EP1118830A2 - Device for joining two heat exchangers - Google Patents

Device for joining two heat exchangers Download PDF

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Publication number
EP1118830A2
EP1118830A2 EP01100353A EP01100353A EP1118830A2 EP 1118830 A2 EP1118830 A2 EP 1118830A2 EP 01100353 A EP01100353 A EP 01100353A EP 01100353 A EP01100353 A EP 01100353A EP 1118830 A2 EP1118830 A2 EP 1118830A2
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EP
European Patent Office
Prior art keywords
heat exchanger
struts
holder
supports
leg
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01100353A
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German (de)
French (fr)
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EP1118830B1 (en
EP1118830A3 (en
Inventor
Rainer Mangold
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Modine Manufacturing Co
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Modine Manufacturing Co
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Publication date
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Publication of EP1118830A2 publication Critical patent/EP1118830A2/en
Publication of EP1118830A3 publication Critical patent/EP1118830A3/en
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Publication of EP1118830B1 publication Critical patent/EP1118830B1/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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • F28F9/002—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core with fastening means for other structures
    • 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
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435—Combination of units extending one behind the other
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0082—Charged air coolers
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0084—Condensers

Definitions

  • the invention relates to a device for connecting two heat exchangers for motor vehicles, consisting of lower supports on the header of the first heat exchanger, in which the lower struts of the second heat exchanger engage and upper spring clips, one leg of which the upper struts of the second heat exchanger after pressing the second Extends heat exchanger to the first heat exchanger in order to hold both heat exchangers elastically together.
  • the device is known from DE 198 57 508 A1, from which the following invention is based.
  • the advantage of the known device is that the assembly and disassembly of the heat exchangers can be carried out easily and quickly, namely by inserting the lower struts of the second heat exchanger into the lower supports of the first heat exchanger and pressing the upper struts of the second heat exchanger until they snap into the upper spring clip.
  • the spring clip used in the known document is a part to be produced specifically for this purpose, which is supported with its one leg in a sleeve formed on the header of one heat exchanger and with the other leg a vertical force on the upper and lower struts of the other heat exchanger, or exercises on the cooling network of this heat exchanger itself.
  • the cooling network of the heat exchangers consisting of relatively thin-walled flat tubes and corrugated fins, is therefore subject to a certain amount of tension, which is disadvantageous.
  • Further documents in which spring clips are used as fastening elements for heat exchangers are DE -OS- 2018459, EP 0 046 566 B1, DE - AS 25 57 967, DE 3814007 C1, DE 198 57 512 A1 and DE 198 57 494 A1.
  • the large number of publications makes it clear that spring clips are quite widespread as fastening elements for heat exchangers.
  • the object of the invention is to design the device so that vertical clamping forces on the cooling network can be avoided without the simple assembly and disassembly being significantly impaired.
  • the lower supports on the header of the first heat exchanger hold the lower struts attached to the header of the second heat exchanger in their longitudinal direction under a torsional stress in the elastic range and the upper struts attached to the header of the second heat exchanger and those on the header of the first heat exchanger attached holder each surrounded by two legs of the spring clip and held together so that they maintain the torsional stress in the struts.
  • Vertical bracing forces on the cooling network of the heat exchangers are avoided because the bracing forces are absorbed by the struts under torsional tension and by the spring clips, the spring force of which maintains the torsional tension in the struts.
  • the second heat exchanger with its lower struts is first inserted into the lower U-shaped supports, the second heat exchanger being slightly inclined to the first heat exchanger. Then the second heat exchanger is pressed against the first heat exchanger at the top, as a result of which both heat exchangers are approximately parallel to one another and the upper struts rest on the holders, in order then to be embraced by means of the spring clips.
  • the lower struts experience a torsional tension which is maintained by the connection of the upper struts and holder by means of the spring clips.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Clamps And Clips (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The connector comprises lower stays (10u) of the second heat exchanger (2) engaging in lower support members (6) on the collecting box (5) of the first heat exchanger (1). These lower support members secure the stays under torsional stress in the elastic region. Upper stays (10o) fixed on the collecting box (9) of the second heat exchanger and holders (7) fixed on the box of the first exchanger are each surrounded and secured by the two arms (14a, 14b) of a spring clip (14) so that the torsion stresses remain in the stays to prevent vertical tensions from acting on the coolant network of the heat exchanger.

Description

Die Erfindung betrifft eine Vorrichtung zur Verbindung zweier Wärmetauscher für Kraftfahrzeuge, bestehend aus unteren Auflagern am Sammelkasten des ersten Wärmetauschers, in die die unteren Streben des zweiten Wärmetauschers eingreifen und aus oberen Federspangen, deren einer Schenkel die oberen Streben des zweiten Wärmetauschers nach dem Andrücken des zweiten Wärmetauschers an den ersten Wärmetauscher umgreift, um beide Wärmetauscher elastisch aneinander festzuhalten.
Die Vorrichtung ist aus DE 198 57 508 A1 bekannt, von der die nachfolgende Erfindung ausgeht. Der Vorteil der bekannten Vorrichtung ist darin zu sehen, daß die Montage und Demontage der Wärmetauscher einfach und schnell erfolgen kann, nämlich durch Einsetzen der unteren Streben des zweiten Wärmetauschers in die unteren Auflager des ersten Wärmetauschers und Andrücken der oberen Streben des zweiten Wärmetauschers, bis sie in der oberen Federspange einrasten. Die in dem bekannten Dokument verwendete Federspange ist ein speziell für den Zweck anzufertigendes Teil, das mit seinem einen Schenkel in einer am Sammelkasten des einen Wärmetauschers angeformten Hülse gelagert ist und mit dem anderen Schenkel eine vertikale Kraft auf die oberen und unteren Streben des anderen Wärmetauschers, bzw. auf das Kühlnetz dieses Wärmetauschers selbst ausübt. Das Kühlnetz der Wärmetauscher, bestehend aus relativ dünnwandigen Flachrohren und Wellrippen, steht deshalb unter einen gewissen Verspannung, was nachteilig ist.
Weitere Dokumente, in denen Federspangen als Befestigungselemente für Wärmetauscher verwendet werden sind DE -OS- 2018459, EP 0 046 566 B1, DE - AS 25 57 967, DE 3814007 C1, DE 198 57 512 A1 und DE 198 57 494 A1. Die Vielzahl von Veröffentlichungen macht deutlich, daß Federspangen als Befestigungselemente für Wärmetauscher recht weit verbreitet sind.
Die Aufgabe der Erfindung besteht darin, die Vorrichtung so auszubilden, daß vertikale Verspannkräfte auf das Kühlnetz vermieden werden können, ohne daß die einfache Montage und Demontage wesentlich beeinträchtigt wird.
Erfindungsgemäß ist vorgesehen, daß die unteren Auflager am Sammelkasten des ersten Wärmetauschers die unteren am Sammelkasten des zweiten Wärmetauschers befestigten Streben in ihrer Längsrichtung unter einer Torsionsspannung im elastischen Bereich stehend festhalten und die oberen am Sammelkasten des zweiten Wärmetauschers befestigten Streben und die am Sammelkasten des ersten Wärmetauschers befestigten Halter jeweils von beiden Schenkeln der Federspange derart umfaßt und zusammengehalten sind, daß sie die Torsionsspannung in den Streben aufrechterhalten.
Vertikale Verspannkräfte auf das Kühlnetz der Wärmetauscher werden vermieden, weil die Verspannkräfte durch die unter Torsionsspannung stehenden Streben aufgenommen werden und durch die Federspangen, deren Federkraft die Torsionsspannung in den Streben aufrechterhält. Um beide Wärmetauscher zu verbinden, wird zunächst der zweite Wärmetauscher mit seinen unteren Streben in die unteren U - förmigen Auflager eingesetzt, wobei der zweite Wärmetauscher eine leichte Schräglage zum ersten Wärmetauscher aufweist. Dann wird der zweite Wärmetauscher an den ersten Wärmetauscher oben herangedrückt, wodurch beide Wärmetauscher etwa parallel zueinander liegen und die oberen Streben an den Haltern anliegen, um dann mittels der Federspangen umfaßt zu werden. Durch das Andrücken des zweiten Wärmetauschers an den ersten Wärmetauscher erfahren die unteren Streben eine Torsionsspannung, die durch die Verbindung der oberen Streben und Halter mittels der Federspangen aufrechterhalten wird. Die Streben sind praktisch in den U - förmigen Auflagern eingeklemmt, wobei jedoch die Beweglichkeit für durch Temperaturänderung bewirkte Materialdehnungen erhalten bleibt. Auch zwischen Schlitz und Stift (Anspruch 2) ist ausreichend Spielraum vorhanden, damit die Wärmeausdehnung der Wärmeaustauscher ermöglicht wird. Diese Art der Befestigung erfüllt auch hinsichtlich des Aufwandes für Montage und Demontage die gestellte Aufgabe, denn sie ist äußerst einfach auszuführen, wie aus der vorstehenden Beschreibung zu entnehmen ist.The invention relates to a device for connecting two heat exchangers for motor vehicles, consisting of lower supports on the header of the first heat exchanger, in which the lower struts of the second heat exchanger engage and upper spring clips, one leg of which the upper struts of the second heat exchanger after pressing the second Extends heat exchanger to the first heat exchanger in order to hold both heat exchangers elastically together.
The device is known from DE 198 57 508 A1, from which the following invention is based. The advantage of the known device is that the assembly and disassembly of the heat exchangers can be carried out easily and quickly, namely by inserting the lower struts of the second heat exchanger into the lower supports of the first heat exchanger and pressing the upper struts of the second heat exchanger until they snap into the upper spring clip. The spring clip used in the known document is a part to be produced specifically for this purpose, which is supported with its one leg in a sleeve formed on the header of one heat exchanger and with the other leg a vertical force on the upper and lower struts of the other heat exchanger, or exercises on the cooling network of this heat exchanger itself. The cooling network of the heat exchangers, consisting of relatively thin-walled flat tubes and corrugated fins, is therefore subject to a certain amount of tension, which is disadvantageous.
Further documents in which spring clips are used as fastening elements for heat exchangers are DE -OS- 2018459, EP 0 046 566 B1, DE - AS 25 57 967, DE 3814007 C1, DE 198 57 512 A1 and DE 198 57 494 A1. The large number of publications makes it clear that spring clips are quite widespread as fastening elements for heat exchangers.
The object of the invention is to design the device so that vertical clamping forces on the cooling network can be avoided without the simple assembly and disassembly being significantly impaired.
According to the invention it is provided that the lower supports on the header of the first heat exchanger hold the lower struts attached to the header of the second heat exchanger in their longitudinal direction under a torsional stress in the elastic range and the upper struts attached to the header of the second heat exchanger and those on the header of the first heat exchanger attached holder each surrounded by two legs of the spring clip and held together so that they maintain the torsional stress in the struts.
Vertical bracing forces on the cooling network of the heat exchangers are avoided because the bracing forces are absorbed by the struts under torsional tension and by the spring clips, the spring force of which maintains the torsional tension in the struts. In order to connect the two heat exchangers, the second heat exchanger with its lower struts is first inserted into the lower U-shaped supports, the second heat exchanger being slightly inclined to the first heat exchanger. Then the second heat exchanger is pressed against the first heat exchanger at the top, as a result of which both heat exchangers are approximately parallel to one another and the upper struts rest on the holders, in order then to be embraced by means of the spring clips. By pressing the second heat exchanger onto the first heat exchanger, the lower struts experience a torsional tension which is maintained by the connection of the upper struts and holder by means of the spring clips. The struts are practically clamped in the U-shaped supports, but the mobility for material expansions caused by temperature changes is retained. There is also sufficient clearance between slot and pin (claim 2) so that the thermal expansion of the heat exchanger is made possible. This type of fastening also fulfills the task with regard to the effort for assembly and disassembly, because it is extremely simple to carry out, as can be seen from the above description.

Anspruch 2 beschreibt eine vorteilhafte Ausbildung der Halter, der oberen Streben und der Federspangen. Danach ist vorgesehen, daß die oberen Streben einen Schlitz aufweisen, in den ein am Halter angeordneter Stift eingreift. Ferner besitzen die Federspangen einen geraden und einen etwa wellenförmig verformten Schenkel, um Halter und Strebe zu umgreifen. Weil beide Schenkel der zu verwendenden Federspangen in einer Ebene liegen und die Strebe und den Halter gemeinsam umgreifen, können die Federspangen einfacher ausgebildet sein. Der Einsatz von handelsüblichen, standardmäßigen Federspangen ist damit möglich geworden.
Der Halter besitzt an seiner vom Stift abgekehrten Seite eine etwa halbrunde Kontur, so daß die Federspange mit ihrem wellenförmigen Schenkel den Halter schlüssig umgreifen kann. Am Ende des wellenförmigen Schenkels der Federklammer besitzt dieselbe eine Aufweitung, wodurch die Federklammer ohne Hilfe irgendwelcher Werkzeuge über die halbrunde Kontur des Halters geschoben werden kann.
Vorzugsweise bestehen die Sammelkästen beider Wärmetauscher aus Aluminium. Weiterhin sind die Sammelkästen des ersten Wärmetauschers aus Aluminiumguß hergestellt, wobei die Halter und die Auflager an die Sammelkästen angeformt sind. Die Sammelkästen des zweiten Wärmetauschers sind bevorzugt aus einem Aluminiumhalbzeug, beispielsweise aus einem Rohr hergestellt, wobei die Streben mittels Löten an diesen Sammelkästen befestigt werden. Die somit komplette Herstellung der Wärmetauscher aus Aluminium gewährleistet das vollständige Recycling und entspricht deshalb den Forderungen nach Reduzierung des Abfalls.
Weitere Merkmale ergeben sich aus den Ansprüchen. Ferner gehen Merkmale und Vorteile aus der folgenden Beschreibung eines Ausführungsbeispieles hervor.
Die beiliegenden Figuren zeigen:

  • Fig. 1 Teil einer Perspektivansicht zweier Wärmetauscher, die mittels der Vorrichtung verbunden sind;
  • Fig. 2 ein unteres Auflager mit eingesetzter Strebe;
  • Fig. 3 Halter mit Strebe und Federspange;
    • Gemäß Fig. 1 ist ein Wärmetauscher 1, der ein Ladeluftkühler eines Kraftfahrzeuges ist, mit einem Wärmetauscher 2, der einen Kondensator der Klimaanlage des Kraftfahrzeuges darstellt, verbunden. Durch das Kühlnetz 3, 4 beider Wärmetauscher 1 und 2 strömt die Kühlluft hindurch. Es wurde nur eine Seite der Vorrichtung dargestellt. Die andere Seite ist identisch. Die Sammelkästen 5 des Wärmetauschers 1 sind aus Aluminiumguß hergestellt, so daß die unteren Auflager 6 und die oberen Halter 7 direkt an einer Längswand 8 der Sammelkästen 5 angeformt sind. Die Sammelkästen 9 des Wärmetauschers 2 bestehen im Prinzip aus einem Aluminiumrohr, das oben und unten verschlossen ist und an der einen Längsseite Schlitze aufweist, in denen die Enden der Wärmetauscherrohre münden. Dies ist nicht dargestellt worden, weil solche Ausbildungen für Kondensatoren typisch sind. An diesen Sammelkästen 9 sind je zwei Streben 10o, 10u befestigt worden, die einen etwa halbrunden Fuß 11 aufweisen, der passend an den runden Sammelkästen 9 anliegt und mittels Löten verbunden ist. Die unteren Auflager 6 sind U - förmig ausgebildet, wobei sich die beiden Schenkel 6a, 6b des U in Längsrichtung der Sammelkästen 5 erstrecken. Der innen liegende Schenkel 6a besitzt eine Verdikkung 6c bzw. eine Nase, die es zuläßt, die Streben 10u des Wärmetauschers 2 einzusetzen, jedoch zunächst so, daß sein Kühlnetz 4 sich noch in einer Schräge zum Kühlnetz 3 des Wärmetauschers 1 befindet. Durch Andrücken des zweiten Wärmetauschers 2 an den ersten Wärmetauscher 1, in Richtung des in Fig. 2 eingezeichneten Pfeiles 15, werden die Streben 10u gegen die erwähnten Nasen 6c gedrückt und dadurch einer Torsionsspannung unterworfen bzw. durch Einklemmen in den U - förmigen Auflagern 6 gehalten. Die Torsionsspannung in der Strebe 10u ist relativ gering, sie reicht jedoch aus, um das Einklemmen der Streben 10u zwischen Schenkeln 6a und 6b der Auflager 6 zu bewerkstelligen, so daß beide Wärmetauscher 1 und 2 im unteren Bereich betriebssicher zusammengehalten werden und trotzdem Wärmedehnungen zulassen. Fig. 2 zeigt anschaulich, daß eine weiter gegen den Pfeil 15 vorstehende Nase 6c zu größeren Torsionsspannungen und damit Klemmkräften in den Streben 10u führen würde. In dieser Stellung, in der beide Kühlnetze 3, 4 der Wärmetauscher 1 und 2 etwa parallel zueinander sind, befinden sich die oberen Streben 10o, die einen Schlitz 12 aufweisen, mit demselben in Berührung mit den oberen Haltern 7. (Fig. 1) An den oberen Haltern 7 ist jeweils ein Stift 13 angeordnet, der durch den Schlitz 12 hindurchgeht. Der Stift 13 hat im Schlitz 12 in Längs - und Querrichtung ausreichendes Spiel, um die Wärmedehnung zuzulassen und um sicherzustellen, daß die Verbindung unter Betriebsbedingungen im Fahrzeug die notwendige Sicherheit aufweist.
    Wie die Fig. 3 zeigt, hat die Federspange 14 einen geraden Schenkel 14a und einen wellenförmigen Schenkel 14b. Der Halter 7 hat eine L-förmige Gestalt. Mit dem einen Schenkel ist der Halter 7 am Sammelkasten 5 angeformt. Am anderen Schenkel ist der Stift 13 angeordnet, an dessen rückwärtigem Ende eine etwa halbrunde Kontur 7a vorhanden ist. Die halbrunde Kontur 7a paßt in etwa mit der Rundung im wellenförmigen Schenkel 14b zusammen, so daß die über den Halter 7 und Strebe 10o geschobene Federspange 14 unter allen Betriebsbedingungen eine sichere Verbindung zwischen den zwei Wärmetauschern 1, 2 darstellt, die schnell montiert und demontiert werden kann. Am unteren Ende des wellenförmigen Schenkels 14b ist eine Aufbiegung 16 angeformt worden, um die Federspange 14 von oben über Halter 7 und Strebe 10o schieben zu können.Claim 2 describes an advantageous embodiment of the holder, the upper struts and the spring clips. Thereafter, it is provided that the upper struts have a slot into which a pin arranged on the holder engages. Furthermore, the spring clips have a straight and an approximately wave-shaped leg to encompass the holder and strut. Because both legs of the spring clips to be used lie in one plane and encompass the strut and the holder together, the spring clips can be made simpler. The use of commercially available, standard spring clips has become possible.
    The holder has on its side facing away from the pin an approximately semicircular contour, so that the spring clip with its wavy leg can grip around the holder. At the end of the wave-shaped leg of the spring clip it has a widening, as a result of which the spring clip can be pushed over the semicircular contour of the holder without the aid of any tools.
    The header boxes of both heat exchangers are preferably made of aluminum. Furthermore, the header boxes of the first heat exchanger are made of cast aluminum, the holders and the supports being molded onto the header boxes. The header boxes of the second heat exchanger are preferably made from a semi-finished aluminum product, for example from a tube, the struts being attached to these header boxes by means of soldering. The complete manufacture of the aluminum heat exchangers ensures complete recycling and therefore meets the requirements for reducing waste.
    Further features result from the claims. Features and advantages also emerge from the following description of an exemplary embodiment.
    The attached figures show:
  • 1 part of a perspective view of two heat exchangers which are connected by means of the device;
  • 2 shows a lower support with an inserted strut;
  • Fig. 3 holder with strut and spring clip;
    • 1, a heat exchanger 1, which is a charge air cooler of a motor vehicle, is connected to a heat exchanger 2, which is a condenser of the air conditioning system of the motor vehicle. The cooling air flows through the cooling network 3, 4 of both heat exchangers 1 and 2. Only one side of the device has been shown. The other side is identical. The header boxes 5 of the heat exchanger 1 are made of cast aluminum, so that the lower supports 6 and the upper holders 7 are formed directly on a longitudinal wall 8 of the header boxes 5. The header boxes 9 of the heat exchanger 2 consist in principle of an aluminum tube which is closed at the top and bottom and has slots on one longitudinal side in which the ends of the heat exchanger tubes open. This has not been shown because such designs are typical for capacitors. Two struts 10o, 10u have each been fastened to these collecting boxes 9, which have an approximately semicircular foot 11 which fits snugly against the round collecting boxes 9 and is connected by means of soldering. The lower supports 6 are U-shaped, the two legs 6a, 6b of the U extending in the longitudinal direction of the collecting boxes 5. The inside leg 6a has a thickening 6c or a nose which allows the struts 10u of the heat exchanger 2 to be used, but initially so that its cooling network 4 is still at an angle to the cooling network 3 of the heat exchanger 1. By pressing the second heat exchanger 2 against the first heat exchanger 1, in the direction of the arrow 15 shown in FIG. 2, the struts 10u are pressed against the lugs 6c mentioned and thereby subjected to a torsional stress or held in the U-shaped supports 6 by being clamped . The torsional stress in the strut 10u is relatively low, but it is sufficient to accomplish the clamping of the struts 10u between the legs 6a and 6b of the supports 6, so that both heat exchangers 1 and 2 are held together reliably in the lower region and nevertheless allow thermal expansion. Fig. 2 shows clearly that a nose 6c protruding further against the arrow 15 would lead to greater torsional stresses and thus clamping forces in the struts 10u. In this position, in which both cooling networks 3, 4 of the heat exchangers 1 and 2 are approximately parallel to one another, the upper struts 10o, which have a slot 12, are in contact with the upper brackets 7 (FIG. 1) The upper holders 7 are each arranged with a pin 13 which passes through the slot 12. The pin 13 has sufficient play in the slot 12 in the longitudinal and transverse directions to permit thermal expansion and to ensure that the connection has the necessary safety under operating conditions in the vehicle.
    3 shows, the spring clip 14 has a straight leg 14a and a wavy leg 14b. The holder 7 has an L-shaped shape. The holder 7 is integrally formed on the collecting box 5 with one leg. On the other leg, the pin 13 is arranged, at the rear end of which there is an approximately semicircular contour 7a. The semicircular contour 7a fits approximately with the curvature in the wave-shaped leg 14b, so that the spring clip 14 pushed over the holder 7 and strut 10o represents a secure connection between the two heat exchangers 1, 2 under all operating conditions, which are quickly assembled and disassembled can. At the lower end of the wave-shaped leg 14b, a bend 16 has been formed in order to be able to push the spring clip 14 from above over the holder 7 and the strut 10o.

    Claims (7)

    Vorrichtung zur Verbindung zweier Wärmetauscher (1, 2) für Kraftfahrzeuge, bestehend aus unteren Auflagern (6) am Sammelkasten (5) des ersten Wärmetauschers (1), in die die unteren Streben (10u) des zweiten Wärmetauschers (2) eingreifen und aus oberen zweischenkligen Federspangen (14), deren einer Schenkel die oberen Streben (10o) des zweiten Wärmetauschers (2) nach dem Andrücken des zweiten Wärmetauschers (2) an den ersten Wärmetauscher (1) umgreift, um beide Wärmetauscher (1, 2) elastisch aneinander festzuhalten, dadurch gekennzeichnet, daß
    die unteren Auflager (6) am Sammelkasten (5) des ersten Wärmetauschers (1) die unteren am Sammelkasten (9) des zweiten Wärmetauschers (2) befestigten Streben (10u) unter einer Torsionsspannung im elastischen Bereich stehend festhalten und daß obere, am Sammelkasten (9) des zweiten Wärmetauschers (2) befestigte Streben (10o) und am Sammelkasten (9) des ersten Wärmetauschers (1) befestigte Halter (7) jeweils von beiden Schenkeln (14a, 14b) der Federspange (14) derart umfaßt und zusammengehalten sind, daß die Torsionsspannung in den Streben (10u) aufrechterhalten bleibt.    Device for connecting two heat exchangers (1, 2) for motor vehicles, consisting of lower supports (6) on the header tank (5) of the first heat exchanger (1), into which the lower struts (10u) of the second heat exchanger (2) engage and from upper ones two-leg spring clips (14), one leg of which engages around the upper struts (10o) of the second heat exchanger (2) after the second heat exchanger (2) has been pressed onto the first heat exchanger (1) in order to hold both heat exchangers (1, 2) together elastically , characterized in that
    hold the lower supports (6) on the header tank (5) of the first heat exchanger (1) the lower struts (10u) attached to the header tank (9) of the second heat exchanger (2) under torsional stress in the elastic range and that the upper, on the header tank ( 9) of the second heat exchanger (2) fixed struts (10o) and on the header (9) of the first heat exchanger (1) fastened holder (7) each surrounded by two legs (14a, 14b) of the spring clip (14) and held together, that the torsional stress in the struts (10u) is maintained.         Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die oberen Streben (10o) am ersten Wärmetauscher (1) einen Schlitz (12) aufweisen, in den ein Stift (13) des Halters (7) eingreift und die Federspange (14) einen im wesentlichen geraden Schenkel (14a) besitzt, der über die eine Seite der Strebe (100) greift und einen im wesentlichen wellenförmig verformten Schenkel (14b), der die andere Seite der Strebe (10o) und die vom Stift (13) abgewandte Seite des Halters (7) umgreift, wobei beide Schenkel (14a, 14b) in einer Ebene liegen.Device according to claim 1, characterized in that the upper struts (10o) on the first Heat exchanger (1) have a slot (12) into which a pin (13) of the holder (7) engages and Spring clip (14) has a substantially straight leg (14a) over one side of the The strut (100) engages and one leg (14b) deformed essentially in a wave shape, the other Side of the strut (10o) and the side of the holder (7) facing away from the pin (13), both of which Legs (14a, 14b) lie in one plane. Vorrichtung nach den vorstehenden Ansprüchen, dadurch gekennzeichnet, daß die vom Stift (13) des Halters (7) abgewandte Seite etwa halbrunde Kontur (7a) aufweist, die etwa von dem wellenförmig verformten Schenkel (14b) der Federspange (14) umschlossen ist.Device according to the preceding claims, characterized in that the pin (13) Side of the holder (7) facing away has approximately semicircular contour (7a) which is approximately wavy deformed leg (14b) of the spring clip (14) is enclosed. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Auflager (6) einen etwa U - förmigen Querschnitt aufweisen und so an den Längswänden (8) der Sammelkästen (5) befestigt sind, daß beide Schenkel (6a, 6b) des U sich in Längsrichtung des jeweiligen Sammelkastens (5) erstrecken, wobei einer der Schenkel (6a) eine Verdickung (6c) aufweist, an der jeweils eine Strebe (10u) beim Andrücken des zweiten Wärmetauschers (2) an den ersten Wärmetauscher (1) zur Anlage kommt, um in ihrer Längsrichtung eine Torsionsspannung aufzunehmen und in den Auflagern (6) eingeklemmt zu sein.Device according to claim 1, characterized in that the supports (6) are approximately U - shaped Have cross-section and are attached to the longitudinal walls (8) of the collecting boxes (5) that both legs (6a, 6b) of the U extend in the longitudinal direction of the respective collecting tank (5), one of the legs (6a) has a thickening (6c), on each of which a strut (10u) at Pressing the second heat exchanger (2) to the first heat exchanger (1) comes to the system absorb torsional stress in its longitudinal direction and clamp it in the supports (6) his. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Sammelkästen (5, 9) des ersten und zweiten Wärmetauschers (1, 2) aus Aluminium bestehen und die Halter (7), die Streben (10) und die Auflager (6) ebenfalls aus Aluminium sind.Device according to one of the preceding claims, characterized in that the collecting boxes (5, 9) of the first and second heat exchangers (1, 2) consist of aluminum and the holders (7), the struts (10) and the supports (6) are also made of aluminum. Vorrichtung nach Ansprüche 5, dadurch gekennzeichnet, daß die Sammelkästen (9) des zweiten Wärmetauschers (2) aus einem Halbzeug gefertigt und die Streben (10) an diesen Sammelkästen (9) angelötet sind sowie die Sammelkästen (5) des ersten Wärmetauschers als Aluminiumgußerzeugnis ausgebildet und die Auflager (6) und Halter (7) einstückig mit diesen Sammelkästen (5) gefertigt sind. Device according to claims 5, characterized in that the collecting boxes (9) of the second Heat exchanger (2) made from a semi-finished product and the struts (10) on these header boxes (9) are soldered as well as the header boxes (5) of the first heat exchanger as an aluminum cast product formed and the supports (6) and holder (7) are made in one piece with these collecting boxes (5). Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß beide Sammelkästen (5, 9)aus Aluminium-Halbzeug gefertigt sind und Streben (10), Halter (7) und Auflager (6) als Einzelteile an den Sammelkästen angelötet sind.Device according to claim 5, characterized in that both collecting boxes (5, 9) made of semi-finished aluminum are manufactured and struts (10), holder (7) and support (6) as individual parts on the collection boxes are soldered on.
    EP01100353A 2000-01-22 2001-01-05 Device for joining two heat exchangers Expired - Lifetime EP1118830B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10002745A DE10002745A1 (en) 2000-01-22 2000-01-22 Device for connecting two heat exchangers
    DE10002745 2000-01-22

    Publications (3)

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    EP1118830A2 true EP1118830A2 (en) 2001-07-25
    EP1118830A3 EP1118830A3 (en) 2002-01-30
    EP1118830B1 EP1118830B1 (en) 2002-11-27

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    EP01100353A Expired - Lifetime EP1118830B1 (en) 2000-01-22 2001-01-05 Device for joining two heat exchangers

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    US (1) US6527044B2 (en)
    EP (1) EP1118830B1 (en)
    AT (1) ATE228638T1 (en)
    DE (2) DE10002745A1 (en)
    ES (1) ES2187486T3 (en)

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    Also Published As

    Publication number Publication date
    US6527044B2 (en) 2003-03-04
    DE50100060D1 (en) 2003-01-09
    EP1118830B1 (en) 2002-11-27
    US20010013405A1 (en) 2001-08-16
    ES2187486T3 (en) 2003-06-16
    EP1118830A3 (en) 2002-01-30
    DE10002745A1 (en) 2001-07-26
    ATE228638T1 (en) 2002-12-15

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