The isolated form heat abstractor of LED light fixture
The utility model belongs to the LED lighting technical field, particularly relates to a kind of isolated form heat abstractor of LED light fixture.
The not only energy-saving and environmental protection of LED lighting engineering, also have the life-span long, volume is little, safe, photochromic characteristics such as abundant, easy to control.The LED illumination is the key core technology of little by little having grasped few in number, has market demand prospect, possesses the strategic new industry that the resource energy consumption is low, drive characteristics such as coefficient is big, job opportunity is many, comprehensive benefit is good.It has not only brought the revolution of another lighting source after incandescent lamp, fluorescent lamp on the illumination history, and is the important channel of energy-saving and emission-reduction, will bring into play more importantly effect to the development low-carbon economy.Therefore, the relevant application product of LED illumination is all done one's utmost to develop by each manufacturer.
But there is a very big heat radiation difficult problem in the LED lamp.Heat dissipation problem is the bottleneck of LED lamp in illumination application always, is never effectively solved.LED has relatively high expectations to heat dissipation technology, and the temperature of LED wick sheet sharply rises when the effect of radiator is bad, can produce light decay very soon, even damages led chip.The temperature of the high more chip of the heat flow density of led chip rises fast more, has only the heat dissipation technology that solves LED, delays the light decay of LED to greatest extent, just can embody long advantage of life-span, makes LED become real in the large-area applications of indoor and outdoor lighting.
The heat radiation of current LED lamp or module is adopted die-casting die and section bar heronsbill radiator mostly or is adopted aluminium ingot Digit Control Machine Tool processing heat radiator and hot pipe technique.This die-casting die radiator heat-dissipation weak effect, volume is also bigger.The geometry of heronsbill structure radiator is fixing, and fin density is little, is difficult for heat radiation, is prone to dust stratification dirt in the fin.The hot pipe technique cost is high, and it is undesirable to be used on the LED light fixture radiating effect, adopts the radiator of aluminium ingot Digit Control Machine Tool processing, and its development cost are very high.
Driving power on the existing LED light fixture is contained in the radiator the inside, does not carry out insulation and heat insulating construction measure, and causes that the heat of LED driving power has increased the temperature of radiator, causes the temperature rising of LED lamp and produces serious light sorrow.
Summary of the invention
For solving the radiating effect of section bar heronsbill radiator; On the patent of invention of having authorized " upright post type LED heat radiator " basis (ZL200710046842.0); Research and solve the improvement on this heat spreader structures and be fit to do bulb lamp, LED Down lamp, shot-light and suspension lamp; And improve the problem of its radiating effect, and to solve electric insulation and adiabatic problem that driving power is contained in the radiator the inside simultaneously, the utility model provides a kind of isolated form heat abstractor of LED light fixture.
The utility model solves the technical scheme that its technical problem adopted: comprise insulation lamp holder, LED drive plate, isolated base, upright post type radiator, heat transfer cylinder and heat transfer plate; When being used for semiconductor lighting, with the LED aluminium base that is fixed with the LED lamp with bolt on the bottom surface of heat transfer plate.
Be evenly distributed with the heat conduction fin on the inwall of so-called heat transfer cylinder; Segmentation is provided with conducting strip and arranges with the pair of corresponding mode on the outside; On the end of its conducting strip, extend corresponding fin and convective cover; And a pair of conducting strip and another be to being provided with fin between the conducting strip, and surrounded by convective cover.The adjacent fin parallel arranged of fin with other, but with the not parallel arrangement of conducting strip, between heat transfer cylinder and conducting strip, be provided with fixing hole.
On the bottom surface of upright post type radiator, be fixed with heat transfer plate in addition, and be connected with the heat conduction fin above the heat transfer plate, on the heat conduction fin, cover with dissipating cover at it.
Be fixed with the LED drive plate above the so-called isolated base; And be insulated that lamp holder covers or power pack covers; Have thermovent above the insulation lamp holder, have thermovent, be provided with the base fixed mount at the side surrounding of isolated base in the side of power pack; Chain is connected to the insulator pin pipe below it, and passes heat transfer plate and LED aluminium base.
Fill up heat-conducting filler between LED drive plate and the metal screw socket; On the LED drive plate, be fixed with splicing ear; Be electrically connected with the LED aluminium base at the electric power connection line of splicing ear internal diameter through the insulator pin pipe; Seal with heat conductive silica gel in the outside of insulator pin pipe and the electric power connection line of internal diameter simultaneously, the LED aluminium base is prevented dust or steam by the lampshade sealing.
Below upright post type radiator and heat transfer plate, be fixed with lampshade or reflector.The inner face of reflector is provided with brilliant brick line.
LED light fixture specification kind of light fixture when practical application is a lot, thus the outside shape of upright post type radiator can be changed, also can the various lampshades of conversion, so that lampshade shape and radiator that the optional cooperation of the light fixture of different size is fitted improve its radiating effect.
The beneficial effect of the utility model is; Because the inwall of heat transfer cylinder is provided with the heat conduction fin; On its outside, be provided with conducting strip, on the end of its conducting strip, extend fin, and a pair of conducting strip and another is to having increased heat conduction fin and convective cover between the conducting strip.On the heat of heat transfer plate conducts to heat conduction fin and fin rapidly through the heat transfer cylinder; Pass through the stack effect of convective cover again; Carry out heat exchange with surrounding air, be dispersed into heat in the air and reduce the temperature rise of heat transfer plate and LED aluminium base, guarantee that the LED lamp works in the temperature range of permission; Prevent light decay, prolong the life-span of LED lamp.
Secondly advantage is; With isolated base and insulator pin pipe, isolate the metal parts of LED drive plate and outside heat generating components and conduction fully, guarantee the security performance of light fixture; And the temperature of reduction LED drive plate; Improve the functional reliability of LED drive plate, prolong the service life of electronic devices and components, particularly electrolytic capacitor.
The upright post type radiator is to adopt the good aluminium material of thermal conductivity, is integral with extrusion process, and can cuts use, compact conformation.Also can adopt the good material of thermal conductivity, be integral, reduce material cost with extrusion process.
Description of drawings
Fig. 1 is the part section structural map of first kind of embodiment of the utility model.
Fig. 2 is the vertical view of first kind of embodiment of Fig. 1.
Fig. 3 is the end face structure figure of first kind of embodiment of the neutral columnar radiators of Fig. 1.
Fig. 4 is the end face structure figure of second kind of embodiment of the neutral columnar radiators of Fig. 1.
Fig. 5 is the part section structural map of second kind of embodiment of the utility model.
Fig. 6 is the part section structural map of the third embodiment of the utility model.
1. insulation lamp holders among the figure, 101. thermovents, 102. metal screw sockets, 103. heat-conducting fillers, 2.LED driving stage, 201. splicing ears; 3. isolated base, 301. insulator pin pipes, 302. base fixed mounts, 4. dissipating cover, 5. bolt, 6. heat transfer cylinder; 601. fixing hole, 7. heat conduction fin, 8. heat transfer plate, 9.LED aluminium base, 10. lampshade, 11. upright post type radiators; 12. fin, 13. convective covers, 14. conducting strips, 15. fins, 16. fins; 17. conducting strip, 18. reflectors, 19. brilliant brick lines, 20. power packs, 21. thermovents.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed explanation.
The utility model is contained in inside the radiator for very big heat radiation difficult problem overcoming that existing LED light fixture never effectively solved and the LED driving power on the LED light fixture and radiator receives the warming-up effect and the electric insulation safety problem of electronic devices and components; The utility model provides a kind of isolated form heat abstractor of LED light fixture; The isolated form heat abstractor of this LED light fixture; Taked the rational structure measure, electric insulation and heat-insulating problem are effectively solved.
By Fig. 1～shown in Figure 6; The utility model comprises insulation lamp holder 1, LED drive plate 2, isolated base 3, upright post type radiator 11, heat transfer cylinder 6 and heat transfer plate 8, when being used for semiconductor lighting, and the LED lamp of on LED aluminium base 9, burn-oning earlier and choosing; Coated with thermally conductive silicone grease on the bottom surface of heat transfer plate 8 then; Be fixed in LED aluminium base 9 usefulness bolts 5 above the heat-conducting silicone grease,, the heat of LED aluminium base 9 passed on the heat transfer plate 8 rapidly so that reduce thermal contact resistance.
On the inwall of heat transfer cylinder 6, be evenly distributed with heat conduction fin 7, segmentation is provided with conducting strip 14 and 17 and arrange with the pair of corresponding mode on the outside, on the end of its conducting strip 14 and 17, extends corresponding fin 15,16 and convective cover 13.Conducting strip 14 and 17 can be the conduction of the heat on the heat transfer cylinder 6, through fin 15,16 heat radiations.Between a pair of conducting strip and another are to conducting strip, increasing fin 12 is exactly the surface area that increases heat transfer cylinder 6, and is surrounded by convective cover 13, forms stack effect like this and gives out the heat of heat transfer cylinder 6 rapidly.
Fin 12 adjacent fin parallel arranged, but and other conducting strips 14 and 17 not parallel arrangements with other.The interval of adjacent like this fin is identical; The root of fin 12 is consistent with the interval of peripheral ends; Different fully with the common mode sunflower radiating rib arrangement mode on other existing markets, be very beneficial for the heat radiation of fin 12 and can fully carry out heat exchange with surrounding air.The root of common mode sunflower radiating rib is too close at interval, and surface area is possibly increase, but is unfavorable for cross-ventilation.
Between heat transfer cylinder 6, conducting strip 14 and 17, open fixing hole 601, so that fixedly isolated base 3 or reflector 18.
At the end of upright post type radiator 11 and on be fixed with heat transfer plate 8, and be connected with heat conduction fin 7 above the heat transfer plate 8 at it.The LED light fixture under given environment temperature to light luminescent lifetime very long, aerial dust can drop on heat transfer plate 8 above.So, be provided with heat conduction fin 7 above the heat transfer plate 8 at it, increase the surface area of heat transfer plate 8.When dust covered heat transfer plate 8 top, the heat of its heat transfer plate 8 was through distributing in 7 conduction of heat conduction fin, so played the surface area of the additional heat transfer plate 8 that reduces because of the dust that falls.Heat transfer plate 8 not only plays conduction LED aluminium base 9 heats and must act on, and the effect that also has is that the tight fit of heat transfer plate 8 and heat transfer cylinder 6 inwalls is connected, so that reduce thermal contact resistance.Environment for use according to light fixture also can cover with dissipating cover 4 on heat conduction fin 7, so as not to heat transfer plate 8 above a large amount of dusts that fall, also give out the heat on the heat conduction fin 7 simultaneously.
Fixing capable LED drive plate 2 on isolated base 3; And be insulated lamp holder 1 or power pack 20 covers; Have thermovent 101 above the insulation lamp holder 1, the side of power pack 20 has thermovent 21, is provided with base fixed mount 302 at the side surrounding of isolated base 3; Below it, be connected with insulator pin pipe 301, and pass heat transfer plate 8 and realize the electric insulation of LED drive plate 2 and heat insulation with LED aluminium base 9.The fairlead of LED aluminium base 2 is only opened single insulator pin pipe 301 during heart position therein, gets final product if should be provided with two insulator pin pipes 301 of both positive and negative polarity in the bottom surface of isolated base 3 when the positive and negative lead wires hole of LED aluminium base 9 separately forms two holes.
Fill up heat-conducting filler 103 between LED drive plate 2 and the metal screw socket 102, so that the components and parts heat of LED drive plate 2 is through metal screw socket 102 quick heat radiatings; On LED drive plate 2, be fixed with splicing ear 201; So that change the maintenance of LED drive plate 2; Be electrically connected with LED aluminium base 9 at the electric power connection line of splicing ear 201 internal diameter through insulator pin pipe 301; Seal with heat conductive silica gel in the outside of insulator pin pipe 301 and the electric power connection line of internal diameter simultaneously, also have LED aluminium base 9 to be prevented dust or steam by lampshade 10 sealings.
Be fixed with lampshade 10 or reflector 18 below upright post type radiator 11 in the utility model and the heat transfer plate 8.The inner face of reflector 18 is provided with brilliant brick line and plays the optically focused effect.Be fit to adopt reflector 18 during as shot-light Down lamp or suspension lamp, should select glass or PC lampshade 10 when doing bulb lamp for use
Shape technique in upright post type radiator 11 employing materials 6063 also can come die casting or other technology to be made of one with the good material of thermal conductivity.Heat conduction fin 7 also changes needle-like and and heat transfer plate 8 cast solids into when upright post type radiator 11 adopts extrusion process.