EP1310748B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP1310748B1
EP1310748B1 EP02023317A EP02023317A EP1310748B1 EP 1310748 B1 EP1310748 B1 EP 1310748B1 EP 02023317 A EP02023317 A EP 02023317A EP 02023317 A EP02023317 A EP 02023317A EP 1310748 B1 EP1310748 B1 EP 1310748B1
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EP
European Patent Office
Prior art keywords
heat exchanger
tube
collecting tube
collector
projections
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EP02023317A
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German (de)
French (fr)
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EP1310748A3 (en
EP1310748A2 (en
Inventor
Martin Dipl.-Ing Kaspar
Michael Kohl
Gerrit Dr. Ing. Wölk
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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
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Publication of EP1310748A3 publication Critical patent/EP1310748A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • 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
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0214—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/044—Condensers with an integrated receiver
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/044—Condensers with an integrated receiver
    • F25B2339/0442—Condensers with an integrated receiver characterised by the mechanical fixation of the receiver to the header
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/044—Condensers with an integrated receiver
    • F25B2339/0446—Condensers with an integrated receiver characterised by the refrigerant tubes connecting the header of the condenser to the receiver; Inlet or outlet connections to receiver
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2220/00—Closure means, e.g. end caps on header boxes or plugs on conduits

Definitions

  • the invention relates to a heat exchanger, such as in particular a refrigerant condenser, in particular for motor vehicle air conditioners, consisting of a tube-rib block and on both sides arranged manifolds which receive the ends of the tubes of the tube-rib block, and from a parallel to a manifold arranged collector, which is connected via two overflow openings with the manifold in refrigerant communication.
  • a heat exchanger such as in particular a refrigerant condenser, in particular for motor vehicle air conditioners, consisting of a tube-rib block and on both sides arranged manifolds which receive the ends of the tubes of the tube-rib block, and from a parallel to a manifold arranged collector, which is connected via two overflow openings with the manifold in refrigerant communication.
  • Such collectors may be composed of a first, for example, welded tube and a second, for example, short, the two overflow openings having pipe section.
  • a capacitor was by the DE-A 198 48 744 the applicant known.
  • the collector may be integrally formed from a tube, wherein the tube may be formed from a part or from at least two pipe shells.
  • the collector is formed in two pieces: it consists on the one hand of a welded tube, which is adapted in terms of its dimensions, in particular the wall thickness, the prevailing operating pressure, and on the other hand of a short piece of pipe, which is formed as an extrusion part is and has a larger wall thickness.
  • the latter is expedient to be able to work this part mechanically better.
  • the manifold and the collector are thus two separate components which are interconnected and preferably be soldered.
  • soldering fixation of both parts is appropriate to each other before the entire capacitor is spent in the soldering oven for soldering. This fixation takes place in the known capacitor by a tack weld.
  • Such an operation is atypical for a soldered capacitor, i. H. Manufacturing technology disadvantageous because expensive.
  • the collection tube is formed in two parts, that is, on the one hand, a bottom part with passages for the flat tubes and on the other hand, a cover part which is soldered to the bottom part via two longitudinal seams.
  • collar-like passages are introduced, which engage in the overflow openings of the pipe section of the collector and thus ensure even before soldering for a fixation of both parts.
  • the collar-like passages are designed as circumferential collars that protrude at least a portion of their extension in the direction of the collector or a part of the collector.
  • the pipe section which is preferably made by extrusion, a contact surface on which the cover part of the collecting tube conforms with its contour, so that a contact surface for soldering both parts is formed.
  • the projections or passages attached to the collecting tube engage in the overflow openings in such a way that they act as a fixation of both parts and optionally also form a defined solder gap for a secure sealing soldering. It is also advantageous if the. Fit between holes and projections or passages is designed as a clamping fit and thus in addition to the positive connection and a force or friction is effected.
  • the capacitor including collector can thus be optionally soldered without a soldering device or tack welding in a soldering oven.
  • the projections or passages can be particularly easily produced by punch-hole punching when the manifold is formed in two parts, because then enough space for the punch and the stamping tool is available.
  • the Fig. 1 shows a structural unit 1, consisting of a manifold 2, and a collector 3 for a refrigerant condenser, not shown, for an automotive air conditioning system.
  • a collector 3 for a refrigerant condenser not shown, for an automotive air conditioning system.
  • Such capacitors, in which the collector is integrated with the manifold or with the entire capacitor are through the DE-C 42 38 853 the applicant known. This construction will be referred to below.
  • the collecting tube 2 has slit-shaped passages 4 over its entire length, which tubes, not shown, such as flat tubes, receive a tube-rib block of the capacitor.
  • the pipe ends are soldered in these passages.
  • the collector 3 is composed of two parts, namely a thin-walled tube 5, which may for example be welded or soldered or otherwise connected and a short, formed as an extrusion pipe section 6.
  • a cover 7 is arranged on the one hand the Tube 3 closes and on the other hand, the manifold 2 engages with a cap-like extension part 7a and overlaps.
  • Fig. 2 shows the unit 1 according to Fig. 1 partly in an exploded view, wherein in the lower part of the drawing, the manifold 2 and the collector 3 are shown as separate parts.
  • the collecting tube has a cover part 2a, which has two collar-shaped passages 8 and 9 in its lower region. Corresponding to these passages 8 and 9, two holes 10 and 11 are provided in the pipe section 6, which correspond to the outer diameter of the collar 8 and 9 with respect to their inner diameter. Since the manifold 2 is formed in two parts, ie, consists of the bottom part 2b and the cover part 2a, the collar 8 and 9 can be relatively easily produced by a stamping / stamping process.
  • the pipe section 6 has a concave bearing surface 6a, which is adapted to the outer contour of the cover part 2b.
  • projections 8,9 of FIG. 2 instead of the circular passages 8,9 of FIG. 2 only projections provided in the shell of the manifold.
  • the projections are arranged so that they engage in the openings of the collector and fix it to the manifold.
  • two opposing projections can be provided.
  • more than two projections per fluid connection between the manifold and collector may be provided, as shown for example for the projections and the opening. In this case, four star-shaped projections are provided.
  • only one projection on the collecting tube is provided per opening and in which case they engage in the openings in such a way that they fix collector tube and collector relative to one another.
  • Fig. 3 shows a sectional view through the assembly 1 according to Fig. 1 and Fig. 2 , again using like reference numerals for like components.
  • the tube 5 is a welded aluminum tube and made of semi-finished material. It corresponds in terms of its wall thickness to the operating pressure occurring and thus has a minimum weight.
  • This tube 5 is inserted with its front end 5a in the pipe section 6 and soldered to it.
  • the pipe section 6 is made as an extruded part and has 2 holes 10 and 11, in which the collar 8 and 9 of the manifold 2 engage. The collar 8 and 9 thus also serve - even before the soldering - the fixation of the manifold 2 relative to the collector 3 and against the pipe section 6.
  • the manifold 2 is - as already mentioned - in two parts and consists of a cover part 2a and a bottom part 2b, in which slots 4 are punched. How out Fig. 3a can be seen, bottom part 2b and cover part 2a are formed approximately half-shell-shaped and soldered together in the region of a longitudinal seam 2c.
  • the manifold 2 is closed at the front by a cover 12 and 13 respectively. Between the two overflow openings 10 and 11 is located in the manifold 2, a partition wall 14.
  • the bottom 6a of the pipe section 6 and the collector 3 is by a sealing plug, not shown (eg DE-A 100 39 260 the applicant) closed.
  • the upper tube end 5b of the collector 3 is closed by the lid 7, which is pressed like a plug into the tube end 5b and held in a force-locking manner.
  • the lid 7 has a laterally projecting extension 7a, which extends over the entire end face of the collecting tube 2. From the frontal part 7a are tabs 7b ( Fig. 2 and Fig. 3a ) and 7c angled, which correspond in shape to the circumference of the collecting tube 2 and create close to the outer surface of the collecting tube 2.
  • the end cover 7 can be pressed into the pipe end 5b; at the same time engages the cap-like extension piece 7a with its two tabs 7b and 7c, the end of the manifold 2 and fixes this in position. Since the collar 8 and 9 also have a slight excess over the holes 10 and 11, there is also a clamping fit, so that both tubes 2 and 3 are fixed against each other.
  • this assembly 1 can be soldered in one furnace together with the other parts of the capacitor, which also consist of an aluminum alloy. After this soldering on the one hand, the lid forms a tight seal of the tube 3 and on the other hand, the collar 8 and 9 a tight connection with the holes 10 and 11th

Abstract

A collector (3) consisting of a tube (5) to which a tube piece (6) is brazed at the lower end (5a), is connected to a collecting tube (2) of the heat exchanger, by making collars (8,9) formed in the lower area of the collecting tube engaged with bores (10,11) formed in the tube piece. An extension (7a) of a cover (7) which seals an upper end (5b) of the collector is used to seal the upper end of the header. <??>Independent claims are also included for the following: <??>(1) manufacturing method of heat exchanger; and <??>(2) refrigerant condenser in vehicle air conditioning system.

Description

Die Erfindung bezieht sich auf einen Wärmetauscher, wie insbesondere einem Kältemittelkondensator, insbesondere für Kraftfahrzeugklimaanlagen, bestehend aus einem Rohr-Rippen-Block und beiderseits angeordneten Sammelrohren, welche die Enden der Rohre des Rohr-Rippen-Blockes aufnehmen, sowie aus einem parallel zu einem Sammelrohr angeordneten Sammler, welcher über zwei Überströmöffnungen mit dem Sammelrohr in Kältemittelverbindung steht.The invention relates to a heat exchanger, such as in particular a refrigerant condenser, in particular for motor vehicle air conditioners, consisting of a tube-rib block and on both sides arranged manifolds which receive the ends of the tubes of the tube-rib block, and from a parallel to a manifold arranged collector, which is connected via two overflow openings with the manifold in refrigerant communication.

Solche Sammler können aus einem ersten beispielsweise geschweißten Rohr und einem zweiten beispielsweise kurzen, die beiden Überströmöffnungen aufweisenden Rohrstück zusammengesetzt sein. Ein solcher Kondensator wurde durch die DE-A 198 48 744 der Anmelderin bekannt. Auch kann der Sammler einstückig aus einem Rohr gebildet sein, wobei das Rohr aus einem Teil oder aus zumindest zwei Rohrschalen gebildet sein kann.Such collectors may be composed of a first, for example, welded tube and a second, for example, short, the two overflow openings having pipe section. Such a capacitor was by the DE-A 198 48 744 the applicant known. Also, the collector may be integrally formed from a tube, wherein the tube may be formed from a part or from at least two pipe shells.

Der aus der DE 198 48 744 bekannte Kondensator ist unter anderem dadurch gekennzeichnet, dass der Sammler zweistückig ausgebildet ist: er besteht einerseits aus einem geschweißten Rohr, welches hinsichtlich seiner Dimensionierung, wie insbesondere der Wandstärke, dem herrschenden Betriebsdruck angepaßt ist, und andererseits aus einem kurzen Rohrstück, welches als Extrusionsteil ausgebildet ist und eine größere Wandstärke besitzt. Letzteres ist zweckmäßig, um dieses Teil mechanisch besser bearbeiten zu können.The from the DE 198 48 744 known condenser is among other things characterized in that the collector is formed in two pieces: it consists on the one hand of a welded tube, which is adapted in terms of its dimensions, in particular the wall thickness, the prevailing operating pressure, and on the other hand of a short piece of pipe, which is formed as an extrusion part is and has a larger wall thickness. The latter is expedient to be able to work this part mechanically better.

Das Sammelrohr und der Sammler sind somit zwei separate Bauteile, die miteinander verbindbar und vorzugsweise verlötebar sind. Für die Verlötung ist eine Fixierung beider Teile zueinander zweckmäßig, bevor der gesamte Kondensator in den Lötofen zum Löten verbracht wird. Diese Fixierung erfolgt beim bekannten Kondensator durch eine Heftschweißung. Ein solcher Arbeitsgang ist für einen gelöteten Kondensator atypisch, d. h. fertigungstechnisch gesehen nachteilig, da teuer.The manifold and the collector are thus two separate components which are interconnected and preferably be soldered. For the soldering fixation of both parts is appropriate to each other before the entire capacitor is spent in the soldering oven for soldering. This fixation takes place in the known capacitor by a tack weld. Such an operation is atypical for a soldered capacitor, i. H. Manufacturing technology disadvantageous because expensive.

Es ist daher Aufgabe der vorliegenden Erfindung, die Verbindung von Sammelrohr und Sammler bei einem Kondensator der eingangs genannten Art dahingehend zu verbessern, dass sich eine lötgerechte Konstruktion ergibt, die eine Fixierung beider Teile durch Heftschweißen vermeidet.It is therefore an object of the present invention to improve the connection of manifold and collector in a capacitor of the type mentioned in that a solderable construction results, which avoids a fixation of both parts by tack welding.

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Patentanspruches 1. Demzufolge werden Sammelrohr und Sammler über einen Abschlussdeckel gegeneinander fixiert und derart positioniert, dass sie anschließend ohne weitere Fixierhilfen verlötet werden können. Der Abschlussdeckel wird einerseits in das Rohrende des Sammlers eingepresst und umgreift andererseits mit einer seitlichen Verlängerung wie eine Kappe das benachbarte Sammelrohr. Sowohl das im Rohrende eingepresste Verschlussteil als auch die kappenförmige Verlängerung werden mit den beiden Rohrenden verlötet, so dass anschließend eine feste Verbindung zwischen Sammler und Sammelrohr hergestellt ist. Durch diesen Abschlussdeckel ist somit eine lötgerechte Konstruktion geschaffen, so dass auf weitere Fixiermittel, wie zum Beispiel Heftschweißen, verzichtet werden kann.The solution to this problem arises from the features of claim 1. Accordingly, collecting manifold and collector are fixed on a cover against each other and positioned so that they can then be soldered without further Fixierhilfen. On the one hand, the end cover is pressed into the pipe end of the collector and, on the other hand, surrounds the adjacent manifold with a lateral extension, such as a cap. Both the pressed in the pipe end closure member and the cap-shaped extension are soldered to the two pipe ends, so that then a solid connection between the collector and collector is made. By this end cover thus a solderable construction is created, so that can be dispensed with further fixative, such as tack welding.

Nach einer vorteilhaften Ausgestaltung der Erfindung ist das Sammelrohr zweiteilig ausgebildet, d. h. es weist einerseits ein Bodenteil mit Durchzügen für die Flachrohre auf und andererseits ein Deckelteil, welches mit dem Bodenteil über zwei Längsnähte verlötet wird. In das Deckelteil sind kragenartige Durchzüge eingebracht, die in die Überströmöffnungen des Rohrstückes des Sammlers eingreifen und somit auch bereits vor dem Löten für eine Fixierung beider Teile sorgen. Die kragenartigen Durchzüge sind dabei als umlaufende Kragen ausgebildet, die zumindest einen Teilbereich ihrer Erstreckung in Richtung auf den Sammler bzw. ein Teil des Sammlers hervorstehen.According to an advantageous embodiment of the invention, the collection tube is formed in two parts, that is, on the one hand, a bottom part with passages for the flat tubes and on the other hand, a cover part which is soldered to the bottom part via two longitudinal seams. In the lid part collar-like passages are introduced, which engage in the overflow openings of the pipe section of the collector and thus ensure even before soldering for a fixation of both parts. The collar-like passages are designed as circumferential collars that protrude at least a portion of their extension in the direction of the collector or a part of the collector.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung weist das Rohrstück, welches vorzugsweise durch Extrusion hergestellt ist, eine Anlagefläche auf, an welche sich das Deckelteil des Sammelrohres mit seiner Kontur anschmiegt, so dass eine Kontaktfläche zum Verlöten beider Teile gebildet wird.In a further advantageous embodiment of the invention, the pipe section, which is preferably made by extrusion, a contact surface on which the cover part of the collecting tube conforms with its contour, so that a contact surface for soldering both parts is formed.

Die am Sammelrohr angebrachten Vorsprünge oder Durchzüge greifen derart in die Überströmöffnungen ein, dass sie als Fixierung beider Teile wirken und gegebenenfalls darüber hinaus einen definierten Lotspalt für eine sichere Dichtlötung bilden. Vorteilhaft ist es ferner, wenn die. Passung zwischen Bohrungen und Vorsprüngen oder Durchzügen als Klemmsitz ausgebildet ist und somit zusätzlich zum Formschluss auch ein Kraft- bzw. Reibschluss bewirkt wird.The projections or passages attached to the collecting tube engage in the overflow openings in such a way that they act as a fixation of both parts and optionally also form a defined solder gap for a secure sealing soldering. It is also advantageous if the. Fit between holes and projections or passages is designed as a clamping fit and thus in addition to the positive connection and a force or friction is effected.

Der Kondensator einschließlich Sammler kann somit gegebenenfalls ohne eine Lötvorrichtung oder Heftschweißen im Lötofen gelötet werden. Die Vorsprünge oder Durchzüge lassen sich besonders einfach durch Loch-Stanz-Prägen herstellen, wenn das Sammelrohr zweiteilig ausgebildet ist, weil dann genügend Platz für den Lochstempel und das Prägewerkzeug zur Verfügung steht.The capacitor including collector can thus be optionally soldered without a soldering device or tack welding in a soldering oven. The projections or passages can be particularly easily produced by punch-hole punching when the manifold is formed in two parts, because then enough space for the punch and the stamping tool is available.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und wird im Folgenden näher beschrieben. Es zeigen:

Fig. 1
eine perspektivische Gesamtansicht der Einheit Sammelrohr und Sammler,
Fig. 2
eine Explosionsdarstellung der Einheit Sammelrohr und Sammler,
Fig. 3
einen Schnitt durch die Einheit Sammelrohr und Sammler und
Fig. 3a
einen Querschnitt durch die Einheit gemäß Fig. 3 entlang der Linie I - I.
Embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it:
Fig. 1
an overall perspective view of the unit manifold and collector,
Fig. 2
an exploded view of the unit header and collector,
Fig. 3
a section through the unit manifold and collectors and
Fig. 3a
a cross section through the unit according to Fig. 3 along the line I - I.

Die Fig. 1 zeigt eine Baueinheit 1, bestehend aus einem Sammelrohr 2, und einem Sammler 3 für einen nicht dargestellten Kältemittelkondensator für eine Kraftfahrzeugklimaanlage. Solche Kondensatoren, bei denen der Sammler mit dem Sammelrohr bzw. mit dem gesamten Kondensator integriert ist, sind durch die DE-C 42 38 853 der Anmelderin bekannt. Auf diese Bauweise wird im Folgenden Bezug genommen.The Fig. 1 shows a structural unit 1, consisting of a manifold 2, and a collector 3 for a refrigerant condenser, not shown, for an automotive air conditioning system. Such capacitors, in which the collector is integrated with the manifold or with the entire capacitor are through the DE-C 42 38 853 the applicant known. This construction will be referred to below.

Das Sammelrohr 2 weist über seine gesamte Länge schlitzförmige Durchzüge 4 auf, welche nicht dargestellte Rohre, wie Flachrohre, eines Rohr-Rippen-Blockes des Kondensators aufnehmen. Die Rohrenden sind in diesen Durchzügen verlötet. Der Sammler 3 ist aus zwei Teilen zusammengesetzt, nämlich einem dünnwandigen Rohr 5, das beispielsweise geschweißt oder gelötet oder anderweitig verbunden sein kann und einem kurzen, als Extrusionsteil ausgebildeten Rohrstück 6. Am oberen Ende des Rohres 3 ist ein Abschlussdeckel 7 angeordnet, der einerseits das Rohr 3 verschließt und andererseits das Sammelrohr 2 mit einem kappenartigen Verlängerungsteil 7a umgreift und übergreift.The collecting tube 2 has slit-shaped passages 4 over its entire length, which tubes, not shown, such as flat tubes, receive a tube-rib block of the capacitor. The pipe ends are soldered in these passages. The collector 3 is composed of two parts, namely a thin-walled tube 5, which may for example be welded or soldered or otherwise connected and a short, formed as an extrusion pipe section 6. At the upper end of the tube 3, a cover 7 is arranged on the one hand the Tube 3 closes and on the other hand, the manifold 2 engages with a cap-like extension part 7a and overlaps.

Fig. 2 zeigt die Baueinheit 1 gemäß Fig. 1 zum Teil in einer Explosivdarstellung, wobei im unteren Teil der Zeichnung das Sammelrohr 2 und der Sammler 3 als separate Teile dargestellt sind. Das Sammelrohr weist ein Deckelteil 2a auf, welches in seinem unteren Bereich zwei kragenförmige Durchzüge 8 und 9 aufweist. Korrespondierend zu diesen Durchzügen 8 und 9 sind in dem Rohrstück 6 zwei Bohrungen 10 und 11 vorgesehen, die bezüglich ihres Innendurchmessers dem Außendurchmesser der Kragen 8 und 9 entsprechen. Da das Sammelrohr 2 zweiteilig ausgebildet ist, d. h. aus dem Bodenteil 2b und dem Deckelteil 2a besteht, lassen sich die Kragen 8 und 9 relativ einfach durch einen Stanz/Prägevorgang herstellen. Das Rohrstück 6 weist eine konkave Anlagefläche 6a auf, die der Außenkontur des Deckelteiles 2b angepaßt ist. Fig. 2 shows the unit 1 according to Fig. 1 partly in an exploded view, wherein in the lower part of the drawing, the manifold 2 and the collector 3 are shown as separate parts. The collecting tube has a cover part 2a, which has two collar-shaped passages 8 and 9 in its lower region. Corresponding to these passages 8 and 9, two holes 10 and 11 are provided in the pipe section 6, which correspond to the outer diameter of the collar 8 and 9 with respect to their inner diameter. Since the manifold 2 is formed in two parts, ie, consists of the bottom part 2b and the cover part 2a, the collar 8 and 9 can be relatively easily produced by a stamping / stamping process. The pipe section 6 has a concave bearing surface 6a, which is adapted to the outer contour of the cover part 2b.

Gemäß einem weiteren Ausführungsbeispiel der Erfindung, sind statt der kreisrunden Durchzüge 8,9 der Figur 2 lediglich Vorsprünge in der Schale des Sammelrohres vorgesehen. Die Vorsprünge sind dabei so angeordnet, daß sie in die Öffnungen des Sammlers eingreifen und diesen zu dem Sammelrohr fixieren. Vorteilhaft können dabei zwei gegenüberliegende Vorsprünge vorgesehen sein. Bei einem anderen Ausführungsbeispiel können auch mehr als zwei Vorsprünge pro Fluidverbindung zwischen Sammelrohr und Sammler vorgesehen sein, wie es beispielsweise für die Vorsprünge und die Öffnung dargestellt ist. Dabei sind vier sternförmig angeordnete Vorsprünge vorgesehen.According to a further embodiment of the invention, instead of the circular passages 8,9 of FIG. 2 only projections provided in the shell of the manifold. The projections are arranged so that they engage in the openings of the collector and fix it to the manifold. Advantageously, two opposing projections can be provided. In another embodiment, more than two projections per fluid connection between the manifold and collector may be provided, as shown for example for the projections and the opening. In this case, four star-shaped projections are provided.

Bei einem weiteren nicht dargestellten Ausführungsbeispiel ist auch pro Öffnung nur jeweils nur ein Vorsprung an dem Sammelrohr vorgesehen, wobei diese derart in die Öffnungen eingreifen, daß sie Sammlerohr und Sammler relativ zueinander fixieren.In another embodiment, not shown, only one projection on the collecting tube is provided per opening and in which case they engage in the openings in such a way that they fix collector tube and collector relative to one another.

Fig. 3 zeigt eine Schnittdarstellung durch die Baueinheit 1 gemäß Fig. 1 und Fig. 2, wobei wiederum gleiche Bezugszeichen für gleiche Bauteile verwendet werden. Das Rohr 5 ist ein geschweißtes Aluminiumrohr und aus Halb zeugmaterial hergestellt. Es entspricht hinsichtlich seiner Wandstärke dem auftretenden Betriebsdruck und weist somit ein minimales Gewicht auf. Dieses Rohr 5 ist mit seinem stirnseitigen Ende 5a in das Rohrstück 6 eingesetzt und mit diesem verlötet. Das Rohrstück 6 ist als extrudiertes Teil hergestellt und weist 2 Bohrungen 10 und 11 auf, in welche die Kragen 8 und 9 des Sammelrohres 2 eingreifen. Die Kragen 8 und 9 dienen somit auch - bereits vor der Verlötung - der Fixierung des Sammelrohres 2 gegenüber dem Sammler 3 bzw. gegenüber dem Rohrstück 6. Das Sammelrohr 2 ist - wie bereits erwähnt - zweiteilig ausgebildet und besteht aus einem Deckelteil 2a und einem Bodenteil 2b, in welches Schlitze 4 gestanzt sind. Wie aus Fig. 3a ersichtlich, sind Bodenteil 2b und Deckelteil 2a etwa halbschalenförmig ausgebildet und im Bereich einer Längsnaht 2c miteinander verlötet. Das Sammelrohr 2 ist stirnseitig jeweils durch einen Deckel 12 und 13 verschlossen. Zwischen den beiden Überströmöffnungen 10 und 11 befindet sich im Sammelrohr 2 eine Trennwand 14. Der Boden 6a des Rohrstückes 6 bzw. des Sammlers 3 wird durch einen nicht dargestellten Verschlussstopfen (z. B. gemäß DE-A 100 39 260 der Anmelderin) verschlossen. Das obere Rohrende 5b des Sammlers 3 ist durch den Deckel 7 verschlossen, der wie ein Stopfen in das Rohrende 5b hineingedrückt und kraftschlüssig gehalten wird. Der Deckel 7 weist eine seitlich abragende Verlängerung 7a auf, die sich über die gesamte Stirnfläche des Sammelrohres 2 erstreckt. Von dem stirnseitigen Teil 7a sind Lappen 7b (Fig. 2 und Fig. 3a) und 7c abgewinkelt, die in ihrer Form dem Umfang des Sammelrohres 2 entsprechen und sich eng an die Außenfläche des Sammelrohres 2 anlegen. Bei der Montage der beiden Rohre 2 und 3 werden diese zunächst in der Weise positioniert, dass die Kragen 8 und 9 in Eingriff mit den Bohrungen 10 und 11 gebracht werden. Damit liegen beide Rohre 2 und 3 etwa parallel zueinander. Dann kann als nächster Montageschritt der Abschlussdeckel 7 in das Rohrende 5b eingedrückt werden; gleichzeitig umgreift das kappenartige Verlängerungsstück 7a mit seinen beiden Lappen 7b und 7c das Ende des Sammelrohres 2 und fixiert dieses in seiner Position. Da die Kragen 8 und 9 ebenfalls ein leichtes Übermaß gegenüber den Bohrungen 10 und 11 haben, ergibt sich auch dort ein Klemmsitz, so dass beide Rohre 2 und 3 gegeneinander fixiert sind. Nach der Komplettierung zu einem vollständigen Kondensator kann diese Baueinheit 1 im Ofen zusammen mit den übrigen Teilen des Kondensators, die ebenfalls aus einer Aluminiumlegierung bestehen, in einem Arbeitsgang verlötet werden. Nach dieser Lötung bildet einerseits der Deckel einen dichten Abschluß des Rohres 3 und andererseits die Kragen 8 und 9 eine dichte Verbindung mit den Bohrungen 10 und 11. Fig. 3 shows a sectional view through the assembly 1 according to Fig. 1 and Fig. 2 , again using like reference numerals for like components. The tube 5 is a welded aluminum tube and made of semi-finished material. It corresponds in terms of its wall thickness to the operating pressure occurring and thus has a minimum weight. This tube 5 is inserted with its front end 5a in the pipe section 6 and soldered to it. The pipe section 6 is made as an extruded part and has 2 holes 10 and 11, in which the collar 8 and 9 of the manifold 2 engage. The collar 8 and 9 thus also serve - even before the soldering - the fixation of the manifold 2 relative to the collector 3 and against the pipe section 6. The manifold 2 is - as already mentioned - in two parts and consists of a cover part 2a and a bottom part 2b, in which slots 4 are punched. How out Fig. 3a can be seen, bottom part 2b and cover part 2a are formed approximately half-shell-shaped and soldered together in the region of a longitudinal seam 2c. The manifold 2 is closed at the front by a cover 12 and 13 respectively. Between the two overflow openings 10 and 11 is located in the manifold 2, a partition wall 14. The bottom 6a of the pipe section 6 and the collector 3 is by a sealing plug, not shown (eg DE-A 100 39 260 the applicant) closed. The upper tube end 5b of the collector 3 is closed by the lid 7, which is pressed like a plug into the tube end 5b and held in a force-locking manner. The lid 7 has a laterally projecting extension 7a, which extends over the entire end face of the collecting tube 2. From the frontal part 7a are tabs 7b ( Fig. 2 and Fig. 3a ) and 7c angled, which correspond in shape to the circumference of the collecting tube 2 and create close to the outer surface of the collecting tube 2. During assembly of the two tubes 2 and 3, these are initially positioned in such a way that the collars 8 and 9 are brought into engagement with the bores 10 and 11. So that both tubes 2 and 3 are approximately parallel to each other. Then, as the next assembly step, the end cover 7 can be pressed into the pipe end 5b; at the same time engages the cap-like extension piece 7a with its two tabs 7b and 7c, the end of the manifold 2 and fixes this in position. Since the collar 8 and 9 also have a slight excess over the holes 10 and 11, there is also a clamping fit, so that both tubes 2 and 3 are fixed against each other. After completion to a complete capacitor, this assembly 1 can be soldered in one furnace together with the other parts of the capacitor, which also consist of an aluminum alloy. After this soldering on the one hand, the lid forms a tight seal of the tube 3 and on the other hand, the collar 8 and 9 a tight connection with the holes 10 and 11th

Zwischen den Rohren 5 und 2 bzw. dessen Deckelteil 2a befindet sich ein Spalt 15, der etwa der Wandstärke des Rohres 5 entspricht.Between the tubes 5 and 2 or its cover part 2a, there is a gap 15 which corresponds approximately to the wall thickness of the tube 5.

Es sei darauf hingewiesen, dass grundsätzlich eine der beiden oben erwähnten Fixiermaßnahmen - sei es der Deckel 7, 7a oder seien es die Durchzüge 8, 9 - für sich allein oder zusammen mit einer anderen Fixierung ausreichend sind, um damit eine einwandfreie Lötung durchführen zu können.It should be noted that, in principle, one of the two fixing measures mentioned above-be it the cover 7, 7a or the passages 8, 9 -are sufficient on their own or together with another fixation in order to be able to carry out faultless soldering ,

Claims (15)

  1. A heat exchanger, in particular a coolant condenser, in particular for a motor vehicle air-conditioning unit, which heat exchanger consists of a block of tubes and fins and of collecting tubes which are arranged on both sides and receive the ends of the tubes, and of a collector (3) which is arranged parallel to a collecting tube (2), is in coolant communication with the collecting tube via two overflow openings, wherein the collector is made up of a tube (5) and of a short tube piece (6) which comprises the two overflow openings, wherein the tube (5) is inserted into the tube piece and soldered thereto, characterised in that a cover lid (7) with a lateral extension part (7a) is connected, for example soldered, both to the tube and also to the collecting tube.
  2. The heat exchanger as claimed in claim 1, characterised in that the cover lid (7) has a closure part which is pressed into the tube end.
  3. The heat exchanger as claimed in claim 1 or 2, characterised in that the lateral extension piece is designed like a cap with lateral flaps (7b) which engage around the collecting tube and are soldered to the latter.
  4. The heat exchanger as claimed in claim 1, 2 or 3, characterised in that the cover lid with the extension part serves for preliminary fixing of collecting tube and collector.
  5. The heat exchanger as claimed in claim 1, 2, 3 or 4, characterised in that the collecting tube is in two parts, i.e. designed with a lid part (2a) and a base part (2b).
  6. The heat exchanger as claimed in one of the preceding claims, characterised in that the collecting tube or the lid part of the collecting tube has two apertures (8, 9) or a plurality of projections which engage in the overflow openings of the collector.
  7. The heat exchanger as claimed in one of the preceding claims, characterised in that the tube piece has a bearing surface (6a) adapted to the outer contour of the collecting tube.
  8. A heat exchanger according to one of the preceding claims, characterised in that the collecting tube further has apertures and/or projections which engage in the overflow openings of the tube piece.
  9. The heat exchanger as claimed in claim 8, characterised in that the overflow openings are designed as openings such as bores (10, 11) or punched holes.
  10. The heat exchanger as claimed in claim 6, 8 or 9, characterised in that the apertures are designed as peripheral collars (8, 4) which are designed to be able to engage with a form fit and/or force fit into the openings.
  11. The heat exchanger as claimed in claim 8, 9 or 10, characterised in that the projections are designed as parts which are oriented substantially perpendicular to the longitudinal axis of the collector and which are designed to be able to engage with a form fit and/or force fit into the openings.
  12. The heat exchanger as claimed in one of claims 6 through 11, characterised in that the apertures and/or projections in connection with the overflow openings afford a preliminary fixing of collector and collecting tube.
  13. The heat exchanger as claimed in one of claims 6 through 12, characterised in that the collecting tube is soldered tightly into the overflow openings by way of the apertures or projections.
  14. The heat exchanger as claimed in one of claims 6 through 13, characterised in that the collecting tube is designed in at least two parts, for example with a lid part and a base part, and in that the apertures and/or projections are arranged in the lid part.
  15. The heat exchanger as claimed in one of the preceding claims, characterised in that the apertures and/or projections are produced by deep-drawing or punching/embossing.
EP02023317A 2001-11-08 2002-10-18 Heat exchanger Expired - Lifetime EP1310748B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10154891 2001-11-08
DE10154891 2001-11-08
DE10229831 2002-07-03
DE10229831 2002-07-03

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EP1310748A2 EP1310748A2 (en) 2003-05-14
EP1310748A3 EP1310748A3 (en) 2004-01-02
EP1310748B1 true EP1310748B1 (en) 2009-08-26

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US (1) US6851468B2 (en)
EP (1) EP1310748B1 (en)
AT (1) ATE441073T1 (en)
DE (1) DE50213792D1 (en)

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Also Published As

Publication number Publication date
DE50213792D1 (en) 2009-10-08
EP1310748A3 (en) 2004-01-02
US6851468B2 (en) 2005-02-08
EP1310748A2 (en) 2003-05-14
ATE441073T1 (en) 2009-09-15
US20030085026A1 (en) 2003-05-08

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