EP2028431A2 - Multiple chamber flat pipe, heat exchanger and use of a heat exchanger - Google Patents

Abstract

The tube (V8) has side sections, where one of the sections has an edge section (3B) that includes two deforming sections (3B.1-3B.3). One of the deforming sections forming a bearing surface (9) runs diagonal or perpendicular to a wide wall (6). The other deforming section runs diagonal or perpendicular to the former deforming section. An edge section (3A) of other side section is free from the latter deforming section and a part of the wall. The section (3A) has deforming sections e.g. I-shaped deforming sections, which run perpendicular or parallel to the wall.

Description

The invention relates to a Niehrkammer flat tube with at least two chambers for flow absorption of a fluid, produced by forming a sheet metal strip in which a closed profile is formed by: opposing wide walls, which are connected to each other via a respective forming a narrow wall forming areas, wherein the Wide and narrow walls form the outer sides of the profile, wherein a first wide wall is formed with a lying between side portions of the sheet metal strip inner portion of the sheet metal strip and a second wide wall is formed laterally with the inner portion arranged side portions of the sheet metal strip, wherein the first and the second wide wall with a the at least two chambers separating, an inner side of the profile forming web are connected, which web is formed with an edge portion of at least one of the side portions, wherein only one of the side portions has an edge portion, the through end of the second wide wall to the first wide wall, in particular its inner sides, extends and is integrally connected there at a contact point, wherein the continuous edge portion has at least two forming sections and at least one of the forming a contact surface for a Edge portion of the other side portion forms. The invention also relates to a heat exchanger with such a flat tube and a use of the heat exchanger. Furthermore, the invention relates to a multi-chamber flat tube with at least two chambers for flow absorption of a fluid produced by forming a sheet metal strip, in which a closed profile is formed by: opposing wide walls, which are connected to each other over one each forming a forming region narrow walls, wherein the broad and narrow walls form outer sides of the profile, wherein a first wide wall is formed with a lying between side portions of the sheet metal strip inner portion of the sheet metal strip and a second wide wall is formed laterally of the inner portion arranged side portions of the sheet metal strip, wherein the first and the second wide wall with a the at least two Kammem separating, forming an inner side of the profile web are connected. The invention also relates to a heat exchanger with such a flat tube and a connection of the heat exchanger.

Multi-chamber flat tubes prove to be used in a heat exchanger - for example as in EP 1 213 555 B1 described - as increasingly attractive because they can be provided comparatively thin-walled and thus saving material and beyond in a relatively simple forming process, for example in a bending process and / or a folding process and / or a folding process, can be produced - such a forming process for example in US 6,615,488 B2 described. As a result of the folding process described therein results in a multi-chamber flat tube of the so-called "B-type", because the profile of the multi-chamber flat tube has a reminiscent of a B shape course. Another similar multi-chamber flat tube is in EP 1 213 555 B1 and in EP 0 811 820 B1 described. In both multi-chamber flat tubes edge portions of both the second wide wall forming side sections continuously guided from an inner side of the second wide wall to an inner side of the first wide wall and soldered there at a contact point. It has been shown that a multi-chamber flat tube of this so-called B-type is still in need of improvement.

EP 1 225 408 A2 shows a multi-chamber flat tube of the type mentioned, in which only one of the side portions has an edge portion which extends continuously from an inner side of the second wide wall to an inner side of the first wide wall and is integrally connected there at a contact point. The edge section has at least two forming sections and at least one of the forming sections forms a contact surface for an edge section of the other side section. Such an embodiment of a multi-chamber flat tube of the B-type proves to save material in the design of the web, but can still be improved, in particular with regard to the tensile effect to which the web is subjected.

At this point, the invention is whose task is to provide a multi-chamber flat tube, in which, in particular a pulling action of the web, the stability behavior and / or the compressive strength of the Mehrkam-mer flat tube is improved and yet the multi-chamber flat tube comparatively can be produced easily and inexpensively.

The object is achieved by the invention in a first part by means of a multi-chamber flat tube of the initially mentioned type in which according to the invention different variants of features are provided according to the characterizing part of claim 1, which can also be realized in combination with each other.

In a first variant of the contact surface forming the forming portion of the continuous edge portion is oblique or perpendicular to formed second wide wall extending and at least one further forming section of the continuous edge portion is obliquely or at right angles to the forming the contact surface forming portion of the continuous edge portion running formed.

In a second variant of the forming the contact surface forming portion of the continuous edge portion of one of several V-shaped, S-shaped, U-shaped or O-shaped wound or folded arranged Umformabschnitten.

In a third variant, the edge section of the other side section is free of a forming section and part of the second wide wall.

In a fourth variant, the edge portion of the other side portion only at right angles or parallel to second wide wall extending forming sections. In particular, to the edge portion of the other side portion only on I-shaped or L-shaped arranged forming sections.

The invention has recognized that alone or in combination a new advantageous geometry of a profile of the multi-chamber flat tube is realized by the aforementioned variants, in which an increased pressure resistance is given. This is achieved in particular by the fact that the web is designed as a tie rod acting bridge in a manner superior to the prior art. In particular, the edge sections forming the web can be designed for this purpose by means of the forming sections in such a way that the edge sections are in engagement with one another and / or are connected in a materially cohesive manner to a contact surface. The web is connected in accordance with the invention in an advantageous manner cohesively with the first wide wall. This results in an inventively realized for the first time increased pressure resistance in the horizontal and vertical direction of the profile of the flat tube.

Advantageous development of the invention can be found in the dependent claims and specify in detail advantageous ways to realize the above-described concept within the scope of the task and with regard to further advantages.

Preferably, the contact point is formed by a flat contact of a forming section. This makes it possible to realize a web which is fastened particularly securely on the inside of the first wide wall. The same applies to a further preferred development, in which the contact point is formed by a conditioning of a forming edge between two forming sections. In addition, this modification makes it possible to realize a web in which the Zugankerwirkung can be made relatively soft or flexible, that is, the compressive strength at the same time safe and flexible. A comparison of comparatively easily realized connection of the web can be achieved in that the contact point is formed over a system of a joint edge of the continuous edge portion.

A strength of the web can be further improved by the fact that at the contact surface of the at least one of the Umformabschnitte the continuous edge portion and the edge portion of the other side portion a material connection, in particular a solder joint, between the at least one of the Umformabschnitte and the edge portion of the other side portion is formed. This can be achieved by soldering the edge section and / or the forming sections of the continuous edge section one-sidedly or two-sidedly. In simpler cases, it may also be sufficient to have sufficient solder supply on the inside of the first wide wall Provide so that during soldering a sufficient amount of solder in the contact surface extends to set the forming portion of the continuous edge portion and the edge portion of the other side portion in sufficient manner to each other or to connect soldering.

The concept of the invention has proven to be particularly advantageous in a multi-chamber flat tube, in which at least one of the chambers is formed in a single wall. The wall thickness of a chamber can be realized in a preferred manner below 0.2 mm. In principle, the concept of the invention can also be embodied in a multi-chamber flat tube in which at least one of the chambers is formed with a plurality of walls, in particular two walls. Again, it has proven to be advantageous that a wall thickness of a wall is below 0.2 mm - the total wall thickness of a chamber with multiple walls is thus advantageously below a multiple of 0.2 mm, with two walls, preferably below 0.4 mm. A multi-walled multi-chamber flat tube can be done for example by suitable winding arrangements of the sheet metal strip. Alternatively, two or more profiles may be intermeshed to form a concentric wall assembly.

In addition to the above-described, a tensile effect deploying web can be provided to form a multi-chamber flat tube with more than two chambers, one or more other such or other webs in the profile. Preferably, further webs may be formed by folding in the first and / or second wide wall. The latter has proven to be a particularly simple measure for the formation of further webs.

In principle, the surfaces of a multi-chamber flat tube of the type described above in a variety of, appropriate for an application Be formed manner. For example, a tube outer surface and / or a tube inner surface may be smooth. Such a multi-chamber flat tube has a particularly low flow resistance.

In another development which improves the heat exchanger function of the multi-chamber flat tube, a tube outer surface and / or a tube inner surface can be structured. It has been shown that for this purpose a multiplicity of different types of structural elements are suitable, in particular those which are selected from the group consisting of: dimples, winglets, ribs.

A multi-chamber flat tube of the type described above has proved to be particularly reliable for guiding a fluid under increased compressive strength and under particular effect of the tie rod unfolding web according to the concept of the invention. In a particularly preferred development, the fluid may be a first fluid, in particular in the form of an exhaust gas and / or a charge air. In the same way, a multi-chamber flat tube is also suitable for a second fluid, preferably a coolant, in particular a coolant formed on a liquid basis.

A multi-chamber flat tube of the type described above is according to the concept of the invention for a heat exchanger for heat exchange between a first fluid on the one hand, in particular an exhaust gas and / or charge air and a second fluid on the other hand, in particular a coolant. Such a heat exchanger according to the invention comprises: a block for the separate and heat exchanging guidance of the first and second fluid, with a number of flow passages through the first fluid, a first chamber receiving the flow passages through which the second fluid flows and a housing in the first the chamber and the flow channels are arranged. According to the concept of the invention is a flow channel according to the invention formed in the form of a flat tube of the type explained above.

The invention also leads to a particularly preferred use of the heat exchanger according to the further independent claims, for example as a high-temperature or low-temperature heat exchanger - in both cases, for example, as an exhaust gas heat exchanger or as a charge air heat exchanger.

In addition, the use of the heat exchanger according to the concept of the invention has also proven to be suitable as an oil cooler or as a refrigerant or coolant cooler.

The initially described object is achieved by the invention in a second part by means of a multi-chamber flat tube of the last-mentioned type in which according to the invention, according to the characterizing part of claim 19, at least one of the chambers is formed with several walls and the web has at least two of these walls and at least one edge portion of the side portions is fastened to the web. This part of the invention also pursues the concept of a web formed with a comparatively high tensile strength for increasing the compressive strength of the flat tube, wherein in addition the compressive strength of the multi-chamber flat tube is increased by providing a plurality of walls, in particular two walls.

Advantageous developments of the invention can be taken from the further subclaims and specify in particular advantageous ways to realize the above-discussed concept concerning a double-walled multi-chamber flat tube within the scope of the problem as well as with regard to further advantages.

In a particularly preferred development, at least one of the chambers is wound with several walls, in particular two walls. Particularly advantageous in this development, the web also has at least two walls formed as part of the winding. The multi-chamber flat tube can thereby be relatively easily produced by forming the sheet metal strip, for example in a suitably designed winding method.

Preferably, two walls of the web may be formed by a folding.

In a further particularly preferred development, at least one of the chambers can be formed with a plurality of concentrically nested walls, in particular two walls. In this development, the web may preferably have at least two walls formed as part of the walls set into one another.

In a particularly preferred embodiment of the second part of the invention, only one, or more preferably, none of the edge portions of the side portions extends continuously from the second wide wall to the first wide wall, i. especially the insides of the wide walls.

In a first modification of the particularly preferred development, an edge section of at least one of the side sections may adjoin the web. In a particularly simple embodiment, the edge section can abut the web with a joint edge.

In a second modification of the particularly preferred development, the web can be provided with an edge section of at least one of the side sections be formed. Preferably, for this purpose, the edge portion abut with a contact surface on the web.

In a third modification of the particularly preferred development, the abutting edge of the edge section can also be exposed.

As an alternative to the particularly preferred development, an abutting edge of the edge section can be secured to the inside of the first wide wall. This is particularly advantageous for a multi-chamber flat tube, which is formed with a plurality of concentric nested walls.

As already explained in connection with the first part of the invention, a single wall thickness can preferably be below 0.2 mm, and nevertheless a compressive strength of the multi-chamber flat tube can be ensured. This is preferably improved by forming a fluid connection, in particular a solder connection, on one or more contact surfaces or points between walls.

As already explained in connection with the first part of the invention, further webs can be formed, in particular by folding in the first and / or second wide wall. In principle, only tube outer surface and / or inner tube surface can be made smooth or structured depending on the application. The invention also leads to a heat exchanger and a corresponding use of the heat exchanger as can be found in the further independent claims.

The use of the heat exchanger as a high-temperature or low-temperature heat exchanger is advantageous.

The use of the heat exchanger, in particular an exhaust gas heat exchanger, as an exhaust gas cooler for exhaust gas cooling in an exhaust gas recirculation system of an internal combustion engine of a motor vehicle is advantageous.

Advantageously, the use of the heat exchanger, in particular an exhaust gas heat exchanger, as a heater for the interior heating of a motor vehicle.

The use of the heat exchanger as a charge air cooler for direct or indirect cooling of charge air in a charge air supply system for an internal combustion engine of a motor vehicle is advantageous.

It is advantageous to use the heat exchanger as an oil cooler, in particular for cooling engine oil and / or gear oil.

Advantageously, the use of the heat exchanger as a refrigerant or coolant radiator and / or refrigerant or refrigerant condenser in a Kätte- or coolant circuit of an air conditioner or engine cooling circuit of a motor vehicle.

It is advantageous that at least one of the chambers is formed with a plurality of concentrically nested walls, in particular two walls, in particular the web has at least two walls formed as part of the nested walls.

It is advantageous that adjacent to the web, an edge portion of at least one of the side portions, in particular the edge portion abuts with a butt edge on the web.

It is advantageous that the web is formed with an edge portion of at least one of the side portions, in particular the edge portion rests with a contact surface on the web.

It is advantageous that a shock edge of the edge portion is exposed.

It is advantageous that a butt edge of the edge portion is fastened to the first wide wall.

It is advantageous that a wall thickness is formed below 0.2 mm.

It is advantageous that at one or more contact surfaces or points between walls a cohesive connection, in particular solder joint is formed.

It is advantageous that further webs are formed by folding the first and / or second wide wall.

It is advantageous that a tube outer surface and / or a tube inner surface is smooth.

Advantageously, a multi-chamber flat tube for guiding a fluid in a heat exchanger, in particular a first fluid, preferably in the form of an exhaust gas and / or a charge air, or a second fluid, preferably a coolant.

• einen Block zur voneinander getrennten und wärmetauschenden Führung des ersten und des zweiten Fluids, mit
  • einer Anzahl von dem ersten Fluid durchströmbaren Strömungskanälen,
  • eine erste die Strömungskanäle aufnehmende, von dem zweiten Fluid durchströmbare Kammer
  • ein Gehäuse, in dem die Kammer und die Strömungskanäle angeordnet sind;
  dadurch gekennzeichnet, dass
• ein Strömungskanal in Form eines Flachrohres gebildet ist.

Advantageously, a heat exchanger for heat exchange between a first fluid, in particular an exhaust gas and / or a charge air and a second fluid, in particular a coolant, comprising:

• a block for the separate and heat exchanging guidance of the first and the second fluid, with
  • a number of flow channels through which the first fluid can flow,
  • a first the flow channels receiving, can be flowed through by the second fluid chamber
  • a housing in which the chamber and the flow channels are arranged;
  characterized in that
• a flow channel is formed in the form of a flat tube.

The use of the heat exchanger as a high-temperature or low-temperature heat exchanger is advantageous.

The use of the heat exchanger, in particular of an exhaust gas heat exchanger, as exhaust gas cooler for exhaust gas cooling in an exhaust gas recirculation system of an internal combustion engine of a motor vehicle is advantageous.

Advantageously, the use of the heat exchanger, in particular an exhaust gas heat exchanger, as a heater for the interior heating of a motor vehicle.

The use of the heat exchanger as a charge air cooler for direct or indirect cooling of charge air in a charge air supply system for an internal combustion engine of a motor vehicle is advantageous.

It is advantageous to use the heat exchanger as an oil cooler, in particular for cooling engine oil and / or gear oil.

Advantageously, the use of the heat exchanger as a refrigerant or coolant radiator and / or refrigerant or refrigerant condenser in a refrigerant or refrigerant circuit of an air conditioning system of a motor vehicle.

Embodiments of the invention will now be described below with reference to the drawing. This is not necessarily to scale the embodiments, but the drawing, where appropriate for explanation, executed in a schematized and / or slightly distorted form. With regard to supplementing the teachings directly recognizable from the drawing reference is made to the relevant prior art. It should be noted that various modifications and changes in the form and the detail of an embodiment can be made without departing from the general idea of the invention. The features disclosed in the description, in the drawing and in the dependent claims of the invention may be essential both individually and in any combination for the development of the invention. In addition, all combinations of at least two of the features disclosed in the description of the drawing and / or the claims fall within the scope of the invention. The general idea of the invention is not limited to the exact form or detail of the preferred embodiment shown and described below, or limited to an article that would be limited as compared to the subject matter claimed in the claims. With specified design ranges, values lying within the specified limits are also to be disclosed as limit values and to be arbitrarily usable and claimable.

Fig. 1:

eine erste Ausführungsform eines Mehrkammer-Flachrohrs gemäß der ersten Variante des ersten Teils der Erfindung im Profil, bei dem der die Anlagefläche bildende Umformabschnitt des durchgehend verlaufenden Randabschnitts schräg zur zweiten Breitwand verläuft;

Fig. 2:

eine weitere Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß der ersten Variante des ersten Teils der Erfindung;

Fig. 3:

eine weitere Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß der ersten Variante des ersten Teils der Erfindung;

Fig. 4:

eine erste Ausführungsform eines Mehrkammerflachrohres im Profil gemäß der zweiten Variante des ersten Teils der Erfindung, wobei eine Zugankerwirkung vergleichsweise weich oder nachgiebig gestaltet ist;

Fig. 5:

eine weitere Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß der zweiten Variante des ersten Teils der Erfindung;

Fig. 6:

eine weitere Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß der zweiten Variante des ersten Teils der Erfindung;

Fig. 7A, Fig. 7B:

zwei Abwandlungen einer weiteren Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß der zweiten Variante des ersten Teils der Erfindung;

Fig. 8:

eine Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß einer dritten Variante des ersten Teils der Erfindung;

Fig. 9:

eine weitere Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß der dritten Variante des ersten Teils der Erfindung;

Fig. 10:

eine weitere Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß der dritten Variante des ersten Teils der Erfindung;

Fig. 11:

eine Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß einer vierten Variante des ersten Teils der Erfindung;

Fig. 12:

eine Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß einer vierten Variante des ersten Teils der Erfindung;

Fig. 13:

eine weitere Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß der vierten Variante des ersten Teils der Erfindung;

Fig. 14:

eine weitere Ausführungsform eines Mehrkammer-Flachrohres im Profil gemäß der vierten Variante des ersten Teils der Erfindung;

Fig. 15:

eine erste Ausführungsform eines doppelwandigen Mehrkammer-Flachrohres gemäß dem zweiten Teil der Erfindung;

Fig. 16:

eine weitere Ausführungsform eines doppelwandigen Mehrkammer-Flachrohres gemäß dem zweiten Teil der Erfindung;

Fig. 17:

eine weitere Ausführungsform eines doppelwandigen Mehrkammer-Flachrohres gemäß dem zweiten Teil der Erfindung.

In detail, the drawing shows in:

Fig. 1:

a first embodiment of a multi-chamber flat tube according to the first variant of the first part of the invention in profile, in which the forming the contact surface forming portion of the continuous edge portion extends obliquely to the second wide wall;

Fig. 2:

a further embodiment of a multi-chamber flat tube in profile according to the first variant of the first part of the invention;

3:

a further embodiment of a multi-chamber flat tube in profile according to the first variant of the first part of the invention;

4:

a first embodiment of a multi-chamber flat tube in the profile according to the second variant of the first part of the invention, wherein a Zugankerwirkung is designed to be relatively soft or yielding;

Fig. 5:

a further embodiment of a multi-chamber flat tube in the profile according to the second variant of the first part of the invention;

Fig. 6:

a further embodiment of a multi-chamber flat tube in the profile according to the second variant of the first part of the invention;

FIGS. 7A, 7B:

two modifications of a further embodiment of a multi-chamber flat tube in profile according to the second variant of the first part of the invention;

Fig. 8:

an embodiment of a multi-chamber flat tube in profile according to a third variant of the first part of the invention;

Fig. 9:

a further embodiment of a multi-chamber flat tube in the profile according to the third variant of the first part of the invention;

Fig. 10:

a further embodiment of a multi-chamber flat tube in the profile according to the third variant of the first part of the invention;

Fig. 11:

an embodiment of a multi-chamber flat tube in profile according to a fourth variant of the first part of the invention;

Fig. 12:

an embodiment of a multi-chamber flat tube in profile according to a fourth variant of the first part of the invention;

Fig. 13:

a further embodiment of a multi-chamber flat tube in profile according to the fourth variant of the first part of the invention;

Fig. 14:

a further embodiment of a multi-chamber flat tube in profile according to the fourth variant of the first part of the invention;

Fig. 15:

a first embodiment of a double-walled multi-chamber flat tube according to the second part of the invention;

Fig. 16:

a further embodiment of a double-walled multi-chamber flat tube according to the second part of the invention;

Fig. 17:

a further embodiment of a double-walled multi-chamber flat tube according to the second part of the invention.

Fig. 1 shows the profile of a multi-chamber flat tube V1, with a first chamber 1 and a second chamber 2, in this case for the flow absorption of an exhaust gas and / or a charge air in a heat exchanger. The multi-chamber flat tube V1 of Fig. 1 can, as well as the multi-chamber flat tubes V2 to V17 of Fig. 1 to Fig. 17 , in the present case serve as a flow channel in a block for the separate guidance of the exhaust gas and / or the charge air and a coolant in a housing of the heat exchanger. Depending on the intended use, the multi-chamber flat tube may be arranged in a suitable manner with a plurality of other multi-chamber flat tubes in the block, wherein the chambers 1, 2 are provided for flow with the exhaust gas and / or the charge air and the outer space of the multi-chamber flat tube in the Housing is provided for flushing with the coolant. For flow optimization with regard to a flow resistance on the one hand and an improved heat exchange capacity on the other hand, the multi-chamber flat tube V1 as well as the further explained below multi-chamber flat tubes V2 to V17, be provided with a suitable type and number of structural elements, not shown, to heat exchange between exhaust and / or supply air and the coolant to improve. On the other hand, in order to keep a flow resistance particularly low, an outwardly directed tube outer surface facing away from the chambers 1, 2 and / or a tube inner surface facing the chambers 1, 2 can also be made smooth.

The multi-chamber flat tube V1, as well as the other explained multi-chamber flat tubes V2 to V17, can be in the context of a bending, folding and folding - in principle similar to that in US 6,615,488 B2 described - produce particularly simple, but the forming of the sheet metal strip in the region of the web 3 takes place in a modified form.

The multi-chamber flat tube V1 has, as well as the other multi-chamber flat tubes V2 to V17 explained below, an opposing first wide wall 4 and second wide wall 6, which are connected to one another with narrow walls 5, 7 forming one forming area, wherein the wide walls 4, 6 and the narrow walls 5, 7 form outer sides of the profile.

The first wide wall 4 is formed with a lying between side portions of the sheet metal strip inner portion of the sheet metal strip. The second wide wall 6 is formed in a first area 6A with a first side section of the sheet-metal strip arranged laterally of the inner section and formed in a second area 6B with a second side section of the sheet-metal strip arranged laterally of the inner section.

At the in Fig. 1 shown multi-chamber flat tube V1, as well as in the other explained multi-chamber flat tubes V2 to V17, the first and the second wide wall with a at least two chambers separating, forming an inside of the profile web 3 is connected. At the in Fig. 1 explained multi-chamber flat tube V1 - as well as in the Fig. 2 to Fig. 14 explained multi-chamber flat tubes V2 to V14 - the web 3 is formed with an edge portion 3B of the second side portion, which is associated with the second region 6B. Only the edge portion 3B associated with the side section of the region 6B extends continuously from an inner side of the second wide wall 6 to the inside of the first wide wall 4 and is connected to the first wide wall 4 at a contact point 8, in the present case by means of a solder connection. In a manner following the concept of the invention, improving the pulling action of the web 3, the edge section 3B of the profile V1 is presently formed with a first forming section 3B.1 and a second forming section 3B.2 by corresponding bending processes of the edge section 3B. The first forming section 3B.1 forms with the edge section 3A of the other, the first area 6A assigned Side section a contact surface 9. At the contact surface 9, the first forming section 3B.1 and the edge section 3A are soldered together in the present case. In addition, a solder joint is likewise provided on the side 9.1 of the contact surface 9 which opens toward the second wide-wall 6, said solder connection terminating smoothly with the outside of the second wide-wall 6. The second forming section 3B.2 is soldered with its the inside of the first wide wall 4 facing bearing surface 9 in a particularly advantageous manner. By soldering the contact surface 9, 8 - instead of soldering bare abutment surfaces as in the prior art - in the present case a particularly high tensile strength is achieved in the multi-chamber flat tube V1. In addition, in a, following the concept of the first variant of the invention, the contact surface 9 forming forming section 3B.1 of the continuously extending edge portion 3B obliquely to the second wide wall 6, wherein the second forming section 3B.2 obliquely to the first forming section 3B.1 ,

At the following in the Fig. 2 to 17 explained multi-chamber flat tubes V1 to V17 are the same reference numerals used for the same parts or parts with the same function.

Fig. 2 shows a multi-chamber flat tube V2, in which - again following the concept of the first variant of the invention - the contact surface 9 forming the first forming section 3B.1 obliquely to the second wide wall 6, wherein the second forming section 3B.2 perpendicular to the forming section 3B.1 runs. Again, only the edge portion 3B is formed as a continuously extending from the second wide wall 6 to the first wide wall 4, the web 3 forming portion and connected to a contact point 8 cohesively. At the in Fig. 2 illustrated multi-chamber flat tube V2, the contact point 8 is formed by a conditioning of a forming edge between the forming section 3B.1 and the forming section 3B.2. The other edge section 3A assigned to the side section of the area 6A in the present case has a first forming section 3A.1 and a second forming section 3A, wherein the first forming section 3A.1 forms a contact surface 9 with the forming section 3B.1, which also continues as a contact surface between the first forming section 3A.2 and the forming section 3B.2. In the present case, therefore, V-shaped, mutually oriented forming sections 3B.1, 3B.2 or 3A.1, 3A.2 are formed, wherein the edge portions 3B, 3A abut one another in a V-shaped contact surface 9 and the other edge portion 3A is inserted in the continuous edge portion 3B. The thus realized realization of an interlocking, continuous edge portion 3 B and other edge portion 3A thus advantageously causes a tie rod effect, which increases the compressive strength of the multi-chamber flat tube V2 against a lateral pulling, ie against a train in the direction of the narrow walls 5, 7. The contact surface 9 of the multi-chamber flat tube V2 can thus, but need not, be solder plated. In contrast, the tie rod effect of in Fig. 1 To realize multi-chamber flat tube V1 shown, the Lotplattierung the contact surface 9 is such a prerequisite.

Fig. 3 shows an embodiment of a multi-chamber duct V3, similar to that in FIG Fig. 2 In the case of an otherwise similar embodiment, furthermore, the continuous edge section 3B has a first forming section 3B.1, a second forming section 3B.2, a third forming section 3B.3 and a fourth forming section 3B.4. The second and third forming section 3B.2, 3B.3 are presently formed as a fold of sections and return the v-shaped leg of the edge portion 3B to the forming section 3B.4, which advantageously a two-dimensional contact with the contact point 8 to the first Widescreen 4 forms. As a result of the increase in the area of the contact point 8 in contrast to that in the multi-chamber flat tube V2 of Fig. 2 shown contact point 8 here is the attachment of the web and thus the compressive strength in the direction of the wide walls 4, 6 even further increased.

Fig. 4 to Fig. 7B show multi-chamber flat tubes V4 to V7B, which in realization of embodiments of the second variant of the invention have a continuous edge portion 3B, which has V-shaped, S-shaped, U-shaped, O-shaped or wound or folded arranged Umformabschnitte, the will be explained in more detail below. In a particularly advantageous manner is in the in Fig. 4 to Fig. 7B Furthermore, in each case a first forming section 3B.1 oriented at right angles to the second wide wall 6 is oriented, which makes it possible in a particularly simple manner to realize an edge section 3A formed with only a right-angled forming section, around the contact surface 9 between the forming section 3B .1 and the edge portion 3A.

At the in Fig. 4 shown multi-chamber flat tube V4 is formed by the present as folding, indirect structural element of Umformabschnitten 3B.2, 3B.3 a comparatively soft or flexible tie rod in the form of the web 3 between the first wide wall 4 and the second wide wall 6. The continuous edge portion 3B also has an S-shaped structure - oriented horizontally - in the form of the fourth forming region 3B.4 and 3B.5, wherein the fifth forming region 3B.5 - similar to a previously explained, advantageous manner - a contact point 8 in Form of a contact surface to the inner wall of the first wide wall 4 forms.

Fig. 5 shows a further embodiment of a multi-chamber flat tube V5, in which the continuous edge portion 3B formed with forming sections 3B.1, 3B.2, 3B.3, which form as an indirect structural element an S-shaped structure - this time vertically aligned -, in particular to realize a comparatively soft or yielding tie rod effect between first wide wall 4 and second wide wall 6.

In the Fig. 6 to Fig. 7B realized multi-chamber flat tubes V6, V7A, V7B realize the concept of the second variant of the invention, also a comparatively soft or flexible trained tie rod in the form of a web 3, wherein also advantageously a contact point 8 to the first wide wall 4 in a particularly reliable manner is formed as a contact surface. In addition, a lateral, in the direction of the narrow walls 5, 7 acting, pulling action of the web 3 is increased by the fact that the edge portion 3A - the same with reference to Fig. 2 and Fig. 3 explained principle of action - is engaged with the edge portion 3B. The engagement is presently formed with U-shaped forming sections 3B.1, 3B.2, 3B.3 of the edge portion 3B. In order to realize a winding, the forming section 3B.3 is furthermore part of a folding realized with the forming section 3B.4. The transition between forming sections 3B.3 and 3B.4 can, but need not, be positively connected at a contact point 8.1 with the second wide wall 6. The winding is guided with a further forming section 3B.5, which is arranged at right angles to the forming section 3B.4-as the forming section 3B.5 forming the contact point 8-and the last forming section 3B.6 closing the winding. The forming sections 3B.2 to the peripheral forming section 3B.6 thus form a closed winding structure in approximately an O-shape.

Fig. 7A shows an embodiment of a multi-chamber flat tube V7A, in which the indirect structural element of the web 3 in the edge portion 3B instead of o-shaped as in Fig. 6 - Formed with forming sections 3B.3, 3B.4, 3B.5 U-shaped, wherein the forming section 3B.5 forms a flat contact point to the first wide wall 4. Compared to the in Fig. 6 In the case of the multi-chamber flat tube V7A shown, the folding between the forming sections 3B.3 and 3B.4 is not completely closed, but the forming sections 3B.3 and 3B.4 have an acute angle. This implements the related Fig. 6 explained engaging structure, which the advantageous engagement of the edge portion 3A in the edge portion 3B allowed to increase the tie rod effect of the web 3 in the direction of the narrow walls 5, 7. The contact point 8.2 can, in positive engagement, in turn serve to increase the Zugankerwirkung in the vertical direction.

In the Fig. 7B shown embodiment of a multi-chamber flat tube V7B substantially corresponds to that of the embodiment of the multi-chamber flat tube V7A of Fig. 7A In contrast, the forming area between the forming sections 3B.3 and 3B.4 no contact point - as denoted by 8.1 and 8.2 contact point in Fig. 6 and Fig. 7A - forms more, but instead is arranged at a distance 8.3 from the inside of the second wide wall 6. At the in Fig. 7B shown embodiment of the multi-chamber flat tube V7B eliminates the possibility a contact point 8.1, 8.2 to attach to an inside of the second wide-wall firmly bonded. Instead, the distance 8.3 further increases the flexibility of the continuous edge portion 3B formed as an indirect structure.

Nevertheless, the operating principle of an engagement structure of the edge portion 3A in the edge portion 3B is realized by a corresponding nearly U-shaped arrangement of the forming sections 3B.1, 3B.2 and 3B.3, which maintains the explained lateral Zugankerwirkung the web 3, without an additional To provide solder plating.

Fig. 8 to Fig. 10 show embodiments of multi-chamber flat tubes V8 to V10 according to the concept of the third variant of the invention, in which one edge portion 3A of the other portion 6B associated Seitenab-section is free of a forming section and rather part of the second portion 6B of the second wide wall 6. The embodiments of the multi-chamber flat tubes V8 to V10 are therefore particularly easy to produce, since the edge region 3A is undeformed and formed straight as part of the second region 6B of the second wide wall 6. Only the continuous edge portion 3B is present as a deformed band edge with forming sections 3B.1, 3B.2 and 3B.3 formed. In each case, the forming sections 3B.1 and 3B.2 advantageously form the contact surface 9 between the edge section 3A and the forming section 3B.2 in the case of the multi-chamber flat tubes V8, V9, V10. The forming sections 3B.1 and 3B.2 form a pawl-shaped receptacle with stop for the edge section 3A. In the embodiment of the multi-chamber flat tube V9 in Fig. 9 closes at the forming section 3B.2 a perpendicular to the broad wall 4, 6 oriented folding structure by forming section 3.B.3 and 3B.4, wherein the folding structure a contact point 8 to the first wide wall and - in addition to multi-chamber flat tube V8 - with the abutting edge of Umformabschnitts 3B.4 forms a contact point 8.1 with the second wide wall 6.

At the in Fig. 10 shown embodiment of a multi-chamber flat tube V10, a similar folding structure is arranged horizontally to the first wide wall 4 and second wide wall 6 and formed with Umformabschnitten 3B.2 and 3B.3, wherein another forming section 3B.4 advantageously formed as a partial web folding 4.1 first wide wall 4 engages behind. Thus, in turn, the principle of a lateral tension-preventing lateral tie rod in the form of the web 3 is realized. Nevertheless, also at the in Fig. 10 shown embodiment of the multi-chamber flat tube V10 only the edge portion 3B is a continuously extending from the second wide wall 6 to the first wide wall 4 edge portion. A contact point 8 is formed in the multi-chamber flat tubes V8 to V10 each have a line-shaped system. In the multi-chamber flat tube V8, this is a joint edge of the continuous edge portion 3B. In the multi-chamber flat tube V9 in Fig. 9 this is a forming area of the continuous edge portion 3B between the forming portions 3B.3 and 3B.4. At the in Fig. 10 shown multi-chamber flat tube V10 this is the contact line at the contact point 8 between the folding structure 4.1 and the lateral surface of the forming section 3B.3. At the in Fig. 10 shown embodiment of a multi-chamber flat tube In addition, V10 eliminates two-sided solder plating, in contrast to the multi-chamber flat tube V9, and yet a tie rod effect is also ensured in the lateral direction.

The multi-chamber flat tubes V8 to V10 are therefore comparatively easy to manufacture embodiments - according to the concept of the third variant of the invention - yet the formation of the continuous edge portion 3B forms a substantially indirect structure, which is the preferred rather soft or yielding Tie rod effect - similar to that in the embodiments V4 to V7 - leads. It has been found that by providing such an indirect structure - i. Following the concept of the second variant of the invention - a multi-chamber flat tube is particularly easy to calibrate, i. by a slight excess of formed by bending or bending forming sections 3B., 3.B.1, etc., a contact 8 is ensured in a particularly secure manner. In addition, a contact surface 9 between the edge section 3A and the edge section 3B or a corresponding forming section 3B.2 can also be realized particularly reliably.

The embodiments of multi-chamber flat tubes V11 to V14 realize - according to the concept of the fourth variant of the invention - particularly simple embodiments, in which a continuous edge portion 3B as shown in the embodiment V11 forms an angular structure with forming sections 3B.1 and 3B.2 while the edge portion 3A is formed as a simply folded-over band end, ie has an I-shaped course. Again contacted only at the contact point 8 a contact surface of the edge portion 3 B, the first wide wall 4 on the inside. A Zugankerwirkung in the embodiments of the multi-chamber flat tubes V11 and V12 can be additionally secured in a special way by a two-sided Lotplattierung, in particular at the contact point 8 and the contact surface. 9

As shown in the multi-chamber flat tube V12, the edge portion 3A may also be formed by another forming section 3A.2, ie, to form an L-shaped course, or as in the embodiment of the multi-chamber flat tube V14 in FIG Fig. 14 shown to be supplemented by a folding structure with a forming section 3A.2.

Likewise, in addition or as an alternative to the aforementioned measures, as exemplified in Fig. 12, Fig. 13 and Fig. 14 shown, the I-shaped structure of the continuous edge portion 3B are supplemented with a further forming section 3B.3, which forms a fold together with the forming section 3B.2. This forms similar to Fig. 11 and Fig. 12 the forming section 3B.2, now the forming section 3B.3 a contact point 8 to the inside of the first wide wall. 4

Fig. 15 to Fig. 16 show embodiments of multi-chamber flat tubes V15, V16, V17, which exemplify the concept of the second part of the invention, in which a multi-chamber flat tube is double-walled and following a web 3 is at least double-walled with participation of these chamber walls and no edge portion continuous between the broad walls 4, 6 runs. In the multi-chamber flat tubes V15 and V16, the profile is wound from a sheet metal strip, wherein at the in Fig. 15 In the embodiment shown, the web 3 is formed exclusively by the winding structure, while the web 3 is adjoined by an edge section 3A of the side sections assigned to the regions 6A, 6B. In this case, an edge portion 3A abuts with a collision edge on the web.

In a modification to the bridge 3 at the in Fig. 16 embodiment shown formed vierwandig, wherein the two middle walls of the web 3 are formed by a folding 3.1 and the two outer walls of the web 3 are formed as part of the winding. In addition, only in the lower part of the Web 3, adjacent to the web 3, an edge portion 3A formed with a contact surface on the web fitting. In this case, an abutting edge of the edge section 3 is exposed in the edge direction of the web 3.

Fig. 17 shows an evolution of the in US 6,615,488 B2 shown multi-chamber flat tube, in which a web 3 is formed four-walled and the multi-chamber flat tube V17 is composed essentially of three profiles. The third profile V17.13 is like in US 6,615,488 B2 described, while to improve the compressive strength in the profile V17.3 another, inner profile V17.1 to form the first chamber 1 and a further inner profile V17.2 is used to form the second chamber 2 concentric. This has the particular advantage that it is possible to install structures in the inner area of the chambers 1, 2 and yet to have a smooth surface on the outside, ie on the outer surface of the profile V17.3 facing the surroundings, in order to have a smooth surface there, for example Rippenverlötung od. Like. To install. Such a design of the multi-chamber flat tube - similar to a duplex tube - thus advantageously allows the independent design of a chamber inside and an outside of the multi-chamber flat tube to account for the different flow characteristics and fluids. In the present case, the web 3 is formed in a special way in that a abutting edge of the edge section 3 A is fastened to the inside of the first wide wall 4.

It goes without saying that the embodiments explained here can also be executed laterally reversed - horizontally and vertically - to the possibilities presented here and, moreover, feature combinations of all embodiments can be made.

In summary, the invention relates to a multi-chamber flat tube V1 - V17 with at least two chambers 1, 2 for flow absorption of a Fluids produced by forming a sheet metal strip, in particular produced in a bending and / or folding and / or folding process, in which a closed profile is formed by: opposing wide walls 4, 6, the opposite each forming a forming region narrow walls. 5 7, wherein the broad and narrow walls form the outer sides of the profile, wherein a first wide wall 4 is formed with a lying between side portions of the sheet metal strip inner portion of the sheet metal strip and a second wide wall 6 is formed laterally of the inner portion disposed side portions of the sheet metal strip , wherein the first and the second wide walls 4, 6 are connected to a web 3 separating the at least two chambers 1, 2 and forming an inner side of the profile, which is formed with a marginal portion 3A, 3B of at least one of the side portions, only one of the Side sections has an edge portion 3 B, the dur extending from the second wide wall 6 to the first wide wall 4 and there is integrally connected to a contact point 8, in particular soldered, wherein the edge portion 3 B at least two forming sections 3B.1, 3B.2, 3B.3, 3B.4, 3B. 5 and at least one of the forming sections forms a contact surface a for an edge portion 3A of the other side portion. To improve such a multi-chamber flat tube, the invention provides the following, optionally in combination, possible measures. In a first variant of the contact surface a forming forming portion of the continuous edge portion 3B obliquely (V1-V3) or at right angles (V11-V14) to the second wide wall 6 and at least another forming section of the continuous edge portion 3B obliquely (V1-V3) or at right angles (V11-V14) to the forming the forming surface a forming section continuously extending edge portion. In a second variant of the contact surface a forming forming portion of the continuous edge portion 3B may be one of several v-shaped, s-shaped, u-shaped or o-shaped or wound or folded arranged Umformabschnitten (V4-V7). In a third variant For example, the edge portion 3A of the other side portion may be free of a forming portion and part of the first or second portion of the second wide wall 6 (V8-V10). In a fourth alternative, the edge section 3A of the other side section can only have forming sections running at right angles or parallel to the second wide wall. The invention also leads to a multi-chamber flat tube (V15-V17) in which at least one of the chambers is formed with several walls, in particular two walls, and the web 3 has at least two walls and at least one edge portion 3A of the side portions is secured to the web. Furthermore, the invention leads to a corresponding heat exchanger and a corresponding use of the heat exchanger.

Claims (15)

Multi-chamber flat tube (V1-V14) with at least two chambers (1, 2) for the fluid intake of a fluid,
manufactured by forming a sheet metal strip, in particular produced in a bending and / or folding and / or folding method, in which a closed profile is formed by: opposing wide walls (4, 6), which are connected to one another via opposite, each forming a forming region narrow walls (5, 7), wherein the broad and narrow walls form the outer sides of the profile, wherein a first wide wall (4) is formed with an inner portion of the sheet metal strip located between side sections of the sheet metal strip, and
a second wide wall (6) is formed with laterally disposed side portions of the inner portion of the sheet metal strip, wherein the first and the second wide walls (4, 6) are connected to a web (3) which separates the at least two chambers and forms an inner side of the profile, which web is formed with an edge section (3A, 3B) of at least one of the side sections only one of the side portions has an edge portion (3B) extending continuously from the second wide wall (6) to the first one Wide wall (4) extends and there at a contact point (8) materially connected, in particular soldered, is, where the continuous edge section (3B) has at least two forming sections (3B.1, 3B.2, 3B.3, 3B.4, 3B.5) and at least one of the forming sections has a contact surface (9) for one edge section (3A) of the other side section forms characterized in that a) of the contact surface (9) forming forming portion of the continuous edge portion (3B) obliquely (V1-V3) or at right angles (V11-V14) to the second wide wall (6) and at least one further forming section of the continuous edge portion (3B) obliquely (V1-V3) or at right angles (V11-V14) to the forming the contact surface (9) forming section of the continuous edge portion (3B) extends; and or b) the forming of the contact surface (9) forming portion of the continuous edge portion (3B) of a plurality of V-shaped, S-shaped, U-shaped or O-shaped or wound or folded arranged Umformabschnitten (V4-V7); and or c) the edge portion (3A) of the other side portion is free of a forming section and is part of the second wide wall (6) (V8-V10) and / or d) has the edge portion (3A) of the other side portion only at right angles or parallel to the second wide wall extending forming sections (V11-V14), in particular only i-shaped or I-shaped arranged Umformabschnitte. Multi-chamber flat tube according to claim 1, characterized in that the contact point (8) is formed over a flat contact of a forming section. Multi-chamber flat tube according to claim 1 or 2, characterized in that
the contact point (8) is formed by an abutment of a forming edge between two forming sections. Multi-chamber flat tube according to one of claims 1 to 3, characterized in that
the contact point (8) is formed over an abutment of a joint edge of the continuous edge section (3B). Multi-chamber flat tube according to one of claims 1 to 4, characterized in that
on the contact surface (9) a cohesive connection, in particular solder joint, is formed between the at least one of the forming portions of the continuous edge portion (3B) and the edge portion (3A) of the other side portion. Multi-chamber flat tube according to one of claims 1 to 5, characterized in that
at least one of the chambers (1, 2) is single-walled, in particular with a wall thickness below 0.2mm, is formed. Multi-chamber flat tube according to one of claims 1 to 5, characterized in that
at least one of the chambers (1, 2) with a plurality of walls, in particular two walls, is executed, in particular with a Wall thickness below 0.2 mm, preferably wound or formed by concentric nested walls Multi-chamber flat tube according to one of claims 1 to 7, characterized in that
further webs are formed by folding the first and / or second wide wall. Multi-chamber flat tube according to one of claims 1 to 8, characterized in that
a pipe outer surface and / or a pipe inner surface is smooth. Multi-chamber flat tube according to one of claims 1 to 9, characterized in that
a tube outer surface and / or a tube inner surface is structured, in particular one or more types of structural elements, which are selected from the group consisting of: dimples, winglets, ribs. Multi-chamber flat tube according to one of claims 1 to 10 for guiding a fluid in a heat exchanger, in particular a first fluid, preferably in the form of an exhaust gas and / or a charge air, or a second fluid, preferably a coolant. Heat exchanger for heat exchange between a first fluid, in particular an exhaust gas and / or a charge air and a second fluid, in particular a coolant,
comprising: a block for the separate and heat exchanging guidance of the first and the second fluid, with a number of flow channels through which the first fluid can flow, - A first the flow channels receiving, can flow through the second fluid chamber - A housing in which the chamber and the flow channels are arranged; characterized in that a flow channel in the form of a flat tube is formed according to one of the preceding claims. Multi-chamber flat tube (V15-V17) with at least two chambers (1, 2) for fluid intake of a fluid produced by forming a metal strip, in particular produced in a bending and / or folding and / or folding process, in which formed a closed profile is through: opposing wide walls (4, 6), which are connected to one another via opposite, each forming a forming area narrow walls (5, 7), wherein the wide and narrow walls form the outer sides of the profile, wherein a first wide wall (4) is formed with an inner portion of the sheet metal strip located between side sections of the sheet metal strip, and a second wide wall (6) is formed with laterally disposed side portions of the inner portion of the sheet metal strip, wherein the first and the second wide walls (4, 6) are connected to a web (3) which separates the at least two chambers and forms an inner side of the profile, characterized in that
at least one of the chambers (1, 2) is formed with a plurality of walls, in particular two walls, and the web (3) has at least two of these walls and at least one edge portion (3A) of the side portions is secured to the web. Multi-chamber flat tube according to claim 13,
characterized in that
at least one of the chambers (1, 2) having a plurality of walls, in particular two walls, is wound, in particular the web has at least two walls formed as part of the winding (V15, V16). Multi-chamber flat tube according to claim 13 or 14,
characterized in that
two walls of the web (3) are formed by a folding (V16).

Images