CN101539285A

CN101539285A - LED radiating loop structure

Info

Publication number: CN101539285A
Application number: CN200910083421A
Authority: CN
Inventors: 刘征
Original assignee: SHENZHEN HAOMAI ELECTRIC APPLIANCE CO Ltd
Current assignee: Shenzhen Sanma Electrical Appliances Co., Ltd.
Priority date: 2009-04-30
Filing date: 2009-04-30
Publication date: 2009-09-23

Abstract

The invention discloses an LED radiating loop structure, comprising a radiating plate. The radiating plate is a hollow plate and filled with heat-carrying liquid therein. The lower end of the radiating plate is connected with an aluminium base plate. The radiating plate comprises an upper hot plate, hollow pipes and a lower hot plate. The upper hot plate is connected with the lower hot plate through the hollow pipes. The lower hot plate is connected with the aluminium base plate that is connected with a device for sealing lamps. The hollow pipes are arranged at the two ends of the upper hot plate. The number of the hollow pipes is four. One end of the upper hot plate is provided with two hollow pipes. The surfaces of the upper hot plate, the hollow pipes and the lower hot plate are coated with far infrared paint. The invention integrally conducts heat and radiates heat, and can lead out heat in time. The far infrared paint can effectively radiate heat and uniformly radiate heat so as to effectively ensure the service life of the LED lamps. The structure has the advantages of light weight and small volume and the advantages that the surface cannot collect dust easily and the structure is easily cleaned.

Description

A kind of LED radiating loop structure

Technical field

The invention belongs to the great power LED cooling field, be specifically related to a kind of LED radiating loop structure.

Background technology

Society is improving, and science and technology is in development." energy-saving and emission-reduction, environmental protection " is the theme song of New Times new century.LED is the industry of energy-saving and emission-reduction, is the industry that meets the novel view of development, but the heat dissipation problem of great power LED is the bottleneck problem of this field development always.The good heat sink conception and the radiator of superior performance can effectively guarantee high power device safety, and reliability service increases the service life.

LED is a kind of photoelectric device, but in its course of work only the electric energy of some convert luminous energy to, remaining electric energy nearly all converts heat energy to, even the light efficiency of LED reaches 200lm/W, also have only 29% electric energy to change into luminous energy, remaining nearly all changes into heat energy, and the temperature of LED is raise.And the rising of LED junction temperature can make the LED light efficiency reduce, the lost of life, and when its junction temperature rose above maximum allowable temperature, great power LED can damage because of overheated.

Appearing at of heat pipe solved certain heat dissipation problem to a great extent.Heat pipe is a kind of heat conducting element very efficiently, and its heat transfer efficiency can reach tens times of metal.Since hot pipe technique is introduced into the radiator manufacturing, with the heat pipe is core, the heat pipe module that cooperates heat sink, fin, fan etc. to constitute, can solve because of the space narrow and small or heat and too concentrate a heat radiation difficult problem that causes, overcome heating power that the traditional heat-dissipating pattern can't overcome and the contradiction between the efficiently radiates heat ability.But along with the high power device heat flow density is more and more higher, present technology can not satisfy the demand of social development.

At present the radiating mode of LED street lamp mainly contains: Natural Heat Convection, install fan forced heat radiation, heat pipe and loop heat pipe heat radiation etc. additional.Install fan forced heat radiation mode system complex additional, reliability is low, heat pipe and loop heat pipe radiating mode cost height.

Heat pipe is to utilize the phase-change heat-exchange of liquid to transmit heat, and the phase-change heat-exchange coefficient is 2500-35000W/m during boiling ²The phase-change heat-exchange coefficient was 5000-25000W/m when .k steam condensed ².k, be applied in a lot of aspects at present, heat pipe can be derived heat timely, plays the purpose of heat radiation and samming, generally all uses heat pipe than the CPU heat radiation of higher-end at present, and heat pipe be we can say on the heat radiation circle and performed meritorious deeds never to be obliterated.But it is just not too suitable to use in the occasion that thermal source disperses relatively, disperses heat radiation such as great power LED.

Existing LED light fixture generally dispels the heat by fin, but, the space between the fin is arranged in parallel because being, be parallel on the horizontal direction of heat-radiating substrate, can only form a direction-convection current longitudinally, can't utilize wind to blow formed convection current from direction perpendicular to fin surface, circulation of air between the fin has some setbacks, and radiating effect is bad.Even dispel the heat, effectively utilized transverse convection and vertically convection current, but because fin is very close, and NATURAL CONVECTION COEFFICIENT OF HEAT is also very low, heat is not easy to shed by the ejection formation fin.Radiation effect of fin is not very desirable, also has Heavy Weight, should not install, dust stratification, fouling shortcoming such as easy cleaning not easily in air throughout the year.

Summary of the invention

The objective of the invention is defective at above-mentioned prior art, provide a kind of can in time heat be conducted and in light weight, volume is little, the surface is difficult for dust stratification, easy cleaned LED radiating loop structure.

The technical scheme taked of the present invention is to achieve these goals: a kind of LED radiating loop structure, comprise heat sink, described heat sink is a hollow sheeting, be filled with the steam of thermal liquid or this liquid in the described heat sink, link to each other with aluminium base below the described heat sink, described aluminium base links to each other with the device of sealed lamps.

Described heat sink comprises hot plate, hollow pipe and following hot plate, and the described hot plate of going up connects hot plate down by hollow pipe, and described hot plate down links to each other with aluminium base.

Described hollow pipe is arranged on the two ends of hot plate.

The described hot plate of going up is superimposed by two-layer above plate.

Described hollow pipe is 4, and a described end of going up hot plate is provided with two hollow pipes.

Described surface of going up hot plate, hollow pipe and following hot plate all scribbles far ultrared paint.

Described aluminium base one end links to each other with power unit, scribbles far ultrared paint on the shell of described power unit.

The present invention has the incorporate characteristics of heat conduction and heat radiation, and its beneficial effect is:

1.PN the knot heat can be derived timely: because heat sink directly links to each other with aluminium base, the heat conductivity of hot plate is fine, and heat derivation at the right time is then by enough big hot plate radiating surface heat radiation, make the PN junction temperature be unlikely to too high, effectively guaranteed the life-span of LED lamp.

2. effective heat loss through radiation of far ultrared paint: on whole hot plate linker, coat thick far ultrared paint greater than 30 μ m, according to heat radiation formula Q=￡ A σ T4, effectively the heat of the lost 20%-30% of radiation can effectively reduce area of dissipation like this.

3. the entire heat dissipation surface temperature compares homogeneous: because the entire heat dissipation face is made up of the hot plate linker, temperature does not have too big-difference, has effectively utilized heat sink material.

4. planform is fairly simple: in light weight, volume is little, the high-altitude wind is exposed to the sun and rain and also can not deposited too many dust outside throughout the year, even there are some fouls also can oneself clean up when rainy, hide dirt easily and cleans difficult unlike traditional fin.

Description of drawings

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

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

Fig. 3 is an operation principle profile of the present invention.

Among the figure: hot plate on 1,2 hollow pipes, 3 times hot plates, 4 aluminium bases, 5 power units, the device of 6 sealed lamps.

The specific embodiment

The invention will be further described below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.

Referring to Fig. 1 and Fig. 2, a kind of LED radiating loop structure, comprise heat sink, described heat sink is a hollow sheeting, be filled with the steam of thermal liquid and/or this liquid in the described heat sink, link to each other with aluminium base 4 below the described heat sink, aluminium base 4 links to each other with the device 6 of sealed lamps, as a kind of preferred embodiment, heat sink can be the hot plate linker, it comprises hot plate 1, hollow pipe 2 and following hot plate 3, last hot plate 1 connects hot plate 3 down by hollow pipe 2, as a kind of preferred, hollow pipe 2 is 4, be arranged on the two ends of hot plate up and down, every end is provided with two hollow pipes 2, and following hot plate 3 links to each other with aluminium base 4.Aluminium base 4 one ends link to each other with power unit 5, and the surface of last hot plate 1, hollow pipe 2 and following hot plate 3 and the shell of power unit all scribble far ultrared paint.According to LED lamp power, last hot plate 1 can also be superimposed by multilayer greater than one deck.

Current-carrying liquid can be selected Dowtherm A, water, mercury, acetone, ammonia, methyl alcohol, ethanol, ethane etc. for use; To consider the factors such as compatibility of working environment, material during concrete the selection.

Operation principle of the present invention: referring to Fig. 3, during this LED lamp work, heat is passed to aluminium base 4 from PN junction, directly the hot plate internal liquid that vacuumizes that links to each other with aluminium base 4 is seethed with excitement by thermal evaporation, steam takes heat to hot plate 1 from following hot plate 3 by hollow pipe 2 on one side, vapours becomes condensing drip in this cooling, and the effect of dependence gravity is back to down circulation of hot plate 3 formations again from the hollow pipe 2 of another side, and heat is taken away in cyclic process endlessly.Simultaneously be coated with the last layer far ultrared paint on hot plate linker surface, the surface has just formed heat loss through convection and two kinds of radiating modes of heat loss through radiation like this.

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

Claims

1. LED radiating loop structure, it is characterized in that: comprise heat sink, described heat sink is a hollow sheeting, is filled with thermal liquid in the described heat sink, links to each other with aluminium base below the described heat sink, described aluminium base links to each other with the device of sealed lamps.

2. a kind of LED radiating loop structure according to claim 1 is characterized in that: described heat sink comprises hot plate, hollow pipe and following hot plate, and the described hot plate of going up connects hot plate down by hollow pipe, and described hot plate down links to each other with aluminium base.

3. a kind of LED radiating loop structure according to claim 2, it is characterized in that: described hollow pipe is arranged on the two ends of hot plate.

4. a kind of LED radiating loop structure according to claim 2 is characterized in that: the described hot plate of going up is superimposed by two-layer above plate.

5. a kind of LED radiating loop structure according to claim 3 is characterized in that: described hollow pipe is 4, and a described end of going up hot plate is provided with two hollow pipes.

6. according to each described a kind of LED radiating loop structure of claim 1 to 5, it is characterized in that: described surface of going up hot plate, hollow pipe and following hot plate all scribbles far ultrared paint.

7. according to each described a kind of LED radiating loop structure of claim 1 to 5, it is characterized in that: described aluminium base one end links to each other with power unit, scribbles far ultrared paint on the shell of described power unit.