CN105650566A - LED headlamp with heat dissipation structure - Google Patents
LED headlamp with heat dissipation structure Download PDFInfo
- Publication number
- CN105650566A CN105650566A CN201610052856.2A CN201610052856A CN105650566A CN 105650566 A CN105650566 A CN 105650566A CN 201610052856 A CN201610052856 A CN 201610052856A CN 105650566 A CN105650566 A CN 105650566A
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- China
- Prior art keywords
- led
- heat dissipation
- heat
- temperature
- radiating fin
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/42—Forced cooling
- F21S45/43—Forced cooling using gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention relates to an LED lighting technology, in particular to an LED headlamp with a heat dissipation structure. The LED headlamp comprises a low beam lamp set and a high beam lamp set; the low beam lamp set comprises 14 LED lamp beads, and the LED lamp beads are uniformly distributed on an inverted-trapezoidal aluminum substrate; the high beam lamp set comprises 16 LED lamp beads, and the LED lamp beads are uniformly distributed on a rectangular aluminum substrate; a heat homogenizing plate is flatly laid on the back surface of each substrate; 14 heat dissipation fins are connected to the back surface of each heat homogenizing plate, the length of the heat dissipation fins is 100 mm, the height of the heat dissipation fins is 25 mm, the thickness of the heat dissipation fins is 4 mm and the distance between the heat dissipation fins is 6 mm; two heat dissipation fans are connected under the heat dissipation fins; heat-conductive glue is adopted for connection between the substrates and the heat homogenizing plates, between the heat homogenizing plates and the heat dissipation fins and between the heat dissipation fins and the heat dissipation fans. According to the LED headlamp, by adopting the optimized lamp bead arrangement structure and the reasonable heat dissipation structure, the high power can be realized, and the junction temperature can be lower than the LED junction temperature of the national standard. In addition, the LED headlamp is simple in structure, high in applicability and suitable for being produced and popularized.
Description
Technical field
The present invention relates to a kind of LED illumination technology, especially relate to a kind of LED headlamp with radiator structure.
Background technology
LED luminescence band-to-band transition can produce light by electronics, and its spectrum does not include infrared part, and the heat of LED can not shed by radiation, and therefore LED is scheduled to as cold light source. But, the luminous efficiency of current LED is only capable of reaching 20%-35%, say, that also have the energy of 65%-80% to be converted to heat energy. If LED chip can not shed, understand the aging of accelerated luminescence chip, it is also possible to cause the internal solder joint fusing of LED, make chip failure. The temperature of LED chip be by ambient temperature power and LED luminescence chip and environment plus LED between the product of thermal resistance calculate, obviously, the temperature that wants to be effectively reduced luminescence chip also keeps that LED's is high-power, is necessary for from LED heat dissipation structure.
At the beginning of 21 century, small-power that LED begins to be applied in automobile illuminates, and LED is applied to the lower beam illumination of Lexus LS60hSaloon Herba Plantaginis illuminator by Japan Toyota Company first. At present, only some minority high-grade car companies of foreign country are by great power LED headlamp commercialization, and current less enterprise of China carries out research and development and the production of LED headlamp. Its maximum difficult problem is the heat dissipation problem of LED.
Heat radiation for current LED headlamp is studied, and outer many scholars achieve some achievements. 2006, Lai et al. devised a Herba Plantaginis illuminator being made up of 30 LED, and single led heating power is 2.5W, and what it adopted is that water-cooling heat radiating system dispels the heat, and simulation result obtains LED dipped beam and distance light junction temperature distribution uniform. 2008, SunhoJang of Korea S et al. devised a set of 30W great power LED headlamp radiating system device being made up of the LED of 30 1W, and it adopts heat dissipating method to be design one group of wind passage to carry out forced convertion heat radiation on lamp housing both sides, and last simulation result obtains
The maximum junction temperature of LED is only 34 DEG C. 2010, sieve waited quietly utilizing the various combination of heat pipe and radiating fin to have devised a LED headlamp heat abstractor.Obtaining at 50 DEG C of temperature of working environment finally by experimentation, high beam maximum temperature is 65 DEG C, and dipped headlights maximum temperature reaches 80 DEG C. What the LED low-beam light of LS600h adopted is resistant to elevated temperatures multiple LED light source, reduces single led caloric value, uses heat pipes to dispel the heat. One piece of LED headlight employing of Schefenacker company design is installed fan additional at LED back and is carried out heat loss through convection.
Designed LED headlamp power described above focuses mostly at 30-75W, much also rests on the conceptual simulation stage, does not carry out use truly. And most of heat sink conception is more complicated, occupies substantial amounts of lamp body structure, such as adopting liquid-cooling heat radiation and heat pipe heat radiation, fluid loop reliability is low, difficult in maintenance. Therefore, those skilled in the art need the research better great power LED headlamp of radiating effect.
Summary of the invention
In order to solve above-mentioned problem of the prior art, it is an object of the invention to provide a kind of LED headlamp with radiator structure, comprising:
Dipped headlights group, it includes the LED lamp bead 101 that 14 power is 3W, and LED lamp bead 101 is evenly arranged in above the inverted trapezoidal aluminium base of top margin 180mm base 135mm height 50mm;
High beam group, it includes the LED lamp bead 101 that 16 power is 3W, and LED lamp bead 101 is evenly arranged in above the rectangle aluminium base 102 of the wide 50mm of long 180mm;
One layer of temperature-uniforming plate 103 of substrate 102 back side tiling;
Temperature-uniforming plate 103 back side connects 14 pieces of radiating fins 104, the long 100mm of radiating fin 104, high 25mm, thick 4mm, and radiating fin 104 spacing is 6mm;
Radiating fin 104 is connected below two radiator fans;
By heat-conducting glue 105 adhesion that 0.5mm is thick between substrate and temperature-uniforming plate, between temperature-uniforming plate and each radiating fin and between radiating fin and radiator fan.
Traditional incoming mode has conduction of heat, thermal convection current, three kinds of heat transfer types of heat radiation. Owing to the operation principle of LED does not result in heat radiation, the present invention program does not account for thermal-radiating impact, and simply considers conduction of heat and thermal convection current.
The asymmetric meeting arranged due to LED lamp bead array causes the asymmetric of LED junction temperature distribution knot electricity, have to consider the symmetry of LED lamp bead when dipped headlights group with the LED lamp bead array arrangement of high beam group. The present invention arranges two row LED lamp bead on the inverted trapezoidal substrate of dipped headlights group: the first row, namely it is arranged with 8 lamp bead near that row of 180mm top margin, these 8 lamp bead are all apart from substrate top margin 5mm, both end of which lamp bead distance substrate top margin two ends 10mm, lamp bead spacing 20mm; Second row is arranged with 10 lamp bead, and these 10 lamp bead are all apart from the low limit 5mm of substrate, and both end of which lamp bead distance substrate top margin two ends 10mm, lamp bead spacing is all 20mm.
Temperature-uniforming plate plays the heat absorption in substrate average scattered effect in scheme provided by the invention, in order to the radiating fin being connected with it absorbs heat. Based on this purpose, the material of temperature-uniforming plate has to comply with the feature that heat conductivity is high. The material of temperature-uniforming plate can select aluminum, copper, silver or their alloy. Preferably, temperature-uniforming plate material is copper.
The effect that radiating fin plays in the present invention is to be dispelled the heat by the mode of free convection by the heat absorbed from temperature-uniforming plate. Namely free convection be transmitted in air by heat by the form of cooling fin surfaces Yu air contact to make radiating fin reach heat sinking function. Based on this principle, it is easy to show that radiating fin needs as far as possible big surface area. In offer scheme of the present invention, radiating fin attaches to the temperature-uniforming plate back side with heat conduction glue in the way of horizontally arranged mutually, and this mode both ensure that radiating fin can absorb heat from temperature-uniforming plate effectively, and the contact surface of radiating fin and air can be made again to maximize. The material of radiating fin can select aluminum, copper, silver or their alloy. Preferably, the material of radiating fin is copper.
Generally, natural convection cannot meet LED headlamp cooling requirements.The power of the LED headlamp described in this patent reaches 90W, if it is desired to reach ideal effect, not only needs to optimize radiating fin and designs to reach better free convection, in addition it is also necessary to adopt that forced convertion is cold goes mode, namely installs radiator fan at the fin back side.
Compared with prior art, the general power of the LED headlamp with radiator structure provided by the invention is 90W. Compared to the power of the 30W-45W of most commercialization LED headlamps at present, the present invention program has powerful advantage. The solution of the present invention, owing to adopting the lamp bead arrangement optimized and rational radiator structure, makes LED headlamp provided by the invention powerful ensure that its junction temperature is lower than GB LED junction temperature can realize simultaneously. And owing to the radiator structure of LED headlamp of the present invention is simple, the suitability is strong, is conducive to production and the popularization of LED headlamp.
Accompanying drawing explanation
The following is the cutline of accompanying drawing of the present invention, the accompanying drawing that the present invention uses is merely exemplary, it is impossible to be used for explaining protection scope of the present invention.
Fig. 1 is LED headlamp lamp bead distribution in embodiment 1: upper part is high beam group, and bottom is divided into dipped headlights group; With
Fig. 2 is LED headlamp fan-free model in embodiment 1.
Detailed description of the invention
Following example are being explained further the present invention program, so that although foregoing invention scheme is had understanding more intuitively to have specific descriptions herein with understanding principles of the invention by those skilled in the art, but those skilled in the art is to be understood that, this description only carries out by way of example, and not as the restriction about the scope of the present invention. Except exemplary embodiment that is shown herein and that describe, within the scope of the invention by other embodiments of the amendment of those of ordinary skill in the art and replacement, it is regarded as within the scope of the invention.
Embodiment 1:
A kind of LED headlamp with radiator structure, comprising:
(1) dipped headlights group, it includes the LED lamp bead 101 that 14 power is 3W, and LED lamp bead 101 is evenly arranged in above the inverted trapezoidal aluminium base of top margin 180mm base 135mm height 50mm, and concrete pattern is as shown in Figure 1;
(2) high beam group, it includes the LED lamp bead 101 that 16 power is 3W, and LED lamp bead 101 is evenly arranged in above the rectangle aluminium base of long 180mm width 50mm, and concrete pattern is as shown in Figure 1;
(3) one layer of temperature-uniforming plate 103 of aluminium base 102 back side tiling, the material of described aluminium sheet temperature-uniforming plate is copper, the long 180mm of temperature-uniforming plate, wide 100mm, high 1mm;
(4) temperature-uniforming plate 103 back side connects 14 pieces of radiating fins 104, the long 100mm of radiating fin 104, high 25mm, thick 4mm, radiating fin 104 spacing is 6mm, the material of radiating fin 104 is copper, and radiating fin 104 attaches to the temperature-uniforming plate back side with heat conduction glue in the way of horizontally arranged mutually, and it arranges concrete pattern as shown in Figure 2;
(5) radiating fin is connected below two radiator fans;
(6) between substrate and temperature-uniforming plate, by heat-conducting glue 105 adhesion that 0.5mm is thick between temperature-uniforming plate and each radiating fin and between radiating fin and radiator fan.
This LED headlamp is connected to driving power supply, thermometric test under Natural Convection Conditions: LED headlamp is put in calorstat, the ambient temperature (25 DEG C) that regulating thermostatic case extremely sets, radiator fan is now kept not to be operated, make LED headlamp work 2h by Standard, now only allow LED low-beam light group be operated, after temperature remains stable for, measure the aluminium base point place temperature of each LED with LED heat galvanic couple, and take its meansigma methods.It is 50 DEG C that result records its mean temperature, owing to power LED thermal resistance is 5 DEG C/W, therefore thus can substantially calculate that LED junction temperature is approximately 65 DEG C; When high beam group works, recording aluminium base mean temperature is 52 DEG C, therefore extrapolates LED junction temperature and be approximately 67 DEG C. In like manner, regulating thermostatic case, to temperature to 50 DEG C, finally draws LED low-beam light group junction temperature 86 DEG C, and the junction temperature of LED high beam group is 90 DEG C. Therefore, in free convection situation, LED headlamp junction temperature is higher, it is impossible to meet Standard, so forced heat radiation must be carried out.
Above-mentioned LED headlamp is connected to driving power supply, carry out thermometric test under forced convection conditions: put in calorstat by LED headlamp, the ambient temperature (25 DEG C) that regulating thermostatic case extremely sets, radiator fan is now kept to be operated, make LED headlamp work 2h by Standard, now only allow LED low-beam light group be operated, after temperature remains stable for, measure the aluminium base point place temperature of each LED with LED heat galvanic couple, and take its meansigma methods. Recording its LED low-beam light group junction temperature is 71 DEG C, and LED high beam group junction temperature is 75 DEG C. This is it is shown that after installing fan additional, radiating effect is greatly increased, and LED junction temperature is greatly lowered, and under 50 DEG C of ambient temperature conditions, LED headlamp maximum junction temperature is 75 DEG C, meets GB LED junction temperature less than 80 DEG C of requirements.
Claims (4)
1. the LED headlamp with radiator structure, comprising:
Dipped headlights group, it includes the LED lamp bead (101) that 14 power is 3W, and LED lamp bead (101) is evenly arranged in above the inverted trapezoidal aluminium base of top margin 180mm base 135mm height 50mm;
High beam group, it includes the LED lamp bead (101) that 16 power is 3W, and LED lamp bead (101) is evenly arranged in the rectangle aluminium base (102) of long 180mm width 50mm above;
One layer of temperature-uniforming plate (103) of substrate (102) back side tiling;
Temperature-uniforming plate (103) back side connects 14 pieces of radiating fins (104), radiating fin (104) long 100mm, high 25mm, thick 4mm, and radiating fin (104) spacing is 6mm;
Radiating fin (104) is connected below two radiator fans;
By heat-conducting glue (105) adhesion that 0.5mm is thick between substrate and temperature-uniforming plate, between temperature-uniforming plate and each radiating fin and between radiating fin and radiator fan.
2. the LED headlamp with radiator structure according to claim 1, it is characterised in that: described LED lamp bead (101) spacing is 20mm.
3. the LED headlamp with radiator structure according to claim 1, it is characterised in that: the material of described temperature-uniforming plate (103) is aluminum, copper, silver or their alloy.
4. the LED headlamp with radiator structure according to claim 1, it is characterised in that: the material of described radiating fin (104) can select aluminum, copper, silver or their alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610052856.2A CN105650566A (en) | 2016-01-27 | 2016-01-27 | LED headlamp with heat dissipation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610052856.2A CN105650566A (en) | 2016-01-27 | 2016-01-27 | LED headlamp with heat dissipation structure |
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| CN105650566A true CN105650566A (en) | 2016-06-08 |
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| CN201610052856.2A Pending CN105650566A (en) | 2016-01-27 | 2016-01-27 | LED headlamp with heat dissipation structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107027271A (en) * | 2017-04-28 | 2017-08-08 | 深圳市华星光电技术有限公司 | Liquid crystal display television cooling system and LCD TV |
| CN107795950A (en) * | 2017-09-29 | 2018-03-13 | 无锡昊瑜节能环保设备有限公司 | A kind of car lighting lamp |
| CN109114519A (en) * | 2017-06-23 | 2019-01-01 | 法雷奥照明公司 | Lighting module for motor vehicles |
| US10477735B2 (en) | 2017-04-28 | 2019-11-12 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Heat dissipation system for use with liquid crystal television and liquid crystal television |
| CN113203076A (en) * | 2021-04-08 | 2021-08-03 | 一汽奔腾轿车有限公司 | Matrix type high beam active heat dissipation system for passenger vehicle and control method thereof |
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| CN201242126Y (en) * | 2008-07-18 | 2009-05-20 | 上海小糸车灯有限公司 | Heat sink radiating assembly of LED light source automobile head lamp |
| CN102102867A (en) * | 2009-12-18 | 2011-06-22 | 谢庆生 | Temperature-uniformizing heat dissipation method for high-power LED street lamp |
| CN102235650A (en) * | 2010-04-30 | 2011-11-09 | 杨继远 | High-power light-emitting diode (LED) radiator and using method thereof |
| CN203656762U (en) * | 2013-12-17 | 2014-06-18 | 江苏文光车辆附件有限公司 | Rear fog lamp used for automobile |
| CN104728809A (en) * | 2015-03-25 | 2015-06-24 | 句容市万福达工艺品厂 | Passive cooling structure design of automobile LED headlamp |
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2016
- 2016-01-27 CN CN201610052856.2A patent/CN105650566A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201242126Y (en) * | 2008-07-18 | 2009-05-20 | 上海小糸车灯有限公司 | Heat sink radiating assembly of LED light source automobile head lamp |
| CN102102867A (en) * | 2009-12-18 | 2011-06-22 | 谢庆生 | Temperature-uniformizing heat dissipation method for high-power LED street lamp |
| CN102235650A (en) * | 2010-04-30 | 2011-11-09 | 杨继远 | High-power light-emitting diode (LED) radiator and using method thereof |
| CN203656762U (en) * | 2013-12-17 | 2014-06-18 | 江苏文光车辆附件有限公司 | Rear fog lamp used for automobile |
| CN104728809A (en) * | 2015-03-25 | 2015-06-24 | 句容市万福达工艺品厂 | Passive cooling structure design of automobile LED headlamp |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107027271A (en) * | 2017-04-28 | 2017-08-08 | 深圳市华星光电技术有限公司 | Liquid crystal display television cooling system and LCD TV |
| CN107027271B (en) * | 2017-04-28 | 2019-04-30 | 深圳市华星光电技术有限公司 | Liquid crystal display television cooling system and LCD TV |
| US10477735B2 (en) | 2017-04-28 | 2019-11-12 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Heat dissipation system for use with liquid crystal television and liquid crystal television |
| CN109114519A (en) * | 2017-06-23 | 2019-01-01 | 法雷奥照明公司 | Lighting module for motor vehicles |
| CN107795950A (en) * | 2017-09-29 | 2018-03-13 | 无锡昊瑜节能环保设备有限公司 | A kind of car lighting lamp |
| CN113203076A (en) * | 2021-04-08 | 2021-08-03 | 一汽奔腾轿车有限公司 | Matrix type high beam active heat dissipation system for passenger vehicle and control method thereof |
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Application publication date: 20160608 |