CN104422320A - Heat pipe - Google Patents
Heat pipe Download PDFInfo
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- CN104422320A CN104422320A CN201310370053.8A CN201310370053A CN104422320A CN 104422320 A CN104422320 A CN 104422320A CN 201310370053 A CN201310370053 A CN 201310370053A CN 104422320 A CN104422320 A CN 104422320A
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Abstract
The invention provides a heat pipe. The heat pipe comprises a pipe casing, a liquid absorbing core and an elastic layer; the pipe casing forms into a sealing chamber and comprises an evaporation end and a condensing end; the liquid absorbing core is tightly adhered to the internal surface of the pipe casing; at least a gap is formed between the external side of the liquid absorbing core portion which is arranged inside the evaporation end and the pipe casing; the elastic layer tightly coats the external side of the liquid absorbing core to block condensing liquid to penetrate the gap; the liquid absorbing core is driven to recover when the condensing liquid is condensed.
Description
Technical field
The invention relates to a kind of radiator, especially have about a kind of heat pipe.
Background technology
The electronic product arithmetic speed in modern age constantly promotes, and its heat produced is also more and more higher, therefore the heat abstractor be in the past made up of aluminium extruded type radiator and fan can not deal with the user demand of current arithmetic unit.Especially now the trend of electronic product is that product is done less and less, but and hence, limit the space of heat radiation.Under these two important factor impacts, the technology of heat radiation is faced with severe tests, and therefore develops the heat pipe with higher heat conduction efficiency, effectively to solve the heat dissipation problem of present stage, is the current task of top priority.
Known heat pipe comprises a shell and a liquid-sucking core, and wherein liquid-sucking core is arranged in the internal side wall of copper pipe, and shell comprises an evaporation ends and a condensation end.In addition, also include condensate liquid in shell inside, this condensate liquid is such as water.When shell is in order to dispel the heat, the evaporation ends of shell connects a thermal source, therefore the condensate liquid be positioned at wherein absorbs heat herein and is evaporated to gas.Now, due to the relation of pressure differential, condensate liquid can flow to condensation end.Condensate liquid enters in the hole of liquid-sucking core after condensation end cooling condensation, is back to evaporation ends more afterwards by the capillary force of liquid-sucking core.
But known adopting heat pipes for heat transfer ability can be subject to the restriction of the radial heat-transfer capability of evaporator section, if evaporator section radial heat flows density is excessive, then in liquid-sucking core, the loop of condensate liquid may be hindered, and heat-transfer capability is restricted.When evaporator section heat flow density is excessive, liquid boiling in liquid-sucking core, if the bubble that boiling produces successfully can discharge tube core, then heat transfer can strengthen; Otherwise bubble will block pore, in liquid-sucking core, liquid working substance loop will be damaged, thus liquid-sucking core local is dry, and heat-transfer capability is declined.
Summary of the invention
Therefore object of the present invention is providing a kind of heat pipe exactly, and it comprises a shell, a liquid-sucking core and posterior limiting.Shell forms a closed cavity and comprises an evaporation ends and a condensation end.Liquid-sucking core fits tightly the inner surface in shell, and the portion outboard and the shell that are wherein positioned at the liquid-sucking core of evaporation ends form at least one gap.Elastic layer, closely outside the coated liquid-sucking core being positioned at gap, penetrates into gap in order to intercept condensate liquid, and when after condensate liquid condensation, drives liquid-sucking core to restore to the original state.When the condensate liquid in shell seethes with excitement in evaporation ends, closed cavity and at least one gap form a pressure reduction, under differential pressure action, liquid-sucking core stretches to gap, the pore of liquid-sucking core becomes large, the bubble that condensate liquid boiling produces is discharged from pore and is enhanced evaporation ends and condensation end conductivity of heat, bubble flow is released heat to condensation end and is condensed into condensate liquid, and liquid-sucking core restores to the original state under elastic layer effect.
According to another embodiment of the present invention, the sectional area of evaporation ends is greater than the sectional area of condensation end.
According to another embodiment of the present invention, the sectional area of evaporation ends is greater than the sectional area of other parts of shell.
According to another embodiment of the present invention, elastic layer is aqueous vapor barrier layer.
According to another embodiment of the present invention, the portion outboard do not contacted with thermal source and the shell that are positioned at the liquid-sucking core of evaporation ends form at least one gap.
According to another embodiment of the present invention, the material of shell comprises copper or aluminium.
According to another embodiment of the present invention, closed cavity and at least one gap are vacuum chamber.
According to another embodiment of the present invention, shell cross sectional shape is circular or polygon, and described polygon can be rectangle.
According to another embodiment of the present invention, condensate liquid comprises ammonia, methyl alcohol, ethanol or water.
According to another embodiment of the present invention, liquid-sucking core is a metal powder sintered structure.
When the liquid-sucking core inner condensat liquid of known heat pipe seethes with excitement, bubble produces too fast and from the smooth and easy discharge of the pore of liquid-sucking core, thus cannot make the problem that adopting heat pipes for heat transfer ability declines.The present invention is in order to improve this phenomenon, and the heat pipe of design effectively can improve the problem of pore blocking.When the boiling of its condensate liquid of heat pipe of the present invention forms gaseous state, liquid-sucking core stretches to gap, so the pore of inside just becomes large.Therefore, the bubble in liquid-sucking core is excluded smoothly, thus improves the problem that gas bubble blockage pore and adopting heat pipes for heat transfer ability decline.
Accompanying drawing explanation
Fig. 1 illustrates heat pipe schematic diagram of the present invention;
Fig. 2 is the profile of the hatching 2-2 ' of the heat pipe illustrated along Fig. 1;
Fig. 3 is the profile of the hatching 3-3 ' of the heat pipe illustrated along Fig. 2;
Fig. 4 illustrates another embodiment profile of heat pipe of the present invention.
Detailed description of the invention
Below will clearly demonstrate spirit of the present invention with accompanying drawing and detailed description, have in any art and usually know that the knowledgeable is after understanding preferred embodiment of the present invention, when by the technology of teachings of the present invention, can being changed and modifying, it does not depart from spirit of the present invention and scope.
For solve known heat pipe liquid-sucking core in liquid boiling time, liquid bubble produces too fast and from the smooth and easy discharge of the pore of liquid-sucking core, thus cannot make the problem that adopting heat pipes for heat transfer ability declines.Heat pipe of the present invention effectively can improve the problem of above-mentioned pore blocking liquid bubble.Please refer to Fig. 1, it illustrates heat pipe schematic diagram of the present invention.Heat pipe 100 of the present invention has a shell 102.Shell 102 comprises evaporation ends 104 and a condensation end 108.Evaporation ends 104 connects a thermal source 500, in order to absorb the heat of thermal source 500.Condensation end 108 connects a radiator 600, gets rid of in order to the heat energy transmitted by evaporation ends 104.The material of shell 102 is generally copper or aluminium, and the reason using copper material is that copper has better heat-transfer effect, uses aluminium then can reduce costs.
It should be noted, the material selection of the shell 102 more than enumerated is only illustration, is not used to limit the present invention, and persond having ordinary knowledge in the technical field of the present invention should look actual needs, selects suitable material.
Please refer to Fig. 2, it illustrates the profile of the hatching 2-2 ' of the heat pipe along Fig. 1.Heat pipe 100 of the present invention comprises shell 102, liquid-sucking core 110 and a posterior limiting 140.Shell 102 forms a closed cavity 120 and comprises evaporation ends 104 and a condensation end 108.Liquid-sucking core 110 fits tightly the inner surface in shell 102, and the portion outboard and the shell 102 that are wherein positioned at the liquid-sucking core 110 of evaporation ends 104 form at least one gap 130.Elastic layer 140, closely outside the coated liquid-sucking core 110 being positioned at gap 130, penetrates into gap 130 in order to intercept condensate liquid, and when after condensate liquid condensation, drives liquid-sucking core 110 to restore to the original state.When the condensate liquid in shell 102 seethes with excitement in evaporation ends 104, closed cavity 120 and at least one gap 130 form a pressure reduction, under differential pressure action, liquid-sucking core 110 stretches to gap 130, the pore of liquid-sucking core 110 becomes large, the bubble that condensate liquid boiling produces is discharged from pore and is enhanced evaporation ends 104 (see Fig. 1) and condensation end 108 (see Fig. 1) conductivity of heat, bubble flow is released heat to condensation end 108 and is condensed into condensate liquid, and liquid-sucking core 110 restores to the original state under elastic layer 140 acts on.In one embodiment of this invention, the sectional area of evaporation ends 104 is greater than the sectional area of condensation end 108.In another embodiment of the invention, the sectional area of evaporation ends 104 is greater than the sectional area of other parts of shell 102.A condensate liquid is inserted in the closed cavity 120 of shell 102.Liquid-sucking core 110 is positioned at the inner side of closed cavity 120, so as to absorbing and transmitting condensate liquid.Heat energy to absorb or release heat energy by the change of its liquid phase, is passed to condensation end 108 from evaporation ends 104, and is back to evaporation ends 104 after condensation and again absorbs heat energy by condensate liquid.Have about cooling mechanism, have more detailed explanation afterwards.Condensate liquid can be ammonia, methyl alcohol, ethanol or water, because it easily obtains, and has the advantages such as cost is low, mobility is good, heat-sinking capability is good concurrently, admittedly enumerate above material, is not used to limit the present invention.
Please also refer to Fig. 1 and Fig. 2.When the evaporation ends 104 of heat pipe 100 of the present invention, when contacting a thermal source 500, heat energy can be conducted by thermal source 500 and enter evaporation ends 104, conducted by evaporation ends 104 again and enter the liquid condensation liquid being positioned at evaporation ends 104, after liquid condensation liquid absorbs heat, carry out phase change, become gaseous state from liquid state, form gaseous state condensate liquid.
Please refer to Fig. 2.Evaporation ends 104 is after absorption heat, and the boiling of liquid condensation liquid forms gaseous state condensate liquid, and produces liquid bubble at liquid-sucking core 110.Because boiling phenomenon causes closed cavity 120 pressure to increase, liquid-sucking core 110 follows direction 210 and stretches to gap 130, and pore just becomes large, so bubble is got rid of more smoothly.The bubble produced when boiling is discharged smoothly, when there is not pressure reduction, and the shape before elastic layer 140 and liquid-sucking core 110 just recover.Elastic layer 140 is aqueous vapor barrier layer, and therefore liquid condensation liquid cannot traverse to gap 130.In known heat pipe structure, the volume of the pore of liquid-sucking core cannot become large, and therefore bubble generation is too fast cannot discharge often smoothly, affects the capacity of heat transmission.Between evaporation ends 104 and condensation end 108, there is small pressure differential, gaseous state condensate liquid can be flowed along direction 150, carry heat is subject to condensation to condensation end 108, then get back to evaporation ends 104 along direction 160 and absorb heat again, form thermal cycle.
Closed cavity 120 in shell 102 and gap 130 are a vacuum chamber, therefore not only can reduce the gasification point of condensate liquid, make it easily carry out phase change, accelerate whole cooling mechanism.In addition, other gas can also be avoided to disturb the phenomenon of gaseous state condensate liquid convection current and distribution, make gaseous state condensate liquid energy fast distribution to condensation end 108.Above-mentioned vacuum chamber generally refers to rough vacuum, pressure in the scope of 760 ~ 1 Bristols (Torr), have in art usually know the knowledgeable also visual actual needs be pumped into required level of vacuum.
Please refer to Fig. 3, it illustrates the profile of the hatching 3-3 ' of the heat pipe along Fig. 2.By figure seeing shell 102 cross sectional shape is circular.The shell 102 of general circle makes with blowing method, and it is with low cost, manufactures fast, therefore extensively use by industry.In the present embodiment, liquid-sucking core 110 is metal powder sintered structure, because of its make yield high and stable, therefore accept by industry.As can be seen from this figure, between the part R do not contacted with thermal source and liquid-sucking core 110 of the shell 102 of evaporation ends 104, form at least one gap 130.Therefore the shell 102 contacted with thermal source 500, the liquid-sucking core 110 of its inside directly contacts with shell 102, makes the liquid condensation liquid of liquid-sucking core 110 inside effectively be absorbed the heat of self-heat power 500.When the boiling of liquid condensation liquid forms gaseous state condensate liquid, and produce liquid bubble at liquid-sucking core 110.Because boiling phenomenon causes closed cavity 120 pressure to increase, liquid-sucking core 110 follows direction 210 and stretches to gap 130, and pore just becomes large, so bubble is got rid of more smoothly.The bubble produced when boiling is discharged smoothly, when there is not pressure reduction, and the shape before elastic layer 140 and liquid-sucking core 110 just recover.Elastic layer 140 is aqueous vapor barrier layer, and therefore liquid condensation liquid cannot traverse to gap 130.
It should be noted, more than enumerating shell 102 cross sectional shape is that circular design is only illustration, and be not used to limit the present invention, persond having ordinary knowledge in the technical field of the present invention should look actual needs, selects suitable design arrangement.
Please refer to Fig. 4, Fig. 4 illustrates another embodiment profile of heat pipe of the present invention.Shell cross sectional shape of the present invention can be circle or polygon, and polygon is rectangle in the present embodiment.Can see that shell 102 ' cross sectional shape is rectangle, general rectangular shell 102 ' cross section by figure, be to do close contact with square thermal source 500, to reach best heat-transfer effect.Its shell 102 ' also visual demand makes polygon.Be positioned between the part R ' do not contacted with the thermal source inner side of the shell 102 of evaporation ends 104 and liquid-sucking core 110 and form at least one gap 130.After the liquid condensation liquid of liquid-sucking core 110 inside absorbs the heat of self-heat power 500, the boiling of liquid condensation liquid forms gaseous state condensate liquid, and produces liquid bubble at liquid-sucking core 110.Because boiling phenomenon causes closed cavity 120 pressure to increase, liquid-sucking core 110 follows direction 220 and stretches to gap 130, and pore just becomes large, so bubble is got rid of more smoothly.The bubble produced when boiling is discharged smoothly, when there is not pressure reduction, and the shape before elastic layer 140 and liquid-sucking core 110 just recover.Elastic layer 140 is aqueous vapor barrier layer, and therefore liquid condensation liquid cannot traverse to gap 130.
When the liquid-sucking core inner condensat liquid of known heat pipe seethes with excitement, bubble produces too fast and from the smooth and easy discharge of the pore of liquid-sucking core, thus cannot make the problem that adopting heat pipes for heat transfer ability declines.The present invention is in order to improve this phenomenon, and the heat pipe of design effectively can improve the problem of pore blocking.When the boiling of its condensate liquid of heat pipe of the present invention forms gaseous state, liquid-sucking core stretches to gap, so the pore of inside just becomes large.Therefore, the bubble in liquid-sucking core is excluded smoothly, thus improves the problem that gas bubble blockage pore and adopting heat pipes for heat transfer ability decline.
Claims (10)
1. a heat pipe, is characterized in that, comprises:
One shell, forms a closed cavity and comprises an evaporation ends and a condensation end; And
One liquid-sucking core, fits tightly the inner surface in this shell;
Wherein, the portion outboard and this shell that are positioned at this liquid-sucking core of this evaporation ends form at least one gap, and posterior limiting, closely outside the coated liquid-sucking core being positioned at this at least one gap, penetrates into this gap in order to intercept condensate liquid, and when after condensate liquid condensation, drive this liquid-sucking core to restore to the original state;
When the condensate liquid in this shell seethes with excitement in this evaporation ends, this closed cavity and this at least one gap form a pressure reduction, under differential pressure action, this liquid-sucking core stretches to this at least one gap, the pore of this liquid-sucking core becomes large, the bubble that the boiling of this condensate liquid produces is discharged from this pore, so as to enhanced water evaporation end and condensation end conductivity of heat, this bubble flow is released heat to this condensation end and is condensed into this condensate liquid, and this liquid-sucking core restores to the original state under this elastic layer effect.
2. heat pipe according to claim 1, is characterized in that, the sectional area of this evaporation ends is greater than the sectional area of this condensation end.
3. heat pipe according to claim 1, is characterized in that, the sectional area of this evaporation ends is greater than the sectional area of these other parts of shell.
4. heat pipe according to claim 1, is characterized in that, this elastic layer is aqueous vapor barrier layer.
5. heat pipe according to claim 1, is characterized in that, between the sections inner side do not contacted with thermal source and this liquid-sucking core of this shell of this evaporation ends, form this gap at least one.
6. heat pipe according to claim 1, is characterized in that, the material of this shell comprises copper or aluminium.
7. heat pipe according to claim 1, is characterized in that, this closed cavity and this at least one gap are vacuum chamber.
8. heat pipe according to claim 1, is characterized in that, this shell cross sectional shape is circular or polygon.
9. heat pipe according to claim 1, is characterized in that, this condensate liquid comprises ammonia, methyl alcohol, ethanol or water.
10. heat pipe according to claim 1, is characterized in that, this liquid-sucking core is a metal powder sintered structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310370053.8A CN104422320B (en) | 2013-08-21 | 2013-08-21 | Heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310370053.8A CN104422320B (en) | 2013-08-21 | 2013-08-21 | Heat pipe |
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| Publication Number | Publication Date |
|---|---|
| CN104422320A true CN104422320A (en) | 2015-03-18 |
| CN104422320B CN104422320B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310370053.8A Active CN104422320B (en) | 2013-08-21 | 2013-08-21 | Heat pipe |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107955849A (en) * | 2017-11-29 | 2018-04-24 | 中冶南方工程技术有限公司 | A kind of blast furnace cooling stave |
| CN110779366A (en) * | 2018-07-30 | 2020-02-11 | 株式会社理光 | Capillary wick, loop heat pipe, electronic device, porous body, and method for manufacturing capillary wick |
| CN111895827A (en) * | 2020-07-16 | 2020-11-06 | 广州大学 | Thermal diode and processing method thereof |
| EP3748273A1 (en) * | 2019-06-07 | 2020-12-09 | Ricoh Company, Ltd. | Evaporator, loop heat pipe, and electronic device |
| CN114123661A (en) * | 2021-12-03 | 2022-03-01 | 东方电气集团东方电机有限公司 | Heat dissipation method for motor sliding bearing |
| CN114440678A (en) * | 2022-02-17 | 2022-05-06 | 郭鹏杰 | Multidimensional heat pipe and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617985A (en) * | 1984-09-11 | 1986-10-21 | United Kingdom Atomic Energy Authority | Heat pipe stabilized specimen container |
| CN1837737A (en) * | 2005-03-23 | 2006-09-27 | 富准精密工业(深圳)有限公司 | Heat pipe |
| CN101173843A (en) * | 2006-11-01 | 2008-05-07 | 富准精密工业(深圳)有限公司 | Flexible heat pipe |
| CN102878843A (en) * | 2011-07-15 | 2013-01-16 | 富瑞精密组件（昆山）有限公司 | Heat pipe |
-
2013
- 2013-08-21 CN CN201310370053.8A patent/CN104422320B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617985A (en) * | 1984-09-11 | 1986-10-21 | United Kingdom Atomic Energy Authority | Heat pipe stabilized specimen container |
| CN1837737A (en) * | 2005-03-23 | 2006-09-27 | 富准精密工业(深圳)有限公司 | Heat pipe |
| CN101173843A (en) * | 2006-11-01 | 2008-05-07 | 富准精密工业(深圳)有限公司 | Flexible heat pipe |
| CN102878843A (en) * | 2011-07-15 | 2013-01-16 | 富瑞精密组件（昆山）有限公司 | Heat pipe |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107955849A (en) * | 2017-11-29 | 2018-04-24 | 中冶南方工程技术有限公司 | A kind of blast furnace cooling stave |
| CN110779366A (en) * | 2018-07-30 | 2020-02-11 | 株式会社理光 | Capillary wick, loop heat pipe, electronic device, porous body, and method for manufacturing capillary wick |
| EP3748273A1 (en) * | 2019-06-07 | 2020-12-09 | Ricoh Company, Ltd. | Evaporator, loop heat pipe, and electronic device |
| CN111895827A (en) * | 2020-07-16 | 2020-11-06 | 广州大学 | Thermal diode and processing method thereof |
| CN114123661A (en) * | 2021-12-03 | 2022-03-01 | 东方电气集团东方电机有限公司 | Heat dissipation method for motor sliding bearing |
| CN114440678A (en) * | 2022-02-17 | 2022-05-06 | 郭鹏杰 | Multidimensional heat pipe and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104422320B (en) | 2016-04-20 |
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