CN203215636U

CN203215636U - Light-emitting diode (LED) module conducting radiating through loop type parallel flow pulsating heat pipe

Info

Publication number: CN203215636U
Application number: CN201320261977XU
Authority: CN
Inventors: 蔡中盼; 员冬玲; 邵敏; 李选友
Original assignee: Tianli Energy-Saving Engineering Co Ltdof Shandong Academy Of Sciences
Current assignee: Tianli Energy-Saving Engineering Co Ltdof Shandong Academy Of Sciences
Priority date: 2013-05-14
Filing date: 2013-05-14
Publication date: 2013-09-25
Anticipated expiration: 2023-05-14

Abstract

The utility model discloses a light-emitting diode (LED) module conducting radiating through a loop type parallel flow pulsating heat pipe. The LED module comprises a substrate. An LED semi-conductor device is arranged on the substrate, and the loop type parallel flow pulsating heat pipe is further arranged on the substrate and comprises a plurality of U-shaped porous flat pipes and a connected pipe. The cross section of the connected pipe is rectangular. The open ends of the plurality of U-shaped porous flat pipes are connected with the upper portion of the connected pipe, the bottom of the connected pipe is used as the heat absorbing end and fixed on the substrate, and fins are arranged among the U-shaped porous flat pipes. A radiating base and the substrate are fixed through heat conduction silicone grease. The LED module has the advantages of being fast in radiating, stable in operation, simple in manufacture and the like.

Description

A kind of LED module of loop type concurrent flow pulsating heat pipe heat radiation

Technical field

The utility model relates to a kind of heat abstractor, relates in particular to a kind of loop type concurrent flow pulsating heat pipe heat abstractor of the LED of being applied to semiconductor lighting.

Background technology

The heat dissipation problem of LED semiconductor lighting is a difficult problem always, at present, generally adopt aluminium (die casting or extrusion modling) as the LED radiator, can also satisfy the heat radiation requirement for low power LED lamp, but for high-powered LED lamp, heat dissipation problem can also effectively be solved.In the technology, in order to reach enough area of dissipations, have to do the size of radiator greatlyyer now, also heavier, moreover, because volume is bigger, influence the speed of conducting heat conversely again.If heat dissipation problem can not get solving, junction temperature is too high when causing the work of LED semiconductor lighting device easily, can cause LED semiconductor light decay to accelerate, and shortens semi-conductive service life of LED even defective chip.

Pulsating heat pipe is called oscillating heat pipe again, proposed by Japanese scholar H.Akachi the nineties in last century, the pulsating heat pipe of prior art is the simple but two phase flow heat transfer device of mechanism complexity of a kind of mechanism, it is that a long capillary is vacuumized, then capillary inside is charged into liquid, if capillary diameter is enough little, will form steam binding and liquid plug off and in the pipe, liquid carburation by evaporation when an end of pulsating heat pipe is heated, steam flow to the other end and emit heat and condense into liquid under small pressure reduction.Pulsating heat pipe is simple in structure, does not need the imbibition core, is not subjected to gravity effect, and caliber is little, and the heat pipe shape can be crooked arbitrarily, and adaptability is good, so manufacturing, operation and maintenance cost are low.Though the pulsating heat pipe of prior art has above-mentioned all advantages, the defective that exists is: because the caliber of traditional pulsating heat pipe is too little, with LED semiconductor lighting substrate bonding fixedly the time difficulty big, simultaneously, the outer interpolation fin that is difficult for of pipe, heat exchange area is limited, has also influenced heat exchange efficiency.

The utility model content

For solving the deficiency of existing LED semiconductor lighting radiating mode, the utility model provides a kind of LED module based on the heat radiation of loop type concurrent flow pulsating heat pipe, this module is combined LED semiconductor lighting device and concurrent flow pulsating heat pipe heat abstractor, and the heat that LED semiconductor lighting device is produced when work is derived fast by the concurrent flow pulsating heat pipe and is dispersed in the air.

The utility model adopts following technical proposals to realize:

A kind of LED module of loop type concurrent flow pulsating heat pipe heat radiation, comprise substrate, be provided with the LED semiconductor devices at described substrate, also be provided with loop type concurrent flow pulsating heat pipe at substrate, described loop type concurrent flow pulsating heat pipe comprises a plurality of U-shaped porous flat pipes and a collection connecting leg, the openend of described a plurality of U-shaped porous flat pipes all is connected in collection connecting leg top, and the bottom of collection connecting leg is fixed on the substrate as heat absorbing end, is provided with fin between each U-shaped porous flat pipe.

Be provided with a plurality of capillary conduits in the described U-shaped porous flat pipe, separate by the capillary cell wall between the adjacent capillary conduit, it is linear evenly distributed that the capillary conduit becomes, and with collection connecting leg UNICOM, be provided with the working media that under vacuum, encapsulates in capillary conduit and the collection connecting leg, working media forms steam binding and liquid plug in pipe, steam binding and liquid plug distribute alternately in capillary conduit and collection connecting leg.

In the described porous flat pipe cross sectional shape in capillary channel road be circle, rectangle, triangle, one or more the combination in trapezoidal, its equivalent diameter scope is 0.5～3.5mm, working media in capillary conduit and the collection connecting leg can be any among distilled water, methyl alcohol, absolute ethyl alcohol, acetone, R123, the R134a, and the liquid filled ratio of working media is between 30%～70%.

Described concurrent flow pulsating heat pipe is loop type.

Described concurrent flow pulsating heat pipe adopts copper material or high heat conduction aluminium to make.

The course of work of the present utility model is as follows:

When the heat absorbing end of concurrent flow pulsating heat pipe absorbs the heat that produces when the LED semiconductor is worked, the working media of collection in the connecting leg carburation by evaporation that is heated, steam flows to radiating end and emits heat and condense into liquid under small pressure reduction, be back to heat absorbing end then and continue to absorb heat, reciprocation cycle reaches the cooling purpose, and it is fast that this device has radiating effect, stable, make advantages such as simple.

The beneficial effects of the utility model:

The heat that produces when (1) making the work of LED semiconductor lighting device can be passed to radiating end and fin fast and be dispersed in the air by the heat absorbing end of concurrent flow pulsating heat pipe, reduce the working junction temperature of LED semiconductor lighting device, thereby reduce the light decay of LED semiconductor lighting, improve the service life of LED semiconductor lighting device.

(2) used loop type concurrent flow pulsating heat pipe in the utility model, being equivalent to has several common pulsating heat pipes in the concurrent flow pulsating heat pipe, being combined with substrate that this structure can improve effectively that common pulsating heat pipe exists in using be difficult, with problems such as fin difficulties, have the simple in structure of common pulsating heat pipe simultaneously, do not need the imbibition core, be not subjected to gravity effect, heat transfer rate is fast, uniform temperature is strong, heat radiation fully, and advantages such as stable, manufacture craft is simple, and manufacturing, operation and maintenance cost are low.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the A-A cutaway view;

Fig. 3 is side view of the present utility model;

Fig. 4 is the B-B cutaway view;

Wherein: 1. concurrent flow pulsating heat pipe; 2.U type porous flat pipe; 3. collection connecting leg; 4. fin; 5. heat-conducting silicone grease; 6.LED semiconductor devices; 7. substrate; 8. steam binding; 9. liquid plug; 10. capillary conduit; 11. capillary cell wall.

The specific embodiment

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

As shown in Figures 1 to 4, the LED module based on the heat radiation of loop type concurrent flow pulsating heat pipe comprises concurrent flow pulsating heat pipe 1, fin 4, heat-conducting silicone grease 5 and the substrate 7 that is welded with LED semiconductor devices 6.Concurrent flow pulsating heat pipe 1 is made up of a plurality of U-shaped porous flat pipes 2 and a collection connecting leg 3, the shape of cross section of collection connecting leg 3 is rectangle, a plurality of capillary conduits 10 are arranged in the U-shaped porous flat pipe 2, separate by capillary cell wall 11 between the adjacent capillary conduit 10,10 one-tenth of capillary conduits are linear evenly distributed, be provided with the working media that encapsulates under the vacuum in capillary conduit 10 and the collection connecting leg 3, working media forms steam binding 8 and liquid plug 9 in pipeline, and steam binding 8 distributes alternately in capillary conduit 10 and collection connecting leg 3 with liquid plug 9.Collection connecting leg 3 is as heat absorbing end, and fixing with substrate 7 bondings by heat-conducting silicone grease 5, U-shaped porous flat 2 is provided with fin 4 as radiating end at radiating end, to increase area of dissipation.The heat absorbing end of concurrent flow pulsating heat pipe 1 absorbs the heat that produces in 6 work of LED semiconductor devices, the working media carburation by evaporation that is heated in the pipe, steam flows to radiating segment under small pressure reduction, by radiating end and fin 4 heat is dispersed in the air, reaches the cooling purpose.

The concurrent flow pulsating heat pipe is loop type, and the working media in described capillary conduit 10 and the collection connecting leg 3 is any among distilled water, methyl alcohol, absolute ethyl alcohol, acetone, R123, the R134a, and the liquid filled ratio of working media is between 30%～70%.The shape of cross section of capillary conduit 10 is circle, rectangle, triangle, a kind of or its any combination pattern in trapezoidal, and the equivalent diameter of capillary conduit 10 is between 0.5～3.5mm.Parallel flow heat pipe adopts copper material or high heat conduction aluminium to make.

Though above-mentionedly by reference to the accompanying drawings the specific embodiment of utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.

Claims

1. the LED module of loop type concurrent flow pulsating heat pipe heat radiation, comprise substrate, be provided with the LED semiconductor devices at described substrate, it is characterized in that, also be provided with loop type concurrent flow pulsating heat pipe at substrate, described loop type concurrent flow pulsating heat pipe comprises a plurality of U-shaped porous flat pipes and a collection connecting leg, described collection connecting leg shape of cross section is rectangle, the openend of described a plurality of U-shaped porous flat pipes all is connected in collection connecting leg top, the bottom of collection connecting leg is fixed on the substrate as heat absorbing end, is provided with fin between each U-shaped porous flat pipe.

2. the LED module of loop type concurrent flow pulsating heat pipe heat radiation as claimed in claim 1 is characterized in that described heat dissipation base and substrate are fixed by heat-conducting silicone grease.

3. the LED module of loop type concurrent flow pulsating heat pipe as claimed in claim 1 heat radiation, it is characterized in that, be provided with a plurality of capillary conduits in the described porous flat pipe, separate by the capillary cell wall between the adjacent capillary conduit, it is linear evenly distributed that the capillary conduit becomes, and with collection connecting leg UNICOM, be provided with the working media that encapsulates under the vacuum in capillary conduit and the collection connecting leg, working media forms steam binding and liquid plug in pipe, steam binding and liquid plug distribute alternately in capillary conduit and collection connecting leg.

4. the LED module of loop type concurrent flow pulsating heat pipe as claimed in claim 3 heat radiation is characterized in that, the cross sectional shape of described capillary conduit is circle, rectangle, triangle, one or more the combination in trapezoidal.

5. the LED module of loop type concurrent flow pulsating heat pipe heat radiation as claimed in claim 3 is characterized in that the equivalent diameter scope of described capillary conduit is 0.5～3.5mm.

6. the LED module of loop type concurrent flow pulsating heat pipe heat radiation as claimed in claim 3 is characterized in that, the working media in described capillary conduit and the collection connecting leg is any among distilled water, methyl alcohol, absolute ethyl alcohol, acetone, R123, the R134a.

7. the LED module of loop type concurrent flow pulsating heat pipe heat radiation as claimed in claim 3 is characterized in that, the liquid filled ratio of working media is 30%～70% in described capillary conduit and the collection connecting leg.

8. the LED module of loop type concurrent flow pulsating heat pipe heat radiation as claimed in claim 1 is characterized in that described concurrent flow pulsating heat pipe is loop type.

9. the LED module of loop type concurrent flow pulsating heat pipe heat radiation as claimed in claim 1 is characterized in that, described concurrent flow pulsating heat pipe adopts copper material or high heat conduction aluminium to make.