CN102230583A

CN102230583A - Novel light emitting diode (LED) lighting device having phase-change heat radiation function

Info

Publication number: CN102230583A
Application number: CN201110191926XA
Authority: CN
Inventors: 王干
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-11
Filing date: 2011-07-11
Publication date: 2011-11-02

Abstract

The invention relates to a novel light emitting diode (LED) lighting device having a phase-change heat radiation function. The novel LED lighting device comprises LED modules, a hollow cavity heat dissipation substrate, a phase-change medium, a silver-coated reflector and a cambered glass lampshade. The LED modules are arranged in the silver-coated reflector on one side of the hollow cavity heat dissipation substrate; the cambered glass lampshade is covered outside the silver-coated reflector; the phase-change medium is packaged in a hollow cavity of the heat dissipation substrate; heat emitted by the LEDs is transmitted to the phase-change medium in the hollow cavity through the heat dissipation substrate; as the potential heat of the phase-change medium is high, the LED modules can be controlled within a certain constant temperature; and in the day, when the LEDs do not work, the phase-change medium releases the heat outward so as to finish a transmission process of the heat from the LED modules to the outside air.

Description

A kind of novel LED lighting device with phase-change heat function

Technical field

The present invention relates to a kind of LED lighting device, be specifically related to a kind of novel LED lighting device with phase-change heat function.

Background technology

At present the road lighting light source mainly adopts high-pressure mercury lamp, but high-pressure mercury lamp is only at the more high-power high light efficiency of competence exertion down, and its power is big, energy consumption is high and cause certain light pollution, the requirement of more and more incompatible modern green illumination.The most energy-conservation road lighting light source should be that LED has thrown light at present, low-power LED lamp is a cold light source, do not need special heat abstractor, accepted by people, low-power LED lamp has not satisfied people's demand, high-power LED light source progressively begins to develop, and begin to be applied in the lighting field, particularly be used in the street lighting, be subjected to people's common concern, but high-powered LED lamp is different with small-power, great power LED chip when luminous can produce a large amount of heat, can not in time be derived as this heat and shift out, and can directly influence the luminous efficiency of LED, according to test high-power LED street lamp light source, surface temperature can operate as normal below 60 ℃ the time, but temperature is more than 60 ℃, 5 ℃ of its light decays of every rising just increase by 10%, and influence the service life of LED greatly.Current, also there is the heat radiation of pair great power LED to carry out certain processing, as increase radiating surface, but along with the power of LED is increasing, huge fin is given the making of light fixture, installation and application bring certain trouble, even temperature also is difficult to guarantee in suitable scope like this, particularly very high in the summer environment temperature, be difficult to guarantee the LED street lamp the LED module temperature below 60 ℃ along with the demand of road lighting, the power of LED lamp is increasing, if heat dissipation problem that can not the good treatment high-powered LED lamp, high-powered LED lamp are difficult to further promote, above problem needs to be resolved hurrily.

Summary of the invention

In order to solve the heat dissipation problem of China's city illumination energy consumption height and high-power LED illuminating lamp.The invention provides a kind of novel LED lighting device with phase-change heat function.The technical scheme that the present invention is taked for its purpose of realization: a kind of novel LED lighting device with phase-change heat function comprises: LED module, cavity heat dispersion substrate, phase change medium, silver-plated reflector, arc glass lampshade.At first the LED module is installed in the silver-plated reflector of a side of cavity heat dispersion substrate, arc glass lampshade on the outer mask, phase change medium is encapsulated in the cavity of heat dispersion substrate, the heat that LED sends passes to the phase change medium of heat radiation in the cavity by heat dispersion substrate, because the latent heat of phase change medium is very big, can control the LED module in certain steady temperature, when daytime, LED did not work, the outside release heat of phase change medium, finish like this heat by the LED module to the airborne process of passing in the external world.

Described LED module, it is characterized in that the LED module is the great power LED module, the power of single LEDs module does not wait at 1-50W, whole LED is put by certain LED module matrix and is constituted, the power of whole LED illuminating lamp is between 20-300W, connect by certain electronic circuit between each LED module monomer, electronic circuit can be controlled the voltage and current of each LED module monomer, guarantee that the LED module can not damaged by overvoltage or overcurrent, the electric power pin of LED module back side chip is little heat dispersion substrate, and LED module front chip encapsulates with high transparent resin or high purity quartz.

Described cavity heat dispersion substrate, it is characterized in that the cavity heat dispersion substrate is the aluminium matter or the magnadure heat dispersion substrate of hollow, it can be square or the conventional road lamp shape, the centre is a sealed cavity, fill a certain amount of phase change medium in the cavity, the phase change medium amount of fill accounts for 80% of whole cavity, then cavity is pumped into certain vacuum and sealing, there is radiating fin at the back side of hollow heat dispersion substrate, be beneficial to the heat radiation of whole lamp, there are honeycomb fashion or the silver-plated reflector of slot type in the front of cavity heat dispersion substrate, the LED module is installed in the silver-plated device the inside of giving out light, the projection surface of each row's reflector all is an arc surface or parabola, the projection light of LED module is projected on the road surface uniformly, high transparent glass cover on the outer mask of reflector.

Described phase change medium is characterized in that phase change medium is the solid-liquid phase change material, and phase change medium mainly contains paraffin, nano aluminum and graphite and mixes formation.In phase change medium, the consisting of of each component: paraffin mass percent 60-95%, nano aluminum mass percent 1-20%, graphite mass percent 4-20%, phase transition temperature is between 50-60 ℃.

Beneficial effect of the present invention

1, because phase change medium dispels the heat, improves the radiating efficiency of light source greatly, improved the reliability of led light source.

2, owing to adopted LED cambered surface lighting, improved the crevice projection angle of LED module, made the LED range of exposures bigger more even.

3, in paraffin matrix, be doped with graphite and nano aluminum, thermal conductivity when having strengthened the medium phase transformation greatly, and reduced the phase change medium consumption, solve the heat dissipation problem of high efficiency light source, so just strengthened the stability of system, made things convenient for the installation and maintenance of street lamp, reduce operating cost, helped energy-saving and emission-reduction.

Owing to adopted technique scheme, thereby make the present invention solve the restriction condition that the efficient LED energy-conserving light source is used at major trunk roads in fact, the LED illumination is combined with phase-change heat, realized the energy-efficient of roadway lighting system, reliable and stable and the low-cost characteristics of system are beneficial to the realization of target for energy-saving and emission-reduction.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is a structural representation of the present invention:

1, LED module, 2, the cavity heat dispersion substrate, 3, phase change medium, 4, silver-plated reflector, 5, the arc glass lampshade.

The specific embodiment

Referring to Fig. 1, a kind of novel LED lighting device: 1, LED module, 2, the cavity heat dispersion substrate, 3, phase change medium, 4, silver-plated reflector, 5, the arc glass lampshade with phase-change heat function.Each composition of at first preparing phase change medium 3 during enforcement is by paraffin mass percent 60-95%, nano aluminum mass percent 1-20%, and graphite mass percent 4-20% carries out proportioning, constantly adjusts each constituent mass percentage, makes phase transition temperature between 50-60 ℃.The phase change medium that configures directly is filled in the cavity of cavity heat dispersion substrate 2, the phase change medium amount of fill accounts for 80% of whole cavity, cavity heat dispersion substrate 2 is pumped into certain vacuum to be sealed, the LED module is installed in 4 li of the silver-plated reflectors in cavity heat dispersion substrate 2 fronts, connect between each LED module monomer by electronic circuit, in the outside of silver-plated reflector 4, arc glass lampshade 5 on the cover, the whole LED lamp installation is finished.Connect civil power and solar electric power power supply, the work of LED light fixture, because LED in the course of the work, LED can produce a large amount of heat, and this heat reaches phase change medium 3 by cavity heat dispersion substrate 2, and phase change medium 3 absorbs heat and undergoes phase transition, phase change medium becomes latent heat to a large amount of sensible heats in phase transition process, make cavity heat dispersion substrate 2 all the time in a steady temperature, guaranteed that LED moves all the time, has strengthened the stability of system when work under with constant low temperature.

Claims

1. a novel LED lighting device with phase-change heat function comprises: LED module, cavity heat dispersion substrate, phase change medium, silver-plated reflector, arc glass lampshade; It is characterized in that the LED module is installed in the silver-plated reflector of cavity heat dispersion substrate one side, arc glass lampshade on the outer mask, phase change medium is encapsulated in the cavity of heat dispersion substrate, the heat that sends during LED work, pass to the phase change medium of heat radiation in the cavity by heat dispersion substrate, when LED does not work, the outside release heat of phase change medium, finish like this heat by the LED module to the airborne process of passing in the external world.

2. a kind of novel LED lighting device according to claim 1 with phase-change heat function, it is characterized in that described LED module is the great power LED module, the power of single LEDs module does not wait at 1-50W, whole LED is put by certain LED module matrix and is constituted, and the power of whole LED illuminating lamp is between 20-300W.

3. a kind of novel LED lighting device according to claim 1 and 2 with phase-change heat function, it is characterized in that connecting by certain electronic circuit between described each LED module monomer, electronic circuit can be controlled the voltage and current of each LED module monomer, the electric power pin of LED module back side chip is little heat dispersion substrate, and LED module front chip encapsulates with high transparent resin or high purity quartz.

4. a kind of novel LED lighting device according to claim 1 with phase-change heat function, it is characterized in that aluminium matter or magnadure heat dispersion substrate that described cavity heat dispersion substrate is a hollow, it can be square or the conventional road lamp shape, the centre is a sealed cavity, fill a certain amount of phase change medium in the cavity, the phase change medium amount of fill accounts for 80% of whole cavity.

5. according to claim 1 or 4 described a kind of novel LED lighting devices with phase-change heat function, it is characterized in that the cavity of described cavity heat dispersion substrate is pumped into certain vacuum and sealing, there is radiating fin at the back side of hollow heat dispersion substrate.

6. according to claim 1 or 4 described a kind of novel LED lighting devices with phase-change heat function, it is characterized in that there are honeycomb fashion or the silver-plated reflector of slot type in described cavity heat dispersion substrate front, the projection surface of each row's reflector all is an arc surface or parabola, high transparent glass cover on the outer mask of reflector.

7. a kind of novel LED lighting device according to claim 1 with phase-change heat function, it is characterized in that described phase change medium is the solid-liquid phase change material, phase change medium mainly is made of paraffin, nano aluminum and graphite mixing, and phase transition temperature is between 50-60 ℃.

8. according to claim 1 or 7 described a kind of novel LED lighting devices with phase-change heat function, it is characterized in that consisting of of described each component of phase change medium: paraffin mass percent 60-95%, nano aluminum mass percent 1-20%, graphite mass percent 4-20%.