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EP0990868B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP0990868B1
EP0990868B1 EP99118524A EP99118524A EP0990868B1 EP 0990868 B1 EP0990868 B1 EP 0990868B1 EP 99118524 A EP99118524 A EP 99118524A EP 99118524 A EP99118524 A EP 99118524A EP 0990868 B1 EP0990868 B1 EP 0990868B1
Authority
EP
European Patent Office
Prior art keywords
tube
heat exchanger
flat tubes
soldering
exchanger 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.)
Expired - Lifetime
Application number
EP99118524A
Other languages
German (de)
French (fr)
Other versions
EP0990868A3 (en
EP0990868A2 (en
Inventor
Viktor Brost
Hans-Dieter Härtel
Michael Ehlers
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.)
Modine Manufacturing Co
Original Assignee
Modine Manufacturing Co
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
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Application filed by Modine Manufacturing Co filed Critical Modine Manufacturing Co
Publication of EP0990868A2 publication Critical patent/EP0990868A2/en
Publication of EP0990868A3 publication Critical patent/EP0990868A3/en
Application granted granted Critical
Publication of EP0990868B1 publication Critical patent/EP0990868B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/04Arrangements for sealing elements into header boxes or end plates
    • F28F9/16Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/182Arrangements 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0082Charged air coolers

Definitions

  • the invention relates to a heat exchanger with the features in the preamble of claim 1.
  • Heat exchangers equipped with these features are known from EP 798 531 known. Because the pressure loss of the heat-exchanging media is always low in this document, the passages are advantageously to the heat exchanger network been ordered. This ensures that the ends of the Pipes do not have to have an overhang that extends into the collecting space.
  • the cross section of the passages has an inward curvature, to facilitate the insertion of the pipe ends.
  • the disadvantage is that the ends The tubes need to be widened in a tulip-shaped manner due to the bulge to enlarge the reduced connecting area with the passages and to achieve a tight metallic connection by soldering.
  • the Expanding requires an additional step.
  • the individual tube ends are down to the level of the tube sheet level or even have been inserted into the passages up to this level, whereby the individual pipes with the same size of the heat exchanger may be slightly longer need, what with a variety of such pipes as additional weight and additional costs.
  • the object of the invention is to further improve the stated state the technology regarding the metallic connection between the pipes and the tube sheets in a heat exchanger, which is the preamble of the claim 1 corresponds.
  • the pipe ends the level of Fall below the tube sheet surface and with the passages a circumferential one Form the contact surface on which there is a soldering gap between the flat tube and Threading connects.
  • the pipe ends are preferably not widened or drawn in, although after the inventive teaching these variants are also possible.
  • soldering gaps on both sides cause the solder to adhere during the soldering process stuck in these soldering gaps and thus a perfect, tight solder connection arises.
  • the heat exchangers to be soldered no longer have to be in one be placed in the soldering oven such that the solder in the joints can flow.
  • the adhesive forces also hold the solder against gravity, i.e.
  • the location of the heat exchanger to be soldered is irrelevant, which means essential Simplifications of the manufacturing process are possible.
  • connection area is significantly smaller than in the prior art, solder joints can be produced according to the teaching of the invention, which in each Relationship meet the requirements.
  • the tubes are designed as flat tubes, with the same positive effects also occur with all other cross-sectional shapes of the pipes.
  • the tube ends are preferably located approximately around the thickness of the tube sheet below the one tube sheet surface. So that is occurring Pressure drop is extremely low.
  • the opening angle of the also circumferential, acute-angled soldering gaps lies in Preferred range from 10 to 25 °, because it has been found that at this opening angle with a view to the adhesive forces to achieve the best results are.
  • the opening angle of the two soldering gaps can be different or equally large opening angles can be provided on both soldering gaps become.
  • the circumferential connection surface should have a width that is approximately in Thickness range of the tube sheets is or is larger, which is however significantly smaller than in EP 798 531.
  • Heat exchangers of the generic type can be referred to as mass products where there are already supposedly minor improvements or Differences from the known prior art lead to considerable advantages.
  • the heat exchanger consists of a plurality of tubes 1, the ends 2 in Openings 4 of the tube sheets 3 arranged and liquid-tight with the passages 5 are connected by soldering. There was only one in Figs Tube 1 shown because all tubes 1 of the heat exchanger in the same way are fastened in the openings 4 of the tube sheets 3.
  • the tubes 1 are flat tubes. Below the tube sheet 3 is the cooling network, usually consisting from the aforementioned plurality of flat tubes 1 and between the flat tubes 1 arranged slats or corrugated ribs, not shown. Through the corrugated ribs cooling air usually flows through and 1 cooling water within the flat tubes or air, for example charge air, which is to be cooled.
  • the pipe ends 2 are clear been arranged below the tube sheet surface 6.
  • the distance between the tube ends 2 and the tube sheet surface 6 equal to the thickness d of the tube sheet 3.
  • the same dimension has the width b of the contact surface -or Connection surface 7.
  • the opening angle ⁇ is above and below 20 °. Only the lower opening angle ⁇ was drawn.
  • the tube sheet 3 and / or the tubes 1 are made of solder-coated aluminum Service. But it could also be another solder-coated, metallic Trade material.
  • solder layer melts and is in the soldering gaps by adhesive forces 8 drawn in or adheres to the soldering gaps 8. This will make the interface 7 slightly enlarged, because depending on how much solder is available, fill the soldering gaps 8 with the same and ensure a perfect, tight and durable solder joint.
  • FIG. 2 is a view from the long side of the flat tube 1.
  • the end 2 of the flat tube 1 has been slightly sculpted, but the upper and lower solder gap 8 with its described advantages is retained.
  • the tulip which does not require an additional work step, because it is necessary for network installation is carried out at the same time that the tube sheets are being pulled up
  • Advantages that the cohesion of the parts before soldering is improved and that the solder gap 8 is narrower, which further improves the adhesion effect. It will also depend on the degree of deformation of the passages 5, whether you choose this Embodiment decides, or the one from Fig. 1 chooses.
  • Fig. 3 shows the basic structure of an intercooler and only a part thereof.
  • Flat tubes 1 and folded fins 9 form a heat exchanger network together.
  • the hot charge air flows through the flat tubes 1, as by means Flow arrows has been indicated.
  • the cooling air flows freely through the Slats 9 occupied spaces.
  • the heat exchanger network is replaced by a Side part 10 limited, usually at the opposite ends too is connected to the tube sheets 3.
  • the tube sheet 3 has on the peripheral edge a U-shaped deformation in which a seal 11 is located.
  • In this u-shaped Forming is a so-called air box 12 with its in the circumferential Forming appropriate edge termination used and by bending individual tabs of the U-shaped forming attached sealing.
  • the hot one Charge air enters the air box 12 through the charge air inlet 13 and is distributed on the flat tubes 1. Because the flat tubes 1 are slightly below the level of the Tube bottom 3 ends, the pressure loss of the charge air remains very low.

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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)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The cross-section of the passages is arched inwards. Through the tubes and around them different heat-exchanging media flow. The tube ends (2) extend as far as below the level of the tube base surface (6) and with the passages (5) form an all-round contact surface (7), to which connect on both sides a solder gap (8) between the tube (1) and the passage (5).

Description

Die Erfindung betrifft einen Wärmetauscher mit den Merkmalen im Oberbegriff des Anspruchs 1.The invention relates to a heat exchanger with the features in the preamble of claim 1.

Mit diesen Merkmalen ausgestattete Wärmetauscher sind aus dem EP 798 531 bekannt. Weil der Druckverlust der wärmeaustauschenden Medien stets gering sein soll, sind in diesem Dokument die Durchzüge vorteilhafterweise zum Wärmetauschernetz hin angeordnet worden. Dadurch wird erreicht, daß die Enden der Rohre keinen Überstand haben müssen, der sich in den Sammelraum hinein erstreckt. Der Querschnitt der Durchzüge besitzt eine nach innen weisende Wölbung, um das Einführen der Rohrenden zu erleichtern. Nachteilig ist, daß die Enden der Rohre tulpenförmig aufgeweitet werden müssen, um die durch die Wölbung reduzierte Verbindungsfläche mit den Durchzügen wieder zu vergrößern und um dadurch eine dichte metallische Verbindung durch Löten zu erreichen. Das Aufweiten erfordert einen zusätzlichen Arbeitsgang.Heat exchangers equipped with these features are known from EP 798 531 known. Because the pressure loss of the heat-exchanging media is always low in this document, the passages are advantageously to the heat exchanger network been ordered. This ensures that the ends of the Pipes do not have to have an overhang that extends into the collecting space. The cross section of the passages has an inward curvature, to facilitate the insertion of the pipe ends. The disadvantage is that the ends The tubes need to be widened in a tulip-shaped manner due to the bulge to enlarge the reduced connecting area with the passages and to achieve a tight metallic connection by soldering. The Expanding requires an additional step.

Die einzelnen Rohrenden sind bis auf das Niveau der Rohrbodenebene oder sogar bis über dieses Niveau in die Durchzüge hineingesteckt worden, wodurch die einzelnen Rohre bei gleicher Baugröße des Wärmetauschers etwas länger sein müssen, was sich bei einer Vielzahl solcher Rohre als zusätzliches Gewicht und zusätzliche Kosten niederschlägt.The individual tube ends are down to the level of the tube sheet level or even have been inserted into the passages up to this level, whereby the individual pipes with the same size of the heat exchanger may be slightly longer need, what with a variety of such pipes as additional weight and additional costs.

In der nicht vorveröffentlichten deutschen Patentanmeldung Nr. 197 57 034 A1 sind die zum Wärmetauschernetz weisenden Durchzüge nicht gewölbt sondern zylindrisch ausgebildet worden, wodurch das Einführen der Rohrenden schwieriger wird.In the unpublished German patent application No. 197 57 034 A1 the passages pointing to the heat exchanger network are not curved but rather been cylindrical, thereby introducing the pipe ends becomes more difficult.

Die Aufgabe der Erfindung ist die weitere Verbesserung des angegebenen Standes der Technik hinsichtlich der metallischen Verbindung zwischen den Rohren und den Rohrböden bei einem Wärmetauscher, der dem Oberbegriff des Anspruchs 1 entspricht.The object of the invention is to further improve the stated state the technology regarding the metallic connection between the pipes and the tube sheets in a heat exchanger, which is the preamble of the claim 1 corresponds.

Erfindungsgemäß ist dazu vorgesehen, daß die Rohrenden das Niveau der Rohrbodenoberfläche unterschreiten und mit den Durchzügen eine umlaufende Kontaktfläche ausbilden, an die sich beidseitig ein Lötspalt zwischen Flachrohr und Durchzug anschließt.According to the invention it is provided that the pipe ends the level of Fall below the tube sheet surface and with the passages a circumferential one Form the contact surface on which there is a soldering gap between the flat tube and Threading connects.

Bevorzugt sind die Rohrenden nicht aufgeweitet oder eingezogen, obwohl nach der erfinderischen Lehre auch diese Varianten möglich sind. The pipe ends are preferably not widened or drawn in, although after the inventive teaching these variants are also possible.

Die beidseitigen Lötspalte führen dazu, daß das Lot beim Lötprozeß durch Adhäsion in diesen Lötspalten anhaftet und dadurch eine perfekte, dichte Lötverbindung entsteht. Die zu lötenden Wärmetauscher müssen nicht mehr in einer solchen Position in den Lötofen gebracht werden, daß das Lot in die Fugen fließen kann. Die Adhäsionskräfte halten das Lot auch entgegen der Schwerkraft, d.h. die Lage der zu lötenden Wärmetauscher ist unerheblich, wodurch wesentliche Vereinfachungen des Herstellungsprozesses möglich sind.The soldering gaps on both sides cause the solder to adhere during the soldering process stuck in these soldering gaps and thus a perfect, tight solder connection arises. The heat exchangers to be soldered no longer have to be in one be placed in the soldering oven such that the solder in the joints can flow. The adhesive forces also hold the solder against gravity, i.e. The location of the heat exchanger to be soldered is irrelevant, which means essential Simplifications of the manufacturing process are possible.

Obwohl die Verbindungsfläche deutlich kleiner ist, als beim Stand der Technik, sind nach der erfindungsgemäßen Lehre Lötverbindungen herstellbar, die in jeder Beziehung den Forderungen entsprechen.Although the connection area is significantly smaller than in the prior art, solder joints can be produced according to the teaching of the invention, which in each Relationship meet the requirements.

Die Rohre sind als Flachrohre ausgebildet, wobei die gleichen positiven Wirkungen auch bei allen anderen Querschnittsformen der Rohre auftreten.The tubes are designed as flat tubes, with the same positive effects also occur with all other cross-sectional shapes of the pipes.

Weiterhin befinden sich die Rohrenden bevorzugt etwa um die Dicke des Rohrbodens unterhalb der einen Rohrbodenoberfläche. Somit ist der auftretende Druckverlust denkbar gering.Furthermore, the tube ends are preferably located approximately around the thickness of the tube sheet below the one tube sheet surface. So that is occurring Pressure drop is extremely low.

Der Öffnungswinkel der ebenfalls umlaufenden, spitzwinkligen Lötspalte liegt im Vorzugsbereich von 10 bis 25°, weil sich herausgestellt hat, daß bei diesem Öffnungswinkel mit Blick auf die Adhäsionskräfte, die besten Resultate zu erreichen sind. Dabei kann der Öffnungswinkel der beiden Lötspalte unterschiedlich sein oder es können gleich große Öffnungswinkel an beiden Lötspalten vorgesehen werden. Die umlaufende Verbindungsfläche sollte eine Breite haben, die etwa im Dickenbereich der Rohrböden liegt oder größer ist, die jedoch deutlich kleiner als bei dem EP 798 531 ist.The opening angle of the also circumferential, acute-angled soldering gaps lies in Preferred range from 10 to 25 °, because it has been found that at this opening angle with a view to the adhesive forces to achieve the best results are. The opening angle of the two soldering gaps can be different or equally large opening angles can be provided on both soldering gaps become. The circumferential connection surface should have a width that is approximately in Thickness range of the tube sheets is or is larger, which is however significantly smaller than in EP 798 531.

Wärmetauscher der gattungsgemäßen Art können als Massenprodukte bezeichnet werden, bei denen bereits vermeintlich geringfügige Verbesserungen bzw. Unterschiede zum bekannten Stand der Technik zu erheblichen Vorteilen führen.Heat exchangers of the generic type can be referred to as mass products where there are already supposedly minor improvements or Differences from the known prior art lead to considerable advantages.

Gerade die Verbindung zwischen Rohren und Rohrböden war seit jeher Gegenstand von umfangreichen Untersuchungen und vielen kleinen Verbesserungsschritten, wie durch eine unglaublich hohe Zahl von Veröffentlichungen belegt werden kann.The connection between pipes and tube sheets has always been an issue of extensive investigations and many small improvement steps, as evidenced by an incredibly high number of publications can be.

Die Erfindung wird nachfolgend anhand zweier Ausführungsbeispiele unter Bezugnahme auf die beiliegenden Figuren beschrieben.

  • Fig. 1 zeigt die Verbindung Rohr/Rohrboden einer ersten Ausführungsform
  • Fig. 2 zeigt eine der Fig. 1 ähnliche Ausführungsform
  • Fig. 3 zeigt den Ausschniit aus einem Wärmetauscher
  • The invention is described below using two exemplary embodiments with reference to the accompanying figures.
  • Fig. 1 shows the tube / tube sheet connection of a first embodiment
  • Fig. 2 shows an embodiment similar to Fig. 1
  • Fig. 3 shows the section from a heat exchanger
  • Der Wärmetauscher besteht aus einer Vielzahl von Rohren 1, deren Enden 2 in Öffnungen 4 der Rohrböden 3 angeordnet und mit den Durchzügen 5 flüssigkeitsdicht durch Löten verbunden sind. Es wurde in den Fig. 1 und 2 nur ein einziges Rohr 1 dargestellt, weil sämtliche Rohre 1 des Wärmetauschers in gleicher Weise in den Öffnungen 4 der Rohrböden 3 befestigt sind. Die Rohre 1 sind Flachrohre. Unterhalb des Rohrbodens 3 befindet sich das Kühlnetz, gewöhnlich bestehend aus der genannten Vielzahl von Flachrohren 1 und zwischen den Flachrohren 1 angeordneten nicht gezeigten Lamellen bzw. Wellrippen. Durch die Wellrippen hindurch strömt gewöhnlich Kühlluft und innerhalb der Flachrohre 1 Kühlwasser oder Luft, beispielsweise Ladeluft, die zu kühlen ist. Die Rohrenden 2 sind deutlich unterhalb der Rohrbodenoberfläche 6 angeordnet worden. Im gezeigten Ausführungsbeispiel ist der Abstand der Rohrenden 2 von der Rohrbodenoberfläche 6 gleich der Dicke d des Rohrbodens 3. Das gleiche Maß hat die Breite b der Kontaktfläche-oder Verbindungsfläche 7. An die Verbindungsfläche 7 schließt sich nach oben und nach unten je ein Lötspalt 8 an, der, genau wie die Verbindungsfläche 7 umlaufend ausgebildet ist. Das bedeutet, er ist um den gesamten Umfang des Rohres 1 in gleicher Weise ausgebildet. Der Öffnungswinkel α beträgt oben und unten 20°. Es wurde nur der untere Öffnungswinkel α eingezeichnet. Der Rohrboden 3 und /oder die Rohre 1 sind aus lotbeschichtetem Aluminium hergestellt worden. Es könnte sich aber auch um einen anderen lotbeschichteten, metallischen Werkstoff handeln. Wenn die zum Löten erforderliche Temperatur erreicht ist, schmilzt die Lotschicht und wird durch Adhäsionskräfte in die Lötspalten 8 hineingezogen bzw. haftet in den Lötspalten 8 an. Dadurch wird die Verbindungsfläche 7 etwas vergrößert, denn je nach dem wieviel Lot vorhanden ist, füllen sich die Lötspalten 8 mit demselben auf und sorgen für eine perfekte, dichte und haltbare Lötverbindung.The heat exchanger consists of a plurality of tubes 1, the ends 2 in Openings 4 of the tube sheets 3 arranged and liquid-tight with the passages 5 are connected by soldering. There was only one in Figs Tube 1 shown because all tubes 1 of the heat exchanger in the same way are fastened in the openings 4 of the tube sheets 3. The tubes 1 are flat tubes. Below the tube sheet 3 is the cooling network, usually consisting from the aforementioned plurality of flat tubes 1 and between the flat tubes 1 arranged slats or corrugated ribs, not shown. Through the corrugated ribs cooling air usually flows through and 1 cooling water within the flat tubes or air, for example charge air, which is to be cooled. The pipe ends 2 are clear been arranged below the tube sheet surface 6. In the embodiment shown is the distance between the tube ends 2 and the tube sheet surface 6 equal to the thickness d of the tube sheet 3. The same dimension has the width b of the contact surface -or Connection surface 7. Connects to the connection surface 7 upwards and downwards one soldering gap 8 each, which, just like the connecting surface 7 is formed all around. That means it's around the entire perimeter of the tube 1 formed in the same way. The opening angle α is above and below 20 °. Only the lower opening angle α was drawn. The The tube sheet 3 and / or the tubes 1 are made of solder-coated aluminum Service. But it could also be another solder-coated, metallic Trade material. When the temperature required for soldering is reached is, the solder layer melts and is in the soldering gaps by adhesive forces 8 drawn in or adheres to the soldering gaps 8. This will make the interface 7 slightly enlarged, because depending on how much solder is available, fill the soldering gaps 8 with the same and ensure a perfect, tight and durable solder joint.

    Im Gegensatz zu Fig. 1, die das Flachrohr 1 von der Schmalseite zeigt, ist die Fig. 2 eine Ansicht von der Längsseite des Flachrohres 1. Das Ende 2 des Flachrohre 1 ist geringfügig aufgetulpt worden, wobei jedoch auf jeden Fall der obere und untere Lötspalt 8 mit seinen beschriebenen Vorteilen erhalten bleibt. Das Auftulpen, wozu kein zusätzlicher Arbeitsgang erforderlich ist, weil es bei der Netzmontage zeitgleich mit dem Aufziehen der Rohrböden durchgeführt wird, hat die Vorteile, daß der Zusammenhalt der Teile vor dem Löten verbessert ist und daß der Lötspalt 8 enger ist, was die Ahäsionswirkung weiter verbessert. Es wird auch von dem Verformungsgrad der Durchzüge 5 abhängen, ob man sich für diese Ausführungsform entscheidet, oder diejenige aus Fig. 1 wählt.In contrast to FIG. 1, which shows the flat tube 1 from the narrow side, FIG. 2 is a view from the long side of the flat tube 1. The end 2 of the flat tube 1 has been slightly sculpted, but the upper and lower solder gap 8 with its described advantages is retained. The tulip, which does not require an additional work step, because it is necessary for network installation is carried out at the same time that the tube sheets are being pulled up Advantages that the cohesion of the parts before soldering is improved and that the solder gap 8 is narrower, which further improves the adhesion effect. It will also depend on the degree of deformation of the passages 5, whether you choose this Embodiment decides, or the one from Fig. 1 chooses.

    Fig. 3 zeigt den prinzipiellen Aufbau eines Ladeluftkühlers und zwar nur einen Teil desselben. Flachrohre 1 und gefaltete Lamellen 9 sind zu einem Wärmetauschernetz zusammengefügt. Die heiße Ladeluft strömt durch die Flachrohre 1, wie mittels Strömungspfeilen angedeutet worden ist. Die Kühlluft strömt frei durch die mit Lamellen 9 belegten Zwischenräume. Das Wärmetauschernetz wird durch ein Seitenteil 10 begrenzt, das gewöhnlich an den gegenüberliegenden Enden auch mit den Rohrböden 3 verbunden ist. Der Rohrboden 3 hat am umlaufenden Rand eine u-förmige Umformung, in der sich eine Dichtung 11 befindet. In diese u-förmige Umformung wird ein sogenannter Luftkasten 12 mit seinem in die umlaufende Umformung passenden Randabschluß eingesetzt und mittels Umbiegen einzelner Laschen der u-förmigen Umformung abdichtend befestigt. Die heiße Ladeluft tritt durch den Ladelufteintritt 13 in den Luftkasten 12 ein und verteilt sich auf die Flachrohre 1. Weil die Flachrohre 1 etwas unterhalb des Niveaus des Rohrbodens 3 enden, bleibt der Druckverlust der Ladeluft sehr gering.Fig. 3 shows the basic structure of an intercooler and only a part thereof. Flat tubes 1 and folded fins 9 form a heat exchanger network together. The hot charge air flows through the flat tubes 1, as by means Flow arrows has been indicated. The cooling air flows freely through the Slats 9 occupied spaces. The heat exchanger network is replaced by a Side part 10 limited, usually at the opposite ends too is connected to the tube sheets 3. The tube sheet 3 has on the peripheral edge a U-shaped deformation in which a seal 11 is located. In this u-shaped Forming is a so-called air box 12 with its in the circumferential Forming appropriate edge termination used and by bending individual tabs of the U-shaped forming attached sealing. The hot one Charge air enters the air box 12 through the charge air inlet 13 and is distributed on the flat tubes 1. Because the flat tubes 1 are slightly below the level of the Tube bottom 3 ends, the pressure loss of the charge air remains very low.

    Claims (6)

    1. Heat exchanger with a multiplicity of flat tubes (1), the ends (2) of which are inserted into orifices (4), designed as rim holes (5), in tube plates (3), the rim holes (5) pointing towards a heat-exchanger network which consists of the flat tubes (1) and of corrugated ribs (9), the rim holes (5) having a cross section curved towards the flat-tube ends (2), and the ends (2) being metallically connected, liquid-tight, to the rim holes (5), different heat-exchanging media flowing through the flat tubes (1) and around the flat tubes (1), characterized in that the tube ends (2) fall short of the level of the tube-plate surface (6) and, together with the rim holes (5), form a peripheral contact surface (7), adjacent to which there is on both sides a soldering gap (8) between the flat tube (1) and the rim hole (5).
    2. Heat exchanger according to Claim 1, characterized in that the tube ends (2) fall short of the tube-plate surface (6) preferably by the thickness (d) of the tube plate (3).
    3. Heat exchanger according to Claim 1, characterized in that the soldering gaps (8) have approximately an opening angle (α) of 10 to 25° and the two soldering gaps (8) possess identical or different opening angles (α).
    4. Heat exchanger according to one of the preceding claims, characterized in that the cross section of the flat tubes (1) at the tube ends (2) is identical to the remaining tube cross section.
    5. Heat exchanger according to one of the preceding Claims 1 to 3, characterized in that the tube ends (2) are flared, whilst at the same time maintaining the soldering gap (8).
    6. Heat exchanger according to one of the preceding claims, characterized in that the peripheral contact or connection surface (7) has a width (b) which corresponds approximately to the thickness (d) of the tube plate (3).
    EP99118524A 1998-09-30 1999-09-18 Heat exchanger Expired - Lifetime EP0990868B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19844848A DE19844848A1 (en) 1998-09-30 1998-09-30 Heat exchanger
    DE19844848 1998-09-30

    Publications (3)

    Publication Number Publication Date
    EP0990868A2 EP0990868A2 (en) 2000-04-05
    EP0990868A3 EP0990868A3 (en) 2000-07-26
    EP0990868B1 true EP0990868B1 (en) 2002-08-28

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    ID=7882797

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99118524A Expired - Lifetime EP0990868B1 (en) 1998-09-30 1999-09-18 Heat exchanger

    Country Status (4)

    Country Link
    EP (1) EP0990868B1 (en)
    AT (1) ATE223028T1 (en)
    DE (2) DE19844848A1 (en)
    ES (1) ES2182441T3 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102009022983A1 (en) 2008-06-10 2009-12-17 Behr Gmbh & Co. Kg heat exchangers
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    DE102009022983A1 (en) 2008-06-10 2009-12-17 Behr Gmbh & Co. Kg heat exchangers
    WO2011120977A2 (en) 2010-03-31 2011-10-06 Valeo Systemes Thermiques Heat exchanger having enhanced performance
    CN102933930A (en) * 2010-03-31 2013-02-13 法雷奥热系统公司 Heat exchanger having enhanced performance
    US9366487B2 (en) 2010-03-31 2016-06-14 Valeo Systemes Thermiques Heat exchanger having enhanced performance
    CN102933930B (en) * 2010-03-31 2016-08-24 法雷奥热系统公司 There is the heat exchanger strengthening performance

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    DE19844848A1 (en) 2000-04-06
    ATE223028T1 (en) 2002-09-15
    DE59902453D1 (en) 2002-10-02
    EP0990868A3 (en) 2000-07-26
    EP0990868A2 (en) 2000-04-05
    ES2182441T3 (en) 2003-03-01

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