CN201819168U

CN201819168U - High-power light-emitting diode (LED) radiator

Info

Publication number: CN201819168U
Application number: CN2010201750500U
Authority: CN
Inventors: 杨继远
Original assignee: 杨继远
Current assignee: Polytron Technologies Inc
Priority date: 2010-04-30
Filing date: 2010-04-30
Publication date: 2011-05-04
Anticipated expiration: 2020-04-30

Abstract

The utility model provides a high-power light-emitting diode (LED) radiator, which comprises a radiating balancing plate and a plurality of radiating fins which are arranged on the radiating balancing plate, wherein the width of the radiating fin is larger than that of the radiating balancing plate, and the two ends of the radiating fins can respectively extend to form edges of the radiating fins. The use method of the high-power LED radiator is as follows: a heat conducting substrate of a high-power LED light source is arranged on the radiating balancing plate of the high-power LED radiator, and the parts of the radiating fins extending out of the radiating balancing plate, the two sides of the radiating balancing plate, and gap spaces between the radiating fins constitute air flow spaces; and the width of the heat conducting substrate of the LED light source is smaller than or equal to that of the radiating balancing plate, and an air flow outlet is arranged on a lamp shell positioned on the LED radiator and an air flow inlet is arranged on the lamp shell positioned below the LED radiator in order to strengthen the radiating effect of the LED lamp. The high-power LED radiator can achieve the efficient radiating effect.

Description

High-power LED radiator

Technical field

The utility model relates to the great power LED cooling technical field, is specially high-power LED radiator.

Background technology

High-power LED light source can produce a large amount of heat energy, according to luminous flux (lumen) and radiation flux (watt) operation relation: Km=6831m/w may produce the 6831m luminous flux when the radiation flux (black body radiation) under optimal situation of 1W as can be seen from relational expression.Therefore, even the light efficiency of LED reaches 1001m/w, only 15% of whole energy are converted into luminous energy output only, and all the other energy of 85% all are converted into heat energy.The life-span of led light source and LED junction temperature are closely bound up, facts have proved that junction temperature is low more, and the performance of attenuation and life performance is good more, can reach 30000 hours as long as junction temperature is low to the life-span below 45 ℃ in theory; The optical efficiency of led light source can descend along with the rising of junction temperature, experimental data in each chip producer, the light efficiency of white light LEDs is roughly the same with the ratio that the rising of junction temperature descends, 20 ℃ of light efficiencies of the every rising of junction temperature will descend about 5%, when its light efficiency has only normal temperature when junction temperature surpasses 80 ℃ 70%, on the contrary its light efficiency is 120% of a normal temperature when junction temperature is-40 ℃.So led light source only becomes luminous energy to a spot of power conversion, most of energy generation heat and junction temperature be high more, and to convert luminous energy to few more, so the high-power LED light source heat dissipation problem seems extremely important.

Because led light source only becomes luminous energy to a spot of power conversion, particularly the most of energy of high-power LED light source produces heat, and the heat dissipation problem of led light source will be a long-standing problem in the long term.

At present the radiating mode of high-power LED light source mainly contains: Natural Heat Convection, install fan forced heat radiation, heat pipe and loop heat pipe heat radiation etc. additional.The problem that may exist in the heat dissipation design has at present:

Fan radiating mode system complex, reliability is low, and the life-span of frequent fan is short more than chip, and industry is seldom used.

Emphasize heat conduction link, ignore the heat loss through convection link

The heat that common radiator sends element by the mode of heat transmission is delivered on the radiator, in thermal-radiating mode heat is distributed again.This type of radiator is in order to increase heat-sinking capability, arbitrarily increase the radiating fin or the fin of its surface area, its materials and processing and fabricating cost can increase, though radiator and electronic component are fixed as one and have increased area of dissipation in addition, heat is produced to be piled up, the heat that is unfavorable for element surface in time scatters and disappears, and can have influence on radiating effect.

In certain space, be not that area of dissipation is the bigger the better, though area of dissipation has increased, it is long-pending also to have formed thermal capacitance simultaneously, hot stack is arrived together, thereby reduced radiating effect, its radiating efficiency can't be improved, and hot-air just gathers around radiator, because this type of radiator has only been emphasized hot conduction link, has been ignored the heat loss through convection link, in fact be temperature-uniforming plate, the thermal source samming is fallen, though there is a lot of radiating fin radiating efficiencys unsatisfactory.

Although numerous producers has considered various measures, heat pipe, loop heat pipe, add heat conduction silicon fat or the like, do not recognize that heat finally still will rely on the external surface area of light fixture to loose.The heat pipe conductive performance is fine, but radiator performance also wants a complete radiator structure to realize.Emphasized heat radiation, ignored urban road landscape effect, no matter be die casting radiator, Section Bar Heat Sinks or heat-pipe radiator, their volume and outward appearance all are difficult to satisfy moulding attractive in appearance on the other hand.

The utility model content

The technical problems to be solved in the utility model provides a kind of high-power LED radiator of new structure

The technical scheme that solves the problems of the technologies described above employing is:

High-power LED radiator comprises heat radiation balancing disk and the multi-disc radiating fin that is arranged at, and the width of radiating fin is greater than the width of heat radiation balancing disk.

But the edge of radiating fin is extended at the radiating fin two ends respectively.

The profile of radiating fin can be a rectangle or trapezoidal or other are special-shaped, for cooperating the outline packages requirement of various light fixtures.

The using method of the utility model high-power LED radiator,

Be specially:

The heat-conducting substrate of high-power LED light source is installed on the heat radiation balancing disk of high-power LED radiator, the part of the wide balancing disk that goes out to dispel the heat of radiating fin and heat radiation balancing disk side, and the clearance space of radiating fin constitutes airflow space.

The width of the heat-conducting substrate of led light source is less than or equal to the width of the balancing disk that dispels the heat.

For strengthening the radiating effect of LED light fixture, the lamp outer casing that is positioned at LED radiator top offers air stream outlet, and the lamp outer casing that is positioned at LED radiator below offers the air-flow air inlet.

Good effect of the present utility model is: produce heat and make balancing disk heat after LED powers up, be transmitted to radiating fin by heat again and make that air heat forms hot gas between fin, under calm condition, hot-air is heated, and the back is basic vertically rises, form hot tropism's passage, for air provides kinetic energy and direction, hot gas rises by the fin space supplements cold of bottom and forms the effect that air-flow reaches high efficiency and heat radiation.

In addition with 60 of 3W large-power LED light beads, the constant current power supply mode, actual current 650mA, power supply input power 145W, LED actual power consumption 130W, the about 115W of actual heating power, 17 ℃ of environment temperatures, 37 ℃ of actual measurement soaking plate temperature show that this 3.8Kg aluminium alloy heat radiator and existing 10Kg radiator heat-dissipation effect are very approaching, the utility model radiator can be saved great deal of raw materials, and it can alleviate the overall weight of light fixture when using.Because the utility model heat spreader structures is simple, volume is little in light weight, fin can be made multiple shape, can pack in most conventional road lamp shells, helps the needs that urban road is beautified the environment.

Description of drawings

The structural representation of Fig. 1, the utility model high-power LED radiator;

Fig. 2, the utility model high-power LED radiator occupation mode schematic diagram.

The specific embodiment

The accompanying drawings specific embodiment, as shown in Figure 1 comprise heat radiation balancing disk 1 and be arranged at multi-disc radiating fin 2 on 1 that the width of radiating fin 2 is greater than the width of heat radiation balancing disk 1.

The edge of radiating fin 2 is extended at radiating fin 2 two ends respectively.

The profile of radiating fin 2 can be a rectangle.

The using method of the utility model high-power LED radiator is that two groups of high-power LED radiators are used, and is specially:

The heat-conducting substrate of high-power LED light source is installed in the heat radiation balancing disk 1 of high-power LED radiator, the part of the radiating fin 2 wide balancing disks 1 that go out to dispel the heat and heat radiation balancing disk 1 side, and the clearance space of radiating fin 2 constitutes airflow space 3.

The width of the heat-conducting substrate of led light source is less than the width of heat radiation balancing disk.

The above is embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present utility model.

Claims

1. high-power LED radiator comprises heat radiation balancing disk (1) and is arranged at multi-disc radiating fin (2) on (1) that it is characterized in that: the width of radiating fin (2) is greater than the width of heat radiation balancing disk (1).

2. high-power LED radiator according to claim 1 is characterized in that: radiating fin (2) but the edge of radiating fin (2) is extended at two ends respectively.

3. high-power LED radiator according to claim 1 and 2 is characterized in that: the profile of radiating fin (2) can be a rectangle or trapezoidal.