CN202405979U

CN202405979U - LED lamp radiator

Info

Publication number: CN202405979U
Application number: CN2011205465223U
Authority: CN
Inventors: 刘晓东; 王子杰
Original assignee: State Energy Research (beijing) Steady-State Heat And Mass Transfer Technology Research Institute Co Ltd
Current assignee: State Energy Research (beijing) Steady-State Heat And Mass Transfer Technology Research Institute Co Ltd
Priority date: 2011-12-23
Filing date: 2011-12-23
Publication date: 2012-08-29
Anticipated expiration: 2021-12-23

Abstract

The utility model discloses a LED (light-emitting diode) lamp radiator, which mainly solves the problem that the conventional radiator has low heat transfer efficiency. The LED lamp radiator comprises a V-shaped shell with fins, wherein the V-shaped shell is used for fixing LED lamps; one lateral surface of the V-shaped shell opposite to the side with the fins is provided with a groove; and an aluminum uniform temperature chamber is formed in the groove. According to the LED lamp radiator, the aluminum uniform temperature chamber is formed in the V-shaped shell, the temperature is uniformly distributed, particularly the surface temperature of the fins is more uniformly distributed compared with that of aluminum fins welded on a uniform temperature plate, and the heat exchange efficiency of the fins is greatly improved.

Description

A kind of LED lamp radiator

Technical field

The utility model relates to a kind of radiator, is specifically related to a kind of LED lamp radiator.

Background technology

The heat radiation of LED is more and more paid attention to by people now, and this is that the bad junction temperature of dispelling the heat will raise because the light decay of LED or its life-span are directly relevant with its junction temperature, and the life-span can shorten, and 10 ℃ of life-spans of the every reduction of temperature can prolong 2 times.The life-span of its light decay to 70% could be up to 100,000 hours so if junction temperature can be controlled at 65 ℃! Junction temperature not only influences the long-time life-span, yet directly influences the luminous efficiency of short time, and the heating of LED can make that also its spectrum moves in addition; Colour temperature raises; Forward current increases (during the constant voltage power supply); Reverse current also increases; Thermal stress increases; The aging acceleration of fluorescent material epoxy resin or the like variety of problems, thus, the heat radiation of LED will reduce the junction temperature of LED own exactly.Therefore low like surface temperature, but heat transfer resistance is high, the LED junction temperature surpasses reasonable value, and radiator structure is also failed, and is high like surface temperature, but heat transfer resistance is low, and the junction temperature temperature keeps in the reasonable scope, also is acceptable.Therefore want good heat dissipation, just need to reduce thermal resistance from node to ring temperature (Rj-a).And LED transmits with iso mode in the heat biography, and direction of transfer can roughly be distinguished and be the vertical and horizontal direction; Vertical direction is equivalent to the thermal resistance series connection; Its transmission shows as like Fig. 1; Heat transferred to the metal substrate 14 that led light source 15 chips send; Weld layer (scolder 13) through metal substrate 14 and aluminium base 12 is passed to metal substrate, and the heat-conducting glue 11 through filling between aluminium base and aluminium base and the fin is passed to fin 10; And carry out exchange heat through fin 10 and cross-ventilation; Heat dissipation is gone out, and its thermal resistance form of expression is: transmit entire thermal resistance=chip to metal substrate thermal resistance+metal substrate aluminium base thermal resistance+aluminium base to aluminium radiator fin thermal resistance+aluminium radiator fin to the environment thermal resistance, the heat-conducting layer that relates to has metal substrate, solder layer, aluminium base flaggy, heat conduction glue-line and aluminium radiator layer.As shown in Figure 1, serial number is many more, and thermal resistance is big more; The level transmission equals parallelly connected thermal resistance, and parallelly connected thermal resistance is many more, and thermal resistance is low more.Therefore reducing thermal resistance need be considered by two aspects: need under the condition of the reasonable thermal capacitance structure that guarantees each assembly self; Reduce thermal resistance, the heat transfer area of increase, or increase horizontal capacity of heat transmission; The heat that LED point zone is discharged spreads apart fast and effectively; Thereby promote the heat exchanger effectiveness of fin, on heat loss through conduction, reduced the conduction number of plies, the heat that chip is produced can more directly be passed to fin.

Summary of the invention

The main purpose of the utility model is to provide a kind of LED lamp radiator, and it mainly solves the low problem of existing radiator heat transfer efficiency.

The utility model provides a kind of LED lamp radiator, and described radiator casing is the V-shape housing.

Wherein, said V-shape housing one side band radiating fin;

The side that described V-shape housing is opposite with its band radiating fin has groove;

Be shaped on the equal greenhouse of aluminium in the described groove.

Preferably, the equal greenhouse of said aluminium comprises:

Be fastened on the cover plate on the said groove;

Be arranged on the aluminum foam layer of said cover plate over against groove one side; And

The steam cavity that surrounds by said aluminum foam layer and said groove.

Preferably, be marked with the working medium that is used for phase-change heat transfer in the said steam cavity.

In addition, also be provided with the support guide convexity on the described aluminum foam layer.

Preferably, described support guide convexity is rectangular structure.

Wherein, described groove edge is provided with step;

Described cover plate is fastened on the said step.

In addition, the side that said cover plate and groove are opposite is for solidifying said LED lamp end face.

Preferably, described working medium is 141B solvent or acetone or ethylene glycol.

Compared with prior art, the beneficial effect of the utility model is:

1, this practicality newly through the equal greenhouse of aluminium is set, makes uniformity of temperature profile on the V-shape housing, particularly Lie sheet surface temperature compare temperature-uniforming plate welding of aluminum radiating fin structure distribution more evenly, Lie sheet heat exchanger effectiveness significantly promotes.

Description of drawings

Fig. 1 is the cutaway view of the LED lamp of existing band radiator;

Fig. 2 is the structural representation of the V-shape housing of the utility model band radiating fin;

Fig. 3 is the structure of cover plate sketch map of the utility model band aluminum foam layer;

Fig. 4 is the structural representation of the utility model;

Fig. 5 is the concrete structure cutaway view of using of the utility model;

Fig. 6 is the partial enlarged drawing of A part among Fig. 5;

Fig. 7 is the concrete stereogram of using of the utility model.

Description of reference numerals among the figure: 10, fin; 11, heat-conducting glue; 12, aluminium base; 13, scolder; 14, metal substrate; 15, led light source; 2, V-shape housing; 21, groove; 3, cover plate; 31, aluminum foam layer; 32, support guide is protruding; 33, steam cavity; 4, radiating fin; 5, LED lamp.

Embodiment

Be elaborated below in conjunction with the preferred embodiment of accompanying drawing, should be appreciated that following illustrated preferred embodiment only is used for explanation and explains the utility model, and be not used in qualification the utility model the utility model.

The utility model provides a kind of LED lamp radiator, and like Fig. 2 and shown in Figure 5, radiator is an aluminum material, and radiator casing is a V-shape housing 2.V-shape housing 2 one side band radiating fins 4; V-shape housing 2 has groove 21 with its band radiating fin 4 opposite sides; Be shaped on the equal greenhouse of aluminium in the groove 21.

Wherein, like Fig. 5, Fig. 6 and shown in Figure 7, the equal greenhouse of aluminium comprises: be fastened on the cover plate 3 on the said groove 21; Be arranged on the aluminum foam layer 31 of said cover plate 3 over against groove 21 1 sides; And the steam cavity 33 that surrounds by said aluminum foam layer 31 and said groove 21.

In addition, be marked with the working medium that is used for phase-change heat transfer in the said steam cavity 33.Working medium is 141B solvent or acetone or ethylene glycol.

Wherein, as shown in Figure 3, also be provided with support guide protruding 32 on the aluminum foam layer 31.Support guide protruding 32 is rectangular structure.Like Fig. 2 and shown in Figure 4, groove 21 edges are provided with step 22; Cover plate 3 is fastened on the said step 22.Like Fig. 5 and shown in Figure 6, cover plate 2 is said LED lamp 5 end faces of curing with groove 21 opposite sides.

The manufacture process of the utility model does; Its structure of New-type phase change V-shape radiating fin is to utilize aluminium extruded to extrude aluminium alloy as shown in Figure 2 (material 6063); And go out to have the Al-alloy casing (V-shape housing) of heat radiation Lie sheet 4 through the NC processing and fabricating, have samming chamber body and cover plate 3 sealed step.(as shown in Figure 3 with cover plate 3 afterwards; The stamping forming aluminum composite plate of aluminum foam; The bossing of foam surface can reach the effect of supporting temperature-uniforming plate cavity and steam void water conservancy diversion) assembling fastens to together like Fig. 4; In assembling process, control the fit clearance of housing and housing welding between the slit well, be generally less than 0.08mm.And through the sealing welding, it is whole to make it to become sealing.

The aluminum enclosure of sealing welding is vacuumized (＜1.3 * 10 through process duct ^-2～5.0 * 10 ^-3Pa), according to the working medium of product design demand injection respective amount, and the sealing welding technique for extra pipe.Be made into the V-shape phase transformation temperature-uniforming plate that has the Lie chip architecture.

Afterwards LED lamp 5 is directly fixed in V-shape temperature-uniforming plate both sides lower shell surface such as Fig. 5, Fig. 6 and shown in Figure 7; Thereby reduced the vertical conduction number of plies of heat that led light source produces; Effectively reduce the vertical conduction thermal resistance; And heat that LED produces can evenly spread apart rapidly along the XY direction through the aluminium temperature-uniforming plate, and along Z to upwards being passed to radiating fin, thereby promote the heat exchanger effectiveness of aluminium heat radiation Lie sheet greatly.

The application of New-type phase change V-shape radiating fin in the LED illumination has the following advantages:

1. the adding of phase change layer makes light source can be arranged in the optional position of base plate, and the design of light fixture is more flexible.

2. the adding of phase change layer makes two light sources to abut against influences heat radiation together and not, avoids light fixture to produce ghost image, and the recessiveness that promotes light fixture is worth.

3. the adding of phase change layer makes light fixture can use the light source of single only high wattage and can not cause dispelling the heat a difficult problem, makes lamp light source quantity reduce designs simplification.

Distribution of light sources in the module both sides at an angle, the deviation angle of light reduces under the same illumination face, luminaire efficiency improves about 10%.

5 distribution of light sources at an angle to the both sides irradiation, make the uniformity of illuminance on road surface improve 20% in the module both sides.

6. incorporate design makes the classification of waterproof of light fixture be easy to reach IP65.

7. designs simplification can improve reliability of products and stability, dwindles the difference between the product.

8. because the high efficiency of V-shape radiator can suitably be dwindled the radiating fin volume, thereby effectively reduce heatsink weight.

Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection range of the utility model.

Claims

1. a LED lamp radiator is characterized in that, described radiator casing is V-shape housing (2).

2. LED lamp radiator according to claim 1 is characterized in that,

Said V-shape housing (2) one side band radiating fins (4);

The side that described V-shape housing (2) is opposite with its band radiating fin (4) has groove (21);

Be shaped on the equal greenhouse of aluminium in the described groove (21).

3. LED lamp radiator according to claim 2 is characterized in that, the equal greenhouse of said aluminium comprises:

Be fastened on the cover plate (3) on the said groove (21);

Be arranged on the aluminum foam layer (31) of said cover plate (3) over against groove (21) one sides; And

The steam cavity (33) that surrounds by said aluminum foam layer (31) and said groove (21).

4. LED lamp radiator according to claim 3 is characterized in that, is marked with the working medium that is used for phase-change heat transfer in the said steam cavity (33).

5. LED lamp radiator according to claim 3 is characterized in that, also is provided with support guide convexity (32) on the described aluminum foam layer (31).

6. LED lamp radiator according to claim 5 is characterized in that, described support guide protruding (32) is rectangular structure.

7. LED lamp radiator according to claim 3 is characterized in that, described groove (21) edge is provided with step (22);

Described cover plate (3) is fastened on the said step (22).

8. LED lamp radiator according to claim 7 is characterized in that, the side that said cover plate (3) is opposite with groove (21) is curing said LED lamp (15) end face.

9. LED lamp radiator according to claim 4 is characterized in that,

Described working medium is 141B solvent or acetone or ethylene glycol.