CN100489434C - Plate type integral structure heat-irradiation method and device suitable for large power high efficiency heat pipe heat-radiator - Google Patents
Plate type integral structure heat-irradiation method and device suitable for large power high efficiency heat pipe heat-radiator Download PDFInfo
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- CN100489434C CN100489434C CNB2007100350838A CN200710035083A CN100489434C CN 100489434 C CN100489434 C CN 100489434C CN B2007100350838 A CNB2007100350838 A CN B2007100350838A CN 200710035083 A CN200710035083 A CN 200710035083A CN 100489434 C CN100489434 C CN 100489434C
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Abstract
The plate-type integral structure heat emission method and device apply to high power highly effective heat pipe radiator, it machines the flat plate-type integral inner frame of evaporator section into capillary imbibitions core structure through the method of agglomeration, the contacting site of capillary imbibitions core on the inner frame heating surface is located with vertical microflute (the width is 1-3mm) which opening towards up, the microflutes are connected with the flat plate inner frame of upper condenser section to form the heating gaseous actuating medium channel in heat pipe-type. It also machines the condenser section into flat plate inner frame which is located under the evaporator section, the inner surface is inner frame is located with vertical microflute to play a role of liquid actuating medium capillary flow-returning channel. The outer is distributed with heat emission fins which are installed horizontally or vertically to meet the requirements of horizontal or vertical ventilation.
Description
Technical field
The present invention relates to a kind of heat dissipation technology of power device, especially a kind of improvement of board-like integral heat sink structure of power device, international Patent classificating number is F28F9/26 and H05K7/20, and this board-like overall structure heat dissipating method is mainly used in high power semiconductor component with dispelling the heat.
Background technology
Use semiconductor element to make switching device in power rectifier (unsteady flow) device, in order to reduce the quantity of single bridge arm unit parallel connection, all trend towards using big element, as the use for electric locomotive fairing by an original brachium pontis with 62 inches IGCT series and parallels, a brachium pontis is till now only used 5 inches IGCTs, and the heating power consumption of single semiconductor element reaches thousands of watts.So, require supporting radiator that higher heat-sinking capability is arranged, and will in limited space, realize heat radiation.Because it is energy-efficient that heat-pipe radiator has, so, had in high power semiconductor component heat radiation field and to have used widely and develop.
The general at present heat-pipe radiator that uses is made up of circular heat pipe, radiating fin and substrate (fixedly heater element), and advantage is a technology maturation.Its weak point: because heat pipe is a kind of assembly structure with being connected of fin and substrate, in the very little application scenario of thermal resistance requirement of radiator, the thermal contact resistance influence is bigger, is subjected to the influence of technology also bigger, and radiating efficiency is restricted; In addition, the arrangement by many heat pipes realizes the transmission of big thermal power, and the temperature of substrate can be inhomogeneous, increase with power to become greatly, and be disadvantageous to the influence of semiconductor element.
Adopt board-like overall structure to solve the aforesaid drawbacks, and can increase the radiating efficiency of evaporator section isothermal heat transfer area and condensation segment fin.But because the liquid refrigerant loop distribution has certain limitation to the correlation technique of evaporating surface, so present plank frame adopts the boiling heat transfer of horizontal positioned mostly, its shortcoming is that liquid refrigerant is more, and the thermal conductivity of liquid refrigerant itself is relatively poor.In some application scenarios, evaporating surface is vertical, by the imbibition core liquid refrigerant of bottom is overcome gravity and upwards is drawn onto and has suffered evaporating surface, can only satisfy less heat radiation power requirement, has limited board-like integrally-built application.The present invention is exactly a kind of solution at this problem.
Summary of the invention
The objective of the invention is in order to solve board-like overall structure and to adopt the boiling heat transfer method, the characteristics of the liquid refrigerant poor thermal conductivity that is embodied, develop and a kind ofly can satisfy the vertically arranged demand of evaporating surface, and adapt to the New-type plate overall structure heat dissipating method and the device of big heat radiation power requirement.
The objective of the invention is to be achieved through the following technical solutions: use the method for sintering to form capillary wick structure the flat whole inside casing of evaporator section, capillary wick is covered with vertical microflute in the contact position of inside casing heating face, and (width is 1～3mm), microflute is towards upper shed, and the dull and stereotyped inside casing of the condensation segment on connection top, form the gaseous working medium passage that heat pipe-type dispels the heat.
Condensation segment is also made flat inside casing, be positioned at the evaporator section top, the vertical microflute of inner surface distribution of condensation segment inside casing, the capillary return flow line of playing liquid refrigerant.The outside distribution radiating fin of condensation segment, radiating fin level or be arranged vertically the requirement that can distinguish adaptation level or vertical ventilation.
When topping up attitude working medium, guarantee that liquid refrigerant oozes the capillary wick of full evaporator section, liquid level is a little more than the capillary wick highest point.
The structure of described board-like integrally-built heat-pipe radiator is: the evaporator section inside casing forms capillary wick with powder sintered method, capillary wick and the contact position of heating face form the vertical microflute of evaporator section of upper opening, the microflute width is 1～3mm, and evaporator section outer circular table top is the rest area of heater element; The inner surface of the inside casing of the condensation segment vertical microflute that distributes, microflute plays the capillary channel that liquid refrigerant refluxes, and the outside distribution radiating fin of condensation segment is done horizontally disposedly under the horizontal ventilation condition, and radiating fin is done and is arranged vertically during corresponding vertical ventilation condition.
Operation principle of the present invention is: during thermal starting, contact-making surface is a metal around the liquid refrigerant in the vertical microflute of evaporator section inside casing, the thermal conductivity of metal well heats liquid refrigerant simultaneously, liquid refrigerant in the microflute is again a trace, so just overcome the problem of liquid refrigerant heat conductivility difference, make the temperature difference of liquid refrigerant and hot zone less, realize the efficient phase-change heat-exchange of heat pipe.Usually used circular heat pipe also is to utilize surperficial capillary imbibition effect, makes the thin liquid refrigerant of surface distributed one deck, makes having a narrow range of temperature of itself and tube wall, so reduces the influence of liquid refrigerant heat conductivility difference, gives full play to the efficient feature of phase-change heat-exchange.The liquid refrigerant of these vertical microflutes is phase-changed into gaseous working medium and is full of microflute very soon, upwards enter condensation segment, exothermic phase liquefy working medium is got back to evaporator section along surperficial capillary return flow line (microflute), be stored in capillary wick, constantly replenish the liquid refrigerant at microflute place, the microflute of this moment same circular heat pipe such as just, by the capillary suction-operated with liquid refrigerant absorption from the teeth outwards.
Description of drawings
Fig. 1 is an embodiment of the invention front view;
Fig. 2 is an embodiment of the invention A-A section plan view;
Among the figure: 1, evaporator section, 2, the evaporator section inside casing, 3, condensation segment, 4, the condensation segment inside casing, 5, radiating fin, 6, the vertical microflute of evaporator section, 7, capillary wick.
The specific embodiment
Accompanying drawing has provided one embodiment of the present of invention principle schematic, can be applicable to the heat radiation of high-power thyristor element, and the invention will be further described below in conjunction with drawings and Examples.
As can be seen, the present invention makes rectifier can use board-like integrally-built heat-pipe radiator with 5 inches IGCTs (rectifying tube), satisfies the heat radiation requirement of high power semiconductor component best from accompanying drawing.
The present invention is applicable to the board-like overall structure heat dissipating method of large power high efficiency heat-pipe radiator, be to use the method for sintering to form capillary wick structure the flat whole inside casing of evaporator section, capillary wick is covered with vertical microflute in the contact position of inside casing heating face, towards upper shed, the dull and stereotyped inside casing that is communicated with the condensation segment on top forms the gaseous working medium passage that heat pipe-type dispels the heat; Condensation segment is also made flat inside casing, be positioned at evaporator section top, the inner surface of the inside casing vertical microflute that distributes, the capillary return flow line of playing liquid refrigerant, outside distribution radiating fin, level or be arranged vertically the requirement of distinguishing adaptation level or vertical ventilation.
This board-like integrally-built heat-pipe radiator comprises evaporator section 1, condensation segment 3.The powder sintered method of evaporator section inside casing 2 usefulness forms capillary wick 7, forms the vertical microflute 6 of evaporator section of upper opening with the contact position of heating face, and microflute 6 width are 1～3mm, and the outer circular table top is the rest area (shown in the double dot dash line circle) of heater element.The inner surface of the inside casing 4 of the condensation segment 3 vertical microflute that distributes plays the capillary channel that liquid refrigerant refluxes, outside distribution radiating fin, do under the horizontal ventilation condition horizontally disposed as legend, but corresponding vertical ventilation radiating fin changes into vertically.Cardinal principle is:
The heat that IGCT (rectifying tube) produces when starting working reaches inside casing by evaporator section 1 table top, liquid refrigerant heat absorption in the vertical microflute 6 of evaporator section is phase-changed into gaseous working medium, upwards flow into condensation segment inside casing 4, be phase-changed into liquid refrigerant after the heat release cooling, get back to the capillary wick 7 of evaporator section under the effect by gravity and condensation segment inside casing 4 surperficial microflute capillary imbibition power, add to microflute, realize circulation.
When filling liquid refrigerant, be full of capillary wick, under given heat radiation power, not occur drying up.Along with the increase of heating power, be full of gaseous working medium in the vertical microflute 6 of evaporator section, because one deck liquid refrigerant is adsorbed on capillary suction-operated surface, be equivalent to the situation of circular heat pipe all around.
Claims (4)
1, is applicable to the board-like overall structure heat dissipating method of large power high efficiency heat-pipe radiator, it is characterized in that: use the method for sintering to form capillary wick structure the flat whole inside casing of evaporator section, capillary wick is covered with vertical microflute in the contact position of inside casing heating face, microflute is towards upper shed, and the dull and stereotyped inside casing of the condensation segment on connection top, form the gaseous working medium passage that heat pipe-type dispels the heat; Condensation segment is also made flat inside casing, be positioned at the evaporator section top, the vertical microflute of inner surface distribution of condensation segment inside casing, play the capillary return flow line of liquid refrigerant, the outside distribution radiating fin of condensation segment, radiating fin level or be arranged vertically is with the requirement of adaptation level or vertical ventilation respectively.
2, the board-like overall structure heat dissipating method that is applicable to the large power high efficiency heat-pipe radiator as claimed in claim 1, it is characterized in that: when topping up attitude working medium, guarantee that liquid refrigerant oozes the capillary wick of full evaporator section, liquid level is a little more than the capillary wick highest point.
3, a kind of described device that is applicable to the board-like overall structure heat dissipating method of large power high efficiency heat-pipe radiator of claim 1 of realizing, comprise evaporator section, condensation segment, it is characterized in that: described evaporator section inside casing forms capillary wick with powder sintered method, capillary wick and the contact position of heating face form the vertical microflute of evaporator section of upper opening, and evaporator section outer circular table top is the rest area of heater element; The inner surface of the inside casing of the condensation segment vertical microflute that distributes, microflute plays the capillary channel effect that liquid refrigerant refluxes, and the outside distribution radiating fin of condensation segment is done horizontally disposedly under the horizontal ventilation condition, and radiating fin is done and is arranged vertically during corresponding vertical ventilation condition.
4, the device that is applicable to the board-like overall structure heat dissipating method of large power high efficiency heat-pipe radiator as claimed in claim 3 is characterized in that: described capillary wick is 1～3mm with the vertical microflute width of evaporator section that the contact position of heating face forms upper opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100350838A CN100489434C (en) | 2007-06-08 | 2007-06-08 | Plate type integral structure heat-irradiation method and device suitable for large power high efficiency heat pipe heat-radiator |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100350838A CN100489434C (en) | 2007-06-08 | 2007-06-08 | Plate type integral structure heat-irradiation method and device suitable for large power high efficiency heat pipe heat-radiator |
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| CN101059323A CN101059323A (en) | 2007-10-24 |
| CN100489434C true CN100489434C (en) | 2009-05-20 |
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| CNB2007100350838A Expired - Fee Related CN100489434C (en) | 2007-06-08 | 2007-06-08 | Plate type integral structure heat-irradiation method and device suitable for large power high efficiency heat pipe heat-radiator |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102098904B (en) * | 2011-02-28 | 2012-12-26 | 株洲南车时代电气股份有限公司 | Anti-burning heat radiating device and method of electronic components |
| CN102878845A (en) * | 2012-09-18 | 2013-01-16 | 华南理工大学 | Inner groove porous strengthened boiling micro-channel structure, manufacture method and application |
| CN104902727B (en) * | 2015-05-26 | 2018-06-19 | 华为技术有限公司 | The center and mobile terminal of a kind of mobile terminal |
| CN104994709B (en) * | 2015-07-09 | 2017-06-20 | 长沙理工大学 | The board-like integral heat pipe of electric magnetic iron remover heat transmission |
| CN104994710B (en) * | 2015-07-09 | 2017-06-20 | 长沙理工大学 | Electric magnetic iron remover heat transmission disc type integral heat pipe |
| CN106197103A (en) * | 2016-07-04 | 2016-12-07 | 中国科学院大学 | A kind of loop circuit heat pipe and using method |
| CN107801351B (en) * | 2016-09-05 | 2023-08-01 | 宏碁股份有限公司 | Evaporator and manufacturing method thereof |
| CN107863330B (en) * | 2017-10-27 | 2019-03-01 | 西安交通大学 | A kind of grade micro-channel liquid cooling plate |
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