EP0326813A1 - Heat exchanger, especially an aluminium water-air cooler - Google Patents

Heat exchanger, especially an aluminium water-air cooler Download PDF

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Publication number
EP0326813A1
EP0326813A1 EP89100302A EP89100302A EP0326813A1 EP 0326813 A1 EP0326813 A1 EP 0326813A1 EP 89100302 A EP89100302 A EP 89100302A EP 89100302 A EP89100302 A EP 89100302A EP 0326813 A1 EP0326813 A1 EP 0326813A1
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EP
European Patent Office
Prior art keywords
tube
heat exchanger
flat tubes
tabs
tubes
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Granted
Application number
EP89100302A
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German (de)
French (fr)
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EP0326813B1 (en
Inventor
Gerhard Schwenk
Josef Kreutzer
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Mahle Behr GmbH and Co KG
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Behr GmbH and Co KG
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Publication of EP0326813A1 publication Critical patent/EP0326813A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • 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
    • F28D1/04—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 tubular conduits
    • F28D1/053—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 tubular conduits the conduits being straight
    • F28D1/0535—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 tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • 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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments

Definitions

  • the innovation concerns a heat exchanger according to the preamble of protection claim 1.
  • a heat exchanger with rectangular tubes (DE 26 24 879 A1) is known in which the tube ends are pressed into conical openings in tube sheets and are kept sealed by deforming elastic collars. In order to be able to compensate for the pressure exerted by the collars, reinforcements in the form of meandering strips are inserted into the pipe ends. Such a design is complex.
  • the innovation is based on the object of designing a heat exchanger of the type mentioned at the outset in such a way that the tubes can be prevented from falling in without the production outlay being too great.
  • the characterizing features of claim 1 are provided in a heat exchanger of the type mentioned.
  • the arrangement of at least one support web between the parallel tube walls makes the flat tubes more stable in the area in which denting is to be feared.
  • the disadvantageous collapse of the pipes on the walls can be avoided.
  • the support web can be produced in a particularly simple manner, in particular according to the features of claims 2 and 3.
  • the tabs can be punched out and bent in a simple manner by means of punching and shaping dies which, after the tubes have been drawn into their corresponding passages in the tube sheets, act on the ends of the tubes at the ends. A separate operation is not necessary for this.
  • the punching and bending of the tabs can be coupled with the cassette process, ie with the process of pulling the tubes into the tube sheet.
  • the pipe ends can be prepared accordingly using the appropriate cut and shape punches, which can be arranged in the bottom press-on receptacle, before the soldering process is carried out.
  • Fig. 1 shows several flat tubes (1) which are arranged parallel to each other with their side surfaces to form a heat exchanger and are held at the ends in a tube sheet (3).
  • the tube sheet (3) which is preferably made of aluminum, is provided in a known manner with a circumferential flanged edge (7) into which the free edge of a hood-shaped water box, for example made of plastic, can be inserted tightly.
  • All flat tubes (1) have a very narrow, long through flow cross-section, whose width (a), (see FIG. 2), is in the order of a few millimeters, preferably even in the order of approximately 1 mm.
  • the flat tubes (1) are also made of aluminum.
  • the flat tubes (1) themselves, if it is a water / air cooler for a vehicle engine, as in the exemplary embodiment, are traversed by water, which is fed to one of the water boxes, not shown, and either deflected or diverted from the other water box.
  • the openings (2) designated as passages are slightly funnel-shaped from one side of the tube sheet (3).
  • the tube ends (1a) of the flat tubes (1) are pushed into these openings in a known manner. If all of the flat tubes (1) are "cassetted" by inserting their tube ends into the assigned tube sheets (3), then a cutting and shaping stamp coupled to the tube sheet receptacle can be placed in the middle - in the plane (M) of FIG. 1 - of the front end (1b) of the two opposite tube walls (4 and 4 ') are each punched out of a tab (6, 6').
  • the tabs (6, 6 ') are simultaneously bent so that they lie against each other with their ends (6a and 6a'), (Fig.
  • this measure creates support webs (5) in each flat tube (1), which lie in the middle (M) of the flat tubes (1) and which are used for stiffening the tube ends (1a) in the area of the tube sheets (3).
  • This support webs (5) prevent that during the subsequent soldering process, in which the tube ends (1a) are soldered to the tube sheets (3), the adverse appearance of the denting of the tube walls (4, 4 ') occurs inwards.
  • the flat tubes (1) can therefore be firmly and tightly connected to the tube sheet (3). The same applies to the tube sheet, not shown, assigned to the other tube ends.
  • the support web (5) is formed by two tabs bent inwards from opposite walls.
  • this embodiment is particularly simple in terms of production technology, it is of course also conceivable to form the support web, for example by punching out and bending a tab, only from one wall.
  • Other possibilities are also conceivable, such as the arrangement of a plurality of support webs distributed over the pipe width. However, such measures require a greater manufacturing effort.

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

Abstract

The heat exchanger consists of a plurality of flat tubes (1) which are aligned with their side faces mutually parallel and are held in a leakproof fashion with both ends in corresponding openings of tube bottoms (3). In the region of the plane of the tube bottoms (3), there is provided at least one supporting web (5), which extends between the parallel tube walls (4) of the flat tubes (1) and is formed by lugs (6, 6') which are stamped from the tube wall (4) and bent inwards. Owing to these measures, the flat tubes are more stably formed in the region in which denting is to be feared because of the pressure forces of the tube bottoms. <IMAGE>

Description

Die Neuerung betrifft einen Wärmetauscher nach dem Oberbegriff des Schutzanspruches 1.The innovation concerns a heat exchanger according to the preamble of protection claim 1.

Bei Wärmetauschern dieser Art, insbesondere wenn die Flachrohre und die Rohrböden aus Aluminium bestehen, treten bei der Ferti­gung Probleme dadurch auf, daß die Flachrohre in den als Durch­zügen bezeichneten schlitzartigen Öffnungen in den Rohrböden nach dem Löten nach innen eingefallen sind und dadurch nicht genügende Festigkeit und Dichtigkeit aufweisen. Dies tritt so­wohl auf bei Flachrohren, die innen mit Turbulenzeinlagen be­stückt sind, insbesondere aber bei Rohren ohne solche Turbulenz­einlagen. Bei relativ schmalen Flachrohren, die beispielsweise nur eine Breite von ca. 1 mm aufweisen, bringt die Anordnung von Turbulenzeinlagen nur noch einen Druckverlust mit sich, aber keinen Vorteil mehr hinsichtlich einer turbulenten Durch­strömung. Solche schmalen Rohre werden daher in der Regel ohne Turbulenzeinlagen verwendet. Bei ihnen tritt das geschilderte Problem auf.In heat exchangers of this type, especially when the flat tubes and the tube sheets are made of aluminum, problems arise during production in that the flat tubes in the slot-like openings in the tube sheets, which are referred to as passages, have collapsed inwards after soldering and as a result are insufficient strength and Have tightness. This occurs both in the case of flat tubes which are equipped with turbulence inserts on the inside, but in particular in the case of tubes without such turbulence inserts. In the case of relatively narrow flat tubes, which for example only have a width of approx. 1 mm, the arrangement of turbulence inserts only brings about a pressure loss, but no longer an advantage with regard to turbulent flow. Such narrow pipes are therefore generally used without turbulence inserts. They have the problem described.

Zurückzuführen dürfte dieses Einfallen der Rohre beim Löten entweder darauf zu sein, daß sich die dünneren Rohre durch die beim Lötvorgang auftretende Erwärmung schneller als der Rohrbo­den erwärmen, sich aber wegen der Verklemmung in den Durchzügen nicht ausdehnen können und daher einbeulen. Möglich kann es auch sein, daß von der Herstellung der Flachrohre her noch Ei­genspannungen in den Rohren vorhanden sind, die dann bei der Erwärmung während des Lötvorganges ebenfalls zum Einfallen der Rohre führen.This collapse of the tubes during soldering should either be due to the fact that the thinner tubes heat up faster than the tube plate due to the heating that occurs during the soldering process, but cannot expand due to the jamming in the passages and therefore dent. It may also be possible that residual stresses are present in the tubes from the manufacture of the flat tubes, which then also lead to the tubes collapsing when heated during the soldering process.

Es ist ein Wärmetauscher mit rechteckigen Rohren (DE 26 24 879 A1) bekannt, bei dem die Rohrenden in konische Öffnungen in Rohrböden hereingedrückt und durch Verformen von elastischen Kragen abgedichtet gehalten werden. Um hier den von den Krägen ausgeübten Druck ausgleichen zu können, sind in die Rohrenden Verstärkungen in Form von mäanderförmig gewundenen Streifen eingelegt. Eine solche Bauart ist aufwendig.A heat exchanger with rectangular tubes (DE 26 24 879 A1) is known in which the tube ends are pressed into conical openings in tube sheets and are kept sealed by deforming elastic collars. In order to be able to compensate for the pressure exerted by the collars, reinforcements in the form of meandering strips are inserted into the pipe ends. Such a design is complex.

Der Neuerung liegt die Aufgabe zugrunde, einen Wärmetauscher der eingangs genannten Art so auszubilden, daß das Einfallen der Rohre vermieden werden kann, ohne daß der Herstellungsauf­wand zu groß wird.The innovation is based on the object of designing a heat exchanger of the type mentioned at the outset in such a way that the tubes can be prevented from falling in without the production outlay being too great.

Zur Lösung dieser Aufgabe werden bei einem Wärmetauscher der eingangs genannten Art die kennzeichnenden Merkmale des Schutz­anspruches 1 vorgesehen. Durch die Anordnung von mindestens einem Abstützsteg zwischen den parallelen Rohrwänden sind die Flachrohre in dem Bereich, in dem das Einbeulen zu befürchten ist, stabiler ausgebildet. Das nachteilige Einfallen der Rohre an den Wänden kann vermieden werden.To solve this problem, the characterizing features of claim 1 are provided in a heat exchanger of the type mentioned. The arrangement of at least one support web between the parallel tube walls makes the flat tubes more stable in the area in which denting is to be feared. The disadvantageous collapse of the pipes on the walls can be avoided.

Der Abstützsteg läßt sich in besonders einfacher Weise insbe­sondere nach den Merkmalen der Ansprüche 2 und 3 herstellen. Die Laschen können in einfacher Weise durch Schnitt- und Formstempel ausgestanzt und umgebogen werden, die nach dem Einziehen der Rohre in ihre entsprechenden Durchzüge in den Rohrböden stirnseitig an den Rohrenden angreifen. Ein geson­derter Arbeitsgang wird dazu nicht notwendig. Das Ausstanzen und Umbiegen der Laschen kann mit dem Vorgang des Kassettie­rens, d.h. mit dem Vorgang des Einziehens der Rohre in den Rohrboden gekoppelt werden. Die Rohrenden können dabei durch die entsprechenden Schnitt- und Formstempel, die in der Boden­aufdrückaufnahme angeordnet werden können, entsprechend vor­bereitet werden, ehe der Lötvorgang vorgenommen wird. Vorteilhaft kann es nach den Merkmalen des Anspruches 4 sein, nur einen oder auch mehrere aus zwei Laschen bestehenden Ab­stützsteg in der Mitte der Flachrohre vorzusehen. Es hat sich gezeigt, daß ein solcher Abstützsteg ausreicht, dessen Breite, verglichen mit der in der größeren Ausdehnung gemessenen Rohr­breite, sehr klein gehalten werden kann. Eine nachteilige Be­einflussung des Durchströmvorganges ist daher nicht zu erwar­ten. Natürlich ist es auch möglich, Abstützstege zu mehreren nebeneinander, auch über die gesamte Rohrbreite verteilt, anzu­ordnen, wenn dies zweckmäßig erscheint. Nach den Merkmalen des Anspruches 5 können zusammen mit den Rohrenden, die in den Rohrböden verlötet werden, auch die beiden sich aneinander abstützenden Enden der Laschen verlötet werden.The support web can be produced in a particularly simple manner, in particular according to the features of claims 2 and 3. The tabs can be punched out and bent in a simple manner by means of punching and shaping dies which, after the tubes have been drawn into their corresponding passages in the tube sheets, act on the ends of the tubes at the ends. A separate operation is not necessary for this. The punching and bending of the tabs can be coupled with the cassette process, ie with the process of pulling the tubes into the tube sheet. The pipe ends can be prepared accordingly using the appropriate cut and shape punches, which can be arranged in the bottom press-on receptacle, before the soldering process is carried out. It can be advantageous according to the features of claim 4 to provide only one or more support web consisting of two straps in the middle of the flat tubes. It has been shown that such a supporting web is sufficient, the width of which can be kept very small compared to the pipe width measured in the larger dimension. An adverse influence on the flow-through process is therefore not to be expected. Of course, it is also possible to arrange supporting webs in a row next to one another, also distributed over the entire pipe width, if this appears expedient. According to the features of claim 5 can be soldered together with the tube ends that are soldered in the tube sheets, the two abutting ends of the tabs.

Die Neuerung ist anhand eines Ausführungsbeispieles in der Zeichnung dargestellt und wird im folgenden erläutert. Es zei­gen:

  • Fig. 1 eine Teildraufsicht auf die Stirnenden von Flach­rohren, die zur Bildung eines Wärmetauschers in einem Rohrboden gehalten sind,
  • Fig. 2 die vergrößerte Darstellung des Schnittes nach der Linie II-II in Fig. 1 und
  • Fig. 3 die Draufsicht - teilweise verkürzt - in Richtung des Pfeiles III auf eines der Rohre in der Fig.2.
The innovation is shown in the drawing using an exemplary embodiment and is explained below. Show it:
  • 1 is a partial plan view of the ends of flat tubes which are held in a tube sheet to form a heat exchanger,
  • Fig. 2 is an enlarged view of the section along the line II-II in Fig. 1 and
  • Fig. 3 is a plan view - partially shortened - in the direction of arrow III on one of the tubes in Fig.2.

Fig. 1 zeigt mehrere Flachrohre (1), die zur Bildung eines Wär­metauschers mit ihren Seitenflächen parallel zueinander ange­ordnet und mit den Enden in einem Rohrboden (3) gehalten sind. Der Rohrboden (3), der vorzugsweise aus Aluminium besteht, ist in bekannter Weise mit einem umlaufenden Bördelrand (7) verse­hen, in den der freie Rand eines haubenförmigen Wasserkastens, beispielsweise aus Kunststoff, dicht eingesetzt werden kann. Alle Flachrohre (1) weisen einen sehr schmalen, langen Durch­ strömungsquerschnitt auf, dessen Breite (a), (siehe Fig. 2), in der Größenordnung von wenigen Millimetern, vorzugsweise sogar in der Größenordnung von ca. 1 mm liegt. Auch die Flachrohre (1) bestehen aus Aluminium. Sie sind in gleichem Abstand zu­einander angeordnet und lassen es in bekannter Weise zu, daß in dem Raum zwischen den beiden Rohrboden (der zweite Rohrboden ist nicht gezeigt) und zwischen den einzelnen Flachrohren (1) lamellenartig ausgebildete Bleche eingefügt werden, die später von der als Wärmetauschmedium dienenden Luft parallel zu den Seitenflächen der Flachrohre (1) durchströmt werden. Die Flach­rohre (1) selbst werden, wenn es sich wie beim Ausführungsbei­spiel um einen Wasser/Luft-Kühler für einen Fahrzeugmotor han­delt, von Wasser durchströmt, das jeweils einem der nicht ge­zeigten Wasserkästen zugeleitet und von dem anderen Wasserka­sten entweder umgelenkt oder dort abgeleitet wird.Fig. 1 shows several flat tubes (1) which are arranged parallel to each other with their side surfaces to form a heat exchanger and are held at the ends in a tube sheet (3). The tube sheet (3), which is preferably made of aluminum, is provided in a known manner with a circumferential flanged edge (7) into which the free edge of a hood-shaped water box, for example made of plastic, can be inserted tightly. All flat tubes (1) have a very narrow, long through flow cross-section, whose width (a), (see FIG. 2), is in the order of a few millimeters, preferably even in the order of approximately 1 mm. The flat tubes (1) are also made of aluminum. You are arranged at the same distance from each other and allow it in a known manner that in the space between the two tube sheets (the second tube sheet is not shown) and between the individual flat tubes (1) lamellar-shaped sheets are inserted, which later by the Air flowing through the heat exchange medium is flowed through parallel to the side surfaces of the flat tubes (1). The flat tubes (1) themselves, if it is a water / air cooler for a vehicle engine, as in the exemplary embodiment, are traversed by water, which is fed to one of the water boxes, not shown, and either deflected or diverted from the other water box.

Aus der vergrößerten Darstellung der Fig.2 und 3 wird deutlich, daß die als Durchzüge bezeichneten Öffnungen (2) von einer Sei­te des Rohrbodens (3) her leicht trichterförmig ausgebildet sind. In diese Öffnungen werden in bekannter Weise die Rohren­den (1a) der Flachrohre (1) eingeschoben. Sind alle Flachrohre (1) durch Einschieben ihrer Rohrenden in die zugeordneten Rohr­böden (3) "kassettiert", dann kann durch einen mit der Rohrbo­denaufnahme gekoppelten Schnitt- und Formstempel jeweils in der Mitte - in der Ebene (M) der Fig. 1 - von dem Stirnende (1b) der beiden gegenüberliegenden Rohrwände (4 und 4′) aus je eine Lasche (6, 6′) ausgestanzt werden. Die Laschen (6, 6′) werden gleichzeitig so umgebogen, daß sie mit ihren Stirnenden (6a bzw. 6a′), (Fig. 3), aneinanderliegen. Zu diesem Zweck wird zweckmäßig vorgesehen, die Rohrenden (1a) so weit über den Rohrboden (3) vorstehen zu lassen, daß dies mindestens der Hälfte der Breite (a) der Flachrohre (1) entspricht. Es steht dann genügend Material zur Verfügung, um die Laschen (6, 6′) auszustanzen und nach dem Umbiegen aneinander anliegen zu lassen.From the enlarged representation of FIGS. 2 and 3 it is clear that the openings (2) designated as passages are slightly funnel-shaped from one side of the tube sheet (3). The tube ends (1a) of the flat tubes (1) are pushed into these openings in a known manner. If all of the flat tubes (1) are "cassetted" by inserting their tube ends into the assigned tube sheets (3), then a cutting and shaping stamp coupled to the tube sheet receptacle can be placed in the middle - in the plane (M) of FIG. 1 - of the front end (1b) of the two opposite tube walls (4 and 4 ') are each punched out of a tab (6, 6'). The tabs (6, 6 ') are simultaneously bent so that they lie against each other with their ends (6a and 6a'), (Fig. 3). For this purpose, it is expedient to allow the pipe ends (1a) to protrude so far beyond the pipe base (3) that this corresponds to at least half the width (a) of the flat pipes (1). Sufficient material is then available to punch out the tabs (6, 6 ') and to rest against each other after the bending.

Wie den Fig. 2 und 3 entnehmbar ist, entstehen durch diese Maß­nahme in jedem Flachrohr (1) Abstützstege (5), die in der Mitte (M) der Flachrohre (1) liegen und die für eine Aussteifung der Rohrenden (1a) im Bereich der Rohrböden (3) sorgen. Diese Ab­stützstege (5) verhindern, daß beim anschließenden Lötvorgang, bei dem die Rohrenden (1a) mit den Rohrböden (3) verlötet wer­den, die nachteilige Erscheinung des Einbeulens der Rohrwände (4, 4′) nach innen auftritt. Die Flachrohre (1) können daher fest und dicht mit dem Rohrboden (3) verbunden werden. Gleiches gilt für den nicht gezeigten, den anderen Rohrenden zuge­ordneten Rohrboden.As can be seen in FIGS. 2 and 3, this measure creates support webs (5) in each flat tube (1), which lie in the middle (M) of the flat tubes (1) and which are used for stiffening the tube ends (1a) in the area of the tube sheets (3). This support webs (5) prevent that during the subsequent soldering process, in which the tube ends (1a) are soldered to the tube sheets (3), the adverse appearance of the denting of the tube walls (4, 4 ') occurs inwards. The flat tubes (1) can therefore be firmly and tightly connected to the tube sheet (3). The same applies to the tube sheet, not shown, assigned to the other tube ends.

Wie sich aus den Fig. 1 und insbesondere Fig. 3 ergibt, genügt die Anordnung eines einzigen Abstützsteges (5) in der Mitte der Flachrohre (1). Da die den Abstützsteg (5) bildenden Laschen (6, 6′), verglichen mit der senkrecht zu dem Abstand (a) ge­messenen Breite der Flachrohre (1), nur eine sehr kleine Breite aufweisen, tritt nur eine vernachlässigbare Beeinflussung des freien Durchströmquerschnittes der Flachrohre (1) auf. Es kann aber auf einfache Weise das sonst zu befürchtende Einbeulen während des Lötvorganges vermieden werden.As can be seen from FIG. 1 and in particular FIG. 3, it is sufficient to arrange a single support web (5) in the middle of the flat tubes (1). Since the brackets (5) forming tabs (6, 6 '), compared to the width of the flat tubes (1) measured perpendicular to the distance (a), have only a very small width, there is only a negligible influence on the free flow cross section of the Flat tubes (1). However, the denting that would otherwise be feared during the soldering process can be avoided in a simple manner.

Im Ausführungsbeispiel ist der Abstützsteg (5) durch zwei von gegenüberliegenden Wänden aus nach innen umgebogene Laschen ge­bildet. Wenngleich diese Ausführung fertigungstechnisch beson­ders einfach ist, so ist es natürlich auch denkbar,den Abstütz­steg beispielsweise durch Ausstanzen und Umbiegen einer Lasche nur von einer Wand aus zu bilden. Auch andere Möglichkeiten, wie beispielsweise die Anordnung mehrerer, über die Rohrbreite verteilter Abstützstege, sind denkbar. Solche Maßnahmen machen aber einen größeren Herstellungsaufwand erforderlich.In the exemplary embodiment, the support web (5) is formed by two tabs bent inwards from opposite walls. Although this embodiment is particularly simple in terms of production technology, it is of course also conceivable to form the support web, for example by punching out and bending a tab, only from one wall. Other possibilities are also conceivable, such as the arrangement of a plurality of support webs distributed over the pipe width. However, such measures require a greater manufacturing effort.

Claims (5)

1. Wärmetauscher, insbesondere Wasser/Luft-Kühler aus Alu­minium, bestehend aus mehreren Flachrohren, die mit ihren Sei­tenflächen parallel zueinander ausgerichtet und mit beiden En­den in entsprechenden Öffnungen von Rohrböden dicht gehalten sind, dadurch gekennzeichnet, daß im Bereich der Ebene der Rohrböden (3) mindestens ein zwischen den parallelen Rohrwänden (4) der Flachrohre (1) verlaufender Abstützsteg (5) vorgesehen ist, der durch Laschen (6, 6′) gebildet ist, die aus der Rohrwand (4) herausgestanzt und nach innen umgebogen sind.1. Heat exchanger, in particular water / air cooler made of aluminum, consisting of a plurality of flat tubes which are aligned with their side faces parallel to one another and are sealed with both ends in corresponding openings in tube sheets, characterized in that in the region of the plane of the tube sheets (3 ) at least one between the parallel tube walls (4) of the flat tubes (1) extending support web (5) is provided, which is formed by tabs (6, 6 ') which are punched out of the tube wall (4) and bent inwards. 2. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, daß ein Abstützsteg (5) jeweils durch zwei mit ihren freien Stirnseiten (6a, 6a′) aneinandergelegte Laschen (6, 6′) gebil­det ist, die jeweils aus den gegenüberliegenden Rohrwänden (4, 4′) ausgestanzt sind.2. Heat exchanger according to claim 1, characterized in that a support web (5) is formed by two with their free end faces (6a, 6a ') put together tabs (6, 6'), each of the opposite tube walls (4, 4th ') Are punched out. 3. Wärmetauscher nach Anspruch 2, dadurch gekennzeichnet, daß die Stirnseiten (1b) der Rohrenden (la) mindestens um die halbe Länge (a) des Abstützsteges (5) aus den Rohrböden (3) herausragen und daß die Laschen (6, 6′) jeweils von den Stirn­seiten (1b) ausgehend ausgestanzt sind.3. Heat exchanger according to claim 2, characterized in that the end faces (1b) of the tube ends (la) protrude at least by half the length (a) of the support web (5) from the tube sheets (3) and that the tabs (6, 6 ' ) are each punched out starting from the end faces (1b). 4. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Laschen (6, 6′) in der Mitte (M) der Flachrohre (1) angeordnet sind.4. Heat exchanger according to one of the preceding claims, characterized in that the tabs (6, 6 ') in the middle (M) of the flat tubes (1) are arranged. 5. Wärmetauscher nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Rohrenden (1a) mit den Rohrböden (3) und die freien Stirnseiten (6a, 6a′) der Laschen (6, 6′) mit­einander verlötet sind.5. Heat exchanger according to one of claims 1 to 4, characterized in that the tube ends (1a) with the tube sheets (3) and the free end faces (6a, 6a ') of the tabs (6, 6') are soldered together.
EP89100302A 1988-02-05 1989-01-10 Heat exchanger, especially an aluminium water-air cooler Expired - Lifetime EP0326813B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8801411U DE8801411U1 (en) 1988-02-05 1988-02-05 Heat exchangers, especially water/air coolers made of aluminum
DE8801411U 1988-02-05

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EP0326813A1 true EP0326813A1 (en) 1989-08-09
EP0326813B1 EP0326813B1 (en) 1991-05-02

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EP (1) EP0326813B1 (en)
DE (2) DE8801411U1 (en)
ES (1) ES2021886B3 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4129573A1 (en) * 1991-09-06 1993-03-11 Behr Gmbh & Co Heat exchanger, esp. refrigerating agent condenser - has flat tubes, with ends inserted into punched openings with raised edges, and soldered
DE9203734U1 (en) * 1992-03-19 1993-07-15 FAIST Automotive GmbH & Co. KG, 86381 Krumbach Thermally insulating laminate element
DE9309822U1 (en) * 1993-07-01 1994-11-10 Thermal-Werke, Wärme-, Kälte-, Klimatechnik GmbH, 68766 Hockenheim Aluminum water / air heat exchanger for motor vehicles
EP0660064A2 (en) * 1993-12-22 1995-06-28 Behr GmbH & Co. Joint for connecting a tube to an end plate in a heat exchanger
US5787973A (en) * 1995-05-30 1998-08-04 Sanden Corporation Heat exchanger
ES2153262A1 (en) * 1997-10-08 2001-02-16 Radiadores Ordonez S A Procedure for preventing the deformation of flat tubes in the manufacture of radiators for automobiles
CN110553533A (en) * 2019-09-11 2019-12-10 上海蓝滨石化设备有限责任公司 Connecting structure of porous flat tube and tube plate of aluminum air cooler

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8801411U1 (en) * 1988-02-05 1988-03-24 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Heat exchangers, especially water/air coolers made of aluminum
DE3900744A1 (en) * 1989-01-12 1990-07-26 Sueddeutsche Kuehler Behr HEAT EXCHANGER
DE4015830C2 (en) * 1990-05-17 2000-10-12 Behr Gmbh & Co Heat exchangers, especially water / air coolers
FR2750485B1 (en) * 1996-06-28 1998-09-04 Valeo Thermique Moteur Sa IMPROVED SEALING TUBE-COLLECTOR LINK FOR VEHICLE RADIATOR
JP2001248988A (en) * 2000-03-06 2001-09-14 Mitsubishi Heavy Ind Ltd Heat exchanger
DE102011052128A1 (en) * 2011-07-26 2013-01-31 Ventops UG ( haftungsbeschränkt) Radiator, in particular for electric motors or wind power generators, and method for producing a cooling module for a radiator

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FR2273222A1 (en) * 1974-05-30 1975-12-26 Chausson Usines Sa
GB2146421A (en) * 1983-09-09 1985-04-17 Ex Cell O Corp Heat exchangers
EP0176729A1 (en) * 1984-08-31 1986-04-09 Dirk Pietzcker Heat exchanger, and process and apparatus for its manufacture
DE8801411U1 (en) * 1988-02-05 1988-03-24 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Heat exchangers, especially water/air coolers made of aluminum

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FR2304049A1 (en) * 1975-03-14 1976-10-08 Chausson Usines Sa RADIATOR WITH MECHANICALLY ASSEMBLED ELEMENTS

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FR2273222A1 (en) * 1974-05-30 1975-12-26 Chausson Usines Sa
GB2146421A (en) * 1983-09-09 1985-04-17 Ex Cell O Corp Heat exchangers
EP0176729A1 (en) * 1984-08-31 1986-04-09 Dirk Pietzcker Heat exchanger, and process and apparatus for its manufacture
DE8801411U1 (en) * 1988-02-05 1988-03-24 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Heat exchangers, especially water/air coolers made of aluminum

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4129573A1 (en) * 1991-09-06 1993-03-11 Behr Gmbh & Co Heat exchanger, esp. refrigerating agent condenser - has flat tubes, with ends inserted into punched openings with raised edges, and soldered
DE9203734U1 (en) * 1992-03-19 1993-07-15 FAIST Automotive GmbH & Co. KG, 86381 Krumbach Thermally insulating laminate element
DE9309822U1 (en) * 1993-07-01 1994-11-10 Thermal-Werke, Wärme-, Kälte-, Klimatechnik GmbH, 68766 Hockenheim Aluminum water / air heat exchanger for motor vehicles
EP0660064A2 (en) * 1993-12-22 1995-06-28 Behr GmbH & Co. Joint for connecting a tube to an end plate in a heat exchanger
EP0660064A3 (en) * 1993-12-22 1995-11-29 Behr Gmbh & Co Joint for connecting a tube to an end plate in a heat exchanger.
US5749414A (en) * 1993-12-22 1998-05-12 Behr Gmbh & Co. Connection between tubes and tube bottom for a heat exchanger
US5787973A (en) * 1995-05-30 1998-08-04 Sanden Corporation Heat exchanger
ES2153262A1 (en) * 1997-10-08 2001-02-16 Radiadores Ordonez S A Procedure for preventing the deformation of flat tubes in the manufacture of radiators for automobiles
CN110553533A (en) * 2019-09-11 2019-12-10 上海蓝滨石化设备有限责任公司 Connecting structure of porous flat tube and tube plate of aluminum air cooler

Also Published As

Publication number Publication date
DE8801411U1 (en) 1988-03-24
EP0326813B1 (en) 1991-05-02
ES2021886B3 (en) 1991-11-16
DE58900097D1 (en) 1991-06-06

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