EP1785687B1 - Brazed plate heat exchanger - Google Patents

Brazed plate heat exchanger Download PDF

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Publication number
EP1785687B1
EP1785687B1 EP20060021302 EP06021302A EP1785687B1 EP 1785687 B1 EP1785687 B1 EP 1785687B1 EP 20060021302 EP20060021302 EP 20060021302 EP 06021302 A EP06021302 A EP 06021302A EP 1785687 B1 EP1785687 B1 EP 1785687B1
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EP
European Patent Office
Prior art keywords
plate
heat exchanger
connection
brazed
plates
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 - Fee Related
Application number
EP20060021302
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German (de)
French (fr)
Other versions
EP1785687B2 (en
EP1785687A1 (en
Inventor
Thomas Dipl.-Ing. Ritter
Rainer Dipl.-Ing. Glück
Alfredo Ghidini
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Modine Manufacturing Co
Original Assignee
Modine Manufacturing Co
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Publication of EP1785687A1 publication Critical patent/EP1785687A1/en
Publication of EP1785687B1 publication Critical patent/EP1785687B1/en
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Publication of EP1785687B2 publication Critical patent/EP1785687B2/en
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Classifications

    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
    • 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
    • F28D2021/0089—Oil coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing

Definitions

  • the invention relates to a brazed plate heat exchanger with the features of the preamble of claim 1.
  • the generic term corresponds to the heat exchanger, which consists of the US 2003 / 0070793A1 is known. From the EP 0 347 961 A1 another soldered plate heat exchanger is known, which has some features of the preamble. Furthermore, go out of the DE 195 39 255 A1 as well as from the US 2003 / 0159807A1 further plate heat exchanger out.
  • the heat exchangers in the cited publications can be improved with regard to their manufacturability.
  • a plate heat exchanger is also from the DE 198 05 439B4 and from a number of other publications known.
  • the connection piece with the connection plate is first to be connected to a unit by means of forming operations before the pre-assembly of the plate heat exchanger, consisting of the heat exchanger plates, the assembly, as well as cover and base plate or connection plate, etc. can begin.
  • the plate heat exchanger is soldered in a soldering oven.
  • the object of the invention is to propose a brazed plate heat exchanger whose production costs, in particular in the pre-assembly, is reduced.
  • the edge of the opening has a reduction in plate thickness
  • the terminal portion of the terminal is disposed in the area of the reduced plate thickness, with the reduction of the plate thickness formed on the side of the terminal plate facing or facing away from the plate heat exchanger.
  • a prior fixation of the connection piece is made.
  • the pre-assembly of the plate heat exchanger can thus be done without prior creation of a unit of pipe and connection plate, whereby the manufacturing cost was lowered.
  • the deformation of the connecting piece from the preferred first alternative which is advantageous.
  • too no dome-like deformation of the terminal plate - as in the prior art - required which also with this alternative, the manufacturing cost, including the cost of forming heard, can be reduced.
  • connection piece has an anti-twist protection consisting of correlating deformations on the connection plate and on the connection piece. This may be, for example, shaped nubs or a free cut in the connection area, which corresponds to the shaping of the reduced board thickness range.
  • the items of the brazed plate heat exchanger according to the invention are preferably made of an aluminum material has the favorable forming properties. However, the use of other metallic materials is not excluded.
  • the degree of reduction of the plate thickness corresponds approximately to the extent of the wall thickness of the connection piece in the connection area, so that the connection area of the connection piece lies approximately at the level of the surface of the connection plate or has only a slight offset in the level.
  • This design has the advantage that the heat exchanger plate applied there can be well attached with its opening.
  • the heat exchanger plates of the plate heat exchangers discussed here have openings which form vertical flow channels in the stack of heat exchanger plates for the entry or exit of the corresponding media, which flow in and out through the connecting piece.
  • the connection region of the connecting piece extends in a flange around the wall of the connection piece and projects approximately at right angles from it.
  • the wall thickness of the connection area of the connection piece can be smaller than the wall thickness in the remaining area of the connection piece.
  • connection plate The reduction of the plate thickness at the edge of the opening should preferably be provided on the side of the connection plate, which points to the plate heat exchanger.
  • fastening measures are avoided because the connection area of the connecting piece comes to lie against the adjacent heat exchanger plate in the course of the pre-assembly.
  • connection plate is an approximately flat plate, which, however, may have a raised edge as needed.
  • fastening measures in the form of punctiform impressions between the connection area of the connecting piece and the edge of the opening may be necessary in order to pre-fix the connecting piece and to carry out the soldering process.
  • connection plate has at least two indentations which project in the direction of the heat exchanger plate.
  • the voltage applied to the connection plate heat exchanger plate has at least two holes which receive the indentations in order to achieve a position assurance of the heat exchanger plates with the connection plate.
  • connection plate heat exchanger plate is thicker than the other heat exchanger plates to improve the strength of the heat exchanger against vibration.
  • connection plate may be formed of several, for example, two identical brazed plates (double plate), which has proven to be advantageous for manufacturing reasons.
  • double plate two identical brazed plates
  • the reduced wall thickness in the opening edge is created by different opening diameters in the plates. Otherwise, the reduced wall thickness can be created for example by blanking or pressing.
  • connection plate has fastening openings for fastening the plate heat exchanger.
  • the heat exchanger plates have trough shape and are stacked one inside the other.
  • the connecting piece has in its wegstrebenden from the connection portion no on the use depth of the connecting piece limiting stop area in its wall, which is otherwise required in many solutions from the prior art.
  • the Fig. 1 shows a plan view of a heat exchanger.
  • the FIGS. 2 and 3 show sections through the heat exchanger according to the names given there.
  • the Fig. 4a shows a part of the Fig. 4 to demonstrate a further development described below.
  • the Fig. 5 shows a section of a heat exchanger in the form of a sketch in an alternative design.
  • Soldered plate heat exchangers consequently consist of solderable metals, with aluminum plates suitably coated with solder material being the preferred choice.
  • Extremely thin-walled, trough-shaped heat exchanger plates 1 are stacked in one another, so that their bottoms have a certain distance from each other.
  • a flow channel 70, 80 is formed for oil or for a liquid heat exchange medium.
  • Such flow channels 70, 80 are known to alternate, as well as in the Fig. 5 has been indicated. They are equipped in a manner not shown either with heat exchange ribs or with deformations of the soil to improve the heat exchange.
  • a connection plate 5 is known to be arranged, which is thicker than the heat exchanger plates 1 in order to take over different attachment functions.
  • the terminal plate 5 and the heat exchanger plates 1, 11 have circular openings, which were generally marked with the reference numeral 3 .
  • these openings 3 then each form a supply or discharge channel, which has been generally designated 30 and of which a total of four are present.
  • the supply or discharge channels 30 are in hydraulic communication with the flow channels 70 and 80, as well as from Fig. 5 can be seen, and as it has long been part of the state of the art.
  • the flow channels 80 were closed with respect to the supply or discharge channel 30 .
  • the other flow channels 70 are open there. The manner of the mentioned closure often takes place by appropriate deformation of the opening edges.
  • connection plate 5 heat exchanger plate was made slightly thicker than the other heat exchanger plates 1, which is why the reference numeral 11 was used.
  • FIG. 1 were marked with the reference numeral 53 breakthroughs in the connection plate 5 , by means of which the already mentioned attachment of the entire plate heat exchanger should be made.
  • Another attachment function of the connection plate 5 is that for the connection piece 2. The manner of this attachment will be described in more detail below.
  • the attachment of the connecting piece 2 is formed at the lower or upper connecting plate 5, that the reduction of the plate thickness p at the edge 33 of the opening 3 on the side 55 of the terminal plate 5 is provided, which is turned to the plate heat exchanger.
  • connection piece 2 is inserted through the opening 3 in the connection plate 5 so that it comes to lie with its connection region 22 in the region of the reduced plate thickness p at the opening edge 33 or abuts there.
  • Fig. 5 made the mentioned reduction on the other side 56 of the connection plate 5 , which points away from the plate heat exchanger.
  • the reduction of the plate thickness p is made in these cases by a forming process, for example by area embossing.
  • the connecting piece 2 must not be inserted through the opening 3 , but it can be recognized from the outside with its connection region 22 in the region of the reduced plate thickness p . So that it remains prefixed in its position until the soldering process is completed, for example, two embossing points 20 are mounted between the connection region 22 and the opening edge 33 in the connection plate 2 .
  • the impressing points 20 are also effective as anti-rotation and in the Fig. 1 recognizable because the area of one of the connecting pieces 2 has been broken out and is visible.
  • a hedge against falling out of the connecting piece 2 is in the Fig. 1 on the other hand not required, since the falling out by means of the plate stack is to be prevented.
  • FIGS. 2 and 3 is another development recognizable that supports the simplified pre-assembly of the items of the plate heat exchanger.
  • connection plate 2 On the connection plate 2 , two inwardly directed indentations 51 have been formed, which engage in holes 12 or in corresponding impressions 12 in the lowermost, somewhat thicker heat exchanger plate 11 . The slippage of the stack of heat exchanger plates on the connection plate 2 is thereby prevented.
  • the 4 and 4a also show a development and thus do not completely correspond to the drawn section GG from the Fig. 1 , A dashed line in the Fig.
  • connection plate 5 may consist of an upper plate 5.1 and a lower plate 5.2 (double plate), which are identical in terms of their outer shape and are joined together.
  • the Fig. 4a shows a broken out plan view of the formed as a double plate connection plate 5 in the region of an opening 3, in which the connecting piece 2 is used.
  • the reduction of the plate thickness p in the opening edge 33 was not provided by embossing or pressing, but by the lower plate 5.2 having an opening diameter d smaller than the opening diameter D in the upper plate 5.1.
  • top and bottom are interchangeable, the different opening diameter D, d.
  • the number of plates need not be limited to two.
  • the degree of reduction of the plate thickness p corresponds to the dimension of the wall thickness of the connection piece 2 in the connection region 22 , so that the connection region 22 of the connection piece 2 terminates with the level of the surface of the connection plate 5 .
  • a slight offset in the level is present, the dimensions mentioned are different.
  • connection region 22 of the connecting piece 2 extends approximately at right angles from the wall of the connecting piece 2, without a limitation thereon directed to be intended.
  • the wall thickness in the connection region 22 of the connecting piece 2 can be compared the wall thickness of the connecting piece 2 in other areas are also reduced.
  • Such connecting pieces 2 can be produced by means of known methods of forming technology.

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

Description

Die Erfindung betrifft einen gelöteten Plattenwärmetauscher mit den Merkmalen aus dem Oberbegriff des Anspruchs 1.The invention relates to a brazed plate heat exchanger with the features of the preamble of claim 1.

Der Oberbegriff entspricht dem Wärmetauscher, der aus der US 2003/0070793A1 bekannt ist. Aus dem EP 0 347 961 A1 ist ein anderer gelöteter Plattenwärmetauscher bekannt, der einige Merkmale des Oberbegriffes aufweist. Ferner gehen aus der DE 195 39 255 A1 sowie aus der US 2003/0159807A1 weitere Plattenwärmetauscher hervor. Die Wärmetauscher in den genannten Veröffentlichungen sind bezüglich ihrer Herstellbarkeit verbesserungsfähig.The generic term corresponds to the heat exchanger, which consists of the US 2003 / 0070793A1 is known. From the EP 0 347 961 A1 another soldered plate heat exchanger is known, which has some features of the preamble. Furthermore, go out of the DE 195 39 255 A1 as well as from the US 2003 / 0159807A1 further plate heat exchanger out. The heat exchangers in the cited publications can be improved with regard to their manufacturability.

Ein Plattenwärmetauscher ist auch aus der DE 198 05 439B4 und aus einer Reihe weiterer Veröffentlichungen bekannt. Bei dem aus der genannten Schrift bekannten Plattenwärmetauscher soll der Anschlussstutzen mit der Anschlussplatte zunächst zu einer Baueinheit mittels umformtechnischer Operationen verbunden werden, bevor die Vormontage des Plattenwärmetauschers, bestehend aus den Wärmetauscherplatten, der Baueinheit, sowie Deck - und Grundplatte oder Anschlussplatte usw. beginnen kann. Nach der Vormontage wird der Plattenwärmetauscher in einem Lötofen gelötet. Diese Vorgehensweise ist zwar je nach den Umständen in vielen Fällen durchaus sinnvoll, sie wird aber wegen der notwendigen Bereitstellung der Baueinheit, verbunden mit der Durchführung von Umformoperationen, die dort mit domartigen Verformungen der Anschlussplatte in deren Anschlussbereich einhergehen, als recht aufwendig angesehen.A plate heat exchanger is also from the DE 198 05 439B4 and from a number of other publications known. In the plate heat exchanger known from the cited document, the connection piece with the connection plate is first to be connected to a unit by means of forming operations before the pre-assembly of the plate heat exchanger, consisting of the heat exchanger plates, the assembly, as well as cover and base plate or connection plate, etc. can begin. After pre-assembly, the plate heat exchanger is soldered in a soldering oven. Although this approach may make sense in many cases, depending on the circumstances, it is considered to be quite complicated because of the necessary provision of the assembly, combined with the implementation of forming operations, which are associated there with dome-shaped deformations of the connection plate in their connection area.

Die Aufgabe der Erfindung besteht darin, einen gelöteten Plattenwärmetauscher vorzuschlagen, dessen Herstellungsaufwand, insbesondere in der Vormontage, reduziert ist.The object of the invention is to propose a brazed plate heat exchanger whose production costs, in particular in the pre-assembly, is reduced.

Die erfindungsgemäße Lösung erfolgt mit den Merkmalen des Anspruchs 1.The solution according to the invention is carried out with the features of claim 1.

Der Rand der Öffnung weist eine Reduktion der Plattendicke auf und der Anschlussbereich des Anschlussstutzens ist in dem Bereich der reduzierten Plattendicke angeordnet, wobei die Reduktion der Plattendicke an der Seite der Anschlussplatte ausgebildet ist, die entweder zum Plattenwärmetauscher zeigt oder davon wegweist. Im letztgenannten Fall wird eine vorherige Fixierung des Anschlussstutzens vorgenommen. Die Vormontage des Plattenwärmetauschers kann somit ohne vorherige Schaffung einer Baueinheit aus Stutzen und Anschlussplatte erfolgen, wodurch der Herstellungsaufwand gesenkt wurde. Es kann dabei jedoch die Umformung des Anschlussstutzens aus der bevorzugten ersten Alternative beibehalten werden, was vorteilhaft ist. Außerdem ist auch in diesem Fall keine domartige Verformung der Anschlussplatte - wie beim Stand der Technik - erforderlich, wodurch auch mit dieser Alternative der Herstellungsaufwand, wozu der Aufwand für die Umformung gehört, gesenkt werden kann. Der Anschlussstutzen besitzt eine Verdrehsicherung, die aus korrelierenden Umformungen an der Anschlussplatte und am Anschlussstutzen bestehen. Es kann sich dabei beispielsweise um ausgeformte Noppen handeln oder auch um einen Freischnitt im Anschlussbereich, der mit der Formgebung des reduzierten Plattendickenbereiches übereinstimmt.The edge of the opening has a reduction in plate thickness, and the terminal portion of the terminal is disposed in the area of the reduced plate thickness, with the reduction of the plate thickness formed on the side of the terminal plate facing or facing away from the plate heat exchanger. In the latter case, a prior fixation of the connection piece is made. The pre-assembly of the plate heat exchanger can thus be done without prior creation of a unit of pipe and connection plate, whereby the manufacturing cost was lowered. However, it can be retained in this case, the deformation of the connecting piece from the preferred first alternative, which is advantageous. Also, in this case too no dome-like deformation of the terminal plate - as in the prior art - required, which also with this alternative, the manufacturing cost, including the cost of forming heard, can be reduced. The connection piece has an anti-twist protection consisting of correlating deformations on the connection plate and on the connection piece. This may be, for example, shaped nubs or a free cut in the connection area, which corresponds to the shaping of the reduced board thickness range.

Die Einzelteile des erfindungsgemäßen gelöteten Plattenwärmetauschers bestehen vorzugsweise aus einem Aluminiumwerkstoff der günstige Umformeigenschaften besitzt. Der Einsatz anderer metallischer Werkstoffe ist jedoch nicht ausgeschlossen.The items of the brazed plate heat exchanger according to the invention are preferably made of an aluminum material has the favorable forming properties. However, the use of other metallic materials is not excluded.

Das Maß der Reduktion der Plattendicke entspricht etwa dem Maß der Wanddicke des Anschlussstutzens im Anschlussbereich, sodass der Anschlussbereich des Anschlussstutzens etwa auf dem Niveau der Oberfläche der Anschlussplatte liegt oder lediglich einen geringfügigen Versatz im Niveau aufweist. Diese Ausbildung hat den Vorteil, dass sich die dort anliegende Wärmetauscherplatte mit ihrer Öffnung gut anfügen lässt. Bekanntlich besitzen die Wärmetauscherplatten der hier angesprochenen Plattenwärmetauscher Öffnungen, die im Stapel aus Wärmetauscherplatten vertikale Strömungskanäle für den Eintritt bzw. Austritt der entsprechenden Medien bilden, die durch den Anschlussstutzen ein - bzw. ausströmen. Der Anschlussbereich des Anschlussstutzens erstreckt sich flanschartig um die Wand des Anschlussstutzens herum und steht etwa rechtwinklig davon ab. Die Wanddicke des Anschlussbereichs des Anschlussstutzens kann kleiner sein als die Wanddicke im übrigen Bereich des Anschlussstutzens.The degree of reduction of the plate thickness corresponds approximately to the extent of the wall thickness of the connection piece in the connection area, so that the connection area of the connection piece lies approximately at the level of the surface of the connection plate or has only a slight offset in the level. This design has the advantage that the heat exchanger plate applied there can be well attached with its opening. As is known, the heat exchanger plates of the plate heat exchangers discussed here have openings which form vertical flow channels in the stack of heat exchanger plates for the entry or exit of the corresponding media, which flow in and out through the connecting piece. The connection region of the connecting piece extends in a flange around the wall of the connection piece and projects approximately at right angles from it. The wall thickness of the connection area of the connection piece can be smaller than the wall thickness in the remaining area of the connection piece.

Die Reduktion der Plattendicke am Rand der Öffnung soll vorzugsweise an der Seite der Anschlussplatte vorgesehen sein, die zum Plattenwärmetauscher hinweist. Es werden dadurch zusätzlich Befestigungsmaßnahmen vermieden, da im Zuge der Vormontage der Anschlussbereich des Anschlussstutzens an der angrenzenden Wärmetauscherplatte zu liegen kommt. Im Übrigen, also abgesehen von der Reduktion der Plattendicke, die zu einer Abstufung in der Anschlussplatte führt, bleibt die Anschlussplatte eine etwa ebene Platte, die jedoch je nach Bedarf einen aufgerichteten Rand besitzen kann.The reduction of the plate thickness at the edge of the opening should preferably be provided on the side of the connection plate, which points to the plate heat exchanger. In addition, fastening measures are avoided because the connection area of the connecting piece comes to lie against the adjacent heat exchanger plate in the course of the pre-assembly. Incidentally, so apart from the reduction of the plate thickness, which leads to a gradation in the connection plate remains the connection plate is an approximately flat plate, which, however, may have a raised edge as needed.

Falls in einem anderen vorne erwähnten Fall die Reduktion der Plattendicke an der vom Plattenwärmetauscher wegweisenden Seite vorgesehen sein soll, machen sich unter Umständen Befestigungsmaßnahmen in Form von punktförmigen Einprägungen zwischen dem Anschlussbereich des Anschlussstutzens und dem Rand der Öffnung erforderlich, um eine Vorfixierung des Anschlussstutzens zu erreichen und den Lötprozess durchführen zu können.If, in another case mentioned above, the reduction of the plate thickness is to be provided on the side facing away from the plate heat exchanger, fastening measures in the form of punctiform impressions between the connection area of the connecting piece and the edge of the opening may be necessary in order to pre-fix the connecting piece and to carry out the soldering process.

Die Anschlussplatte weist wenigstens zwei Einprägungen auf, die in Richtung der Wärmetauscherplatte vorstehen. Die an der Anschlussplatte anliegende Wärmetauscherplatte besitzt wenigstens zwei Löcher, die die Einprägungen aufnehmen, um eine Positionssicherung der Wärmetauscherplatten mit der Anschlussplatte zu erreichen.The connection plate has at least two indentations which project in the direction of the heat exchanger plate. The voltage applied to the connection plate heat exchanger plate has at least two holes which receive the indentations in order to achieve a position assurance of the heat exchanger plates with the connection plate.

Die an der Anschlussplatte anliegende Wärmetauscherplatte ist dicker als die übrigen Wärmetauscherplatten, um die Festigkeit des Wärmetauschers gegenüber Vibrationen zu verbessern.The voltage applied to the connection plate heat exchanger plate is thicker than the other heat exchanger plates to improve the strength of the heat exchanger against vibration.

Die Anschlussplatte kann aus mehreren, beispielsweise aus zwei identischen zusammengelöteten Platten (Doppelplatte) ausgebildet sein, was sich aus fertigungstechnischen Gründen als vorteilhaft erwiesen hat. In diesem Fall wird die reduzierte Wanddicke im Öffnungsrand durch unterschiedliche Öffnungsdurchmesser in den Platten geschaffen. Ansonsten kann die reduzierte Wanddicke beispielsweise durch flächiges Prägen oder Drücken geschaffen werden.The connection plate may be formed of several, for example, two identical brazed plates (double plate), which has proven to be advantageous for manufacturing reasons. In this case, the reduced wall thickness in the opening edge is created by different opening diameters in the plates. Otherwise, the reduced wall thickness can be created for example by blanking or pressing.

Die Anschlussplatte weist Befestigungsöffnungen zur Befestigung des Plattenwärmetauschers auf.The connection plate has fastening openings for fastening the plate heat exchanger.

Die Wärmetauscherplatten weisen Wannenform auf und sind ineinander gestapelt.The heat exchanger plates have trough shape and are stacked one inside the other.

Der Anschlussstutzen weist in seinem vom Anschlussbereich wegstrebenden Abschnitt keinen die Einsatztiefe des Anschlussstutzens begrenzenden Anschlagbereich in seiner Wand auf, der ansonsten in vielen Lösungen aus dem Stand der Technik erforderlich ist.The connecting piece has in its wegstrebenden from the connection portion no on the use depth of the connecting piece limiting stop area in its wall, which is otherwise required in many solutions from the prior art.

Die Erfindung wird nachfolgend in Ausführungsbeispielen unter Bezugnahme auf die beiliegenden Zeichnungen beschrieben.
Die Fig. 1 zeigt eine Draufsicht auf einen Wärmetauscher. Die Fig. 2 und 3 zeigen Schnitte durch den Wärmetauscher gemäß den dort angegebenen Bezeichnungen. Die Fig. 4a zeigt einen Ausschnitt aus der Fig. 4, um eine unten beschriebene Weiterbildung zu demonstrieren. Die Fig. 5 zeigt einen Ausschnitt aus einem Wärmetauscher in Form einer Skizze bei einem alternativen Design.
Bei den gezeigten Ausführungsbeispielen für gelötete Plattenwärmetauscher handelt es sich um einen Ölkühler für Kraftfahrzeuge. Gelötete Plattenwärmetauscher bestehen folglich aus lötbaren Metallen, wobei zweckmäßig mit Lotmaterial beschichtete Aluminiumbleche die bevorzugte Wahl darstellen.
Extrem dünnwandige, wannenförmige Wärmetauscherplatten 1 werden ineinander gestapelt, sodass ihre Böden einen bestimmten Abstand zueinander aufweisen. In dem Abstand ist jeweils ein Strömungskanal 70, 80 für Öl bzw. für ein flüssiges Wärmetauschmittel ausgebildet. Solche Strömungskanäle 70, 80 wechseln sich bekanntlich ab, wie auch in der Fig. 5 angedeutet worden ist. Sie sind in nicht gezeigter Weise entweder mit Wärmetauschrippen oder auch mit Verformungen der Böden ausgestattet, um den Wärmeaustausch zu verbessern. Am oberen und/oder unteren Ende des Stapels aus Wärmetauscherplatten 1 wird bekanntlich eine Anschlussplatte 5 angeordnet, die dicker ist als die Wärmetauscherplatten 1, um verschiedene Befestigungsfunktionen übernehmen zu können. Die Anschlussplatte 5 und die Wärmetauscherplatten 1, 11 besitzen kreisförmige Öffnungen, die allgemein mit dem Bezugszeichen 3 markiert wurden. Beim Stapeln der Wärmetauscherplatten 1, 11 und der Anschlussplatte 5 bilden diese Öffnungen 3 dann jeweils einen Zu - oder Abführkanal, der allgemein mit 30 bezeichnet wurde und wovon insgesamt vier Stück vorhanden sind. Die Zu - oder Abführkanäle 30 stehen in hydraulischer Verbindung mit den Strömungskanälen 70 bzw. 80, wie ebenfalls aus der Fig. 5 zu sehen ist, und wie es im Übrigen seit langem zum Stand der Technik gehört. In der Fig. 5 wurden die Strömungskanäle 80 gegenüber dem Zu - oder Abführkanal 30 geschlossen. Die anderen Strömungskanäle 70 sind dort offen. Die Art und Weise des erwähnten Verschließens erfolgt häufig durch entsprechende Umformung der Öffnungsränder.The invention will now be described by way of example with reference to the accompanying drawings.
The Fig. 1 shows a plan view of a heat exchanger. The FIGS. 2 and 3 show sections through the heat exchanger according to the names given there. The Fig. 4a shows a part of the Fig. 4 to demonstrate a further development described below. The Fig. 5 shows a section of a heat exchanger in the form of a sketch in an alternative design.
In the embodiments shown for brazed plate heat exchanger is an oil cooler for motor vehicles. Soldered plate heat exchangers consequently consist of solderable metals, with aluminum plates suitably coated with solder material being the preferred choice.
Extremely thin-walled, trough-shaped heat exchanger plates 1 are stacked in one another, so that their bottoms have a certain distance from each other. In the distance in each case a flow channel 70, 80 is formed for oil or for a liquid heat exchange medium. Such flow channels 70, 80 are known to alternate, as well as in the Fig. 5 has been indicated. They are equipped in a manner not shown either with heat exchange ribs or with deformations of the soil to improve the heat exchange. At the upper and / or lower end of the stack of heat exchanger plates 1 , a connection plate 5 is known to be arranged, which is thicker than the heat exchanger plates 1 in order to take over different attachment functions. The terminal plate 5 and the heat exchanger plates 1, 11 have circular openings, which were generally marked with the reference numeral 3 . When stacking the heat exchanger plates 1, 11 and the connection plate 5 , these openings 3 then each form a supply or discharge channel, which has been generally designated 30 and of which a total of four are present. The supply or discharge channels 30 are in hydraulic communication with the flow channels 70 and 80, as well as from Fig. 5 can be seen, and as it has long been part of the state of the art. In the Fig. 5 the flow channels 80 were closed with respect to the supply or discharge channel 30 . The other flow channels 70 are open there. The manner of the mentioned closure often takes place by appropriate deformation of the opening edges.

Aus Stabilitätsgründen wurde die unmittelbar an der Anschlussplatte 5 anliegende Wärmetauscherplatte etwas dicker ausgebildet als die übrigen Wärmetauscherplatten 1, weshalb dafür das Bezugszeichen 11 verwendet wurde.
In der Fig. 1 wurden mit dem Bezugszeichen 53 Durchbrüche in der Anschlussplatte 5 markiert, mittels derer die bereits erwähnte Befestigung des gesamten Plattenwärmetauschers erfolgen soll. Eine andere Befestigungsfunktion der Anschlussplatte 5 ist diejenige für die Anschlussstutzen 2. Die Art und Weise dieser Befestigung soll nachfolgend näher beschrieben werden.
In den Fig. 1 - 4 wird gezeigt, dass die Befestigung der Anschlussstutzen 2 an der unteren oder oberen Anschlussplatte 5 derart ausgebildet ist, dass die Reduktion der Plattendicke p am Rand 33 der Öffnung 3 an der Seite 55 der Anschlussplatte 5 vorgesehen ist, die zum Plattenwärmetauscher hinzeigt. In diesem Fall wird der Anschlussstutzen 2 durch die Öffnung 3 in der Anschlussplatte 5 hindurch gesteckt, damit er mit seinem Anschlussbereich 22 im Bereich der reduzierten Plattendicke p am Öffnungsrand 33 zu liegen kommt bzw. dort anschlägt.
Im Unterschied dazu wurde in der Fig. 5 die erwähnte Reduktion an der anderen Seite 56 der Anschlussplatte 5 vorgenommen, die vom Plattenwärmetauscher wegzeigt. Die Reduktion der Plattendicke p wird in diesen Fällen durch ein Umformverfahren, beispielsweise durch flächiges Prägen, vorgenommen. Beiden Varianten ist der Vorteil zuzuordnen, dass die Anschlussplatte 5 ansonsten eben ausgebildet ist, abgesehen davon, dass auch die Anschlussplatte 5 eine aufgerichtete Umrandung aufweisen kann, die ähnlich dem aufgerichteten Rand der Wärmetauscherplatten 1, 11 ist, die aber nicht zeichnerisch dargestellt oder im gezeigten Ausführungsbeispiel nicht vorgesehen wurde. Im Ausführungsbeispiel gemäß Fig. 5 muss der Anschlussstutzen 2 nicht durch die Öffnung 3 gesteckt werden, sondern er kann von außen mit seinem Anschlussbereich 22 im Bereich der reduzierten Plattendicke p angesetzt werden. Damit er in seiner Position vorfixiert bleibt bis der Lötprozess abgeschlossen ist, werden beispielsweise zwei Prägepunkte 20 zwischen dem Anschlussbereich 22 und dem Öffnungsrand 33 in der Anschlussplatte 2 angebracht. Die Einprägepunkte 20 sind auch als Verdrehsicherung wirksam und in der Fig. 1 erkennbar, da der Bereich eines der Anschlussstutzen 2 heraus gebrochen wurde und sichtbar ist. Eine Absicherung gegen Herausfallen des Anschlussstutzens 2 ist in der Fig. 1 hingegen nicht erforderlich, da das Herausfallen mittels des Plattenstapels zu verhindern ist.For stability reasons, the voltage applied directly to the connection plate 5 heat exchanger plate was made slightly thicker than the other heat exchanger plates 1, which is why the reference numeral 11 was used.
In the Fig. 1 were marked with the reference numeral 53 breakthroughs in the connection plate 5 , by means of which the already mentioned attachment of the entire plate heat exchanger should be made. Another attachment function of the connection plate 5 is that for the connection piece 2. The manner of this attachment will be described in more detail below.
In the Fig. 1 - 4th it is shown that the attachment of the connecting piece 2 is formed at the lower or upper connecting plate 5, that the reduction of the plate thickness p at the edge 33 of the opening 3 on the side 55 of the terminal plate 5 is provided, which is turned to the plate heat exchanger. In this case, the connecting piece 2 is inserted through the opening 3 in the connection plate 5 so that it comes to lie with its connection region 22 in the region of the reduced plate thickness p at the opening edge 33 or abuts there.
In contrast, in the Fig. 5 made the mentioned reduction on the other side 56 of the connection plate 5 , which points away from the plate heat exchanger. The reduction of the plate thickness p is made in these cases by a forming process, for example by area embossing. Both variants have the advantage that the connection plate 5 is otherwise flat, apart from the fact that the connection plate 5 may have an upright border, which is similar to the erect edge of the heat exchanger plates 1, 11 , but not shown in the drawing or shown Embodiment was not provided. In the embodiment according to Fig. 5 the connecting piece 2 must not be inserted through the opening 3 , but it can be recognized from the outside with its connection region 22 in the region of the reduced plate thickness p . So that it remains prefixed in its position until the soldering process is completed, for example, two embossing points 20 are mounted between the connection region 22 and the opening edge 33 in the connection plate 2 . The impressing points 20 are also effective as anti-rotation and in the Fig. 1 recognizable because the area of one of the connecting pieces 2 has been broken out and is visible. A hedge against falling out of the connecting piece 2 is in the Fig. 1 on the other hand not required, since the falling out by means of the plate stack is to be prevented.

Insbesondere aus den Fig. 2 und 3 ist eine andere Weiterbildung erkennbar, die die vereinfachte Vormontage der Einzelteile des Plattenwärmetauschers unterstützt. An der Anschlussplatte 2 sind zwei nach innen gerichtete Einprägungen 51 ausgebildet worden, die in Löcher 12 oder in korrespondierende Einprägungen 12 in der untersten, etwas dickeren Wärmetauscherplatte 11 eingreifen. Das Verrutschen des Stapels aus Wärmetauscherplatten auf der Anschlussplatte 2 wird dadurch verhindert.
Die Fig. 4 und 4a zeigen ebenfalls eine Weiterbildung und entsprechen insofern nicht vollständig dem eingezeichneten Schnitt G-G aus der Fig. 1. Eine gestrichelte Linie in der Fig. 4 durch die Anschlussplatte 5 soll andeuten, dass die Anschlussplatte 5 aus einer oberen Platte 5.1 und einer unteren Platte 5.2 (Doppelplatte) bestehen kann, die hinsichtlich ihrer äußeren Form identisch sind und die zusammengefügt werden. Die Fig. 4a zeigt dann eine heraus gebrochene Draufsicht auf die als Doppelplatte ausgebildete Anschlussplatte 5 im Bereich der einen Öffnung 3, in die der Anschlussstutzen 2 eingesetzt wird. In diesem Fall wurde die Reduktion der Plattendicke p im Öffnungsrand 33 nicht durch Prägen oder Drücken, sondern dadurch geschaffen, dass die untere Platte 5.2 einen Öffnungsdurchmesser d aufweist, der kleiner ist als der Öffnungsdurchmesser D in der oberen Platte 5.1. In der sich dadurch ergebenden Abstufung im Öffnungsrand 33 befindet sich der Anschlussbereich 22 des Anschlussstutzens 2. Selbstverständlich sind die Begriffe "oben" und "unten" miteinander austauschbar, wesentlich sind die unterschiedlichen Öffnungsdurchmesser D, d. Ferner ist selbstverständlich, dass die Anzahl der Platten nicht auf zwei beschränkt sein muss.
In den gezeigten Ausführungen ist vorgesehen, dass das Maß der Reduktion der Plattendicke p dem Maß der Wanddicke des Anschlussstutzens 2 im Anschlussbereich 22 entspricht, sodass der Anschlussbereich 22 des Anschlussstutzens 2 mit dem Niveau der Oberfläche der Anschlussplatte 5 abschließt. Bei anderen nicht gezeigten Ausführungen ist ein geringfügiger Versatz im Niveau vorhanden, wobei die erwähnten Maße unterschiedlich sind.In particular from the FIGS. 2 and 3 is another development recognizable that supports the simplified pre-assembly of the items of the plate heat exchanger. On the connection plate 2 , two inwardly directed indentations 51 have been formed, which engage in holes 12 or in corresponding impressions 12 in the lowermost, somewhat thicker heat exchanger plate 11 . The slippage of the stack of heat exchanger plates on the connection plate 2 is thereby prevented.
The 4 and 4a also show a development and thus do not completely correspond to the drawn section GG from the Fig. 1 , A dashed line in the Fig. 4 by the connection plate 5 is intended to indicate that the connection plate 5 may consist of an upper plate 5.1 and a lower plate 5.2 (double plate), which are identical in terms of their outer shape and are joined together. The Fig. 4a then shows a broken out plan view of the formed as a double plate connection plate 5 in the region of an opening 3, in which the connecting piece 2 is used. In this case, the reduction of the plate thickness p in the opening edge 33 was not provided by embossing or pressing, but by the lower plate 5.2 having an opening diameter d smaller than the opening diameter D in the upper plate 5.1. In the resulting gradation in the opening edge 33 is the connection portion 22 of the connecting piece 2. Of course, the terms "top" and "bottom" are interchangeable, the different opening diameter D, d. It is further understood that the number of plates need not be limited to two.
In the embodiments shown, it is provided that the degree of reduction of the plate thickness p corresponds to the dimension of the wall thickness of the connection piece 2 in the connection region 22 , so that the connection region 22 of the connection piece 2 terminates with the level of the surface of the connection plate 5 . In other embodiments, not shown, a slight offset in the level is present, the dimensions mentioned are different.

Die gezeigten Ausführungen machen ferner deutlich, dass sich der Anschlussbereich 22 des Anschlussstutzens 2 etwa rechtwinklig von der Wand des Anschlussstutzens 2 erstreckt, ohne dass eine darauf gerichtete Beschränkung beabsichtigt sein soll. Die Wanddicke im Anschlussbereich 22 des Anschlussstutzens 2 kann gegenüber der Wanddicke des Anschlussstutzens 2 in anderen Bereichen ebenfalls reduziert werden. Solche Anschlussstutzen 2 können mittels bekannter Methoden der Umformtechnik hergestellt werden.The embodiments shown further make clear that the connection region 22 of the connecting piece 2 extends approximately at right angles from the wall of the connecting piece 2, without a limitation thereon directed to be intended. The wall thickness in the connection region 22 of the connecting piece 2 can be compared the wall thickness of the connecting piece 2 in other areas are also reduced. Such connecting pieces 2 can be produced by means of known methods of forming technology.

Claims (9)

  1. Brazed plate heat exchanger composed of heat exchanger plates (1), and with a connection piece (2) which is arranged in an orifice (3) of a connection plate (5) of the plate heat exchanger, the said connection plate having a specific plate thickness (p), the margin (33) of the orifice (3) and a connection region (22) of the connection piece (2) being shaped by forming, the margin (33) of the orifice (3) possessing a reduction in the plate thickness (p) and the connection region (22) of the connection piece (2) being arranged in the region of the reduced plate thickness (p), the reduction in the plate thickness (p) being formed either on the one side (55) of the connection plate (5) which points towards the plate heat exchanger or on the other side (56) of the connection plate (5) which points away from the plate heat exchanger, either the amount of the reduction in the plate thickness (p) corresponding approximately to the amount of thickness of the connection region of the connection piece or a slight offset in level being present, so that the said amounts are different, characterized in that the connection piece (2) has an anti-twist device (20) consisting of matching shaped portions on the orifice margin (33) of the connection plate (5) and on the connection piece (2).
  2. Brazed plate heat exchanger according to Claim 1, characterized in that the connection region (22) of the connection piece (2) extends in a flange-like manner and preferably so as to project approximately at right angles from the wall (21) of the connection piece (2).
  3. Brazed plate heat exchanger according to one of the preceding claims, characterized in that the connection plate (5) otherwise is either at least predominantly approximately planar or has merely a raised border.
  4. Brazed plate heat exchanger according to one of the preceding claims, characterized in that the heat exchanger plate (11) bearing against the connection plate (5) is thicker than the other heat exchanger plates (1).
  5. Brazed plate heat exchanger according to one of the preceding claims, characterized in that the connection plate (5) has at least two embossings (51) which project in the direction of the heat exchanger plates (11, 1), and in that the heat exchanger plate bearing against the connection plate (5) possesses at least two holes (12) or shaped-out portions which receive the embossings (51) in order to ensure that the heat exchanger plates (11, 1) are securely in position on the connection plate (5).
  6. Brazed plate heat exchanger according to one of the preceding claims, characterized in that the connection plate (5) is formed from a plurality of plates, for example is designed as a double plate, the orifice diameters (D, d) in the plates being different, with the result that the orifice margin (33) acquires the reduced plate thickness (p).
  7. Brazed plate heat exchanger according to one of the preceding claims, characterized in that the connection plate (5) has fastening orifices (53) for fastening the plate heat exchanger.
  8. Brazed plate heat exchanger according to one of the preceding claims, characterized in that the heat exchanger plates (11, 1) are of trough-shaped design and are stacked one inside the other.
  9. Brazed plate heat exchanger according to one of the preceding claims, characterized in that the connection region (22) of the connection piece (2) forms a stop at the margin (33) of the orifice (3), so that deformations forming further stops in the wall (21) of the connection piece (2) are unnecessary.
EP06021302.2A 2005-11-12 2006-10-11 Brazed plate heat exchanger Expired - Fee Related EP1785687B2 (en)

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DE200510054045 DE102005054045A1 (en) 2005-11-12 2005-11-12 Brazed plate heat exchanger

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EP1785687A1 EP1785687A1 (en) 2007-05-16
EP1785687B1 true EP1785687B1 (en) 2013-04-10
EP1785687B2 EP1785687B2 (en) 2016-07-06

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10304733A1 (en) * 2003-02-06 2004-08-19 Modine Manufacturing Co., Racine Plate heat exchanger used e.g. as an oil cooler for cooling engine oil in a motor vehicle comprises a connecting sleeve with an inlet and an outlet cross-section having planes arranged at an acute angle to each other
DE102014203102A1 (en) * 2014-02-20 2015-08-20 MAHLE Behr GmbH & Co. KG Plate heat exchanger for an electric motor vehicle

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0203213B1 (en) * 1985-05-29 1988-08-10 SIGRI GmbH Procedure for manufacturing a plate heat exchanger
US4872578A (en) * 1988-06-20 1989-10-10 Itt Standard Of Itt Corporation Plate type heat exchanger
CA2123701C (en) * 1991-11-15 1999-06-08 Allan K. So In tank oil cooler
JPH07318289A (en) * 1994-05-23 1995-12-08 Nippondenso Co Ltd Heat exchanger
DE19539255A1 (en) * 1995-10-21 1997-04-24 Laengerer & Reich Gmbh & Co Cooler with filter connection, especially to cool and filter vehicle oils
DE19805439B4 (en) * 1998-02-11 2005-06-23 Behr Gmbh & Co. Kg Process for producing a stacked disk heat exchanger and heat exchanger produced thereby
US20030070793A1 (en) * 2001-10-15 2003-04-17 Dierbeck Robert F. Heat exchanger assembly with dissimilar metal connection capability
US7036562B2 (en) * 2002-02-26 2006-05-02 Honeywell International, Inc. Heat exchanger with core and support structure coupling for reduced thermal stress
DE20210209U1 (en) * 2002-06-28 2003-11-06 Autokuehler Gmbh & Co Kg Stacked plate heat exchanger, has seals made from pressed rod or wire material in between plates
DE10304733A1 (en) * 2003-02-06 2004-08-19 Modine Manufacturing Co., Racine Plate heat exchanger used e.g. as an oil cooler for cooling engine oil in a motor vehicle comprises a connecting sleeve with an inlet and an outlet cross-section having planes arranged at an acute angle to each other
DE10347181B4 (en) * 2003-10-10 2005-12-22 Modine Manufacturing Co., Racine Heat exchangers, in particular oil coolers

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EP1785687A1 (en) 2007-05-16

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