CN201666560U

CN201666560U - LED streetlamp radiator

Info

Publication number: CN201666560U
Application number: CN2009202778144U
Authority: CN
Inventors: 刘建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-25
Filing date: 2009-11-25
Publication date: 2010-12-08
Anticipated expiration: 2019-11-25

Abstract

The utility model provides an LED streetlamp radiator, comprising a lamp shell (4) and a plurality of radiating fins (5) arranged on the external surface of the lamp shell (4), wherein the fin root of each radiating fin is provided with an opening (5-1); and the bottom part of the opening (5-1) is restricted by the external surface of the lamp shell (4). Furthermore, the external surface of the lamp shell can be a convex surface with streamline shape; and a plurality of radiating fins are arranged in parallel and vertically arranged relative to the external surface. By combining the external surface of the lamp shell with the shape of convex surface with the opening of the radiating fin, on the one hand, the air, rainwater and the like can flow easily by the opening, thus improving the radiating performance; on the other hand, the air, rainwater and the like flowing by the opening can easily bring away the dust falling on the external surface of the lamp shell so as to protect the mud and heat from being collected among the radiating fins, thus being beneficial to prolonging the service life of the LED streetlamp.

Description

The LED street lamp heat radiator

Technical field

The utility model relates to a kind of LED street lamp heat radiator.

Background technology

The LED street lamp is a kind of product form of semiconductor lighting, and it had obtained the support of extensive concern both domestic and external, particularly government in recent years with energy-saving and environmental protection and long-life advantage.The LED street lamp has good market potential, just moves towards the practical stage by experiment and trial period at present.As the application product of LED, the designing technique of LED street lamp is mainly reflected in radiating treatment, reasonable luminous intensity distribution, constant current driving and four aspects of structural design, and heat radiation is particularly crucial, because it directly determines the service life of great power LED and light fixture thereof.

Heat radiation has two kinds of methods usually: active heat removal and passive heat radiation.Active heat removal generally is to use equipment such as fan by force heat to be exported, passive heat radiation then is the process of by circulation of air the body surface heat being taken away naturally by heat sink material, the used radiator of the latter mostly is a plurality of sheet metals, metal tube or the metallic plate etc. of good heat dispersion performance, heat-conducting medium common metal body, heat-conducting glue or heat pipe etc.

The LED street lamp is owing to its low-power consumption, long-life design object, and the objective reality that product is little, consumption is big, has determined it to be not suitable for basically adopting the active heat removal mode, and has more trended towards adopting the passive radiating mode of radiator.

The LED road lamp cooling is handled and is comprised heat conduction and two parts of heat radiation.Heat conduction is meant from heat sink (metal substrate) of pyrotoxin great power LED and waits heat-conducting medium directly or pass through and heat is reached the process of radiator after compound by heat pipe or the metal substrate (aluminum base PCB plate commonly used) that scribbles heat-conducting glue, this is crossed range request and reduces the link as far as possible, the heat-conducting medium that chooses avoids heat to lose.Heat radiation then is to pass to air by the radiator heat that it is collecting and distributing, and this process then wishes to increase as far as possible the contact-making surface of radiator and air, and keeps air unimpeded.

At present, the heat dissipating method of relevant LED street lamp has occurred much.With respect to regard to the residing environment of lamp housing, can be divided into built-in (radiator is in lamp housing) and external (radiator is outside lamp housing) two classes with regard to radiator.From the independence of radiator, integral type and split type two kinds of structures are arranged again with respect to lamp housing.Integral structure is meant that radiator itself is exactly a part of lamp housing, and split type radiator and the lamp housing of then being meant is two separate parts.

For the structure kind of LED street lamp, then can be divided into fin radiator, panel radiator, column radiator and other modes with radiator.

With respect to other kinds, external integral type fin radiator is most popular a kind of because it have simply, clear superiority such as practicality and high efficiency and heat radiation.

So-called external integral type fin radiator is meant and directly utilizes the LED streetlamp housing as substrate, constitutes the cooling system of an opening with the fin of its outer surface.Such structure decrease the overall weight of light fixture, increased as the heat sink substrate area of radiator and total area of dissipation, meet very much the products characteristics of LED street lamp, have and integrate heat conduction and the excellent heat dispersion performance that dispels the heat.

Yet because the LED street lamp is in outdoor high-altitude, long-term wind and weather Exposure to Sunlight meeting makes the radiator bottom occur laying dust and deposition phenomenon easily, and intensive relatively radiating fin self can hinder the radiator inner ventilation, causes long-pending heat too much to influence radiating effect.These phenomenons all have in various degree performance to all LED street lamp heat radiators basically, and external integral type fin radiator is no exception.

For described long-pending heat, laying dust and deposition phenomenon, though also do not obtain the enough attention in the industry at present, relevant product design, technology investigation and patent application are also seldom, but it is the key factor that influences LED road lamp cooling effect and life of product, this technology starting point of the present utility model just and the content that will solve.

The utility model content

The purpose of this utility model provides a kind of LED street lamp heat radiator, and it can effectively solve long-pending heat, laying dust and the deposition phenomenon of radiator.

To achieve these goals, the utility model provides a kind of LED street lamp heat radiator, this LED street lamp heat radiator comprises lamp housing and a plurality of radiating fins that are formed on the lamp housing outer surface, wherein be formed with opening, make the bottom of this opening limit by the outer surface of lamp housing in the wing root position of each radiating fin.

By the opening that forms on the radiating fin, air, rainwater etc. are easy to circulate by opening, thereby effectively improved heat dispersion, in addition, air by opening circulation, rainwater etc. can also be taken away the dust that drops on the lamp housing outer surface at an easy rate, thereby avoid between radiating fin, producing collection mud, thermal-arrest, help prolonging the service life of LED street lamp.

The outer surface of described lamp housing preferably has fusiform convex shape, described a plurality of radiating fin is parallel to each other and is arranged vertically with respect to described outer surface, thereby the air by opening circulation, rainwater etc. are more prone to take away dropping on dust on the lamp housing outer surface, mud etc.Simultaneously, because radiating fin is parallel to each other and is arranged vertically with respect to outer surface, therefore help the circulation of air between the radiating fin, thereby improved radiating effect.

Preferably, each radiating fin can have a plurality of openings.By increasing number of openings, can increase trafficability characteristics such as air, rainwater, improve heat dispersion, avoid between radiating fin, producing collection mud.

Preferably, the edge of the opening on the radiating fin is preferably formed and is more preferably to form circular arc by arc, thereby can avoid producing the dead angle at opening part, prevents to accumulate therein mud.

Preferably, the opening on the different radiating fins can be aimed at mutually, to form the passage perpendicular to each radiating fin.In this way, on the one hand because radiating fin is arranged in parallel, so on the length direction of radiating fin, formed a series of ventilations and water stream channel, aim at mutually to form passage because of opening on the other hand perpendicular to each radiating fin, so formed a series of ventilations and water stream channel equally in (promptly on the direction perpendicular to radiating fin) on the width of radiating fin, therefore can further improve heat dispersion, and because air and rainwater etc. are easy to by these passages, so can avoid very effectively on the outer surface of lamp housing, between radiating fin, form collection mud phenomenon, thus the radiating effect and the service life of having improved the LED street lamp.

Of particular note, above-mentioned technical characterictic of the present utility model can use separately, also can be by being combined into enforcement usefulness arbitrarily, and one in these technical characterictics or many persons also can be used in combination with other features that this paper does not mention.

Description of drawings

Fig. 1 is the schematic side elevation according to the LED street lamp of a kind of preferred implementation of the present utility model;

Fig. 2 is the upward view of LED street lamp among Fig. 1;

Fig. 3 is the left view of the part of LED street lamp among Fig. 1.

The specific embodiment

Below with reference to accompanying drawings, by specific embodiment the utility model is elaborated.

As shown in the figure, according to a kind of embodiment of the present utility model, provide a kind of LED street lamp heat radiator, it mainly comprises lamp housing 4 and is formed at a plurality of radiating fins 5 on lamp housing 4 outer surfaces.Wing root position at each radiating fin 5 is formed with opening 5-1, makes the bottom of this opening 5-1 be limited by the outer surface of lamp housing 4.

Usually, as shown in Figure 1, the top of radiating fin 5 (upper end) can be referred to as the apex of the wing, and bottom (lower end) can be referred to as the wing root.That is to say, as shown in Figure 1, formed opening 5-1 is the opening of downward bridge opening shape of opening wide on the radiating fin 5, the bottom of this opening 5-1 is directly limited by the outer surface of lamp housing 4, thereby air and rainwater can be by the outer surface circulation of this opening along lamp housing, so that the dust on the lamp housing outer surface, mud etc. are washed away.

The upper surface of streetlamp housing 4 also preferably has fusiform convex shape.By this structure, on the one hand, air, rainwater etc. are easy to circulate by opening, thereby improved heat dispersion, on the other hand, air by the circulation of this opening, rainwater etc. can be taken away the dust that drops on the lamp housing outer surface at an easy rate, avoid producing between radiating fin collection mud, thermal-arrest, help prolonging the service life of LED street lamp.

Generally, the upper surface of streetlamp housing 4 so that rainwater etc. can wash the upper surface of lamp housing 4, avoids producing collection mud phenomenon vertically upward between lamp housing upper surface, radiating fin.According to specific needs, streetlamp housing 4 is being obliquely installed, and the utility model does not limit this.

On the upper surface of streetlamp housing, usually radiating fin as much as possible should be set, to increase radiating effect.But along with the increase of radiating fin quantity, radiating fin gap each other reduces, thereby produces collection mud phenomenon easily among these gaps, and air is not easy to circulate between these narrow and small gaps, influences its heat dispersion.By making the lamp housing upper surface of radiating fin perpendicular to convex shape, the gap between the radiating fin will enlarge along with the increase of its height, thereby can address the above problem to a certain extent.

In addition,, can carry out surface treatment, make it smooth as much as possible upper surface in order to avoid on the lamp housing upper surface, producing collection mud phenomenon as far as possible.

In addition, radiating fin is normally integrally formed with lamp housing.Produce collection mud for fear of the joint at radiating fin and lamp housing, the joint of radiating fin and lamp housing is preferably and seamlessly transits, and for example realizes by knuckle.

In order to improve the performance of passing through of heat dispersion and air, rainwater etc., each radiating fin 5 can have a plurality of opening 5-1, for example is 6 opening 5-1 shown in Fig. 1.By increasing number of openings, can increase trafficability characteristics such as air, rainwater, improve heat dispersion, avoid between radiating fin, producing collection mud.In addition, the size of opening can be carried out appropriate design according to the size of lamp housing.

Opening 5-1 can have different shape, but for fear of produce the dead angle at opening 5-1 place, opening preferably has the edge of arc, more preferably has the edge of circular arc, thereby mud can not accumulate in opening.The edge of opening described here as shown in Figure 1, is meant the edge that is formed at the opening on the radiating fin 5, limits because the bottom of opening (downside) is outer surface 4-1 by lamp housing 4.That is to say that opening 5-1 forms the shape of arch bridge opening on the whole.

Preferably, the opening 5-1 on the different radiating fins 5 can aim at mutually, to form the passage perpendicular to each radiating fin 5.In this way, on the one hand because radiating fin 5 is arranged in parallel, thus on the length direction of radiating fin 5, formed a series of ventilations and water stream channel, promptly shown in the direction that is approximately perpendicular to paper among the left and right directions among Fig. 1 and Fig. 3.On the other hand, because the opening 5-1 on the different radiating fins 5 aims at mutually to form the passage (promptly being approximately perpendicular to the paper direction among Fig. 1) perpendicular to each radiating fin 5, so formed a series of ventilation and water stream channel equally in (promptly on the direction perpendicular to radiating fin 5) on the width of radiating fin 5, therefore can further improve heat dispersion, and because air and rainwater etc. are easy to by these passages, so can avoid between the radiating fin 5 on the outer surface 4-1 of lamp housing 4, forming collection mud phenomenon very effectively, thereby the radiating effect and the service life of having improved the LED street lamp.

Adopt the LED street lamp of radiator of the present utility model, comprise circuit board (perhaps pcb board) 1 that is installed in the lamp housing 4 and the LED 1-1 that is installed on the circuit board 1.In addition, the lower surface at described lamp housing 4 preferably is equipped with transparent lamp shade 7, these transparent lamp shade 7 ejaculations of the light transmission that described LED 1-1 sends.The drive circuit of promising described LED 1-1 power supply is installed in described lamp housing, and the power supply hatchcover is installed to hide described drive circuit at the lower surface of described lamp housing.In addition, an end of described lamp housing can have socket 4-4.Electric wire can be linked in the LED streetlamp housing by this socket, and power supply is offered drive circuit 8.And, can pass through this socket, the LED street lamp is installed on the lamp stand.Drive circuit 8 can convert civil power in direct current and make it luminous with driving LED.

In order to improve the integral heat sink effect of LED street lamp, circuit board 1 preferably is installed in the described lamp housing 4 by heat-conducting glue 3, promptly is attached at the inboard of lamp housing upper surface.Therefore, the heat that LED produces can be delivered to circuit board 1 by heat sink by it (fin) 1-1-1, is delivered to lamp housing 4 by heat-conducting glue 3 then, and last heat can be dispersed in the space outerpace by the outer surface of lamp housing 4 and a large amount of radiating fins 5.

According to LED street lamp of the present utility model,, can provide the reflector pond of forming by a plurality of reflectors 2 for it in order to improve the lighting effect of LED 1-1.

As shown in Figure 2, in streetlamp housing 4, can luminous cabin 4-2 be set in a side, opposite side is provided with powerhouse dome 4-3.LED 1-1 and circuit board 1-2 are arranged in the luminous cabin 4-2, and transparent lamp shade 7 covers on luminous cabin 4-2.8 of drive circuits are arranged in the powerhouse dome 4-3, and 6 of power supply hatchcovers cover powerhouse dome 4-3.

According to the utility model, lamp housing 4 and preferred and lamp housing 4 integrally formed radiating fins 5 can be selected the aluminium alloy (as AL6063, AL1100 etc.) of good heat dispersion performance for use.

Radiating fin 5 is normally arranged along the upper surface 4-1 parallel longitudinal of lamp housing 4, and is taken the outer surface 4-1 of lamp housing as much as possible.The thickness of radiating fin 5 should approach (for example, the apex of the wing thick about 1.5 is to 3mm) as much as possible, and the height of radiating fin 5 is (for example about 4 to 7cm) suitably.The height of opening 5-1 on the radiating fin 5 should be selected according to the size of lamp housing 4 and radiating fin 5, for example can be that 1/3 of radiating fin height is arrived between half.The spacing of radiating fin 5 can be close with the height of opening 5-1.The width of opening 5-1 can be its height 1.5 to 2.5 times between.The interval of opening 5-1 can be between 1 to 2 times of its width.The selection of above-mentioned these parameters is not determinate, and concrete parameter is selected and can be designed according to the actual needs.

Claims

1. LED street lamp heat radiator, this radiator comprise lamp housing (4) and are formed at a plurality of radiating fins (5) on lamp housing (4) outer surface, it is characterized in that:

Wing root position at each radiating fin (5) is formed with opening (5-1), makes the bottom of this opening (5-1) be limited by the outer surface of lamp housing (4).

2. radiator according to claim 1 is characterized in that, each radiating fin (5) has a plurality of described openings (5-1).

3. radiator according to claim 2 is characterized in that, the edge of described opening (5-1) forms arc.

4. radiator according to claim 2 is characterized in that, the edge of described opening (5-1) forms circular arc.

5. according to any described radiator among the claim 1-4, it is characterized in that the opening (5-1) on the different radiating fins (5) is aimed at mutually, to form passage perpendicular to each radiating fin (5).

6. radiator according to claim 5 is characterized in that, the outer surface of described lamp housing (4) has fusiform convex shape, and described a plurality of radiating fins (5) are parallel to each other and are arranged vertically with respect to described outer surface.

7. radiator according to claim 6 is characterized in that, the maximum height of described opening (5-1) is 1/3 to 1/2 of corresponding radiating fin (a 5) height, and the width of described opening (5-1) is 1.5 to 2.5 times of described maximum height.