CN103939870A - Cooling fin suitable for high-power LED lamp heat radiator - Google Patents

Cooling fin suitable for high-power LED lamp heat radiator Download PDF

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Publication number
CN103939870A
CN103939870A CN201410165834.8A CN201410165834A CN103939870A CN 103939870 A CN103939870 A CN 103939870A CN 201410165834 A CN201410165834 A CN 201410165834A CN 103939870 A CN103939870 A CN 103939870A
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CN
China
Prior art keywords
fin
branch
radiator
trunk
cooling fin
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Pending
Application number
CN201410165834.8A
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Chinese (zh)
Inventor
方亮
闫转芳
阮友亮
孙甲鹏
孙琨
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Xian Jiaotong University
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Xian Jiaotong University
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Application filed by Xian Jiaotong University filed Critical Xian Jiaotong University
Priority to CN201410165834.8A priority Critical patent/CN103939870A/en
Publication of CN103939870A publication Critical patent/CN103939870A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a cooling fin suitable for a high-power LED lamp heat radiator. The cooling fin comprises a plurality of main cooling fin bodies arranged on a heat radiator body, and a plurality of branch cooling fin bodies are evenly arranged on each main cooling fin body. The transverse branch cooling fin bodies and the longitudinal branch cooling fin bodies are adopted by the cooling fin, the transverse branch cooling fin bodies are distributed perpendicular to the two sides of the cooling fin, and the longitudinal branch cooling fin bodies are arranged at the outer end of the cooling fin. On the premise that the size of the heat radiator is not greatly changed, the cooling area of the heat radiator is increased as far as possible, each cooling fin body can achieve the best cooling effect, when the cooling fin is applied to the high-power LED lamp, the temperature of the heat radiator is greatly lowered, and meanwhile the junction temperature of the lamp is lowered.

Description

A kind of fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator
Technical field
The present invention relates to a kind of fin, be specifically related to a kind of fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator.
Background technology
LED lamp is due to its environmental protection at present, and the life-span is long, and energy consumption is low, and volume is little, small voltage, and the advantages such as little electric current, make it obtain development fast and replace gradually other light fixtures, have been widely used in various lighting fields.In recent years, along with improving constantly of LED technology, application constantly general, the continuous appearance of LED light fixture of all kinds, make LED illumination be considered to one of lighting field technology most with prospects, become the throw light on revolution of the another field lighting source continue incandescent lamp, fluorescent lamp after in history of the mankind.
Along with the continuous solution of LED lighting engineering problem and improving constantly of lighting demand, the appearance of high-power LED lamp and need to become inexorable trend.Incident is exactly the heat dissipation problem of high-power LED lamp, this is because the light decay of LED or its life-span are directly relevant with its junction temperature, the more bad light fixture junction temperature of dispelling the heat is just higher, life-span also will shorten accordingly, according to service life of 10 ℃ of light fixtures of the every reduction of A Leiniusi rule temperature extending 2 times.As everyone knows, the long-life of LED light fixture is to attract one of our advantage most, but due to the higher service life that directly affects LED light fixture of junction temperature of high-power LED lamp, add that the price of LED light fixture own is expensive a lot of compared with conventional incandescent, uses it and promote to be greatly restricted.
As mentioned above, can learn that the heat dissipation technology of LED light fixture has directly affected the promotion and application prospect of LED light fixture, because the thermal capacity of LED chip itself is very little, the thermal accumlation of a little all can make the junction temperature of LED chip rise rapidly, if work long hours under higher junction temperature, the shortening that the life-span of LED light fixture will be very fast.The heat that LED chip produces is communicated to radiator by PCB substrate, and the heat-sinking capability of radiator has played vital effect to the heat-sinking capability of whole light fixture, directly has influence on heat-sinking capability and the junction temperature thereof of LED light fixture.
Summary of the invention
The object of the invention is to propose a kind of fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator, this fin can extend the service life of LED light fixture, and processing is simple, and production and operating cost are low.
In order to achieve the above object, the technical solution used in the present invention is: comprise a plurality of trunk fin that are arranged on radiator body; On each trunk fin, be furnished with uniformly a plurality of branches fin.
On each trunk fin, the thickness of branch's fin is less than the thickness of trunk fin.
On each trunk fin, branch's fin is perpendicular to the trunk fin surface at branch's fin place.
On each trunk fin, the thickness ratio of the gap between contiguous branch fin and branch's fin is 2.5-3.0.
On each trunk fin, branch's fin of close radiator body and the gap that the gap between radiator body surface is greater than contiguous branch fin.
On each trunk fin, branch's fin is arranged on the outer end of trunk fin, and a plurality of branches fin has a branch point being positioned on trunk fin.
On each trunk fin, the angle between contiguous branch fin is 15 ℃-25 ℃, and the distance of branch point discrete heat device body is greater than half of trunk fin length.
The gap of contiguous branch fin ends is greater than the thickness of trunk fin, and contiguous branch fin is arranged on adjacent trunk fin.
The present invention carries out the fin of traditional heat-dissipating device reasonably to divide each trunk fin of sending away radiator to become a small-sized radiator.Compared with prior art, beneficial effect of the present invention is:
1, the present invention carries out branch process to traditional heat-dissipating sheet, guaranteeing under the little prerequisite of radiator integral change in volume, the number of fin is increased greatly, improved to a great extent the area of dissipation of radiator, avoided the concentrations of heat, and can effectively utilize the convection heat transfer' heat-transfer by convection effect of air, make heat loss through conduction and heat loss through convection fully in conjunction with having given play to larger heat-sinking capability, the final temperature that has reduced greatly radiator, also reduced the junction temperature of light fixture, extended the service life of LED light fixture simultaneously.
2, heat radiating fin structure profile of the present invention is directly perceived, and technique is simple, and the volume of radiator and mass change are all little, and the miscellaneous part of light fixture all can not made any change, there is general applicability, can be widely used in batch production, thereby can ignore the Cost Problems that profile variation causes.Design method of heat radiator of the present invention, mainly for high-power LED lamp, than the traditional heat-dissipating device of same volume, can be supported higher power, and it is particularly evident to be applicable to the high-power LED lamp effect of power more than 30W.
Further, on same trunk fin, the too small heat-sinking capability that all can have influence on light fixture of excesssive gap of contiguous branch fin, therefore, ratio between gap between contiguous branch and branch's thickness is within the scope of 2.5-3.0, longitudinally the angle between branch select 15 ℃-25 ℃ in time, the integral heat sink effect of light fixture can be better.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention's fin transverse branch while adopting circular radiator;
Fig. 2 is the structural representation of the present invention's fin transverse branch while adopting rectangle radiator;
Fig. 3 is the structural representation of the present invention longitudinal branch of fin while adopting circular radiator;
Fig. 4 is the structural representation of the present invention longitudinal branch of fin while adopting rectangle radiator;
Fig. 5 is the structural representation of the radiator of traditional structure;
Wherein, 1-trunk fin, 2-branch fin.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further details.
The fin that the present invention is applicable to high-power LED (Light-Emitting Diode) lamp radiator is on the fin of traditional heat-dissipating device, to draw a plurality of branches fin.Traditional selection of heat sinks circular radiator or rectangle radiator.
Referring to Fig. 1 and Fig. 3, when adopting circular radiator, the present invention includes and be evenly arranged on a plurality of trunk fin 1 that make progress in radiator body week; On each trunk fin 1, be furnished with uniformly a plurality of branches fin 2, radiator body is cylindrical structure.
Referring to Fig. 2 and Fig. 4, when adopting rectangle radiator, the present invention includes the vertical a plurality of trunk fin 1 on radiator body that are arranged in; On each trunk fin 1, be furnished with uniformly a plurality of branches fin 2, radiator body is platy structure.
Concrete, the fin that the present invention is applicable to high-power LED (Light-Emitting Diode) lamp radiator has provided two kinds of modes of transverse branch and longitudinal branch, and no matter be to adopt transverse branch or longitudinal bifurcation approach, the thickness of each trunk fin 1 top set's fin 2 is all less than the thickness of trunk fin 1.
(1) transverse branch:
Referring to Fig. 1 and Fig. 2, radiator body is tabular or cylinder, and each branch's fin 2 is perpendicular to trunk fin 1 surface at branch's fin 2 places.
On same trunk fin, the too small heat-sinking capability that all can have influence on light fixture of excesssive gap of contiguous branch fin, therefore, gap on each trunk fin 1 of the present invention between contiguous branch fin 2 and the ratio between the thickness of branch's fin 2 are 2.5-3.0, can make like this integral heat sink effect meeting of LED light fixture better.Under having ready conditions, increase as much as possible the area of dissipation of radiator, avoid the concentrations of heat, effectively utilize the convection heat transfer' heat-transfer by convection effect of air, make heat loss through conduction and heat loss through convection fully in conjunction with having given play to larger heat-sinking capability.
As shown in Figure 1, when adopting the radiator body of cylindrical structure, should be noted on each trunk fin 1, branch's fin 2 of close radiator body and the gap that the gap between radiator body outer wall is greater than contiguous branch fin 2; Equally as shown in Figure 2, when adopting the radiator body of platy structure, branch's fin 2 of the most close radiator body (may also be referred to as substrate) and the gap on radiator body surface are greater than the gap between contiguous branch fin 2.
(2) longitudinal branch:
Referring to Fig. 3 and Fig. 4, during the longitudinal branch of the present invention, on each trunk fin 1, branch's fin 2 is arranged on the outer end of trunk fin 1, and preferred, the end of each trunk fin 1 is provided with Liang Ge branch fin 2, Liang Ge branch fin has a branch point being positioned on trunk fin 1, angle between contiguous branch fin 2 is selected 15 ℃-25 ℃, this can fully increase the area of dissipation of radiator under existence conditions, well utilize the convection current transfer function of air, heat loss through conduction effective and radiator combines the better radiating effect of arrival.
On each trunk fin 1, the shared branch point of contiguous branch fin 2 is greater than from outer wall (radiator body the is cylindrical structure) distance of substrate (radiator body is platy structure) or radiator body half that is less than trunk fin length.
The fin that carries out longitudinal branch requires the end points gap of adjacent Liang Ge trunk branch to be not more than the thickness of trunk fin 1.That is to say, the gap of contiguous branch fin 2 ends is greater than the thickness of trunk fin 2, and contiguous branch fin 2 is arranged on adjacent trunk fin 1.
In addition, radiator material used in the present invention is aluminium and aluminium alloy, is applicable to the high-power LED lamp effect of power more than 30W particularly evident.
In order to improve the heat-sinking capability of LED light fixture, traditional heat-dissipating device Optimization Design is mainly confined to transfer pair fin thickness, and fin quantity, fin length, fin are processed upper main by perforate, the aspects such as fin surface roughening processing.Radiator of the present invention adopts two kinds of forms of transverse branch and longitudinal branch, transverse branch is arranged evenly perpendicular to the both sides of fin, the outer end that longitudinal branch is fin is divided into branched, and respectively these two kinds of bifurcation approach are applied to circular radiator and rectangle radiator, so just increase the area of radiator, thereby reached the object that improves LED lamp heat-sinking capability.Outside two, an outstanding feature of the present invention is exactly to compare with the fin of traditional structure, and trunk fin thickness is all less than the thickness of traditional heat-dissipating sheet, and this only has small variation with regard to having guaranteed the weight of radiator.
As seen through the above analysis, traditional heat-dissipating device is the major part as radiator by fin only, and the structure of fin is not made the change of internal.And feature of the present invention is that each heat sink design is become to an independently radiator, each fin is by the structure that forms of self, dispelling the heat by more effective promotion LED light fixture.The radially-arranged radiator traditional structure of fin (as shown in Figure 5) and the two kinds of structures (as shown in figures 1 and 3) that the present invention relates to, test locking fin number is 16,20,24 3 groups, as shown in the table by the result calculating under the radially-arranged several different heat radiating fin structures of fin.
The radially-arranged simulation result of table 1 fin
Traditional structure refers to: circular radiator (referring to Fig. 5)
Scheme one: radiator body is cylindrical structure, the radiator that is applicable to high-powered LED lamp of transverse branch.(referring to Fig. 1)
Scheme two: radiator body is cylindrical structure, the longitudinally radiator that is applicable to high-powered LED lamp of branch.(referring to Fig. 3)
From the data result of table 1, can find out, scheme one involved in the present invention and the structure of scheme two can reduce junction temperature of chip accordingly, what especially scheme two was given optimizes structure when main fin is 16, and junction temperature has reduced by 18.9 ℃, and the effect after optimization is very obvious; When main fin count is 20 and 24, the junction temperature of scheme two also has 10 ℃ of above drop-out values, and the structure that can also find scheme one from test data is that junction temperature under 16 is that the junction temperature of 24 o'clock is low 2.8 ℃ than traditional structure fin number unexpectedly at fin number, the structure of scheme two is that junction temperature under 16 is that the junction temperature of 24 o'clock is low 16.8 ℃ than traditional structure fin number unexpectedly at fin number, and two schemes all can meet the object of using less material to reach better heat dissipation effect.
LED light fixture mainly carries out dissipation of heat by conduction heat exchange, heat convection and three kinds of modes of radiation heat transfer, wherein conduct its Main Function of heat exchange, and the effect of heat convection also can not be ignored, the effective binding energy of heat loss through conduction and heat loss through convection plays a multiplier effect.In conjunction with thermal conduction study knowledge analysis two kinds of structures of the present invention, why have than the better heat-sinking capability of traditional structure, exactly because given full play to the effect of heat convection, the heat that makes fin place distributes by the good alternately combination of heat convection and conduction heat exchange cleverly, has avoided temperature that conduction heat exchange simple in traditional heat-dissipating chip architecture causes too to concentrate and the phenomenon that can not distribute in time.
The above-mentioned specific embodiment non-limiting product form of the present invention and style, suitable variation or modification that any person of an ordinary skill in the technical field does it, all should be considered as not departing from patent category of the present invention.

Claims (8)

1. a fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator, is characterized in that: comprise a plurality of trunk fin (1) that are arranged on radiator body; On each trunk fin (1), be furnished with uniformly a plurality of branches fin (2).
2. the fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator according to claim 1, is characterized in that: each trunk fin (1) is upper, and the thickness of branch's fin (2) is less than the thickness of trunk fin (1).
3. the fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator according to claim 1, it is characterized in that: each trunk fin (1) is upper, and branch's fin (2) is perpendicular to trunk fin (1) surface at branch's fin (2) place.
4. the fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator according to claim 3, it is characterized in that: upper at each trunk fin (1), the thickness ratio of the gap between contiguous branch fin (2) and branch's fin (2) is 2.5-3.0.
5. according to the fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator described in claim 3 or 4, it is characterized in that: each trunk fin (1) is upper, branch's fin (2) of close radiator body and the gap that the gap between radiator body surface is greater than contiguous branch fin (2).
6. the fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator according to claim 1, it is characterized in that: on each trunk fin (1), branch's fin (2) is arranged on the outer end of trunk fin (1), and a plurality of branches fin (2) have a branch point being positioned on trunk fin (1).
7. the fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator according to claim 6, it is characterized in that: on each trunk fin (1), angle between contiguous branch fin (2) is 15 ℃-25 ℃, and the distance of branch point discrete heat device body is greater than half of trunk fin (2) length.
8. the fin that is applicable to high-power LED (Light-Emitting Diode) lamp radiator according to claim 1, it is characterized in that: the gap of contiguous branch fin (2) end is greater than the thickness of trunk fin (1), and contiguous branch fin (2) is arranged on adjacent trunk fin (1).
CN201410165834.8A 2014-04-23 2014-04-23 Cooling fin suitable for high-power LED lamp heat radiator Pending CN103939870A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104197250A (en) * 2014-09-22 2014-12-10 苏州承源光电科技有限公司 Vertical lawn lamp
CN104214574A (en) * 2014-09-22 2014-12-17 苏州承源光电科技有限公司 LED (Light Emitting Diode) indoor illumination lamp
CN104317327A (en) * 2014-09-01 2015-01-28 深圳航天东方红海特卫星有限公司 Temperature equilibrium apparatus for constructing whole-spacecraft thermal bus
CN104776338A (en) * 2015-04-24 2015-07-15 东莞市闻誉实业有限公司 Illuminating device
CN106015963A (en) * 2016-06-23 2016-10-12 太仓陶氏电气有限公司 LED lamp heat dissipation device uniform in heat dissipation
CN109519901A (en) * 2017-11-10 2019-03-26 中山市靓照光电科技有限公司 A kind of radiator structure

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Publication number Priority date Publication date Assignee Title
CN101660737A (en) * 2008-08-27 2010-03-03 富准精密工业(深圳)有限公司 Light emitting diode (LED) lamp
US20110261563A1 (en) * 2010-04-23 2011-10-27 Wavien, Inc. Liquid cooled led lighting device
CN202647662U (en) * 2012-05-15 2013-01-02 江苏银晶光电科技发展有限公司 Radiator for LED (Light-Emitting Diode) mining lamp
JP3180968U (en) * 2012-06-13 2013-01-17 崇賢 ▲黄▼ LED lamp heat dissipation device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101660737A (en) * 2008-08-27 2010-03-03 富准精密工业(深圳)有限公司 Light emitting diode (LED) lamp
US20110261563A1 (en) * 2010-04-23 2011-10-27 Wavien, Inc. Liquid cooled led lighting device
CN202647662U (en) * 2012-05-15 2013-01-02 江苏银晶光电科技发展有限公司 Radiator for LED (Light-Emitting Diode) mining lamp
JP3180968U (en) * 2012-06-13 2013-01-17 崇賢 ▲黄▼ LED lamp heat dissipation device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104317327A (en) * 2014-09-01 2015-01-28 深圳航天东方红海特卫星有限公司 Temperature equilibrium apparatus for constructing whole-spacecraft thermal bus
CN104197250A (en) * 2014-09-22 2014-12-10 苏州承源光电科技有限公司 Vertical lawn lamp
CN104214574A (en) * 2014-09-22 2014-12-17 苏州承源光电科技有限公司 LED (Light Emitting Diode) indoor illumination lamp
CN104776338A (en) * 2015-04-24 2015-07-15 东莞市闻誉实业有限公司 Illuminating device
CN106015963A (en) * 2016-06-23 2016-10-12 太仓陶氏电气有限公司 LED lamp heat dissipation device uniform in heat dissipation
CN109519901A (en) * 2017-11-10 2019-03-26 中山市靓照光电科技有限公司 A kind of radiator structure

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Application publication date: 20140723