CN103453792A - Bottom enhanced heat transfer structure of gravity assisted heat pipe - Google Patents
Bottom enhanced heat transfer structure of gravity assisted heat pipe Download PDFInfo
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- CN103453792A CN103453792A CN201310353869XA CN201310353869A CN103453792A CN 103453792 A CN103453792 A CN 103453792A CN 201310353869X A CN201310353869X A CN 201310353869XA CN 201310353869 A CN201310353869 A CN 201310353869A CN 103453792 A CN103453792 A CN 103453792A
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- heat pipe
- gravity assisted
- liquid collecting
- collecting cup
- assisted heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The invention discloses a bottom enhanced heat transfer structure of a gravity assisted heat pipe. The bottom enhanced heat transfer structure of the gravity assisted heat pipe comprises a liquid collecting cup which is arranged in the cavity of the gravity assisted heat pipe, wherein a liquid outlet is arranged at a position, corresponding to a bottom heat source of the gravity assisted heat pipe, of the liquid collecting cup; a steam channel through which a vaporized working medium passes and a collected liquid channel through which a liquid working medium flows to the liquid outlet from the periphery of the liquid collecting cup are arranged on the liquid collecting cup. The bottom enhanced heat transfer structure of the gravity assisted heat pipe is simple in structure and low in cost; the heat source radiating and cooling problem caused by a temperature gradient formed at the bottom of the gravity assisted heat pipe is solved; the heat transfer efficiency and performance of the gravity assisted heat pipe are improved, so that the consumption of materials and energy sources is reduced.
Description
Technical field
The present invention relates to the gravity assisted heat pipe technical field, especially relate to a kind of gravity assisted heat pipe bottom augmentation of heat transfer structure.
Background technology
Hot pipe technique is the heat transfer element of a kind of being called " heat pipe " of George Ge Luofo (George Grover) invention of U.S. Los Alamos (Los Alamos) National Laboratory in 1963, it takes full advantage of the Rapid Thermal hereditary property of heat-conduction principle and refrigeration filling, see through heat pipe the heat of thermal objects is delivered to rapidly outside thermal source, its capacity of heat transmission surpasses the capacity of heat transmission of any known metal.
Heat pipe is widely used in the radiator manufacturing at present, for example on market, the stem stem of emerging high-power LED phase-change radiator just adopts the gravity assisted heat pipe technology, the gravity assisted heat pipe outer wall is in conjunction with radial fin, be commonly called as " heronsbill radiator ", the application for a patent for invention that can be CN103196116A referring to notification number open " for the modified gravity force heat pipe radiator of great power LED ".
The traditional gravity heat pipe mainly is comprised of shell, end cap and working medium three parts, thermal source is positioned at the lower end end caps, working medium is heated and is produced phase transformation and become the evaporation of steam state working medium, and the heat of thermal source is brought to the upper end end cap, working medium is met condensation and is formed liquid refrigerant, and low or flow to the lower end end cap along inner wall of tube shell under Action of Gravity Field.In order to promote the heat transfer property of gravity assisted heat pipe, usually at the inboard capillary structure of making of the end cap that is positioned at lower end, as metal twine, micro-group groove, foam metal material etc., the effect of these capillary structures is by capillary force, working medium to be delivered to the thermal source place of lower end end cap, and heat absorption takes away the heat of thermal source, simultaneously capillary structure also has the effect that increases heat exchange area.
Because heat is originally from high temperature to low temperature, so the condensed liquid refrigerant of low temperature will lean on gravity while by low-temperature region, flowing to high-temperature area and capillary force is auxiliary could realize.Again because there is surface tension in working medium, capillary force between capillary structure and working medium is again limited, and working medium temperature under the thermal source heat effect raises, progressively seethe with excitement and evaporate, the bubble that boiling phenomenon produces can affect the back-flow velocity of liquid refrigerant, therefore the liquid refrigerant temperature that is back to the thermal source center is the highest, minimum number.Make whole gravity assisted heat pipe in the course of the work, the heat source position of lower end end cap and marginal position form larger thermograde, and heat source temperature is higher, and lower end end cap area is larger, and thermograde is larger, are unfavorable for the cooling heat source cooling.
Summary of the invention
The deficiency existed for above-mentioned prior art, one of purpose of the present invention is the moving law according to gravity assisted heat pipe, the problem that is unfavorable for the cooling heat source cooling that provides a kind of simple in structure, cheap gravity assisted heat pipe bottom augmentation of heat transfer structure to cause with the thermograde that solves the gravity assisted heat pipe bottom, reach the heat transfer efficiency and the performance that promote gravity assisted heat pipe, and then reduce the consumption of material and the energy.
Two of purpose of the present invention is to provide the gravity assisted heat pipe of a kind of better heat transfer efficiency and performance, and it is simple in structure, and handling ease is with low cost.
Three of purpose of the present invention is to provide a kind of great power LED gravity force heat pipe radiator, and the gravity assisted heat pipe bottom adopts the augmentation of heat transfer structure, and its heat transfer efficiency is higher, heat transfer property is better.
Four of purpose of the present invention is to provide a kind of computer CPU gravity force heat pipe radiator, and the gravity assisted heat pipe bottom adopts the augmentation of heat transfer structure, and its heat transfer efficiency is higher, heat transfer property is better.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of gravity assisted heat pipe bottom augmentation of heat transfer structure, comprise the liquid collecting cup that is arranged at the gravity assisted heat pipe inner chamber, on liquid collecting cup, the position of corresponding gravity assisted heat pipe bottom thermal source is provided with leakage fluid dram, and liquid collecting cup is provided with the logical vapour passage passed for steam state working medium and supplies the collecting channel of liquid working medium from the liquid collecting cup circumferential flux to leakage fluid dram.
Wherein, described liquid collecting cup is tapered, and described leakage fluid dram is located at the corner position of taper liquid collecting cup, is laid with some described logical vapour passages on the conical surface of taper liquid collecting cup.The rim of a cup of described liquid collecting cup is provided with the retainer plate adapted with the gravity assisted heat pipe tube wall, and the edge of described logical vapour passage is provided with gear liquid limit, lays respectively at two described gear liquid limits on two adjacent logical vapour passages and the cone match of taper liquid collecting cup and forms described collecting channel.Preferably, described liquid collecting cup is conical liquid collecting cup, and some described logical vapour passages are laid in equably on the conical surface of conical liquid collecting cup centered by leakage fluid dram.
A kind of gravity assisted heat pipe, comprise shell, heat pipe top cover and heat pipe bottom, the heat pipe top cover is positioned at the upper end of shell, the heat pipe bottom is positioned at the lower end of shell, be provided with the working medium that can carry out phase-change heat transfer in shell, be provided with liquid collecting cup in described shell, on liquid collecting cup, the position of corresponding gravity assisted heat pipe bottom thermal source is provided with leakage fluid dram, and liquid collecting cup is provided with the logical vapour passage passed for steam state working medium and supplies the collecting channel of liquid working medium from the liquid collecting cup circumferential flux to leakage fluid dram.
Wherein, the rim of a cup of described liquid collecting cup and described inner wall of tube shell transition or interference fit.Preferably, described inner wall of tube shell is provided with projection or the draw-in groove for fixing described liquid collecting cup.
A kind of great power LED gravity force heat pipe radiator, comprise the gravity assisted heat pipe formed by shell, heat pipe top cover and heat pipe bottom, be laid with some fins on the lateral wall of shell, the heat pipe top cover is positioned at the upper end of shell, the heat pipe bottom is positioned at the lower end of shell, be provided with the working medium that can carry out phase-change heat transfer in shell, be provided with liquid collecting cup in described shell, on liquid collecting cup, the position of corresponding gravity assisted heat pipe bottom thermal source is provided with leakage fluid dram, and liquid collecting cup is provided with the logical vapour passage passed for steam state working medium and supplies the collecting channel of liquid working medium from the liquid collecting cup circumferential flux to leakage fluid dram.
Wherein, the rim of a cup of described liquid collecting cup and described inner wall of tube shell transition or interference fit.
A kind of computer CPU gravity force heat pipe radiator, comprise the gravity assisted heat pipe formed by shell, heat pipe top cover and heat pipe bottom, be laid with some fins on the lateral wall of shell, the heat pipe top cover is positioned at the upper end of shell, the heat pipe bottom is positioned at the lower end of shell, be provided with the working medium that can carry out phase-change heat transfer in shell, be provided with liquid collecting cup in described shell, on liquid collecting cup, the position of corresponding gravity assisted heat pipe bottom thermal source is provided with leakage fluid dram, and liquid collecting cup is provided with the logical vapour passage passed for steam state working medium and supplies the collecting channel of liquid working medium from the liquid collecting cup circumferential flux to leakage fluid dram.
After adopting technique scheme, the advantage that compared to the prior art the present invention had is:
This gravity assisted heat pipe bottom augmentation of heat transfer structure and gravity assisted heat pipe are used in conjunction with, adopt the heat transfer operation principle of gravity assisted heat pipe of this gravity heat bottom augmentation of heat transfer structure identical with the traditional gravity heat pipe, but the liquid refrigerant backflow direction difference of gravity assisted heat pipe bottom, its radiating efficiency and performance significantly improve.Particularly, adopt the gravity assisted heat pipe of this gravity assisted heat pipe bottom augmentation of heat transfer structure, liquid collecting cup is fixedly installed in to the bottom of gravity assisted heat pipe inner chamber, the rim of a cup of liquid collecting cup and gravity assisted heat pipe inner tubal wall are complementary, the leakage fluid dram of liquid collecting cup is placed in the thermal source top of installing the gravity assisted heat pipe lower end, usually thermal source is arranged on the center of gravity assisted heat pipe lower end, the heat of thermal source raises the heat pipe bottom temperature that is positioned at the gravity assisted heat pipe lower end, when reaching the phase transition temperature of working medium, the part of working medium can produce phase transformation, be that working medium transfers steam state to by liquid state, steam state working medium is evaporated and is carried heat and spreads to area of low pressure by logical vapour passage, when steam state working medium arrives the lower gravity assisted heat pipe tube wall of temperature, steam state working medium is met condensation and is formed liquid refrigerant, liquid refrigerant flows downward along the gravity assisted heat pipe tube wall under Action of Gravity Field, while flowing to the rim of a cup edge of rim of a cup of liquid collecting cup, liquid refrigerant by collecting channel from the liquid collecting cup circumferential flux to leakage fluid dram, flow to again the position of the corresponding thermal source in gravity assisted heat pipe bottom by leakage fluid dram, above-mentioned running loops.
Liquid collecting cup is bullet, leakage fluid dram is positioned on the drift angle of taper liquid collecting cup, leakage fluid dram can be independent blind bore, it can be also the mouth of the opening with some logical vapour channel connections, some described logical vapour passages are laid in equably on the conical surface of conical liquid collecting cup centered by leakage fluid dram, be convenient on the conical surface collecting channel with gradient is set, can make liquid refrigerant to flow to leakage fluid dram from the liquid collecting cup rim of a cup under Action of Gravity Field.The rim of a cup of liquid collecting cup is provided with the retainer plate adapted with the gravity assisted heat pipe tube wall, and effect is to be convenient to liquid collecting cup is fixedly installed in gravity assisted heat pipe.The edge of logical vapour passage is provided with gear liquid limit, and effect is that liquid towards working medium plays spacing guide functions, and the cone match that lays respectively at the gear liquid limit of two on two adjacent logical vapour passages and taper liquid collecting cup forms collecting channel, simple in structure, is convenient to processing and manufacturing.The area of the collecting channel on liquid collecting cup should be as far as possible little, and the area of logical vapour passage is as far as possible large, and what collecting channel rose on steam state working medium like this stops that impact is less.
This gravity assisted heat pipe bottom augmentation of heat transfer structure, low temperature liquid working medium " can be taken a shortcut " and directly is back to the thermal source center, position temperature is the highest and that be difficult to dispel the heat most uses the liquid refrigerant of minimum temperature cooling, solved the larger problem of gravity assisted heat pipe bottom temp gradient existed in the prior art, also accelerated the phase transformation circulation rate of working medium in the gravity assisted heat pipe, promoted heat-transfer capability and the efficiency of gravity assisted heat pipe simultaneously.
To sum up, the advantage applies of gravity assisted heat pipe of the present invention bottom augmentation of heat transfer structure exists:
1, gravity assisted heat pipe of the present invention bottom augmentation of heat transfer structure provides a return flow line for condensed liquid refrigerant refluxes, liquid refrigerant can directly reflux and arrive the position that structure limits, the center of evaporator section normally, this position is also the position that temperature is the highest usually, does not affect the diffusion of gaseous working medium simultaneously;
2, the liquid refrigerant refluxed has formed similar " jet " cooling augmentation of heat transfer effect to local location;
3, promote heat transfer efficiency, more effectively reduce the DIE Temperature of evaporator section, reduced the localized temperature gradients of heat point source.
4, simple in structure, be easy to adopt punch process to realize this structure, with low cost.
The advantage applies of gravity assisted heat pipe of the present invention exists: heat transfer efficiency is higher, and heat transfer property is better, can be widely used in various radiators field, promotes the technological innovation in radiator field.
The advantage applies of great power LED gravity force heat pipe radiator of the present invention exists: improve heat transfer efficiency and performance, extend the service life of great power LED.
The advantage applies of computer CPU gravity force heat pipe radiator of the present invention exists: improve heat transfer efficiency and performance, make the computer CPU running temperature lower, move more stable.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1: the perspective view of liquid collecting cup of the present invention.
Fig. 2: the perspective view of another structure of liquid collecting cup of the present invention.
Fig. 3: sectional structure schematic diagram when the present invention and gravity assisted heat pipe are used in conjunction with.
In figure, 1: shell; 2: liquid refrigerant; 3: liquid collecting cup; 4: retainer plate; 5: logical vapour passage; 6: gear liquid limit; 7: collecting channel; 8: steam state working medium; 9: leakage fluid dram; 10: working medium; 11: the heat pipe bottom; 12: thermal source.
The specific embodiment
The following stated is only preferred embodiment of the present invention, does not therefore limit protection scope of the present invention.
See shown in Fig. 1 to Fig. 3.
The corner position of conical liquid collecting cup 3 is provided with leakage fluid dram 9, and this leakage fluid dram 9 is for being opened on liquid collecting cup 3 through hole.Usually to be positioned at the temperature of ，Gai position, center of gravity assisted heat pipe lower end the highest for thermal source 12, and heat is difficult to leave most, leakage fluid dram 9 be positioned at thermal source 12 directly over, can directly reach thermal source 12 positions while making liquid refrigerant 2 reflux.
Be distributed with equably some logical vapour passages 5 on the conical surface of conical liquid collecting cup 3 centered by leakage fluid dram 9, for steam state working medium 8, pass, the edge of logical vapour passage 5 is provided with gear liquid limit 6, the two gear liquid limits 6 that lay respectively at two adjacent logical vapour passages 5 form collecting channel 7 with the cone match of conical liquid collecting cup 3, for liquid working medium 2, under Action of Gravity Field, from liquid collecting cup 3 rims of a cup, flow to leakage fluid dram 9.
Liquid collecting cup shown in Fig. 2 is as another equivalent transformation scheme of the present embodiment, and the end of collecting channel 7 is free end, and the length of its collecting channel 7 and gradient can freely be adjusted, and the end of some collecting channels 7 encloses to cover and forms open described leakage fluid dram 9.
Claims (7)
1. gravity assisted heat pipe bottom augmentation of heat transfer structure, it is characterized in that: comprise the liquid collecting cup (3) that is arranged at the gravity assisted heat pipe inner chamber, the position of the upper corresponding gravity assisted heat pipe bottom thermal source of liquid collecting cup (3) (12) is provided with leakage fluid dram (9), and liquid collecting cup (3) is provided with the logical vapour passage (5) passed for steam state working medium (8) and supplies the collecting channel (7) of liquid working medium (2) from liquid collecting cup (3) circumferential flux to leakage fluid dram (9).
2. gravity assisted heat pipe according to claim 1 bottom augmentation of heat transfer structure, it is characterized in that: described liquid collecting cup (3) is tapered, described leakage fluid dram (9) is located at the corner position of taper liquid collecting cup (3), is laid with some described logical vapour passages (5) on the conical surface of taper liquid collecting cup (3).
3. gravity assisted heat pipe according to claim 2 bottom augmentation of heat transfer structure, it is characterized in that: the rim of a cup of described liquid collecting cup (3) is provided with the retainer plate (4) adapted with the gravity assisted heat pipe tube wall, the edge of described logical vapour passage (5) is provided with gear liquid limit (6), and the two described gear liquid limits (6) that lay respectively on two adjacent logical vapour passages (5) form described collecting channel (7) with the cone match of taper liquid collecting cup (3).
4. a gravity assisted heat pipe, it is characterized in that: comprise shell (1), heat pipe top cover and heat pipe bottom (11), the heat pipe top cover is positioned at the upper end of shell (1), heat pipe bottom (11) is positioned at the lower end of shell (1), be provided with the working medium (10) that can carry out phase-change heat transfer in shell (1), be provided with gravity assisted heat pipe as described as claims 1 to 3 any one bottom augmentation of heat transfer structure in described shell (1).
5. gravity assisted heat pipe according to claim 4, is characterized in that: the rim of a cup of described liquid collecting cup (3) and described shell (1) inwall transition or interference fit.
6. a great power LED gravity force heat pipe radiator that adopts gravity assisted heat pipe as claimed in claim 4, is characterized in that: on the lateral wall of the shell of described gravity assisted heat pipe (1), be laid with some fins.
7. a computer CPU gravity force heat pipe radiator that adopts gravity assisted heat pipe as claimed in claim 4, is characterized in that: on the lateral wall of the shell of described gravity assisted heat pipe (1), be laid with some fins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310353869XA CN103453792A (en) | 2013-08-14 | 2013-08-14 | Bottom enhanced heat transfer structure of gravity assisted heat pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310353869XA CN103453792A (en) | 2013-08-14 | 2013-08-14 | Bottom enhanced heat transfer structure of gravity assisted heat pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197761A (en) * | 2014-09-15 | 2014-12-10 | 东南大学 | Strengthened heat transfer gravity assisted heat pipe |
| CN105387437A (en) * | 2015-10-30 | 2016-03-09 | 陈俊霖 | Cooling device for LED lamp |
| CN114485233A (en) * | 2022-02-28 | 2022-05-13 | 苏州浪潮智能科技有限公司 | Impact backflow type gravity thermosiphon radiator and electronic equipment |
| CN114554679A (en) * | 2022-03-17 | 2022-05-27 | 西安易朴通讯技术有限公司 | Heat radiator |
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| CN102261862A (en) * | 2011-07-01 | 2011-11-30 | 中兴通讯股份有限公司 | Flat heat pipe heat exchanger |
| CN203534297U (en) * | 2013-08-14 | 2014-04-09 | 奉化市垭特机电科技有限公司 | Strengthened heat transfer structure, gravity assisted heat pipe using same and radiator using gravity assisted heat pipe |
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| US4582121A (en) * | 1977-06-09 | 1986-04-15 | Casey Charles B | Apparatus for and method of heat transfer |
| JPS60103296A (en) * | 1983-11-10 | 1985-06-07 | Kenji Fukuda | Thermosiphone of inner descending pipe system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197761A (en) * | 2014-09-15 | 2014-12-10 | 东南大学 | Strengthened heat transfer gravity assisted heat pipe |
| CN104197761B (en) * | 2014-09-15 | 2016-02-24 | 东南大学 | A kind of augmentation of heat transfer gravity assisted heat pipe |
| CN105387437A (en) * | 2015-10-30 | 2016-03-09 | 陈俊霖 | Cooling device for LED lamp |
| CN114485233A (en) * | 2022-02-28 | 2022-05-13 | 苏州浪潮智能科技有限公司 | Impact backflow type gravity thermosiphon radiator and electronic equipment |
| CN114554679A (en) * | 2022-03-17 | 2022-05-27 | 西安易朴通讯技术有限公司 | Heat radiator |
| CN114554679B (en) * | 2022-03-17 | 2024-02-09 | 西安易朴通讯技术有限公司 | Heat dissipation device |
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