CN101414588B

CN101414588B - LED radiator

Info

Publication number: CN101414588B
Application number: CN2007101239950A
Authority: CN
Inventors: 张文祥; 余光; 赖振田
Original assignee: Hong Jun Precision Industry Co ltd; Fuzhun Precision Industry Shenzhen Co Ltd
Current assignee: QUANYIDA TECHNOLOGY (FOSHAN) Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2007-10-19
Filing date: 2007-10-19
Publication date: 2011-03-23
Anticipated expiration: 2027-10-19
Also published as: CN101414588A

Abstract

A light-emitting diode radiator comprises a substrate for affixing a light-emitting diode module and a plurality of cooling fins which are extended from the substrate, the cooling fins comprise first cooling fins and second cooling fins which are respectively extended from two reverse surfaces of the substrate, airflow channels are respectively formed in the various fins, and a plurality of notches which are inward extended and at least cut off part of the first cooling fins and the second cooling fins are arranged at the two sides of the substrate. Compared with the prior art, the cooling fins are formed on the two opposite surfaces of the substrate of the light-emitting diode radiator, thereby increasing the cooling area of the light-emitting diode radiator; meanwhile, a plurality of notches which are inward extended and cut off part of the cooling fins are arranged at the two sides of the substrate, the weight of the light-emitting diode radiator is reduced, and the natural convection of air in the cooling fins is enhanced, thereby upgrading the cooling efficiency of the light-emitting diode radiator under the premise of not increasing the size of the light-emitting diode radiator and the density of the cooling fins.

Description

LED radiator

Technical field

The present invention relates to a kind of radiator, particularly a kind of LED radiator.

Background technology

Light-emitting diode (Light Emitting Diode, be called for short LED), it is a kind of light emitting semiconductor device, it is to utilize semiconductor chip as luminescent device, by charge carrier compound energy of emitting surplus taking place causes photo emissions in semiconductor, directly send versicolor light such as red, indigo plant, the led lighting product utilizes light-emitting diode as the produced ligthing paraphernalia of light source exactly, is widely used in fields such as communication, illumination, traffic, billboards.But high brightness, High Power LED are understood the rising of Yin Wendu and caused luminous efficiency obviously to descend, even cause the damage of assembly, and be more outstanding in this problem of lighting field.Therefore, how the working temperature with light-emitting diode keeps within the specific limits to avoid the generation of above-mentioned phenomenon, is that high-capacity LED lamp is used the essential problem that solves.At present, the common way of industry is sticked radiator to distribute its heat below LED circuitboard, as U.S. Pat 6,517, promptly disclosed a kind of LED radiator 218B2 number, it comprises a substrate and the several dissipation fins of extending on this substrate, absorb the LED heat by substrate and pass to radiating fin, and the dependence radiating fin mode of radiations heat energy towards periphery dispels the heat.In order to improve its radiating efficiency, generally needing increases radiating fin quantity or increases the radiating fin size, but make the volume of LED radiator and entire lighting device increase thus, weightening finish.

Summary of the invention

In view of this, be necessary to provide a kind of LED radiator, the volume that it can be limited obtains preferable radiating effect, and then guarantees the work of light-emitting diode stability and high efficiency ground.

A kind of LED radiator, comprise the substrate that a confession light emitting diode module is sticked and go up extended some radiating fins, described radiating fin comprises respectively by substrate two opposite extended first radiating fin in surface and second radiating fins, be formed with gas channel between each fin respectively, the both sides of described substrate are provided with some the extension and the otch of cut-off parts first radiating fin and second radiating fin at least in it, described light emitting diode module adheres on the middle part, a wherein surface of described substrate, and described second radiating fin extends in the zone that this surface that posts light-emitting diode relies on the relative both sides of described substrate.

With respect to prior art, radiating fin of the present invention is formed on the relative two sides of substrate of LED radiator, has increased the area of dissipation of LED radiator; Simultaneously, because the both sides of substrate are provided with some the extension and the otch of cut-off parts radiating fin in it, both alleviated the weight of LED radiator, strengthen the free convection of air between radiating fin again, thereby under the prerequisite that does not increase LED radiator volume and radiating fin density, promoted the radiating efficiency of LED radiator.

The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.

Description of drawings

Fig. 1 is the inverted view of LED radiator in one embodiment of the present invention.

Fig. 2 is the stereogram of LED radiator among Fig. 1.

Fig. 3 is the end view of LED radiator among Fig. 2.

Fig. 4 is the vertical view that LED radiator marks the air-flow trend among Fig. 2.

Embodiment

See also Fig. 1 to Fig. 3, be the LED radiator in one embodiment of the present invention 10, be used for light emitting diode module 20 is dispelled the heat.This light emitting diode module 20 generally is as the light fixture light source of (figure does not show).

Above-mentioned light emitting diode module 20 closely is attached at this LED radiator 10 bottom surfaces, it comprises mutually parallel some circuit boards 22 and some light-emitting diodes 24 side by side, and these light-emitting diodes 24 evenly are installed on this circuit board 22 and with this circuit board 22 and electrically connect.

This LED radiator 10 adopts the metal or alloy of high thermal conductivity, makes as copper, aluminium or albronze material, and it comprises a roughly rectangular flat substrate 12 and the some radiating fins 14 that extend from these substrate 12 Surface Vertical.This substrate 12 has a bottom surface 120 and an end face 122 relative with this bottom surface 120.These radiating fins 14 comprise first radiating fin 144 on the end face 122 that is formed at this substrate 12 respectively and second radiating fin 142 on the bottom surface 120.These radiating fins 14 are parallel to each other and are arranged in side by side on the substrate 12, form some first gas channels 140 144 of first radiating fins, form some second gas channels 141 142 of second radiating fins.These light emitting diode module 20 parallel mid portions that are attached at the bottom surface 120 of substrate 12 side by side, second radiating fin, the 142 parallel both sides that are distributed in above-mentioned some groups of light emitting diode module 20 side by side.Offer some otch 16 respectively on this limit, substrate 12 two opposite sides, these otch 16 extend to substrate 12 in and with part first radiating

fin

144 and 142 cut-outs of second radiating fin along the direction vertical with first radiating fin 144 and second radiating fin 142.In the present embodiment, these otch 16 extend inwardly to second radiating fin, 142 positions the most inboard on the substrate 12, and these otch are along 12 liang of relative edge's perpendicular bisectors of substrate symmetry.Also be provided with the groove 18 of some cut-out first radiating fins 144 on substrate 12 end faces 122, these grooves 18 extend along the direction parallel with otch 16, form some the 3rd gas channels 180.These the 3rd gas channels 180 directly are communicated with respectively at two otch 16.In the present embodiment, the height of first radiating fin 144 and second radiating fin 142 is increased progressively to inner height by substrate 12 outer fixs along the direction parallel with otch 16 and groove 18, and promptly Zhong Bu first radiating fin 144 is than the height (referring to Fig. 3) of both sides.Whole LED radiator 10 is along the perpendicular bisector symmetry on limit, substrate 12 two opposite sides.This LED radiator 10 also is formed with the bottom surface 120 that some through holes 124 are used for light emitting diode module 20 is installed on substrate 12 on substrate 12.

In addition, a fan (figure does not show) can be installed so that the cooling blast that blows to LED radiator 10 to be provided above the end face 122 of this substrate 12.

See also Fig. 4, when light emitting diode module is worked, the substrate 12 of the LED radiator 10 that the heat of its generation at first is attached thereto absorbs, conducted on the radiating fin 14 that is formed on the substrate 12 thereupon, heat is dispersed in the surrounding air by these radiating fins 14 and goes, thereby effectively light emitting diode module 20 is dispelled the heat.In the present embodiment, when cooling blast blows to the end face 122 of substrate 12, part cooling blast flows and is flowed out by two shorter lateral sides of such directions of this substrate 12 along first gas channel 140 of 144 of first radiating fins, a part of in addition air-flow can flow along the 3rd gas channel 180 that some grooves 18 form and be flowed out than the long side direction by two of substrate 12, and some air communication is crossed some otch 16 and flowed into second gas channel 141 of 142 formation of second radiating fin on substrates 12 bottom surfaces 120 and flow out through two shorter lateral sides of such directions of substrate 12.Like this, cooling blast will be by three gas channels LED radiator 10 of flowing through, the heat that is flowed out by four direction at last and produce when taking away light emitting diode module 20 work.The gas channel that these otch 16 make win gas channel 140, second gas channel 141 and the 3rd gas channel 180 cross and become to communicate has strengthened the cross-ventilation of 14 of the radiating fins of LED radiator 10 greatly.Simultaneously, the radiating fin 14 of this radiator is formed at the relative two sides of substrate 12, has increased the efficiently radiates heat area of LED radiator 10.Therefore, the present invention is under the condition of volume that does not increase LED radiator and radiating fin density and have higher radiating efficiency.

Claims

1. LED radiator, comprise the substrate that a confession light emitting diode module is sticked and go up extended some radiating fins, it is characterized in that: described radiating fin comprises respectively by substrate two opposite extended first radiating fin in surface and second radiating fins, be formed with gas channel between each radiating fin respectively, the both sides of described substrate are provided with some the extension and the otch of cut-off parts first radiating fin and second radiating fin at least in it, described light emitting diode module adheres on the middle part, a wherein surface of described substrate, and described second radiating fin extends in the zone that this surface that posts light-emitting diode relies on the relative both sides of described substrate.

2. LED radiator as claimed in claim 1 is characterized in that: described first radiating fin is extended by another whole surface of substrate, and described first, second radiating fin is parallel to each other.

3. LED radiator as claimed in claim 2 is characterized in that: described otch extends in substrate along the direction vertical with first and second radiating fin, and extends to the second the most inboard radiating fin position.

4. LED radiator as claimed in claim 1 is characterized in that: described substrate is a rectangle plate body, and described otch is along the perpendicular bisector symmetric arrays on this limit, substrate two opposite sides.

5. LED radiator as claimed in claim 1 is characterized in that: also be provided with the groove of some cut-out first radiating fins, these grooves extend along the direction parallel with otch.

6. LED radiator as claimed in claim 5 is characterized in that: described groove directly is communicated with aforementioned otch respectively.

7. LED radiator as claimed in claim 1 is characterized in that: described first fin is increased progressively to inner height by the substrate outer fix along the direction parallel with otch, thereby is positioned at the first fin height of first fin at middle part than both sides.

8. as claim 1 or 7 described LED radiators, it is characterized in that: described second fin is increased progressively to inner height by the substrate outer fix along the direction parallel with otch.

9. LED radiator as claimed in claim 1 is characterized in that: described substrate is a rectangle plate body, and described LED radiator is along the perpendicular bisector symmetry on limit, substrate two opposite sides.