CN201753879U

CN201753879U - High-power LED road illuminating lamp

Info

Publication number: CN201753879U
Application number: CN2010205027101U
Authority: CN
Inventors: 倪亮; 罗佳
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-24
Filing date: 2010-08-24
Publication date: 2011-03-02
Anticipated expiration: 2020-08-24

Abstract

The utility model relates to an LED street lamp which is composed of a plurality of high-power LEDs. The utility model aims at a defect of low heat radiation efficiency in a heat radiator of prior-art LED street lamp, and discloses the high-power LED road illuminating lamp. The thermal radiating efficiency is increased through improving a fin structure. The optical configuration structure is improved. The light utilization ratio of the lamp is improved. The technical solution is characterized in that: the LED street lamp is composed of a housing and LED light emitting units in parallel; each LED light emitting unit comprises a heat radiator, a reflector, a lampshade and at least two LEDs; the fin of the heat radiator has a thin-wall hollow tubular structure; in each LED light emitting unit, all LEDs are welded on a metal circuit board in a single line; each metal circuit board is welded on a heat sink of a heat radiator; each LED has an independent reflector and is placed at a bottom surface of the reflector; each lampshade is equipped to the top surface of the reflector; all LEDs and reflectors on each metal circuit board share one lampshade.

Description

High-power LED road lighting lamp

Technical field

The utility model relates to light emitting diode (LED) lighting engineering, particularly a kind of road illuminating lamp that is made of some great power LEDs (LED street lamp).

Background technology

Along with the progress of semiconductor technology, single great power LED power surpasses the watt level already, and its commercial product luminous efficiency has reached 80-100lm/W.The light fixture development of LED illumination in recent years is very fast, and various high-power LED lighting fixtures are used more and more general from decorative lighting, road lighting, public place illumination etc.The LED lighting has characteristics such as luminous efficiency height, energy consumption is low, reliability is high, control is convenient.But LED light fixture, particularly high-power LED lamp, caloric value greatly also is its intrinsic shortcoming during work.The high-power LED lamp of prior art all comprises supporting with it radiator, is used to help the LED heat radiation, reduces light decay.The heat spreader structures of prior art as shown in Figure 1, Figure 2, Figure 3 and Figure 4, comprises heat sink 1 and fin 11, and fin 11 is generally solid thin slice.Radiator is generally by aluminium, by cast, extrude, processes moulding such as cutting.Heat sink 1 and fin 11 structures on be an integral body, heat sink 1 skeleton just as radiator, fin 11 is long on skeleton as fishbone.In actual use, the substrate that LED has been installed is fixed on the radiator heat sink 1, and heat sink 1 effect is heat accumulation and heat transfer, and is used to install the LED substrate, and heat radiation is then mainly by fin 11.The LED road illuminating lamp is divided into according to the difference of heat sink arrangements:

The LED street lamp that radiator is exposed particularly is operated in the LED street lamp under the open-air atmosphere, and because of atmospheric falling dust (the particularly a large amount of depositing dusts of dust and sand weather), impurity such as sand and dust are full of the heat-dissipating fin gap; Or icing because of snowfall, cause the heat-dissipating fin root crackle or fracture to occur, cause radiating efficiency low, finally cause the LED light decay to be accelerated.

Built-in, the hermetic LED street lamp of radiator, obviously this class light fixture radiating efficiency is very low.

The LED street lamp that also has built-in electric fan forced heat radiation will additionally increase power consumption, not only run counter to the energy-conservation purport of LED, and the reliability of electric fan determines the reliability of this type of light fixture, in case electric fan lost efficacy, causes the serious light decay of LED very soon.

In addition, the LED street lamp of prior art also exists optical design unreasonable, causes that luminous intensity distribution is undesirable, the low problem of light utilization efficiency (light fixture luminous flux/luminous flux of light source).

As: LED is arranged in same plane, utilizes reflector to carry out the street lamp of luminous intensity distribution.The effective Illumination Distribution scope in the road surface of this type of light fixture is less, forms tangible light and dark road surface radiation response, does not meet the requirement of city illumination relevant criterion.

And for example: LED is arranged in same plane, utilizes secondary lens to carry out luminous intensity distribution.This type of light fixture, the light that LED sends, after seeing through fluorescent material, to could arrive outside by lens, secondary lens and a lampshade, at least have six interfaces in the light path, lens and lampshade gross thickness generally surpass 8mm, and under the combined influence of each interfacial refraction, reflection and material light transmittance, the light utilization efficiency of light fixture is lower.

For another example: LED is arranged on the curved surface, utilizes reflector or secondary lens or reflector and secondary lens to use simultaneously and carries out luminous intensity distribution.This type of lamp distribution is more satisfactory, but exists the light path median surface too much equally, and the transparent material gross thickness is thicker and cause the lower defective of light fixture light utilization efficiency.

The utility model content

Technical problem to be solved in the utility model is exactly at the low shortcoming of prior art LED street lamp heat radiator radiating efficiency, and a kind of high-power LED road lighting lamp is provided, and improves radiating efficiency by improving tab construction.

The utility model also improves the optical arrangement structure of LED street lamp, has improved the light utilization efficiency of light fixture.

The utility model solve the technical problem, and the technical scheme of employing is that high-power LED road lighting lamp is made of side by side shell and 2 LED luminescence units at least; It is characterized in that described LED luminescence unit comprises radiator, reflector, lampshade and at least 2 LED; Described radiator is made of heat sink and fin, described heat sink be strip, described fin is a thin-walled hollow tubulose structure, vertically is arranged in heat sink both sides; In each LED luminescence unit, all LED become single-row being welded on the metallic traces plate, each metallic traces plate is welded on a radiator heat sink, each LED is to there being an independently reflector, LED places the reflector bottom surface, lampshade is installed in the reflector end face, the shared lampshade of all LED and reflector on each metallic traces plate.

Described fin is the special-shaped thin wall hollow pipe.

Described fin is a rectangular thin-wall hollow pipe.

Described fin be welded on heat sink on.

Described cover top portion is provided with the hot-air overfall.

Between each LED luminescence unit ventilation gap is arranged.

Described reflector is a conic reflector, and described conic reflector bottom surface and end face are rectangle, and described bottom surface is vertical with end face with described bottom surface respectively with the end face line of centres.

Each LED luminescence unit has different ray cast angles, and all LED have identical ray cast angle in the same luminescence unit.

Described LED luminescence unit is distributed in the central shaft both sides symmetrically, is positioned at the LED luminescence unit ray cast angle and the central shaft symmetry of central shaft both sides symmetric position.

LED on all LED luminescence units is on same plane or the cambered surface.

The beneficial effects of the utility model are that radiating efficiency height, radiating effect meet the requirement of LED light fixture, can effectively reduce light decay.Be convenient to carry out rational luminous intensity distribution, improve the light fixture light utilization efficiency.

Description of drawings

Fig. 1 is a prior art radiator schematic diagram;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the vertical view of Fig. 1;

Fig. 4 is the enlarged diagram of the partial sectional view of Fig. 1;

Fig. 5 is the light fixture schematic diagram of embodiment;

Fig. 6 is LED, metal circuit board and heat sink assembly relation schematic diagram;

Fig. 7 is the radiator schematic diagram of embodiment;

Fig. 8 is the vertical view of Fig. 7;

Among the figure: 1-is heat sink; The 10-installed surface; The 11-fin; The 20-lampshade; The 21-reflector; 22-LED; The 23-metal circuit board.

The specific embodiment

Below in conjunction with drawings and Examples, describe the technical solution of the utility model in detail.

High-power LED (Light Emitting Diode) road illuminating device of the present utility model, the relation between heat spreader structures, fitting structure, the optical system is handled on comprehensive coordination ground, the characteristics of have the radiating efficiency height, meet the LED thermal characteristics, luminous intensity distribution is reasonable, the light fixture light utilization efficiency is high.

Embodiment

Referring to Fig. 5, this routine high-power LED road lighting lamp is made of shell 3 and 6 LED luminescence units.The LED luminescence unit comprises LED22, radiator, reflector 21 and lampshade 20.Radiator by heat sink 1 and fin 11 constitute, fin 11 is a thin-walled hollow tubulose structure, rectangular thin-wall hollow pipe as shown in Figure 7 and Figure 8.Heat sink 1 is that strip fin 11 vertically is arranged in heat sink 1 both sides, adopts welding procedure and heat sink 1 to link together.For the ease of welding, particularly heat sink 1 and the fin of making for aluminum 11, but its surface can form solder plating by technologies such as plating.Fin 11 can be made the thin-walled hollow tubulose by expressing technique with aluminium.Its section can be a different shape, even can be the curve special pipe, to increase the surface area of fin, improves radiating effect.The hollow tubular fin section that this example adopts is the rectangle (see figure 8), has to be convenient to the advantage of processing and assembling, and its area of dissipation also is twice above than common fin.There is no particular limitation for heat sink 1 planform, as long as be convenient to weld fin 11 and metal circuit board 23 is just passable, the bottom of this example heat sink 1 is provided with the plane 10 of weld metal circuit plate 23, above being convenient to metal circuit board 23 is welded to, as shown in Figure 6.Among Fig. 5, LED places reflector 21 bottom surfaces, and lampshade 20 is installed in reflector 21 end faces.Among Fig. 6, each radiator heat sink 1 on form row by 7 LED22, metal circuit board 23, LED22, reflector 21 and lampshade 20 form hermetically-sealed constructions, can protect LED22, metal circuit board 23 and reflector 22.The corresponding reflector 21 of each LED, this routine reflector 21 adopts positive rectangular pyramid shape reflector, and its end face and bottom surface are square, and end face is vertical with the bottom surface with end face respectively with the bottom center line, and vertical with installed surface 10.The reflector of this structure can make light distribution more even, than using secondary lens to have higher light utilization efficiency.Select the different taperings of reflector 21, can adjust, form once light-distribution LED light.From Fig. 5, Fig. 7 as can be seen,, can carry out secondary light-distribution, make it to satisfy lighting requirement the LED light fixture by selecting the angle of inclination of installed surface 10.This routine LED luminescence unit is distributed in central shaft OP both sides symmetrically, be positioned at the LED luminescence unit ray cast angle and the central shaft symmetry of central shaft both sides symmetric position, each LED luminescence unit can have different ray cast angles or have identical throw light angle.In this example, the LED on all LED luminescence units is on the same cambered surface, as shown in Figure 5.The LED that distributes along cambered surface can provide wideer illumination zone.

This routine high-power LED lighting fixture shell mechanism as can be seen from Figure 5, its top is made up of three (can certainly be more than three) top boards 30 of interlaced arrangement, slit between each top board 30 constitutes the hot-air overfall of cover top portion.This particular structure, both can prevent that big impurity from entering light fixture (even the less sand and dust of particle diameter enter light fixture, also can spill) from the radiator slit, can prevent that also a large amount of snowflakes etc. from entering light fixture, avoid the icing heat spreader structures that destroys of accumulated snow in the light fixture, can provide passage for hot-air in the light fixture overflows again.Do not influence the ventilation and heat of light fixture.In order to improve radiating effect, also has ventilation gap between each LED luminescence unit.During work, density diminished after the air of thin-walled tubulose fin 11 inside was heated, and rose automatically and overflowed the mouth of pipe, and the cold air of suction fin lower end enters in the pipe and replenishes, shown in arrow among Fig. 5.Therefore, compare this routine radiator with other radiators and have higher radiating efficiency.Special tab construction of the present utility model, the fin longitudinal axis is vertical substantially with ground when requiring to install, and promptly the fin longitudinal axis and ground perpendicular angle are between 0～15 °, had better not be above 20 °, this angle is more little, and is strong more to the suction effect of cold air, and radiating effect is good more.

The utility model can be according to the watt level of LED and the power requirement of whole lighting, the quantity of LED in the quantity of selection LED luminescence unit and each the LED luminescence unit, combination obtains the lighting of various power, and power configuration is very flexible, can satisfy various lighting demands.

Claims

1. high-power LED road lighting lamp is made of side by side shell and 2 LED luminescence units at least; It is characterized in that described LED luminescence unit comprises radiator, reflector, lampshade and at least 2 LED; Described radiator is made of heat sink and fin, described heat sink be strip, described fin is a thin-walled hollow tubulose structure, vertically is arranged in heat sink both sides; In each LED luminescence unit, all LED become single-row being welded on the metallic traces plate, each metallic traces plate is welded on a radiator heat sink, each LED is to there being an independently reflector, LED places the reflector bottom surface, lampshade is installed in the reflector end face, the shared lampshade of all LED and reflector on each metallic traces plate.

2. high-power LED road lighting lamp according to claim 1 is characterized in that, described fin is the special-shaped thin wall hollow pipe.

3. high-power LED road lighting lamp according to claim 2 is characterized in that, described fin is a rectangular thin-wall hollow pipe.

4. high-power LED road lighting lamp according to claim 1 is characterized in that, described fin be welded on heat sink on.

5. high-power LED road lighting lamp according to claim 1 is characterized in that described cover top portion is provided with the hot-air overfall.

6. high-power LED road lighting lamp according to claim 1 is characterized in that, between each LED luminescence unit ventilation gap is arranged.

7. high-power LED road lighting lamp according to claim 1 is characterized in that, described reflector is a conic reflector, and described conic reflector bottom surface and end face are rectangle, and described bottom surface is vertical with end face with described bottom surface respectively with the end face line of centres.

8. according to any described high-power LED road lighting lamp of claim 1～7, it is characterized in that each LED luminescence unit has different ray cast angles, all LED have identical ray cast angle in the same luminescence unit.

9. high-power LED road lighting lamp according to claim 8 is characterized in that, described LED luminescence unit is distributed in the central shaft both sides symmetrically, is positioned at the LED luminescence unit ray cast angle and the central shaft symmetry of central shaft both sides symmetric position.

10. high-power LED road lighting lamp according to claim 9 is characterized in that, the LED on all LED luminescence units is on same plane or the cambered surface.