CN205897915U - Ultra -thin heat pipe is used in cell -phone heat dissipation - Google Patents

Abstract

The utility model discloses an ultra -thin heat pipe is used in cell -phone heat dissipation, this ultra -thin heat pipe include metal body, woven wire imbibition core and working medium, wherein metal body afterbody and head both ends seal, and the pipeline section of metal body becomes the platykurtic after technology is flattened in the phase transition, form the airtight inner chamber of ultra -thin heat pipe, woven wire imbibition core is formed by spiral woven wire or plane woven wire or both compound sintering, working medium generally is the liquid that latent heat of vaporization is high, the specific heat capacity is big. The utility model discloses inside woven wire structure, gas - liquid channel separation and unobstructed, whole thickness adapts to the inside narrow and small heat dissipation space of cell -phone completely, imbibition core capillary force is big, and working medium backward flow resistance is little, and heat transfer performance is good, the woven wire structure is inseparable, is difficult for scattering, and mechanical properties is good, easily buckles and flattens the shaping. The utility model discloses ultra -thin heat pipe is used in cell -phone heat dissipation, its simple process is stable, is fit for batch production, and is efficient, and the yields is high.

Description

A kind of mobile phone heat transmission ultrathin heat pipe

Technical field

This utility model belongs to conduction of heat technical field, is related to a kind of hot pipe technique, more particularly to a kind of mobile phone radiating Use ultrathin heat pipe.

Background technology

With the raising of mobile intelligent, integrated and lightening degree, the performance to its processor, such as data processing energy Power, communication network ability, high-definition shooting are higher as the requirement of disposal ability, high resolution output display etc., and power consumption also can Corresponding sharp increase, and the thickness of mobile phone is typically below 8 millimeters instantly；Due to thickness of thin, to device interior with cpu, photographic head Deng based on heater element radiating propose more harsh requirement.Radiate the serious heating problem of mobile phone being brought not in time, Greatly destroy the operation comfort of user, the work that the frequency reducing problem brought of simultaneously generating heat directly affects equipment is smooth Degree, and mobile phone works long hours at relatively high temperatures, and the endurance of equipment can decline to a great extent, the property of its internal electronic element Also can drastically can decline with the life-span.

Heat pipe is a kind of phase-change heat transfer element, has higher heat conductivity and heat power, and its heat conductivity is existing Tens times of metal material arrive hundred times, but conventional heat pipe is all difficult in adapt to narrow space in mobile phone from diameter to thickness, and Tradition also meets with bottleneck using the mobile phone heat dissipation technology of graphite film and heat-conducting glue, therefore it is ultra-thin towards mobile phone radiating to be badly in need of design Heat pipe.

Mobile phone heat transmission ultrathin heat pipe thickness requirement is very thin, its thickness much in 0.30-0.60 millimeter, and in it Portion also needs to arrange the gas-liquid channel being separated from each other, to ensure gas-liquid cycle efficient heat transfer during work.Ultrathin heat pipe is used when making Tube wall thickness be generally 0.05-0.10 millimeter, easily deform in manufacturing process, ultrathin heat pipe molding simultaneously often also need to through Bending and flattening.

In prior art, ultrathin heat pipe wick is generally copper powder sintered type, needs into thin metallic tubd in its manufacture process Insert metal dust, it is very difficult to fill out powder operating process, concordance it is difficult to ensure that, simultaneously thickness also can critical constraints, can only make Make the ultrathin heat pipe that thickness is 0.8-1.5 millimeter, and when ultrathin heat pipe is made using traditional handicraft, fold easily occurs and collapses Fall into, manufacture difficulty is very big, inefficiency, and yields is low.

Chinese patent (application for a patent for invention number: 201310743998.x) discloses one kind and " has the ultra-thin heat of fibre bundle The coaxial braiding capillary structure of pipe and its ultrathin heat pipe ", the liquid sucting core structure of this ultrathin heat pipe is the hair of the coaxial braiding of fibre bundle Fine texture, its capillary structure is divided into main transmission capillary portion and coaxial braiding capillary portion, and main transmission capillary portion is by some fibre bundles Tie up composition, if coaxially braiding capillary portion is interweaved by carried interest and the silk thread in winding main transmission capillary portion forms, if per share comprise Dry root.The capillary wick structure of this patent application is excessively complicated, manufacture difficult it is difficult to volume production, and its capillary structure diameter Too big, the ultra-thin tube thickness of making is too thick to radiate it is impossible to be used for mobile phone.

As can be seen here, mobile phone heat transmission ultrathin heat pipe, either in structure design or manufacturing process, is required for again Design or improvement.

Content of the invention

The purpose of this utility model is for the problems referred to above, provides a kind of reasonable in design, the handss of excellent heat transfer properties Machine heat transmission ultrathin heat pipe, the internal wick of ultrathin heat pipe adopts screen net structure, and gas-liquid channel separates and unobstructed, heat transfer property Good, capillary force is big, and working media backflow resistance is little it is adaptable to mobile phone radiates；Its manufacturing approach craft simple and stable, is suitable for batch Produce, efficiency high, can be prevented effectively from make ultrathin heat pipe during various modifications and defect；Solve prior art appearance The problems referred to above.

This utility model be employed technical scheme comprise that, a kind of mobile phone heat transmission ultrathin heat pipe, comprising: metal tube, Metal gauze and working media,

Described metal tube wall thickness is 0.05-0.10 millimeter, its afterbody and head two ends welded seal, metal tube Pipeline section flattens through phase transformation and becomes flat after technique, forms the sealed internal chamber of ultrathin heat pipe；

Described metal gauze, is loaded on the sealed internal chamber of metal tube, is bonded in metal tube inwall shape through high temperature sintering Become the wick of ultrathin heat pipe；

Described working media is filled in the sealed internal chamber of metal tube, and working media is that the latent heat of vaporization is big, specific heat capacity is high Fluent material.

A kind of mobile phone heat transmission ultrathin heat pipe described in the utility model, is further characterized in that,

The wick of described metal gauze is single structure, or is composite construction；

The single structure of described metal gauze wick, is formed by the spiral silk screen sintering with three dimensional structure, described spiral shell Rotation silk screen is obtained through special equipment rotation braiding with the solid silk thread of metal tube material identical by tens to up to a hundred, silk thread Overall helically hollow ring, is interweaved between silk thread and silk thread, staggered helical alignment, and spiral silk screen is drawn into flat and burns Knot, after sintering, its bottom surface is bonded in metal tube inwall and forms single capillary wick structure；

The single structure of described metal gauze wick, or formed by the flat screen sintering with two-dimensional structure, described By some, solid silk thread is obtained flat screen through special equipment plane orthogonal weave with metal tube material identical, silk thread with Silk thread is in " well " font criss-cross arrangement, and after flat screen sintering, bottom surface is bonded in metal tube inwall and forms single capillary suction Wick-containing structure；

The composite construction of described metal gauze wick, has two by the described spiral silk screen with three dimensional structure with described The flat screen stacked on top of one another laminating sintering of dimension structure, sintering rear screw silk screen is mutually bondd with flat screen upper and lower surface, and The silk screen bottom surface being in lower floor is bonded in metal tube inwall, forms the capillary wick of composite construction.

Described mobile phone heat transmission ultrathin heat pipe integral thickness is 0.30-0.60 millimeter, described metal tube inner wire net Wick integral thickness be 0.10-0.50 millimeter.

This utility model mobile phone heat transmission ultrathin heat pipe, the metal gauze wick within metal tube be spiral silk screen, Flat screen or the composite wire structure of spiral silk screen peace face silk screen, gas-liquid channel separates and unobstructed, good heat-transfer, is suitable for In mobile phone radiating.The liquid sucting core structure of spiral screen net structure closely, is difficult to scatter, process is simple；Capillary force is big, and working media returns Flow resistance power is little；The heat transfer property that ultrathin heat pipe is obtained using metal gauze wick is stable, mechanical property good it is easy to bending, press Flat molding；Metal gauze wick using spiral silk screen peace face silk screen composite construction not only has spiral screen net structure imbibition The advantage of core, and the heat power using its prepared ultrathin heat pipe can be some higher.

Brief description

Fig. 1 a, Fig. 1 b are this utility model mobile phone heat transmission Ultrathin heat pipe structure schematic diagrams；

Fig. 2 a, Fig. 2 b are this utility model metal gauze spiral silk screen wick schematic configuration diagram；

Fig. 2 c, Fig. 2 d are this utility model metal gauze flat screen wick schematic configuration diagram；

Fig. 2 e is this utility model metal gauze composite construction liquid sucting core structure schematic diagram；

Fig. 3 a, Fig. 3 b are the center bar structural representations that this utility model wears silk screen use；

Fig. 4 is the manufacturing approach craft step schematic diagram of this utility model mobile phone heat transmission ultrathin heat pipe；

Fig. 5 a, Fig. 5 b are that this utility model wears silk-screen process step schematic diagram；

Fig. 6 is this utility model manufacture method metal tube associated process steps position location schematic diagram；

Fig. 7 is this utility model mobile phone heat transmission ultrathin heat pipe structural representation after bending technique；

Fig. 8 is this utility model mobile phone heat transmission ultrathin heat pipe through flattening structural representation after technique.

Specific embodiment

With reference to the accompanying drawings and detailed description this utility model is described in detail.

A kind of mobile phone heat transmission ultrathin heat pipe, as illustrated in figs. ia and ib, comprising: metal tube 1, metal gauze 2 He Working media；Metal tube 1 wall thickness is 0.05-0.10 millimeter, its afterbody and head two ends welded seal, the pipe of metal tube 1 Section is flattened through phase transformation and is become flat after technique, forms the sealed internal chamber of ultrathin heat pipe；Metal gauze 2, is loaded on the close of metal tube 1 Close inner chamber, be bonded in, through high temperature sintering, the wick that metal tube 1 inwall forms ultrathin heat pipe；Working media is filled in metal The sealed internal chamber of body 1, working media is that the latent heat of vaporization is big, the high fluent material of specific heat capacity.

The wick of this utility model metal gauze 2 is single structure, or is composite construction；Wherein, described metal gauze 2 The single structure of wick is sintered by the spiral silk screen 21 with three dimensional structure and forms, as shown in Fig. 2 a, Fig. 2 b, spiral silk screen 21 It is obtained through special equipment rotation braiding with the solid silk thread of metal tube 1 material identical by tens to up to a hundred, silk thread is overall Helically hollow ring, is interweaved between silk thread and silk thread, staggered helical alignment, and spiral silk screen is drawn into flat sintering, After sintering, its bottom surface is bonded in metal tube 1 inwall and forms single capillary wick structure.

Another kind of single structure of metal gauze 2 wick, as shown in Fig. 2 c, Fig. 2 d, by the plane with two-dimensional structure Silk screen 22 sintering forms, and flat screen 22 is by some and the solid silk thread of metal tube 1 material identical through special equipment plane Orthogonal weave is obtained, and silk thread and silk thread are in " well " font criss-cross arrangement, and after flat screen sintering, bottom surface is bonded in metal tube Body 1 inwall forms single capillary wick structure.

The composite construction of metal gauze 2 wick, as shown in Figure 2 e, by having the spiral silk screen 21 of three dimensional structure and have The flat screen 22 stacked on top of one another laminating sintering of two-dimensional structure, sintering rear screw silk screen 21 is mutual with flat screen 22 upper and lower surface Bond, and be in the silk screen bottom surface of lower floor and be bonded in metal tube 1 inwall, form the capillary wick 23 of composite construction.

Ultrathin heat pipe provided by the utility model, main inclusion metal tube 1, metal gauze 2 wick, work are situated between Matter.Wherein metal tube 1 constitutes the sealed internal chamber of ultrathin heat pipe；Metal gauze 2 wick can be by spiral silk screen 21, or plane silk Net 22, or both are complex sintered forms；Main Function is to provide working media vaporization split site, promotes the work after liquefaction to be situated between Matter flows back；Working media is generally liquid (under room temperature), the medium that preferably latent heat of vaporization is big, specific heat capacity is high, such as pure water, ethanol with Mixed solvent of the mixed solvent of pure water, acetone and pure water etc..

As shown in Figure 3 a, 3 b, the center bar 3 that this utility model is used for for metal gauze 2 penetrating metal tube 1 is a list The circle of side chamfered edge is directly excellent, insertion end end machining one " c " the type draw-in groove 31 of center bar 3, and inclined-plane chamfered edge simultaneously, to facilitate use " c " Type draw-in groove blocks metal gauze, is fed in metal tube 1.

The method manufacturing this utility model mobile phone heat transmission ultrathin heat pipe, as shown in figure 4, this manufacture method includes following work Skill step: center bar cleaning, center bar drying, the drying of center bar heat treatment, silk screen fixed length, screen bath, silk screen, base Guan Ding Length, the cleaning of the afterbody draw, base pipe, the drying of base pipe, afterbody weld, wear silk screen, sintering, mark, pull out center bar, annealing, fluid injection, take out Vacuum, two remove fixed length (abbreviation of secondary degasification and fixed length process), aligning, head welding, bending, flattening, detection, at finished product Reason.

Manufacturing the concrete manufacturing technology steps of this utility model mobile phone heat transmission ultrathin heat pipe is:

Step (1): center bar cleaning: the length of center bar 3 is determined according to the length of required finished product heat pipe, center bar 3 Contour structures as shown in Figure 3 a and Figure 3 b shows, this structure primarily to guarantee the metal gauze 2 penetrating reach sintered location it is ensured that Spiral silk screen 21, flat screen 22 or both be laminated the sintering quality of composite wire；Aligning arbor 3 is carried out, mainly Oil removal treatment, it is preferred to use the cleaning device with ultrasonic wave energy, the preferably hot de- agent of cleaning reagent.

Step (2): center bar is dried: the center bar 3 that cleaning is finished carries out drying and processing.

Step (3): center bar heat treatment: the center bar 3 after drying is put into reducing atmosphere sintering furnace and carries out at high warm Reason, primarily to improve the durability of center bar.

Step (4): silk screen fixed length: the length of metal gauze 2 is determined according to the length of required finished product ultrathin heat pipe, and according to This length cuts metal gauze 2.

Step (5): screen bath: the metal gauze cutting 2 is carried out oil removal treatment.

Step (6): silk screen is dried: the metal gauze 2 that cleaning is finished carries out drying and processing.

Step (7): base pipe fixed length: determine the length of metal tube 1 according to the length of required finished product ultrathin heat pipe, cut gold Belong to body 1.

Step (8): the afterbody draw: metal tube 1 afterbody after cutting carries out necking process, and afterbody necking is mainly The follow-up welding of convenience is it is ensured that form the weld seam of sealed reliable.

Step (9): base pipe cleaning: the metal tube 1 after the afterbody draw is processed is carried out processing, at oil removing Reason, removal surface oxide layer process etc..

Step (10): base pipe is dried: the metal tube 1 that cleaning is finished carries out drying and processing.

Step (11): afterbody welding: soldering is carried out to the afterbody necking position of metal tube 1, forms the weldering of sealing Seam, it is preferred to use tig welds.

Step (12): wear silk screen: penetrate metal gauze 2 through step using the center bar 3 after step (3) heat treatment Suddenly metal tube 1 inside of (11) afterbody welding is it is ensured that metal gauze 2 is in close contact with metal tube 1 inwall.

As shown in Fig. 5 a, Fig. 5 b, when wearing silk screen, first metal gauze 2 is stretched, by a bit of 90-degree bent of its head, then Metal gauze 2 bending part is snapped in " c " type draw-in groove 31 of center bar 3 and is hooked, then by metal gauze 2 one side closely It is fitted in the chamfered edge plane of center bar 3, simultaneously slowly using center bar 3, metal gauze 2 is pushed in metal tube 1, until Till center bar 3 cannot push." c " type draw-in groove of center bar 3 head design has been the effect of fixing metal gauze 2, anti-thrust Enter metal gauze 2 and the dislocation of center bar 3 chamfered edge plane slide anteroposterior during center bar；The effect of its chamfered edge plane is to send gold During belonging to silk screen 2, compression metal gauze 2, it is ensured that metal gauze is fitted with metal tube 1 inner tight, improves metal gauze Sintered bond intensity.

Step (13): sintering: the metal tube 1 of metal gauze 2 will be put in step (12) together with the insertion of its inside Axle 3 is put into together and is carried out high temperature sintering process in reducing atmosphere sintering furnace, makes metal gauze be bonded in gold by high temperature sintering Belong to inboard wall of tube body and form ultrathin heat pipe wick.

Step (14): mark: mark process is carried out to the metal tube 1 after step (13), that is, on metal tube 1 That side of sintered metal mesh 2 makes marks process, specifically using marking device in metal tube 1 sintered metal mesh imbibition The specific part of the side of core is stamped and is flattened labelling, as shown in Fig. 5 a, Fig. 5 b and Fig. 6, as metal tube 1 sintering metal silk The labelling in net wick face, this is marked at during follow-up flattening as ultrathin heat pipe positioning datum, when can avoid flattening metal tube 1 The phenomenon deviateing ultrathin heat pipe pipe shaft center in its interior metal silk screen wick.

Step (15): pull out center bar: extract inside metal tube 1 after processing through mark for the center bar 3.

Step (16): annealing: the metal tube 1 extracting center bar 3 is put into carry out in reducing atmosphere sintering furnace annealing treatment Reason, makes metal tube 1 inwall and metal gauze wick fully reduce.

Step (17): fluid injection: the metal tube 1 after annealing is carried out filling working media operation, that is, to metal tube Body 1 internal perfusion working media, the quality of working media mainly by the porosity of metal wicks, the length of finished product heat pipe and The working environment of heat pipe determines.

Step (18): evacuation: by perfusion working media metal tube 1 manage in carry out evacuation process, and using envelope Mouth mould extrudes at the mouth of pipe of cold welding sealing metal body 1；It is to realize managing to carry out evacuation inside metal tube 1 processing Inside higher vacuum, the boiling temperature reducing working media is it is ensured that under relatively low operating temperature, working media is in inside heat pipe energy Rapid vaporization, work of normally being conducted heat.

Step (19): two remove fixed length: the metal tube 1 processing through step (18) evacuation is carried out secondary degasification and determines The long incoagulable gas processing, removing the internal remaining of metal tube 1 preferably by ebuillition of heated exhaust means, improves gold further Belong to the vacuum in body 1, and extrude the two of cold welding sealing metal body 1 using sealing die and remove fixed length sealing part, as Fig. 6 institute Show, the distance at this position to afterbody weld is shorter than the distance of the sealing part of formation after evacuation to afterbody weld, Ran Houli With cut-out mould by this two pipe body part cut-out removing more than fixed length sealing part, and will accumulate in this metal tube 1 position and be subject to The incoagulable gas that heat rises is removed in the lump.

Step (20): aligning: by step (19) two remove fixed length after metal tube 1 carry out straightening processing it is ensured that subsequently gold Belong to reliability and the outward appearance concordance of body 1 head welding position.

Step (21): head welding: the head that metal tube 1 two after aligning is removed fixed length cold welding closure part is welded Process, form reliably spherical weld seam and, it is ensured that metal tube 1 head seal is reliable, no reveal, head welding preferably employs tig Welding.

Step (22): bending: for non-rectilinear ultrathin heat pipe, using Bending Mould by the metal tube 1 in step (21) Carry out bending forming；Described bending technique is carried out on hydraulic press, rushes the mode of curved circle directly-heated pipe using mould Carry out the molding of heat pipe bent angle, Forging Process heat pipe pipe shaft can be prevented effectively from and occur subsiding it is ensured that bent angle position transition circle is slided, no Fold.Heat pipe after bending and molding is as shown in Figure 7.

Step (23): flatten: using flattening mould to the heat pipe after bending, according to flattening labelling given side, carry out Metal tube 1 flattens molding, reaches requirement thickness.Before flattening, circular heat pipe is carried out with the baking of uniform temperature, during flattening Flatten upper/lower die and heat pipe is in pre- Warm status all the time, intraductal working medium is saturated-vapor state, and inboard wall of tube body bears outside Saturated vapour pressure, this pressure is played a supporting role it is ensured that ultrathin heat pipe body smooths after flattening in flattening process, is no recessed；As Shown in Fig. 8, for flattening the mobile phone heat transmission ultrathin heat pipe after molding.

Step (24): detection: the ultrathin heat pipe flattening after molding is detected, including product appearance detection, size inspection Survey and heat transfer property test, reject bad products.

Step (25): product handling system: to detecting that qualified ultrathin heat pipe product carries out product handling system, include cleaning, polish, Surface passivation etc..

Above-mentioned embodiment is an example of the present utility model, is not intended to limit of the present utility model enforcement and power Sharp scope, equivalence changes and modification that the content described in all foundation this utility model patent protection scopes is made, all should wrap Include in this utility model claim.

Claims (3)

1. a kind of mobile phone heat transmission ultrathin heat pipe, comprising: metal tube (1), metal gauze (2) and working media, its feature It is,

Described metal tube (1) wall thickness is 0.05-0.10 millimeter, its afterbody and head two ends welded seal, metal tube (1) Pipeline section through phase transformation flatten technique after become flat, formed ultrathin heat pipe sealed internal chamber；

Described metal gauze (2), is loaded on the sealed internal chamber of metal tube (1), is bonded in metal tube (1) through high temperature sintering Wall forms the wick of ultrathin heat pipe；

Described working media is filled in the sealed internal chamber of metal tube (1), and working media is the liquid that the latent heat of vaporization is big, specific heat capacity is high Body material.

2. a kind of mobile phone heat transmission ultrathin heat pipe according to claim 1 is it is characterised in that described metal gauze (2) Wick is single structure, or is composite construction；

The single structure of described metal gauze (2) wick is sintered by the spiral silk screen (21) with three dimensional structure and forms, described Spiral silk screen (21) rotates braiding with the solid silk thread of metal tube (1) material identical through special equipment by tens to up to a hundred It is obtained, the overall helically hollow ring of silk thread, be interweaved between silk thread and silk thread, staggered helical alignment, spiral silk screen stretches Become flat sintering, after sintering, its bottom surface is bonded in metal tube (1) inwall and forms single capillary wick structure；

The single structure of described metal gauze (2) wick or by have two-dimensional structure flat screen (22) sinter form, institute State flat screen (22) by some and the solid silk thread of metal tube (1) material identical through special equipment plane orthogonal weave system , silk thread and silk thread are in " well " font criss-cross arrangement, and after flat screen sintering, bottom surface is bonded in metal tube (1) inwall shape Become single capillary wick structure；

The composite construction of described metal gauze (2) wick, by the described spiral silk screen (21) with three dimensional structure and described tool Flat screen (22) stacked on top of one another having two-dimensional structure is fitted and is sintered, and sintering rear screw silk screen (21) is with flat screen (22) up and down Surface mutually bonds, and is in the silk screen bottom surface of lower floor and is bonded in metal tube (1) inwall, forms the capillary wick of composite construction Core (23).

3. a kind of mobile phone heat transmission ultrathin heat pipe according to claim 1 is it is characterised in that described mobile phone heat transmission is ultra-thin Heat pipe integral thickness is 0.30-0.60 millimeter, and the wick integral thickness of described metal tube (1) inner wire net (2) is 0.10-0.50 millimeter.