CN102102868B - Large-power light emitting diode (LED) active radiating device for car lamp - Google Patents
Large-power light emitting diode (LED) active radiating device for car lamp Download PDFInfo
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- CN102102868B CN102102868B CN2010105559038A CN201010555903A CN102102868B CN 102102868 B CN102102868 B CN 102102868B CN 2010105559038 A CN2010105559038 A CN 2010105559038A CN 201010555903 A CN201010555903 A CN 201010555903A CN 102102868 B CN102102868 B CN 102102868B
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Abstract
The invention provides a large-power light emitting diode (LED) active radiating device for a car lamp. The large-power LED active radiating device is characterized in that a heat plate is tightly adhered to the end surface of a cold source for a semiconductor refrigerating plate; a large-power LED is arranged at the top of the heat plate; the upper end surface of a radiator is tightly adhered to the end surface of a heat source for the semiconductor refrigerating plate; the bottom of the radiator is connected with a fan, the heat plate and the semiconductor refrigerating plate are arranged on an installing seat, and a cover plate arranged on the installing seat covers the exposed part of the heat plate; the output end of a heat dissipation temperature sensor arranged on the radiator, the output end of a heat conduction temperature sensor arranged on the heat plate and the output ends of environment temperature sensors arranged inside and outside a lamp are respectively connected to the input end of a micro-processing controller; and the refrigerating power supply control end of the micro-processing controller is connected with the power supply of the semiconductor refrigerating plate, and a fan motor control end is connected with the power supply for a fan motor, and a light source driving end is connected with the power end of the large-power LED. The large-power LED active radiating device has the advantage that active heat dissipation is adopted, so that the operating temperature of the LED is stabilized and controlled below the environment temperature.
Description
Technical field
The present invention relates to a kind of car light with the active heat radiating device of great power LED, belong to automobile lighting light fixture heat dissipation technology field.
Background technology
Great power LED is widely used in car light has become a kind of trend.In the headlamp of car light, has incomparable advantage, the characteristics such as it has long service life, and reflecting time is short, and luminous efficiency is high, and caloric value is low.
LED belongs to the luminous cold light source of semi-conducting material, be subjected to the restriction of present technology, it still will produce certain heat in the course of the work, if this part heat can not distribute timely, the decline of semiconductor material luminous efficiency can be directly caused, led light source can be burnt when serious; This situation is especially outstanding in great power LED.The serviceability temperature of the great power LED that uses at present is no more than 120 ℃ usually, and its junction temperature is no more than 150 ℃; Only can reach about 75% under 25 ℃ of conditions in the luminous efficiency under 120 ℃ of conditions, more energy has been converted to heat energy, rather than luminous energy, further increases the weight of the burden of radiator.Will cause the rising of led light source junction temperature when radiator can not well distribute heat, until burn led chip, therefore will consider to increase larger surplus when the design radiator, this has just increased cost and the weight of radiator.
At present car light heat radiation is commonly used to be to adopt heat pipe heat radiation and radiator combination to dispel the heat and by modes such as water-coolings, all are heat radiations of passive type, because radiating effect is subjected to the impact of environment temperature larger, led light source can only be operated in the above work of environment temperature, have a strong impact on the one hand service life and the luminous efficiency of LED, there is fluctuation in the illuminating effect of car light simultaneously, along with the passing of lighting time, light will subtract secretly gradually, and affect traffic safety.
The luminescence mechanism of Halogen lamp LED and HID lamp is different from led light source, and the temperature of its luminous point can reach thousands of degrees centigrade, and the variation of environment temperature is very little on the impact of its luminous efficiency, can ignore fully.Adopt the illuminating effect of the light fixture of these light sources can not be subject to the impact of environment temperature.Therefore substitute conventional light source by led light source, important one that is applied in the headlamp field can make the luminous efficiency of led light source stable exactly,
Summary of the invention
The object of the present invention is to provide a kind of energy active heat removal, make the operating temperature of LED be stabilized in the active heat radiating device that the car light that is controlled at below the environment temperature is used great power LED.
The present invention is that the technical scheme that achieves the above object is: a kind of car light active heat radiating device of great power LED, it is characterized in that: comprise great power LED, heat-conducting plate, semiconductor chilling plate and radiator with unidirectional heat sinking function, fan and microprocessor controller, described heat-conducting plate fits tightly the low-temperature receiver end face at semiconductor chilling plate, great power LED is installed in the top of heat-conducting plate, the upper surface of radiator fits tightly the thermal source end face at semiconductor chilling plate, the bottom of radiator is connected with fan, heat-conducting plate and semiconductor chilling plate are installed on the mount pad, be installed in plate cover on the mount pad in the part that leaks outside of heat-conducting plate, be installed in the exothermic temperature sensor on the radiator and be installed in the heat conduction temperature sensor on the heat-conducting plate and be installed in the lamp body or the input of each output access microprocessor controller of the environment temperature sensor that lamp body is outer, the semiconductor refrigerating power control terminal of microprocessor controller is connected with the power supply of semiconductor chilling plate, the control of Fan Motor end is connected with the power supply of fan electromotor, the light source drive end is connected with the power end of great power LED.
Wherein: described institute mount pad is provided with pilot hole, radiator is connected with mount pad, interior its thermal source end face of pilot hole that semiconductor chilling plate is installed in mount pad is connected with radiator by heat conductive silica gel, heat-conducting plate is installed in the pilot hole of mount pad and by heat conductive silica gel and is connected with semiconductor chilling plate low-temperature receiver end face, the axle journal on heat-conducting plate top stretches out the end face of mount pad, cover plate with installing hole is installed in the end face of mount pad, and fit with the composition surface of heat-conducting plate in the cover plate bottom, the axle journal peripheric surface of the installing hole on the cover plate and heat-conducting plate is fitted.
The present invention fits tightly the low-temperature receiver end face of great power LED by heat-conducting plate and semiconductor chilling plate, and thermal source end face and the radiator of semiconductor chilling plate fit tightly, because semiconductor chilling plate has unidirectional heat sinking function, semiconductor chilling plate arrives the thermal source end face with the transfer of heat of low-temperature receiver end face under the effect of electric energy, therefore the heat that great power LED produces all can be transferred to the thermal source end face by the low-temperature receiver end face from semiconductor chilling plate, then by radiator with dissipation of heat, because heat is concentrated on the radiator, therefore make the heat of spreader surface far above heat-conducting plate temperature and environment temperature, thereby changed traditional radiator structure, temperature when making great power LED work of the present invention is far below environment temperature, and be stabilized in the predefined scope, therefore can make the great power LED junction temperature can keep constant, the luminous efficiency of LED is stable, effectively reduce the problem of the luminous efficiency reduction that causes because of the junction temperature rising, improve the utilization rate of electric energy, reduce the generation of heat.The semiconductor chilling plate that the present invention adopts has unidirectional heat sinking function, again under the buffer action of cover plate and mount pad, can effectively stop the variation of environment temperature on the impact of great power LED, simultaneously semiconductor chilling plate have noiseless, friction, do not need cold-producing medium, the characteristics such as volume is little, lightweight, reliable operation, be easy to the adjusting of cold.The present invention is at radiator, heat-conducting plate and lamp body inside or outside are equipped with temperature sensor, in time detect the temperature at radiator place by each temperature sensor, the environment temperature that the temperature at heat-conducting plate place and lamp body are inside and outside, each temperature signal is inputed in the microprocessor controller, compare and calculate rear output control signal by predefined program in the microprocessor controller, provide the refrigeration power supply to semiconductor chilling plate respectively, refrigerating capacity with the control semiconductor chilling plate, the energy waste of avoiding excessive refrigeration to cause, control simultaneously the rotating speed of fan, provide sufficient air-flow to radiator, and drive great power LED work.The present invention can prevent that by cover plate semiconductor chilling plate from absorbing heat that great power LED produces heat in addition, to improve the efficient of semiconductor chilling plate.
Description of drawings
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is the structural representation that car light of the present invention is used the active heat radiating device of great power LED.
Fig. 2 is the A-A sectional structure schematic diagram of Fig. 1.
Fig. 3 is electrical equipment control theory diagram of the present invention.
Wherein: 1-great power LED, 2-heat-conducting plate, 3-cover plate, 31-installing hole, 4-mount pad, 41-pilot hole, 5-semiconductor chilling plate, 6-radiator, 7-fan.
The specific embodiment
See shown in Fig. 1,2, car light of the present invention is with the active heat radiating device of great power LED, comprises great power LED 1, heat-conducting plate 2, has semiconductor chilling plate 5 and radiator 6, fan 7 and the microprocessor controller of unidirectional heat sinking function.The power of great power LED 1 of the present invention can adopt 12-21 watt, the maximum cooling capacity of semiconductor chilling plate 5 is 60W, heat-conducting plate 2 can adopt copper plate, heat-conducting plate 2 fits tightly the low-temperature receiver end face at semiconductor chilling plate 5, great power LED 1 is installed in the top of heat-conducting plate 2, and the upper surface of radiator 6 fits tightly the thermal source end face at semiconductor chilling plate 5, the bottom of radiator 6 is connected with fan 7, this radiator 6 can adopt the radiator of aluminium matter, provide mobile air by fan 7 for radiator 6, heat-conducting plate 2 is installed on the mount pad 4, is installed in the part that leaks outside that cover plate 3 on the mount pad 4 covers on heat-conducting plate 2, for heat-conducting plate 2 provides buffer action.See Fig. 1, shown in 2, mount pad 4 of the present invention is provided with pilot hole 41, the end face of radiator 6 is connected with mount pad 4, can adopt clamping or bonding form, and semiconductor chilling plate 5 is installed in the pilot hole 41 of mount pad 4, the thermal source end face of semiconductor chilling plate 5 is connected with radiator 6 by heat conductive silica gel, heat-conducting plate 2 also is installed in the pilot hole 41 of mount pad 4 and by heat conductive silica gel and is connected with the low-temperature receiver end face of semiconductor chilling plate 5, the axle journal on heat-conducting plate 2 tops stretches out the end face of mount pad 4, cover plate 3 with installing hole 31 is installed in the end face of mount pad 4, and fit in the composition surface of cover plate 3 bottoms and heat-conducting plate 2, installing hole 31 on the cover plate 3 is fitted with the axle journal peripheric surface of heat-conducting plate 2, the net quantity of heat that great power LED 1 is produced by semiconductor chilling plate 5 is the transmission by its internal crystal framework constantly, heat is moved to the thermal source end face to be distributed by radiator 6 again, the dissipation of heat that the thermal source end face is higher than great power LED 1 falls, to reduce as early as possible hot-side temperature to increase the two ends temperature difference, improve refrigeration, the maximum heat radiation power of fan 7 of the present invention and radiator 6 is more than the 90W.
On the radiator 6 of the present invention the exothermic temperature sensor is installed, to detect the temperature on the radiator 6, this exothermic temperature sensor can be installed in radiator 6 surfaces, and the heat conduction temperature sensor is installed on the heat-conducting plate 2, to detect the temperature on the heat-conducting plate 2, this heat conduction temperature sensor can be installed in the top of heat-conducting plate 2, and lamp body inside or outside are equipped with environment temperature sensor, with the testing environment temperature, the exothermic temperature sensor, the input of each output access microprocessor controller of heat conduction temperature sensor and environment temperature sensor, microprocessor controller of the present invention can adopt existing CPU processor, or MCU processor, program by the microprocessor controller inner setting, each temperature sensor signal to input compares and calculates each control signal of rear output, the semiconductor refrigerating power control terminal of this microprocessor controller is connected with the power supply of semiconductor chilling plate 5, control its refrigerating capacity, and the energy waste of effectively avoiding excessive refrigeration to cause by regulating refrigerating capacity, the control of Fan Motor end of microprocessor controller is connected with the power supply of fan electromotor, rotating speed with control fan 7, sufficient air-flow is provided for radiator 6, by environment temperature and exothermic temperature, make the rotating speed of the control of Fan Motor end change fan electromotor of microprocessor controller, the light source drive end of microprocessor controller is connected with the power supply of great power LED 1, driving power is provided for great power LED 1, behind the microprocessor controller plugged, active heat radiating device of the present invention just can be worked.
When the refrigerating capacity of 5 pairs of great power LEDs 1 of semiconductor chilling plate of the present invention is 60 watt-hours, can adjust as required, corresponding 21 watts great power LED 1 has 3 times surplus nearly, the cooling system that radiator 6 and fan 7 consist of can provide 90 watts heat dissipation capacity, therefore semiconductor chilling plate 5 is had 50% rich heat dissipation capacity.
Of the present invention when active heat radiating device uses, can with active heat radiating device all install to lamp body inside; Also radiator 6 and fan 7 can be installed to the outside of lamp body, take mount pad 4 as interface.
When little processing processor plugged, driving power is provided for great power LED 1, great power LED 1 is lighted, heat-conducting plate 2 contacts with great power LED 1 surface, the heat of great power LED 1 is imported on the heat-conducting plate 2, heat-conducting plate 2 is delivered to rapidly the thermal source end face with heat by the low-temperature receiver end face of semiconductor chilling plate 5 again, make low-temperature receiver end face and thermal source end face the larger temperature difference occur, heat is just constantly by the lattice transmission in the semiconductor chilling plate 5, heat is moved to thermal source end face and logical radiator 6 and fan 7 will be distributed, simultaneously by the heat conduction temperature sensor is arranged, exothermic temperature sensor and environment temperature sensor constantly input to temperature signal everywhere in the microprocessor controller, contrast by microprocessor controller, calculate, semiconductor refrigerating power control signal and the control of Fan Motor signal of respectively output correspondence, control respectively the refrigerating capacity of semiconductor chilling plate 5 and the rotating speed of control fan electromotor, to great power LED 1 forced heat radiation, the operating temperature of great power LED 1 is stabilized in 25 ℃.
Claims (1)
1. a car light is with the active heat radiating device of great power LED, it is characterized in that: comprise great power LED (1), heat-conducting plate (2), semiconductor chilling plate (5) and radiator (6) with unidirectional heat sinking function, fan (7) and microprocessor controller, described heat-conducting plate (2) fits tightly the low-temperature receiver end face at semiconductor chilling plate (5), great power LED (1) is installed in the top of heat-conducting plate (2), the upper surface of radiator (6) fits tightly the thermal source end face at semiconductor chilling plate (5), the bottom of radiator (6) is connected with fan (7), heat-conducting plate (2) and semiconductor chilling plate (5) are installed on the mount pad (4), be installed in the part that leaks outside that cover plate (3) on the mount pad (4) covers on heat-conducting plate (2), described mount pad (4) is provided with pilot hole (41), radiator (6) is connected with mount pad (4), interior its thermal source end face of pilot hole (41) that semiconductor chilling plate (5) is installed in mount pad (4) is connected with radiator (6) by heat conductive silica gel, heat-conducting plate (2) is installed in the pilot hole (41) of mount pad (4) and by heat conductive silica gel and is connected with semiconductor chilling plate (5) low-temperature receiver end face, the axle journal on heat-conducting plate (2) top stretches out the end face of mount pad (4), cover plate (3) with installing hole (31) is installed in the end face of mount pad (4), and fit with the composition surface of heat-conducting plate (2) in cover plate (3) bottom, installing hole (31) on the cover plate (3) is fitted with the axle journal peripheric surface of heat-conducting plate (2), be installed in the exothermic temperature sensor on the radiator (6) and be installed in the heat conduction temperature sensor on the heat-conducting plate (2) and be installed in the lamp body or the input of each output access microprocessor controller of the environment temperature sensor that lamp body is outer, the semiconductor refrigerating power control terminal of microprocessor controller is connected with the power supply of semiconductor chilling plate (5), the control of Fan Motor end is connected with the power supply of fan electromotor, the light source drive end is connected with the power supply of great power LED (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105559038A CN102102868B (en) | 2010-11-18 | 2010-11-18 | Large-power light emitting diode (LED) active radiating device for car lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105559038A CN102102868B (en) | 2010-11-18 | 2010-11-18 | Large-power light emitting diode (LED) active radiating device for car lamp |
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| CN102102868A CN102102868A (en) | 2011-06-22 |
| CN102102868B true CN102102868B (en) | 2013-03-06 |
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| CN2010105559038A Active CN102102868B (en) | 2010-11-18 | 2010-11-18 | Large-power light emitting diode (LED) active radiating device for car lamp |
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| CN102325404B (en) * | 2011-08-23 | 2014-07-02 | 上海交通大学 | Temperature-controllable high-power light-emitting diode (LED) lighting system |
| CN102944001B (en) * | 2012-11-08 | 2014-06-04 | 南京理工大学 | Heat radiating device of high-power LED (Light-emitting diode) car lamp |
| JP6145918B2 (en) * | 2013-02-13 | 2017-06-14 | パナソニックＩｐマネジメント株式会社 | Lighting device and lighting fixture using the same |
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| CN107883343A (en) * | 2017-09-20 | 2018-04-06 | 东莞市欧科光电科技有限公司 | A kind of LED automobile headlamp temperature-control ice cold heat sink |
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| CN109027958A (en) * | 2018-07-04 | 2018-12-18 | 河海大学常州校区 | A kind of radiator for matrix LED car light |
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| US11339945B2 (en) * | 2019-07-30 | 2022-05-24 | Xin Dong | Apparatus and methods for vehicle lamp ventilation and temperature control |
| CN110803105B (en) * | 2019-11-15 | 2021-06-01 | 北京海纳川汽车部件股份有限公司 | Control method and device for automobile lamp and automobile |
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