EP0302232A1 - Flat tube for a heat exchanger - Google Patents

Flat tube for a heat exchanger Download PDF

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Publication number
EP0302232A1
EP0302232A1 EP88110537A EP88110537A EP0302232A1 EP 0302232 A1 EP0302232 A1 EP 0302232A1 EP 88110537 A EP88110537 A EP 88110537A EP 88110537 A EP88110537 A EP 88110537A EP 0302232 A1 EP0302232 A1 EP 0302232A1
Authority
EP
European Patent Office
Prior art keywords
flat tube
metal strip
flat
tube
tube according
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.)
Granted
Application number
EP88110537A
Other languages
German (de)
French (fr)
Other versions
EP0302232B1 (en
Inventor
Dieter Bauer
Werner Helms
Josef Kern
Gebhard Schwarz
Dietmar Zdora
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
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 filed Critical Behr GmbH and Co KG
Publication of EP0302232A1 publication Critical patent/EP0302232A1/en
Application granted granted Critical
Publication of EP0302232B1 publication Critical patent/EP0302232B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28F3/046—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 linear, e.g. corrugations
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • 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
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation

Definitions

  • the invention relates to a flat tube for a heat exchanger of the type specified in the preamble of claim 1.
  • a flat tube is known for example from DE-OS 25 06 434.
  • the flat tubes according to the prior art are welded to the tube seam after the metal strip has been bent. In order to prevent the so-called collapse - this is the reduction in the distance between the narrow sides to one another - a molded support web is provided in the known flat tube.
  • An essential advantage of the flat tube according to the invention is that the tube is initially only produced by bending the metal strip and the sealing of the tube by means of welding is not necessary.
  • the pipes that have not yet been sealed are interspersed with corrugated fins or provided with fins, then the pipe bottoms are attached and the side parts are attached, and only then are the parts mentioned soldered in a single operation.
  • a preferred embodiment of the flat tube according to the invention is that the overlapping loading is richly formed by two parallel, adjacent support webs and as contact surfaces on the adjacent tube flat side of each of the support webs has a right-angled edge, the edges being angled in the opposite direction.
  • This configuration results in two separate chambers in the flat tube, each of which is sealed by corresponding soldering surfaces. To the outside of the tube there is still a common soldering surface on the tube seam, so that each chamber of the flat tube is sealed off from the outside by means of two soldering surfaces.
  • the support web acting as a tie rod has twice the thickness of the normal tube wall thickness, so that a high force load is guaranteed.
  • a variant of this arrangement consists in that the support web and the contact surface are formed by an edge of the metal strip which is angled twice in the same direction and are arranged approximately in the middle of the flat sides.
  • this embodiment variant is somewhat simpler in terms of its design, the support web acting as a tie rod is only designed in a simple tube wall thickness. Compared to the embodiment mentioned in claim 3, a chamber of the flat tube is only sealed against the outside by a soldering surface.
  • the metal strip is solder-plated on the side forming the outside of the tube.
  • the support web and the contact surface is formed by an edge of the metal strip bent twice in the opposite direction and arranged approximately in the middle of the flat sides.
  • the metal strip is solder-plated on the side forming the inside of the tube.
  • a further embodiment of the flat tube according to the invention consists in that at least a part of the metal strip extends substantially into the vicinity of the edge areas within the flat tube, which thus forms a turbulence insert formed in one piece with the flat tube and which has at least one contact surface approximately in the middle of the flat sides has on each flat side of the flat tube.
  • the turbulence insert which also takes over the function of the support web or tie rod, is produced at the same time without any appreciable additional expenditure of material.
  • the part of the Me tallstMails which forms the turbulence insert, is rolled thinner than the part forming the pipe wall.
  • An embodiment has proven to be particularly expedient in which the region forming the tube seam is arranged near one of the lateral ends and, seen in the cross section of the flat tube, the turbulence insert extending inside the flat tube is zigzag, wave or meandering.
  • the lateral arrangement of the pipe seam makes it possible for the turbulence insert to extend into both end regions of the pipe cross section. Due to the zigzag, wave or meandering design, there are several contact points of the turbulence insert between the flat sides, whereby several supporting webs or tie rods are formed.
  • cutouts and / or turbulators for example in the form of angled sheet metal tabs, can be provided in the part of the metal strip forming the turbulence insert.
  • the metal strip is solder-plated on both sides.
  • the metal strip 1 shows a flat tube 2 bent from a metal strip, the cross section of which is determined by two flat sides 3 and 4 and in the lateral end regions by arches 5 and 6.
  • the two edges of the metal strip 1 are brought together on the flat side 4 and in each case angled twice in the same direction in the direction of the flat side 3, so that each edge of the metal strip 1 has a support web 7, 8 and a contact surface 9, 10 on the inside of the flat side 3 forms.
  • the two support webs 7 and 8 lie against one another and thereby form an overlapping area 14.
  • the metal strip 1 is a material that is solder-plated on one side, the solder plating being arranged on the side that forms the outside of the flat tube 2.
  • the flat tube is an extremely flat tube which, for example, consists of a 0.4 mm thick sheet metal strip and has an outer tube dimension of 40 mm x 2 mm.
  • this information is only to be understood as an example; other material thicknesses and other cross-sectional dimensions could also be selected.
  • the flat tube it is of course possible for the flat tube to be passed through an HF welding device after the bending process, as a result of which the tube seam is tacked but not sealed. This measure can be taken in order to give the pipe seam an additional strength in addition to the soldering connection that takes place later, but this should only be necessary in exceptional cases.
  • FIG. 2 shows an enlarged representation of the detail X in FIG. 1. This representation clearly shows three solder seams 11, 12, 13 which are present between the support webs 7 and 8 and between the contact surfaces 9 and 10 and the flat side 3 .
  • FIG. 3 shows the sheet metal strip 1 bent into a flat tube 2, which has the overlapping region 14 approximately in the middle of the flat side 4.
  • An edge of the sheet metal strip 1 is angled starting from the overlapping area in the direction of the flat side 3 and thus forms a support web 15 a further fold of the edge of the sheet metal strip 1 in the same direction results in a contact surface 16 on the flat side 3 of the flat tube 2.
  • the parts of the sheet metal strip 1 lying against one another are soldered to one another.
  • FIG. 4 shows an embodiment variant of the detail Z in FIG. 3, which, however, instead of the contact surface 16 has a contact surface 17 which is angled in the opposite direction.
  • the remaining reference numerals correspond to those in FIG. 3. While preferably a metal strip 1 with a surface plated with solder on the outside of the tube is used in the embodiment according to FIG. 3, the solder plating can only be provided on the inside of the tube or on both sides in the embodiment according to FIG. 4.
  • FIG. 5 shows a cross section through a flat tube, which is configured similarly to the flat tube 2 described for FIG. 1.
  • the same reference numerals as in FIG. 1 are therefore used for matching parts.
  • the metal strip 1 is folded in two places in such a way that additional support webs 18 extend in the longitudinal direction of the tube and bear against the inside of the opposite flat side 4. If the metal strip 1 is a double-sided solder-plated material, the contact surfaces of the additional support webs 18 are also soldered to the inside of the flat tube.
  • Fig. 6 shows a flat tube 19, which consists of a metal strip 20.
  • the metal strip 20 is shaped such that it has an overlapping area 21 near a lateral end 22.
  • the flat tube 19 has flat sides 23 and 24 and a further lateral end 25.
  • the metal strip 20 is angled in the direction of the flat side 23 to form a support web 26, which is adjoined by a contact surface 27 formed on the flat side 23 by angling in the same direction.
  • the metal strip 20 extends from the contact surface 27 in the direction of the lateral end 25 through the interior of the flat tube and thus forms a turbulence insert 28.
  • This turbulence insert 28 essentially comprises two flat sections 29 and 30 in which recesses 31 are provided. Approximately in the middle of the flat sides 23 and 24 of the flat tube, the turbulence insert 28 is configured in a meandering manner between the two flat sections 29 and 30, so that contact surfaces 32 and 33 on the flat sides 23 and 24 and a support web 34 located in between result.
  • the turbine insert In the area adjacent to the lateral end 25, the turbine insert is designed in the same way as between the flat sections 29 and 30, so that there are further contact surfaces 32 and 33 with a support web 34 located between them.
  • Fig. 7 the cross section through a flat tube 19 is shown, which is also formed from a metal strip 20 and the outer contour of which Flat sides 23 and 24 and the lateral regions 25 and the overlap region 21 correspond to those of FIG. 6.
  • the part of the metal strip which is located within the flat tube 19 and which forms the support web, the contact surfaces and the turbulence insert is designed differently.
  • a support web 35 is designed as an arch, the end of which is located away from the overlap area 21 serves as a contact surface 36 on the flat side 23.
  • the metal strip 20 extends as a turbulence insert 37 in a zigzag shape from the contact surface 36 to the vicinity of the lateral end 25.
  • contact surfaces 38 on the flat sides 23 and 24 result which the turbulence insert 37 is soldered to the flat sides 23 and 24.
  • the end of the turbulence insert 37 forms an arcuate support web 35 which is designed in the same way as is also provided near the overlap region.
  • punched openings 39 are provided, through which the turbulence of the pressure fluid is increased.
  • Fig. 8 shows a similar arrangement as Fig. 7, therefore the reference numerals for the same parts match.
  • the difference, however, is that the openings 39 are not formed by punched holes, but by angled sheet metal parts, as a result of which the surface of the turbulence insert which is acted upon by the heat exchanger fluid is larger than that of FIG. 7. Furthermore, turbulence is created by such a configuration the flow further improved.
  • the metal strip can have different thicknesses, which can be taken into account without difficulty when rolling the sheet metal strip.
  • This has the advantage that the sheet metal strip 20 is made thicker over the width that forms the tube wall of the flat tube 19, for example with a wall thickness of 0.3 mm and the part that adjoins the support web 26 or 35 and the Turbulence insert 28 or 37 forms, only has a thickness of 0.1 or 0.15 mm. Because of the mutual contact surfaces of the turbulence insert on the flat sides 23 and 24, the metal strip 20 must be selected from a material soldered on both sides for these embodiments.

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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)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

A flat tube (2) for a heat exchanger consists of a bent metal strip (1) and has a supporting web (7, 8) in its interior between the flat tube sides (3, 4). The metal strip (1) is solder plated on at least one side, and the supporting web (7, 8) is configured such that it has a bearing surface (9, 10) which is soldered on the flat tube side (3) to the tube wall. Heat exchangers having flat tubes (2) of this type are particularly suitable for use in motor vehicles.

Description

Die Erfindung bezieht sich auf ein Flachrohr für einen Wärmetauscher der im Oberbegriff des Anspruchs 1 ange­gebenen Gattung. Ein solches Flachrohr ist beispiels­weise aus der DE-OS 25 06 434 bekannt. Die Flachrohre nach dem Stand der Technik werden nach dem Biegen des Metallstreifens an der Rohrnaht zugeschweißt. Um das sogenannte Einfallen - das ist die Abstandsverringe­rung der Schmalseiten zueinander - zu verhindern, ist bei dem bekannten Flachrohr ein angeformter Stützsteg vorgesehen.The invention relates to a flat tube for a heat exchanger of the type specified in the preamble of claim 1. Such a flat tube is known for example from DE-OS 25 06 434. The flat tubes according to the prior art are welded to the tube seam after the metal strip has been bent. In order to prevent the so-called collapse - this is the reduction in the distance between the narrow sides to one another - a molded support web is provided in the known flat tube.

Bei extrem flachen Rohren kann es jedoch vorkommen, daß aufgrund des Fluiddrucks im Rohr das sogenannte Aufbauchen - das ist die Vergrößerung des Abstandes der Flachseiten zueinander - auftritt. Dies kann zu Undichtheiten infolge von Rissen im Rohr führen. Zur Beseitigung dieser nachteiligen Erscheinung ist in der US-PS 2,488,615 bereits vorgeschlagen worden, das Flachrohr mit einem Einsatz auszustatten, der an bei­den Flachseiten des Rohres angelötet ist. Nachteilig bei der bekannten Anordnung ist jedoch, daß zur Erhö­hung der Stabilität des Flachrohres im Hinblick auf hohe Innendrücke ein zusätzliches Bauteil eingeführt und in einem zusätzlichen Arbeitsgang befestigt werden muß.In the case of extremely flat tubes, however, it can happen that the so-called bulging occurs due to the fluid pressure in the tube - this is the increase in the distance between the flat sides from one another. This can lead to leaks due to cracks in the pipe. For Elimination of this disadvantageous phenomenon has already been proposed in US Pat. No. 2,488,615 to equip the flat tube with an insert which is soldered to both flat sides of the tube. A disadvantage of the known arrangement, however, is that in order to increase the stability of the flat tube with regard to high internal pressures, an additional component has to be introduced and fastened in an additional operation.

Es ist daher die Aufgabe der vorliegenden Erfindung ein Flachrohr gemäß dem Oberbegriff des Anspruchs 1 zu schaffen, das unabhängig von der Rohrtiefe des Flach­rohres hohen Innendrücken und einer großen Druckwech­selbeanspruchung standhält und bei dem keine zusätzli­chen Teile und Arbeitsgänge erforderlich sind.It is therefore the object of the present invention to provide a flat tube according to the preamble of claim 1, which can withstand high internal pressures and a high pressure change stress regardless of the tube depth of the flat tube and in which no additional parts and operations are required.

Diese Aufgabe wird bei einem Flachrohr der genannten Art erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved according to the invention in a flat tube of the type mentioned by the characterizing features of claim 1.

Ein wesentlicher Vorteil des erfindungsgemäßen Flach­rohrs besteht darin, daß das Rohr zunächst nur durch Biegung des Metallstreifens hergestellt wird und das Verschließen der Rohrnaht mittels Schweißung nicht erforderlich ist. Die noch nicht verschlossenen Rohre werden unter Zwischenschaltung von Wellrippen kasset­tiert oder mit Lamellen versehen, anschließend werden die Rohrböden aufgesteckt und die Seitenteile ange­bracht, und erst dann erfolgt die Lötung der genannten Teile in einem einzigen Arbeitsgang.An essential advantage of the flat tube according to the invention is that the tube is initially only produced by bending the metal strip and the sealing of the tube by means of welding is not necessary. The pipes that have not yet been sealed are interspersed with corrugated fins or provided with fins, then the pipe bottoms are attached and the side parts are attached, and only then are the parts mentioned soldered in a single operation.

Eine bevorzugte Ausgestaltung des erfindungsgemäßen Flachrohres besteht darin, daß der überlappende Be­ reich durch zwei prallel verlaufende, aneinanderlie­gende Stützstege gebildet ist und als Anlageflächen an der benachbarten Rohrflachseite jeder der Stützstege einen rechtwinklig abgebogenen Rand aufweist, wobei die Ränder in entgegengesetzter Richtung abgewinkelt sind. Durch diese Ausgestaltug ergeben sich in dem Flachrohr zwei separate Kammern, die jede für sich durch entsprechende Lötflächen abgedichtet sind. Zur Außenseite des Rohres ergibt sich noch eine gemeinsame Lötfläche an der Rohrnaht, so daß jede Kammer des Flachrohres gegen die Außenseite mittels zweier Löt­flächen abgedichtet sind. Außerdem hat der als Zugan­ker wirkende Stützsteg die doppelte Stärke der norma­len Rohrwanddicke, so daß eine hohe Kraftbeanspruchung gewährleistet ist.A preferred embodiment of the flat tube according to the invention is that the overlapping loading is richly formed by two parallel, adjacent support webs and as contact surfaces on the adjacent tube flat side of each of the support webs has a right-angled edge, the edges being angled in the opposite direction. This configuration results in two separate chambers in the flat tube, each of which is sealed by corresponding soldering surfaces. To the outside of the tube there is still a common soldering surface on the tube seam, so that each chamber of the flat tube is sealed off from the outside by means of two soldering surfaces. In addition, the support web acting as a tie rod has twice the thickness of the normal tube wall thickness, so that a high force load is guaranteed.

Eine Ausbildungsvariante dieser Anordnung besteht dar­in, daß der Stützsteg und die Anlagefläche durch einen zweifach in dieselbe Richtung abgewinkelten Rand des Metallstreifens gebildet und annähernd in der Mitte der Flachseiten angeordnet sind. Diese Ausführungsva­riante ist zwar hinsichtlich ihrer Gestaltung etwas einfacher ausgeführt, es ist dabei jedoch der als Zug­anker wirkende Stützsteg nur in einfacher Rohrwanddik­ke ausgeführt. Gegenüber der in Anspruch 3 genannten Ausführung ist dabei eine Kammer des Flachrohres le­diglich durch eine Lötfläche gegen die Außenseite ab­gedichtet. Bei den beiden vorstehend beschriebenen Ausführungsvarianten ist es zweckmäßig, daß der Me­tallstreifen auf der die Rohraußenseite bildenden Sei­te lotplattiert ist.A variant of this arrangement consists in that the support web and the contact surface are formed by an edge of the metal strip which is angled twice in the same direction and are arranged approximately in the middle of the flat sides. Although this embodiment variant is somewhat simpler in terms of its design, the support web acting as a tie rod is only designed in a simple tube wall thickness. Compared to the embodiment mentioned in claim 3, a chamber of the flat tube is only sealed against the outside by a soldering surface. In the two variants described above, it is expedient that the metal strip is solder-plated on the side forming the outside of the tube.

Gemäß einer weiteren vorteilhaften Ausgestaltung des erfindungsgemäßen Flachrohres sind der Stützsteg und die Anlagefläche durch einen zweimal in entgegenge­setzte Richtung abgewinkelten Rand des Metallstreifens gebildet und etwa in der Mitte der Flachseiten ange­ordnet. Für diese Ausführungsform ist es selbstver­ständlich von Vorteil, daß der Metallstreifen auf der die Rohrinnenseite bildenden Seite lotplattiert ist.According to a further advantageous embodiment of the flat tube according to the invention, the support web and the contact surface is formed by an edge of the metal strip bent twice in the opposite direction and arranged approximately in the middle of the flat sides. For this embodiment it is of course advantageous that the metal strip is solder-plated on the side forming the inside of the tube.

Zur weiteren Stabilitätserhöhung des Flachrohres ist es von Vorteil, daß in Längsrichtung des Rohres ver­laufende zusätzliche Stützstege vorgesehen sind, die durch nach innen gerichtete Falzungen des Metallstrei­fens gebildet sind. Durch diese Maßnahme werden die Flachseiten des Flachrohres an mehreren Stellen des Querschnitts gegeneinander abgestützt und die Stütz­stege an der Rohrinnenwand verlötet, so daß diese Aus­führungsform für extrem hohe Beanspruchung sowohl von innen als auch von außen geeignet ist.To further increase the stability of the flat tube, it is advantageous that additional support webs extending in the longitudinal direction of the tube are provided, which are formed by inwardly directed folds of the metal strip. As a result of this measure, the flat sides of the flat tube are supported against one another at several points of the cross section and the support webs are soldered to the inner wall of the tube, so that this embodiment is suitable for extremely high loads both from the inside and from the outside.

Eine weitere Ausgestaltung des erfindungsgemäßen Flachrohres besteht darin, daß mindesten ein Teil des Metallstreifens sich innerhalb des Flachrohres im we­sentlichen bis in die Nähe der Randbereiche erstreckt, der somit eine einstückig mit dem Flachrohr geformte Turbulenzeinlage bildet und der etwa in der Mitte der Flachseiten mindestens eine Anlagefläche an jeder Flachseite des Flachrohres aufweist. Auf diese Weise wird ohne nennenswerten Mehraufwand an Material gleichzeitig die Turbulenzeinlage hergestellt, die die Funktion des Stützsteges bzw. Zugankers mitübernimmt. Bei extrem flachen Rohren ist jedoch darauf zu achten, daß der Durchtrittsquerschnitt des Rohres durch die Turbulenzeinlage nicht zu sehr verringert wird. Aus diesem Grund ist es vorteilhaft, daß der Teil des Me­ tallstreifens, der die Turbulenzeinlage bildet, dünner ausgewalzt ist, als der die Rohrwand bildende Teil. Als besonders zweckmäßig hat sich eine Ausführung er­wiesen, bei der der die Rohrnaht bildende Bereich nahe eines der seitlichen Enden angeordnet ist und im Quer­schnitt des Flachrohres gesehen die sich innerhalb des Flachrohres erstreckende Turbulenzeinlage zickzack-, wellen- oder mäanderförmig ausgebildet ist.A further embodiment of the flat tube according to the invention consists in that at least a part of the metal strip extends substantially into the vicinity of the edge areas within the flat tube, which thus forms a turbulence insert formed in one piece with the flat tube and which has at least one contact surface approximately in the middle of the flat sides has on each flat side of the flat tube. In this way, the turbulence insert, which also takes over the function of the support web or tie rod, is produced at the same time without any appreciable additional expenditure of material. In the case of extremely flat pipes, however, care must be taken that the cross-section of the pipe through the turbulence insert is not reduced too much. For this reason, it is advantageous that the part of the Me tallstreifens, which forms the turbulence insert, is rolled thinner than the part forming the pipe wall. An embodiment has proven to be particularly expedient in which the region forming the tube seam is arranged near one of the lateral ends and, seen in the cross section of the flat tube, the turbulence insert extending inside the flat tube is zigzag, wave or meandering.

Durch die seitliche Anordnung der Rohrnaht ist es mög­lich, daß sich die Turbulenzeinlage bis in beide End­bereiche des Rohrquerschnitts erstreckt. Durch die zickzack-, wellen- oder mäanderförmige Gestaltung er­geben sich mehrere Anlagepunkte der Turbulenzeinlage zwischen den Flachseiten, wodurch mehrere Sützstege bzw. Zuganker gebildet werden. Zur Erzeugung der Tur­bulenz können in dem die Turbulenzeinlage bildenden Teil des Metallstreifens Aussparungen und/oder Turbu­latoren, beispielsweise in Form von abgewinkelten Blechlappen vorgesehen sein. Für die Ausführungsformen gemäß den Ansprüchen 7 und 8 ist es besonders vorteil­haft, daß der Metallstreifen beidseitig lotplattiert ist.The lateral arrangement of the pipe seam makes it possible for the turbulence insert to extend into both end regions of the pipe cross section. Due to the zigzag, wave or meandering design, there are several contact points of the turbulence insert between the flat sides, whereby several supporting webs or tie rods are formed. To generate the turbulence, cutouts and / or turbulators, for example in the form of angled sheet metal tabs, can be provided in the part of the metal strip forming the turbulence insert. For the embodiments according to claims 7 and 8, it is particularly advantageous that the metal strip is solder-plated on both sides.

Einige Ausführungsbeispiele des erfindungsgemäßen Flachrohres sind nachstehend anhand der Zeichnung nä­her erläutert.Some embodiments of the flat tube according to the invention are explained in more detail below with reference to the drawing.

In der Zeichnung zeigt:

  • Fig. 1 Einen Schnitt quer zur Längsachse eines Flachrohres,
  • Fig. 2 eine vergrößerte Darstellung der Einzel-­Einzelheit X in Fig. 1,
  • Fig. 3 eine Ausführungsvariante zu Fig. 1 mit nur einseitig nach innen gebogenem Me­tallstreifen,
  • Fig. 4 eine Ausführungsvariante der Einzelheit Z in Fig. 3,
  • Fig. 5 eine Ausführungsvariante zu Fig. 1 mit zusätzlichen Stützstegen,
  • Fig. 6 einen Querschnitt durch ein Flachrohr mit Turbulenzeinlage,
  • Fig. 7 und 8 weitere Ausführungsvarianten zu Fig. 6.
The drawing shows:
  • 1 shows a section transverse to the longitudinal axis of a flat tube,
  • 2 is an enlarged view of the detail X in Fig. 1,
  • 3 shows a variant of FIG. 1 with a metal strip bent inwards on only one side,
  • 4 shows an embodiment variant of the detail Z in FIG. 3,
  • 5 shows an embodiment variant of FIG. 1 with additional support webs,
  • 6 shows a cross section through a flat tube with turbulence insert,
  • 7 and 8 further variants of Fig. 6th

In Fig. 1 ist ein aus einem Metallstreifen gebogenes Flachrohr 2 dargestellt, dessen Querschnitt durch zwei flache Seiten 3 und 4 und in den seitlichen Endberei­chen durch Bögen 5 und 6 bestimmt ist. Die beiden Rän­der des Metallstreifens 1 sind auf der Flachseite 4 zusammengeführt und in Richtung auf die Flachseite 3 jweils doppelt in dieselbe Richtung abgewinkelt, so daß jeder Rand des Metallstreifens 1 einen Stützsteg 7, 8 und eine Anlagefläche 9, 10 an der Innenseite der Flachseite 3 bildet. Die beiden Stützstege 7 und 8 liegen aneinander und bilden dadurch einen überlappen­den Bereich 14. Bei dem Metallstreifen 1 handelt es sich um ein einseitig lotplattiertes Material, wobei die Lotplattierung auf der Seite angeordnet ist, die die Außenseite des Flachrohres 2 bildet.1 shows a flat tube 2 bent from a metal strip, the cross section of which is determined by two flat sides 3 and 4 and in the lateral end regions by arches 5 and 6. The two edges of the metal strip 1 are brought together on the flat side 4 and in each case angled twice in the same direction in the direction of the flat side 3, so that each edge of the metal strip 1 has a support web 7, 8 and a contact surface 9, 10 on the inside of the flat side 3 forms. The two support webs 7 and 8 lie against one another and thereby form an overlapping area 14. The metal strip 1 is a material that is solder-plated on one side, the solder plating being arranged on the side that forms the outside of the flat tube 2.

Beim Löten des Wärmetauschers werden somit die Flächen der aneinanderliegenden Stützstege 7 und 8 sowie die Anlageflächen 9 und 10 an der Flachseite 3 des Flach­rohres 2 verlötet.When the heat exchanger is soldered, the surfaces of the abutting support webs 7 and 8 and the contact surfaces 9 and 10 on the flat side 3 of the flat tube 2 are thus soldered.

Wie aus dieser Darstellung zu sehen ist, handelt es sich dabei um ein extrem flaches Rohr, das beispiels­weise aus einem 0,4 mm dicken Blechstreifen besteht und ein Rohraußenmaß von 40 mm x 2 mm besitzt. Selbst­verständlich ist diese Angabe nur als Beispiel zu ver­stehen, es könnten auch andere Materialstärken und an­dere Querschnittsdimensionen gewählt werden. Es ist selbstverständlich möglich, daß das Flachrohr nach dem Biegevorgang durch ein HF-Schweißgerät geführt wird, wodurch die Rohrnaht geheftet, jedoch nicht dichtend verschlossen wird. Diese Maßnahme kann getroffen wer­den, um der Rohrnaht außer der später erfolgenden Löt­verbindung eine zusätzliche Festigkeit zu verleihen, was jedoch nur in Ausnahmefällen erforderlich sein dürfte.As can be seen from this illustration, it is an extremely flat tube which, for example, consists of a 0.4 mm thick sheet metal strip and has an outer tube dimension of 40 mm x 2 mm. Of course, this information is only to be understood as an example; other material thicknesses and other cross-sectional dimensions could also be selected. It is of course possible for the flat tube to be passed through an HF welding device after the bending process, as a result of which the tube seam is tacked but not sealed. This measure can be taken in order to give the pipe seam an additional strength in addition to the soldering connection that takes place later, but this should only be necessary in exceptional cases.

Fig. 2 zeigt eine vergrößerte Darstellung der Einzel­heit X in Fig. 1. Aus dieser Darstellung sind deutlich drei Lötnähte 11, 12, 13 ersichtlich, die zwischen den Stützstegen 7 und 8 sowie jeweils zwischen den Anla­geflächen 9 und 10 und der Flachseite 3 vorhanden sind.FIG. 2 shows an enlarged representation of the detail X in FIG. 1. This representation clearly shows three solder seams 11, 12, 13 which are present between the support webs 7 and 8 and between the contact surfaces 9 and 10 and the flat side 3 .

In Fig. 3 ist der zu einem Flachrohr 2 gebogene Blech­streifen 1 gezeigt, der etwa in der Mitte der Flach­seite 4 den überlappenden Bereich 14 aufweist. Ein Rand des Blechstreifens 1 ist ausgehend von dem über­lappenden Bereich in Richtung auf die Flachseite 3 ab­gewinkelt und bildet damit einen Stützsteg 15. Durch einen weiteren Umbug des Randes des Blechstreifens 1 in dieselbe Richtung ergibt sich eine Anlagefläche 16 an der Flachseite 3 des Flachrohres 2. Im überlappen­den Bereich 14 und an der Anlagefläche 16 sind jeweils die aneinanderliegenden Teile des Blechstreifens 1 miteinander verlötet.3 shows the sheet metal strip 1 bent into a flat tube 2, which has the overlapping region 14 approximately in the middle of the flat side 4. An edge of the sheet metal strip 1 is angled starting from the overlapping area in the direction of the flat side 3 and thus forms a support web 15 a further fold of the edge of the sheet metal strip 1 in the same direction results in a contact surface 16 on the flat side 3 of the flat tube 2. In the overlapping area 14 and on the contact surface 16, the parts of the sheet metal strip 1 lying against one another are soldered to one another.

In Fig. 4 ist eine Ausführungsvariante der Einzelheit Z in Fig. 3 dargestellt, die jedoch anstelle der Anla­gefläche 16 eine in entgegengesetzter Richtung abge­winkelte Anlagefläche 17 aufweist. Die übrigen Bezugs­zeichen stimmen mit denjenigen in Fig. 3 überein. Wäh rend bei der Ausführungsform gemäß Fig. 3 vorzugsweise ein Metallstreifen 1 mit auf der Außenseite des Rohres lotplattierter Oberfläche zur Anwendung kommt, kann dagegen bei der Ausführungsform gemäß Fig. 4 die Lot­plattierung nur auf der Rohrinnenseite oder beidseitig vorgesehen sein.FIG. 4 shows an embodiment variant of the detail Z in FIG. 3, which, however, instead of the contact surface 16 has a contact surface 17 which is angled in the opposite direction. The remaining reference numerals correspond to those in FIG. 3. While preferably a metal strip 1 with a surface plated with solder on the outside of the tube is used in the embodiment according to FIG. 3, the solder plating can only be provided on the inside of the tube or on both sides in the embodiment according to FIG. 4.

Fig. 5 zeigt einen Querschnitt durch ein Flachrohr, das ähnlich dem zur Fig. 1 beschriebenen Flachrohr 2 ausgestaltet ist. Für übereinstimmende Teile sind da­her die gleichen Bezugszeichen wie in Fig. 1 einge­setzt. Auf der Flachseite 3 des Flachrohres 2 ist das Metallband 1 an zwei Stellen derart gefalzt, daß sich in Längsrichtung des Rohres verlaufende zusätzliche Stützstege 18 ergeben, die an der Innenseite der ge­genüberliegenden Flachseite 4 anliegen. Sofern es sich bei dem Metallstreifen 1 um ein doppelseitig lotplat­tiertes Material handelt, werden auch die Anlageflä­chen der zusätzlichen Stützstege 18 mit der Innenseite des Flachrohres verlötet.FIG. 5 shows a cross section through a flat tube, which is configured similarly to the flat tube 2 described for FIG. 1. The same reference numerals as in FIG. 1 are therefore used for matching parts. On the flat side 3 of the flat tube 2, the metal strip 1 is folded in two places in such a way that additional support webs 18 extend in the longitudinal direction of the tube and bear against the inside of the opposite flat side 4. If the metal strip 1 is a double-sided solder-plated material, the contact surfaces of the additional support webs 18 are also soldered to the inside of the flat tube.

Fig. 6 zeigt ein Flachrohr 19, das aus einem Metall­streifen 20 besteht. Der Metallstreifen 20 ist derart geformt, daß er einen überlappenden Bereich 21 nahe eines seitlichen Endes 22 besitzt. Das Flachrohr 19 weist Flachseiten 23 und 24 sowie ein weiteres seitli­ches Ende 25 auf. In Fortsetzung des überlappenden Be­reichs 21 ist der Metallstreifen 20 in Richtung auf die Flachseite 23 abgewinkelt zu einem Stützsteg 26 geformt, an dem sich eine durch Abwinklung in der gleichen Richtung entstandene Anlagefläche 27 an der Flachseite 23 anschließt.Fig. 6 shows a flat tube 19, which consists of a metal strip 20. The metal strip 20 is shaped such that it has an overlapping area 21 near a lateral end 22. The flat tube 19 has flat sides 23 and 24 and a further lateral end 25. In continuation of the overlapping area 21, the metal strip 20 is angled in the direction of the flat side 23 to form a support web 26, which is adjoined by a contact surface 27 formed on the flat side 23 by angling in the same direction.

Von der Anlagefläche 27 erstreckt sich der Metall­streifen 20 in Richtung auf das seitliche Ende 25 durch den Innenraum des Flachrohres und bildet somit eine Turbulenzeinlage 28. Diese Turbulenzeinlage 28 umfaßt im wesentlichen zwei ebene Abschnitte 29 und 30 in denen Aussparungen 31 vorgesehen sind. Etwa in der Mitte der Flachseiten 23 und 24 des Flachrohres ist zwischen den beiden ebenen Abschnitten 29 und 30 die Turbulenzeinlage 28 mäanderförmig ausgestaltet, so daß sich Anlageflächen 32 und 33 an den Flachseiten 23 und 24 und ein dazwischen befindlicher Stützsteg 34 erge­ben.The metal strip 20 extends from the contact surface 27 in the direction of the lateral end 25 through the interior of the flat tube and thus forms a turbulence insert 28. This turbulence insert 28 essentially comprises two flat sections 29 and 30 in which recesses 31 are provided. Approximately in the middle of the flat sides 23 and 24 of the flat tube, the turbulence insert 28 is configured in a meandering manner between the two flat sections 29 and 30, so that contact surfaces 32 and 33 on the flat sides 23 and 24 and a support web 34 located in between result.

In dem dem seitlichen Ende 25 benachbarten Bereich ist die Turbuenzeinlage in gleicher Weise ausgestaltet wie zwischen den ebenen Abschnitten 29 und 30, so daß sich auch dort weitere Anlageflächen 32 und 33 mit einem dazwischenbefindlichen Stützsteg 34 ergeben.In the area adjacent to the lateral end 25, the turbine insert is designed in the same way as between the flat sections 29 and 30, so that there are further contact surfaces 32 and 33 with a support web 34 located between them.

In Fig. 7 ist der Querschnitt durch ein Flachrohr 19 gezeigt, das ebenfalls aus einem Metallstreifen 20 ge­formt ist und dessen äußere Kontur bezüglich der Flachseiten 23 und 24 sowie der seitlichen Bereiche 25 und der Überlappungsbereich 21 demjenigen der Fig. 6 entspricht. Anders gestaltet ist jedoch der Teil des Metallstreifens, der sich innerhalb des Flachrohres 19 befindet und der den Stützsteg, die Anlageflächen und die Turbulenzeinlage bildet. Weiterführend von dem Überlappungsbereich 21 ist ein Stützsteg 35 als Bogen ausgeführt, dessen dem Überlappungsbereich 21 entfernt liegendes Ende als Anlagefläche 36 an der Flachseite 23 dient.In Fig. 7 the cross section through a flat tube 19 is shown, which is also formed from a metal strip 20 and the outer contour of which Flat sides 23 and 24 and the lateral regions 25 and the overlap region 21 correspond to those of FIG. 6. However, the part of the metal strip which is located within the flat tube 19 and which forms the support web, the contact surfaces and the turbulence insert is designed differently. Continuing from the overlap area 21, a support web 35 is designed as an arch, the end of which is located away from the overlap area 21 serves as a contact surface 36 on the flat side 23.

Von der Anlagefläche 36 erstreckt sich das Metallband 20 als Turbulenzeinlage 37 in Zickzackform bis in die Nähe des seitlichen Endes 25. An den Punkten, an denen die Form der Turbulenzeinlage 27 eine Richtungsände­rung erfährt, ergeben sich Anlageflächen 38 an den Flachseiten 23 und 24, an denen die Turbulenzeinlage 37 mit den Flachseiten 23 und 24 verlötet wird. Das Ende der Turbulenzeinlage 37 bildet ein in gleicher Weise ausgebildeter bogenförmiger Stützsteg 35, wie er auch nahe des Überlappungsbereiches vorgesehen ist. In den Abschnitten der Turbulenzeinlage 37, die sich zwi­schen den Anlageflächen 38 befinden, sind ausgestanzte Öffnungen 39 vorgesehen, durch die die Turbulenz des Druckfluids erhöht wird.The metal strip 20 extends as a turbulence insert 37 in a zigzag shape from the contact surface 36 to the vicinity of the lateral end 25. At the points at which the shape of the turbulence insert 27 changes direction, contact surfaces 38 on the flat sides 23 and 24 result which the turbulence insert 37 is soldered to the flat sides 23 and 24. The end of the turbulence insert 37 forms an arcuate support web 35 which is designed in the same way as is also provided near the overlap region. In the sections of the turbulence insert 37, which are located between the contact surfaces 38, punched openings 39 are provided, through which the turbulence of the pressure fluid is increased.

Fig. 8 zeigt eine ähnliche Anordnung wie Fig. 7, es stimmen daher die Bezugszeichen für gleiche Teile überein. Unterschiedlich ist jedoch, daß die Öffnungen 39 nicht durch ausgestanzte Löcher gebildet werden, sondern durch abgewinkelte Blechteile, wodurch die vom Wärmetauscherfluid beaufschlagte Oberfläche der Turbu­lenzeinlage größer als diejenige der Fig. 7 ist. Fer­ner wird durch eine solche Ausgestaltung die Turbulenz der Strömung weiter verbessert.Fig. 8 shows a similar arrangement as Fig. 7, therefore the reference numerals for the same parts match. The difference, however, is that the openings 39 are not formed by punched holes, but by angled sheet metal parts, as a result of which the surface of the turbulence insert which is acted upon by the heat exchanger fluid is larger than that of FIG. 7. Furthermore, turbulence is created by such a configuration the flow further improved.

Bei den Ausführungsformen gemäß Fig. 6 bis 8 kann der Metallstreifen unterschiedliche Dicken aufweisen, was beim Walzen des Blechstreifens ohne Schwierigkeiten berücksichtigt werden kann. Das hat den Vorteil, daß der Blechstreifen 20 über die Breite, die die Rohrwand des Flachrohres 19 bildet, dicker ausgeführt wird, beispielsweise mit einer Wandstärke von 0,3 mm und der Teil, der sich an den Stützsteg 26 bzw. 35 anschließt und die Turbulenzeinlage 28 bzw. 37 bildet, lediglich eine Dicke von 0,1 oder 0,15 mm aufweist. Aufgrund der wechselseitigen Anlageflächen der Turbulenzeinlage an den Flachseiten 23 und 24 ist für diese Ausführungs­formen der Metallstreifen 20 aus einem beidseitig lot­plattierten Material zu wählen.In the embodiments according to FIGS. 6 to 8, the metal strip can have different thicknesses, which can be taken into account without difficulty when rolling the sheet metal strip. This has the advantage that the sheet metal strip 20 is made thicker over the width that forms the tube wall of the flat tube 19, for example with a wall thickness of 0.3 mm and the part that adjoins the support web 26 or 35 and the Turbulence insert 28 or 37 forms, only has a thickness of 0.1 or 0.15 mm. Because of the mutual contact surfaces of the turbulence insert on the flat sides 23 and 24, the metal strip 20 must be selected from a material soldered on both sides for these embodiments.

Claims (12)

1. Flachrohr für einen Wärmetauscher, das aus einem gebogenen Metallstreifen (1, 20) besteht, der an mindestens einer die Rohrnaht bildenden Stelle ei­nen überlappenden Bereich (14, 21) aufweist, wobei im Rohrinneren zwischen den Rohrflachseiten (3, 4, 23, 24) ein sich in Rohrlängsrichtung erstrecken­der Stützsteg (7, 8, 15, 26, 34, 35) angeordnet ist, der durch einen entsprechend abgebogenen Teil des Metallstreifens gebildet ist, dadurch gekennzeichnet, daß der Metallstrei­fen (1) aus einem zumindest einseitig lotplattier­ten Material besteht und der Stützsteg (7, 8, 15, 26, 34, 35) derart gestaltet ist, daß mindestens eine Anlagefläche (9, 10, 16, 17, 27, 32, 33, 36) des Stützsteges mit der anderen Rohrflachseite (3, 4, 23, 24) des Flachrohres (2, 19) gegeben ist, wo­ bei mindestens eine Seite der Anlagefläche von der lotplattierten Oberfläche des Metallstreifens (1, 20) gebildet ist, und daß das Flachrohr (2, 19) so­wohl im überlappenden Bereich (14, 21) als auch an der Anlagefläche (9, 10, 16, 17, 27, 32, 33, 36) gelötet ist.1. Flat tube for a heat exchanger, which consists of a bent metal strip (1, 20) which has an overlapping area (14, 21) at at least one point forming the tube seam, the inside of the tube between the tube flat sides (3, 4, 23, 24) a support web (7, 8, 15, 26, 34, 35) extending in the longitudinal direction of the tube is arranged, which is formed by a correspondingly bent part of the metal strip, characterized in that the metal strip (1) is made of a material which is solder-plated at least on one side there is and the support web (7, 8, 15, 26, 34, 35) is designed such that at least one contact surface (9, 10, 16, 17, 27, 32, 33, 36) of the support web with the other flat tube side (3rd , 4, 23, 24) of the flat tube (2, 19) is given where at least one side of the contact surface is formed by the solder-plated surface of the metal strip (1, 20) and that the flat tube (2, 19) both in the overlapping area (14, 21) and on the contact surface (9, 10, 16, 17, 27, 32, 33, 36) is soldered. 2. Flachrohr nach Anspruch 1, dadurch ge­kennzeichnet, daß der Metallstreifen (1) auf der die Rohraußenseite bildenden Seite lot­plattiert ist.2. Flat tube according to claim 1, characterized in that the metal strip (1) is solder-plated on the side forming the tube outside. 3. Flachrohr nach Anspruch 2, dadurch ge­kennzeichnet, daß der überlappende Bereich (14) durch zwei parallel verlaufende, an­einanderliegende Stützstege (7, 8) gebildet ist und als Anlageflächen (9, 10) an der benachbarten Rohr­flachseite (3) jeder der Stützstege (7, 8) einen rechtwinklig abgebogenen Rand aufweist, wobei die Ränder in entgegengesetzter Richtung abgewinkelt sind.3. Flat tube according to claim 2, characterized in that the overlapping area (14) is formed by two parallel, adjacent support webs (7, 8) and as contact surfaces (9, 10) on the adjacent flat tube side (3) of each of the support webs ( 7, 8) has a right-angled edge, the edges being angled in the opposite direction. 4. Flachrohr nach Anspruch 2, dadurch ge­kennzeichnet, daß der Stützsteg (15) und die Anlagefläche (16) durch einen zweifach in dieselbe Richtung abgewinkelten Rand des Metall­streifens (1) gebildet und annähernd in der Mitte der Flachseiten (3, 4) angeordnet sind.4. Flat tube according to claim 2, characterized in that the supporting web (15) and the contact surface (16) are formed by a double angled edge in the same direction of the metal strip (1) and are arranged approximately in the middle of the flat sides (3, 4) . 5. Flachrohr nach Anspruch 1, dadurch ge­kennzeichnet, daß der Metallstreifen (1) auf der die Rohrinnenseite bildenden Seite lot­plattiert ist.5. Flat tube according to claim 1, characterized in that the metal strip (1) is solder-plated on the side forming the inside of the tube. 6. Flachrohr nach Anspruch 5, dadurch ge­kennzeichnet, daß der Stützsteg (15) und die Anlagefläche (17) durch einen zweimal, je­doch in entgegengesetzte Richtungen abgewinkelten Rand des Metallstreifens (1) gebildet und etwa in der Mitte der Flachseiten (3, 4) angeordnet sind.6. Flat tube according to claim 5, characterized in that the support web (15) and the contact surface (17) by a twice, but in opposite directions angled edge of the metal strip (1) and approximately in the middle of the flat sides (3, 4) are arranged. 7. Flachrohr nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in Längsrichtung des Rohres (2) verlaufende zusätz­liche Stützstege (18) vorgesehen sind, die durch nach innen gerichtete Falzungen des Blechstreifens (1) gebildet sind.7. Flat tube according to one of the preceding claims, characterized in that in the longitudinal direction of the tube (2) extending additional support webs (18) are provided, which are formed by inwardly directed folds of the sheet metal strip (1). 8. Flachrohr nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mindestens ein Teil des Metallstreifens (20) sich innerhalb des Flachrohres (19) im wesentlichen bis in die Nähe der Randbereiche (22, 25) erstreckt, der somit eine einstückig mit dem Flachrohr geform­te Turbulenzeinlage (28, 37) bildet, und der etwa in der Mitte der Flachseiten (23, 24) mindestens eine Anlagefläche (32, 33, 38) an jeder Flachseite (23, 24) des Flachrohres aufweist.8. Flat tube according to one of the preceding claims, characterized in that at least a part of the metal strip (20) extends within the flat tube (19) substantially up to the vicinity of the edge regions (22, 25), which is thus integral with the flat tube formed turbulence insert (28, 37), and which has approximately in the middle of the flat sides (23, 24) at least one contact surface (32, 33, 38) on each flat side (23, 24) of the flat tube. 9. Flachrohr nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß der Metall­streifen (20) beidseitig lotplattiert ist.9. Flat tube according to claim 7 or 8, characterized in that the metal strip (20) is solder-plated on both sides. 10. Flachrohr nach Anspruch 8, dadurch ge­kennzeichnet, daß der die Rohrnaht bildende überlappende Bereich (21) nahe eines der seitlichen Enden (22) angeordnet ist und - im Quer­schnitt des Flachrohres (19) gesehen - die sich in­nerhalb des Flachrohres erstreckende Turbulenzein­lage (28, 37) zickzack-, wellen- oder mäanderförmig ausgebildet ist.10. Flat tube according to claim 8, characterized in that the overlapping region forming the tube seam (21) is arranged near one of the lateral ends (22) and - seen in cross section of the flat tube (19) - the turbulence insert (28 , 37) is zigzag, wave or meandering. 11. Flachrohr nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß der Teil des Metallstreifens (20), der die Turbu­lenzeinlage (28, 37) bildet, dünner ausgewalzt ist, als der die Rohrwand bildende Teil.11. Flat tube according to one of claims 8 to 10, characterized in that the part of the metal strip (20) which forms the turbulence insert (28, 37) is rolled thinner than the part forming the tube wall. 12. Flachrohr nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, daß der die Turbulenzeinlage ( 28, 37) bildende Teil des Metallstreifens (20) mit Aussparungen (31, 39) und/oder Turbulatoren (40) versehen ist.12. Flat tube according to one of claims 8 to 11, characterized in that the part of the metal strip (20) forming the turbulence insert (28, 37) is provided with cutouts (31, 39) and / or turbulators (40).
EP88110537A 1987-08-01 1988-07-01 Flat tube for a heat exchanger Expired - Lifetime EP0302232B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3725602A DE3725602A1 (en) 1987-08-01 1987-08-01 FLAT TUBE FOR A HEAT EXCHANGER
DE3725602 1987-08-01

Publications (2)

Publication Number Publication Date
EP0302232A1 true EP0302232A1 (en) 1989-02-08
EP0302232B1 EP0302232B1 (en) 1991-04-10

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Family Applications (1)

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EP88110537A Expired - Lifetime EP0302232B1 (en) 1987-08-01 1988-07-01 Flat tube for a heat exchanger

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EP (1) EP0302232B1 (en)
DE (2) DE3725602A1 (en)
ES (1) ES2021414B3 (en)

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FR2735853A1 (en) * 1995-06-22 1996-12-27 Valeo Thermique Moteur Sa FLAT TUBE FOR HEAT EXCHANGER
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WO1997002918A1 (en) * 1995-07-13 1997-01-30 T & N Technology Limited Forming heat exchangers
DE19548495C2 (en) * 1995-12-22 2000-04-20 Valeo Klimatech Gmbh & Co Kg Heat exchanger block for heat exchangers for motor vehicles and method for the production thereof
DE19548495A1 (en) * 1995-12-22 1997-06-26 Valeo Klimatech Gmbh & Co Kg Heat exchanger block and method of its manufacture
EP0811820A1 (en) * 1996-06-05 1997-12-10 Valeo Thermique Moteur S.A. Flat tube with median spacer for heat exchanger
FR2749648A1 (en) * 1996-06-05 1997-12-12 Valeo Thermique Moteur Sa FLAT TUBE WITH MEDIAN SPACER FOR HEAT EXCHANGER
FR2750485A1 (en) * 1996-06-28 1998-01-02 Valeo Thermique Moteur Sa Automobile radiator manifold connection tubes
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FR2756371A1 (en) 1996-11-25 1998-05-29 Valeo Thermique Moteur Sa Heat exchanger multiple channel flat tube
FR2757258A1 (en) * 1996-12-12 1998-06-19 Valeo Equip Electr Moteur Flat multi=channel tube for heat exchanger
FR2765817A1 (en) * 1997-07-11 1999-01-15 Valeo Thermique Moteur Sa FOLDED TUBE FOR A HEAT EXCHANGER, ESPECIALLY A MOTOR VEHICLE
WO1999002935A1 (en) * 1997-07-11 1999-01-21 Valeo Thermique Moteur Folded tube for heat-exchanger, in particular for motor vehicle
FR2769359A1 (en) 1997-10-02 1999-04-09 Valeo Thermique Moteur Sa Heat exchanger tube with inner partitions
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DE19920102B4 (en) * 1999-05-03 2009-01-02 Behr Gmbh & Co. Kg Multi-chamber tube and heat exchanger arrangement for a motor vehicle
WO2001018472A1 (en) * 1999-09-08 2001-03-15 Zexel Valeo Climate Control Corporation Heat exchanger, tube for heat exchanger, and method of manufacturing the heat exchanger and the tube
EP1089047A3 (en) * 1999-09-29 2001-05-09 Valeo Inc. Tube for heat exchanger
WO2002018862A1 (en) * 2000-04-14 2002-03-07 Llanelli Radiators Limited Heat exchanger and tube therefor
EP1172623A2 (en) 2000-07-11 2002-01-16 Delphi Technologies, Inc. Heat exchanger and fluid pipe therefor
GB2364770A (en) * 2000-07-11 2002-02-06 Delphi Tech Inc Heat exchanger and fluid pipe therefor
JP2002130971A (en) * 2000-10-24 2002-05-09 Japan Climate Systems Corp Heat-exchanger tube
JP4585682B2 (en) * 2000-10-24 2010-11-24 株式会社日本クライメイトシステムズ Tube for heat exchanger
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EP1225408A2 (en) 2001-01-23 2002-07-24 Emerson & Renwick Ltd Heat exchanger tube
EP1225408A3 (en) * 2001-01-23 2002-10-09 Emerson & Renwick Ltd Heat exchanger tube
FR2823840A1 (en) * 2001-04-20 2002-10-25 Valeo Thermique Moteur Sa Heat exchanger folded tube is obtained by folding metal strip over itself to define two channels separated by partition to form transverse member created by strip folded edges
WO2002086408A1 (en) * 2001-04-20 2002-10-31 Valeo Thermique Moteur Folded tube for a heat exchanger and method for the production thereof
JP2005510688A (en) * 2001-11-26 2005-04-21 ヴァレオ クリマチザション Tube profile for heat exchanger
WO2003060412A3 (en) * 2002-01-17 2003-12-24 Behr Gmbh & Co Welded multi-chamber tube
JP2005515391A (en) * 2002-01-17 2005-05-26 ベール ゲーエムベーハー ウント コー カーゲー Welded multi-chamber pipe
WO2003060410A1 (en) * 2002-01-17 2003-07-24 Behr Gmbh & Co. Multi-chamber flat tube
DE10249724B4 (en) * 2002-10-25 2005-03-17 Bayer Industry Services Gmbh & Co. Ohg High-tempering
EP1413844A2 (en) 2002-10-25 2004-04-28 Bayer Aktiengesellschaft Temperature control channels
EP1486749A2 (en) 2003-06-12 2004-12-15 Bayer Industry Services GmbH & Co. OHG Turbulator
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DE10343905A1 (en) * 2003-09-19 2005-06-09 Behr Gmbh & Co. Kg Soldered heat transfer network
WO2005032751A1 (en) * 2003-10-06 2005-04-14 Outokumpu Copper Products Oy Thermal spray application of brazing material for manufacture of heat transfer devices
US7032808B2 (en) 2003-10-06 2006-04-25 Outokumu Oyj Thermal spray application of brazing material for manufacture of heat transfer devices
US6997371B2 (en) 2003-10-06 2006-02-14 Outokumpu Oyj Thermal spray application of brazing material for manufacture of heat transfer devices
EP1630513A2 (en) 2004-08-24 2006-03-01 Behr GmbH & Co. KG Flat tube for heat exchanger, in particular for vehicles and method for producing the same
EP1878989A2 (en) * 2006-07-06 2008-01-16 Behr GmbH & Co. KG Flat pipe for a heat exchanger and heat exchanger with flat pipes
EP1878989A3 (en) * 2006-07-06 2013-02-27 Behr GmbH & Co. KG Flat pipe for a heat exchanger and heat exchanger with flat pipes
US7823630B2 (en) 2007-04-03 2010-11-02 Denso Corporation Tube for heat exchanger and method of manufacturing tube
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DE102007036307A1 (en) 2007-07-31 2009-02-05 Behr Gmbh & Co. Kg Flat tube for a heat exchanger
DE102008007597A1 (en) 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber flat pipe manufacturing method for heat exchanger e.g. exhaust gas heat exchanger, involves attaching bar to edge area of strip through shaping, and forming strip for forming flat pipe, such that profile is closed
CN101936670B (en) * 2009-06-30 2013-05-15 王磊 Heat exchanger with micro-channel, parallel-flow and all-aluminum flat pipe welding structure and application
EP2293001A2 (en) * 2009-07-21 2011-03-09 Behr GmbH & Co. KG Heat exchanger with integrated cold storage
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ITTO20100884A1 (en) * 2010-11-05 2012-05-06 Denso Thermal Systems Spa MULTI-CHANNEL SHEET FOLDED FOR HEAT EXCHANGERS
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JP2018077023A (en) * 2016-11-11 2018-05-17 富士通株式会社 Heat exchanger, information processing device, and method for manufacturing flat tube
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Also Published As

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DE3862350D1 (en) 1991-05-16
EP0302232B1 (en) 1991-04-10
DE3725602A1 (en) 1989-02-09
ES2021414B3 (en) 1991-11-01

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