DE19510283A1 - Flat tube for a soldered heat exchanger and process for its manufacture - Google Patents

Flat tube for a soldered heat exchanger and process for its manufacture

Info

Publication number
DE19510283A1
DE19510283A1 DE1995110283 DE19510283A DE19510283A1 DE 19510283 A1 DE19510283 A1 DE 19510283A1 DE 1995110283 DE1995110283 DE 1995110283 DE 19510283 A DE19510283 A DE 19510283A DE 19510283 A1 DE19510283 A1 DE 19510283A1
Authority
DE
Germany
Prior art keywords
beads
welding
longitudinal
tube
heat exchanger
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.)
Ceased
Application number
DE1995110283
Other languages
German (de)
Inventor
Herbert Dr Ing Damsohn
Horst Dipl Ing Haeffner
Klaus Lorenz
Martin Rilk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
Mahle Behr GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Behr GmbH and Co KG, Mahle Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Priority to DE1995110283 priority Critical patent/DE19510283A1/en
Priority to ES9600135A priority patent/ES2136487B1/en
Priority to GB9605008A priority patent/GB2299037B/en
Priority to FR9603442A priority patent/FR2732101B1/en
Publication of DE19510283A1 publication Critical patent/DE19510283A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/14—Making tubes from double flat material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/151—Making tubes with multiple passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • 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
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding
    • F28F2275/067—Fastening; Joining by welding by laser welding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

A flat tube (10) for a soldered heat exchanger and a method for production thereof are disclosed. The flat tube (10) has a welded longitudinal edge and beads (2) abut one another forming at least one partition extending longitudinally and dividing the internal space into chambers. The beads (2) are welded in their contact positions (8).

Description

Die Erfindung betrifft ein Flachrohr für einen verlöteten Wärmetauscher, insbesondere aus Aluminium, mit einer ver­ schweißten Längskante und mit auf den Längsseiten nach innen geprägten Sicken, die aneinanderliegen und mindestens eine längsverlaufende Trennwand bilden, die den Innenraum in Kam­ mern unterteilt.The invention relates to a flat tube for a soldered Heat exchanger, especially made of aluminum, with a ver welded longitudinal edge and with on the long sides inwards embossed beads that lie against each other and at least one longitudinal partition that form the interior in Kam divided.

Für die Herstellung von verlöteten Wärmetauschern sind Flach­ rohre bekannt (DE 40 26 988 A1), die aus einem wenigstens einseitig lotplattierten Metallstreifen bestehen, der mit pa­ rallel zu seinen Längsseiten verlaufenden Sicken versehen wird, dann zur Rohrform gebogen und an seinen aneinandersto­ ßenden Längskanten verschweißt wird. Solche Flachrohre werden dann zur Bildung der Wärmetauscher mit beiden Enden in Rohr­ böden gesteckt, dadurch mit ihren Längsseiten parallel zuein­ ander ausgerichtet und mit zwischen ihnen liegenden Well­ rippenstreifen versehen, die zur Erhöhung der Wärmeübertra­ gung dienen. Die so zusammengestellten Wärmetauscher werden in der Regel in einem Komplettlötprozeß verlötet, wobei auf den Innenseiten der Rohre eine unkontrollierte Anhäufung von zuviel Lot vor sich gehen kann. Wird eine Flußmittelapplika­ tion verwendet, dann ist es schwierig, das Flußmittel gleich­ mäßig in das Rohr zu bringen und die Feuchtigkeit vor dem Lö­ ten wieder aus dem Rohr zu entfernen. Beide Umstände können dazu führen, daß die Rohre im Bereich der Sicken entweder nicht dicht genug oder nicht fest genug sind, was im Betrieb durch den Innendruck zu unerwünschten Beschädigungen führen kann. Eine unerwünschte Lotanhäufung kann zu einer Durchströ­ mungsstörung führen, was ebenfalls nicht erwünscht ist.Flat are used for the production of soldered heat exchangers Tubes known (DE 40 26 988 A1), which consists of at least one metal strips solder-plated on one side, which with pa Providing beads running parallel to its long sides is then bent into the tube shape and at its abutting longitudinal edges is welded. Such flat tubes will be then to form the heat exchanger with both ends in tube floors inserted, with their long sides parallel to each other aligned and with well between them rib strips provided to increase the heat transfer serve. The heat exchangers assembled in this way will usually soldered in a complete soldering process, being on an uncontrolled accumulation of too much solder can go on. Becomes a flux application  tion used, then it is difficult to equal the flux bring moderate into the tube and the moisture before the Lö to remove from the pipe. Both circumstances can cause the tubes in the bead area either what is in operation is not dense enough or not firm enough lead to undesired damage due to the internal pressure can. An undesired accumulation of solder can lead to a flow lead disorder, which is also not desirable.

Der Erfindung liegt die Aufgabe zugrunde, ein Flachrohr der eingangs genannten Art so auszubilden, daß die geschilderten Nachteile nicht auftreten, so daß unter Verwendung der Flach­ rohre Wärmetauscher auch mit Lötverfahren verbunden werden können, die eine Flußmittelapplikation erforderlich machen.The invention has for its object a flat tube trained in such a way that the described Disadvantages do not occur, so using the flat Pipe heat exchangers can also be connected using soldering processes can, which require flux application.

Diese Aufgabe wird erfindungsgemäß bei einem Flachrohr der eingangs genannten Art dadurch gelöst, daß die Sicken an ih­ rer Berührungsstelle verschweißt sind. Durch diese Maßnahme wird eine Verlötung im Inneren der Rohre überflüssig, und es kann, beispielsweise nach dem Nocolok-Verfahren, an allen an­ deren Verbindungsstellen der Flachrohre, also am Rohrboden oder mit den Wellrippenstreifen, in relativ einfacher Weise eine Flußmittelapplikation mit anschließender Trocknung vor­ genommen werden, ohne daß Schwierigkeiten bei der Zugänglich­ keit der mit Flußmittel zu versehenden Teile oder bei der Trocknung auftreten. Flachrohre gemäß der Erfindung lassen sich daher für die Herstellung von Nocolok-verlöteten Wärme­ tauschern verwenden.This object is achieved with a flat tube type mentioned solved in that the beads on ih are touch welded. By this measure soldering inside the tubes becomes superfluous, and it can, for example, according to the Nocolok process, to everyone their connection points of the flat tubes, i.e. on the tube sheet or with the corrugated rib strips, in a relatively simple way a flux application followed by drying be taken without any difficulties in accessibility speed of the parts to be provided with flux or at Drying occur. Leave flat tubes according to the invention is therefore interested in the production of Nocolok soldered heat use exchangers.

In Weiterbildung der Erfindung kann zur Herstellung der Flachrohre ein Verfahren vorgesehen werden, bei dem zunächst aus einem mindestens auf der späteren Außenseite lotplattier­ ten Metallstreifen Längssicken herausgeprägt werden, die nach dem Biegen des Metallstreifens zur Rohrform und dem Ver­ schweißen der freien Längskanten im Rohrinneren aneinander­ liegen und das dadurch gekennzeichnet ist, daß diese aneinan­ derliegenden Sicken längsverschweißt werden. Dabei kann das Verschweißen partiell mit einem gepulsten Laserstrahl erfol­ gen, der zweckmäßig mit der Rohrschweißmaschine zur Herstel­ lung der Längsnaht mitläuft.In a development of the invention can be used to manufacture the Flat tubes are a method that is initially provided from a solder plating at least on the later outside metal strips longitudinal beads are embossed, which after the bending of the metal strip to the tube shape and the ver welding the free longitudinal edges together inside the pipe lie and that is characterized in that these together the surrounding beads are welded lengthways. It can  Partial welding with a pulsed laser beam gene, the expedient with the pipe welding machine to manufacture along the longitudinal seam.

Es ist aber auch möglich, für das Verschweißen der Sicken ein durchgehendes Verschweißen durch induktives Warmpreßschweißen vorzusehen, das entweder vor dem Verschweißen der Längsnaht oder danach vorgenommen wird.But it is also possible to weld the beads continuous welding by inductive hot pressure welding to be provided either before welding the longitudinal seam or afterwards.

Die Erfindung ist anhand eines Ausführungsbeispieles in der Zeichnung dargestellt und wird im folgenden erläutert. Es zeigen:The invention is based on an embodiment in the Drawing shown and is explained below. It demonstrate:

Fig. 1 die Darstellung eines als Ausgangsmaterial zur Her­ stellung eines Flachrohres dienenden Metallstrei­ fens, der zur Rohrform gebogen wird, Fig. 1 is an illustration of a starting material for the manufacture of a flat tube serving Metallstrei position fen, which is bent to a tubular shape,

Fig. 2 den Metallstreifen der Fig. 1 in Rohrform mit ver­ schweißten Längssicken vor dem Verschweißen der Längsnaht, und Fig. 2 shows the metal strip of Fig. 1 in tubular form with welded longitudinal beads before welding the longitudinal seam, and

Fig. 3 die Teilansicht eines Wärmetauschers, der unter Ver­ wendung von Flachrohren nach Fig. 2 hergestellt ist. Fig. 3 is a partial view of a heat exchanger which is made using flat tubes according to Fig. 2.

Die Fig. 1 läßt erkennen, daß zur Herstellung der neuen Flachrohre ein Metallstreifen (1), insbesondere aus Aluminium vorgesehen wird, der zunächst mit zwei parallel zueinander verlaufenden, nach der gleichen Seite herausgeprägten Längs­ sicken (2) und mit nach derselben Seite wie die Sicken hoch­ gebogenen Längskanten (3a und 3b), versehen ist. Dieser Me­ tallstreifen (1) ist auf seiner flachen und nicht mit den vorstehenden Sicken (2) versehenen Unterseite (4) mit einer AlSi-Plattierung versehen, um später eine Verlötung mit ande­ ren Teilen nach dem Nocolok-Verfahren durchführen zu können. Fig. 1 shows that for the production of the new flat tubes, a metal strip ( 1 ), in particular made of aluminum is provided, the beads first with two parallel to each other, embossed on the same side longitudinal ( 2 ) and with the same side as that Beading high curved longitudinal edges ( 3 a and 3 b), is provided. This metal strip ( 1 ) is on its flat and not provided with the protruding beads ( 2 ) underside ( 4 ) with an AlSi plating in order to be able to carry out soldering to other parts later using the Nocolok process.

Der Metallstreifen (1) wird, wie gestrichelt eingezeichnet ist, dann im Sinn des Pfeiles (6) um seine Mittellinie (5) hochgebogen, so daß seine Längskante (3b′) der Längskante (3a) entgegengerichtet ist. Die auf der Seite der Längskante (3b) liegende Sicke (2) erreicht dann die Lage (2′) und legt sich beim weiteren Biegen im Sinn des Pfeiles (7) an die Sicke (2) an, wie Fig. 2 zeigt. Der nach Fig. 2 bereits zur Rohrform gebogene Metallstreifen (1) wird dann an der Linie (8), an der die Sicken (2) aneinander anliegen, beispielswei­ se durch ein induktives Warmpreßschweißen, verschweißt. An­ schließend wird die Längsnaht (9) zwischen den Längskanten (3a und 3b) mit Hilfe einer Rohrschweißmaschine hergestellt.The metal strip ( 1 ), as shown in dashed lines, is then bent in the direction of the arrow ( 6 ) around its center line ( 5 ) so that its longitudinal edge ( 3 b ') is opposite to the longitudinal edge ( 3 a). The bead ( 2 ) lying on the side of the longitudinal edge ( 3 b) then reaches the position ( 2 ') and lies on the bead ( 2 ) during the further bending in the direction of the arrow ( 7 ), as shown in FIG. 2. The metal strip ( 1 ) which is already bent into a tubular shape according to FIG. 2 is then welded on the line ( 8 ) on which the beads ( 2 ) abut one another, for example by inductive hot pressure welding. At closing the longitudinal seam ( 9 ) between the longitudinal edges ( 3 a and 3 b) is made with the help of a pipe welding machine.

Alternativ ist es auch möglich, die Verschweißung an der Li­ nie (8) durch einen gepulsten Laserstrahl herzustellen, den man beispielsweise mit der Rohrschweißmaschine zur Herstel­ lung der Schweißnaht (9) mitlaufen läßt. Natürlich wäre es auch möglich, die durch das induktive Warmpreßschweißen her­ gestellte Schweißnaht zwischen den Sicken (2) nach der Her­ stellung der Schweißnaht (9) herzustellen.Alternatively, it is also possible to never produce the weld on the Li ( 8 ) by means of a pulsed laser beam, which can be run, for example, with the pipe welding machine to produce the weld seam ( 9 ). Of course, it would also be possible to produce the weld seam produced by the inductive hot-pressure welding between the beads ( 2 ) after the weld seam ( 9 ) has been produced.

Das nach Fig. 2 hergestellte Flachrohr (10) wird nun gemäß Fig. 3 mit mehreren anderen zusammengeschichtet und zwar so, daß die Längsseiten der Flachrohre (10) jeweils parallel zu­ einanderliegen. Das wird dadurch erreicht, daß die Enden der Flachrohre (10) jeweils in Rohrböden (11) eingeschoben wer­ den, die in bekannter Weise anschließend durch einen Sammel­ kasten verschlossen werden. Jeweils zwischen zwei benachbar­ ten Flachrohren (10) wird ein Wellstreifen (12) eingefügt, der beim Ausführungsbeispiel jeweils im Bereich seiner Wel­ lenkämme mit herausgeprägten Lappen (13) versehen ist, die sich zur Lagefixierung des Wellstreifens (12) in den nach in­ nen gedrückten Teil der Sicken (2) der Flachrohre hereinle­ gen. Die für diesen sogenannten Kassettiervorgang verwende­ ten, nach der Erfindung hergestellten Flachrohre (10) zeich­ nen sich dabei dadurch aus, daß sie für die Montage besonders stabil und steif und formschlüssig mit den Wellstreifen (12) verbunden sind.The flat tube ( 10 ) produced according to FIG. 2 is now stacked together according to FIG. 3 with several others, in such a way that the long sides of the flat tubes ( 10 ) are each parallel to one another. This is achieved in that the ends of the flat tubes ( 10 ) are each inserted into tube sheets ( 11 ), who are then closed in a known manner by a collecting box. In each case between two adjacent flat tubes ( 10 ), a corrugated strip ( 12 ) is inserted, which in the exemplary embodiment in each case in the area of its wel combs is provided with embossed rags ( 13 ) which are used to fix the position of the corrugated strip ( 12 ) in the inwardly pressed Part of the beads ( 2 ) of the flat tubes. The flat tubes ( 10 ) used for this so-called cassette process, which are produced according to the invention, are characterized in that they are particularly stable and rigid and form-fitting with the corrugated strips ( 12 ) are connected.

Ist der Kassettiervorgang in der geschilderten Weise beendet, dann kann der so zusammengestellte Wärmetauscher beispiels­ weise im Nocolok-Verfahren verlötet werden. Dies setzt vor­ aus, daß Flußmittel appliziert wird. Es ist aus Fig. 3 aber ohne weiteres zu erkennen, daß dieses Flußmittel in einfacher Weise, z. B. durch Besprühen der Zwischenräume zwischen den Flachrohren (10) aufgebracht werden und in die zu verlötende Spalte zwischen Flachrohren (10) und Rohrboden (11) einer­ seits und zwischen den Wellenkämmen der Wellstreifen (12) und den Längsseiten der Flachrohre (10) andererseits gelangen kann. Das so applizierte Flußmittel wird dann getrocknet, so daß anschließend durch Verbringen des kassettierten Wärmetau­ schers nach Fig. 1 in einen Lötofen die dichte Verlötung stattfinden kann.If the cassette process is ended in the manner described, the heat exchanger assembled in this way can be soldered, for example, in the Nocolok process. This presupposes that flux is applied. It can be easily seen from Fig. 3 that this flux in a simple manner, for. B. by spraying the gaps between the flat tubes ( 10 ) and in the gap to be soldered between flat tubes ( 10 ) and tube sheet ( 11 ) on the one hand and between the wave crests of the corrugated strips ( 12 ) and the long sides of the flat tubes ( 10 ) on the other can reach. The flux applied in this way is then dried, so that tight soldering can then take place by moving the cassette-shaped heat exchanger according to FIG. 1 into a soldering furnace.

Wie ohne weiters deutlich wird, ist es bei diesem Lötvorgang nicht notwendig, in das Innere der Flachrohre (10) Lot- oder Flußmittel einzubringen, das dort zu unerwünschten Lotanhäu­ fungen Anlaß gibt oder zu dem Nachteil führt, daß das Fluß­ mittel nicht gleichmäßig im Rohr verteilt und nicht gründlich getrocknet werden kann. Der neue Wärmetauscher nach Fig. 3 ist daher ein verlöteter Wärmetauscher, für dessen Herstel­ lung aber Flachrohre (10) verwendet werden, die ausschließ­ lich geschweißt sind.As is readily apparent, it is not necessary in this soldering process to bring solder or flux into the interior of the flat tubes ( 10 ), which gives rise to undesired soldering there or leads to the disadvantage that the flux is not uniform in the tube distributed and cannot be dried thoroughly. The new heat exchanger according to FIG. 3 is therefore a soldered heat exchanger, for the manufacture of which, however, flat tubes ( 10 ) are used, which are exclusively welded.

Claims (7)

1. Flachrohr, insbesondere aus Aluminium, für einen verlöteten Wärmetauscher, mit einer verschweißten Längskante und mit an den Längsseiten nach innen geprägten Sicken, die aneinanderliegen und mindestens eine längsverlaufende Trenn­ wand bilden, die den Innenraum in Kammern unterteilt, dadurch gekennzeichnet, daß die Sicken (2) an ihrer Berührungsstelle (8) verschweißt sind.1. Flat tube, in particular aluminum, for a soldered heat exchanger, with a welded longitudinal edge and with embossed beads on the longitudinal sides that lie against each other and form at least one longitudinal dividing wall that divides the interior into chambers, characterized in that the beads ( 2 ) are welded at their point of contact ( 8 ). 2. Verfahren zur Herstellung des Flachrohres nach An­ spruch 1, bei dem zunächst aus einem mindestens auf der spä­ teren Außenseite (4) lotplattiertem Metallstreifen (1) Längs­ sicken (2) herausgeprägt werden, die nach dem Biegen des Me­ tallstreifens zur Rohrform und dem Verschweißen der freien Längskanten (3a, 3b) im Rohrinneren aneinanderliegen, dadurch gekennzeichnet, daß die Sicken (2) längsverschweißt werden.2. Method for producing the flat tube according to claim 1, in which first of all at least on the later outer side ( 4 ) solder-plated metal strip ( 1 ) beads ( 2 ) are embossed, which after bending the metal strip to the tube shape and the Welding of the free longitudinal edges ( 3 a, 3 b) lie against each other in the interior of the tube, characterized in that the beads ( 2 ) are longitudinally welded. 3. Verfahren nach Anspruch 2, gekennzeichnet durch ein partielles Verschweißen der Sicken (2) mit einem gepulsten Laserstrahl.3. The method according to claim 2, characterized by a partial welding of the beads ( 2 ) with a pulsed laser beam. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß der Laserstrahl mit der Rohrschweißmaschine zur Herstel­ lung der Längsnaht mitläuft.4. The method according to claim 3, characterized in that the laser beam with the pipe welding machine to manufacture along the longitudinal seam. 5. Verfahren nach Anspruch 2, gekennzeichnet durch ein durchgehendes Verschweißen mit Hilfe eines induktiven Warm­ preßschweißverfahrens.5. The method according to claim 2, characterized by a continuous welding with the help of an inductive warm pressure welding process. 6. Verfahren nach Anspruch 5, gekennzeichnet dadurch, daß das Verschweißen der Sicken (2) vor der Verschweißung der Längsnaht oder umgekehrt erfolgt. 6. The method according to claim 5, characterized in that the welding of the beads ( 2 ) takes place before the welding of the longitudinal seam or vice versa. 7. Verwendung von Flachrohren nach Anspruch 1 für Wärme­ tauscher, deren parallel zueinander angeordnete Flachrohre (10) in Rohrböden (11) und mit zwischen sich angeordneten Wellrippen (12) im Nocolok-Verfahren verlötet sind.7. Use of flat tubes according to claim 1 for heat exchanger, the parallel flat tubes ( 10 ) in tube sheets ( 11 ) and with corrugated fins ( 12 ) arranged between them are soldered in the Nocolok process.
DE1995110283 1995-03-22 1995-03-22 Flat tube for a soldered heat exchanger and process for its manufacture Ceased DE19510283A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE1995110283 DE19510283A1 (en) 1995-03-22 1995-03-22 Flat tube for a soldered heat exchanger and process for its manufacture
ES9600135A ES2136487B1 (en) 1995-03-22 1996-01-23 FLAT PIPE FOR A WELDED HEAT EXCHANGER FOR INDIRECT WELDING, PROCEDURE FOR ITS MANUFACTURING AND CORRESPONDING USE.
GB9605008A GB2299037B (en) 1995-03-22 1996-03-08 Flat tube for a soldered heat exchanger and a method for its production
FR9603442A FR2732101B1 (en) 1995-03-22 1996-03-20 FLAT TUBE FOR BRAZING ASSEMBLED HEAT EXCHANGER AND MANUFACTURING METHOD AND USE OF SUCH A TUBE

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ES (1) ES2136487B1 (en)
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EP0994320A3 (en) * 1998-10-17 2001-01-24 Arbonia Ag Radiator with at least two stacked flat tubes
EP1089047A3 (en) * 1999-09-29 2001-05-09 Valeo Inc. Tube for heat exchanger
DE10016113A1 (en) * 2000-03-31 2001-10-04 Modine Mfg Co Radiator for motor vehicle comprises block of flat tubes, between which are ribs, ends of tubes being bent around to issue into opposing collection boxes
US6513585B2 (en) 2000-03-31 2003-02-04 Modine Manufacturing Company Header-less vehicle radiator
DE19849449C2 (en) * 1998-10-28 2003-05-28 Hanf Carl Elino Ind Ofenbau Method and system for connecting heat exchanger parts
WO2003060410A1 (en) 2002-01-17 2003-07-24 Behr Gmbh & Co. Multi-chamber flat tube
US6668916B2 (en) 2001-09-25 2003-12-30 Modine Manufacturing Company Flat tube block heat exchanger
DE10226753A1 (en) * 2002-06-14 2004-01-08 Behr Gmbh & Co. heat exchangers
WO2005028986A1 (en) * 2003-09-19 2005-03-31 Behr Gmbh & Co. Kg Soldered heat exchanger network
EP1705446A1 (en) 2005-03-22 2006-09-27 Behr GmbH & Co. KG Tube for a heat exchanger
DE102008031614A1 (en) 2008-07-07 2010-01-14 Behr Gmbh & Co. Kg Heat exchanger, in particular heat exchanger of a motor vehicle, and method for producing a cooling tube of a heat exchanger
DE102009032782A1 (en) * 2009-07-10 2011-01-13 Behr Industry Gmbh & Co. Kg Heat exchanger, in particular for an internal combustion engine
DE102009041406B3 (en) * 2009-09-12 2011-03-10 Thesys Gmbh Heat exchanger for use as evaporator in energy recovery plant of motor vehicle, has smaller flat tube arranged in larger flat tube, where broad sides of walls of larger flat tube lie against each other, when tubes are coaxially arranged
DE102010052621A1 (en) * 2010-11-29 2012-05-31 Benteler Automobiltechnik Gmbh Method for manufacturing heat exchanger in internal combustion engine for automobile cooling applications, involves fixing punctually turbulence elements at heat carrier, and soldering turbulence elements with heat carrier in furnace
CN102636050A (en) * 2012-04-27 2012-08-15 华南理工大学 Compact type flue gas waste heat recovery heat exchanger
EP3564611A1 (en) * 2018-05-04 2019-11-06 Hamilton Sundstrand Corporation Method of fabricating heat exchanger with micro tubes and fins

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JP2001248988A (en) * 2000-03-06 2001-09-14 Mitsubishi Heavy Ind Ltd Heat exchanger
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0994320A3 (en) * 1998-10-17 2001-01-24 Arbonia Ag Radiator with at least two stacked flat tubes
DE19849449C2 (en) * 1998-10-28 2003-05-28 Hanf Carl Elino Ind Ofenbau Method and system for connecting heat exchanger parts
EP1089047A3 (en) * 1999-09-29 2001-05-09 Valeo Inc. Tube for heat exchanger
DE10016113A1 (en) * 2000-03-31 2001-10-04 Modine Mfg Co Radiator for motor vehicle comprises block of flat tubes, between which are ribs, ends of tubes being bent around to issue into opposing collection boxes
US6513585B2 (en) 2000-03-31 2003-02-04 Modine Manufacturing Company Header-less vehicle radiator
US6668916B2 (en) 2001-09-25 2003-12-30 Modine Manufacturing Company Flat tube block heat exchanger
WO2003060410A1 (en) 2002-01-17 2003-07-24 Behr Gmbh & Co. Multi-chamber flat tube
DE10226753A1 (en) * 2002-06-14 2004-01-08 Behr Gmbh & Co. heat exchangers
WO2005028986A1 (en) * 2003-09-19 2005-03-31 Behr Gmbh & Co. Kg Soldered heat exchanger network
EP1705446A1 (en) 2005-03-22 2006-09-27 Behr GmbH & Co. KG Tube for a heat exchanger
DE102008031614A1 (en) 2008-07-07 2010-01-14 Behr Gmbh & Co. Kg Heat exchanger, in particular heat exchanger of a motor vehicle, and method for producing a cooling tube of a heat exchanger
US8991481B2 (en) 2008-07-07 2015-03-31 Behr Gmbh & Co. Kg Heat exchanger for a motor vehicle, and method for manufacturing a cooling tube of a heat exchanger
DE102009032782A1 (en) * 2009-07-10 2011-01-13 Behr Industry Gmbh & Co. Kg Heat exchanger, in particular for an internal combustion engine
EP2273227A3 (en) * 2009-07-10 2014-02-12 Behr Industry GmbH & Co. KG Heat exchanger, in particular for a combustion engine
DE102009041406B3 (en) * 2009-09-12 2011-03-10 Thesys Gmbh Heat exchanger for use as evaporator in energy recovery plant of motor vehicle, has smaller flat tube arranged in larger flat tube, where broad sides of walls of larger flat tube lie against each other, when tubes are coaxially arranged
DE102010052621A1 (en) * 2010-11-29 2012-05-31 Benteler Automobiltechnik Gmbh Method for manufacturing heat exchanger in internal combustion engine for automobile cooling applications, involves fixing punctually turbulence elements at heat carrier, and soldering turbulence elements with heat carrier in furnace
DE102010052621B4 (en) * 2010-11-29 2014-03-13 Benteler Automobiltechnik Gmbh Method for producing a heat exchanger
CN102636050A (en) * 2012-04-27 2012-08-15 华南理工大学 Compact type flue gas waste heat recovery heat exchanger
EP3564611A1 (en) * 2018-05-04 2019-11-06 Hamilton Sundstrand Corporation Method of fabricating heat exchanger with micro tubes and fins

Also Published As

Publication number Publication date
GB2299037B (en) 1997-10-08
FR2732101B1 (en) 1998-02-06
GB9605008D0 (en) 1996-05-08
ES2136487B1 (en) 2000-11-16
ES2136487A1 (en) 1999-11-16
GB2299037A (en) 1996-09-25
FR2732101A1 (en) 1996-09-27

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