CN101275734B

CN101275734B - High-power LED heat radiating device

Info

Publication number: CN101275734B
Application number: CN2008100370501A
Authority: CN
Inventors: 鲁祥友; 刘美静; 程远霞; 华泽钊
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2008-05-07
Filing date: 2008-05-07
Publication date: 2011-05-04
Anticipated expiration: 2028-05-07
Also published as: CN101275734A

Abstract

The invention relates to a high power LED heat sink, characterized by including a high power LED, an evaporator, a circulator, a condensator, a condensator, a reservoir, the evaporator is in plat shape, the wall of which is directly welded with the high power LED, and the evaporator, the condensator and the reservoir are connected in turn through the circulator. The circulator part passing through the reservoir and extending into the inside of the plat type evaporator is provided with small holes at the pipe wall convenient for the working substance fluid reflowing to the capillary structure silk net in the evaporator as soon as possible; the inside of the plat type evaporator and the reservoir is tiled with the silk net with capillary structure. The gap between the plat type evaporator and the reservoir is blocked by the vapor baffle which can effectively prevent the vapor in the evaporator entering the reservoir. The invention has the characteristic of high heat emission effect, good temperature equalization performance, compact conformation, convenient process, small thermal resistance, light weight, low cost etc, which can effectively solve the heat emission problems of the high power LED.

Description

A kind of high-power LED heat radiating device

Technical field

The present invention relates to the heat abstractor of a kind of electronics and optical component, the heat abstractor of particularly a kind of great power LED (light emitting diode, light emitting diode).

Background technology

The heat flow density of the chip of the great power LED of making that is used to throw light on has surpassed 100W/CM at present ², the heat of great power LED can be distributed in time, too high with the temperature rise that prevents LED, be that LED device packages and devices is used the key problem that must solve emphatically.At present, the method that generally adopts is by improving LED baseplate material, encapsulating structure, with improving the heat dissipation problem that heat conducting method solves LED both at home and abroad.But for the great power LED that is used to occasions such as throwing light on, this method is difficult to take effect.Simultaneously, for illuminating great power LED, the cost of its cooling segment can not be very high, and size does not allow excessive, can not allow in modes such as electric fans yet and come enhance heat.In addition, when the thermo-contact thermal resistance of heat sink and device etc., after a certain scope, further reduce and to cause increasing considerably of cost.Therefore, the cooling means of existing heat conduction can not solve the heat dissipation problem of great power LED.

An important directions of the solution great power LED cooling that the hot pipe technique that utilizes phase-change heat transfer is.When being used to throw light on, general heat pipe has run into problem.Because vapour-liquid is same ducted in traditional heat pipe,, will cause the sharp fall of cooling effectiveness if heat pipe is bent.But for satisfying the moulding needs, the heat pipe of illuminative high-power LED must be bent, so traditional heat pipe can not solve the heat dissipation problem of great power LED effectively.

Existing loop heat pipe (a kind of unpowered enclosed phase-change heat transfer equipment, form by five parts of evaporimeter, jet chimney, condenser, back liquid pipeline, reservoir) technology is a kind of advanced person's phase transformation cooling technology, it is the main direction of electronic chip high heat flux cooling, but, existing loop heat pipe technology directly be applied in run in the heat radiation of great power LED that manufacturing cost height, processing are inconvenient, heat dissipation design can not satisfy moulding demand, capillary structure too complexity be difficult to shortcomings such as manufacturing, be unfavorable for the marketization of great power LED product.

Summary of the invention

The present invention be directed to the state of great power LED cooling problem shortage effective workaround, proposed a kind of heat abstractor of great power LED.It has that radiating efficiency height, heat dissipation design can satisfy that moulding demand, uniform temperature are good, compact conformation, easy to process, thermal resistance is little, in light weight, characteristics such as cost is low, energy-saving effect is remarkable.

Technical scheme of the present invention is: a kind of high-power LED heat radiating device, it is characterized in that, it comprises great power LED, evaporimeter, circulation pipe, condenser, reservoir, evaporimeter is a tabular, direct and the great power LED welding of the wall of evaporimeter, evaporimeter, condenser and reservoir are connected successively by circulation pipe.

All tile the silk screen of capillary structure the inner and described reservoir inside of described tabular evaporimeter; Evaporimeter capillary structure silk screen inner and reservoir inside is connected as a single entity.

Described circulation pipe connects evaporimeter, condenser and reservoir successively, passes backflow pipeline section part that reservoir extend into plate evaporator inside and has several at its tube wall and be convenient to worker quality liquid and be back to aperture on the capillary structure silk screen in the evaporimeter as early as possible.

The steam baffle plate of scurrying into reservoir with the steam in the device of can avoiding evaporating effectively between described plate evaporator and the reservoir is kept apart.

Beneficial effect of the present invention is: radiating efficiency height of the present invention, heat dissipation design can satisfy that moulding demand, uniform temperature are good, compact conformation, easy to process, thermal resistance is little, in light weight, cost is low, energy-saving effect is remarkable.

Description of drawings

Fig. 1 is used for the high-power LED heat radiating device structural representation for the present invention;

Fig. 2 is used for high-power LED heat radiating device evaporimeter cross-sectional view for the present invention.

The specific embodiment

High-power LED heat radiating device structural representation as shown in Figure 1, device comprise that four parts such as evaporimeter 1, circulation pipe 2 (comprising 2a, 2b, section such as 2c), condenser 3, reservoir 5 form; Be connected with the great power LED 9 that is cooled.Evaporimeter 1 is a tabular, and condenser 3 can be flexible, can satisfy any moulding needs.Great power LED 9 is by the wall welding of welding material 10 with evaporimeter 1.Inner and the reservoir 5 inside capillary structure silk screen 11 that all tiled at evaporimeter 1, and the capillary structure silk screens 11 of evaporimeter 1 inside and reservoir 5 inside are connected as a single entity.The capillarity of silk screen 11 is up inhaled liquid working substance 4, makes capillary structure 11 be full of worker quality liquid.The heat that great power LED 9 sends, when the wall by welding material 10 and evaporimeter 1 passes to evaporimeter 1, the working medium 4 of the silk screen capillary structure 11 of evaporimeter 1 inside and evaporimeter 1 inside is heated simultaneously, working medium 4 in the evaporimeter 1 just can be heated and be flashed to gas, the heat that great power LED 9 produces is taken away, and by in the evaporimeter cross-sectional view as shown in Figure 2 by the wall of evaporimeter 1, silk screen capillary structure 11 in the evaporimeter 1 and the 7 common steam conduits 12 that constitute of the fin in the evaporimeter 1, steam pipeline section 2a along circulation pipe 2 arrives among the condenser pipeline section 2b of the circulation pipe 2 in the condenser 3, and in the condenser pipeline section 2b of the circulation pipe 2 of condenser 3 by cooling naturally or force the mode of cooling to be condensed into liquid, discharge latent heat, then, liquid return tube section 2c by circulation pipe 2 passes reservoir 5 along liquid return tube section 2c and is back in the evaporimeter 1 in the circulation pipe 2c pipeline section under the acting in conjunction of capillary pump power that silk screen capillary structure 11 produces and gravity again, be back in the silk screen capillary structure 11 in the evaporimeter 1 by the aperture 8 on the tube wall of the circulation pipe 2c in the evaporimeter 1 again, so formed the flow circuit and the heat transfer process of a working medium 4.In the reservoir 5 worker quality liquid is housed, effect is contained in the steam pipeline section 2a of circulation pipe 2 and the liquid among the condenser pipeline section 2b when mainly being startup, and prevents that when operation worker quality liquid from having little time backflow and causing evaporimeter 1 dry.The effect of steam baffle plate 6 is that the space in steam in the evaporimeter 1 and the reservoir 5 is kept apart, and the steam in the device 1 that can avoid evaporating is effectively scurried in the reservoir 5.

Claims

1. the heat abstractor of a great power LED, it comprises great power LED, evaporimeter, circulation pipe, condenser, reservoir; Described evaporimeter is a tabular, the direct and great power LED welding of the wall of evaporimeter; Evaporimeter, condenser and reservoir are connected successively by circulation pipe; All the tile silk screen of capillary structure of the inner and described reservoir inside of described flat evaporimeter, and the capillary structure silk screen of evaporimeter inside and reservoir inside is connected as a single entity; It is characterized in that described circulation pipe connects evaporimeter, condenser and reservoir successively; Passing backflow pipeline section part that reservoir extend into plate evaporator inside has several at its tube wall and is convenient to worker quality liquid and is back to aperture on the capillary structure silk screen in the evaporimeter as early as possible.