CN201322283Y

CN201322283Y - High power LED (light-emitting diode) street lamp

Info

Publication number: CN201322283Y
Application number: CNU2008201394763U
Authority: CN
Inventors: 刘征
Original assignee: SHENZHEN HAOMAI ELECTRIC APPLIANCE CO Ltd
Current assignee: Shenzhen Sanma Electrical Appliances Co., Ltd.
Priority date: 2008-10-31
Filing date: 2008-10-31
Publication date: 2009-10-07
Anticipated expiration: 2018-10-31

Abstract

The utility model relates to a street lamp, particularly to a high power LED street lamp which comprises a lamp post and a lamp body. The lamp body is mounted at the top of the lamp post, and comprises a lamp housing and a lamp holder; a far-infrared radiating coating layer is arranged on the outer surface of the lamp housing; a triple prism body is arranged on the inner surface of the glass lamp holder; and a heat conducting device of a heat pipe is arranged in an aluminum base board at the upper part of the triple prism body. Compared with the prior art, the high power LED street lamp of the utility model has the characteristics of scientific and reasonable design, simple structure, uniform illumination, good radiation effect, long light source service life and the like.

Description

A kind of high-power LED street lamp

Technical field

The utility model relates to a kind of street lamp, and a kind of high-power LED street lamp specifically is provided.

Background technology

As a kind of novel lighting source, LED since characteristics such as energy-saving and environmental protection, life-span that itself had are long, colour rendering good, luminous stable, high, the no stroboscopic of luminous efficiency and bad dazzle receive much concern.At the beginning of 2006, " energy-efficient, long-life semiconductor lighting product " is put into China's medium-term and long-term plans first major fields.In October in the same year, national 863 Program " semiconductor lighting engineering " major project formally starts.

Yet the characteristics of luminescence of led light source is that range of exposures is less, and mainly with the linear fashion projection source, angle is more little when luminous, and light source will be bright more, otherwise can deepening.Common LED illuminating lamp makes up with a plurality of LED, the light emitting diode that adopts the distribution of plane lattice form is as light source, though can obtain the higher lighting source of brightness, but owing to be subjected to LED straight line projection restriction, the road lamp body range of exposures that is made up is still limited, lamp stand central area irradiation brightness is higher, and deep fringe region is darker, and the brightness uniformity in its effective illumination range is relatively poor.

In addition, the LED luminescence mechanism is can band-to-band transition produce light again by electronics, does not contain infrared composition in its spectrum, and therefore, the heat of generation can not send by radiation, so LED is a cold light source.When it under the extra electric field effect, the radiation recombination generation electricity in electronics and hole causes effect, and part energy is converted into heat energy.The luminous efficiency of LED only can reach 10%-20% at present, and the energy of all the other 80%-90% is converted into heat energy.Raising along with LED power, the corresponding increase of heat flow density, cause PN junction junction temperature rising in the chip, this fuel factor that is caused by temperature rise produces serious influence to the performance of LED: make the luminescent spectrum generation red shift of chip, if wavelength shift is too much, departed from the absworption peak of fluorescent material, to cause the fluorescent material quantum efficiency to reduce, influence light extraction efficiency, cause the variation of white light LEDs colour temperature, colourity, even cause chip to burn thereby radiation wavelength is changed.Therefore, the various fuel factors that produce owing to the temperature rising can badly influence the service life and the reliability of LED device.The method that solves the LED heat dissipation problem now mainly contains two kinds: the one, improve the device internal quantum efficiency; The 2nd, improve LED structure and external heat sink, accelerate distributing of internal heat, these two kinds of methods all are to improve radiating efficiency from chip internal, radiating effect is not good.

Summary of the invention

The utility model is at above deficiency, provides that a kind of reasonable in design, simple in structure, range of exposures is big, the high-power LED street lamp of good heat dissipation effect.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of high-power LED street lamp, comprise lamp stand and lamp body, described lamp body is arranged at the top of described lamp stand, described lamp body comprises lamp housing and lamp socket, described lamp housing outer surface is provided with far infrared heat radiation skin of paint, and described glass lamp holder inner surface is provided with the prism body, is provided with the heat pipe for thermal conductivity device in the aluminium base on described prism body top, the heat at LED diode PN junction place is guided to aluminium lamp body shell, heat radiation is gone out by far ultrared paint.

A kind of high-power LED street lamp of the present utility model, it has following characteristics:

1) adopts heat pipe for thermal conductivity.

The principle of hot pipe technique is very simple in fact, utilizes the evaporation of working fluid and condensation to transmit heat exactly.Charge into working fluid after copper pipe inside vacuumized, fluid circulates in inside repeatedly with the phase transition process of evaporation-condensation, and constantly the heat with the hot junction reaches colling end, thereby forms the diabatic process that heat is reached the other end from an end of pipe.

In the utility model, heat pipe conduction heat is installed at the aluminium base place below emitting led, thereby accelerates its heat radiation.

2) on lamp housing, be coated with last layer far infrared heat radiation coating and carry out heat loss through radiation.

Infra-red radiation is called infrared or infrared ray traditionally, also claims heat radiation.As far back as 1800, Britain astronomer prestige Hao thanked out (WHerschel) when the fuel factor of research sunshine different color part, has chanced on the strong infrared ray of this thermal effect of radiation.After this, experience 100 years, people are familiar with the essence of infra-red radiation and set up basic radiation law, make the application of infrared radiant material and research obtain development rapidly.As everyone knows, the heat transmission is carried out in three kinds of modes, i.e. conduction heat transfer, convection heat transfer' heat-transfer by convection and radiant heat transfer.At low thermophase, heat exchange is based on convection heat transfer' heat-transfer by convection, and at hot stage, then based on radiant heat transfer.Along with the rising of temperature, the radiant heat transfer role is increasing.By radiant heat transfer philosophy and computing formula as can be known, improve the surface emissivity coefficient of radiant body, will help the reinforcement of radiant heat transfer.

When the LED lamp is luminous, its aluminium base can produce certain heat, by conduction and convection current heat is dispersed into the aluminium base outside, and the speed that the speed of outside heat radiation is generated heat less than aluminium base, heat can accumulate in the inside of whole lamp, by coat infrared radiation coating in its case surface, improve the radianting capacity of its surperficial shell, the strengthening surface radiant heat transfer distributes heat fast, prolongs heater element service life, delays deformed element process and performance decrease speed.

3) enlarge the scattering of light scope by prism

Utilize the refraction action of prism to enlarge the scattering of light scope.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a kind of overall structure schematic diagram of high-power LED street lamp;

Fig. 2 is a kind of lamp body structure cutaway view of high-power LED street lamp;

Fig. 3 is an A place structure enlarged diagram among Fig. 2;

Fig. 4 is a B place structure enlarged diagram among Fig. 2.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as to qualification of the present utility model.

Provide a most preferred embodiment below:

Shown in accompanying drawing 1-4, a kind of high-power LED street lamp, comprise lamp stand 1 and lamp body 2, described lamp body 2 is arranged at the top of described lamp stand 1, described lamp body 2 comprises lamp housing 21 and lamp socket 22, described lamp housing 21 outer surfaces are provided with far infrared heat radiation coating layer 23, and described glass lamp holder 22 inner surfaces are provided with prism body 24, are provided with heat pipe for thermal conductivity device 26 in the aluminium base 25 on described prism body 24 tops.

As can be seen, one group of heat pipe for thermal conductivity device 26 has been installed at bottom aluminium base 25 places has been used for heat radiation, when lighting the LED lamp, its aluminium base 25 heatings, heat is transmitted to an end of heat pipe for thermal conductivity device 26, the heat pipe for thermal conductivity device 26 1 ends arrival uniform temperature of being heated, the wherein hydraulic fluid vaporization of being heated, steam flows to an other end under pressure reduction, other end temperature is lower, be condensed into liquid state after the steam chance is cold and under the gravity effect, flow back to heating end, and so forth, heat is distributed.

On lamp housing 21 outer surfaces, be coated with the last layer infrared radiation coating, strengthened the radianting capacity of shell, strengthen its surface radiating, heat from LED lamp housing 21 internal radiations to air.

By above two steps LED lamp is accumulated in shell 21 interior heats and be dispersed into the lamp outside.

In aluminium base 25 lower ends prism body 24 has been installed,, has been improved the scattering of light scope by its refraction action diverging light.

Above-described embodiment, the utility model specific embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solutions of the utility model scope and replacing all should be included in the protection domain of the present utility model.

Claims

1, a kind of high-power LED street lamp, comprise lamp stand and lamp body, described lamp body is arranged at the napex of described lamp stand, described lamp body comprises lamp housing and lamp socket, it is characterized in that, described lamp housing outer surface is provided with far infrared heat radiation coating layer, and described glass lamp holder inner surface is provided with the prism body, is provided with the heat pipe for thermal conductivity device in the aluminium base on described prism body top.