryl Alcohol ester, two ten four carbon alcohols esters or two octadecanol ester.And for example, described water-soluble silicate is lithium metasilicate or sodium metasilicate.
Above-mentioned Graphene, carbon fiber mix with polyamide, under the high temperature conditions by the copolyreaction ordered arrangement to a certain extent of polyamide, form heat dissipation channel, give heat and form microchannel absorption cross-ventilation, produce stronger radiant heat transfer effect, thus the heat dispersion of fin can be improved, and the more fluffy sky of heat radiating fin structure formed, quality is lighter.In addition, owing to the addition of carbon fiber, its surface protection performance and mechanical performance are better, such as, more anti-oxidant, more acid and alkali-resistance and more corrosion-resistant.
Preferably, described fin comprises each component of following mass parts: Graphene: 30 parts ~ 35 parts, carbon fiber: 25 parts ~ 30 parts, polyamide: 45 parts ~ 50 parts, water-soluble silicate: 15 parts ~ 20 parts, hexagonal boron nitride: 4 parts ~ 6 parts, bismaleimides: 3 parts ~ 4 parts, silane coupler: 1 part ~ 1.5 parts, antioxidant: 0.5 part ~ 1 part.
Preferably, described fin comprises each component of following mass parts: Graphene 35 parts, 28 parts, carbon fiber, polyamide 45 parts, water-soluble silicate 18 parts, hexagonal boron nitride 5 parts, bismaleimides 3.5 parts, silane coupler 1.8 parts, antioxidant 0.7 part.
Such as, the particle diameter of Graphene is 10-50 μm, and the particle diameter of carbon fiber is 20-30 μm, and the particle diameter of hexagonal boron nitride is 1-10 μm.
Above-mentioned fin can delay by adding antioxidant or suppress the carrying out of polymer oxidizing process, thus stop the aging of Polyamide Engineering Plastic and extend its useful life, by adding silane coupler and two succinimide, the compatibility of other components and polyamide can be improved, make it have good mechanical property and mobility, polyamide is made to enter to obtain good surface quality and machinery, heat and electrical property, the conductive coefficient of fin can be improved by adding hexagonal boron nitride, making fin have higher heat loss through radiation ability.
Above-mentioned fin, by adding graphene film and carbon fiber in polyamide, graphene film and carbon fiber is utilized to have density little, thermal conductivity and fine heat radiation property, and polyamide material has that cost is low, quality is little and the advantage such as machine-shaping property is good, compared with traditional aluminum alloy heat sink, its quality can reduce greatly, cost is low, machine-shaping is easy, and simultaneously it also has the performances such as perfect heat-dissipating, toughness are larger, high temperature resistant and corrosion-resistant.
In the present embodiment, fin is with the radial periphery being arranged at described radiating shell equably, that is, the interval between fin is equal.During due to the heat radiation spacing between abutting fins larger, the quantity of fin can be caused inadequate, affect radiating effect, and spacing between abutting fins less time, on the one hand, the use of material can be increased, increase cost of manufacture, and increase the weight of whole radiator, on the other hand, less spacing makes formation too little for the passage of air flowing, heat is easily caused to be hoarded, radiating effect is undesirable, in order to solve the technical problem how better reaching radiating effect, such as, spacing between adjacent described fin is 2 ~ 10 millimeters, and for example, spacing between adjacent described fin is 4 ~ 8 millimeters, and for example, spacing between adjacent described fin is 5 ~ 6 millimeters, and for example, the thickness of described fin is 5 ~ 20 millimeters, and for example, the thickness of described fin is 10 ~ 15 millimeters, like this, radiator can be made to reach preferably heat dispersion.Preferably, the width of fin is by the reduction gradually of top to bottom, and and for example, the formation of described fin is inverted trapezoidal, like this, can accelerate the radiating rate of fin further.
Further, the both side surface of described fin is equipped with corrugated radiation tooth, and for example, described radiation tooth extends along the Width of described fin, and for example, the thickness of radiation tooth is less than the thickness of described fin, by arranging radiation tooth, can area of dissipation be increased, thus improve radiating efficiency.
And for example, described fin is interval with multiple fin and fenestra, concrete, described fenestra is that open-type indentation is carved at interval on a heat sink, retains and does not make indentation, formed by punching press on described fin; Described fin is that the material retained in described fenestra on described fin is formed; Shape acute angle or right angle between described fin and described fin in the vertical direction.By offering fenestra on the surface in heat radiation blade, and retaining the area of fenestra, fin surface forms fin, in vertical direction and have certain angle between fin, fin extends to air-flow direction and increases area of dissipation fin; The existence of fin strengthen air in the vertical direction, the disorderly degree of horizontal and vertical flowing, destroy the laminar sublayer of lamina air flow flowing, decrease heat transfer resistance, improve heat exchange coefficient, obtain better heat transfer effect.
In order to increase the contact area of radiating shell and fin further, to improve the radiating efficiency of LED radiator structure, such as, described fin is arcuate structure, that is, the contact-making surface of described fin and described radiator is arc, and for example, described fin is S type structure, that is, the contact-making surface of described fin and described radiator is S type, like this, the contact area of fin and radiating shell can be increased, improve the heat dispersion of LED radiator structure.
Preferably, the periphery of described fin is also provided with heat dissipating housing, and heat dissipating housing is connected with described fin one end away from described radiating shell, that is, one end of described fin is connected with radiating shell, and the other end is connected with described heat dissipating housing.By arranging heat dissipating housing, can fin be protected, preventing fin from fractureing because external force collision deforms, in addition, can prevent dust and other impurities from falling into fin and affecting radiating effect.
Further, heat dissipating housing and fin are formed in one structure, such as, described heat dissipating housing and described fin form integrated formed structure by casting process, and and for example, described heat dissipating housing and described fin form integrated formed structure by aluminium extruded, processing is simple, and production cost is lower.
Above-mentioned LED radiator structure, by arranging multiple blind hole on radiating shell, be filled with radiator liquid in blind hole, being absorbed by radiator liquid of even heat that LED produces, avoid because reason that thermal capacitance is little causes amount of heat to shed at short notice and damage is caused to LED.And utilize the mobility of liquid, heat Quick uniform can be made to be dispersed on radiating shell, and to scatter and disappear in air by fin, because radiating shell is provided with through hole, form gas channel in radiating shell inside, heat is scattered and disappeared fast in outside air, achieves gas-liquid double-radiation function, radiating effect is better, avoid LED for a long time by the impact of high temperature, ensure that LED normally works, reduce light decay, extend LED working life, thus improve the useful life of LED.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a LED radiator structure, is characterized in that, comprising:
Radiating shell, it second surface comprising first surface and be oppositely arranged with first surface, described radiating shell arranges through hole and the multiple blind holes around described bore periphery, the first end of described through hole is positioned at the centre position of the first surface of described radiating shell, second end is positioned at the second surface of described radiating shell, is filled with radiator liquid in described blind hole;
Lid, it is fixedly connected on described radiating shell, and forms closed area with described blind hole;
Fin, described fin is with the radial periphery being arranged at described radiating shell equably.
2. LED radiator structure according to claim 1, is characterized in that, multiple described blind hole is uniformly distributed along described through hole.
3. LED radiator structure according to claim 1, is characterized in that, described blind hole is circular.
4. LED radiator structure according to claim 3, is characterized in that, the degree of depth of each described blind hole is identical.
5. LED radiator structure according to claim 4, is characterized in that, the radius of each described blind hole is all identical.
6. LED radiator structure according to claim 5, is characterized in that, the circle center line connecting of multiple described blind hole forms circle.
7. LED radiator structure according to claim 6, is characterized in that, is mutually formed through circular passage between each described blind hole.
8. LED radiator structure according to claim 1, is characterized in that, the described first surface of described radiating shell is recessed to form groove, and described lid is placed in described groove.
9. LED radiator structure according to claim 8, is characterized in that, described lid is fixedly installed on described radiating shell by screwing togather.
10. LED radiator structure according to claim 1, is characterized in that, is also provided with sealant layer between described lid and described radiating shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510342720.0A CN104900794B (en) | 2015-06-18 | 2015-06-18 | LED light radiator structure |
Applications Claiming Priority (1)
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| CN108150977A (en) * | 2017-12-19 | 2018-06-12 | 苏州亿沃光电科技有限公司 | LED component soaking plate, preparation method and LED component based on porous carbon materials |
| CN108922881A (en) * | 2018-06-29 | 2018-11-30 | 江苏绿色照明工程有限公司 | A kind of LED light illuminating module connection structure and its installation method |
| CN110309819A (en) * | 2019-07-30 | 2019-10-08 | 天津艾思科尔科技有限公司 | A kind of crowded estimating system |
| CN112259672A (en) * | 2020-10-22 | 2021-01-22 | 深圳市宇亮光电技术有限公司 | Low-power LED lamp bead low-thermal-resistance packaging structure and packaging process |
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| CN112259672B (en) * | 2020-10-22 | 2021-06-08 | 深圳市宇亮光电技术有限公司 | Low-power LED lamp bead low-thermal-resistance packaging structure and packaging process |
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