CN201547722U

CN201547722U - Radiating fin for high power LED lamp

Info

Publication number: CN201547722U
Application number: CN2009202052715U
Authority: CN
Inventors: 李廷帅
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-30
Filing date: 2009-09-30
Publication date: 2010-08-11
Anticipated expiration: 2019-09-30

Abstract

The utility model provides a radiating fin for a high power LED lamp, comprising a metal base, a plurality of metal fins are integrated with the right side of the metal base and distributed on the metal base, the grooves are opened on the back side of the metal base at intervals, the grooves are communicated with the right side of the metal base. The radiating fin provided by the utility model can ensure that a large number of heat generated by the high power LED lamp can be quickly and evenly transferred outside in a heat conduction and natural convection way, the PN junction temperature of the high power LED lamp is ensured to be lower than 55 DEG C, the lumens depreciation of the LED lamp can be reduced, and the service life of the LED lamp can be greatly prolonged.

Description

The fin that can be used for high-powered LED lamp

Technical field

The utility model belongs to the radiator field, is specifically related to a kind of fin that can be used for high-powered LED lamp.

Background technology

LED light lamp (being the LED lamp) under the effect of extra electric field, its electronics and hole-recombination generation electricity cause the effect and luminous, yet some energy will be by the radiationless compound heat that is converted into.At present, the luminous efficiency of LED lamp is lower, and most of electric energy is converted into heat energy, if this part heat energy can not in time distribute, the interior junction temperature of PN junction of chip is raise, this can cause the red shift of chip peak wavelength, the absworption peak that departs from fluorescent material causes that power efficiency descends; Cause fluorescent material aging; Cause the epoxy resin flavescence; Quicken wearing out of device etc.For solving heat dissipation problem, on high-powered LED lamp, all fin need be installed, most of heat is discharged fast, yet existing fin exists area of dissipation little on the market, and configuration design is unreasonable, heat-sinking capability is poor, shortcomings such as heatsink temperature height can not effectively reduce the junction temperature of PN junction, have limited applying of high-powered LED lamp.

Summary of the invention

The purpose of this utility model is to provide a kind of excellent radiation performance, the fin that can be used for high-powered LED lamp that radiating efficiency is high at the problems referred to above of the fin existence on the existing LED lamp.

The purpose of this utility model is achieved in that the utility model comprises metab, be connected with the number of metal fin in the front of described metab, metal fins is arranged on the metab, the back side at described metab has groove every a segment distance, and groove communicates with the front of metab.

Technique effect of the present utility model is: the utility model has groove at the base back every a segment distance, air can be in groove and the free flow of metal fins gap, guaranteed that heat can be delivered to the air from metal fins in the mode of convection current, can high efficiency lower heatsink temperature.The utility model fin can guarantee that a large amount of heats that high-powered LED lamp produces can the uniform rapidly mode with heat conduction and free convection pass, guarantee that high-powered LED lamp PN junction temperature is lower than 55 ℃, reduce the light decay of LED lamp, greatly prolonged the service life of LED lamp.

Description of drawings

Fig. 1, Fig. 2, Fig. 3, Fig. 4 are respectively Facad structure schematic diagram, side-looking structural representation, cross section structure figure, the structure schematic diagrames of embodiment.

Fig. 5 is the isometric front view of embodiment.

Fig. 6 is the A enlarged drawing of Fig. 5.

Fig. 7 is the rear isometric view of embodiment.

Fig. 8 is the B enlarged drawing of Fig. 7.

Fig. 9 is the front three-dimensional structure diagram that has adopted the high-power LED lamp of embodiment.

Figure 10 is the back side three-dimensional structure diagram that has adopted the high-power LED lamp of embodiment.

The specific embodiment

Referring to Fig. 1 to Fig. 8, the fin of present embodiment is a strip, it comprises metab 3, be connected with number of metal fin 1 in the front of metab 3, metal fins 1 vertically evenly equidistantly is arranged on the metab 3 along laterally reaching, for increasing area, metal fins 1 surface is designed to wavy, the back side at metab 3 has groove 2 every a segment distance, and groove 2 communicates with the front of metab, and air can freely circulate at the fin front and back, pass groove 2, pass the room of 1 of metal fins, this helps heat and passes in the mode of thermal convection current, has strengthened cross-ventilated ability; The back side of smooth place, the back side of metab 3 and led circuit plate or heat conductor etc. are close in use, and metab 3 also plays a part to support and be connected metal fins 1, has the screw position that usefulness is installed in metab 3 two ends outermost.

Referring to Fig. 5 and Fig. 6; adopted the high-power LED lamp of the foregoing description fin to comprise metal lamp bracket 7; the fin of present embodiment and ten light-emitting diode light bars 5 (being called for short " LED lamp bar 5 "); metal lamp bracket 7 is a frame structure; connect to form by Aluminum Hollow type bar; the two ends of LED lamp bar 5 are by the fixing plastic parts of interface; lamp bar fixedly plastic parts interface is fixed in the metal lamp bracket 7; fixedly be provided with the screens of lamp bar interface on the plastic parts at interface; in each lamp bar interface screens, be provided with the copper sheet interface; the quantity of lamp bar interface screens equates with the quantity of LED lamp bar 5; fixedly be provided with the screens of lamp bar on the plastic parts at the lamp bar; its quantity equates with the quantity of LED lamp bar 5; ten light-emitting diode light bars 5 with a determining deviation parallel equidistant side by side in metal lamp bracket 7; the head end of every light-emitting diode light bar 5 and tail end are contained in interface fixedly the lamp bar interface screens of plastic parts and lamp bar fixedly in the lamp bar screens of plastic parts respectively; the lamp bar power interface of light-emitting diode light bar 5 contacts with copper sheet interface in the screens of lamp bar interface and links to each other; interface protection plastic jacket 4 is fixed on the fixedly top of plastic parts of interface; fixedly have the screw position on the plastic parts at interface, interface protection plastic jacket 4 and interface fixedly plastic parts are fixed together with screw.LED lamp bar 5 comprises aluminium base LED circuitboard, large-power light-emitting diodes lamp pearl, lamp bar aluminium type bar 6, high transmission rate working of plastics, large-power light-emitting diodes lamp pearl is installed on the aluminium base LED circuitboard, aluminium base LED circuitboard is installed on the lamp bar aluminium type bar 6, the high transmission rate working of plastics covers on outside the aluminium base light emitting diode wiring board 1 and is fixed on the lamp bar aluminium type bar 6, and lamp bar aluminium type bar 6 is fixed on the metal lamp bracket 7 by head end plastic parts and tail end plastic parts.

Referring to Fig. 6, behind at the lamp bar aluminium type bar 6 of LED lamp bar 5 is arranged with the described metal fin of several present embodiments, the two ends of metal fin are welded on the inboard of metal lamp bracket 7 and fix with screw, metal fin is arranged perpendicular to the direction of lamp bar aluminium type bar 6 and with a determining deviation equidistant parallel and is installed in the metal lamp bracket 7, metal fin and lamp bar aluminium type bar 6 constitute network in metal lamp bracket 7, the bottom surface of smooth place, the back side of metab and lamp bar aluminium type bar 6 is close in the metal fin, its groove is corresponding to the interval of lamp bar aluminium type bar 6, thereby be exposed in the outside air, the metal fins 1 in metal fin front is in the air at the light fixture back side.

The fin of present embodiment is an aluminium section bar, and its coefficient of heat conduction is big, and is in light weight.

Heat transmits on fin and mainly comprises aspect following two: 1, heat evenly is delivered on each metal fins rapidly from the metab of fin, because the utility model passes through optimal design, expanded the outward extending space of fin, increased the quantity of metal fins, enlarged the area of dissipation of fin, expanded heat conducting sectional area, (q is a heat output according to Fourier equation q=-k*a*dT/dx, k is the coefficient of heat conduction, for aluminium k=237w/m ℃, dT/dx is a thermograde) its heat output is bigger as can be known, and the heat that can rapidly high-powered LED lamp be produced is evenly derived, and can reduce the PN junction junction temperature significantly; 2, air can be in groove and the free flow of metal fins gap, can form free convection in fluorescent tube space up and down, air can circulate in the fin gap smoothly, especially when lamp applications during in outdoor lighting, this free convection effect is more obvious, mode by free convection, most of heat and air molecule carry out heat exchange, heat is delivered in the air by metal fins, the temperature of entire heat dissipation sheet is reduced, the groove of fin also has rainproof function simultaneously concurrently, and rainwater can flow down from fin by groove, and can not be accumulated on the fin.Fig. 5 and use shown in Figure 6 the temperature of PN junction of high-powered LED lamp of embodiment fin be lower than 55 ℃, prove that this kind fin radiating effect is splendid, long-term service life of using this kind fin can greatly prolong the LED lamp, effectively reduce the decay of high-powered LED lamp, its good performance of heat dissipation can guarantee that the utility model fin is expected to be widely used in various big moving rate LED light fixtures.

The material of fin of the present utility model can adopt the good materials of other thermal conductivity such as aluminum or aluminum alloy or copper.

Fin in the utility model can be made various different sizes, is applied to the fin of various different lightings or other heater members.

Claims

1. fin that can be used for high-powered LED lamp, comprise metab, be connected with the number of metal fin in the front of described metab, metal fins is arranged on the metab, it is characterized in that: the back side at described metab has groove every a segment distance, and groove communicates with the front of metab.

2. the fin that can be used for high-powered LED lamp according to claim 1 is characterized in that: the surface of described metal fins is designed to wavy.

3. the fin that can be used for high-powered LED lamp according to claim 1 and 2 is characterized in that: described metal fins evenly equidistantly is arranged on the metab.

4. the fin that can be used for high-powered LED lamp according to claim 1 and 2 is characterized in that: outermost has the screw position at described metab two ends.

5. the fin that can be used for high-powered LED lamp according to claim 1 and 2 is characterized in that: described metab and metal fins are aluminium matter.

6. the fin that can be used for high-powered LED lamp according to claim 1 and 2 is characterized in that: fin is a strip.