EP0666461B1 - Pipe connection for a water casing of a motor vehicle heat exchanger - Google Patents

Pipe connection for a water casing of a motor vehicle heat exchanger Download PDF

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Publication number
EP0666461B1
EP0666461B1 EP95100073A EP95100073A EP0666461B1 EP 0666461 B1 EP0666461 B1 EP 0666461B1 EP 95100073 A EP95100073 A EP 95100073A EP 95100073 A EP95100073 A EP 95100073A EP 0666461 B1 EP0666461 B1 EP 0666461B1
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EP
European Patent Office
Prior art keywords
water tank
connection
pipe
connecting piece
pipe connection
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
EP95100073A
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German (de)
French (fr)
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EP0666461B2 (en
EP0666461A1 (en
Inventor
Dipl.-Ing. Prasanta Halder
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Mahle Behr GmbH and Co KG
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Behr GmbH and Co KG
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Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0666461A1 publication Critical patent/EP0666461A1/en
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Publication of EP0666461B1 publication Critical patent/EP0666461B1/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
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0256—Arrangements for coupling connectors with flow lines
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/906—Equivalents

Definitions

  • the invention relates to a water tank for a motor vehicle heat exchanger with at least one connecting piece, which has a connection area which in one with a peripheral edge protruding inwards or outwards Opening of the water box is used, the Water box is made of an aluminum material.
  • Such a water box is known from DE-A-20 19 743.
  • the well-known water box is made of an aluminum alloy manufactured and with a feed for receiving a connecting piece provided mechanically after insertion into the feeder connected to the feeder and thus to the water tank becomes.
  • a water tank for a motor vehicle heat exchanger known, which has a pipe connection.
  • a pipe connection for this there is a one-piece with the water tank Molded connection piece, in the opening of a pipe end of a for guiding the heat exchange liquid tube is axially insertable.
  • This pipe is in the connector thanks to a U-shaped, radially insertable clamp held.
  • the water box including the connection piece is made of plastic. Plastic water boxes are however not suitable for higher system pressures.
  • the object of the invention is to provide a pipe connection at the beginning to create the type mentioned, its uses improved are and for motor vehicle heat exchange systems relatively high system pressures is suitable.
  • a heat exchanger for a motor vehicle is a radiator in FIG. 1 (1) for a passenger car.
  • the radiator (1) has an upper water tank (2) and a two-part lower water tank (3), between which one in half (5 and 6) divided finned tube block runs.
  • the finned tube block of the radiator (1) is thus in two halves (5 and 6) split independently of heat exchange fluid can be flowed through.
  • the radiator (1) is therefore particularly suitable for passenger cars where the heating temperature in the interior for the driver's side and the Passenger side can be set separately.
  • To the separate To achieve flow with heat exchange fluid, is on the upper water tank (2) a pipe connection (7) for as Supply pipe (10) provided.
  • a pipe connection (8, 9) serving as a drain is provided.
  • the radiator (1) therefore has an inlet and two independent processes.
  • the tube (12) is only a pipe socket, to which by means of a pipe connection (14) another tube (13) connects.
  • the tube (11) is in 1 not visible behind the tube (12) or the tube (13) arranged.
  • the tubes (11 and 13) and the Pipe socket (12) for the tube (13) have in the embodiment a diameter of 15 mm.
  • connection (7) connecting pipe (10) has a larger one Diameter of 18 mm to find suitable flow conditions to create in the flow circuit, because at the lower water tank (3) two pipes (11, 12) and on the upper water tank only one pipe (10) connects.
  • the two tubes (11; 12, 13) as Inlets and the pipe (10) with the correspondingly enlarged Diameter provided as a return.
  • the outer wall of the radiator (1) is of an insulation known per se (16) surround.
  • the two water boxes (2 and 3) are Made from an aluminum material using the deep-drawing process and suitable for relatively high system pressures.
  • the pipe connections (7, 8 and 14) are each with a connection piece (15, 15a) provided, one from the respective water tank (2, 3) or the pipe socket (12) separate and in one piece Representing connector.
  • the connecting piece (15a) are provided in the area of the pipe connections (8, 14) adapted the diameter of the tubes (11, 12, 13).
  • the connecting piece (15), on the other hand, is somewhat larger and is designed for Adjusted the diameter of the tube (10). Except for their different However, the size of the connecting pieces (15 and 15a) is identical.
  • the connecting piece (15) is based on the following 2 and 3 described in more detail.
  • the connecting piece (15) in to be able to use the upper water tank (2) Wall of the upper water tank (2) a circular opening on that for reinforcement with an inward curved, circumferential Edge is provided.
  • the opening in the area of the pipe connection (8) in the lower water tank (3) is designed analogously, so that the detailed description of the pipe connection (7) on the upper water tank (2) accordingly also on the lower one Water box (3) is transferable.
  • the connector (15) is made of the same material as the water tank (2), namely made of an aluminum material and has one tubular connection area whose outer diameter so to the inside diameter of the opening in the upper water tank (2) is adapted that the connection area is inserted into the opening can be.
  • connection area closes a step-widened cylindrical area larger Diameter, which acts as a stop collar for exact positioning the connecting piece (15) in the opening of the water tank (2) serves.
  • the connection piece (15) is therefore so far can be inserted into the opening of the water tank (2) until the Stop collar on the outside of the edge of the opening of the Water box (2) comes to the plant.
  • the front is a square opening, which is delimited by four side walls (20 and 21). Are there each of the opposite side walls (21 or 20) in height, Width and shape identical.
  • the side walls (20) are higher and wider than the side walls (21) and each have two slots for the implementation of a securing clip (17).
  • the securing clip (17) engages behind a compression-formed one Collar (18) of the axially in the connecting piece (15) inserted pipe end of the pipe (10).
  • the outside diameter of the tube (10) corresponds approximately to the inside diameter of the Connection area of the connecting piece (15).
  • a circumferential seal (19) is provided, which when pushing the pipe end through the collar (18) pressed together becomes.
  • the connecting piece (15) is in one piece in Thermoforming process is created, creating the connection area and the stop collar are created. After punching the Slits in the later side walls (20) become the side walls (20 and 21) superscript accordingly.
  • connection piece (15) can also afterwards in the already finished radiator (1) be soldered in.
  • the outer wall of the water tank (2) solder-plated, so that after Insert the connecting piece (15) when heated Soldering temperature in the connection area of the connection piece (15) directly adjusts a solder joint.
  • the pipe connection (9) of the lower water tank (3) is relative poorly accessible.
  • This pipe connection (14) is on the side next to the radiator (1) and is relatively accessible.
  • the pipe connection is according to the 4, so that subsequently on Fig. 4 is referred.
  • the connecting piece (15a) of the pipe connection (14) is with the connector described in detail (15) identical to FIGS. 2 and 3. That too tight insertion of the tube (13) into the connecting piece (15a) is identical to the described embodiment.
  • connection piece (15a) The end of the connection area of the connection piece (15a), however placed on the outside of the tube end of the tube (12a) and soldered to this outside.
  • This soldered connection corresponds to the connection of the connecting piece (15a) with the Pipe elbow (12), so that in this respect for a further explanation can be dispensed with.
  • the inside diameter of the connection area the connecting piece (15a) corresponds to the outer diameter the tube end of the tube (12a), so that when soldering of the connection area with the pipe end all around tight connection between the connecting piece (15a) and the Pipe end of the tube (12a) is created.
  • the connecting piece (15b) has a tubular connection area and an adjoining Stop collar on, the connecting piece (15b) by means of its connection area in an opening of a wall of a Water box (2a) is used.
  • the opening is from one bounded to the outside protruding peripheral edge.
  • the connection piece (15b) is tight in its connection area soldered to the edge of the opening of the water tank (2a).
  • Tube end of the tube (10) is however in this version not by a plug-in bracket, but by means of a a screw-secured tab (23) tight in the connecting piece (15b) held.
  • connection piece (15b) The outwardly protruding edge of the Connection piece (15b) is on two opposite sides folded over to increase stability, creating a hooking edge (22) and a receiving area (25) for a screw (24) results.
  • On the opposite side is the securing tab (23) provided with a hole through which the screw (24) can be pushed is.
  • the screw (24) is therefore screwed into the receiving area (25), it clamps the securing tab (23), whereby the collar (18) is pressed tightly into the connecting piece (15b).
  • FIGS. 5 and 6 An embodiment of the invention, not shown, corresponds essentially the representation of FIGS. 5 and 6.
  • this embodiment is the lower edge of the connection area of the connecting piece with a radial after provided on the inside with a corresponding notch Notch at the lower edge of the outer surface of the tube at Inserting the tube is engaged. This is ensures that the pipe is only in a certain position the connecting piece can be used.

Description

Die Erfindung betrifft einen Wasserkasten für einen Kraftfahrzeug-Wärmetauscher mit wenigstens einem Anschlußstutzen, der einen Verbindungsbereich aufweist, der in eine mit einem nach innen oder nach außen abragenden, umlaufenden Rand versehene Öffnung des Wasserkastens eingesetzt ist, wobei der Wasserkasten aus einem Aluminiumwerkstoff hergestellt ist.The invention relates to a water tank for a motor vehicle heat exchanger with at least one connecting piece, which has a connection area which in one with a peripheral edge protruding inwards or outwards Opening of the water box is used, the Water box is made of an aluminum material.

Ein solcher Wasserkasten ist aus der DE-A-20 19 743 bekannt. Der bekannte Wasserkasten ist aus einer Aluminiumlegierung hergestellt und mit einem Einzug zur Aufnahme eines Anschlußstutzens versehen, der nach dem Einsetzen in den Einzug mechanisch mit dem Einzug und damit mit dem Wasserkasten verbunden wird. Auf den Anschlußstutzen ist ein Kühlmittelschlauch aufsteckbar.Such a water box is known from DE-A-20 19 743. The well-known water box is made of an aluminum alloy manufactured and with a feed for receiving a connecting piece provided mechanically after insertion into the feeder connected to the feeder and thus to the water tank becomes. There is a coolant hose on the connecting piece attachable.

Aus der DE-A-35 17 488 ist ein Wasserkasten für einen Kraftfahrzeug-Wärmetauscher bekannt, der einen Rohranschluß aufweist. Dazu ist am Wasserkasten ein mit diesem einstückiger Anschlußstutzen angeformt, in dessen Öffnung ein Rohrende eines zur Führung von Wärmetauschflüssigkeit dienenden Rohres axial einsteckbar ist. Dieses Rohr wird im Anschlußstutzen durch eine U-förmig gebogene und radial einschiebbare Klammer gehalten. Der Wasserkasten einschließich des Anschlußstutzens ist aus Kunststoff hergestellt. Kunststoff-Wasserkästen sind jedoch für höhere Systemdrücke nicht geeignet.From DE-A-35 17 488 is a water tank for a motor vehicle heat exchanger known, which has a pipe connection. For this there is a one-piece with the water tank Molded connection piece, in the opening of a pipe end of a for guiding the heat exchange liquid tube is axially insertable. This pipe is in the connector thanks to a U-shaped, radially insertable clamp held. The water box including the connection piece is made of plastic. Plastic water boxes are however not suitable for higher system pressures.

Aufgabe der Erfindung ist es, einen Rohranschluß der eingangs genannten Art zu schaffen, dessen Einsatzmöglichkeiten verbessert sind und der für Kraftfahrzeug-Wärmetauschanlagen mit relativ hohen Systemdrücken geeignet ist.The object of the invention is to provide a pipe connection at the beginning to create the type mentioned, its uses improved are and for motor vehicle heat exchange systems relatively high system pressures is suitable.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Dadurch ist es möglich, den Anschlußstutzen an gut zugänglichen Stellen des Wasserkastens anzubringen. Die Herstellung des Wasserkastens und des Anschlußstutzens vereinfacht sich durch die Trennung von Anschlußstutzen und Wasserkasten wesentlich. Durch die Trennung des Anschlußstutzens als Anschlußbauteil ist es auch möglich, den Rohranschluß als Verbindung zwischen zwei Rohren einzusetzen. Durch die erfindungsgemäße Lösung kann der Anschlußstutzen gemeinsam mit der Verlötung des übrigen Wärmetauschers in einem Arbeitsgang verlötet werden. Dadurch wird eine kostengünstige und einfache Herstellung erzielt. Durch die gleiche Materialwahl für den Anschlußstutzen und den Wasserkasten in Form einer Aluminiumlegierung wird eine einfache Verbindung zwischen den Bauteilen geschaffen. Die durch die Lotbeschichtung ermöglichte dichte Lötverbindung schafft die Eignung der erfindungsgemäßen Lösung insbesondere für hohe Systemdrücke. This object is solved by the features of claim 1. This makes it possible to connect the connecting piece to easily accessible Place the water tank. The production the water box and the connecting piece is simplified due to the separation of connection piece and water box. By separating the connection piece as a connection component it is also possible to use the pipe connection as a connection between two pipes. By the invention Solution, the connection piece together with the Soldering the rest of the heat exchanger in one operation to be soldered. This makes it inexpensive and simple Manufacturing achieved. By choosing the same material for the connecting piece and the water tank in the form of a Aluminum alloy becomes a simple connection between the components. That made possible by the solder coating tight solder connection creates the suitability of the invention Solution especially for high system pressures.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus den Unteransprüchen. Nachfolgend sind Ausführungsbeispiele der Erfindung beschrieben und anhand der Zeichnungen dargestellt.

Fig. 1
zeigt in einem Schnitt einen Kraftfahrzeug-Wärmetauscher in Form eines Heizkörpers mit einem oberen und einem unteren Wasserkasten, wobei für jeden Wasserkasten eine Ausführungsform eines erfindungsgemäßen Rohranschlusses vorgesehen ist,
Fig. 2
in vergrößerter Darstellung einen Ausschnitt des oberen Wasserkastens des Heizkörpers nach Fig. 1 auf Höhe des Rohranschlusses, wobei aus Übersichtlichkeitsgründen die Isolierung des Heizkörpers nicht dargestellt ist,
Fig. 3
einen Schnitt durch einen Anschlußstutzen des Rohranschlusses nach Fig. 2 entlang der Schnittlinie III-III in Fig. 2,
Fig. 4
in vergrößerter Darstellung einen Einsatz des Anschlußstutzens nach den Fig. 2 und 3 für die Verbindung zweier Rohre,
Fig. 5
eine weitere Ausführungsform eines Rohranschlusses ähnlich Fig. 2, bei dem ein axial in den Anschlußstutzen hineingestecktes Rohrende mittels einer anschraubbaren Lasche dicht gehalten ist und
Fig. 6
eine Draufsicht auf den Anschlußstutzen nach Fig. 5, wobei jedoch das eingesteckte Rohrende sowie die anzuschraubende Klemmlasche nicht dargestellt sind.
Further advantages and features of the invention emerge from the subclaims. Exemplary embodiments of the invention are described below and illustrated with the aid of the drawings.
Fig. 1
shows in a section a motor vehicle heat exchanger in the form of a radiator with an upper and a lower water tank, wherein an embodiment of a pipe connection according to the invention is provided for each water box,
Fig. 2
1 at a height of the pipe connection in an enlarged representation of a section of the upper water tank of the radiator, the insulation of the radiator not being shown for reasons of clarity,
Fig. 3
3 shows a section through a connecting piece of the pipe connection according to FIG. 2 along the section line III-III in FIG. 2,
Fig. 4
in an enlarged view an insert of the connection piece according to FIGS. 2 and 3 for the connection of two pipes,
Fig. 5
a further embodiment of a pipe connection similar to FIG. 2, in which a pipe end axially inserted into the connecting piece is held tight by means of a screwable tab and
Fig. 6
a plan view of the connecting piece according to Fig. 5, but the inserted pipe end and the screw-on clamping tab are not shown.

Ein Wärmetauscher für ein Kraftfahrzeug ist in Fig. 1 ein Heizkörper (1) für einen Personenkraftwagen. Der Heizkörper (1) weist einen oberen Wasserkasten (2) sowie einen zweigeteilten unteren Wasserkasten (3) auf, zwischen denen ein in zwei Hälften (5 und 6) unterteilter Rippenrohrblock verläuft. Der Rippenrohrblock des Heizkörpers (1) ist somit in zwei Hälften (5 und 6) aufgeteilt, die unabhängig voneinander von Wärmetauschflüssigkeit durchströmt werden können. Der Heizkörper (1) ist daher insbesondere für Personenkraftwagen geeignet, bei denen die Heiztemperatur im Innenraum für die Fahrerseite und die Beifahrerseite jeweils getrennt einstellbar ist. Um die getrennte Durchströmung mit Wärmetauschflüssigkeit zu erzielen, ist am oberen Wasserkasten (2) ein Rohranschluß (7) für ein als Zuleitung dienendes Rohr (10) vorgesehen. Am unteren Wasserkasten (3) ist für jede Hälfte (5 und 6) des Rippenrohrblockes jeweils ein als Ablauf dienender Rohranschluß (8, 9) vorgesehen. An den Rohranschluß (8) für die rechte Hälfte (6) des Rippenrohrblockes schließt ein Rohr (11), an den Rohranschluß (9) für die linke Hälfte (5) des Rippenrohrblockes schließt ein Rohr (12) an. Der Heizkörper (1) weist daher einen Zulauf und zwei voneinander unabhängige Abläufe auf. Das Rohr (12) ist lediglich ein Rohrstutzen, an den mittels eines Rohranschlusses (14) ein weiteres Rohr (13) anschließt. Das Rohr (11) ist in der Darstellung nach Fig. 1 nicht sichtbar hinter dem Rohr (12) bzw. dem Rohr (13) angeordnet. Die Rohre (11 und 13) sowie der Rohrstutzen (12) für das Rohr (13) weisen beim Ausführungsbeispiel einen Durchmesser von 15 mm auf. Das an den Rohranschluß (7) anschließende Rohr (10) hingegen weist einen größeren Durchmesser von 18 mm auf, um geeignete Strömungsverhältnisse im Strömungskreislauf zu schaffen, da an den unteren Wasserkasten (3) zwei Rohre (11, 12) und an den oberen Wasserkasten nur ein Rohr (10) anschließt. Bei einem anderen Ausführungsbeispiel der Erfindung sind die beiden Rohre (11; 12, 13) als Zuläufe und das Rohr (10) mit dem entsprechend vergrößerten Durchmesser als Rücklauf vorgesehen. Die Außenwandung des Heizkörpers (1) ist von einer an sich bekannten Isolierung (16) umgeben.A heat exchanger for a motor vehicle is a radiator in FIG. 1 (1) for a passenger car. The radiator (1) has an upper water tank (2) and a two-part lower water tank (3), between which one in half (5 and 6) divided finned tube block runs. The finned tube block of the radiator (1) is thus in two halves (5 and 6) split independently of heat exchange fluid can be flowed through. The radiator (1) is therefore particularly suitable for passenger cars where the heating temperature in the interior for the driver's side and the Passenger side can be set separately. To the separate To achieve flow with heat exchange fluid, is on the upper water tank (2) a pipe connection (7) for as Supply pipe (10) provided. At the lower water tank (3) is for each half (5 and 6) of the finned tube block A pipe connection (8, 9) serving as a drain is provided. At the pipe connection (8) for the right half (6) of the finned tube block closes a pipe (11) to the pipe connection (9) for the left half (5) of the finned tube block includes Tube (12). The radiator (1) therefore has an inlet and two independent processes. The tube (12) is only a pipe socket, to which by means of a pipe connection (14) another tube (13) connects. The tube (11) is in 1 not visible behind the tube (12) or the tube (13) arranged. The tubes (11 and 13) and the Pipe socket (12) for the tube (13) have in the embodiment a diameter of 15 mm. That to the pipe connection (7) connecting pipe (10), however, has a larger one Diameter of 18 mm to find suitable flow conditions to create in the flow circuit, because at the lower water tank (3) two pipes (11, 12) and on the upper water tank only one pipe (10) connects. In another embodiment the invention the two tubes (11; 12, 13) as Inlets and the pipe (10) with the correspondingly enlarged Diameter provided as a return. The outer wall of the radiator (1) is of an insulation known per se (16) surround.

Die beiden Wasserkästen (2 und 3) sind aus einem Aluminiumwerkstoff im Tiefziehverfahren hergestellt und für relativ hohe Systemdrücke geeignet.The two water boxes (2 and 3) are Made from an aluminum material using the deep-drawing process and suitable for relatively high system pressures.

Die Rohranschlüsse (7, 8 und 14) sind jeweils mit einem Anschlußstutzen (15, 15a) versehen, der ein vom jeweiligen Wasserkasten (2, 3) bzw. dem Rohrstutzen (12) getrenntes und einstückiges Anschlußbauteil darstellt. Die Anschlußstutzen (15a) sind im Bereich der Rohranschlüsse (8, 14) vorgesehen und an die Durchmesser der Rohre (11, 12, 13) angepaßt. Der Anschlußstutzen (15) hingegen ist etwas größer bemessen und an den Durchmesser des Rohres (10) angepaßt. Bis auf ihre unterschiedliche Größe sind die Anschlußstutzen (15 und 15a) jedoch identisch. Der Anschlußstutzen (15) wird im folgenden anhand der Fig. 2 und 3 näher beschrieben. Um den Anschlußstutzen (15) in den oberen Wasserkasten (2) einsetzen zu können, weist die Wandung des oberen Wasserkastens (2) eine kreisrunde Öffnung auf, die zur Verstärkung mit einem nach innen gebogenen, umlaufenden Rand versehen ist. Die Öffnung im Bereich des Rohranschlusses (8) im unteren Wasserkasten (3) ist analog ausgeführt, so daß die ausführliche Beschreibung des Rohranschlusses (7) am oberen Wasserkasten (2) entsprechend auch auf den unteren Wasserkasten (3) übertragbar ist. Der Anschlußstutzen (15) ist aus dem gleichen Werkstoff wie der Wasserkasten (2), nämlich aus einem Aluminiumwerkstoff, hergestellt und weist einen rohrförmigen Verbindungsbereich auf, dessen Außendurchmesser so an den Innendurchmesser der Öffnung im oberen Wasserkasten (2) angepaßt ist, daß der Verbindungsbereich in die Öffnung eingeschoben werden kann. An den Verbindungsbereich schließt sich ein stufenförmig aufgeweiteter zylindrischer Bereich größeren Durchmessers an, der als Anschlagkragen für eine exakte Positionierung des Anschlußstutzens (15) in der Öffnung des Wasserkastens (2) dient. Der Anschlußstutzen (15) ist daher so weit in die Öffnung des Wasserkastens (2) einschiebbar, bis der Anschlagkragen an der Außenseite des Randes der Öffnung des Wasserkastens (2) zur Anlage kommt.The pipe connections (7, 8 and 14) are each with a connection piece (15, 15a) provided, one from the respective water tank (2, 3) or the pipe socket (12) separate and in one piece Representing connector. The connecting piece (15a) are provided in the area of the pipe connections (8, 14) adapted the diameter of the tubes (11, 12, 13). The connecting piece (15), on the other hand, is somewhat larger and is designed for Adjusted the diameter of the tube (10). Except for their different However, the size of the connecting pieces (15 and 15a) is identical. The connecting piece (15) is based on the following 2 and 3 described in more detail. To the connecting piece (15) in to be able to use the upper water tank (2) Wall of the upper water tank (2) a circular opening on that for reinforcement with an inward curved, circumferential Edge is provided. The opening in the area of the pipe connection (8) in the lower water tank (3) is designed analogously, so that the detailed description of the pipe connection (7) on the upper water tank (2) accordingly also on the lower one Water box (3) is transferable. The connector (15) is made of the same material as the water tank (2), namely made of an aluminum material and has one tubular connection area whose outer diameter so to the inside diameter of the opening in the upper water tank (2) is adapted that the connection area is inserted into the opening can be. The connection area closes a step-widened cylindrical area larger Diameter, which acts as a stop collar for exact positioning the connecting piece (15) in the opening of the water tank (2) serves. The connection piece (15) is therefore so far can be inserted into the opening of the water tank (2) until the Stop collar on the outside of the edge of the opening of the Water box (2) comes to the plant.

Das dem Verbindungsbereich des Anschlußstutzens (15) gegenüberliegende Stirnende stellt eine quadratische Aufnahmeöffnung dar, die durch vier Seitenwände (20 und 21) begrenzt ist. Dabei sind jeweils die gegenüberliegenden Seitenwände (21 bzw. 20) in Höhe, Breite und Form identisch. Die Seitenwände (20) sind höher und breiter als die Seitenwände (21) und weisen jeweils zwei Schlitze für die Durchführung einer Sicherungsklammer (17) auf. Die Sicherungsklammer (17) hintergreift einen durch Stauchung gebildeten Kragen (18) des axial in den Anschlußstutzen (15) eingesteckten Rohrendes des Rohres (10). Der Außendurchmesser des Rohres (10) entspricht in etwa dem Innendurchmesser des Verbindungsbereiches des Anschlußstutzens (15). Im Bereich der Innenwandung des abgestuften Anschlagkragens des Anschlußstutzens (15) ist eine umlaufende Dichtung (19) vorgesehen, die beim Hineinschieben des Rohrendes durch den Kragen (18) zusammegepreßt wird. Um das Rohrende des Rohres (10) dicht in dem Anschlußstutzen (15) zu halten, hintergreift die U-förmige Sicherungsklammer (17), die durch die Schlitze der Seitenwände (20) hindurchgeschoben ist, den Kragen (18). Die Sicherung des Rohres (10) im Anschlußstutzen (15) entspricht im wesentlichen dem Rohranschluß gemäß der DE-A-35 17 488, auf die diesbezüglich verwiesen wird. Der Anschlußstutzen (15) ist einstückig im Tiefziehverfahren hergestellt, wodurch der Verbindungsbereich und der Anschlagkragen geschaffen werden. Nach dem Lochen der Schlitze in die späteren Seitenwände (20) werden die Seitenwände (20 und 21) entsprechend hochgestellt. Eine entsprechende Verlötung der Kanten der Seitenwände (20 und 21) miteinander ist nicht notwendig, da der Anschlußstutzen (15) auch ohne eine Verlötung bereits eine ausreichende Stabilität aufweist. Der in die Öffnung des Wasserkastens (2) eingeschobene Anschlußstutzen (15) wird mit der Wandung des Wasserkastens (2) verlötet. Dies ist in einfacher Weise in einem Arbeitsgang zusammen mit der Verlötung des Wasserkastens (2) mit dem Rippenrohrblock möglich. Selbstverständlich kann der Anschlußstutzen (15) auch nachträglich in den bereits fertiggestellten Heizkörper (1) eingelötet werden. Beim Ausführungsbeispiel ist die Außenwandung des Wasserkastens (2) lotplattiert, so daß sich nach dem Einstecken des Anschlußstutzens (15) bei einem Erhitzen auf Löttemperatur im Verbindungsbereich des Anschlußstutzens (15) direkt eine Lötverbindung einstellt.That opposite the connection area of the connection piece (15) The front is a square opening, which is delimited by four side walls (20 and 21). Are there each of the opposite side walls (21 or 20) in height, Width and shape identical. The side walls (20) are higher and wider than the side walls (21) and each have two slots for the implementation of a securing clip (17). The The securing clip (17) engages behind a compression-formed one Collar (18) of the axially in the connecting piece (15) inserted pipe end of the pipe (10). The outside diameter of the tube (10) corresponds approximately to the inside diameter of the Connection area of the connecting piece (15). In the field of Inner wall of the stepped stop collar of the connecting piece (15) a circumferential seal (19) is provided, which when pushing the pipe end through the collar (18) pressed together becomes. Around the pipe end of the pipe (10) tight in the Holding the connecting piece (15) engages behind the U-shaped securing clip (17) through the slits of the side walls (20) is pushed through the collar (18). Securing the Tube (10) in the connecting piece (15) corresponds essentially the pipe connection according to DE-A-35 17 488, in this regard is referred. The connecting piece (15) is in one piece in Thermoforming process is created, creating the connection area and the stop collar are created. After punching the Slits in the later side walls (20) become the side walls (20 and 21) superscript accordingly. A corresponding Solder the edges of the side walls (20 and 21) together is not necessary since the connecting piece (15) without one Soldering already has sufficient stability. The in the opening of the water box (2) inserted connecting piece (15) is soldered to the wall of the water tank (2). This is easily done in one operation with the The water box (2) can be soldered to the finned tube block. Of course, the connection piece (15) can also afterwards in the already finished radiator (1) be soldered in. In the embodiment, the outer wall of the water tank (2) solder-plated, so that after Insert the connecting piece (15) when heated Soldering temperature in the connection area of the connection piece (15) directly adjusts a solder joint.

Der Rohranschluß (9) des unteren Wasserkastens (3) ist relativ schlecht zugänglich. Um den Anschluß des Rohres (13) zu vereinfachen, ist in die Öffnung des Wasserkastens (3) im Bereich des Rohranschlusses (9) lediglich ein Ende eines Rohrkrümmers (12) eingelötet, an dessen anderem Ende der Rohranschluß (14) mit dem Anschlußstutzen (15a) vorgesehen ist. Dieser Rohranschluß (14) befindet sich seitlich neben dem Heizkörper (1) und ist relativ gut zugänglich. Der Rohranschluß ist entsprechend der Darstellung nach Fig. 4 ausgebildet, so daß nachfolgend auf Fig. 4 Bezug genommen wird. Der Anschlußstutzen (15a) des Rohranschlusses (14) ist mit dem ausführlich beschriebenen Anschlußstutzen (15) nach den Fig. 2 und 3 identisch. Auch das dichte Einsetzen des Rohres (13) in den Anschlußstutzen (15a) ist mit der beschriebenen Ausführungsform identisch. Das Ende des Verbindungsbereiches des Anschlußstutzens (15a) ist jedoch auf die Außenseite des Rohrendes des Rohres (12a) aufgesetzt und mit dieser Außenseite verlötet. Diese gelötete Verbindung entspricht der Verbindung des Anschlußstutzens (15a) mit dem Rohrkrümmer (12), so daß insoweit auf eine weitere Erläuterung verzichtet werden kann. Der Innendurchmesser des Verbindungsbereiches des Anschlußstutzens (15a) entspricht dem Außendurchmesser des Rohrendes des Rohres (12a), so daß bei einer Verlötung des Verbindungsbereiches mit dem Rohrende eine umlaufend dichte Verbindung zwischen dem Anschlußstutzen (15a) und dem Rohrende des Rohres (12a) geschaffen wird. The pipe connection (9) of the lower water tank (3) is relative poorly accessible. To simplify the connection of the pipe (13), is in the opening of the water tank (3) in the area of Pipe connection (9) only one end of a pipe bend (12) soldered, at the other end of the pipe connection (14) with the connecting piece (15a) is provided. This pipe connection (14) is on the side next to the radiator (1) and is relatively accessible. The pipe connection is according to the 4, so that subsequently on Fig. 4 is referred. The connecting piece (15a) of the pipe connection (14) is with the connector described in detail (15) identical to FIGS. 2 and 3. That too tight insertion of the tube (13) into the connecting piece (15a) is identical to the described embodiment. The end of the connection area of the connection piece (15a), however placed on the outside of the tube end of the tube (12a) and soldered to this outside. This soldered connection corresponds to the connection of the connecting piece (15a) with the Pipe elbow (12), so that in this respect for a further explanation can be dispensed with. The inside diameter of the connection area the connecting piece (15a) corresponds to the outer diameter the tube end of the tube (12a), so that when soldering of the connection area with the pipe end all around tight connection between the connecting piece (15a) and the Pipe end of the tube (12a) is created.

Der Rohranschluß gemäß den Fig. 5 und 6 ist gegenüber dem bisher beschriebenen Ausführungsformen geringfügig verändert. Auch bei dieser Ausführung weist der Anschlußstutzen (15b) einen rohrförmigen Verbindungsbereich und einen daran anschließenden Anschlagkragen auf, wobei der Anschlußstutzen (15b) mittels seines Verbindungsbereiches in eine Öffnung einer Wandung eines Wasserkastens (2a) eingesetzt ist. Die Öffnung ist von einem nach außen abragenden umlaufenden Rand umgrenzt. Auch hier ist der Anschlußstutzen (15b) in seinem Verbindungsbereich dicht mit dem Rand der Öffnung des Wasserkastens (2a) verlötet. Der Kragen (18) des in den Anschlußstutzen (15b) eingesteckten Rohrendes des Rohres (10) ist bei dieser Ausführung jedoch nicht durch eine steckbare Klammer, sondern durch eine mittels einer Schraubverbindung gesicherte Lasche (23) dicht in dem Anschlußstutzen (15b) gehalten. Der nach außen abragende Rand des Anschlußstutzens (15b) ist auf zwei gegenüberliegenden Seiten zur Erhöhung der Stabilität umgefalzt, wodurch sich eine Einhängekante (22) und ein Aufnahmebereich (25) für eine Schraube (24) ergibt. An der Einhängekante (22) des Anschlußstutzens (15b) wird ein hakenförmig gebogener Teil einer aus Blech bestehenden Sicherungslasche (23) eingehängt, die den Kragen (18) ähnlich der zuvor beschriebenen Sicherungsklammer hintergreift. Auf der gegenüberliegenden Seite ist die Sicherungslasche (23) mit einer Bohrung versehen, durch die die Schraube (24) hindurchschiebbar ist. Um das Einschrauben der Schraube (24) in den Aufnahmebereich (25) zu ermöglichen, weist dieser Aufnahmebereich (25) einen Gewindedurchzug (26) auf. Sobald die Schraube (24) daher in den Aufnahmebereich (25) eingeschraubt ist, klemmt sie die Sicherungslasche (23), wodurch der Kragen (18) dicht in den Anschlußstutzen (15b) hineingedrückt wird.5 and 6 is compared to that previously described embodiments slightly changed. Also in this embodiment, the connecting piece (15b) has a tubular connection area and an adjoining Stop collar on, the connecting piece (15b) by means of its connection area in an opening of a wall of a Water box (2a) is used. The opening is from one bounded to the outside protruding peripheral edge. Here too the connection piece (15b) is tight in its connection area soldered to the edge of the opening of the water tank (2a). Of the Collar (18) of the plugged into the connecting piece (15b) Tube end of the tube (10) is however in this version not by a plug-in bracket, but by means of a a screw-secured tab (23) tight in the connecting piece (15b) held. The outwardly protruding edge of the Connection piece (15b) is on two opposite sides folded over to increase stability, creating a hooking edge (22) and a receiving area (25) for a screw (24) results. On the hooking edge (22) of the connector (15b) becomes a hook-shaped part of an existing sheet metal Suspended securing tab (23), which the collar (18) similar to the securing clip described above. On the opposite side is the securing tab (23) provided with a hole through which the screw (24) can be pushed is. To screw the screw (24) in To enable the recording area (25), this recording area (25) a thread passage (26). Once the screw (24) is therefore screwed into the receiving area (25), it clamps the securing tab (23), whereby the collar (18) is pressed tightly into the connecting piece (15b).

Ein nicht dargestelltes Ausführungsbeispiel der Erfindung entspricht im wesentlichen der Darstellung nach Fig. 5 und 6. Bei diesem Ausführungsbeispiel ist der untere Rand des Verbindungsbereiches des Anschlußstutzens zusätzlich mit einer radial nach innen ragenden Einkerbung versehen, mit der eine entsprechende Einkerbung am unteren Rand der Mantelfläche des Rohres beim Einsetzen des Rohres in Eingriff gebracht wird. Dadurch ist gewährleistet, daß das Rohr nur in einer bestimmten Position in den Anschlußstutzen einsetzbar ist.An embodiment of the invention, not shown, corresponds essentially the representation of FIGS. 5 and 6. In this embodiment is the lower edge of the connection area of the connecting piece with a radial after provided on the inside with a corresponding notch Notch at the lower edge of the outer surface of the tube at Inserting the tube is engaged. This is ensures that the pipe is only in a certain position the connecting piece can be used.

Claims (2)

  1. A water tank for a motor vehicle heat exchanger with at least one connecting union (15, 15b) having a connecting zone which is inserted into an aperture in the water tank and which-is provided with an encircling edge projecting inwardly or outwardly, the water tank (2, 3, 2a) being produced from an aluminium material, characterised in that the water tank (2, 3, 2a) is produced by a deep-drawing process and in that the connecting union (15, 15b) is produced in one piece as a separate connecting component from aluminium material and likewise in a deep-drawing process and in that the connecting zone is pushed axially into the encircling edge and in that the connecting zone or the encircling edge are solder-coated so that an encircling sealing-tight connection is provided.
  2. A water tank according to claim 1, characterised in that adjacent the connecting zone of the connecting union (15, 15b) there is a step-shaped widened-out abutment collar for limiting the axial insertion of the connecting zone into the entrance.
EP95100073A 1994-02-04 1995-01-04 Pipe connection for a water casing of a motor vehicle heat exchanger Expired - Lifetime EP0666461B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4403402 1994-02-04
DE4403402A DE4403402A1 (en) 1994-02-04 1994-02-04 Pipe connection for a water tank of a motor vehicle heat exchanger

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EP0666461A1 EP0666461A1 (en) 1995-08-09
EP0666461B1 true EP0666461B1 (en) 1999-10-20
EP0666461B2 EP0666461B2 (en) 2004-11-17

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EP (1) EP0666461B2 (en)
DE (2) DE4403402A1 (en)
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Also Published As

Publication number Publication date
ES2137381T3 (en) 1999-12-16
US5524938A (en) 1996-06-11
EP0666461B2 (en) 2004-11-17
EP0666461A1 (en) 1995-08-09
DE59507064D1 (en) 1999-11-25
DE4403402A1 (en) 1995-08-10
ES2137381T5 (en) 2005-05-16

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