CN102235598A - High-power light-emitting diode (LED) illumination device with high light transmittance and radiating efficiency - Google Patents
High-power light-emitting diode (LED) illumination device with high light transmittance and radiating efficiency Download PDFInfo
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- CN102235598A CN102235598A CN2010101642178A CN201010164217A CN102235598A CN 102235598 A CN102235598 A CN 102235598A CN 2010101642178 A CN2010101642178 A CN 2010101642178A CN 201010164217 A CN201010164217 A CN 201010164217A CN 102235598 A CN102235598 A CN 102235598A
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Abstract
The invention relates to a high-power light-emitting diode (LED) illumination device with high light transmittance and radiating efficiency. The device comprises an LED chip, a connecting wire, a cathode, a lens, a radiating part and an outer package, wherein the radiating part comprises a heat pipe radiator contacted with the LED chip, and a radiating fin contacted with the heat pipe radiator; and the lens has a batwing light distribution design. The heat of the radiating fin can be quickly diffused to air by a heat pipe radiating technology, and the device has high radiating efficiency, small volume and light weight, so that the service life of a product can be obviously prolonged, the using safety of the product is improved, the lens with the batwing light distribution design improves the light transmittance of the device, and the production cost and using cost of the product are reduced.
Description
Technical field
The present invention relates to a kind of LED lighting apparatus, particularly relate to the high-power LED illuminating device of a kind of high transmission rate, high cooling efficiency.
Background technology
In recent years, high-power LED (light emitting diode) lighting equipment is based on the advantage at aspects such as energy-conservation, efficient, environmental protection, obtains application more and more widely and constantly improves.And 80% be converted to heat energy owing to have an appointment in the electric energy that consumed of LED luminaire, have only fraction to be converted to luminous energy, therefore, improving heat dispersion and light transmission efficiency is the technical essential of LED lighting device, especially for high-power LED illuminating device, the quality of heat dissipation design has directly influenced the luminosity attenuation rate and the service life of device.
See also Fig. 1, shown in Figure 2, existing high-power LED (light emitting diode) lighting equipment mainly is made up of led chip 1, connecting line 2, negative electrode 3, lens 4, thermal component 5 and outer package 6.Wherein thermal component 5 radiating modes commonly used mainly are Natural Heat Convection and fan forced heat radiation.The fan radiating system complexity, reliability is low and the service life of fan is very short.Therefore the use of natural heat dissipation is more extensive, and the area of dissipation of natural heat dissipation, heat-shift are limited, and radiator itself is heavier, has increased the weight of the load of lamp stand, and its external force resistance ability is reduced.In addition, existing high-power LED (light emitting diode) lighting equipment also needs to install additional once more lens when mounted, can obviously reduce the light transmittance of lens like this, and can deaden distributing fast of heat.
This shows that above-mentioned existing high-power LED illuminating device obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.How to found a kind of light transmittance height, good heat dissipation effect, long service life, the new high transmission rate that weight is lighter, the high-power LED illuminating device of high cooling efficiency, the current industry utmost point of real genus needs improved target.
Summary of the invention
The technical problem to be solved in the present invention provides the high-power LED illuminating device of a kind of high transmission rate, high cooling efficiency, makes its light transmittance height, good heat dissipation effect, long service life, weight lighter, thereby overcomes the deficiency of existing high-power LED illuminating device.
For solving the problems of the technologies described above, the high-power LED illuminating device of a kind of high transmission rate of the present invention, high cooling efficiency, comprise led chip, connecting line, negative electrode, lens, thermal component and outer package, described thermal component comprises the heat-pipe radiator that contacts with led chip, and the fin that contacts with heat-pipe radiator; Described lens adopt the design of batswing tab luminous intensity distribution.
As a kind of improvement of the present invention, described heat-pipe radiator is the loop heat pipe radiator.
Be coated with thermal conductive insulation glue between the evaporator wall of described led chip and loop heat pipe radiator.
The heat pipe of described loop heat pipe radiator is made for the copper powder sintering process.
Described loop heat pipe radiator adopts antifreeze superconduction working solution.
Described fin surface is provided with the automatically cleaning layer.
Described automatically cleaning layer is micron or nano particle sprayed coating.
Described lens adopt the batswing tab intensity Distribution Design of 60 ° of 120 ° of *.
After adopting such design, the present invention utilizes the heat pipe heat radiation technology to be dispersed into the heat of fin in the air fast, radiating efficiency height, volume are little, in light weight, thereby can obviously prolong the service life of product, and the safety in utilization of raising product, the lens of batswing tab luminous intensity distribution design have also improved the light transmittance of device, have reduced the production and the use cost of product.
Description of drawings
Above-mentioned only is the general introduction of technical solution of the present invention, and for can clearer understanding technological means of the present invention, the present invention is described in further detail below in conjunction with accompanying drawing and the specific embodiment.
Fig. 1 is the structural representation of existing high-power LED illuminating device.
Fig. 2 is the generalized section of Fig. 1.
Fig. 3 is the structural representation of the high-power LED illuminating device of a kind of high transmission rate of the present invention, high cooling efficiency.
Fig. 4 is the distribution curve flux figure of the high-power LED illuminating device of a kind of high transmission rate of the present invention, high cooling efficiency.
The specific embodiment
See also shown in Figure 3, the high-power LED illuminating device of a kind of high transmission rate of the present invention, high cooling efficiency, the structural design of led chip 1, connecting line 2, negative electrode 3, lens 4, thermal component 5 and the outer package 6 identical with the prior art employing, but in the design of thermal component 5, comprised and led chip 1 contacted heat-pipe radiator 51, and the fin 52 that contacts with this heat-pipe radiator 51, lens 4 have also been adopted the design of batswing tab luminous intensity distribution.
Wherein, heat-pipe radiator 51 preferred loop heat pipe radiators are made up of shell, imbibition core and end cap usually.Shell can adopt the copper powder sintering process to make, negative pressure state is pumped in inside, charge into low, the volatile liquid of boiling point, the antifreeze superconduction working solution of happy heat pipe working solution A type etc. in preferred morning works long hours to be suitable for the open air, and the imbibition core is made and is arranged on the tube wall by the capillary porous material.Heat pipe is an evaporation ends for one section, other one section is condensation end, the heated liquid that is positioned at evaporation ends evaporates rapidly, steam flows to condensation end under small pressure differential, and discharge heat, and regelation becomes liquid, and liquid flows back to evaporation ends at capillary force effect lower edge imbibition core, so circulation is more than, rapidly and continuously heat is reached an other end by heat pipe one end.The loop heat pipe radiator can be avoided the phase mutual interference of gas-liquid mixed flow, heat transfer efficiency is higher, and have that the general heat pipe isothermal is good, heat transfer area can change, be beneficial to plurality of advantages such as remotely transferring, temperature controllable, noiselessness arbitrarily, the radiator temperature rise can be controlled in 18 ℃, thereby guarantee led chip long-play under effective junction temperature condition, obviously prolong the service life of LED.
In order to study the heat transfer property of thermal component cooling great power LED of the present invention, we have set up pilot system, and have set up the data collecting instrument hardware system of thermocouple temperature measurement based on grinding magnificent ADAM-4018 data collecting card and ADAM-4520 converter.The signal of telecommunication that copper-Kang Gang thermocouple (model is the K type) records is gathered, by the computer software and hardware system signal of telecommunication that collects is carried out analyzing and processing then, obtain real-time temperature value.Data acquisition and the software systems that dynamically show then make up based on grinding magnificent KingView software platform.
Adopt thin resistive heater to simulate high-power LED chip.Thin resistive heater is attached to the loop heat pipe base of evaporator, and the thickness of thin resistive heater is 0.2mm, and maximum heating power is 120W, and only the face that contacts with heat pipe can transmit heat, and its lap all adopts the heat-insulating material insulation.For the ease of observing the flow regime of inside heat pipe working medium, on steam pipework and liquid line, respectively installed peep hole additional, this peep hole is made up of a transparent quartz glass and a jockey.
Experiment condition:
Evaporimeter inside dimension: 70mm (length) * 55mm (wide) * 5mm (height);
The steam pipework size: long is 140mm, and internal diameter is 6mm, and thickness of pipe wall is 1mm;
Liquid line size: length 1100mm, internal diameter are 6mm, and thickness of pipe wall is 1mm;
Cycle fluid: redistilled water;
Heat flow density scope q:3.6 * 104～1.0 * 105W/m
2
The heat pipe liquid filled ratio ratio of loop cumulative volume (the working medium volume with) ξ: 50%;
Heat pipe operating pressure and corresponding saturation temperature: 0.07375 * 105Pa (40 ℃), 0.12335 * 105Pa (50 ℃), 0.19920 * 105Pa (60 ℃), 0.3116 * 105Pa (70 ℃), 0.7011 * 105Pa (90 ℃);
Thin resistive heater: the area of thin resistive heater is 70mm * 55mm, equates with the following table area of evaporimeter;
The D.C. regulated power supply specification is: 0～35V, 20A;
The type of cooling of condenser: the natural wind cooling, wind speed is about 1m/s, is measured by anemobiagraph;
Steam pressure is measured: pressure sensor;
The environment temperature of test: 25 ℃.
Experimental result shows that the performance of loop heat pipe is very excellent, and when input power was 30W, heat pipe can start rapidly in 5min, the good stability of heat pipe, and the temperature of film resistor is controlled in about 55 ℃ all the time.Again through repeatedly experimental verification, heat pipe can both promptly start in the 6min, stable operation under the condition of different input power, different setting angle: angle is identical, and when input power was big, heat pipe started rapidly; Input power is identical, and when angle was little, the startup of heat pipe was rapider.For making heat-pipe radiator performance maximal efficiency, when suggestion is installed to be not less than 12 degree inclination angles for well.
In addition, please cooperate and consult shown in Figure 4ly, lens 4 are the best with the batswing tab intensity Distribution Design of 60 ° of 120 ° of *, and its once light-distribution design can be elongated lighting angle, need not during installation to add lens or reflector again, thereby reduce luminous loss, reduce heat accumulative total and save production and use cost.Because the high-power LED encapsulation form generally adopts surface mount, closely links to each other with the heat pipe heat radiation wall in order to make led chip, can apply thermal conductive insulation glue between the evaporator wall of described led chip and loop heat pipe radiator.Also can set up automatically cleaning layers such as micron or nano particle sprayed coating on fin 52 surfaces, prevent the influence to the fin radiating effect such as dust, rainwater.
The high-power LED illuminating device of high transmission rate of the present invention, high cooling efficiency not only light transmittance is higher, the loop heat pipe heatsink weight that it adopted is 0.515KG only, the LED street lamp of 120W only weighs 4.8 kilograms, load-bearing is more reasonable, use safelyr, and volume is little, radiating efficiency is high, Heat stability is good, thermal resistance are little, be beneficial to the service life that prolongs lighting apparatus.And radiator portion and device portions are two independent cavitys, heat is conducted heat to heat-pipe radiator by the great power LED backboard, heat pipe conducts heat to fin rapidly, cooperate free convection to conduct heat in the air, avoid the heat accumulation on led chip, perfectly solved the airtight contradiction with heat loss through convection of device.
The above; it only is preferred embodiment of the present invention; be not that the present invention is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.
Claims (8)
1. the high-power LED illuminating device of a high transmission rate, high cooling efficiency comprises led chip, connecting line, negative electrode, lens, thermal component and outer package, it is characterized in that:
Described thermal component comprises the heat-pipe radiator that contacts with led chip, and the fin that contacts with heat-pipe radiator;
Described lens adopt the design of batswing tab luminous intensity distribution.
2. the high-power LED illuminating device of a kind of high transmission rate according to claim 1, high cooling efficiency is characterized in that described heat-pipe radiator is the loop heat pipe radiator.
3. the high-power LED illuminating device of a kind of high transmission rate according to claim 2, high cooling efficiency is characterized in that being coated with thermal conductive insulation glue between the evaporator wall of described led chip and loop heat pipe radiator.
4. the high-power LED illuminating device of a kind of high transmission rate according to claim 2, high cooling efficiency is characterized in that the heat pipe of described loop heat pipe radiator is made for the copper powder sintering process.
5. the high-power LED illuminating device of a kind of high transmission rate according to claim 2, high cooling efficiency is characterized in that described loop heat pipe radiator adopts antifreeze superconduction working solution.
6. the high-power LED illuminating device of a kind of high transmission rate according to claim 1, high cooling efficiency is characterized in that described fin surface is provided with the automatically cleaning layer.
7. the high-power LED illuminating device of a kind of high transmission rate according to claim 6, high cooling efficiency is characterized in that described automatically cleaning layer is micron or nano particle sprayed coating.
8. according to the high-power LED illuminating device of each described a kind of high transmission rate, high cooling efficiency among the claim 1-7, it is characterized in that described lens adopt the batswing tab intensity Distribution Design of 60 ° of 120 ° of *.
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| CN2010101642178A CN102235598A (en) | 2010-05-06 | 2010-05-06 | High-power light-emitting diode (LED) illumination device with high light transmittance and radiating efficiency |
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| CN2010101642178A CN102235598A (en) | 2010-05-06 | 2010-05-06 | High-power light-emitting diode (LED) illumination device with high light transmittance and radiating efficiency |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100756897B1 (en) * | 2007-01-26 | 2007-09-07 | 주식회사 혜성엘앤엠 | Led lighting lamp |
| CN201103806Y (en) * | 2007-09-03 | 2008-08-20 | 廖钦彬 | LED lamp |
| CN101526200A (en) * | 2008-03-06 | 2009-09-09 | 三星电机株式会社 | LED illumination device and radiating member thereof |
| CN101545586A (en) * | 2009-04-22 | 2009-09-30 | 郭培囵 | Heat-radiation LED illuminating lamp of loop heat-tube heat radiator |
-
2010
- 2010-05-06 CN CN2010101642178A patent/CN102235598A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100756897B1 (en) * | 2007-01-26 | 2007-09-07 | 주식회사 혜성엘앤엠 | Led lighting lamp |
| CN201103806Y (en) * | 2007-09-03 | 2008-08-20 | 廖钦彬 | LED lamp |
| CN101526200A (en) * | 2008-03-06 | 2009-09-09 | 三星电机株式会社 | LED illumination device and radiating member thereof |
| CN101545586A (en) * | 2009-04-22 | 2009-09-30 | 郭培囵 | Heat-radiation LED illuminating lamp of loop heat-tube heat radiator |
Non-Patent Citations (1)
| Title |
|---|
| 武止戈: "《建筑环境物理测试》", 31 December 1989 * |
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Application publication date: 20111109 |