CN102326046A - Flat heat pipe - Google Patents
Flat heat pipe Download PDFInfo
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- CN102326046A CN102326046A CN2010800088915A CN201080008891A CN102326046A CN 102326046 A CN102326046 A CN 102326046A CN 2010800088915 A CN2010800088915 A CN 2010800088915A CN 201080008891 A CN201080008891 A CN 201080008891A CN 102326046 A CN102326046 A CN 102326046A
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- core
- heat pipe
- container
- fine rule
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- 239000012530 fluid Substances 0.000 claims abstract description 53
- 239000007791 liquid phase Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 7
- 230000005494 condensation Effects 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 4
- 238000003892 spreading Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 19
- 238000001704 evaporation Methods 0.000 abstract description 7
- 230000008020 evaporation Effects 0.000 abstract description 7
- 230000000052 comparative effect Effects 0.000 description 14
- 239000012224 working solution Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 238000010992 reflux Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000005242 forging Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000007872 degassing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000005499 meniscus Effects 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical group O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0233—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the conduits having a particular shape, e.g. non-circular cross-section, annular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
Disclosed is a flat heat pipe that is thin and has an excellent heat transport property even when a deformation such as bending is applied. This heat pipe encloses an operating fluid which evaporates and radiates heat when heated and then condenses, and is provided with a wick which generates capillary force which returns the liquid-phase operating fluid to the position where the fluid evaporates; wherein the wick, which is formed as a bundle with which multiple fine wires (1) are bundled as a fine wire bundle (2) that is twisted around the center axis line thereof, is disposed touching both the top and bottom faces or the side faces within a flat container, and is disposed over the entire length in the longitudinal direction so as not to block the space which is an evaporation flow path, and either of the portions where the wick and the container make contact is sintered and immobilized over the entire length in the longitudinal direction.
Description
Technical field
The present invention relates to constitute and utilize the working fluid that is sealing into container (container) inside to come the heat pipe of transfer heat; Particularly relate to being configured for producing and make working fluid be back to the core (wick) of the capillary force of evaporation part, and constitute the heat pipe of flat pattern as a whole by the fine rule bundle.
Background technology
The basic structure of heat pipe does; In the inside of the gas of not concretives such as air having been carried out the container of degasification; To in as the temperature range of target, evaporate and fluid such as water of condensation, ethanol is enclosed as working fluid; And then at the set inside core of container, the capillary force that is used to make the working fluid of liquid phase to reflux with generation.Therefore, in heat pipe, this working fluid evaporates by heat from the outside, dispels the heat and condensation after flowing in the low position of pressure at this steam.Its result, working fluid utilizes its latent heat to come transfer heat.And the working fluid of condensation is impregnated into core.On the other hand, owing to produce capillary force, make the working fluid that is impregnated into core be back to the position that evaporation takes place because of this capillary force based on core in the position that evaporation takes place.
Like this, can be in heat pipe in the evaporation part of transmitting heat from the outside, with working fluid is produced vapor stream between the radiating part of outside heat radiation, and generation towards with the rightabout flow of vapor stream.Its result is transfer heat continuously.Therefore, for the hot conveying capacity that improves heat pipe or reduce resistance to heat, and preferably make vapor stream and flow swimmingly or necessity produce fully.In addition, the purposes of heat pipe is diversified, for example is used in the cooling of electronic instrument sometimes, under the situation of that kind, preferably cooperates the miniaturization of this electronic component or circuit, makes the also small-sized lightness of heat pipe.
Therefore, the stream of guaranteeing to be used for vapor stream or the reflux characteristic that improves working solution are arranged in exploitation in the past, and then for the various technology of miniaturization.For example in order to increase the capillary force that is used to make working solution to reflux, and carry out the method that many fine rules that harness is made up of copper or carbon etc. constitute core.This example is recorded in TOHKEMY 2004-53186 communique, TOHKEMY 2000-74579 communique or TOHKEMY 2003-247791 communique.That is, because the more little then capillary force of actual capillary radius in the meniscus that the liquid level of working solution forms is big more, so if the harness fine rule forms core, thereby then fine rule interval each other diminishes and can access bigger capillary force.In addition, become smooth and easy and continuous stream owing to be formed at the stream of fine rule working solution each other, therefore the flow resistance with respect to working solution relatively diminishes, and sees from this aspect, improves the reflux characteristic of working solution.
So, usually in the core that constitutes by the fine rule bundle owing to form the stream of working solution each other at fine rule, so fine rule each other with use adhesive etc. and not bondedlyly the degree of harness carry out harness.For example, in the heat pipe that TOHKEMY 2004-53186 communique is put down in writing,, utilize these spiral helicine parts to fetter the fine rule bundle thus through the fine rule bundle being configured in the inside of helical parts such as helical spring.In addition, in the heat pipe that TOHKEMY 2000-74579 communique is put down in writing, recess is formed the sheet material of groove shape, and the fine rule bundle is configured in the inside of this recess, keep fine rule not scatter thus through internal configurations at pipe.In addition, in TOHKEMY 2003-247791 communique, record following structure: many superfine wires are made and twisted thread as wire harness, and this is twisted thread be inserted into the inside of barrel.Promptly; In the structure that TOHKEMY 2004-53186 communique or TOHKEMY 2000-74579 communique are put down in writing; With respect to the method for using helical spring or sheet material in order to fetter fine rule in advance; In the structure that TOHKEMY 2003-247791 communique is put down in writing, be the bound state that keeps superfine wire through afterturn.
On the other hand, in TOHKEMY 2001-208489 communique, record the technology of the stream that is used to guarantee working fluid steam.The heat pipe that this TOHKEMY 2001-208489 communique is put down in writing is the flat heat pipe that pipe is pushed and makes the pipe attenuation; Constitute: metal net shaped core what is called longitudinally is assembled to the inside of container, and is fixed in container through this metal net shaped core being stitched weldering.Therefore,, can prevent that also core is crooked and core is contacted with the internal face of interior all sides in the direction of bending radius along container even if under the situation that this heat pipe is crooked, or steam off stream etc. thus.
And; As above-mentioned TOHKEMY 2004-53186 communique, TOHKEMY 2000-74579 communique or TOHKEMY 2001-208489 communique are put down in writing; Carried out through along its radial compression the thickness of the heat pipe that the method, particularly TOHKEMY 2000-74579 communique of its flattening put down in writing being made into below the 1.5mm heat pipe in the past.In addition, in japanese kokai publication hei 11-173777 communique, record and can thickness be made the heat pipe below the 1mm.
As TOHKEMY 2004-53186 communique, TOHKEMY 2000-74579 communique are put down in writing; When helical spring or above-mentioned sheet material are used as crimp; Then this part makes thickness or external diameter that core is whole become big, so be unfavorable for making the attenuation of platypelloid type heat pipe.Relative therewith; As TOHKEMY 2003-247791 communique is put down in writing; Keeping through afterturn in the structure of bound state; Therefore do not use the part of crimp that the external diameter of core is diminished, as TOHKEMY 2001-208489 communique or japanese kokai publication hei 11-173777 communique are put down in writing, help making the situation of heat pipe flattening.
Yet; Under the situation that fine rule Shu Zuowei core is used; Because spread all over the mode of the total length assembling of container disposes with the inside at container; Therefore, preferably, TOHKEMY 2000-74579 communique or TOHKEMY 2001-208489 communique fix core as putting down in writing even if in order under the situation of giving distortion such as bending, also to guarantee vapor flow path fully.Yet as TOHKEMY 2000-74579 communique was put down in writing, if in being formed at the recess of sheet material, accommodate the fine rule bundle, the key factor that this sheet material not only becomes the number of components increase also became the reason that makes flat heat pipe thickening.In addition, as TOHKEMY 2001-208489 communique is put down in writing,, then have no alternative but to carry out extremely difficult operation or adopt special method for making if utilize the seam weldering that core is engaged with the inner surface of container.
Summary of the invention
The present invention is conceived to above-mentioned technical task make, even if its purpose is to provide distortion such as a kind of generation bending, hot conveying characteristic is the heat pipe of excellent platypelloid type also.
The present invention to achieve these goals; A kind of platypelloid type heat pipe is provided, utilizes to be heated and to evaporate and dispel the heat and the working fluid of condensation comes transfer heat, this platypelloid type heat pipe is characterised in that; Possess: container, it is configured as flat and inclosure has above-mentioned working fluid; Core; It is made up of the fine rule bundle, and the above-mentioned working fluid through liquid phase soaks into and produce capillary pressure, and wherein above-mentioned fine rule bundle is with many fine rule harnesses and to make these fine rules be that the center is twisted to close and formed with its central axis; The above-mentioned core that constitutes by above-mentioned fine rule bundle; With with the said vesse of flat in upper and lower surface or the state of flanked, and the total length setting that spreads all over the length direction of said vesse with the mode of not stopping up as the space of vapor flow path, in addition; Part arbitrarily in the part that above-mentioned core and said vesse join, the total length of the length direction through spreading all over above-mentioned core is carried out sintering and is fixed.
Above-mentioned fine rule of the present invention can be made up of copper cash.
In addition, preferably, above-mentioned fine rule bundle is carried out The pre-heat treatment so that become linearity, and above-mentioned The pre-heat treatment also can be an annealing in process.
In addition, said vesse of the present invention can be extruded under the state of the central portion that above-mentioned fine rule bundle is configured in aforementioned tube and be configured as flat.
According to the present invention; Because core is made up of the fine rule bundle with the fine rule harness; So the actual capillary radius soaking into through working fluid on the meniscus that is produced diminishes, its result can access the bigger capillary force that the working fluid that is used to make liquid phase refluxes.In addition, owing to the backflow road that forms smooth and easy and continuous working fluid at fine rule each other, so the flow resistance of working fluid diminishes.In addition,,, therefore can reduce necessary number of components, and be difficult to hinder the mobile of liquid phase working fluid and working fluid steam in container as heat pipe so need not be used to fetter the parts of fine rule because the fine rule bundle is that harness fine rule and afterturn form.Particularly make fine rule Shu Chengwei linearity, make the mobile smooth and easy of working fluid thus through carrying out The pre-heat treatment.Above-mentioned result is, improves through the reflux characteristic that makes the liquid phase working fluid, and makes the mobile smooth and easy of working fluid, can improve thus as the whole hot conveying characteristic of heat pipe.In addition,, and need not to be used for the parts of this constraint, relatively reduce so can make, so can make under the flat situation of container, make the thickness of container unexistent so thin in the past as the whole external diameter of core because core is made up of many fine rules of harness.In other words, even if constituting under the flat situation, also can guarantee excellent hot conveying characteristic.In addition, can become under the flat situation for the pipe of circle pushes, at the central portion configuration fine rule bundle of this pipe, utilize the excessive distortion (depression) of the central portion that the fine rule bundle can killer tube thus through in advance at pair cross-section.
In addition; Even if container is given distortion such as bending; Owing to being fixed on its inner core along with container is out of shape; So can avoid in advance or suppress core pars intermedia location dislocation and contact with the inner surface of container, or follow in this and produce inaccessible space in the inside of container and the situation such as mobile of the fluid steam that hinders one's work, thereby guarantee vapor flow path reliably along core.And core spreads all over its inner surface that is fixed in container endlong.For this is fixed, also can under the state that core is inserted into internal tank, carry out sintering and fix, the property made is good.According to above situation, can easily obtain the excellent heat pipe of hot conveying characteristic.
Description of drawings
Fig. 1 is the figure of process that schematically representes to make the core of heat pipe involved in the present invention.
Fig. 2 is semi-finished product that is the cutaway view of circular heat conduit in the manufacture process of platypelloid type heat pipe involved in the present invention.
Fig. 3 is the figure of cross sectional shape of an example of expression platypelloid type heat pipe involved in the present invention.
Fig. 4 is the figure of cross sectional shape of another example of expression platypelloid type heat pipe involved in the present invention.
Fig. 5 is the figure that is used to explain to the method for the attribute testing of embodiment and comparative example.
Fig. 6 is result's the chart of heat input quantity and the relation between the resistance to heat of the expression heat pipe of measuring embodiment and comparative example 2.
Fig. 7 is the sketch map of relative position relation of representing container and the core of platypelloid type heat pipe involved in the present invention respectively with linear state and case of bending.
Fig. 8 representes not core is implemented The pre-heat treatment and do not spread all over the sketch map of the relative position relation of container and core under the situation that total length fixes with linear state and case of bending respectively.
Fig. 9 is a sketch map of representing the relative position relation of container and core under the situation of a part of a fixed core respectively with linear state and case of bending.
The specific embodiment
Next the present invention is explained more specifically.The present invention is the heat pipe that the structure of core has characteristic.Particularly, the core of heat pipe involved in the present invention does not use crimp and by being constituted by many fine rules of harness.This fine rule is so long as metal wires such as copper, carbon fiber etc., and the excellent fine rule of wettability that is sealing between the working solution of internal tank gets final product.In addition, these fine rules are in order to keep bound state, and under the state of constraint, are that the center is by afterturn with its central axis.Therefore this is for the bundle that makes fine rule does not scatter, and preferably keeps the shape after the afterturn as fine rule, for example metal fine such as preferred copper cash.
In the present invention, the fine rule bundle that afterturn the is above-mentioned and core that constitutes is disposed at the inside of container, and fix through sintering, then at the inside of this container inclosure working fluid.This container is the container with bubble-tight hollow in a word, and the heat pipe that supplies between the position that is separated from each other, to carry out the purposes of heat delivery is to use hollow tube.Because this container needs to transmit heat between the portion and outside within it, so preferably be made up of the high material of pyroconductivity, for example preferably uses copper pipe.In addition, form the stream of working solution, also can form the groove of the narrow width that produces capillarity in addition at the inner surface of container.
The above-mentioned fine rule bundle of afterturn and the core that constitutes is fixed on the inner surface of this container.Particularly,, between core and container, produce sintering thus, thereby both are engaged through under the state of the inside that core is disposed at container, being heated to the temperature of regulation.The so-called remaining space of removing behind the core of internal tank becomes the vapor flow path that working fluid steam flows.
On the other hand, working fluid is to evaporate through being heated, and dispels the heat and condensation, with the fluid of the form transfer heat of latent heat, can select aptly according to the temperature of using heat pipe.If example is given one example, then water, ethanol, replacement freon etc. use as working fluid.This working fluid is carrying out being sealing into internal tank under the state of degasification to not concretive gas such as air from internal tank.
Therefore, in heat pipe involved in the present invention, when the part to container heated and cools off another part, then working fluid was heated and evaporates, and this steam flows to temperature and the low position of pressure, dispels the heat and condensation then.This vapor flow path is the stream along core, because core is fixed in the inner surface of container through sintering, so even if heat pipe applied distortion such as bending; Vapor flow path is also guaranteed; Its result, mobile necessity of working fluid steam is carried out fully, and the hot conveying characteristic of heat pipe becomes good.
On the other hand, condensed working fluid is impregnated into core, as stream, is flowed towards the position that produces evaporation in the fine rule gap each other that constitutes core.That is, when working fluid evaporates, reduce owing to be formed at the fine rule meniscus each other of core, follow the capillary force in this so produce, as pump power, the working fluid of liquid phase is back to evaporation part one side with this capillary force.Then, produce bigger capillary force owing to fine rule gap each other is less, it is good that so-called reflux characteristic becomes.In addition; The fine rule that constitutes core spreads all over its total length and continuously; And carry out fastening position owing to being not used in constraint fine rule bundle, so it is the so-called backflow road that is formed between these fine rules is also continuous swimmingly, less with respect to the resistance that flows of liquid phase working fluid by therefore; Put from this, it is good that reflux characteristic becomes.And, because core fixedly is to carry out through sintering, so, then can core spread all over its total length and fixes, thereby this processing ease manufacturing property becomes good if will be inserted into the inside of pipe and from external heat as twisting thread of core.
Next, an example of heat pipe involved in the present invention is explained with manufacturing approach.The many fine rules 1 that at first, shown in Fig. 1 (a), will become core carry out harness.This fine rule 1 particularly is that diameter is the copper cash about 0.05mm, with 100～400 copper cash harnesses.Then, shown in Fig. 1 (b), be that afterturn is carried out at the center with this fine rule bundle 2 with its central axis.Thus, each fine rule 1 keeps the state of constraint each other.Be that fine rule bundle 2 does not need special crimp and keeps its form.Then, form core through the length that this fine rule bundle 2 is cut into regulation.In addition, be wound at fine rule under the situation of coil, curved trace is arranged because of residual stress is residual sometimes, become linearity so heat-treat.
On the other hand, the wall thickness that cleanings such as degreasing have been carried out in preparation is that 0.3mm, external diameter are the pipe of 3.0～6.0mm, and pipe is cut into the length of regulation and makes container 3.Using under the situation of copper cash as core 4, using copper pipe as container.Then, above-mentioned fine rule bundle 2 is inserted into the inside of this container 3 as core 4.At this moment, the fine rule bundle 2 that is inserted is arranged on the lower surface of container 3 with linearity because of gravity in container 3.Like this, the container that is inserted with core 43 is remained the state of approximate horizontal and put into heating furnace (not shown) and heat.This heating-up temperature at container 3 and core 4 for being about 1000 ℃ under the situation made of copper, thus core 4 spread all over its endlong sintering at the inner surface of container 3, thereby be fixed.In addition, also there are simultaneously copper cash sintering and situation about engaging each other.This state is recorded in Fig. 2 as cutaway view.
After the container that will be fixed with core 43 takes out from heating furnace and cools off, one end thereof is carried out die forging processing, and this end is welded and sealed.That is, carry out the welding of die forging processing of so-called bottom and bottom.Process in the lump with these in addition, carry out the die forging processing (being top die forging processing) of the other end.So just process substantial container.
Owing to process through carrying out the top die forging, and form the nozzle-like part, so utilize nozzle-like partly to carry out fluid injection in an end of container 3.That is, working fluid is injected into the inside of container.In this case; Need carry out degasification to not concretive gas such as air from container; Therefore fluid injection also can utilize following known method in the past to carry out, that is: vacuum degassing after, inject the method for working solution and working solution is seethed with excitement and the method for discharge not concretive gas etc.Then, be used for fluid injection and after the part of opening, weld and seal in extruding.Carry out so-called welded top.
Used at material under the situation of the circular pipe in cross section, as stated, the heat pipe of the tubular type of manufacturing has been become the platypelloid type heat pipe along its radial compression as container 3.In this case, becoming the platypelloid type heat pipe of linearity, is that heat pipe with tubular type directly pushes and makes its flattening.Relative therewith, in order to make the platypelloid type heat pipe of bending or bending, be the shape that makes the heat pipe bending of tubular type or be bent into regulation, radially push and flattening then.In addition, using under the flat situation of pipe in cross section, just can access the platypelloid type heat pipe without the above-mentioned operation that is used to push as the material of container 3.The inner surface up and down that in this case, also can be used to make core 4 be close to container 3 push processing.As stated; Even if under the situation of or bending crooked at the platypelloid type heat pipe that makes manufacturing; Because the core 4 that constitutes by twisting thread is to be fixed through the inner surface that is sintered in container 3, so as one man be out of shape with the distortion of container 3, its result has guaranteed the vapor flow path 5 along core 3.
Platypelloid type heat pipe involved in the present invention, owing to fine rule bundle 2 need not the parts that are used to fetter as core 4, thus can be very thin, in addition because core 4 is to be fixed through the inner surface that is sintered in container 3, so can guarantee vapor flow path 5 effectively.For example in Fig. 3 with such shown in the cutaway view, as stated, the core 4 in the heat pipe 10 constitutes through many fine rules are carried out afterturn under the state of harness.In addition, container 3 forms the hollow flat shape, and working fluids such as water is arranged are enclosed by portion within it.This container 3 can be processed for example copper pipe along its radial compression.In addition, in example shown in Figure 3, be formed with many strias 11 along axis direction at the inner peripheral surface of container 3.These strias 11 are brought into play function as core, in addition, enlarge the contact area of working fluid and container 3 through these strias 11.
Then, dispose core 4 at the central portion of the width of the container 3 of flat pattern, this core 4 contacts with the so-called upper and lower surfaces of container 3 and is clamped by these faces, and spreads all over total length and be fixed through being sintered in these faces.Therefore, owing between the inner surface of core 4 and container 3, do not have inserting but both directly contact, so this just makes the thickness attenuation of heat pipe integral body.In addition, the inside of container 3 is that the center is divided into left and right sides two parts with core 4, and the hollow space of its left and right sides becomes the stream 5 of working fluid steam.This so-called vapor flow path 5, in the fabrication stage of heat pipe, container 3 is linearities with core 4, certainly, forms thus with desired the same.In addition, under with the situation after this container 3 (being heat pipe) bending because core 4 is along container 3 configuration and be fixed, so and the distortion of container 3 as one man be out of shape.In other words, owing to do not have core 4 and situation such as the inner surface of interior all sides of crooked container 3 contacts, so that vapor flow path 5 is guaranteed to when making originally is the same, its result the mobile of fluid steam that can not hinder one's work.
Like this; The platypelloid type heat pipe involved in the present invention that Fig. 3 representes; Fetter the core of fine rule through built-in through harness and afterturn fine rule, just can make the heat pipe of thinner thickness, strong and the backflow road of the continuous swimmingly each other working solution of fine rule except the capillary force that can guarantee core 4 in addition; Even if under the situation that applies distortion such as bending, also can guarantee the stream of working fluid steam, therefore can hot conveying capacity be brought up to unexistent in the past degree.
In addition, in the present invention, heat pipe is being constituted under the situation of flat pattern, core 4 is except the central portion that is configured in the container width direction, and is as shown in Figure 4, and any side disposes about also can being biased to.Even if under the situation that becomes such structure, also can access the roughly the same performance of heat pipe of the structure of representing with above-mentioned Fig. 3.
Embodiment
Then, embodiments of the invention are described with comparative example.
(embodiment)
Harness is from the fine rule of the copper of coil of material extraction and cut-out; And afterturn and constitute core is implemented The pre-heat treatment such as so-called annealing so that it becomes linearity to this core, with this core be inserted into as wall of a container thick for 0.3mm, external diameter be the inside of the copper pipe of 4.0mm; And adopt above-mentioned method to process heat pipe; Wherein this container is formed with a plurality of strias along axis direction at inner peripheral surface, and then this heat pipe is squeezed into thickness 1mm, has formed the platypelloid type heat pipe.This core is configured in the central portion of the width of container, and is fixed as one through being sintered in container.Total length is 100mm, and working fluid makes water.
(comparative example 1)
Except not carrying out the above-mentioned preliminary treatment to core, thereby all the other and the foregoing description have been processed the platypelloid type heat pipe equally.
(comparative example 2)
Substitute the structure of utilizing many fine rules made of copper of helical form lines body (so-called helix tube) constraint, and utilize helix tube that the inner peripheral surface that many copper fine rules are crimped on container is kept, thereby constituted core by these fine rules.Only be the structure of core with the difference of the foregoing description, other structures are same as the previously described embodiments.
(comparative example 3)
The fine rule of the copper of harness linearity utilizes helix tube harness fine rule and forms core, thereby the heat pipe of platypelloid type is processed in the inside that core is inserted into container.The structure of comparing core only with above-mentioned comparative example 2 is different, and other structure is identical with above-mentioned comparative example 2.
(test method)
As shown in Figure 5; Be configured as follows: make as an end of the heat pipe 10 of subjects and the surface (25mm * 15mm) contact of electric heater 15; And (upper surface of 64mm * 40mm * 1.5mm) contacts, and then thermal insulation board 17 is contacted with the lower surface of this heat sink 16 to make the other end of this heat pipe 10 and the heat sink 16 of aluminum.Through at room temperature 15 energisings come an end of heat hot conduit 10 to above-mentioned electric heater, and measured the temperature T c of the other end P2 of temperature T h and the heat pipe 10 of this electric weight (heat input quantity Q), electric heater 15 and the contact point P1 of heat pipe 10.According to these measurement data obtained resistance to heat about each heat pipe (℃/W) and the maximum heat input quantity (W) in not producing the so-called scope that parches.In addition, resistance to heat R obtains and is (R=(Th-Tc)/Q).In addition, about the heat pipe of embodiment and the heat pipe of comparative example 1, obtained the quantity (being qualification rate) of the certified products in the middle of 30 that process respectively.The result is shown in table 1.In addition, Fig. 6 representes heat input quantity and the measurement result of resistance to heat of heat pipe of heat pipe and the comparative example 2 of embodiment.
(table 1)
Can carry out following evaluation according to the result shown in the table 1.At first, in platypelloid type heat pipe (embodiment) involved in the present invention,, keep the so-called straightening processing of linearity as anticipating, make resistance to heat become minimum, become 0.4 ℃/W through the core that the fine rule Shu Jinhang afterturn to the harness fine rule forms.In addition, the resistance to heat of the heat input quantity below the maximum heat input quantity is as shown in Figure 6, is stabilized in 0.4 ℃/W degree, therefore is considered to the excellent hot conveying characteristic of expression in the serviceability temperature scope.In addition, qualification rate is more than 90%, therefore is considered to the property made excellence.
Relative therewith, core not to be carried out in the comparative example 1 of The pre-heat treatment, the maximum heat input quantity is 10W, but resistance to heat is 0.8 ℃/W, increases to 2 times of embodiment.Certified products in the middle of other 30 have only 3, are considered to that qualification rate is low, the property made is poor.
In addition; Passing through the inner peripheral surface configuration of fine rule along container; And utilize helix tube that the fine rule crimping is fixed in the comparative example 2 that inner peripheral surface constitutes core, the maximum heat input quantity is 5W, is reduced to the half the of heat pipe involved in the present invention; Resistance to heat is 3.0 ℃/W in addition, increases to about 8 times of heat pipe involved in the present invention.
Then; Constitute in the comparative example 3 of core utilizing helix tube constraint fine rule, the maximum heat input quantity is 7W, and the resistance to heat under this situation is 1 ℃/W; Maximum heat input quantity and resistance to heat are better than the heat pipe of comparative example 2; But compare with thermal conducting tube phase involved in the present invention, it is more than 2 times that resistance to heat increases, and the maximum heat input quantity is merely 70% of embodiment.
Like this, heat pipe involved in the present invention, the maximum heat input quantity is represented two value, resistance to heat is represented the value below the decimal point in addition, therefore is considered to have excellent hot conveying capacity.In addition, the thickness attenuation is about 1mm, and therefore the lift-launch property to small electronic apparatus is excellent.And the deviation of goods is few, the property made is excellent.In addition, under the situation of the structure of the central portion that becomes the container that core is disposed at the hollow flat shape, in the time of can being processed into flat at extruded tube, prevent or the central portion that suppresses container produces exceedingly distortion such as depression.
In addition, in the structure of the above embodiments, process many and core is not sintered in the heat pipe of container, and make heat pipe flexural deformation, measured its resistance to heat for affirmation.After the harness fine rule; Though the formed core of afterturn is fixed in the resistance to heat of platypelloid type heat pipe of the foregoing description of container is stabilized in about 0.4～0.6 ℃/W through sintering; But not with the core sintering, be not fixed in the heat pipe of container; There is deviation in resistance to heat in the scope of 0.4～1.2 ℃/W, there is difficult point in the heat pipe that therefore is considered to make stability of characteristics.
At this, to the so-called core of twisting thread being formed linearity through The pre-heat treatment, and through spreading all over that its total length is sintered in container and fixing effect, effect describes.Sometimes be wound in coil owing to constitute the fine rule of core in its manufacturing and delivery phase, thus produce crooked residual stress sometimes, its result, and under the situation of harness as the fine rule bundle, perhaps after cargo handling process in generation bending sometimes.In the present invention, owing to utilize annealing to wait heat treatment to eliminate such residual stress, make fine rule Shu Chengwei linearity, so during being inserted into the inside of container, perhaps in this process, do not bend.Therefore shown in Fig. 7 (a), can make core 4 be configured in its inside along the shape of container 3.In addition, through carrying out sintering as stated, spread all over it and engage with container 3 endlong and fix.Therefore the container 3 that is built-in with core 4 is being carried out under the crooked situation, shown in Fig. 7 (b), core 4 also as one man is out of shape with the shape of container 3.Even if its result also can be guaranteed after bending along the vapor flow path 5 of core 4.
Relative therewith; Core 4 is not being implemented under the situation of The pre-heat treatment, on core 4, produced distortion owing to the residual stress of self, for example shown in Fig. 8 (a); The part of core 4 disposes with the mode of the inside of crosscut container 3; Its result, vapor flow path 5 cores 4 obturations flowing of fluid steam that hinder one's work, and hot conveying capacity worsens.Such state of affairs also produces under with the situation after the heat pipe bending, and Fig. 8 (b) representes this state.
On the other hand, under the situation of the inner surface that both ends of core 4 etc. is fixed in container 3, shown in Fig. 9 (a); Core 4 disposes with the mode that what is called tilts with respect to container 3; Its result, same with situation shown in Figure 8, the inside of core 4 crosscut containers 3 and make vapor flow path 5 speed changes.Such situation, shown in Fig. 9 (b), under with the situation after the heat pipe bending, the pars intermedia of core 4 contacts with the inner surface of container 3, and its result has hindered the hot conveying capacity of heat pipe.Particularly in the platypelloid type heat pipe; Because core contacts with the interior upper and lower surfaces of container; Therefore like Fig. 8, shown in Figure 9, the shape of core 4 is different with the shape of the inner surface of container 3, under core 4 and situation that the inner surface of container 3 contacts; Vapor flow path 5 is basically fully by obturation, and can not carry out the heat delivery between the both ends of container 3.
Claims (5)
1. platypelloid type heat pipe utilizes to be heated and to evaporate and dispel the heat and the working fluid of condensation comes transfer heat,
This platypelloid type heat pipe is characterised in that to possess:
Container, it is configured as flat and inclosure has above-mentioned working fluid;
Core, it is made up of the fine rule bundle, and the above-mentioned working fluid through liquid phase soaks into and produce capillary pressure, and wherein above-mentioned fine rule bundle is with many fine rule harnesses and to make these fine rules be that the center is twisted to close and formed with its central axis,
The above-mentioned core that constitutes by above-mentioned fine rule bundle, with the said vesse of flat in upper and lower surface or the state of flanked, and the total length setting that spreads all over the length direction of said vesse with the mode of not stopping up as the space of vapor flow path, in addition,
Part arbitrarily in the part that above-mentioned core and said vesse join, the total length of the length direction through spreading all over above-mentioned core is carried out sintering and is fixed.
2. platypelloid type heat pipe according to claim 1 is characterized in that,
Above-mentioned fine rule comprises copper cash.
3. platypelloid type heat pipe according to claim 1 and 2 is characterized in that,
Above-mentioned fine rule bundle is carried out The pre-heat treatment so that become linearity.
4. platypelloid type heat pipe according to claim 3 is characterized in that,
Above-mentioned The pre-heat treatment comprises annealing in process.
5. according to any described platypelloid type heat pipe in the claim 1 to 4, it is characterized in that,
Said vesse is configured in above-mentioned fine rule bundle to be extruded under the state of central portion of aforementioned tube and is being configured as flat.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009041329 | 2009-02-24 | ||
| JP2009-041329 | 2009-02-24 | ||
| PCT/JP2010/052696 WO2010098303A1 (en) | 2009-02-24 | 2010-02-23 | Flat heat pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102326046A true CN102326046A (en) | 2012-01-18 |
Family
ID=42665510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800088915A Pending CN102326046A (en) | 2009-02-24 | 2010-02-23 | Flat heat pipe |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110303392A1 (en) |
| JP (1) | JP5075273B2 (en) |
| CN (1) | CN102326046A (en) |
| WO (1) | WO2010098303A1 (en) |
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| CN104296570A (en) * | 2014-10-17 | 2015-01-21 | 中国石油大学(华东) | Heat pipe |
| CN105258543A (en) * | 2014-06-06 | 2016-01-20 | 奇鋐科技股份有限公司 | Crosswise-woven capillary structure and heat pipe structure with same |
| CN111788445A (en) * | 2018-03-12 | 2020-10-16 | 株式会社藤仓 | Flat heat pipe |
| CN114577046A (en) * | 2017-05-08 | 2022-06-03 | 开文热工科技公司 | Thermal management plane |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20110303392A1 (en) | 2011-12-15 |
| JPWO2010098303A1 (en) | 2012-08-30 |
| WO2010098303A1 (en) | 2010-09-02 |
| JP5075273B2 (en) | 2012-11-21 |
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Application publication date: 20120118 |