CN202884864U

CN202884864U - Heat radiation structure for LED light fixture

Info

Publication number: CN202884864U
Application number: CN2012205074328U
Authority: CN
Inventors: 廖良斌; 卓元全
Original assignee: XIAMEN GREENER OPTOELECTRONICS CO Ltd
Current assignee: XIAMEN GREENER OPTOELECTRONICS CO Ltd
Priority date: 2012-09-29
Filing date: 2012-09-29
Publication date: 2013-04-17
Anticipated expiration: 2022-09-29

Abstract

The utility model discloses a heat radiation structure for an LED light fixture. The LED light fixture comprises a heat radiation module, a circuit board, and an LED lamp mounted on the circuit board, wherein the heat radiation module comprises a heat radiation plate, heat radiation fins, a heat radiation cover and a fan, wherein the heat radiation plate is connected with the circuit board and provided with a plurality of vent holes, the heat radiation fins are disposed on the heat radiation plate and are composed of a plurality of fins with each fin provided with at least one diversion trench, two adjacent fins are a certain distance away from each other, a bottom end of the heat radiation cover is connected with the heat radiation plate, the heat radiation fins are covered in the heat radiation cover, a top end of the heat radiation cover is provided with a mounting seat, an air inlet is disposed in the center of the mounting seat, and the fan is disposed on the mounting seat on the top end of the heat radiation cover. By using the heat radiation structure for the LED light fixture, cross-ventilation can be accelerated, heat radiation efficiency is raised and heat radiation effects are ensured, thereby raising luminous efficiency of the LED lamp and prolonging service life of the LED lamp.

Description

A kind of radiator structure of LED light fixture

Technical field

The utility model relates to the LED lighting technical field, particularly relates to a kind of LED radiator structure.

Background technology

Light-emitting diodes degree pipe LED (Light Emitting Diode) as new generation of green environment protection solid lighting source, has become the focus that people pay close attention to.It has few, photochromic pure, all solid state, a series of advantages such as quality is light, volume is little, environmental protection of power consumption.Have portion of energy when LED is luminous and be converted into heat, the led chip temperature is raise.And temperature is very big on the service behaviour impact of led chip, and high temperature can cause the photon of chip outgoing to reduce, the colour temperature Quality Down, and it is aging to accelerate chip, shortens the serious consequences such as device lifetime.Therefore for guaranteeing the LED normal operation, the heat that it must be come out distributes timely.At present the great power LED chip application is more and more, and great power LED can only be converted into luminous energy with about 10% ~ 15% input power according to data, and all the other 85% ~ 90% are converted into heat energy, so heat dissipation problem is more severe.

At present LED lighting ubiquity affect the problem of lamp life because of the bad serious light decay that produces that dispels the heat, and especially easilier in the integrated module of LED of high integration use causes heat to be gathered in a large number in the less space and can not distribute rapidly.People are in order to improve the radiating effect of LED lighting, and usually needing increases by a radiator structure at substrate.

Radiator of the prior art adopts the radiating fin group to dispel the heat more, and these a plurality of radiating fin groups are vertical to be located on the heat-conducting plate of light source substrate, and the heat that the LED die holder produces conducts to fins group by heat-conducting plate, and fins group and air carry out taking away heat after the heat exchange.In the heat radiation process, because must could contacting with fins group by heat-conducting plate, air dispels the heat, so that the radiating fin group only can be carried out heat exchange with the part air, heat on the fins group can't spread efficiently and effectively towards periphery, and fins group dense distribution side by side is so that radiating effect is not good or radiating effect is limited yet.

In view of this, the design people is not for attaining perfect many disappearances and the inconvenience that causes in the design of above-mentioned LED radiator structure, and deeply design, and the active research improvement has a fling at and development and Design goes out the utility model.

The utility model content

The purpose of this utility model is to overcome deficiency of the prior art, and a kind of radiator structure of LED light fixture of good heat dissipation effect is provided, and to improve the luminous efficiency of LED lamp, prolongs the service life of LED lamp.

In order to reach above-mentioned purpose, solution of the present utility model is:

A kind of radiator structure of LED light fixture, this LED light fixture comprises heat radiation module, circuit board and is installed in LED lamp on the circuit board, this heat radiation module comprises heat sink, radiating fin, heat dissipating housing and fan, and this heat sink and circuit board link together, and is distributed with a plurality of ventholes on the heat sink; Radiating fin is located on the heat sink, this radiating fin is comprised of a plurality of fins, be equipped with at least one guiding gutter on each fin, all there is certain gap between adjacent two fins, the bottom of heat dissipating housing is connected with heat sink, radiating fin is housed in the heat dissipating housing, and the heat dissipating housing top is provided with a mount pad, and mount pad is provided with an air admission hole; Fan is located on the mount pad on heat dissipating housing top.

Be embedded with heat pipe on the described radiating fin.

Described fan is connected on the mount pad of heat dissipating housing by the mode of buckle.

Described fan is fixed on the mount pad of heat dissipating housing by securing member.

The outer rim of described heat sink forms OneDraw-in groove, the bottom of described heat dissipating housing is provided with flange, and this flange snaps in the draw-in groove of heat sink.

The blade of described fan is over against air admission hole and radiating fin.

This LED light fixture also comprises a lamp housing, and described heat radiation module, circuit board are located in this lamp housing.

Described heat dissipating housing directly is the shell of this LED light fixture.

After adopting said structure, when the utility model LED light fixture is worked, the heat that the LED lamp distributes conducts to radiating fin by heat sink, the air themperature that contacts with radiating fin can rise rapidly, at this time, by fan hot-air and cold air are on every side carried out forced convertion, so that heat is taken away.And the design of heat dissipating housing, fan and heat sink, form the air channel of a shape swirl chamber structure, extraneous cold air is sucked by air admission hole, form Vorticose air-flow by the heat dissipating housing inwall, act on the guiding gutter on the radiating fin, fast the heat on the radiating fin is taken away, discharge hot-air from steam vent, slit between fin and the guiding gutter on the fin can accelerate flowing of air.The effect of fan is the circulation of accelerating air, realize the forced convertion of hot-air and cool exterior air, force to replace radiating fin hot-air on every side with the cold air of outside, reduce radiating fin ambient air temperature, improve radiating efficiency, guarantee radiating effect, and then improve the luminous efficiency of LED lamp, prolong the service life of LED lamp.

Description of drawings

Fig. 1 is schematic perspective view of the present utility model;

Fig. 2 is three-dimensional cutaway view of the present utility model;

Fig. 3 is the three-dimensional cutaway view of the utility model heat radiation module;

Fig. 4 is generalized section of the present utility model.

Label declaration:

LED light fixture 100

Heat radiation module 1

Heat sink 11 air admission holes 111 draw-in grooves 112

Radiating fin 12 fins 121 guiding gutters 122

Heat pipe 123 heat dissipating housings 13 flanges 131

Mount pad 132 steam vents 133

Fan 14 securing members 15

Circuit board 2 LED lamps 3 lamp housings 4.

The specific embodiment

In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.

As shown in Figure 1 to Figure 3, the radiator structure of a kind of LED light fixture of the utility model, this LED light fixture 100 comprise heat radiation module 1, and circuit board 2 is installed in high-powered LED lamp 3 and lamp housing 4 on the circuit board 2.Wherein:

Heat radiation module 1 comprises heat sink 11, radiating fin 12, heat dissipating housing 13 and fan 14.This heat sink 11 welds together with circuit board 2, and circuit board 2 is provided with LED lighting circuit (not using among the figure), is distributed with a plurality of ventholes 111 on the heat sink 11; Radiating fin 12 is located on the heat sink 11, and this radiating fin 12 is comprised of a plurality of fins 121, is equipped with at least one guiding gutter 122 on each fin 121, and all there is certain gap in 121 of adjacent two fins, are embedded with heat pipe 123 on the radiating fin 12; The bottom of heat dissipating housing 13 is connected with heat sink 11, and radiating fin 12 is housed in the heat dissipating housing 13, and in the present embodiment, these heat dissipating housing 13 bottoms are provided with a flange 131, and flange 131 snaps in the draw-in groove 112 of heat sink 11.Heat dissipating housing 13 tops are provided with a mount pad 132, and the center of mount pad 132 is provided with an air admission hole 133; Fan 14 is located on the mount pad 132 on heat dissipating housing 13 tops, it can be connected in by the mode of buckle on the heat dissipating housing 13, perhaps as shown in the figure, by securing member 15 this fan 14 is fixed in the mount pad 132 of heat dissipating housing 13, the blade of fan 14 is over against steam vent 133 and radiating fin 12.

As shown in Figure 4, when 3 work of LED lamp, a large amount of heat that can constantly give out, heat sink 11 is delivered to radiating fin 12 with heat in the mode of conducting with the LED close contact, after heat is passed to fin 121, the air themperature that contacts with fin 121 can rise rapidly, and reach heat pipe 123, and heat pipe 123 has the advantage that heat transfer speed is exceedingly fast, it is embedded in fin 121 can effectively reduce thermal resistance value, increases radiating efficiency, the slit between the fin 121 and the guiding gutter on the fin 122, can accelerate flowing of air, the heat that arrives radiating fin 12 is seen heat off by blowing of fan 14 again.Cold wind sucks from air admission hole 111, forms circinate air-flow by heat dissipating housing 13 inwalls, acts on the guiding gutter 122 on the fin 121, and by blowing fast of heat pipe 123 and fan 14 heat on the radiating fin 12 is taken away, and discharges air from steam vent 133.The effect of fan 14 is circulations of accelerating air, realize the forced convertion of hot-air and cool exterior air, the hot-air with around the outside cold air pressure replacement radiating fin 12 reduces radiating fin 12 ambient air temperature, improve radiating efficiency, guarantee radiating effect.

Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present utility model to its suitable variation or modification of doing.

Claims

1. the radiator structure of a LED light fixture, this LED light fixture comprises heat radiation module, circuit board and is installed in LED lamp on the circuit board, it is characterized in that: this heat radiation module comprises heat sink, radiating fin, heat dissipating housing and fan, this heat sink and circuit board link together, and are distributed with a plurality of ventholes on the heat sink; Radiating fin is located on the heat sink, this radiating fin is comprised of a plurality of fins, be equipped with at least one guiding gutter on each fin, all there is certain gap between adjacent two fins, the bottom of heat dissipating housing is connected with heat sink, radiating fin is housed in the heat dissipating housing, and the heat dissipating housing top is provided with a mount pad, and mount pad is provided with an air admission hole; Fan is located on the mount pad on heat dissipating housing top.

2. the radiator structure of a kind of LED light fixture as claimed in claim 1 is characterized in that: be embedded with heat pipe on the described radiating fin.

3. the radiator structure of a kind of LED light fixture as claimed in claim 1, it is characterized in that: described fan is connected on the mount pad of heat dissipating housing by the mode of buckle.

4. the radiator structure of a kind of LED light fixture as claimed in claim 1, it is characterized in that: described fan is fixed on the mount pad of heat dissipating housing by securing member.

5. the radiator structure of a kind of LED light fixture as claimed in claim 1 is characterized in that: the outer rim formation of described heat sink OneDraw-in groove, the bottom of described heat dissipating housing is provided with flange, and this flange snaps in the draw-in groove of heat sink.

6. the radiator structure of a kind of LED light fixture as claimed in claim 1, it is characterized in that: the blade of described fan is over against air admission hole and radiating fin.

7. such as the radiator structure of the described a kind of LED light fixture of any one in the claim 1 to 6, it is characterized in that: this LED light fixture also comprises a lamp housing, and described heat radiation module, circuit board are located in this lamp housing.

8. such as the radiator structure of the described a kind of LED light fixture of any one in the claim 1 to 6, it is characterized in that: described heat dissipating housing directly is the shell of this LED light fixture.