The heat radiation of LED light fixture and heat-proof device
The utility model belongs to the LED lighting technical field, particularly relates to a kind of heat radiation and heat-proof device 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 features 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 is used 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, the very fast generation light decay of meeting, even damage 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 sorrow 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, easy dust stratification dirt in the fin.Hot pipe technique cost height, 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 decay.
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 the LED bulb lamp, and the problem of raising radiating effect, will solve electric insulation and adiabatic problem that driving power is contained in the radiator the inside simultaneously, the utility model provides a kind of heat radiation and heat-proof device of LED light fixture.
The technical scheme that its technical problem that solves the utility model adopts is: comprise LED drive plate, insulation lamp holder, insulation booth, hollow cylinder, hollow radiator and heat transfer plate, when being used for semiconductor lighting, use bolting on the bottom surface of heat transfer plate the LED aluminium base that is fixed with the LED lamp.
Technical characterictic of the present utility model is: segmentation is provided with conducting strip on the outside of hollow cylinder, and arranges in the pair of corresponding mode; On the end of its conducting strip, extend corresponding two groups of fins, and a pair of conducting strip and another is to being provided with fin between the conducting strip; Be insulated not only heat insulation but also electric insulation of box between LED drive plate and the hollow cylinder.
In the adjacent fin parallel arranged of fin of hollow cylinder with other, but and conducting strip and not parallel arrangement; Thermovent has been opened at first position at hollow cylinder.
In addition on the bottom surface of hollow radiator, be fixed with heat transfer plate, and be provided with fin above the heat transfer plate, increase the surface area of heat transfer plate at it.Hollow radiator (6) adopts the shape technique of material 6063, also can come die casting or other technology to be made of one with the good material of thermal conductivity.
Opened thermovent above the so-called insulation lamp holder, the inboard is connected with insulation booth in its lower section, is connected with fairlead in the bottom surface of insulation booth and passes heat transfer plate and LED aluminium base and realize the electric insulation of LED drive plate and heat insulation.
Also have between LED drive plate and the metal screw socket and fill up heat-conducting filler, so that the heat of LED drive plate is by metal screw socket quick heat radiating, simultaneously the electric power connection line of LED drive plate is electrically connected with the LED aluminium base through the internal diameter of fairlead, and the LED aluminium base is sealed by lampshade and prevents dust or steam.Be integral with extrusion process, reduce material cost.
LED light fixture specification kind of light fixture when practical application is a lot, so the outside shape of hollow radiator can be changed, so that the light fixture of different size can be selected suitable shape for use, improves radiating effect.
The beneficial effects of the utility model are, owing to be provided with conducting strip on the outside of hollow cylinder, extend fin on the end of its conducting strip, and a pair of conducting strip and another are exactly the cooling surface areas that increase to having increased fin between the conducting strip more.On the heat of heat transfer plate conducts to a pair of conducting strip and fin rapidly by hollow cylinder, produce convection current through air again, carry out heat exchange, heat is dispersed in the air and reduces the temperature rise of heat transfer plate and LED aluminium base, assurance LED lamp is worked in the temperature range that allows, prevent light decay, prolong the life-span of LED lamp.
Secondly advantage is, with insulation booth and fairlead, LED drive plate and outside heat generating components and conductive metal parts are isolated 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.
LED lamp 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 semi-section structural map of first kind of embodiment of the present utility model.
Fig. 2 is the edge face structure figure of Fig. 1 hollow core radiator.
Fig. 3 is the profile structural map of Fig. 1 hollow core radiator.
Fig. 4 is the semi-section structural map of second kind of embodiment of the present utility model.
1.LED drive plate among the figure, 101. heat-conducting fillers, the lamp holder that 2. insulate, 201. thermovents, 202. the metal screw socket, 3. hollow cylinder, 301. thermovents, 4. insulation booth, 5. fairlead, 6. hollow radiator, 7. fin, 8. heat transfer plate, 801. fin, 9. bolt, 10.LED aluminium base, 11. lampshades, 12. fin, 13. conducting strips, 14. fins, 15. fin, 16. fins, 17. conducting strips.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
The utility model is contained in the radiator the inside 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 is subjected to the warming-up effect and the electric insulation safety problem of electronic devices and components, the utility model provides a kind of heat radiation and heat-proof device of LED light fixture, the heat radiation of this LED light fixture and heat-proof device have been taked the rational structure measure, and electric insulation and adiabatic problem are effectively solved.
By Fig. 1～shown in Figure 4, the utility model comprises LED drive plate 1, insulation lamp holder 2, insulation booth 4, hollow cylinder 3, hollow radiator 6 and heat transfer plate 8, when being used for semiconductor lighting, the LED lamp of on LED aluminium base 10, burn-oning earlier and choosing, coated with thermally conductive silicone grease on the bottom surface of heat transfer plate 8 then, LED aluminium base 10 usefulness bolts 9 are fixed in above the heat-conducting silicone grease,, make the heat of LED aluminium base 10 be convenient to pass to rapidly on the heat transfer plate 8 so that reduce thermal contact resistance.
On the outside of hollow cylinder 3, be distributed with conducting strip 13 and 17 and arrange, on the end of its conducting strip 13, extend fin 7 and 14, on the end of conducting strip 17, also extend 15 and 16 fin in the pair of corresponding mode.Between a pair of conducting strip and another are to conducting strip, add fin 12, promptly increased the cooling surface area of hollow cylinder 3.Fin 12 adjacent fins with other are to arrange and conducting strip 13 and 17 is to arrange in not parallel mode with parallel mode.Adjacent like this fin is identical at interval, and the root of fin 12 is consistent with the interval of peripheral ends, and is different fully with the common mode heronsbill fin arrangement mode on other existing markets, is very beneficial for the heat radiation of fin 12 and can fully carries out heat exchange with surrounding air.The root of common mode heronsbill fin is too close at interval, and surface area is possible increase, but is unfavorable for cross-ventilation.
For handle is rejected in the extraneous air by heat transfer plate 8 heats that give out and in hollow cylinder 3 inside, except the heat conduction of hollow cylinder 3, also thermovent 301 has been opened at half position thereon.So not only get rid of the heat of heat transfer plate 8, also reduced simultaneously to the environment temperature of insulation booth 4 and LED drive plate 1 and the intensification influence of its components and parts.
On the bottom surface of hollow radiator 6, be fixed with heat transfer plate 8, and be provided with fin 801 above the heat transfer plate 8, increase the surface area of heat transfer plate 8 at it.The LED light fixture under given environment temperature to light luminescent lifetime very long, therefore, aerial dust can pass through thermovent 301, enters toward the inside of hollow cylinder 3.So, be provided with fin 801 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 distributed by fin 801, so played the surface area of the additional heat transfer plate 8 that reduces because of the dust that falls.The top both sides fin of heat transfer plate 8 not only can play thermolysis, and more important role is that the tight fit of heat transfer plate 8 and hollow cylinder 3 inwalls is connected, so that reduce thermal contact resistance.
Hollow radiator (6) adopts the shape technique of material 6063, also can come die casting or other technology to be made of one with the good material of thermal conductivity.Fin 801 also changed needle-like and and heat transfer plate 8 cast solids into when hollow radiator 6 adopted extrusion process.
In order to get rid of the heat of LED drive plate 1, on insulation lamp holder 2, opened thermovent 201, the inboard is connected with insulation booth 4 in its lower section, is connected with fairlead 5 in the bottom surface of insulation booth 4 and passes heat transfer plate 8 and LED aluminium base 10 and realize the electric insulation of LED drive plate 1 and metal parts and heat insulation.The fairlead of LED aluminium base 10 is only opened single fairlead 5 during heart position therein, if insulation booth 4 bottom surfaces should be provided with two fairleads 5 of both positive and negative polarity and get final product when the positive and negative lead wires hole of LED aluminium base 10 separately forms two holes.
Fill up heat-conducting filler 101 between LED drive plate 1 and the metal screw socket 202, be for the components and parts heat of LED drive plate 1 by metal screw socket 202 quick heat radiatings, the electric power connection line of LED drive plate 1 is electrically connected with LED aluminium base 10 through the internal diameter of fairlead 5 simultaneously, simultaneously in order to prevent that dust from sealing with heat conductive silica gel in the outside of fairlead 5 and the electric power connection line of internal diameter, also have LED aluminium base 10 also to be sealed and prevent dust or steam by lampshade 11.
The effect of the heat transfer plate 8 among the heat transfer plate 8 in first kind of embodiment of the present utility model and the second kind of embodiment is the same, as depicted in figs. 1 and 2, just peripheral connected mode is also different with the end of hollow radiator 6 just to consider to have adopted different lampshades in the moulding of light fixture.