CN201539718U

CN201539718U - LED lamp core and LED illumination lamp

Info

Publication number: CN201539718U
Application number: CN2009201340325U
Authority: CN
Inventors: 秦彪
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-23
Filing date: 2009-07-23
Publication date: 2010-08-04
Anticipated expiration: 2019-07-23

Abstract

The utility model provides an LED lamp core and an LED illumination lamp to resolve LED radiating problems. The LED illumination lamp adopts sunflower type radiating fins, a heat conducting core (4) and an LED (1) are combined to form the LED lamp core which is an independent component, thereby bringing convenience for internal package of the lamp core and assembly of the total lamp and realizing standard generalization of components of the LED illumination lamp. By aid of a cone and thread implanted radiating fin structure, the problem of thermal contact resistance among the heat conducting core (4) and the radiating fins is resolved and the LED lamp is convenient to be maintained. By utilizing a chimney suction principle, a convection hood (8) additionally arranged on the LED illumination lamp can increase heat dissipation capacity of the LED illumination lamp and effectively reduce cost thereof.

Description

A kind of LED wick and LED illuminating lamp thereof

Affiliated technical field

The utility model belongs to the LED lighting technical field, specially refers to the LED illuminating lamp that adopts sunflower radiating rib.

Technical background

LED illumination, energy-conservation because of it, long-life and be subjected to the whole world and pay close attention to, be considered to lighting engineering of future generation.But its heat dissipation problem is current LED lighting engineering developing one big obstacle, and accounts for LED illuminating lamp considerable part cost, and restriction LED illumination popularization and application is exactly the cost price height of whole lamp.The heat abstractor of current LED illuminating lamp, just of a great variety with regard to its structure, general problem is that version is unreasonable, is difficult for changing, and can not form the universal standard, cost height, radiating effect are also undesirable.

Summary of the invention

The LED illuminating lamp that the utility model proposes is at heat dissipation problem, and the parts universal standardization proposes a kind of scheme: effectively improve heat dissipation capacity, reduce heat transmission aluminium weight, manufacturing process is simple, is convenient to whole lamp assembling, realizes the parts universal standardization in the LED illuminating lamp.

The technical solution of the utility model is: LED illuminating lamp critical piece includes: sun fancy structure fin and LED wick, the LED wick includes: LED core and heat conduction core, the LED core is arranged on the heat conduction core, when being used for the LED illuminating lamp, in the implanted sun fancy of the heat conduction core structure fin.Feature of the present utility model is: heat conduction core has adopted conical structure, or threaded stud structure.

Sun fancy structure fin, owing to can adopt aluminium extrusion explained hereafter heronsbill section bar, its low cost of manufacture, thereby be used to widely in the computer CPU heat sink, also there are many LED illuminating lamps to adopt this fin.

Sun fancy heat radiating fin structure: the center is a heating column, fin stretches out round heating column, heat is exactly by the fin surface, pass in the air and shed by convection current (adopting free convection usually) process, convective heat-transfer coefficient little (particularly free convection), thereby to increase the fin area of dissipation as far as possible, the heronsbill structure then can effectively be provided with maximum fins in certain space.LED core (pyrotoxin just) is arranged on the section of heating column, and pyrotoxin is short to the distance of fin root, and then thermal conduction resistance is low, helps heat radiation.More than heat radiation is a rational structure the most to explanation sun fancy fin for the LED core.

The LED core is arranged on the heat conduction core, and heat conduction core is implanted in the fin, and heat conduction core is the part in the heating column, and the heat that the LED core produces is transmitted on the fin through heat conduction core again, and LED core and heat conduction core just can constitute separate part---the LED wick.Adopt such structural advantages to have: one, to be convenient to the encapsulation and the assembling of LED core and heat conduction core, to be convenient to solve the heat conduction problem in it; Two, be convenient to the assembling of whole LED illuminating lamp; Three, be convenient to the maintenance and the replacing of LED wick; Four, the more important thing is and be convenient to realize standardization.

For solving the thermal contact resistance problem between heat conduction core and the fin (heating column).The utility model proposes: heat conduction core has adopted conical structure, or threaded stud structure.Heat conduction core adopts taper to implant structure in the fin, as long as little pushing force, just can obtain being exaggerated the pressure that contacts between tens of times heat conduction core cylinder and the fin, thereby thermal contact resistance just is reduced.Conical bore and the easy machine-shaping of circular cone cylinder, quality of fit guarantee easily, thereby select the heat conduction core of conical structure.Heat conduction core adopts the structure in the screw thread implantation fin, because the surface area of screw thread cylinder is exaggerated, the transmission of heat by contact area just is exaggerated, and thermal contact resistance just reduces, and such as adopting 60 ° of common trigonodont screw threads, its surface area is the twice of cylinder.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is that a kind of outward flange is the sun fancy fin feature schematic diagram of rectangle.

Fig. 2 is that a kind of outward flange is hexagonal sun fancy fin feature schematic diagram.

Fig. 3 is that a kind of outward flange is circle, and fin is the sun fancy fin feature schematic diagram of arc.

Fig. 4 is a kind of feature structure schematic diagram of LED illuminating lamp of the present utility model, and the heat conduction core of LED wick is conical the implantation in the fin.

Fig. 5 is a kind of feature structure schematic diagram of LED illuminating lamp of the present utility model, and the heat conduction core of LED wick is that screw thread is implanted in the fin, and the LED core is provided with the wick cover.

Fig. 6 is a kind of feature structure schematic diagram of LED wick of the present utility model, and heat conduction core is the tapered tread structure, and band wick cover.

Fig. 7 is a kind of feature structure schematic diagram of LED illuminating lamp of the present utility model, and the top of fin is provided with convective cover, and heat conduction core is the tapered tread structure.

Fig. 8 is a kind of feature structure schematic diagram of LED illuminating lamp of the present utility model, and the top of fin is provided with convective cover, and the LED core is at the upside of fin, and heat conduction core is conical the implantation in the fin.

Fig. 9 is a kind of feature structure schematic diagram of LED illuminating lamp of the present utility model, and the LED core is provided with speculum at the upside of fin in the convective cover, can be to level irradiation all around.

Figure 10 is a kind of feature structure schematic diagram of LED illuminating lamp of the present utility model, is provided with speculum in the convective cover, but folk prescription shine to level, the convective cover sidewall upper has exhausting window.

Figure 11 is a kind of feature structure schematic diagram of LED illuminating lamp of the present utility model, and convective cover is scalable, and the LED core is provided with the wick cover.

Figure 12 is a kind of feature structure schematic diagram of fin of LED illuminating lamp employing of the present utility model, is pieced together by several hollow sunflower radiating ribs, is the honeycombed structure.

Figure 13 is a kind of feature structure schematic diagram of LED illuminating lamp of the present utility model, and fin has adopted favose amalgamation structure, can be used for road lighting.

Among the figure, arrow 11. screws 12. speculums 13. exhausting windows 14. of 1.LED core 2. heating columns 3. fins 4. heat conduction core 5. screw rods 6. wick covers 7. front lens 8. convective covers 9. convection current chambeies 10. expression light drive electrical equipment 15. nuts 16. electrodes

Embodiment

Fig. 1,2,3 shows the feature schematic diagram of three kinds of sun fancy fin respectively.Their architectural features (heronsbill architectural feature just), the center is that heating column 2 (has solid and hollow branch, be solid among the figure), fin 3 stretches out from the cylinder of heating column 2, the effect of heating column by the end face (also can claim cross section) of the heating column mode with heat conduction, is passed to the heat of LED core on the fin on the cylinder.The advantage of heronsbill structure: thermal conduction portions (being heating column) volume is little, and thermally conductive pathways is short, and the area of dissipation of fin is big.

Fig. 4,5 illustrates the feature structure of two kinds of typical the utility model LED illuminating lamps, heat conduction core 4 is arranged in the heating column, LED core 1 is arranged on the heat conduction core 4, heat conduction core 4 is implanted in the fin, heat conduction core is the part in the heating column, the heat that LED core 1 produces is transmitted on the fin through heat conduction core 4 again, and LED core 1 and heat conduction core 4 just constitute separate part---the LED wick.

Among Fig. 4, heat conduction core 4 is conical, and screw rod 5 is arranged on central shaft, is fixed on the fin, makes in the fastening implantation fin of heat conduction core by the rotating heat conducting core.

Fig. 5 illustrates heat conduction core 4 and adopts threaded stud structure, the structure that heat conduction core adopts screw thread to implant in the fin also has an advantage: be convenient to install, can just heat conduction core can be implanted in the fin by tool free, in the light fixture that constitutes by fin etc. of just the LED wick being packed into.

LED core 1 among Fig. 5 is equipped with wick cover 6, and wick cover 6 inner surfaces can be used as reflective mirror, also is provided with front lens 7 before the LED core 1, and wick cover 6 and front lens 7 are being protected this LED core 1.For the LED illuminating lamp of outdoor use, note preventing the rainwater front lens of flowing through for a long time, reduce front lens surface and generate incrustation scale, the wick cover should be designed to its lower limb or the lower limb projection should be lower than front lens.Front lens 7 concavities among Fig. 5 make the lower limb of wick cover 6 be lower than front lens 7.Such structure makes that water all flows down from the lower limb of wick cover when raining, and the current that do not rain are through front lens.

Fig. 6 shows a kind of LED wick of the present utility model, has wick cover 6, and heat conduction core 4 has adopted the tapered tread structure, thereby has the advantage sum that conical structure and helicitic texture are had: it is big to contact pressure, and contact area is big, is convenient to install.

The profile of fin can be a rectangle, polygon, circle etc., the appearance and size of fin is represented with the equivalent external diameter, the equivalent external diameter is defined as fin profile girth divided by ∏ (∏=3.14), if when the fin profile is circular, its equivalent external diameter just equals its profile diameter of a circle.Equally, the equivalent external diameter of heating column is defined as heating column cross-sectional profile girth divided by ∏.The height of fin, shown in Fig. 4,5 fin 3 vertical cubes to size, it is thick also can be called fin.The thickness of size, fin height and the fin of the appearance and size of fin (equivalent external diameter), heating column and the gap between the fin, will consider multiple factor when determining these sizes of representing heat radiating fin structure: heating column is excessive, institute takes up space big, the aluminium consumption is also big, inner heat conduction distance also may extend, the equivalent external diameter of heating column should be not more than 35mm, heating column should be as far as possible little, but can not be too little, consider the fixing of LED wick and between thermal contact resistance, heating column equivalent external diameter should be less than 10mm; If the external diameter of fin is too big, will cause increasing the length of the external diameter and the fin of heating column, fin length long (greater than 35mm time), and the extrusion molding difficulty, the equivalent external diameter of fin should be greater than 100mm; From heat transfer theory, gap between the fin little (less than 1mm), but consider the pollution problem of extrusion molding difficulty and long-time dust, mean gap between the fin is (because the gap is inhomogeneous, thereby be averaged the gap) be not less than 1.0mm, if the gap is too big, then space availability ratio is low, and the mean gap between the fin should be greater than 3.5mm; The thickness of fin should be thin as far as possible, but the extrusion molding difficulty, it is more suitable about 0.6mm being averaged thickness.The height of fin should not surpass 35mm, is because the fin height is represented the flow through distance of fin of air, too high fin, then air flow resistance is big, and the heat conduction distance in the heating column is also long, but the fin height is too little, area of dissipation is just little, should be less than 6mm.

Fig. 7,8 illustrates the feature structure of two kinds of the utility model LED illuminating lamps.LED core 1 among Fig. 7 is arranged on the downside of fin down, and the LED core 1 among Fig. 8 is located at the upside of fin up, but their common characteristic are provided with convective cover 8 above fin, form cavity above fin, become convection current chamber 9.

The free convection heat transfer process: after air was heated, proportion descended, and produced lift, and upwards the convection heat transfer' heat-transfer by convection process that flows does not have mechanical motion, thereby the reliability height, and cost is also low.Convective cover is set above fin, utilizes chimney suction principle, improve the flow through flow of fin of air, obtain the raising of heat dissipation capacity.Dischargeable capacity in the suction intensity of convective cover and the convective cover is directly proportional, and apparent size shows with the height (height that just refers to convection current chamber 9) of convective cover and is directly proportional.Convective cover will reach more than the fin height twice, just has tangible heat radiation to improve effect.According to experiment, when the convective cover height was high 6 times of fin, its heat dissipation capacity can improve 50%.Be a cavity in the convective cover, shell can utilize plastics to make, and convective cover can be integrated with light fixture, thereby cost do not increase, and the volume increase of whole lamp is also limited.This explanation adds the heat dissipation capacity that convective cover effectively raises fin, from another angle, has reduced the shared cost that dispels the heat.

When fin keeps flat, convective cover is erect when being provided with, and the swabbing action of convective cover is the most effective, but the LED core only faces upward or downward.The utility model LED illuminating lamp shown in Fig. 9,10, just solved light flat fire problem, LED core 1 is arranged on the upside of fin, LED core 1 is provided with speculum 12 up in the convective cover 8, the sidewall of convective cover 8 has adopted transparent material to make, from LED core 1 send towards glazed thread, be reflected into flat fire through speculum 12,, then just can transfer the flat fire angle (on the upper side or on the lower side) of illuminating lamp if the adjustable angle of the speculum 12 in the convective cover 8 is moving.LED illuminating lamp shown in Figure 10 is one-sided flat fire, and shown in Figure 9 be both sides, or flat fire all around.Among Figure 10, be added with lid on the convective cover 8, have exhausting window 13. in sidewall upper

Fig. 8,9,10 heat conduction core 4 adopt conical structure, and by rotary screw 11, in heat conduction core 4 fastening implantation fin, screw is arranged on the central axis, can certainly adopt on the heat conduction core next door many fastening implant infrastructures of screw are set.

In of the present utility model a kind of LED illuminating lamp shown in Figure 11, the driving electrical equipment 14 of LED core 1 is arranged in the convective cover 8, though such design driving electrical equipment 14 has reduced the volume in the convection current chamber 9, but the heater members that drives electrical equipment 14 will improve the air themperature in the convection current chamber 9, and helping convective cover increases swabbing action.Convective cover 8 among Figure 11 is designed to two sections, and epimere may compress in the hypomere, and promptly the adjustable height of convective cover is moving.Such design, help the installation of lamp, increase convective cover as much as possible, such as, earlier convective cover is shunk, the lamp holder of LED illuminating lamp is exposed, after the insertion lamp socket is fixing, stretch convective cover again, this just effectively utilizes the space around lamp holder and the lamp socket, strengthen convective cover, improve swabbing action, promptly improve heat dissipation capacity.Also flexible convective cover setting can be fixed on the lamp socket.

The lower limb projection of the wick cover 6 shown in Figure 11 is lower than front lens; Heat conduction core 4 adopts conical structure, the top section of the having screw buckle of heat conduction core 4, and nut 15 is fixed on the fin, makes in the fastening implantation fin of heat conduction core by the rotating LED wick, and nut 15 also can be structure as a whole with heating column.The structure of three kinds of fastening implantation fin of conical heat conduction core shown in Fig. 4,8,9,10,11 all is by the rotation screw buckle, produces pushing force, thereby is commonly referred to as the fastening implantation heat radiating fin structure of screw buckle.

The LED wick can adopt cable to draw connected mode with being connected of electricity in the light fixture, and promptly the LED wick has two outgoing cable lines.Also can adopt be similar to shown in Figure 11, there are two electrodes 16 top that the heat conduction core 4 of LED wick is stretched out, drive electrical equipment 14 corresponding electrode is also arranged, realize the connection of electricity by the contact of two-phase counter electrode, one in the two corresponding electrodes should be adopted elastic electrode, and promptly two corresponding electrodes are Elastic Contact.

The heat dissipation capacity of single sunflower radiating rib is limited, and the power (being illuminance) of corresponding single led core is also just limited, for this class high-power illumination lamp of picture street lamp, can adopt similar scheme shown in Figure 12.Adopt many sun of number fancy fin to piece together one by jockey or interconnection mechanism, each sunflower radiating rib has the LED core, and this just can piece together the illuminating lamp of multiple illuminance (power) as required.Hexagonal external feature such as single sun fancy fin shown in Figure 12 is, entire heat dissipation sheet amalgamation structure is the honeycomb type structure, this compact conformation, firmly, be convenient to amalgamation, be convenient to be connected to each other between each fin.

Figure 13 shows a kind of employing street lamp of the present utility model, and fin is 10 and waits hexagon sun fancy fin, adopts the honeycomb type structure to piece together.Heat conduction core 4 has adopted the tapered tread structure, and each LED core 1 has wick cover 6 and front lens 7, front lens 7 concavities, and the rear casing projection of lamp has constituted convective cover 8, and internal cavity is exactly convection current chamber 9, and top cover has the exhausting window of being made up of the many apertures of number 13.

Specify: the LED core in the utility model has comprised the OLED core

Claims

1. LED wick that is used to throw light on, include: LED core (1) and heat conduction core (4), LED core (1) are arranged on the heat conduction core (4), when being used for the LED illuminating lamp, in the implanted sun fancy of heat conduction core (4) the structure fin, it is characterized in that: heat conduction core (4) has adopted conical structure or threaded stud structure.

2. LED wick according to claim 1 is characterized in that: heat conduction core (4) has adopted the tapered tread structure.

3. LED wick according to claim 1 is characterized in that: LED core (1) is provided with wick cover (6), and wick cover (6) lower limb or lower limb protrude the front lens (7) of low LED core.

4. one kind has been adopted the LED illuminating lamp according to claim 1 or 2 or 3 described LED wicks, include: LED wick and fin, fin has adopted sun fancy structure, it is characterized in that: the height of fin is no more than 35mm, the equivalent external diameter of fin is not more than 100mm, the equivalent external diameter of heating column (2) is not more than 35mm, and the mean gap between the fin is no less than 1.0mm, is not more than 3.5mm.

5. LED illuminating lamp according to claim 4 is characterized in that: conical heat conduction core (4) has adopted the fastening implantation heat radiating fin structure of screw buckle.

6. LED illuminating lamp according to claim 4 is characterized in that: the LED illuminating lamp has adopted the sun fancy fin of a plurality of band of number LED wick, and they piece together integrative-structure by jockey or interconnection structure.

7. LED illuminating lamp according to claim 6 is characterized in that: the honeycombed structure has been adopted in the fin amalgamation.

8. LED illuminating lamp according to claim 4 is characterized in that: be provided with convective cover (8) above fin, the height of convective cover (8) is more than the twice of fin height.

9. LED illuminating lamp according to claim 8 is characterized in that: LED core (1) is arranged on the upside of fin, LED core (1) up, convective cover (8) sidewall has adopted transparent material to make, and is provided with speculum (12) in the convective cover (8).

10. LED illuminating lamp according to claim 8 is characterized in that: the height of convective cover (8) has adopted the adjustable height structure.