EP1832830B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP1832830B1
EP1832830B1 EP07002886A EP07002886A EP1832830B1 EP 1832830 B1 EP1832830 B1 EP 1832830B1 EP 07002886 A EP07002886 A EP 07002886A EP 07002886 A EP07002886 A EP 07002886A EP 1832830 B1 EP1832830 B1 EP 1832830B1
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EP
European Patent Office
Prior art keywords
tube
flat tubes
heat exchanger
tube plate
solder
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.)
Not-in-force
Application number
EP07002886A
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German (de)
French (fr)
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EP1832830A1 (en
Inventor
Joachim Kopp
Oliver Mauch
Thomas Dipl.-Ing. Ruppel
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
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Behr GmbH and Co KG
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Publication date
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1832830A1 publication Critical patent/EP1832830A1/en
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Publication of EP1832830B1 publication Critical patent/EP1832830B1/en
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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
    • 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means
    • 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
    • F28F2275/04—Fastening; Joining by brazing

Definitions

  • the invention relates to a heat exchanger according to the preamble of claim 1.
  • document FR 2 254 771 discloses such a heat exchanger.
  • Known heat exchangers consist of a block of tubes and ribs which are soldered together. From the block are pipe ends of the tubes out, which are used in receiving openings of tube sheets, so-called passages and sealed to the tube sheets. On the tube sheets collecting boxes are placed after the soldering process, which are designed as plastic or as metal boxes.
  • the parts to be soldered together such as pipes, ribs and tube sheets are made of aluminum alloys and are brazed, the solder is preferably applied as a plating on the base material.
  • plating is provided on the tubesheets and on the tubes designed as flat tubes.
  • the arranged between the flat tubes ribs are formed as corrugated ribs and often have no plating for technological reasons.
  • the corrugated ribs solder with their wave crests on the flat sides of the flat tubes and thus produce a good heat-conducting connection.
  • the internal pressures in the flat tubes are different in purpose: with coolant radiators for motor vehicles, the internal pressure, for example, 1.3 to 1.5 bar, with rising tendency. This results in the risk that the flat tubes are "inflated” by the internal pressure, which can lead to leaking pipes.
  • the corrugated fins arranged on both sides of the flat tubes therefore practice a supporting force on the outer sides of the flat tubes. Problems with respect to the internal pressure resistance can arise for the flat tubes where the supporting effect of the corrugated ribs is not given, which is the case, for example, in the vicinity of the ground.
  • the tubesheets have punctiform or linear elevations in the region between adjacent tube ends, which elevations are directed toward the air side of the tubesheet, that is, toward the side of the corrugated ribs.
  • these elevations, at least one between adjacent tubes, as nubs (point-shaped) or beads (linear) may be formed, which are pronounced from the material of the tube sheet to the air side.
  • the embodiments according to the invention have the advantage that the ends of the corrugated fins, which reach up to the tubesheet, have minimal contact with the tubesheet. This ensures that during the soldering process no or little solder flows from the tube sheet to the rib.
  • the solder preferably deposited as a cladding on the tubesheet is required for the soldering of the tubesheet with the flat tubes - with a too low Lot many in the field of tube sheet connection could not achieve Dichtlötung.
  • nubs or beads according to the invention other designs of the tube sheet are conceivable, which prevent a Lotpound from the tube sheet to the rib, z. B. a convex or curved formation of the tube bottom to the air side, so that only a minimal (point or line) contact surface between the tube sheet and corrugated fin results.
  • the inventive design of the tube sheet with air-side pronounced knobs or beads is particularly advantageous for a coolant radiator of a motor vehicle applicable.
  • the shape of the knobs or beads manufacturing technology is relatively simple and can be done without significant additional effort at the same time with the production of the tube sheet, z. B. in the punching punching of the passages for receiving the pipe ends done.
  • Fig. 1 a partially illustrated tube sheet 1 in longitudinal section.
  • the tubesheet is preferably made of an aluminum alloy and has tube receiving openings 2, so-called passages, in which the tube ends 3 a of flat tubes 3 are accommodated.
  • corrugated fins 4 are arranged, which abut with their wave crests on the flat sides of the flat tubes 3.
  • Flat tubes 3 and corrugated ribs 4 form a so-called finned tube block, which is completed laterally, ie at the outermost corrugated fin 4 by a side part 5.
  • the latter has a tab 5a, which is pushed through a likewise formed as a passage opening 6 in the tube sheet 1.
  • the outgoing from the finned tube block expansions or resulting forces are thus deposited on the side of the tube 5 to the tube sheet 1.
  • the flat tubes 3 are preferably made of a solder-plated aluminum sheet and are longitudinally welded.
  • the ribs 4 are also made of an aluminum alloy, but they are often not solder plated, because the relatively hard Lotplatt réelle the life of the cutting tools for The ribs used are impaired.
  • a collection box not shown, preferably formed as a plastic injection molded part, placed and mechanically connected to the tube sheet 1.
  • the abovementioned parts together form a brazed heat exchanger 7, which can preferably be used as a coolant radiator of a motor vehicle.
  • the flat tubes 3 are thus flowed through by the coolant of a cooling circuit of an internal combustion engine of the motor vehicle, with pressures in the range of 1, 3 to 1.5 bar (sometimes even above) occur; Thus, there is a risk that the flat tubes 3 are inflated under the prevailing internal pressure, if not the support effect by the corrugated fins 4 stock. Therefore, the ribs 4 extend with their end portions 4a as close as possible, preferably to directly to the tube sheet 1.
  • the tube sheet 1 is arc-shaped between the passages 2, ie, it has a curved towards the air side arc 1 a, at its apex vertex 8 is arranged.
  • the corrugated fin 4 bears with its outermost end 4a on the nub 8 - this results in a minimum contact between the tube sheet 1 and the corrugated fin end 4a.
  • Fig. 2 shows the tube sheet 1 with flat tube 3 in a cross section.
  • the coolant cooler 7 has in this embodiment, only a series of flat tubes 3, which extend almost over the entire width of the tube sheet 1, as well as the passages 2, in which the pipe ends 3a are added and soldered.
  • the corrugated fin 4 lies on the flat side of the flat tube 3 with their wave crests and projects beyond the depth of the flat tube 3 in both directions, ie to the inflow side and the outflow side of the coolant cooler 7 through flowing ambient air.
  • a common, ie continuous rib 4 can be used for both rows of tubes, ie as shown. From the tube sheet 1 is in Fig.
  • such an expression may also be formed as a bead or similar shape, which serves the purpose of preventing the unwanted Lotpound from the tube sheet to the rib, d. H. to act as a "Lot bathbremse".
  • This could be z. B. also be done by a curvature of the soil in such a way that also give only a point contact or single point touches.
  • several nubs may be advantageous to prevent any tilting of the rib.

Abstract

In a particular region (1a) of the tubeplate (1), between adjacent openings (2) holding the radiator tubes, a point- or line elevation (8) is formed. This located on one side of the zig-zag fins (4). The elevation is formed from the tubeplate by pressing, as a stud or groove. The flat tubes (3) are soldered to the fins, and/or the tube ends are soldered to the tubeplate. Tubeplate and flat tubes are plated with solder. The elevation assures minimal contact between the tubeplate and the zig-zag fins (4, 4a), during the flow of solder.

Description

Die Erfindung betrifft einen Wärmeübertrager nach dem Oberbegriff des Patentanspruches 1. Dokument FR 2 254 771 offenbart einen derartigen Wärmeübertrager.The invention relates to a heat exchanger according to the preamble of claim 1. document FR 2 254 771 discloses such a heat exchanger.

Bekannte Wärmeübertrager bestehen aus einem Block von Rohren und Rippen, die miteinander verlötet werden. Aus dem Block stehen Rohrenden der Rohre hervor, welche in Aufnahmeöffnungen von Rohrböden, so genannte Durchzüge eingesetzt und mit den Rohrböden dicht verlötet werden. Auf die Rohrböden werden nach dem Lötprozess Sammelkästen aufgesetzt, welche als Kunststoff- oder auch als Metallkästen ausgebildet sind. Die miteinander zu verlötenden Teile wie Rohre, Rippen und Rohrböden bestehen aus Aluminiumlegierungen und werden hartgelötet, wobei das Lot vorzugsweise als Plattierung auf das Grundmaterial aufgebracht wird. Insbesondere ist auf den Rohrböden und auf den als Flachrohre ausgebildeten Rohren eine Plattierung vorgesehen. Die zwischen den Flachrohren angeordneten Rippen sind als Wellrippen ausgebildet und weisen aus technologischen Gründen häufig keine Plattierung auf. Die Wellrippen verlöten mit ihren Wellenkämmen an den flachen Seiten der Flachrohre und stellen somit eine gute wärmeleitende Verbindung her. Die Innendrücke in den Flachrohren sind vom Einsatzzweck her unterschiedlich: bei Kühlmittelkühlern für Kraftfahrzeuge beträgt der Innendruck beispielsweise 1,3 bis 1,5 bar, mit steigender Tendenz. Damit ergibt sich die Gefahr, dass die Flachrohre durch den Innendruck "aufgebläht" werden, was zum Undichtwerden der Rohre führen kann. Die beiderseits der Flachrohre angeordneten Wellrippen üben daher eine Abstützkraft auf die Außenseiten der Flachrohre aus. Probleme hinsichtlich der Innendruckfestigkeit können sich für die Flachrohre dort ergeben, wo die Abstützwirkung der Wellrippen nicht gegeben ist, was beispielsweise im bodennahen Bereich der Fall ist.Known heat exchangers consist of a block of tubes and ribs which are soldered together. From the block are pipe ends of the tubes out, which are used in receiving openings of tube sheets, so-called passages and sealed to the tube sheets. On the tube sheets collecting boxes are placed after the soldering process, which are designed as plastic or as metal boxes. The parts to be soldered together such as pipes, ribs and tube sheets are made of aluminum alloys and are brazed, the solder is preferably applied as a plating on the base material. In particular, plating is provided on the tubesheets and on the tubes designed as flat tubes. The arranged between the flat tubes ribs are formed as corrugated ribs and often have no plating for technological reasons. The corrugated ribs solder with their wave crests on the flat sides of the flat tubes and thus produce a good heat-conducting connection. The internal pressures in the flat tubes are different in purpose: with coolant radiators for motor vehicles, the internal pressure, for example, 1.3 to 1.5 bar, with rising tendency. This results in the risk that the flat tubes are "inflated" by the internal pressure, which can lead to leaking pipes. The corrugated fins arranged on both sides of the flat tubes therefore practice a supporting force on the outer sides of the flat tubes. Problems with respect to the internal pressure resistance can arise for the flat tubes where the supporting effect of the corrugated ribs is not given, which is the case, for example, in the vicinity of the ground.

Dieses Problem und auch verschiedene Lösungen dieses Problems sind in der DE 40 31 577 A1 der Anmelderin beschrieben. Eine Lösung zur Erzielung einer Abstützwirkung sieht vor, dass die Wellrippen bis an den Rohrboden heranreichen und in diesem bodennahen Bereich gerafft sind, wodurch sich eine noch stärkere Abstützwirkung für die Flachrohre ergibt Daraus resultiert allerdings ein weiteres Problem, nämlich ein unerwünschter Lotfluss während des Lötprozesses in die Rippen, insbesondere, wenn die Wellrippen am Ende gerafft sind. Infolge der engen Spalte in diesem Bereich wird das Lot durch Kapillarwirkung abgezogen, es bilden sich so genannte Nester, d. h. massive Lotansammlungen. Darüber hinaus kann das in die Nester gewanderte Lot für die Dichtlötung der Rohrenden in den Durchzügen fehlen, sodass die Rohrbodenverbindungen mangelhaft gelötet und insbesondere undicht sind.This problem and also different solutions to this problem are in the DE 40 31 577 A1 the applicant described. A solution for achieving a supporting effect provides that the corrugated fins reach up to the tubesheet and are gathered in this area near the ground, which results in an even stronger supporting effect for the flat tubes. However, this results in a further problem, namely an undesirable solder flow during the soldering process the ribs, especially when the corrugated ribs are gathered at the end. Due to the narrow gaps in this area, the solder is drawn off by capillary action, forming so-called nests, ie massive Lotansammlungen. In addition, the migrated into the nests solder for the Dichtlötung the pipe ends are missing in the passages, so that the tube bottom connections are poorly soldered and leaking in particular.

Es ist Aufgabe der vorliegenden Erfindung, einen Wärmeübertrager der eingangs genannten Art hinsichtlich seiner Festigkeit, insbesondere im Rohr/Boden-Bereich zu verbessern.It is an object of the present invention to improve a heat exchanger of the type mentioned in terms of its strength, in particular in the pipe / floor area.

Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst. Erfindungsgemäß ist vorgesehen, dass die Rohrböden im Bereich zwischen benachbarten Rohrenden punkt- oder linienförmige Erhebungen aufweisen, die zur Luftseite des Rohrbodens, d. h. zur Seite der Wellrippen hin gerichtet sind. Vorzugsweise können diese Erhebungen, mindestens eine zwischen benachbarten Rohren, als Noppen (punktförmig) oder Sicken (linienförmig) ausgebildet sein, welche aus dem Material des Rohrbodens zur Luftseite hin ausgeprägt sind. Durch die erfindungsgemäßen Ausprägungen ergibt sich der Vorteil, dass die Enden der Wellrippen, die bis an den Rohrboden heranreichen, einen minimalen Kontakt mit dem Rohrboden haben. Dadurch wird erreicht, dass während des Lötprozesses kein oder wenig Lot vom Rohrboden auf die Rippe fließt. Eine Anhäufung von Lot und damit die Gefahr des Durchlegierens werden somit vermieden. Darüber hinaus wird das vorzugsweise als Plattierung auf dem Rohrboden deponierte Lot für die Verlötung des Rohrbodens mit den Flachrohren benötigt - bei einem zu geringen Lotangebot im Bereich der Rohrbodenverbindung ließe sich keine Dichtlötung erzielen. Andererseits wird der Vorteil, dass die Wellrippen die Flachrohre auch im bodennahen Bereich abstützen, beibehalten. Die Bildung von so genannten Nestern - wie sie aus dem Stand der Technik bekannt ist - im Bereich von gerafften Rippenenden wird ebenfalls vermieden. Anstelle der erfindungsgemäßen Noppen oder Sicken sind auch andere Gestaltungen des Rohrbodens denkbar, die einen Lotfluss vom Rohrboden auf die Rippe verhindern, z. B. eine ballige oder gewölbte Ausbildung des Rohrbodens zur Luftseite hin, sodass sich nur eine minimale (punkt- oder linienförmige) Kontaktfläche zwischen Rohrboden und Wellrippenende ergibt.This object is solved by the features of claim 1. According to the invention, it is provided that the tubesheets have punctiform or linear elevations in the region between adjacent tube ends, which elevations are directed toward the air side of the tubesheet, that is, toward the side of the corrugated ribs. Preferably, these elevations, at least one between adjacent tubes, as nubs (point-shaped) or beads (linear) may be formed, which are pronounced from the material of the tube sheet to the air side. The embodiments according to the invention have the advantage that the ends of the corrugated fins, which reach up to the tubesheet, have minimal contact with the tubesheet. This ensures that during the soldering process no or little solder flows from the tube sheet to the rib. An accumulation of solder and thus the danger of Durchlegierens are thus avoided. In addition, the solder preferably deposited as a cladding on the tubesheet is required for the soldering of the tubesheet with the flat tubes - with a too low Lotangebot in the field of tube sheet connection could not achieve Dichtlötung. On the other hand, the advantage that the corrugated fins support the flat tubes in the ground-level area, maintained. The formation of so-called nests - as known in the art - in the area of shirred rib ends is also avoided. Instead of nubs or beads according to the invention, other designs of the tube sheet are conceivable, which prevent a Lotfluss from the tube sheet to the rib, z. B. a convex or curved formation of the tube bottom to the air side, so that only a minimal (point or line) contact surface between the tube sheet and corrugated fin results.

Die erfindungsgemäße Ausbildung des Rohrbodens mit luftseitig ausgeprägten Noppen oder Sicken ist besonders vorteilhaft für einen Kühlmittelkühler eines Kraftfahrzeuges anwendbar. Die Ausformung der Noppen oder Sicken ist herstellungstechnisch relativ einfach und kann ohne nennenswerten zusätzlichen Aufwand gleichzeitig mit der Herstellung des Rohrbodens, z. B. beim Lochstanzprägen der Durchzüge zur Aufnahme der Rohrenden, erfolgen.The inventive design of the tube sheet with air-side pronounced knobs or beads is particularly advantageous for a coolant radiator of a motor vehicle applicable. The shape of the knobs or beads manufacturing technology is relatively simple and can be done without significant additional effort at the same time with the production of the tube sheet, z. B. in the punching punching of the passages for receiving the pipe ends done.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher beschrieben. Es zeigen

Fig. 1
einen Längsschnitt durch einen teilweise dargestellten Rohrboden mit Flachrohren sowie Wellrippen und
Fig. 2
einen Querschnitt durch den Rohrboden mit Flachrohr.
An embodiment of the invention is illustrated in the drawing and will be described in more detail below. Show it
Fig. 1
a longitudinal section through a partially shown tube sheet with flat tubes and corrugated fins and
Fig. 2
a cross section through the tube sheet with flat tube.

Fig. 1 einen teilweise dargestellten Rohrboden 1 im Längsschnitt. Der Rohrboden ist vorzugsweise aus einer Aluminiumlegierung hergestellt und weist Rohraufnahmeöffnungen 2, so genannte Durchzüge auf, in welchen die Rohrenden 3a von Flachrohren 3 aufgenommen sind. Zwischen den Flachrohren 3 sind Wellrippen 4 angeordnet, welche mit ihren Wellenkämmen an den flachen Seiten der Flachrohre 3 anliegen. Flachrohre 3 und Wellrippen 4 bilden einen so genannten Rippenrohrblock, welcher seitlich, d. h. an der äußersten Wellrippe 4 durch ein Seitenteil 5 abgeschlossen ist. Letzteres weist eine Lasche 5a auf, welche durch eine ebenfalls als Durchzug ausgebildete Öffnung 6 im Rohrboden 1 durchgesteckt ist. Die vom Rippenrohrblock ausgehenden Dehnungen bzw. daraus resultierende Kräfte werden somit über das Seitenteil 5 auf den Rohrboden 1 abgesetzt. Die Flachrohre 3 werden vorzugsweise aus einem lotplattierten Aluminiumblech hergestellt und sind längsnahtverschweißt. Die Rohrenden 3a sind mit den Durchzügen 2 verlötet, ebenso die Lasche 5a des Seitenteiles 5 mit dem Durchzug 6. Die Rippen 4 bestehen ebenfalls aus einer Aluminiumlegierung, sie sind allerdings häufig nicht lotplattiert, weil die relativ harte Lotplattierung die Standzeit der Schneidwerkzeuge, die für die Rippenherstellung verwendet werden, beeinträchtigt. Auf den Rohrboden 1 wird ein nicht dargestellter Sammelkasten, vorzugsweise als Kunststoffspritzteil ausgebildet, aufgesetzt und mechanisch mit dem Rohrboden 1 verbunden. Die oben genannten Teile bilden zusammen einen gelöteten Wärmeübertrager 7, der vorzugsweise als Kühlmittelkühler eines Kraftfahrzeuges einsetzbar ist. Die Flachrohre 3 werden somit vom Kühlmittel eines Kühlkreislaufes einer Brennkraftmaschine des Kraftfahrzeuges durchströmt, wobei Drücke im Bereich von 1, 3 bis 1,5 bar (teilweise auch darüber) auftreten; damit besteht die Gefahr, dass die Flachrohre 3 unter dem herrschenden Innendruck aufgebläht werden, wenn nicht die Stützwirkung durch die Wellrippen 4 bestände. Deshalb erstrecken sich die Rippen 4 mit ihren Endbereichen 4a möglichst nahe, vorzugsweise bis unmittelbar an den Rohrboden 1. Der Rohrboden 1 ist zwischen den Durchzügen 2 bogenförmig ausgebildet, d. h. er weist einen zur Luftseite hin ausgewölbten Bogen 1 a auf, an dessen Scheitelpunkt eine Noppe 8 angeordnet ist. Die Wellrippe 4 liegt mit ihrem äußersten Ende 4a an der Noppe 8 an - dadurch ergibt sich ein minimaler Kontakt zwischen dem Rohrboden 1 und dem Wellrippenende 4a. Fig. 1 a partially illustrated tube sheet 1 in longitudinal section. The tubesheet is preferably made of an aluminum alloy and has tube receiving openings 2, so-called passages, in which the tube ends 3 a of flat tubes 3 are accommodated. Between the flat tubes 3 corrugated fins 4 are arranged, which abut with their wave crests on the flat sides of the flat tubes 3. Flat tubes 3 and corrugated ribs 4 form a so-called finned tube block, which is completed laterally, ie at the outermost corrugated fin 4 by a side part 5. The latter has a tab 5a, which is pushed through a likewise formed as a passage opening 6 in the tube sheet 1. The outgoing from the finned tube block expansions or resulting forces are thus deposited on the side of the tube 5 to the tube sheet 1. The flat tubes 3 are preferably made of a solder-plated aluminum sheet and are longitudinally welded. The ribs 4 are also made of an aluminum alloy, but they are often not solder plated, because the relatively hard Lotplattierung the life of the cutting tools for The ribs used are impaired. On the tubesheet 1, a collection box, not shown, preferably formed as a plastic injection molded part, placed and mechanically connected to the tube sheet 1. The abovementioned parts together form a brazed heat exchanger 7, which can preferably be used as a coolant radiator of a motor vehicle. The flat tubes 3 are thus flowed through by the coolant of a cooling circuit of an internal combustion engine of the motor vehicle, with pressures in the range of 1, 3 to 1.5 bar (sometimes even above) occur; Thus, there is a risk that the flat tubes 3 are inflated under the prevailing internal pressure, if not the support effect by the corrugated fins 4 stock. Therefore, the ribs 4 extend with their end portions 4a as close as possible, preferably to directly to the tube sheet 1. The tube sheet 1 is arc-shaped between the passages 2, ie, it has a curved towards the air side arc 1 a, at its apex vertex 8 is arranged. The corrugated fin 4 bears with its outermost end 4a on the nub 8 - this results in a minimum contact between the tube sheet 1 and the corrugated fin end 4a.

Fig. 2 zeigt den Rohrboden 1 mit Flachrohr 3 in einem Querschnitt. Der Kühlmittelkühler 7 weist in diesem Ausführungsbeispiel nur eine Reihe von Flachrohren 3 auf, welche sich nahezu über die gesamte Breite des Rohrbodens 1 erstrecken, ebenso wie die Durchzüge 2, in denen die Rohrenden 3a aufgenommen und verlötet sind. Die Wellrippe 4 liegt an der flachen Seite des Flachrohres 3 mit ihren Wellenkämmen an und überragt die Tiefe des Flachrohres 3 in beiden Richtungen, also zur Anströmseite und zur Abströmseite der den Kühlmittelkühler 7 durchströmenden Umgebungsluft. Bei einer zweireihigen Ausbildung des Kühlmittelkühlers und fluchtender Anordnung der Rohre kann eine gemeinsame, d. h. durchgehende Rippe 4 für beide Rohrreihen verwendet werden, d. h. wie dargestellt. Aus dem Rohrboden 1 ist die in Fig. 1 bereits dargestellte Noppe 8 ausgeformt, welche das oberste Ende 4a der Wellrippe 4 kontaktiert, und zwar im Wesentlichen punktuell. Bei der Montage des Kühlmittelkühlers 7, insbesondere bei dem so genannten Kassettiervorgang ist somit sichergestellt, dass die Wellrippe nicht mit ihrer gesamten Fläche an der Unterseite (Luftseite) des Rohrbodens 1 anliegt. Diese Maßnahme ist von Bedeutung für den sich anschließenden Lötprozess, bei welchem Flachrohre 3, Wellrippen 4 und Rohrboden 1 miteinander verlötet werden. Durch die minimale punktuelle Berührung zwischen Rohrboden 1 und Wellrippe 4 wird ein Lotfluss vom Rohrboden 1, auf dem sich die Lotplattierung befindet, zur Rippe, auf welcher sich keine Lotplattierung befindet, praktisch unterbunden. Damit kann es nicht zu unerwünschten Lotanhäufungen, verbunden mit eventuellen Durchlegierungen oder so genanten Nestern im Endbereich der Wellrippen 4 kommen. Andererseits verbleibt am Rohrboden, insbesondere im Bereich der Durchzüge ein hinreichendes Lotangebot, um die Rohrenden 3 auf Anhieb dicht zu löten. Fig. 2 shows the tube sheet 1 with flat tube 3 in a cross section. The coolant cooler 7 has in this embodiment, only a series of flat tubes 3, which extend almost over the entire width of the tube sheet 1, as well as the passages 2, in which the pipe ends 3a are added and soldered. The corrugated fin 4 lies on the flat side of the flat tube 3 with their wave crests and projects beyond the depth of the flat tube 3 in both directions, ie to the inflow side and the outflow side of the coolant cooler 7 through flowing ambient air. In a double-row design of the coolant radiator and aligned arrangement of the tubes, a common, ie continuous rib 4 can be used for both rows of tubes, ie as shown. From the tube sheet 1 is in Fig. 1 formed nub 8 already formed, which contacts the uppermost end 4a of the corrugated fin 4, namely substantially punctiform. During assembly of the coolant cooler 7, in particular in the case of the so-called cassette-setting process, it is thus ensured that the corrugated rib does not abut with its entire surface on the underside (air side) of the tube bottom 1. This measure is important for the subsequent soldering process, in which flat tubes 3, corrugated fins 4 and tubesheet 1 are soldered together. Due to the minimal punctual contact between tube sheet 1 and corrugated fin 4, a solder flow from the tube sheet 1, on which the Lotplattierung is located to the rib, on which there is no Lotplattierung, practically prevented. This can not lead to unwanted Lotanhäufungen, associated with any alloys or so-called nests in the end of the corrugated fins 4. On the other hand, remains at the tube sheet, in particular in the area of the passages a sufficient Lotangebot to solder the pipe ends 3 immediately leakproof.

Abweichend vom dargestellten Ausführungsbeispiel einer Noppe 8, kann eine derartige Ausprägung auch als Sicke oder ähnliche Form ausgebildet sein, welche den Zweck erfüllt, den unerwünschten Lotfluss vom Rohrboden zur Rippe zu unterbinden, d. h. als "Lotflussbremse" zu wirken. Dies könnte z. B. auch durch eine Wölbung des Bodens in der Weise erfolgen, dass sich ebenfalls nur eine Punktberührung oder einzelne Punktberührungen ergeben. Insofern können auch mehrere Noppen vorteilhaft sein, um ein eventuelles Schrägstellen der Rippe zu verhindern.Notwithstanding the illustrated embodiment of a nub 8, such an expression may also be formed as a bead or similar shape, which serves the purpose of preventing the unwanted Lotfluss from the tube sheet to the rib, d. H. to act as a "Lotflussbremse". This could be z. B. also be done by a curvature of the soil in such a way that also give only a point contact or single point touches. In this respect, several nubs may be advantageous to prevent any tilting of the rib.

Claims (6)

  1. Heat exchanger, which comprises a block (finned tube block) consisting of flat tubes (3) with tube ends (3a) and corrugated fins (4) arranged between the flat tubes (3), and a tube plate (1) with holding openings (2) in which the tube ends (3a) can be held, the corrugated fins (4, 4a) extending as far as the tube plate (1), characterised in that at least one punctiform or linear elevation (8) is arranged on the tube plate (1) in the area between adjacent holding openings (2) on the side of the corrugated fins (4).
  2. Heat exchanger according to Claim 1, characterised in that the at least one elevation (8) is formed, in particular pressed, from the tube plate (1) itself.
  3. Heat exchanger according to Claim 2, characterised in that the at least one elevation is formed as a bump (8) and/or as a crease.
  4. Heat exchanger according to Claims 1, 2 or 3, characterised in that the flat tubes (3) can be soldered to the corrugated fins (4) and the tube plate (1, 2) to the tube ends (3a).
  5. Heat exchanger according to Claim 4, characterised in that the tube plate (1) and the flat tubes (3) have a solder cladding and the elevations (8) on the fins side form minimal contact points between the tube plate (1) and the corrugated fins (4, 4a) during the flow of the solder.
  6. Heat exchanger according to any of the preceding claims, characterised in that it is designed as a coolant-medium cooler (7) for cooling an internal combustion engine of a motor vehicle.
EP07002886A 2006-02-14 2007-02-12 Heat exchanger Not-in-force EP1832830B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006006946A DE102006006946A1 (en) 2006-02-14 2006-02-14 Vehicle heat exchanger, e.g. car radiator, includes tubeplate with elevations preventing undesired flow of solder away from openings into which flat tubes are soldered

Publications (2)

Publication Number Publication Date
EP1832830A1 EP1832830A1 (en) 2007-09-12
EP1832830B1 true EP1832830B1 (en) 2009-01-21

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Application Number Title Priority Date Filing Date
EP07002886A Not-in-force EP1832830B1 (en) 2006-02-14 2007-02-12 Heat exchanger

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EP (1) EP1832830B1 (en)
AT (1) ATE421671T1 (en)
DE (2) DE102006006946A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109891180B (en) * 2016-10-28 2021-07-09 法雷奥热系统公司 Collector plate for a motor vehicle heat exchanger
US10697716B2 (en) 2017-08-30 2020-06-30 Mahle International Gmbh Heat exchanger and header plate for heat exchanger
DE102019118853A1 (en) * 2019-07-11 2021-01-14 Volkswagen Aktiengesellschaft Arrangement structure for cooling a battery, in particular a battery module of a motor vehicle

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254771B1 (en) * 1973-12-13 1976-11-19 Chausson Usines Sa
DE4137037A1 (en) * 1991-07-02 1993-01-14 Thermal Waerme Kaelte Klima COLLECTOR FOR A FLAT TUBE CONDENSER
FR2681938B1 (en) * 1991-10-01 1993-12-03 Valeo Thermique Moteur FLUID BOX WITH TUBULAR WALL FOR HEAT EXCHANGER.
JPH0678877B2 (en) * 1993-08-01 1994-10-05 株式会社マルナカ Pipe for refrigerant condenser
JPH10197190A (en) * 1997-01-14 1998-07-31 Zexel Corp Header pipe for heat exchanger
US5899267A (en) * 1998-09-14 1999-05-04 General Motors Corporation Heat exchanger sealed tank and header assembly with gasket displacement prevention
DE10316756A1 (en) * 2003-04-10 2004-10-28 Behr Gmbh & Co. Kg Heat exchangers, in particular intercoolers for motor vehicles
JP4291644B2 (en) * 2003-08-01 2009-07-08 カルソニックカンセイ株式会社 Heat exchanger

Also Published As

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ATE421671T1 (en) 2009-02-15
DE102006006946A1 (en) 2007-08-23
EP1832830A1 (en) 2007-09-12
DE502007000391D1 (en) 2009-03-12

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