CN204757782U

CN204757782U - Fin and heat -sink device

Info

Publication number: CN204757782U
Application number: CN201520196609.0U
Authority: CN
Inventors: 关政; 孙家麟
Original assignee: ZHENJIANG TIANTONG ALUMINUM Co Ltd
Current assignee: Zhenjiang Tiantong new Mstar Technology Ltd
Priority date: 2015-04-02
Filing date: 2015-04-02
Publication date: 2015-11-11
Anticipated expiration: 2025-04-02

Abstract

The utility model provides a fin to rectangle aluminium foil or aluminum sheet are the base plate, and be folding in succession with the whole width of base plate, makes perpendicular folding trace cross -section be the strip of the same periodic waveform, and the strip width of wave form equals the width of board, and all folding traces are parallel circular arc curvilinear figure. Heat sink component is including two fin, two tie aluminum plate, one deck PTC pottery, wave crest face contact bondings such as first flat aluminum plate's first plane and first fin rectangle, the flat aluminum plate's of second the first plane and the square waveform face contact bonding of second fin are equipped with the material of brazing on the face of weld, centre gripping PTC potsherd between the flat aluminum plate's of first flat aluminum plate and second the second plane, PTC potsherd extraction electrode has the material of nai high temperature insulation in surperficial separating of electrode.

Description

A kind of fin and radiating element

One, technical field

The utility model relates to radiating element (heat exchange device) prepared by a kind of fin and fin.

Two, background technology

Radiating element (heat exchange device) prepared by existing fin and fin and fin, the most conventional with what reprocess after aluminum or aluminum alloy sheet or integral cast, purposes is extremely extensive: as the heater in domestic circuit, (the typical heater as PTC ceramic heat is the most conventional, heater comprises radiating element prepared by fin, PTC heating ceramic, radiating element and the large parts of fan three, existing radiating element is folded into continuous structure by aluminium flake exactly, its composition continuous print tip-angled shape, again by with aluminium sheet soldering, continuous print tip-angled shape made with aluminum foil will be folded into standby into strips), the aluminum fin-stock of air-conditioner, oil spit of fland, air conditioning for automobiles, the various heat exchanger such as electronic-device radiator, but the improvement on heat radiation blade base is extremely rarely seen.Fin and radiating element be that the heat dissipation capacity of unit mass is maximum to the peak demand of performance, certainly, the radiating element of PCT heater element carries out under needing the condition of strong convection.The heat shed under different air quantity condition is different.

201410499638 is the application of the applicant and a kind of fin, is base material with metal forming, and base material is carved with parallel and equally distributed groove, and this groove is real groove, the saturating groove of dotted line or full impregnated groove, and between groove, spacing is more than 0.5mm.Base material is carved with parallel and equally distributed groove again after concavo-convex roll-in system, and described concavo-convex roller is the roller of even convex parallel lines distribution, the parallel lines of roller be spaced apart 1-10mm; The parallel lines of concavo-convex roller are parallel with the saturating groove of dotted line or intersect.Unit materials has 2-6 times that surface area is the metal substrate of prior art.

The radiating element that under the condition of strong convection prepared by fin and fin needs more high efficiency design.The purposes of this strong convection radiating element is more and more wide.

Three, utility model content

The utility model object is, proposes a kind of modified node method radiating element and preparation of fin, makes the goods radiating element that under the condition of strong convection prepared by fin and fin have more high efficiency design.There is good rigidity and compact structure, and the efficiency of the radiating element of unit mass is higher.

The technical solution of the utility model is: a kind of fin, with rectangle aluminium foil or aluminium flake for substrate, fold continuously with the whole width of substrate, vertical folding trace cross section is made to be the bar of same period waveform, the bar width of waveform equals the width of plate, and all folding traces are parallel circular curve shape (comprising waveform etc.).

The shape (cross sectional shape) of described waveform is rectangle, triangle or U-shaped as well.

Wind along vertical folding trace cross section namely through circular curve shape air channel.

Aluminium foil or aluminium flake substrate surface are carved with parallel and equally distributed groove, and this groove is real groove, the saturating groove of dotted line or full impregnated groove, and the spacing between groove is more than 0.5mm.Spacing between certain groove is generally also no more than 10mm; Full impregnated groove refers to and all cuts through, and is the form of seam; The saturating groove of dotted line is dotted line shape seam.

The structure of heat sink assembly, adopt described fin, the wave crest of upper and lower (rectangle) waveform of fin all welds flat aluminium sheet (shown in Fig. 3), flat aluminium sheet more easily welds with square waveform face (generally adopting brazing mode), be prepared into the radiating element of strip, PCT potsherd is clamped between flat aluminium sheet and flat aluminium sheet, PCT potsherd extraction electrode, high-temperature insulation material is separated with at electrode surface, typical in mica sheet, polytetrafluoroethylene (PTFE), polyimides (more than 500 DEG C) film etc.; The width of the radiating element of strip is ventilative passage, equidirectional with the folding trace of fin square wave.

The preparation method of heat sink assembly of the present utility model, the component of heat sink assembly is as follows: comprise two fin, two flat aluminium sheets, one deck PTC pottery; The wave crest face contact welds such as the first plane of the first flat aluminium sheet and the first fin rectangle; First plane of the second flat aluminium sheet and the square waveform face contact weld of the second fin, solder side is provided with cored solder; Clamp PTC potsherd between second plane of the first flat aluminium sheet and the second flat aluminium sheet, PTC potsherd extraction electrode, is separated with high-temperature insulation material at electrode surface; The component of above-mentioned heat sink assembly is fixedly placed on vacuum or protective gas indoor, direct-electrifying heating PCT potsherd is to the melting temperature of cored solder.The flat surface of aluminum plate contacted with fin wave crest face, by spraying or rolling cored solder, is certainly selected the cored solder of suitable temperature melting, can be selected in the polytypic cored solder material of prior art.

Between two flat aluminium sheets, PTC potsherd can be following structure: PTC potsherd is placed in the aluminium sheet that cross section is U-shaped or rectangular groove structure, then between the second plane being held on the first flat aluminium sheet and the second flat aluminium sheet.

First flat aluminium sheet and the second flat aluminium sheet can be the cross sections be integrally connected is the component of U-shaped, and PCT potsherd is placed in U-lag.The utility model utilizes the same terms of vacuum brazing or protective gas soldering once to be processed successfully by assembly cleverly.

The operating temperature of about 500 DEG C selected by PCT potsherd, the success of heat sink assembly time processing, the course of work afterwards, PCT potsherd is in forced convertion state, its temperature can not reach about 500 DEG C, generally can not more than 300 DEG C, the width of the radiating element of strip is ventilative passage, and the folding trace of ventilative passage and fin square wave is equidirectional.

Described aluminium also comprises aluminium alloy, also comprises the aluminium alloy given by patent CN2009100135440.

The beneficial effects of the utility model are, when being prepared into the PCT heater of 1-2KW, under the condition of Aluminium Radiator part adopting equal in quality: the heat radiation power that prior art radiating element is measured is: 895W, 1172W, 1325W (corresponding basic, normal, high third gear wind speed); The heat radiation power that the utility model radiating element is measured is: 937W, 1220W, 1350W (corresponding basic, normal, high third gear wind speed); Visible in low wind speed conditions of forced convection under radiating efficiency high a lot, 7-8% can be reached, obtain beyond thought effect, long (being prepared into device should be that width dimensions the is more suitable) 1-2cm of fin strips, the width (as shown in Figure 2) of square wave gets 2-5mm.

The heat radiation blade base be processed into of the present utility model makes surface area greatly increase, two to three times of former base can be increased to, folded trace is parallel circular curve shape and parallel lines cut the function that groove has similar reinforcement, thinner aluminium foil is made to have the sheet strength of increase, comparatively speaking, material of the present utility model thinlyyer can carry out design and use, and the utility model base material can improve the efficiency of heat radiation greatly; The groove of sheet base, comprise the effect that the saturating groove of dotted line or full impregnated groove all have multidimensional ventilation and heat, the radiating efficiency of the device prepared is improved greatly.The utility model prepare method efficiency high, cost is low, one-shot forming assembly.

Four, accompanying drawing explanation

Fig. 1 is the utility model heat radiating fin structure schematic diagram;

The A-A cross-sectional schematic of Fig. 2 the utility model Fig. 1 fin, provides wave cross section shape;

Fig. 3 is the structure chart that the PTC of preparation is combined with radiating element.

Fig. 4 is the utility model trough of belt heat radiating fin structure schematic diagram.

Five, detailed description of the invention

As shown in the figure, aluminium base 1, the breathing space 1-2 cutting groove, folded rectangular popin face 1-1, flat aluminium sheet 2, cored solder 3, PCT pottery 4, contact conductor 5.

A kind of fin, with rectangle aluminium foil or aluminium flake for substrate, fold continuously with the whole width of substrate, vertical folding trace cross section is made to be that the cycle, (cycle was generally 2-5mm, but be not limited thereto) bar of identical rectangular (U-shaped or triangular wave) waveform, the bar width of square waveform fin equals the width of plate, and it is better that the width (as shown in Figure 2) of square waveform gets 2-5mm.All folding traces are parallel circular curve shape.The height of square waveform can be 5-15mm, even can reach 30mm.Distance between the minimum and the highest size of circular curve shape is generally 0.5-3mm.

Be prepared in the application of radiating element with above-mentioned fin, the bar of the corrugated fins such as rectangle is wide (can be prepared in cutting, be prepared into the size that device should be width) generally only have 1-3cm, the corrugated fin length such as rectangle are not limit, and can reach more than 10cm; Prior art is all straight air channels, and the utility model is circular curve shape or the curved air channel of waveform; Wind can not directly flow through, because of the air channel of fin and folding trace equidirectional, make heat exchanger effectiveness high.

Fin strips folds with wide plate, half-finished fin strips is long equal wide plate fold after length, fin strips is wide equals the wide of wide plate, when being prepared into the PCT heater of 1-2KW, fin strips wide (being prepared into device should be that width dimensions is more suitable) 1-3cm, more than length 10cm; By machine cuts.

Aluminium base has expansion after cutting groove; Groove can be impermeable groove, also can be the penetrating groove of dotted line or the saturating groove of all-pass.

Aluminium base adopts aluminium foil, and the aluminium foil (or the thickness of other metal forming can be lower slightly) of more than 0.1mm thickness or about 0.1mm alloy foil above have suitable intensity.Thick paper tinsel is through concavo-convex impression and still greatly can increase surface area after cutting groove.The folded rectangular cross section be folded into continuously by aluminium base is as shown in Figure 2 square waveform.

Spacing between groove is more than 0.5mm, considers practicality, with 0.8-3mm as well.

The utility model can adopt aluminum alloy materials: as adopted following alloy material as base material, material have good can suppression performance: material is CN2009100135440ALMGSI sheet alloy, board composition is by mass percentage: MG0.4 ~ 0.8%, SI1 ~ 1.5%, CU0.7 ~ 0.8%, MN0.3 ~ 0.4%, FE0.4 ~ 0.6%, ZR0.1 ~ 0.2%, all the other are AL.

Fig. 3 is the structure chart that the PTC of preparation is combined with radiating element.This is a kind of embodiment of the present utility model.

It is square waveform that aluminium flake prepared by the utility model is folded into the cross section be folded into continuously as shown in Figure 2, again by with aluminium sheet soldering, for the cross-ventilation better effects if of the aluminum fin-stock of electric heater, air-conditioner, You Ting, air conditioning for automobiles, electronic-device radiator, the radiator being prepared into this structure is more easily processed, because sheet base is thin, and folding line can be suppressed when suppressing.Make collapsed shape more regular.

The solder melt point used is called soldering (BRAZING) more than 450 DEG C, and method for welding has FB method: use muriatic solder flux (ZnCl2, LiCl2).So follow-up washing and cleaning operation is indispensable.NB method uses the solder flux (KAlF4) of fluoride.

Solder material on the clean aluminium sheet face of weld, also can carry out painting Jiao solder in the mode of rolling by spraying method.Make one deck solder to the thickness of more than 25 microns.

Cored solder is that core body alloy adds solder: typical in Al-Mn alloy (as AA3003, AA3102, AA3005, AA3105 etc.) and Al-Mg-Si alloy (as AA6063, AA6951 etc.).5000 series alloys also can be used for VB soldering, adopt solder flux soldering process.In a word, to the basic demand of solder in soldering: suitable fusing point, should be lower than the fusing point of mother metal.There is good wetability, fully can fill up joint gap.With the diffusion of mother metal, ensure to be formed between them firmly to combine.There is stable and uniform composition, the segregation phenomena as far as possible in minimizing brazing process and the loss etc. of Volatile Elements.Meet mechanical performance and the physicochemical property requirement of product.Fusing point lower than 450 DEG C be meltable solder, be commonly called as soft solder; Higher than 450 DEG C be infusibility solder, be commonly called as hard solder.All can use.

Claims

1. a fin, to it is characterized in that with rectangle aluminium foil or aluminium flake, for substrate, folding continuously with the whole width of substrate, make vertical folding trace cross section be the bar of same period waveform, the bar width of waveform equals the width of plate, and all folding traces are parallel circular curve shape.

2. the radiating element of fin formation according to claim 1, is characterized in that comprising two fin, two flat aluminium sheets, one deck PTC pottery; The wave crest face contact welds such as the first plane of the first flat aluminium sheet and the first fin rectangle; First plane of the second flat aluminium sheet and the square waveform face contact weld of the second fin, solder side is provided with cored solder; Clamp PTC potsherd between second plane of the first flat aluminium sheet and the second flat aluminium sheet, PTC potsherd extraction electrode, is separated with high-temperature insulation material at electrode surface.

3. the radiating element of fin formation according to claim 2, is characterized in that aluminium foil or aluminium flake substrate are carved with parallel and equally distributed groove.