CN101194140A

CN101194140A - Metallic heat exchanger and method for manufacturing the same

Info

Publication number: CN101194140A
Application number: CNA2006800207763A
Authority: CN
Inventors: 赫尔马特·罗尔
Original assignee: Modine Manufacturing Co
Current assignee: Modine Manufacturing Co
Priority date: 2005-06-11
Filing date: 2006-02-18
Publication date: 2008-06-04
Also published as: EP1731864A1

Abstract

The invention relates to a fully-metal heat exchanger comprising flat tubes (1), which have two narrow sides and two wide sides (2, 3), and comprising fins (4) which form a block together with the flat tubes, and comprising either at least one tube plate (5) and one collecting tank (6), with edges (10) of the collecting tank (6) being connected, for example soldered, to edges (20) of the tube plate (5), or at least one collecting tank (6) which contains the tube plate, and having projections (11) which are arranged at intervals. The invention leads to a heat exchanger which has a small installation space requirement while having comparatively good thermal properties in that, according to the invention, the projections (11) engage in the ends of the flat tubes (1) in the region of the narrow sides (2). The production method according to the invention accordingly provides that the projections (11) are inserted into the ends of the flat tubes (1) approximately in the region of the narrow sides (2).

Description

Metallic heat exchanger and manufacture method thereof

Technical field

The present invention relates to a kind of metallic heat exchanger, be made of flat tube and fin with two narrow limits and two broadsides, they constitute one group with flat tube together, itself or have at least one the pipe end and collecting box, wherein the edge of collecting box links to each other with the edge at the pipe end, for example by welding; Perhaps have at least one collecting box, it comprises the pipe end, and has the projection that is provided with at interval.In addition, the invention still further relates to a kind of manufacture method of heat exchanger.

Background technology

Previously described heat exchanger is for example known by DE 198 19 247 A1.Projection is consistent in this aperture with the pipe end.Therefore, before implementing welding procedure, part can temporary winding together.The expense that is used for auxiliary welding equipment can obviously reduce.The shortcoming of known heat exchanger is that closing in fin-flat pipe group always exists tangible pipe baselap height, and this can be regarded as unnecessary space waste.In addition, the cross section that extracts from flat tube is not the best with respect to the ratio of the heat exchanger or the entire cross section at the pipe end, therefore also has the possibility of improving aspect the usefulness of heat exchanger.

Summary of the invention

The object of the present invention is to provide a kind of heat exchanger, it is under the situation that keeps relative heat technique value preferably, and requisite space still less.

Adjection is, can take easy to manufacture, design flexible especially.

Aspect metallic heat exchanger, solution according to the present invention is to require 1 feature to obtain by application rights.Manufacturing method according to the invention is the content of claim 22.Its regulation, the projection in the scope of narrow limit is inserted in the end of flat tube.This projection is preferably placed on the opposed longitudinal edge of collecting box.

In this case, embodiment preferably can be provided with like this, and promptly projection is arranged on the pipe longitudinal edge at the end, but possible shortcoming is that pipe end expense is very high, and does not have other advantage.Another kind of possible make is, accessory metal, frame-type is set, and it has projection.

Manufacture method can realize a series of advantage.When carrying out the welding procedure of back under load, on two opposed edges of collecting box, the projection that is inserted in the flat tube end is fixed flat tube, therefore can avoid flat tube so-called " collapsing " danger substantially, and its reason is and inadequate being welded to connect in the pipe end.Therefore the present invention allows to use such flat tube, and its broadside can have bigger size, thereby on the depth direction of flat tube-fin combination, avoids using a plurality of flat tubes wasteful on the manufacturing technology.In other words, by the present invention, in wideer efficiency range, can provide update cost heat exchanger still less.

Kept the advantage in the above-mentioned prior art level in addition, that is to say, reduced the expense that is used for auxiliary welding equipment especially significantly, because the projection of inserting helps the winding of heat exchanger part.

Because flat tube extends on the pipe entire depth at the end, preferred even projection exceeds, and does not therefore almost have cavity to occur, and the purpose of this cavity heat exchanging device is inoperative.In other words, the flat tube cross section of air-flow process and whole flat tube area are in favourable ratio, and it is also roughly the same with the whole relevant surfaces of heat exchanger.

In addition, from DE 195 43 9861 A1 or known to from document more early, do not manage the heat exchanger at the end compared with those as for example, what replace the pipe end is the flat tube end of expansion, and the heat exchanger that is proposed has higher processing procedure stability when producing.

Flat tube or exceed pipe wide of the end with its narrow limit, and in the scope that exceeds, projection is coupled in the end of flat tube.Perhaps, pipe bottom width face exceeds the narrow limit of flat tube, and in the scope that exceeds, projection is coupled in the end of flat tube.

As mentioned above, at first the replacement scheme of Ti Chuing is preferred, because the flat tube that can avoid better having mentioned " collapses ", because in this case, the edge of collecting box is close on the pipe edge at the end from the outside with its projection, this projection is on broadside, at the pressure that works on vertically perpendicular to flat tube, is resistive especially just.In addition, aspect creation connection more closely, this solution also is more favourable.

Projection touches the narrow limit of flat tube respectively internally, and preferably welding mutually herein.

The pipe end, preferably have rolled-up edge and aperture in known manner, is used for holding the flat tube end.But by suggestion, the aperture extends in the rolled-up edge always.

The pipe end, only have rolled-up edge on two longitudinal edges, so they can be made by the sheet material of random length.Therefore, the cost of die cost and change heat exchanger different size also can obviously reduce.

Collecting box has the end face aperture.Therefore each collecting box all only is meant the sheet material with two crimpings, and this also is favourable aspect manufacturing technology.

The end face aperture of collecting box is by known side cover plate sealing, and its length surpasses the length of flat tube.

Projection to be to meet the mode moulding of purpose, helps its insert action in the flat tube end.A kind of favourable improvement regulation, the shape that projection is pressed cutting teeth constitutes.This structure allows vertical tolerance of balance flat tube better.Although inevitably vertical tolerance is arranged, still can realize the tight connection between projection and the flat tube end.

Metallic heat exchanger can be had a mind to free burial grounds for the destitute and realizes a lot of local, keeps at the same time under the situation of good heat exchanger efficiency, and required space still less.The inventor considers that also this heat exchanger is specially adapted to the charger-air cooler of the cooling air in automobile.But the application possibility of also not getting rid of other is particularly at automotive field.

Metallic heat exchanger is meant such heat exchanger, and its part of mentioning in the claims all is made of metal, preferred aluminium, and whether no matter have nonmetallic member to be fixed on the heat exchanger subsequently, it also belongs to this system.For example in metallic heat exchanger, it should be made by the sheet material of distortion, also can load onto and the fixing annex of relative complex.

Be positioned at the projection of flat tube end, be positioned at and constitute on the wavy accessory, for example sheet material or similar object, it links to each other with the wallboard of collecting box, under load, in welding process subsequently, flat tube is fixed, therefore the above-mentioned flat tube danger of " collapsing ", its reason is inadequate being welded to connect of holding on the aperture, also can avoid by this accessory is set substantially.In addition, also can keep advantage of the prior art, promptly can obviously reduce the expense that is used for auxiliary welding equipment,, be coupled on the side cover plate, then help the winding of the installation part of heat exchanger by hook portion because sheet material (annex) has hook portion in the end.

Collecting box can constitute one, or is made of a plurality of parts.The feature that constitutes one is, it has U-shaped cross-section, and wherein base part has the aperture of holding, and is used to manage at the end, and two limits constitute two wallboards of collecting box.If this wallboard changes shape, and forms a space, then produce the collecting box that one constitutes.If it is smooth that wallboard keeps substantially, then need second parts, constitute the space of sealing, just produce two-part collecting box.Hold at least one wallboard that directly extends to collecting box in aperture.

Projection to be meeting the mode moulding of purpose, therefore helps its insert action in the flat tube end.

Accessory is wavy sheet material, and it can process easily with deformation technology, is used for making this accessory.According to the meaning of the present invention, notion " sheet material " comprises all possible structure of matter, therefore generally speaking can be called accessory.The projection of mentioning on sheet material or accessory is meant first projection, also exists second projection on sheet material.Second projection is arranged between first projection.Second projection has been improved the installation of heat exchanger, and be following welding sequence improvement preparation.

Method according to manufacturing metallic heat exchanger of the present invention, wherein flat tube and fins set are connected into flat tube-fin combination, managing the end subsequently is installed in the flat tube end, at last, collecting box is installed on the pipe edge at the end with its edge, it is characterized in that the projection that is arranged on the member is inserted in its end in the scope of the narrow limit of flat tube.

The longitudinal edge of collecting box preferably is close on the pipe longitudinal edge at the end from the outside.The narrow limit of flat tube exceeds the pipe longitudinal edge at the end, and the projection that therefore is positioned on the longitudinal edge of collecting box can be inserted into the flat tube scope that this height comes out.Projection is fixed on flat tube under the load condition by this way.

Description of drawings

In two embodiment, described of the present invention with reference to accompanying drawing below.

Fig. 1 shows the disassembled view according to heat exchanger of the present invention;

Fig. 2 shows front view;

Fig. 3 shows vertical view;

Figure 4 and 5 show the part perspective view of heat exchanger;

Fig. 6 shows the overall perspective view of heat exchanger;

Fig. 7 shows the flat tube details;

Fig. 8 and 9 shows another embodiment;

Figure 10 shows according to heat exchanger disassembled view of the present invention;

Figure 11 and 12 shows Manufactured heat exchanger perspective view;

Figure 13 and 14 shows the part perspective view of the heat exchanger that is in assembled state;

Figure 15 shows the favorable structure of projection.

The specific embodiment

All parts of shown heat exchanger all are to be made of metal, preferred aluminum or aluminum alloy, and suitable is all to cover with layer.Each part all is to be made by sheet material as flat tube 1, fin 4, the pipe end 5, collecting box 6 and side cover plate 30, but does not also get rid of other possibility that promptly for example flat tube 1 also can be made the pipe of stretching.The about rectangularity of the cross section of flat tube 1, but narrow limit 2 also can slightly outwards be swelled and arched upward.In an illustrated embodiment, inner inserts is arranged in flat tube 1.Subsequently, flat tube 1 and fin 4 storehouses are used for constituting flat tube-fin combination.Be fixed with the pipe end 5 in the end of flat tube 1, wherein the end of flat tube 1 is arranged in the pipe aperture 21 at the end 5, and the back formation is welded to connect closely herein.Load onto collecting box 6 subsequently, especially as appreciable in Fig. 4, the projection 11 on the edge 10 of collecting box 6 is inserted in the fringe region of flat tube 1, and the narrow limit 2 of this fringe region by flat tube 1 constitutes, and it is outstanding a little from the pipe edge 20 at the end 5.On the pipe edge in aperture 21 at the end 5, preferably have the through hole (not shown), its preferably dorsad collecting box 6, so the flat tube end can not stretch out inwardly, makes the less pressure loss of media implementation that flows in the flat tube 1.Between the pipe aperture 21 at the end 5, exist and connect bar 22.This connects bar 22 can have the shape that is used for improving its rigidity.At last, installation side cover plate 30, it has sealed the end face aperture 60 of collecting box 6 simultaneously.This side cover plate 30 has bowl-shape closure member respectively for this reason on its end, can fit in the aperture 60.By the deformable clamp assemblies 61 that is inserted in the side cover plate breach 62, side cover plate 30 can be realized predetermined fixed, and the part of heat exchanger is combined.In this embodiment, this heat exchanger mainly prepares for carrying out CAB hot weld process.Whole connection all is to finish in the progress of work of candle in the stove.

What meet purpose is that the shape of projection 11 is consistent with the profile phase that flat tube 1 exists in 2 scopes of narrow limit, therefore can simplify insert action, and realizes being welded to connect closely.Therefore absorbed certain manufacturing tolerance.Aspect ranks that are arranged on the fin 4 between the flat tube 1 and height, the interval of the projection 11 on collecting box 6 edges is consistent with the interval of flat tube 1.Must allow certain tolerance herein, can come this tolerance of balance (seeing following description) by the shape of projection 11 to Figure 15 and Figure 16.

Collecting box 6 has production of being easy to especially and simple structure.Only crimping be need carry out twice, two longitudinal panels and a horizontal thumb plate are used for constituting.For example connecting interface 70 also can be realized easily by molding mode.

Should use at the bottom of the pipe that is easy to especially make 5, its sheet material by no end is made, and only need cut into suitable length, because it does not roll the edge on end face.Do not need expensive drawing die for this reason.In Figure 4 and 5, can provide some promptings.Can see on the edge 10 of collecting box 6, having an annex 100 that matches with projection 11 there.It concurs with the corresponding breach 101 of managing on the edge 20, the ends 5, is welded to connect closely in this realization.Can learn also that from Fig. 5 the aperture 21 at the pipe end 5 extends on the edge 20 always, this is clearly shown that with reference marker 22.Therefore when mounted, the pipe end 5, also can be perpendicular to longitudinal direction, or on the direction of the broadside 3 of flat tube end, shifts onto on the flat tube.In the prior art level, the motion on flat tube is vertical is necessary.Be referred to as " putting " pipe end herein.

In Fig. 3 and 6, show in the side cover plate 30 especially, manage the end 5 herein and do not close outstanding from flat tube-fins set.The width of side cover plate 30 probably is equivalent to the size of the broadside 3 of flat tube 1.

Need point out in addition, allow quite easily to enter from the outside, carry out the important connection aspect solder technology according to heat exchanger of the present invention.This important connection is meant the connection at flat tube-pipe end.If carrying out still there is packing less phenomenon after the welding procedure, then can carry out back operation simply accordingly, in second time welding sequence with its elimination, because it is come-at-able to a great extent.But for the heat exchanger by the prior art level, this often is impossible, and giving people's impression is that scrappage is very high.

Fig. 7 schematically shows single flat tube 1, and is in the flat tube end.In heat exchanger, can there be the flat tube 1 of desired amt.The projection 11 that two extensions are all arranged in each flat tube 1, putting in the degree of depth only needs several millimeters, and 10-15mm is just enough.Should be still less in actual conditions.Should understand and be, a projection 11 is positioned on the edge of collecting box 6, and another projection 11 is positioned on another opposite side edge 10 of collecting box 6.Projection 11 closely is attached on the narrow limit 2 of flat tube 1 internally.Have inner inserts 80 in flat tube 1, for the charger-air cooler that loads with the cooling air, it is typical especially especially.But in other cases, fully can this inner inserts.Usually it is very difficult putting into inner inserts 80 in the flat tube 1, therefore in the scope on narrow limit 2, removes the shunt of the pressurized air that is used to flow through as far as possible, and it can exert an adverse impact to the exchange of heat.As shown in Fig. 7, projection 11 has advantageously reduced harmful shunt, and this is another advantage of the present invention.In view, the slight gap in flat tube 1 corner has reason.In reality, it is non-existent, or is closed safely in welding sequence.Above-mentioned gap has also been flattened when inserting projection 11, and projection 11 is fixed two broadsides 3 on the direction of arrow under certain preload pressure.

Fig. 8 and 9 shows alternative design, and projection 11 is arranged on pipe at the end 5.In this case, the pipe end 5, promote on the longitudinal direction of pipe, and projection 11 is inserted in the flat tube end 1 simultaneously.Subsequently, fixing and installation collecting box 6 and side cover plate 30.

At least among the embodiment that in Figure 10-14, describes, all be provided with the collecting box 6 that one constitutes.But regulation in this case, collecting box 6 also has the pipe end 5, therefore not at the bottom of traditional pipe as part, this can find out from the accompanying drawing of mentioning.Collecting box 6 has base part 106, and two bending wallboards of collecting box 6 107 extend out from it.Wallboard 107 is out of shape, and can link together by unshowned longitudinal seam, is used for constituting collecting box 6.Base part 106 be provided be used for the flat tube end hold aperture 21, wherein the interval of flat tube 1 should be consistent with the interval that holds aperture 21.Quite distinctive being characterised in that is held aperture 21 and is extended in the wallboard 107 always, that is to say, promptly extends on the 107 bending edges of the wallboard on the base part 106 always, can be clear that in this mark 22 from Figure 14.In an illustrated embodiment, on the whole wallboard 107 of two collecting boxs 6, has a filler rod (adapter) 110 respectively.On the wallboard 107 of a collecting box 6, filler rod 110 has additional function therein, for example is used for the holding function 90 of unshowned accessory.It is not enforceable measure that filler rod 110 is set on whole wallboard 107.If satisfy additional function 70, it is particularly advantageous that filler rod 110 then is set.In principle, do not stipulate in the present embodiment for this reason, cancel the long and narrow filler rod 110 on the wallboard 107 of left collecting box 6, it does not realize additional function, for realizing previously described solution, that is to say that projection 11 need be set directly on the wallboard 107 of collecting box 6, the pipe end, constitute single parts, as illustrated in the accompanying drawings.

Another advantage of filler rod 110 can draw from accompanying drawing 12.Also can improve the rigidity of collecting box 6 from the filler rod 110 that can find out, have the additional function of mentioning here.Can find out that in Figure 12 filler rod 110 extends on the major part of the wallboard 107 of collecting box, and weld mutually with wallboard 107.

Can find out obviously that from Figure 13 and 14 filler rod 110 is with respect to the layout that is disposed on the projection 11 above it.Projection 11 can be arranged to such profile, is used for simplifying its insert action in the flat tube 1.Between projection 11, this is meant first projection 11, has second projection 12 respectively.As appreciable.Between two first projections 11, be respectively arranged with one second projection 12.If first projection 11 is positioned at the flat tube end, then 12 pairs of filler rods of second projection 110 produce the moment of reaction, and wallboard 107 is separated, and this and imagination are runed counter to.Because second projection 12 is close to respectively on the fin 4 from the outside, this power that just prevented or had the opposite effect at least.

In addition, can see from Figure 13 and 14 to draw that it is favourable in the end of filler rod 110 hook portion 13 being set, be used for side cover plate 30 is fixed on the fin 4 of outside.Therefore before welding, help whole heat exchanger package is connected together.In addition, also help and make above-mentioned filler rod 110 outstanding from the wallboard 107.In addition, can also cancel among Fig. 1 with the shackle shown in the mark 61,62, they should be fixed on side cover plate 30 on the end face aperture 60 of collecting box 6, and this also is favourable on manufacturing technology.

Figure 15 shows the view that has only a projection 11.The style that this projection 11 is pressed cutting teeth 111 constitutes.Therefore can absorb vertical tolerance of flat tube better, its greatly about+/-scope of 1.0mm in.On this projection 11, constitute angular edge 112, its on radius, promptly from projection 11 to collecting box 6 or the accessory or the wallboard at the pipe end transitional region extend.When projection 11 was inserted into the flat tube end, this end was cut at the edge 112 of this wedge angle, and the flat tube that is in the margin of tolerance on the length is opened slightly and this end is outwards rolled.This K from Figure 16 can find out well.Middle pipe is more longer than other pipe of both sides.The wedge angle of projection 11 is for example made by cold forming.Thickness difference between the wallboard of projection 11 and flat tube helps realizing this point.The about thick 1.0-2.0mm of the wallboard of collecting box 6, projection 11 for example also is made of it, and the wallboard thickness of flat tube can be in the scope of 0.05-0.25mm simultaneously.

In a word, the invention provides a kind of innovative product, compare with the prior art level, improvable space is few.

Claims

1. metallic heat exchanger, constitute by flat tube (1) with two narrow limits and two broadsides (2,3) and fin (4), they constitute one group with described flat tube, described heat exchanger or have at least one the pipe end (5) and collecting box (6), the edge (20) of (5) perhaps has at least one collecting box (6) for example by being weldingly connected at the bottom of the edge (10) of wherein said collecting box (6) and the described pipe, and it comprises at the bottom of the described pipe, also has the projection (11) that is provided with at interval

It is characterized in that the interval of described projection (11) is corresponding with the interval of described flat tube (1), make described projection (11) in the scope on described narrow limit (2), be engaged in the end of described flat tube (1).

2. metallic heat exchanger as claimed in claim 1, it is characterized in that, described flat tube (1) projection makes its narrow limit (2) give prominence to the width above (5) at the bottom of the described pipe, and described projection (11) is engaged in the described end of described flat tube (1) in outstanding scope.

3. metallic heat exchanger as claimed in claim 1 is characterized in that, the width at the bottom of the described pipe is outstanding from the described narrow limit (2) of described flat tube (1), and described projection (11) is engaged in the described end of described flat tube (1) in outstanding scope.

4. each described metallic heat exchanger of claim as described above is characterized in that described projection (11) contacts the described narrow limit (2) of described flat tube (1) respectively internally, and preferably welding herein.

5. each described metallic heat exchanger of claim as described above is characterized in that described projection (11) preferably is arranged on the longitudinal edge (10) of described collecting box (6).

6. each described metallic heat exchanger of claim as described above, it is characterized in that, (5) have the edge of rolling in self known mode (20) at the bottom of the described pipe on opposed vertical side, and being used for holding respectively the aperture (21) of a flat tube end (1), wherein said aperture (21) extend into the described longitudinal edge of rolling (20).

7. each described metallic heat exchanger of claim as described above is characterized in that, (5) have only roll edge (20) on two vertical sides at the bottom of the described pipe, and therefore (5) can be made by the single metal sheet of random length at the bottom of the described pipe.

8. each described metallic heat exchanger of claim as described above is characterized in that described collecting box (6) has end face aperture (60).

9. each described metallic heat exchanger of claim as described above, it is characterized in that, described heat exchanger has self known side cover plate (30), and it extends on the length of described flat tube (1), and seals the described end face aperture (60) of described collecting box (6).

10. metallic heat exchanger as claimed in claim 1 is characterized in that, described projection (11) is arranged at the bottom of the described pipe on (5), perhaps it is characterized in that being inserted with the framework of described projection (11).

11. the described metallic heat exchanger of each of claim is characterized in that as described above, described projection (11) is formed on the accessory (110), and its wallboard along described collecting box (6) (107) extends, and is attached thereto.

12., it is characterized in that described collecting box (6) has two wallboards (107) of rolling away from base part (106) as claim 1 and 11 described metallic heat exchangers, described base part (106) be formed be used for described pipe end hold aperture (21).

13. metallic heat exchanger as claimed in claim 12 is characterized in that, describedly holds the described wallboard (107) that described collecting box (6) is stretched in aperture (21).

14., it is characterized in that described accessory (110) roughly entirely is close on the described wallboard (107) of described collecting box (6) from the outside as claim 11 or 12 described metallic heat exchangers.

15. each the described metallic heat exchanger as claim 11-14 is characterized in that described accessory (110) has other function, for example has the holding function (90) or the suchlike function that are used for add-on parts.

16. each the described metallic heat exchanger as claim 11-15 is characterized in that described accessory (110) can have such profile, its profile phase with the described wallboard (107) of described collecting box is consistent.

17. each the described metallic heat exchanger as claim 11-16 is characterized in that described projection (11) is meant first projection (11), wherein said accessory (110) has second projection (12) between described first projection (11).

18. each the described metallic heat exchanger as claim 11-17 is characterized in that, described accessory (110) is formed with the hook portion (13) or the analog of the side cover plate (30) that is suitable for fixing described heat exchanger in the end.

19. the described metallic heat exchanger of each of claim is characterized in that as described above, described projection (11) for example is shaped to taper shape, so that be inserted into the end of described flat tube (1).

20. the described metallic heat exchanger of each of claim is characterized in that as described above, the style that described projection (11) is pressed cutting teeth (111) forms.

21. the described metallic heat exchanger of each of claim is characterized in that as described above, described heat exchanger preferably can be used as air cooled charger-air cooler.

22. a method that is used to make metallic heat exchanger, it has following steps:

Flat tube and fins set are connected into flat tube-fins set;

The pipe end, be arranged on the end of described flat tube;

With the edge placement of collecting box on the edge at the bottom of the described pipe,

It is characterized in that the projection (11) that is arranged on the member is inserted into its end in the scope on the narrow limit (2) of described flat tube (1).

23. manufacture method as claimed in claim 22, it is characterized in that, the longitudinal edge with described projection (11) (10) of described collecting box (6) preferably is mounted on the described edge (20) of (5) at the bottom of the described pipe from the outside, and wherein said projection (11) is inserted into the described end of described flat tube (1).