CN202928418U

CN202928418U - Heat pipe

Info

Publication number: CN202928418U
Application number: CN 201220565879
Authority: CN
Inventors: 边树仁; 魏厚瑗
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-10-31
Filing date: 2012-10-31
Publication date: 2013-05-08
Anticipated expiration: 2022-10-31

Abstract

The utility model relates to a heat pipe which comprises a metal pipe, metal wires and working mediums, wherein the metal wires are packaged in the metal pipe, the working mediums are filled in the metal pipe, the metal wires accounts for 30-70% of size of the metal pipe before the metal wires are extruded, the metal wires are tightly arranged in the metal pipe after being extruded, and pores are formed among the inner wall of the metal pipe and the adjacent metal wires and the adjacent metal wires. The heat pipe is made of metal, the pore structures are formed by the metal wires, the metal wires are tightly arranged in the heat pipe by extrusion to form uniform compact pores, enough capillary force is provided, and heat transferring efficiency of the heat pipe is improved.

Description

A kind of heat pipe

Technical field

The utility model relates to a kind of heat pipe, belongs to the heat transfer technology field.

Background technology

Heat pipe is the very high passive heat transfer element of a kind of heat conductivility, generally by pipe, is arranged at the capillary wick in pipe, and the end cap composition that seals described pipe, and managing inside is negative pressure, is full of working media, is called for short working medium, working medium commonly used such as freon.Heat pipe utilizes Transformation Principle and capillarity, amount of heat is passed through its very little sectional area long-distance transmissions, and need not additionaling power.Specifically heat pipe absorbs heat at evaporation ends, Working fluid phase changing is gas, and be transferred to colling end, working medium is after colling end is condensed into liquid, the capillary force that provides by capillary structure is back to evaporation ends with worker quality liquid, thereby form the heat transfer microcirculation in heat pipe, the heat transfer property of capillary structure opposite heat tube plays a decisive role.Compare with the heat transfer technology of routine, adopting heat pipes for heat transfer efficient is high and energy-saving effect is remarkable, applicable to the occasion of various complexity.Be widely used in the cooling of electronic installation chip, the cooling and high power transistor of notebook computer CPU cooling etc., its application has expanded to each industrial circle.

Chinese patent literature CN202041110U discloses a kind of superconduction microcirculation flat-plate heat pipe of additional capillary wick, the material of heat pipe is the good aluminium of heat-conductive characteristic or copper, include the supporting construction of some aluminium or copper in the hollow housing of flat-plate heat pipe, the material that is vertically connected at flat-plate heat pipe is upper wall surface and the lower wall surface of aluminium or copper, run through flat-plate heat pipe inside, wherein supporting construction and flat-plate heat pipe structure are integrated to push and form, thereby make flat-plate heat pipe inside be divided into some through holes, be arranged side by side in described flat-plate heat pipe, according to the through hole width, be provided with two metal capillary wick in through hole, be preferably the multiply copper stranded conductor, a single wire diameter minute multiply establishment by 0.05-0.08mm is that the copper stranded conductor that an external diameter is about 1.0-1.5mm forms, and be marked with working medium in through hole, thereby sealed at both ends formation Integral flat-plate heat pipe.This technical scheme be in theory strand copper wire as the capillary structure of flat-plate heat pipe, strand copper wire can with through-hole wall, form capillary structure between per share copper cash and copper cash, thereby the capillary force of backflow well be provided for working medium.But in fact because its hole size is fixing, and copper cash is thinner, is difficult to reach the desired dense degree of capillarity when filling copper cash, greatly reduces like this capillary force to cause the heat exchange efficiency of heat pipe low; And the material that forms pore is copper, causes whole heat pipe manufacturing cost higher.In addition, the length of this flat-plate heat pipe is fixed, and can not cut arbitrarily according to the actual needs, uses inconvenient.

The utility model content

Technical problem to be solved in the utility model is to be difficult to reach the desired dense degree of capillarity by copper stranded conductor in prior art, greatly reduces the technical problem of the heat exchange efficiency of heat pipe; Thereby provide a kind of capillary wick to fill closely and the high heat pipe of heat exchange efficiency.

For solving the problems of the technologies described above, the utility model is achieved through the following technical solutions:

A kind of heat pipe is provided, comprises metal tube, be packaged in the wire in described metal tube, and be filled in the working medium in described metal tube, before extruding, described wire occupies the 30-70% of described metal tube volume; Described wire close-packed arrays in described metal tube after extruding is being formed with pore between the inwall of described metal tube and adjacent described wire and between adjacent described wire.

Also comprise the layer of surface protective layer that covers described heat pipe outer surface.

Described metal tube is pipe, and after extruding, described metal tube inner chamber becomes a flat inner chamber that is surrounded by the parallel compressive plane in two of up and down and the circular arc joint face between compressive plane.

Described diameter range wiry is between 0.1mm-0.5mm.

Described wire is Flexible wire; Described metal tube is flexible metal conduit.

Described Flexible wire is soft aluminium wire; Described flexible metal conduit is soft aluminum pipe.

Technique scheme of the present utility model has the following advantages compared to existing technology:

(1) in the utility model, pipe is metal tube, wick structure is also to be made of wire, make wire close-packed arrays in metal tube by extruding, forming the pore of even compact between wire and inner wall of metal tube and between adjacent wire, can guarantee the capillary force that provides enough, improve the heat exchange efficiency of heat pipe.

(2) by selecting flexible metal conduit and Flexible wire, can obtain by cutting sealing simultaneously the heat pipe of less long measure; Take full advantage of the soft characteristic in soft metal, can arbitrarily cut according to actual needs.

(3) outer surface of heat pipe described in the utility model forms sealer through oxidation processes, has improved the corrosion resistance of heat pipe, has effectively extended the service life of heat pipe.

(4) metal of the present utility model is selected soft aluminium, can realize cutting sealing, than copper metal of the prior art, can greatly reduce production costs.

Description of drawings

For content of the present utility model is more likely to be clearly understood, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein,

Fig. 1 is the soft aluminothermy pipe manufacturing method flow chart of an embodiment of the utility model;

Fig. 2 a is the filling working medium used in method shown in Figure 1 and the structural representation of encapsulating mould;

Fig. 2 b is the left diagram of Fig. 2 a;

Fig. 3 a is the end construction schematic diagram of the heat pipe of method manufacturing shown in Figure 1;

Fig. 3 b is the heat pipe phantom along its length in Fig. 3 a;

Fig. 4 is the red copper manufacturing method of thermotube flow chart of second embodiment of the utility model;

Fig. 5 a is the structural representation of the encapsulating mould that uses in Fig. 4;

Fig. 5 b is the left view of Fig. 5 a;

Fig. 6 a is the end construction schematic diagram after pre-packaged;

Fig. 6 b is the heat pipe phantom along its length in Fig. 6 a.

In figure, Reference numeral is expressed as: the 1-square chest, and the 2-encapsulant, the 3-patrix, the 31-patrix connects die shank, the 32-upper slitter, 320-the first sealing, the 4-counterdie, the 41-counterdie connects die shank, cutter under 42-, 420-the second sealing, the soft aluminothermy pipe of 451-, the pre-packaged patrix of 23-, 3200-the first groove, the pre-packaged patrix of 231-connects die shank, the pre-packaged upper slitter of 232-, the pre-packaged counterdie of 24-, the pre-packaged counterdie of 241-connects die shank, the pre-packaged lower cutter of 242-, 4200-the second groove, 61-red copper heat pipe, 7-die core.

The specific embodiment

Shown in Figure 1, the manufacture method as the soft aluminothermy pipe of an embodiment of the utility model in turn includes the following steps:

S11: soft aluminium wire is filled in soft aluminium pipe, and described soft aluminium wire occupies 30% of described soft aluminium pipe volume; In the present embodiment, described soft aluminium refers to that purity is greater than 99% fine aluminium; Wherein, the diameter of described soft aluminium wire is 0.1mm, and the interior diameter of described soft aluminum pipe is 100mm;

S12: push described soft aluminium pipe and reduce to described soft aluminium pipe internal volume, between the inwall of described soft aluminium pipe and adjacent described soft aluminium wire and form pore between adjacent soft aluminium wire; In the present embodiment by the extruding of rolling realization to described soft aluminium pipe; And obtain the long-pending soft aluminum pipe of predetermined content by the distance between control milling train up-down rollers, the fine and close arrangement in soft aluminium pipe of the soft aluminum metal silk after guaranteeing to push, and described wire is indeformable; Shown in Fig. 3 a-3b, after extruding, described soft aluminium pipe inner chamber becomes a flat inner chamber that is surrounded by the parallel compressive plane in two of up and down and the circular arc joint face between compressive plane;

S13: first with an end sealing of described soft aluminum pipe, and then fill working medium in the described soft aluminum pipe after the extruding in enclosure space, seal again the other end of described soft aluminum pipe at last, namely obtain soft aluminothermy pipe;

As the concrete encapsulating method of the present embodiment, realize by the pressure encapsulating mould, described encapsulating mould adopts steel alloy or extraordinary high-carbon steel manufacturing, be arranged on hydraulic press or punch press or friction press equal pressure process equipment, shown in Fig. 2 a-2b, described Encapsulation Moulds specifically comprises patrix 3 and counterdie 4, wherein, described patrix 3 comprises that further patrix connects die shank 31 and upper slitter 32, described patrix connection die shank 31 is connected with pressworking equipment and motion under it drives, and the top of described upper slitter 32 forms the first sealing 320 of dome arc; Described counterdie 4 comprises that counterdie connects die shank 41 and lower cutter 42, described counterdie connection die shank 41 is connected with pressworking equipment and motion under it drives, the top of described lower cutter 42 forms the second sealing 420 of concave arc, the arc radius of described the first sealing 320 and described the second sealing 420 equates, and described the first sealing 320 and described the second sealing 420 coordinate by the extruding heat pipe and then realize sealing; The encapsulating method of described soft aluminothermy pipe 51 1 ends is as follows: the soft aluminum pipe that inside is installed soft aluminium wire is completed encapsulation by pressurization in the middle of being placed on above-mentioned encapsulating mould; The sealing of described soft aluminothermy pipe 51 other ends need to be carried out in confined space, concrete grammar is as follows: at first, fill working medium, it is an enclosed construction that the space of filling working medium is set in the present embodiment, in the present embodiment, working medium is freon, and shown in Fig. 2 a-2b, the closed structure that is used for filling working medium in the present embodiment is square chest 1, the folding up and down of this square chest 1 is equipped with encapsulant 2 in the opening and closing place; Porosely above square chest 1 can make described patrix connect die shank 31 to penetrate, described patrix connects has encapsulant 2 to prevent that Working medium gas from leaking between die shank 31 and hole; The counterdie 4 corresponding with patrix 3 is arranged on the lower surface of square chest; Described soft aluminium pipe passed and be provided with equally encapsulant 2 at described soft aluminium pipe and lateral opening hole place at the lateral opening hole of described square chest 1, guaranteeing the sealing in square chest 1 interior space; Pass into working medium until reach the pressure of regulation to this square chest 1; Be full of working medium in pore in described aluminum pipe at this moment, then realize the sealing of the heat pipe other end by the cooperation of patrix 3 and counterdie 4 in square chest 1, obtain to be full of the heat pipe of working medium; Sealing also needs the interior freon of described square chest 1 of finding time before the taking-up heat pipe after completing, avoid revealing atmosphere pollution.

S14: the heat pipe outer surface after sealing is carried out anodic oxidation and water shut off treatment, to form the oxide-film as protective layer;

S15: obtain less long measure heat pipe by cutting and sealing simultaneously, concrete steps are as follows: preparation upper slitter and lower cutter, wherein, be similar to described upper slitter 32 and lower cutter 42, the dome arc is made on the top of described upper slitter, and concave arc is made on the top of lower cutter, and its arc radius is consistent with the dome arc radius of upper slitter, because the cambered surface radius of two cutting knifes in up and down is identical and concave-convex can only break workpiece by extruding, realize cutting and sealing simultaneously like this after two cutter contacts.

The present embodiment can be realized soft aluminium wire close-packed arrays in soft aluminum pipe by the method for extruding, forms the pore of even compact, can guarantee the capillary force that provides enough, improves the heat exchange efficiency of heat pipe; Use simultaneously soft aluminium can realize simultaneously cutting and the sealing of heat pipe, can arbitrarily cut as required.

As other embodiment of the present utility model; the order of described step S14 and step S15 can be changed; namely can first carry out cutting sealing to Great Wall Software's aluminothermy pipe; and then the outer surface of the short soft aluminothermy pipe after sealing is carried out anodic oxidation and water shut off treatment formation oxide-film; other is with above-mentioned embodiment; can realize the purpose of this utility model equally, belong to protection domain of the present utility model.

As other embodiment of the present utility model, filling working medium can be carried out in a large enclosure space, the square chest 1 that namely is equivalent in above-described embodiment amplifies, encapsulation and filling working medium all are arranged in this enclosure space with equipment, can realize the batch sealing of heat pipe, simultaneously, because there is not sealing problem between package module and seal cavity, be convenient to suitability for industrialized production.

As a distortion of above-described embodiment, described soft aluminium can be the higher fine aluminium of purity of the prior art and replaces, and is not limited to purity greater than 99% fine aluminium, as long as have corresponding softness, convenient sealing cutting gets final product.

Distortion as above-described embodiment; what after filling, soft aluminium wire occupied described soft aluminium pipe volume also can be arbitrary value between 30-70%; so both easily described soft aluminium wire was filled into described soft aluminium pipe; easy to operate; can guarantee that again the rear described soft aluminium wire of extruding is full of described soft aluminium pipe and forms a large amount of pores; can realize the purpose of this utility model equally, belong to protection domain of the present utility model.

Shown in Figure 4, the manufacture method as second embodiment red copper heat pipe of the present utility model specifically comprises the steps:

S21: copper wire is filled in copper tube, and described copper wire occupies 70% of described copper tube volume; Wherein, red copper is exactly copper simple substance, also is industrial pure copper, is rich in ductility and plasticity, and in the present embodiment, the diameter of copper wire is 0.3mm, and the interior diameter of described copper tube is 250mm; Distribute without copper wire near the copper tube inner end, be convenient to follow-up pre-packaged;

S22: push described pipe to described copper tube internal volume and reduce, forming pore between the inwall of described copper tube and between adjacent described copper wire and between adjacent copper wire; In the present embodiment by the extruding of rolling realization to described copper tube; And obtain the long-pending copper tube of predetermined content by the distance of controlling between the milling train up-down rollers; After extruding, described copper tube inner chamber becomes a flat inner chamber that is surrounded by the parallel compressive plane in two of up and down and the circular arc joint face between compressive plane, shown in Figure 4, during use, a described compressive plane can be used for being connected with heat abstractors such as fin, another described radiating surface can be used for being connected with thermal source, under the cooperation of heat pipe, dissipate fast the heat of thermal source;

S23: the described copper tube after the extruding is filled working medium and is carried out sealed at both endsly, obtains the red copper heat pipe, specifically comprises the steps:

S231: the described copper tube two ends after first adopting core and middle pressure encapsulating mould jaggy to push are carried out pre-packaged, obtain respectively foraminate pre-packaged of tool after pre-packaged at the two ends of described copper tube, the structure of encapsulating face is referring to shown in Fig. 6 a, and the structure of described core and middle pressure encapsulating mould jaggy is referring to shown in Fig. 5 a-5b; Described pre-packaged mould specifically comprises pre-packaged patrix 23 and pre-packaged counterdie 24, wherein, described pre-packaged patrix 23 comprises that further pre-packaged patrix connects die shank 231 and pre-packaged upper slitter 232, described pre-packaged patrix connection die shank 231 is connected with pressworking equipment and motion under it drives, and the top of described pre-packaged upper slitter 232 forms the first sealing; Described pre-packaged counterdie 24 comprises that pre-packaged counterdie connects die shank 241 and pre-packaged lower cutter 242, and described pre-packaged counterdie connection die shank 241 is connected with pressworking equipment and motion under it drives, and the top of described pre-packaged lower cutter 242 forms the second sealing; The middle corresponding position of described the first sealing and the second sealing all forms the first groove 3200 and the second groove 4200, when sealing described copper tube, first two die cores 7 are inserted from the two ends of described copper tube respectively, push rod pushes up copper wire, described pre-packaged upper slitter 232 and pre-packaged lower cutter 242 out movements, extruding forms middle two pre-packaged of leaving an aperture, after pre-packaged formation, described die core 7 is positioned at described the first groove 3200 and the second groove 4200, and the aperture in pre-packaged of simultaneously shutoff;

S232: by pulling out a die core 7 in described pre-packaged upper aperture, by this aperture, described copper tube is vacuumized, and this aperture is sealed after completing vacuumizing, the method and apparatus of encapsulation aperture all can use method for packing and the device in embodiment one, does not repeat them here;

S233: extract die core 7, utilize inflating nozzle, be filled with working medium by this aperture to described copper tube, and when reaching predetermined value, described copper tube internal pressure encapsulates described aperture, obtain red copper heat pipe 61, the method and apparatus of encapsulation aperture all can use method for packing and the device in embodiment one, does not repeat them here.

S24 carries out passivation to the outer surface of red copper heat pipe 61 after sealing, forms fine and close oxide film protection layer;

S25, obtain less long measure red copper heat pipe 61 by cutting and sealing simultaneously, concrete steps are as follows: preparation upper slitter and lower cutter, wherein, waveform is made along the length direction of described heat pipe in the top of upper slitter, and the corresponding waveform with the interlock of described upper slitter waveform is made on the top of lower cutter.And along the direction away from red copper heat pipe center, described upper slitter and described lower cutter get more and more tighter to interlock, can only workpiece be sealed by extruding after two cutter contacts like this, and then form a plurality of sealings in the end of red copper heat pipe, realize better sealing.

Fill working medium in the present embodiment and need to not carry out in airtight space, simple to operate; Can realize copper wire close-packed arrays in copper tube by the method for extruding, form the pore of even compact, guarantee to provide enough capillary forces, improve the heat exchange efficiency of heat pipe; Can realize simultaneously cutting and the sealing of heat pipe, as required arbitrarily cutting.But the red copper price is high, thereby it is too high to adopt red copper to do the heat pipe cost, and relative weight is large.

As other embodiment of the present utility model; the order of described step S24 and step S25 can be changed; namely can first carry out cutting sealing to long heat pipe; and then the tube outer surface of the short heat pipe after sealing is carried out oxidation processes formation oxide film protection sheath; other is with above-mentioned embodiment; can realize the purpose of this utility model equally, belong to protection domain of the present utility model.

As the distortion of second embodiment, pre-packagedly also can only carry out an end, namely first with an end sealing of described red copper metal tube; Then first carry out pre-packaged to the other end; formation is with pre-packaged of an aperture; the working medium that vacuumizes and fill is subsequently undertaken by the same aperture on same pre-packaged; last again to the carrying out of described red copper metal tube pre-packaged end seal and get final product; can realize the purpose of this utility model equally, belong to protection domain of the present utility model.

Manufacture method as the 3rd embodiment heat pipe of the present utility model specifically comprises the steps:

S31 is filled into copper wire in the copper coin pipe, and described copper wire occupies 30% of described copper coin pipe volume; In the present embodiment, described copper refers to hard copper, and so-called hard copper refers to the alloyed copper of copper nisiloy chromium, because alloyed copper itself possesses good corrosion resistance and oxidative resistance, therefore can save the step that sealer is obtained in post processing; The diameter of copper wire described in the present embodiment is 0.5mm, and the interior diameter of described copper coin pipe is 200mm;

S32 pushes described copper coin pipe and reduces to described copper coin pipe internal volume, between the inwall of described copper coin pipe and adjacent described copper wire and form pore between adjacent described copper wire; In the present embodiment by the extruding of rolling realization to described copper coin pipe; And obtain the long-pending copper pipe of predetermined content by the distance of controlling between the milling train up-down rollers; After extruding, described copper coin tube cavity becomes a flat inner chamber that is surrounded by the parallel compressive plane in two of up and down and the circular arc joint face between compressive plane;

S33, first the end with described copper coin pipe carries out welded seal, and then fills working medium in the described copper coin pipe after the extruding in enclosure space, and the last other end of the described copper coin pipe of welded seal more namely obtains the copper heat pipe; Method as the concrete filling working medium of the present embodiment: the space of filling working medium is an enclosed construction, for example can with embodiment one in soft aluminothermy pipe identical, be namely a square chest, this square chest can the up and down folding, in the opening and closing place, encapsulant is installed; Above square chest, the porose connection die shank of mold that can make penetrates, and has encapsulant to prevent that Working medium gas from leaking between die shank and hole; The counterdie corresponding with patrix is arranged on the lower surface of enclosure space; Described copper pipe is passed and copper pipe must be connected with this space by sealing with the mould vertical motion and perpendicular to perforate on mold plane rectangular plane; Pass into working medium until reach the pressure of regulation to this enclosure space;

In the present embodiment, copper used is hard copper, and inconvenience seals by the pressure encapsulating mould, and is inconvenient to realize arbitrarily cutting.

As other embodiment of the present utility model, on described upper slitter on the first sealing and lower cutter the concrete shape of the second sealing can set according to actual needs, as long as the cooperation by upper slitter and lower cutter can realize the sealing of heat pipe end; And can form as required substantially parallel multiple-sealed line in the end of heat pipe, and can guarantee better sealing effectiveness, can realize the purpose of this utility model equally, belong to protection domain of the present utility model.

In above-described embodiment, any one value between the optional 2mm-200mm of the interior diameter of described heat pipe also can be selected greatlyr according to actual needs, and the size of the bottom surface of main fin according to being connected with described heat pipe is determined; Form for guaranteeing pore, any one value between the optional 0.1-0.5mm of described diameter wiry because the molecular size of different working medium is different, so its Van der Waals force that needs is also different, need to the also difference slightly of size of pore.

Obviously, above-described embodiment is only for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among protection domain of the present utility model.

Claims

1. a heat pipe, comprise metal tube, is packaged in the wire in described metal tube, and be filled in the working medium in described metal tube, it is characterized in that: before extruding, described wire occupies the 30-70% of described metal tube volume; Described wire close-packed arrays in described metal tube after extruding is being formed with pore between the inwall of described metal tube and adjacent described wire and between adjacent described wire.

2. heat pipe according to claim 1, is characterized in that: also comprise the layer of surface protective layer that covers described heat pipe outer surface.

3. heat pipe according to claim 1 and 2, it is characterized in that: described metal tube is pipe, after extruding, described metal tube inner chamber becomes a flat inner chamber that is surrounded by the parallel compressive plane in two of up and down and the circular arc joint face between compressive plane.

4. heat pipe according to claim 3, it is characterized in that: described diameter range wiry is between 0.1mm-0.5mm.

5. according to claim 1 and 2 or 4 described heat pipes, it is characterized in that: described wire is Flexible wire; Described metal tube is flexible metal conduit.

6. heat pipe according to claim 5, it is characterized in that: described Flexible wire is soft aluminium wire; Described flexible metal conduit is soft aluminum pipe.