CN205424865U - High -power LED phase change heat sink - Google Patents

High -power LED phase change heat sink Download PDF

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Publication number
CN205424865U
CN205424865U CN201620106079.0U CN201620106079U CN205424865U CN 205424865 U CN205424865 U CN 205424865U CN 201620106079 U CN201620106079 U CN 201620106079U CN 205424865 U CN205424865 U CN 205424865U
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Prior art keywords
heat
phase
pipe
heat pipe
fluid reservoir
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CN201620106079.0U
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Chinese (zh)
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陈平
白鹏飞
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GUANGZHOU HUAZUAN ELECTRONIC TECHNOLOGY Co Ltd
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GUANGZHOU HUAZUAN ELECTRONIC TECHNOLOGY Co Ltd
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Abstract

The utility model discloses a high -power LED phase change heat sink is equipped with heat conduction stock solution room (10), one piece at least heat pipe (20) and at least a slice radiating fin (30), the upper end of heat pipe (20) is sealed, the lower extreme is uncovered, the uncovered equal fixed mounting of lower extreme of each heat pipe (20) on the outer wall of heat conduction stock solution room (10) and with vacuum inner chamber (10a) the intercommunication of heat conduction stock solution room (10), each heat pipe (20) all contact with at least a slice radiating fin (30), it leads hot working medium to have held the liquid state in the vacuum inner chamber (10a) of heat conduction stock solution room (10), this liquid state is led hot working medium and can be evaporated at the heat that the absorption LED that phase change heat sink installs sent and liquefy again behind the cold release heat of chance. The utility model has the advantages of the radiating rate is fast, heat dissipation power height, light in weight, application scope guangZhou, but the high -power LED heat dissipation of wide application and other high powers, high thermal current density and the heat dissipation occasion of having relatively high expectations to weight.

Description

A kind of high-power LED phase-change radiator
Technical field
The utility model relates to a kind of high-power LED phase-change radiator, is applied to great power LED cooling occasion.
Background technology
The general principle of phase-change heat radiating device is near the heat absorption of the i.e. hot junction, one end of thermal source, makes the liquid refrigerant in heat dissipation cavity by thermal evaporation, and takes away heat, the cold end of steam flow heat abstractor, condenses into liquid, releases latent heat simultaneously, under the effect of capillary force and gravity, liquid is back to hot junction.So, just complete a closed circulation, thus substantial amounts of heat is passed to from hot junction cold end, and by fin Quick diffusing to external environment condition.Heat pipe and soaking plate are all based on the phase-change heat sink that such principle is fabricated by.
But the caloric value recently as LED chip is increasing, the hot zone heat flow density of LED is more and more higher, and traditional phase-change heat sink can not meet the radiating requirements of high-capacity LED, and, existing phase-change heat sink weight is the biggest, relatively costly.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of high-power LED phase-change radiator.
Solving above-mentioned technical problem, the technical scheme that the utility model is used is as follows:
A kind of high-power LED phase-change radiator, it is characterised in that: described phase-change heat sink is provided with heat conduction fluid reservoir, at least heat pipe and the most a piece of radiating fin;The upper end closed of described heat pipe, lower end are uncovered, connect on the uncovered outer wall being all fixedly mounted on described heat conduction fluid reservoir in the lower end of each described heat pipe and with the vacuum lumen of described heat conduction fluid reservoir, each described heat pipe all contacts with the most a piece of described radiating fin, being contained with liquid heat conductive working medium in the vacuum lumen of described heat conduction fluid reservoir, this liquid heat conductive working medium in the heat of vaporization that absorption the installed LED of phase-change heat sink sends and can liquefy after meeting cold release heat again.
Heat in order to prevent heat conduction fluid reservoir from being sent by LED dryouies and is damaged, and as a kind of improvement of the present utility model, on the inwall of described heat conduction fluid reservoir, sintering has copper powder porous structure layer.
In order to improve the radiating efficiency of phase-change heat sink, as a kind of improvement of the present utility model, the inwall of each described heat pipe is equipped with a plurality of along heat pipe axially extended water conservancy diversion groove.
In order to improve the liquid heat conductive working medium heat absorption efficiency to LED release heat, as a kind of improvement of the present utility model, described heat conduction fluid reservoir is welded to form by upper cover plate and lower cover, the inner chamber forming a flat between described upper cover plate and lower cover is described vacuum lumen, this vacuum lumen is provided with the many support columns being connected between described upper cover plate and lower cover, on the outer wall of described upper cover plate, corresponding each described heat pipe is provided with an annular mounting seat, and the lower end of each described heat pipe is uncovered to be all inserted in corresponding annular mounting seat and is welded and fixed.
In order to take away the heat of liquid heat conductive working medium conduction quickly, uniformly, as one of preferred mounting means of radiating fin in the utility model, every a piece of described radiating fin is equipped with the corresponding described each heat pipe installation through hole relative to position, every a piece of described radiating fin is all fixed on described each heat pipe by described installation through hole suit, and each described radiating fin is parallel to each other and arranges along the axial uniform intervals of described heat pipe.
In order to take away the heat of liquid heat conductive working medium conduction quickly, uniformly, as in the utility model the two of the preferred mounting means of radiating fin, every a piece of described radiating fin all is close to be weldingly fixed on the sidewall of at least described heat pipe by end face, and axially arranged each parallel to its heat pipe being welded and fixed of every a piece of described radiating fin.
For the ease of changing liquid heat conductive working medium, as a kind of embodiment of the present utility model, the sidewall of described heat conduction fluid reservoir is provided with fluid-filling nozzle, and described liquid heat conductive working medium is filled with in the vacuum lumen of described heat conduction fluid reservoir by this fluid-filling nozzle.
For the ease of being arranged on LED by phase-change heat sink, as a kind of embodiment of the present utility model, described heat conduction fluid reservoir is provided with multiple for by phase-change heat sink location and installation hole, location on LED.
As a kind of preferred embodiment of the present utility model, described liquid heat conductive working medium is pure water or refrigerant.
As a kind of preferred embodiment of the present utility model, described heat pipe is circular copper pipe, the length of this circular copper pipe between 15cm to 30cm, internal diameter is between 6mm to 12.5mm.
Compared with prior art, the utility model has the advantages that
First, the main sites of heat generation of heat conduction fluid reservoir Yu LED is close to install by phase-change heat sink of the present utility model, the heat produced when can absorb LED operation by liquid heat conductive working medium, the steam produced after making the boiling of liquid heat conductive working medium is diffused rapidly in the tube chamber of each heat pipe, the heat that steam is taken away can be discharged in air by each radiating fin, steam then liquefies after chance is cold again becomes liquid heat conductive working medium, this operative liquid heat-conducting work medium is along the heat produced when being axially back in heat conduction fluid reservoir to be re-used for absorbing LED operation of each heat pipe, it is achieved thereby that the heat radiation to LED, therefore, the utility model has heat extension rapidly, thermal resistance is low, radiating rate is fast, the advantage that heat radiation power is high.
Second, the utility model, by arranging copper powder porous structure layer as liquid-sucking core, is adsorbed with a certain amount of liquid heat conductive working medium, it is possible to the heat preventing heat conduction fluid reservoir from being sent by LED dryouies and is damaged in the course of work of phase-change heat sink all the time;
3rd, the utility model is a plurality of along heat pipe axially extended water conservancy diversion groove by arranging on the inwall of heat pipe, make the liquid heat conductive working medium after cold liquefaction again is met in the upper end of heat pipe faster along in the vacuum lumen of water conservancy diversion groove heat conduction fluid reservoir under gravity and capillary force act on jointly, it is possible to increase the radiating efficiency of phase-change heat sink.
4th, the utility model is welded to form a heat conduction fluid reservoir with flat vacuum lumen by upper cover plate and lower cover, the contact area of heat conduction fluid reservoir and LED can be increased, and by by uncovered for the lower end of heat pipe connection on upper cover plate, can advantageously flowing up in steam, and the backflow of condensed fluid, thus further increase radiating efficiency of the present utility model.
5th, the utility model, by any one in two kinds of preferred mounting means of radiating fin, is all able to ensure that the area of dissipation of radiating fin maximizes, thus improves radiating efficiency of the present utility model.
6th, the utility model selects circular copper pipe as heat pipe, can be designed to different distributions and warp architecture according to the actual requirements, greatly add area of dissipation and design flexibility, improve the scope of application of the present utility model.
In sum, the utility model has the advantage that radiating rate is fast, heat radiation power is high, lightweight, applied widely, can extensively apply great power LED cooling and other high power, high heat flux and the heat radiation occasion higher to weight demands.
Accompanying drawing explanation
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings:
Fig. 1 is one of perspective view of phase-change heat sink of the present utility model;
Fig. 2 is the two of the perspective view of phase-change heat sink of the present utility model;
Fig. 3 is the phase-change heat sink of the present utility model sectional view when not installing radiating fin.
Detailed description of the invention
As shown in Figure 1 to Figure 3, high-power LED phase-change radiator of the present utility model, it is provided with 10, at least heat pipe 20 of heat conduction fluid reservoir and the most a piece of radiating fin 30.The upper end closed of heat pipe 20, lower end are uncovered, connect on the uncovered outer wall being all fixedly mounted on heat conduction fluid reservoir 10 in lower end of each heat pipe 20 and with vacuum lumen 10a of heat conduction fluid reservoir 10;Each heat pipe 20 all contacts with the most a piece of radiating fin 30;Vacuum lumen 10a of heat conduction fluid reservoir 10 is contained with liquid heat conductive working medium, liquid heat conductive working medium in the heat of vaporization that absorption the installed LED of phase-change heat sink sends and can liquefy after meeting cold release heat again, the sidewall of heat conduction fluid reservoir 10 is provided with fluid-filling nozzle 40, liquid heat conductive working medium is filled with in vacuum lumen 10a of heat conduction fluid reservoir 10 by this fluid-filling nozzle 40, in order to change liquid heat conductive working medium;Further, heat conduction fluid reservoir 10 is provided with multiple for by phase-change heat sink location and installation hole, location 50 on LED, in order to be arranged on LED by phase-change heat sink.
Wherein, above-mentioned heat conduction fluid reservoir 10 is welded to form by upper cover plate 11 and lower cover 12, the inner chamber forming a flat between upper cover plate 11 and lower cover 12 is vacuum lumen 10a, this vacuum lumen 10a is provided with the many support columns being connected between upper cover plate 11 and lower cover 12 14, to prevent the structure of heat conduction fluid reservoir 10 from deforming, on the outer wall of upper cover plate 11, corresponding each heat pipe 20 is provided with an annular mounting seat 13, and the lower end of each heat pipe 20 is uncovered to be all inserted in corresponding annular mounting seat 13 and is welded and fixed.The liquid heat conductive working medium being filled with in heat conduction fluid reservoir 10 is preferably pure water or refrigerant.
The above-mentioned preferably circular copper pipe of heat pipe 20, the length of this circular copper pipe preferably between 15cm to 30cm, internal diameter is preferably between 6mm to 12.5mm.Pipe can bend to variously-shaped, in order to installs fin and adapts to various occasions.
In order to take away the heat of liquid heat conductive working medium conduction quickly, uniformly, above-mentioned radiating fin 30 preferably uses one of both modes following to install:
Mode one: every a piece of radiating fin 30 is equipped with the installation through hole of the corresponding each relative position of heat pipe 20, every a piece of radiating fin 30 is all fixed on each heat pipe 20 by installing through hole suit, and each radiating fin 30 is parallel to each other and arranges along the axial uniform intervals of heat pipe 20.
Mode two (not shown): every a piece of radiating fin 30 all is close to be weldingly fixed on the sidewall of at least heat pipe 20 by end face, and axially arranged each parallel to its heat pipe 20 being welded and fixed of every a piece of radiating fin 30.
Heat in order to prevent heat conduction fluid reservoir 10 from being sent by LED dryouies and is damaged, on the inwall of above-mentioned heat conduction fluid reservoir 10, sintering has the copper powder porous structure layer 60 with capillary structure, make this copper powder porous structure layer 60 can be as liquid-sucking core, in the course of work of phase-change heat sink, it is adsorbed with a certain amount of liquid heat conductive working medium all the time, is damaged so that the heat preventing heat conduction fluid reservoir 10 from being sent by LED dryouies.
In order to improve the radiating efficiency of phase-change heat sink, it is equipped with a plurality of along heat pipe 20 axially extended water conservancy diversion groove 20a on the inwall of above-mentioned each heat pipe 20, make the liquid heat conductive working medium after cold liquefaction again is met in the upper end of heat pipe 20 faster along in vacuum lumen 10a of water conservancy diversion groove 20a heat conduction fluid reservoir 10 under gravity and capillary force act on jointly, to improve the radiating efficiency of phase-change heat sink.
Occupation mode and the operation principle of high-power LED phase-change radiator of the present utility model are as follows:
Phase-change heat sink is fixedly mounted on LED, and the main heating position i.e. thermal source of LED is close on the lower cover 12 of heat conduction fluid reservoir 10;Thus, the heat that liquid heat conductive working medium in heat conduction fluid reservoir 10 produces when can absorb LED operation by heat conduction fluid reservoir 10, after liquid heat conductive working medium is seethed with excitement, its steam produced also is diffused rapidly in the tube chamber of each heat pipe 20, the heat that steam is taken away can be discharged in air by each radiating fin 30, steam then liquefies after chance is cold again becomes liquid heat conductive working medium, this operative liquid heat-conducting work medium is along the heat produced when being axially back in heat conduction fluid reservoir 10 to be re-used for absorbing LED operation of each heat pipe 20, this is a Guan Bi heat radiation circulation of the utility model phase-change heat sink.
The utility model is not limited to above-mentioned detailed description of the invention; according to foregoing; ordinary technical knowledge and customary means according to this area; without departing under the utility model above-mentioned basic fundamental thought premise; the utility model can also be made the equivalent modifications of other various ways, replace or change, and all falls among protection domain of the present utility model.

Claims (10)

1. a high-power LED phase-change radiator, it is characterised in that: described phase-change heat sink is provided with heat conduction fluid reservoir (10), at least heat pipe (20) and the most a piece of radiating fin (30);The upper end closed of described heat pipe (20), lower end is uncovered, connect on the uncovered outer wall being all fixedly mounted on described heat conduction fluid reservoir (10) in the lower end of each described heat pipe (20) and with the vacuum lumen (10a) of described heat conduction fluid reservoir (10), each described heat pipe (20) all contacts with the most a piece of described radiating fin (30), the vacuum lumen (10a) of described heat conduction fluid reservoir (10) is contained with liquid heat conductive working medium, this liquid heat conductive working medium in the heat of vaporization that absorption the installed LED of phase-change heat sink sends and can liquefy after meeting cold release heat again.
Phase-change heat sink the most according to claim 1, it is characterised in that: on the inwall of described heat conduction fluid reservoir (10), sintering has copper powder porous structure layer (60).
Phase-change heat sink the most according to claim 1, it is characterised in that: it is equipped with a plurality of along heat pipe (20) axially extended water conservancy diversion groove (20a) on the inwall of each described heat pipe (20).
4. according to the phase-change heat sink described in claims 1 to 3 any one, it is characterized in that: described heat conduction fluid reservoir (10) is welded to form by upper cover plate (11) and lower cover (12), the inner chamber forming a flat between described upper cover plate (11) and lower cover (12) is described vacuum lumen (10a), this vacuum lumen (10a) is provided with the many support columns (14) being connected between described upper cover plate (11) and lower cover (12), on the outer wall of described upper cover plate (11), corresponding each described heat pipe (20) is provided with an annular mounting seat (13), the lower end of each described heat pipe (20) is uncovered to be all inserted in corresponding annular mounting seat (13) and is welded and fixed.
5. according to the phase-change heat sink described in claims 1 to 3 any one, it is characterized in that: every a piece of described radiating fin (30) is equipped with the installation through hole of corresponding described each heat pipe (20) position relatively, every a piece of described radiating fin (30) is all fixed on described each heat pipe (20) by described installation through hole suit, and each described radiating fin (30) is parallel to each other and arranges along the axial uniform intervals of described heat pipe (20).
6. according to the phase-change heat sink described in claims 1 to 3 any one, it is characterized in that: every a piece of described radiating fin (30) all is close to be weldingly fixed on the sidewall of at least described heat pipe (20) by end face, and the heat pipe (20) that is welded and fixed each parallel to it of every a piece of described radiating fin (30) is axially arranged.
7. according to the phase-change heat sink described in claims 1 to 3 any one, it is characterized in that: the sidewall of described heat conduction fluid reservoir (10) is provided with fluid-filling nozzle (40), described liquid heat conductive working medium is filled with in the vacuum lumen (10a) of described heat conduction fluid reservoir (10) by this fluid-filling nozzle (40).
8. according to the phase-change heat sink described in claims 1 to 3 any one, it is characterised in that: described heat conduction fluid reservoir (10) is provided with multiple for by phase-change heat sink location and installation hole, location (50) on LED.
9. according to the phase-change heat sink described in claims 1 to 3 any one, it is characterised in that: described liquid heat conductive working medium is pure water or refrigerant.
10. according to the phase-change heat sink described in claims 1 to 3 any one, it is characterised in that: described heat pipe (20) is circular copper pipe, the length of this circular copper pipe between 15cm to 30cm, internal diameter is between 6mm to 12.5mm.
CN201620106079.0U 2016-02-02 2016-02-02 High -power LED phase change heat sink Active CN205424865U (en)

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Application Number Priority Date Filing Date Title
CN201620106079.0U CN205424865U (en) 2016-02-02 2016-02-02 High -power LED phase change heat sink

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Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106524092A (en) * 2016-12-09 2017-03-22 淳铭散热科技股份有限公司 Cooling device for electronic devices and apparatuses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106524092A (en) * 2016-12-09 2017-03-22 淳铭散热科技股份有限公司 Cooling device for electronic devices and apparatuses

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