EP2020582A2 - Flat pipe for a heat exchanger - Google Patents
Flat pipe for a heat exchanger Download PDFInfo
- Publication number
- EP2020582A2 EP2020582A2 EP08013006A EP08013006A EP2020582A2 EP 2020582 A2 EP2020582 A2 EP 2020582A2 EP 08013006 A EP08013006 A EP 08013006A EP 08013006 A EP08013006 A EP 08013006A EP 2020582 A2 EP2020582 A2 EP 2020582A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- flat tube
- fold
- tube according
- web
- flat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
- F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
Definitions
- the invention relates to a flat tube for a heat exchanger according to the preamble of claim 1.
- Flat tubes for heat exchangers with at least one partition can be prepared by various methods, eg. B. by extrusion or by forming a sheet metal strip, which is closed longitudinally either by a weld or a solder seam.
- soldered flat tubes the solder seam is in the region of the partition, so that the tube is sealed on the one hand to the outside and on the other hand between the flow channels formed by the partition wall.
- a solder solder plating is usually used, which is applied to the outside of the flat tube.
- a problem in the production of folded and brazed pipes with at least one partition wall is that the bandwidth of the metal strip to be formed is subject to tolerances, which can lead to different widths of the flat tube when forming a flat tube, for. B. if the partition is formed only by beveled at the edges of the metal strip webs. For the production of heat exchangers, however, a narrow tolerance tube width is required.
- soldered flat tube with at least one partition, which by bevelled, to each other lying, with each other soldered webs is formed.
- the webs are bent over at the ends and lie on the inside of the flat tube, resulting in a dense and stable solder joint on the one hand to the outside and on the other hand also between the adjacent flow channels.
- a solder plating is provided on the outside of the flat tube here.
- the measure of the seam height h and the sheet thickness d determine the dimension of the pipe width b and that tolerances and / or deformation-related dimensional deviations of the web dimension by the Fold height h to be recorded. Deviations of the ridge size, which result from tolerances of the bandwidth (the width of the sheet metal strip) or caused by the forming process, thus do not affect the pipe width b.
- the production of the seam with the seam height h is thus the starting point of the tube forming process, while the webs which are joined last are dimensioned such that they can not influence the pipe width.
- the fold or folds are formed from a first flat side of the flat tube, while the webs of the second, d. H. opposite side and the edge strip of the strip material are angled.
- two folds are arranged side by side, which form a gap in which the webs are received.
- the webs may be single-layered or double-layered - in the latter case, they have an envelope.
- the webs are dimensioned so that there is always some air between the edge of the web and the inside of the flat pipe. H. a gap is left so that the ridge size can not influence the pipe width. Due to the double position of the bridge, d. H. Bridge with turn-up result for the partition six, seven or eight layers, whereby a high intrinsic stability is achieved.
- At least one of the webs may have an end-side bevel, which rests on the flat tube. This also results in an increase in stability.
- a partition wall which comprises only one fold and two webs arranged next to the fold.
- the webs may be single or double-layered, ie formed with an envelope, wherein the single-layer web can in turn be folded at the ends. This also makes a flat tube with a high inherent stability against deformation reached.
- the partition may thus comprise four, five or six layers.
- a three-layer partition is provided, which is constructed only of a fold and a web, wherein both the fold and the web are formed by forming the edge strips of the strip material.
- the web is enclosed by the fold, so that there is a tight soldering within the fold.
- an internal plating is necessary so that the fold can also solder to the inside of the flat tube.
- the advantage is achieved that the web height in conjunction with the sheet metal strip thickness determines the width of the tube and the ridge size remains without influence.
- solder plating on the outside is sufficient to achieve a fluid tight connection in the partition wall area both outwardly and between the adjacent flow channels. Since no internal plating is necessary in this case, a protective plating or a corrosion-inhibiting coating can instead be made, which is advantageous for certain fluids, in particular coolants.
- the protective cladding is not solderable.
- the metal strip is made of an aluminum material or an aluminum alloy, which may be provided with a commercially available Lotplatt ist, preferably on the outside, if necessary, also on the inside.
- Fig. 1 shows a flat tube 1, which is made by forming a metal strip 2 and two chambers or flow channels 3, 4, which are separated by a multi-layer partition 5 from each other.
- the flat tube 1 has a first, lower flat side (also called a flat side) 1a and a second, upper flat side 1b, which are connected to each other at the end by rounded narrow sides 1c, 1d.
- the flat tube 1 has a depth t and a width b.
- the flat tube 1 is preferably used in a heat exchanger use and is the front side, flows from the narrow side 1c or 1d of air and flows through a liquid coolant.
- the partition wall 5 must therefore separate the flow channels 3, 4 tightly from each other, in particular, when the flow direction in the flow channels 3, 4 extends in opposite directions.
- the sheet-metal strip 2 is made of an aluminum material and preferably provided on one side with a Lotplatt ist. After the forming process, the flat tube 1 is soldered so that it is sealed to the outside and inside (between the adjacent flow channels 3, 4).
- Fig. 1a shows an enlarged view of the region of the partition wall 5, which is formed by six layers of the sheet-metal strip 2.
- the thickness of the sheet metal strip is denoted by d.
- From the lower flat side 1 a two folds 6, 7 are formed, which leave a gap 8 of the width e between them. Within the gap 8, two webs 9, 10 are added, which are angled perpendicularly from the edge strips of the sheet metal strip.
- the sheet-metal strip 2 has on one side a Lotplatt ist, not shown, which forms the outside of the flat tube 1.
- solder surfaces 11, 12, 13 result between the folds 6, 7 and between the webs 9, 10.
- a tightness of the flat tube 1 is ensured to the outside.
- the end edges of the webs 9, 10 are soldered to the bottom of the gap 8, which can be done by capillary action of the solder present on the outside.
- both sides of the sheet metal strip 2 with a Lotplatt ist - then all contact surfaces of the six-layer partition 5 are soldered together.
- the two folds 6, 7 each have a height f, which together with the sheet metal strip thickness d gives the dimension b for the tube width.
- the webs 9, 10 have a web height s, which is smaller than the seam height f even at the most unfavorable tolerance deviation.
- Fig. 2 shows a second embodiment of the invention for a flat tube 20 with a modified partition 21, which in Fig. 2a is enlarged.
- the partition wall 21 is formed six layers, ie six layers of the sheet metal strip are adjacent to each other and are soldered together.
- the webs 22, 23 are formed in two layers, ie they each have an envelope 22a, 23a. From the lower flat side 21 a two folds 24, 25 are formed, which leave a gap 26 between them, which receives the double-layered webs 22, 23.
- the additional two layers results in an increased intrinsic stability the tube already in unsoldered condition.
- a solder plating is provided on the outside of the flat tube 20, resulting in a soldering of the webs 22, 23 both together and on the contact surfaces with the two folds 24, 25 results. This sealing is achieved inwards and outwards. If necessary, in this embodiment, therefore, a corrosion-inhibiting layer or a Schutzplatttechnik (which is not soldering) are applied.
- Fig. 3 shows a third embodiment of the invention for a flat tube 30 with a modified partition wall 31, which increases in Fig. 3a is shown.
- the partition is formed seven layers and has two folds 32, 33, a single-layer web 34 and a two-layer web 35 within the folds 32, 33.
- the partition wall 31 is thus formed asymmetrically.
- a Lotplatt réelle on the outside of the flat tube 30 is sufficient for a sufficient seal to the outside and inside, so that here also a Schutzplatt réelle on the inside can be made if necessary.
- Fig. 4 shows two process steps of the forming process for the above-mentioned flat tube, in particular the embodiment according to Fig. 2 ,
- the output stage of the method is an endless flat sheet metal strip 40 which has outer edge strips 40a, 40b and a width c.
- the sheet-metal strip 40 is a semi-finished product, which is unwound from a coil (not shown) and fed to a pipe forming machine, not shown.
- the width c is subject to certain manufacturing tolerances, ie the nominal size may vary up or down. These deviations must be compensated during the forming of the sheet metal strip. This happens as described above.
- the flat sheet metal strip 40 is formed in various stages in the tube forming machine to a finished flat tube, wherein in Fig.
- the established band sections are bent with the webs 43, 44 corresponding to the two arrows P1, P2 inward until the double-layered webs 43, 44 engage between the two folds 41, 42 and thus according to the Fig. 2a are accurately positioned.
- the width of the finished tube then corresponds - as stated above - the sum of seam height f and tape thickness d.
- the endless manufactured flat tube is cut to length and completed with ribs, not shown, to a flat-tube heat exchanger, also not shown. Thereafter, the soldering process for the entire heat exchanger. From this it is clear that the flat tube after the forming process and before the soldering process is subjected to various other production stages in which it must retain its shape, which is ensured by the increased intrinsic and dimensional stability.
- Fig. 5 shows a fourth embodiment of the invention for a flat tube 50 with a modified partition 51, which in Fig. 5a is shown enlarged.
- the partition 51 represents a development of the embodiment according to Fig. 3a it has two spaced-apart folds 52, 53 and a double-layered web 54 and a single-layer web 55, which has a fold 55a in the direction of the double-layered web 54 at its end.
- the double-layer web 54 rests on the folded portion 55a, which in turn rests on the inside of the flat tube.
- a Lotplatttechnik on the outside and, if necessary, a Schutzplattmaschine provided on the inside.
- Fig. 6 shows a fifth embodiment of the invention for a flat tube 60 with a partition 61, which increases in Fig. 6a is shown.
- the partition 61 is five-ply and comprises a fold 62, a double-ply Bridge 63 and a single-layer, inwardly beveled web 64.
- a Lotplatt ist on the outside enough for a tightness to the outside and inward, ie a Schutzplatt réelle on the inside is possible.
- only one fold 62 is provided, on which the two webs 63, 64 create from one side.
- Fig. 7 shows a sixth embodiment of the invention for a flat tube 70 with a partition 71, which increases in Fig. 7a is shown.
- the partition wall 71 constitutes a modification of the embodiment Fig. 6a It is also five-ply and is formed by a fold 72, a two-ply web 73 and a single-layer web 74 with a fold 74a, which rests on the inside of the flat tube 70.
- the fold 74a is remote from the partition 71.
- Fig. 8 shows a seventh embodiment of the invention for a flat tube 80 with a simplified partition 81, which increases in Fig. 8a is shown.
- the flat tube 80 has a lower flat side 80a and an upper continuous flat side 80b.
- the partition wall 81 is formed in three layers and comprises a fold 82 and a single-layer web 83, which is arranged between the two layers 82a, 82b of the fold 82.
- a mutual Lotplatt ist attached is attached.
- the height of the fold 82 is again indicated by f, the height of the ridge 83 by s and the width of the tube by b. Between the end edge of the web 83 and the inner arc of the fold, in turn, a gap a is left, so that the tube width is uniquely determined by the pre-stamped fold 82.
- Fig. 9 shows an application example of the flat tube according to the invention, here the flat tube 1 according to the embodiment according to Fig. 1, 1a ,
- the flat tubes 1 are joined with corrugated fins 90 to a single-row heat exchanger block 91.
- the flat tubes 1 have due to the partition wall 5 on two flow channels 3, 4, which are flowed through in the same or opposite directions by a heat transfer medium, here preferably by a coolant.
- the ribs 90 are overflowed by air.
- the heat exchanger can preferably be used as a coolant radiator or radiator for a motor vehicle.
- the ends of the flat tubes 1 are connected by soldering to tube sheets, not shown. It is advantageous that the flat tubes have as smooth outer sides, so that there is a dense soldering.
- the entire heat exchanger, z. B. a so-called Ganzaluminiumkorauertrager soldered in one operation in a soldering furnace, not shown.
- the flat tube according to the invention described above has the following dimensions:
- the width b of the flat tube, optionally including the Lotplatt ist, is in a range of 0.5 to 10 mm, preferably in the range of 0.8 to 4 mm.
- the thickness d of the sheet metal strip is in a range of 0.08 to 2 mm, preferably in a range of 0.1 to 0.6 mm.
- the depth t of the flat tube is in a range of 6 to 100 mm, preferably in a range of 10 to 50 mm.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Die Erfindung betrifft ein Flachrohr für einen Wärmeübertrager nach dem Oberbegriff des Patentanspruches 1.The invention relates to a flat tube for a heat exchanger according to the preamble of claim 1.
Flachrohre für Wärmeübertrager mit mindestens einer Trennwand können nach verschiedenen Verfahren hergestellt werden, z. B. durch Extrusion oder durch Umformung aus einem Blechband, welches längsseitig entweder durch eine Schweiß- oder durch eine Lötnaht geschlossen wird. Bei gelöteten Flachrohren liegt die Lötnaht im Bereich der Trennwand, sodass das Rohr einerseits nach außen und andererseits zwischen den durch die Trennwand gebildeten Strömungskanälen abgedichtet ist. Als Lot wird meistens eine Lotplattierung verwendet, die auf der Außenseite des Flachrohres aufgebracht ist. Ein Problem bei der Herstellung von gefalzten und gelöteten Rohren mit mindestens einer Trennwand besteht darin, dass die Bandbreite des umzuformenden Blechbandes Toleranzen unterworfen ist, welche bei der Umformung zu einem Flachrohr zu unterschiedlichen Breiten des Flachrohres führen können, z. B. wenn die Trennwand lediglich durch an den Rändern des Blechbandes abgekantete Stege gebildet wird. Für die Herstellung von Wärmeübertragern ist jedoch eine eng tolerierte Rohrbreite erforderlich.Flat tubes for heat exchangers with at least one partition can be prepared by various methods, eg. B. by extrusion or by forming a sheet metal strip, which is closed longitudinally either by a weld or a solder seam. In soldered flat tubes, the solder seam is in the region of the partition, so that the tube is sealed on the one hand to the outside and on the other hand between the flow channels formed by the partition wall. As a solder solder plating is usually used, which is applied to the outside of the flat tube. A problem in the production of folded and brazed pipes with at least one partition wall is that the bandwidth of the metal strip to be formed is subject to tolerances, which can lead to different widths of the flat tube when forming a flat tube, for. B. if the partition is formed only by beveled at the edges of the metal strip webs. For the production of heat exchangers, however, a narrow tolerance tube width is required.
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Es ist Aufgabe der vorliegenden Erfindung, ein Flachrohr der eingangs genannten Art derart zu gestalten, dass Toleranzen (Maßabweichungen) in der Breite des Bandmaterials die Breite des Flachrohres im Bereich der Trennwand möglichst nicht beeinflussen. Es ist auch Aufgabe der Erfindung, dass das Flachrohr vor dem Lötprozess eine hinreichende Formstabilität besitzt. Ferner soll das Flachrohr die Möglichkeit bieten, dass auf seiner Innenseite eine korrosionshemmende Beschichtung aufgebracht werden kann.It is an object of the present invention to design a flat tube of the type mentioned above such that tolerances (dimensional deviations) in the width of the strip material do not influence the width of the flat tube in the region of the partition wall as much as possible. It is also an object of the invention that the flat tube has a sufficient dimensional stability before the soldering process. Furthermore, the flat tube should offer the possibility that on its inside a corrosion-inhibiting coating can be applied.
Die Aufgabe der Erfindung wird durch die Merkmale des Patentanspruches 1 gelöst. Erfindungsgemäß ist vorgesehen, dass das Maß der Falzhöhe h und der Blechdicke d das Maß der Rohrbreite b bestimmen und dass toleranz- und/oder umformbedingte Maßabweichungen des Stegmaßes durch die Falzhöhe h aufgenommen werden. Abweichungen des Stegmaßes, welche sich aus Toleranzen der Bandbreite (der Breite des Blechbandes) ergeben oder durch den Umformprozess entstehen, wirken sich somit nicht auf die Rohrbreite b aus. Die Herstellung des Falzes mit der Falzhöhe h ist somit der Ausgangspunkt des Rohrumformprozesses, während die Stege, die zuletzt gefügt werden, derart bemessen sind, dass sie die Rohrbreite nicht beeinflussen können. Durch die Ausbildung mindestens eines Falzes in Verbindung mit mindestens einem Steg ergibt sich nach dem Umformprozess ein Flachrohr mit einer verbesserten Eigenstabilität und Formsteifigkeit, welche eine Verformung durch Biegen und/oder Torsion bereits vor dem anschließenden Lötprozess verhindert bzw. vermindert.The object of the invention is solved by the features of claim 1. According to the invention, it is provided that the measure of the seam height h and the sheet thickness d determine the dimension of the pipe width b and that tolerances and / or deformation-related dimensional deviations of the web dimension by the Fold height h to be recorded. Deviations of the ridge size, which result from tolerances of the bandwidth (the width of the sheet metal strip) or caused by the forming process, thus do not affect the pipe width b. The production of the seam with the seam height h is thus the starting point of the tube forming process, while the webs which are joined last are dimensioned such that they can not influence the pipe width. By forming at least one fold in conjunction with at least one web results after the forming process, a flat tube with improved inherent stability and stiffness, which prevents deformation by bending and / or torsion before the subsequent soldering or reduced.
Nach einer bevorzugten Ausführungsform werden der Falz oder die Falze aus einer ersten Flachseite des Flachrohres ausgeformt, während die Stege aus der zweiten, d. h. gegenüberliegenden Seite und den Randstreifen des Bandmaterials abgewinkelt werden. Bevorzugt werden zwei Falze nebeneinander angeordnet, welche einen Spalt bilden, in welchem die Stege aufgenommen werden. Dabei können die Stege einlagig oder doppellagig ausgebildet sein - in letzterem Falle weisen sie einen Umschlag auf. Die Stege sind so bemessen, dass zwischen Stegendkante und Innenseite Flachrohr stets etwas Luft besteht, d. h. ein Spalt belassen ist, sodass das Stegmaß keinen Einfluss auf die Rohrbreite nehmen kann. Durch die doppelte Lage des Steges, d. h. Steg mit Umschlag ergeben sich für die Trennwand sechs, sieben oder acht Lagen, wodurch eine hohe Eigenstabilität erreicht wird.According to a preferred embodiment, the fold or folds are formed from a first flat side of the flat tube, while the webs of the second, d. H. opposite side and the edge strip of the strip material are angled. Preferably, two folds are arranged side by side, which form a gap in which the webs are received. In this case, the webs may be single-layered or double-layered - in the latter case, they have an envelope. The webs are dimensioned so that there is always some air between the edge of the web and the inside of the flat pipe. H. a gap is left so that the ridge size can not influence the pipe width. Due to the double position of the bridge, d. H. Bridge with turn-up result for the partition six, seven or eight layers, whereby a high intrinsic stability is achieved.
Nach einer weiteren bevorzugten Ausführungsform kann zumindest einer der Stege eine endseitige Abkantung aufweisen, welche auf dem Flachrohr aufliegt. Auch dadurch ergibt sich eine Erhöhung der Stabilität.According to another preferred embodiment, at least one of the webs may have an end-side bevel, which rests on the flat tube. This also results in an increase in stability.
Nach einer weiteren bevorzugten Ausgestaltung ist eine Trennwand vorgesehen, welche nur einen Falz und zwei neben dem Falz angeordnete Stege umfasst. Die Stege können ein- oder zweilagig, d. h. mit Umschlag ausgebildet sein, wobei der einlagige Steg wiederum endseitig abgekantet sein kann. Auch dadurch wird ein Flachrohr mit einer hohen Eigenstabilität gegen Verformung erreicht. Die Trennwand kann somit vier, fünf oder sechs Lagen umfassen.According to a further preferred embodiment, a partition wall is provided which comprises only one fold and two webs arranged next to the fold. The webs may be single or double-layered, ie formed with an envelope, wherein the single-layer web can in turn be folded at the ends. This also makes a flat tube with a high inherent stability against deformation reached. The partition may thus comprise four, five or six layers.
Nach einer weiteren bevorzugten Ausführungsform ist eine dreilagige Trennwand vorgesehen, welche lediglich aus einem Falz und einem Steg aufgebaut ist, wobei sowohl der Falz als auch der Steg durch Umformung der Randstreifen des Bandmaterials gebildet sind. Bevorzugt wird der Steg vom Falz umschlossen, sodass sich innerhalb des Falzes eine dichte Verlötung ergibt. Für die Abdichtung der benachbarten Strömungskanäle ist eine Innenplattierung notwendig, damit der Falz auch mit der Innenseite vom Flachrohr verlöten kann. Auch bei dieser Lösung wird der Vorteil erzielt, dass die Steghöhe in Verbindung mit der Blechbanddicke die Breite des Rohres bestimmt und das Stegmaß ohne Einfluss bleibt.According to a further preferred embodiment, a three-layer partition is provided, which is constructed only of a fold and a web, wherein both the fold and the web are formed by forming the edge strips of the strip material. Preferably, the web is enclosed by the fold, so that there is a tight soldering within the fold. For the sealing of the adjacent flow channels an internal plating is necessary so that the fold can also solder to the inside of the flat tube. Also in this solution, the advantage is achieved that the web height in conjunction with the sheet metal strip thickness determines the width of the tube and the ridge size remains without influence.
Nach der Umformung werden die Flachrohre verlötet - hierzu ist vorzugsweise eine Lotplattierung auf:der Seite des Bandmaterials vorgesehen, welche die Außenseite des Flachrohres bildet. Somit verlöten alle Kontaktpaarungen der Trennwand in den Bereichen, wo mindestens eine Seite lotplattiert ist. Bei den meisten Ausführungsbeispielen der Erfindung reicht eine Lotplattierung auf der Außenseite, um eine fluiddichte Verbindung im Trennwandbereich sowohl nach außen als auch zwischen den benachbarten Strömungskanälen zu erzielen. Da in diesem Falle keine Innenplattierung notwendig ist, kann stattdessen eine Schutzplattierung oder eine korrosionshemmende Beschichtung vorgenommen werden, was bei bestimmten Fluiden, insbesondere Kühlmitteln vorteilhaft ist. Die Schutzplattierung ist nicht lötbar.After forming the flat tubes are soldered - this is preferably a Lotplattierung on: the side of the strip material provided, which forms the outside of the flat tube. Thus, all contact mating solder the partition in the areas where at least one side is solder plated. In most embodiments of the invention, solder plating on the outside is sufficient to achieve a fluid tight connection in the partition wall area both outwardly and between the adjacent flow channels. Since no internal plating is necessary in this case, a protective plating or a corrosion-inhibiting coating can instead be made, which is advantageous for certain fluids, in particular coolants. The protective cladding is not solderable.
Bevorzugt besteht das Blechband aus einem Aluminiumwerkstoff oder einer Aluminiumlegierung, welche mit einer handelsüblichen Lotplattierung versehen sein kann, vorzugsweise auf der Außenseite, bedarfsweise auch zusätzlich auf der Innenseite.Preferably, the metal strip is made of an aluminum material or an aluminum alloy, which may be provided with a commercially available Lotplattierung, preferably on the outside, if necessary, also on the inside.
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im Folgenden näher erläutert. Es zeigen
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Fig. 1 ein erfindungsgemäßes Flachrohr mit Trennwand, -
Fig. 1a den Trennwandbereich gemäßFig. 1 in vergrößerter Darstellung -
Fig. 2 ein zweites Ausführungsbeispiel der Erfindung für ein Flachrohr, -
Fig. 2a den Trennwandbereich gemäßFig. 2 in vergrößerter Darstellung, -
Fig. 3 ein drittes Ausführungsbeispiel der Erfindung für ein Flachrohr, -
Fig. 3a den Trennwandbereich gemäßFig. 3 in vergrößerter Darstellung, -
Fig. 4 eine Darstellung des Umformprozesses für das Flachrohr, -
Fig. 5 ein viertes Ausführungsbeispiel der Erfindung für ein Flachrohr, -
Fig. 5a den Trennwandbereich gemäßFig. 5 in vergrößerter Darstellung, -
Fig. 6 ein fünftes Ausführungsbeispiel der Erfindung für ein Flachrohr, -
Fig. 6a den Trennwandbereich gemäßFig. 6 in vergrößerter Darstellung, -
Fig. 7 ein sechstes Ausführungsbeispiel der Erfindung für ein Flachrohr, -
Fig. 7a den Trennwandbereich gemäßFig. 7 in vergrößerter Darstellung, -
Fig. 8 ein siebtes Ausführungsbeispiel der Erfindung für ein Flachrohr, -
Fig. 8a den Trennwandbereich gemäßFig. 8 in vergrößerter Darstellung und -
Fig. 9 einen Rohrrippenblock in einer Draufsicht mit dem erfindungsgemäßen Flachrohr.
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Fig. 1 a flat tube according to the invention with a dividing wall, -
Fig. 1a the partition wall area according toFig. 1 in an enlarged view -
Fig. 2 A second embodiment of the invention for a flat tube, -
Fig. 2a the partition wall area according toFig. 2 in an enlarged view, -
Fig. 3 A third embodiment of the invention for a flat tube, -
Fig. 3a the partition wall area according toFig. 3 in an enlarged view, -
Fig. 4 a representation of the forming process for the flat tube, -
Fig. 5 A fourth embodiment of the invention for a flat tube, -
Fig. 5a the partition wall area according toFig. 5 in an enlarged view, -
Fig. 6 A fifth embodiment of the invention for a flat tube, -
Fig. 6a the partition wall area according toFig. 6 in an enlarged view, -
Fig. 7 A sixth embodiment of the invention for a flat tube, -
Fig. 7a the partition wall area according toFig. 7 in an enlarged view, -
Fig. 8 a seventh embodiment of the invention for a flat tube, -
Fig. 8a the partition wall area according toFig. 8 in an enlarged view and -
Fig. 9 a tube fin block in a plan view with the flat tube according to the invention.
In weiteren nicht dargestellten Verfahrensstufen werden die aufgestellten Bandabschnitte mit den Stegen 43, 44 entsprechend den beiden Pfeilen P1, P2 nach innen gebogen, bis die doppellagigen Stege 43, 44 zwischen die beiden Falze 41, 42 eingreifen und somit entsprechend der
Nach einem bevorzugten Ausführungsbeispiel weist das oben beschriebene erfindungsgemäße Flachrohr folgende Abmessungen auf: Die Breite b des Flachrohres, gegebenenfalls einschließlich der Lotplattierung, liegt in einem Bereich von 0,5 bis 10 mm, vorzugsweise in Bereich von 0,8 bis 4 mm. Die Dicke d des Blechbandes liegt in einem Bereich von 0,08 bis 2 mm, vorzugsweise in einem Bereich von 0,1 bis 0,6 mm. Die Tiefe t des Flachrohres liegt in einem Bereich von 6 bis 100 mm, vorzugsweise in einem Bereich von 10 bis 50 mm.According to a preferred embodiment, the flat tube according to the invention described above has the following dimensions: The width b of the flat tube, optionally including the Lotplattierung, is in a range of 0.5 to 10 mm, preferably in the range of 0.8 to 4 mm. The thickness d of the sheet metal strip is in a range of 0.08 to 2 mm, preferably in a range of 0.1 to 0.6 mm. The depth t of the flat tube is in a range of 6 to 100 mm, preferably in a range of 10 to 50 mm.
In den oben genannten Ausführungsbeispielen wurde jeweils nur eine Trennwand dargestellt, d. h. das Flachrohr ist als Zweikammerrohr ausgebildet. Möglich sind jedoch auch weitere Trennwände, die z. B. durch weitere Falze hergestellt werden können, wie dies auch im eingangs genannten Stand der Technik offenbart ist.In the above embodiments, only one partition wall was shown, ie. H. the flat tube is designed as a two-chamber tube. However, other partition walls are possible, the z. B. can be produced by further folds, as disclosed in the aforementioned prior art.
Claims (13)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007036307A DE102007036307A1 (en) | 2007-07-31 | 2007-07-31 | Flat tube for a heat exchanger |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2020582A2 true EP2020582A2 (en) | 2009-02-04 |
EP2020582A3 EP2020582A3 (en) | 2013-08-28 |
Family
ID=39938351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08013006.5A Withdrawn EP2020582A3 (en) | 2007-07-31 | 2008-07-18 | Flat pipe for a heat exchanger |
Country Status (2)
Country | Link |
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EP (1) | EP2020582A3 (en) |
DE (1) | DE102007036307A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106767093A (en) * | 2016-12-27 | 2017-05-31 | 无锡逸龙铝热科技有限公司 | A kind of straight forming tabletting type radiator flat tube |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2491187B (en) * | 2011-05-27 | 2014-02-26 | Halla Visteon Climate Control | Header for heat exchangers |
CN105021077A (en) * | 2014-05-02 | 2015-11-04 | 泰安鼎鑫冷却器有限公司 | Two-way continuously-folded high-strength radiating tube |
DE102019217307A1 (en) * | 2019-11-08 | 2021-05-12 | Mahle International Gmbh | Heat exchanger |
CN112902728A (en) * | 2021-04-14 | 2021-06-04 | 浙江银轮机械股份有限公司 | Heat exchange tube, heat exchange core and heat exchanger |
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EP0302232A1 (en) | 1987-08-01 | 1989-02-08 | Behr GmbH & Co. | Flat tube for a heat exchanger |
US5875668A (en) | 1996-09-16 | 1999-03-02 | Denso Corporation | Roll forming method for forming flat tube and roll forming apparatus using the same |
DE19857510A1 (en) | 1997-12-23 | 1999-07-01 | Valeo Thermique Moteur Sa | Bent heat exchanger tube used in motor vehicle radiator, made by soldering strip metal |
EP1213555B1 (en) | 1999-09-08 | 2005-05-04 | Zexel Valeo Climate Control Corporation | Tube for heat exchanger, and method of manufacturing the heat exchanger tube |
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DE9318525U1 (en) * | 1993-12-03 | 1995-04-06 | Thermal-Werke, Wärme-, Kälte-, Klimatechnik GmbH, 68766 Hockenheim | Aluminum water / air heat exchanger for motor vehicles |
FR2769359B1 (en) * | 1997-10-02 | 1999-12-24 | Valeo Thermique Moteur Sa | FOLDED TUBE PROVIDED WITH INTERNAL FOLDINGS FORMING PARTITIONS FOR A HEAT EXCHANGER, ESPECIALLY A MOTOR VEHICLE |
JP2000055581A (en) * | 1998-07-31 | 2000-02-25 | Zexel Corp | Heat exchanger |
JP4061761B2 (en) * | 1999-01-26 | 2008-03-19 | 株式会社ティラド | Heat exchanger tubes and heat exchanger cores |
GB2361301B (en) * | 2000-03-16 | 2003-10-08 | Denso Corp | Self clamping groove in a seamed tube |
GB0101697D0 (en) * | 2001-01-23 | 2001-03-07 | Emerson & Renwick Ltd | Heat exchanger tube |
JP4536273B2 (en) * | 2001-01-31 | 2010-09-01 | 株式会社ティラド | Flat tube for heat exchanger and method of manufacturing heat exchanger |
JP2002303496A (en) * | 2001-03-30 | 2002-10-18 | Toyo Radiator Co Ltd | Flat tube for heat exchanger and manufacturing method of heat exchanger |
JP3855853B2 (en) * | 2002-06-05 | 2006-12-13 | 株式会社デンソー | Flat tube and roll forming method and apparatus thereof |
JP2005043026A (en) * | 2003-07-25 | 2005-02-17 | Toyo Radiator Co Ltd | Flat tube for heat exchanger |
US20050092476A1 (en) * | 2003-10-31 | 2005-05-05 | Valeo Inc | Folded tube for a heat exchanger and method of making same |
-
2007
- 2007-07-31 DE DE102007036307A patent/DE102007036307A1/en not_active Withdrawn
-
2008
- 2008-07-18 EP EP08013006.5A patent/EP2020582A3/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0302232A1 (en) | 1987-08-01 | 1989-02-08 | Behr GmbH & Co. | Flat tube for a heat exchanger |
US5875668A (en) | 1996-09-16 | 1999-03-02 | Denso Corporation | Roll forming method for forming flat tube and roll forming apparatus using the same |
DE19857510A1 (en) | 1997-12-23 | 1999-07-01 | Valeo Thermique Moteur Sa | Bent heat exchanger tube used in motor vehicle radiator, made by soldering strip metal |
EP1213555B1 (en) | 1999-09-08 | 2005-05-04 | Zexel Valeo Climate Control Corporation | Tube for heat exchanger, and method of manufacturing the heat exchanger tube |
EP1521050B1 (en) | 1999-09-08 | 2006-12-20 | Zexel Valeo Climate Control Corporation | Tube for heat exchanger |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106767093A (en) * | 2016-12-27 | 2017-05-31 | 无锡逸龙铝热科技有限公司 | A kind of straight forming tabletting type radiator flat tube |
CN106767093B (en) * | 2016-12-27 | 2023-12-05 | 无锡逸龙铝热科技有限公司 | Direct forming tabletting type radiator flat tube |
Also Published As
Publication number | Publication date |
---|---|
DE102007036307A1 (en) | 2009-02-05 |
EP2020582A3 (en) | 2013-08-28 |
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