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EP3088834A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP3088834A1
EP3088834A1 EP16162358.2A EP16162358A EP3088834A1 EP 3088834 A1 EP3088834 A1 EP 3088834A1 EP 16162358 A EP16162358 A EP 16162358A EP 3088834 A1 EP3088834 A1 EP 3088834A1
Authority
EP
European Patent Office
Prior art keywords
flange
heat exchanger
diffuser
housing
screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16162358.2A
Other languages
German (de)
French (fr)
Other versions
EP3088834B1 (en
Inventor
Albrecht Siegel
Simon HUND
Pramod Barhate
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP3088834A1 publication Critical patent/EP3088834A1/en
Application granted granted Critical
Publication of EP3088834B1 publication Critical patent/EP3088834B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001Recuperative heat exchangers
    • F28D21/0003Recuperative heat exchangers the heat being recuperated from exhaust gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32Liquid-cooled heat exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/04Arrangements for sealing elements into header boxes or end plates
    • F28F9/06Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • F28F9/12Arrangements for sealing elements into header boxes or end plates by dismountable joints by flange-type connections
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/08Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes pressed; stamped; deep-drawn
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00Fastening; Joining
    • F28F2275/20Fastening; Joining with threaded elements

Definitions

  • the present invention relates to a heat exchanger, in particular an exhaust gas heat exchanger, according to the preamble of claim 1.
  • the invention also relates to a method for producing a diffuser for such a heat exchanger.
  • the tube sheets, the tubes and the housing are formed from heat-resistant, austenitic steel sheets, wherein the tubes are welded into the tube sheets punched from a sheet metal and the tubesheets in the housing.
  • the tubesheets themselves are formed as deep-drawn parts, each having a circumferential, the ends of the tubes of the tubesheet outwardly projecting wall, which is welded to the housing and to each of which a diffuser connects. This should make it possible to produce the heat exchanger advantageous welding technology.
  • Another heat exchanger with a diffuser for introducing a medium into flat heat exchanger tubes.
  • the diffuser itself has a wall which extends along the ends of a stack of flat heat exchanger tubes and the inside of which is sealed to the ends by means of soldering.
  • a tight solder joint between the wall and the ends of the heat exchanger tubes and a fixation of the stack is to be created thereby, that the wall around the entire circumference Extending the periphery of the stack and having recesses or slots corresponding to grooves in the periphery of the stack.
  • diffusers on known heat exchangers have hitherto been produced either in one piece from cast steel, die-cast aluminum or plastic injection molding or in several parts from one or more deep-drawn parts with an attached flange.
  • a flange is joined with a heat exchanger block, for example, soldered.
  • the opposite flange for upstream or downstream components, ie, the heat exchanger block facing away from the flange of the diffuser is usually designed as a flange with sealing surface and threads.
  • this function can be integrated into the casting, whereas the flange must be specially attached to one or more deep-drawn parts during the design process.
  • the threads can be integrated into the casting, whereas in the production of plastic injection-molded parts, extra threaded bushes have to be injected.
  • a disadvantage of the known from the prior art heat exchangers is that their diffusers, if they are made for example of gray cast iron, due to the required material usage and mechanical processing are expensive and also heavy. In addition, these often no longer meet the current purity and corrosion requirements. Cast stainless steel diffusers are also expensive and heavy. In turn, die cast aluminum diffusers are of limited use in terms of service temperature and corrosion resistance. In exhaust gas heat exchangers, for example, only a bolted or clipped connection of these diffusers is possible. The same applies to trained as plastic injection molded part diffusers.
  • Diffusers in turn, which are made of several individual deep-drawn parts with attached flange, are expensive because each deep-drawn part a separate tool is required and the individual deep-drawn parts to the subsequent with each other as well as with the flange must be joined. Also, the tolerance requirements for the individual deep-drawn parts are very high.
  • the present invention therefore deals with the problem of providing a heat exchanger of the generic type an improved or at least one alternative embodiment, which in particular enables a more cost-effective production.
  • the present invention is based on the general idea to produce a diffuser for a heat exchanger, such as an exhaust gas heat exchanger, no longer as previously casting or as a plastic injection molded part or a plurality of deep-drawn parts joined together, but this together with its two flanges, ie a first a housing of the Heat exchanger facing flange and a second flange facing away from it, as an integral deep-drawn part form.
  • the heat exchanger according to the invention which may be formed for example as an exhaust gas heat exchanger, has at both ends in a tube bottom held or trapped tubes for guiding a gaseous medium, such as exhaust gas, and a subsequent to the tube plates and enclosing the tubes housing for guiding a coolant.
  • a diffuser is connected, which has a housing facing the first flange and a second flange facing away from it.
  • these two flanges now form an integral part of the one-piece diffuser according to the invention designed as a deep-drawn part.
  • the diffuser according to the invention can not only one compared to gray cast iron diffusers
  • Significantly cheaper and lighter diffuser are created, but the production as a one-piece deep drawn is also much easier, since no longer several deep-drawn parts, each with correspondingly high tolerance requirements and these must be joined later in a subsequent processing step with each other and with at least the second flange.
  • the diffuser according to the invention can thus be inexpensive, easy and simple to manufacture, which also has a positive effect not only on the weight of the heat exchanger, but also on its production costs.
  • an inner contour of the first flange of the diffuser is complementary to an outer contour of the housing, so that the diffuser can be pushed with its first flange on the housing.
  • a gas-tight connection between the first flange of the diffuser and the housing is usually carried out by soldering, for example in a brazing furnace.
  • At least two threads are expediently arranged in the region of the second flange, via which screwing with a forward or downstream component is possible.
  • a fixing of the at least two nuts with the second flange is usually carried out via a soldered or welded connection. Particularly in the case of soldering, it is possible to combine this with the production of further solder joints, for example the connection of the diffuser to the housing, in a soldering furnace and thereby to produce it economically.
  • the second flange has a sealing plane with a circumferential edge, wherein the screw-in openings are arranged in the region of the edge.
  • the screw-in openings can either be punched through, in the event that the associated threads are realized via two nuts arranged behind them, or be put through, if the associated threads are produced by subsequent rolling. Due to the integral design of the second flange and its sealing plane with the diffuser, both the second flange and the peripheral edge forming the sealing plane can be manufactured comparatively easily and inexpensively.
  • the present invention is further based on the general idea to provide a simplified and cost-reduced method for manufacturing a diffuser for a heat exchanger described in the previous paragraphs, in which first the diffuser is manufactured as a one-piece deep drawn part having a first and a second flange.
  • the second flange is formed as a continuous plane.
  • a passage opening is now punched, wherein a peripheral edge formed as a sealing plane remains around this passage opening.
  • the passage opening later serves as the passage in the pipes flowing gaseous medium, such as exhaust gas.
  • at least two screw-in openings are introduced into the edge, either by means of punching or punching.
  • a thread that follows can be produced by forming, for example by rolling, in one piece with the second flange.
  • a thread that follows can be produced by forming, for example by rolling, in one piece with the second flange.
  • a heat exchanger 1 which may be formed, for example, as exhaust gas heat exchanger, a heat exchanger block 2 with held at both ends in a tube plate 3, 4 tubes 5 for guiding a gaseous medium, such as exhaust gas.
  • a gaseous medium such as exhaust gas.
  • a housing 6 for guiding a cooling medium is provided. The cooling medium is introduced via an inlet 7 into the housing 6 and discharged through an outlet 8 from this.
  • a diffuser 9, 9 ' which has a first flange 10, 10' facing the housing 6 and a second flange 11, 11 'facing away from it.
  • the description of the figures will now deal exclusively with the diffuser 9, it being understood that the diffuser 9 'could be designed in the same or similar manner.
  • the diffuser 9 with the two flanges 10, 11 is formed as a one-piece deep-drawn part, as also according to the Fig. 3 to 15 is shown.
  • An inner contour of the first flange 10 is formed complementary to an outer contour of the housing 6, so that the diffuser 9 with its first flange 10 on the housing 6 slidably and there is tightly connected to this, in particular soldered.
  • threads 12 are arranged, via which a screw with a pre or downstream component, such as an exhaust pipe, is possible.
  • the threads 12 can be realized in many different ways, as will be described below:
  • the threads 12 are each formed by a nut 13, which are arranged on an inner side of the second flange 11 in alignment with an associated screw-14.
  • the nuts 13 are welded or soldered to the second flange 11.
  • the nuts 13 themselves may be formed, for example, as square nuts 15, as for example according to the Fig. 4 10 and 11, or alternatively as hexagonal nuts 16, as shown in FIGS Fig. 5 and 12 and 13 is shown. Since the threads 12 are now in the exhaust gas-exposed area, the screws for fixing the upstream or downstream components, in the present case the downstream components, must be sealed accordingly.
  • the threads 12 can also be produced by forming, in particular by passing through the screw holes 14 in the second flange 11 and then rolling integral with the second flange 11, as for example in the diffusers 9 according to the Fig. 6 to 8 and FIGS. 14 and 15 are shown. Both ways of making the Thread 13 offer on the one hand simple and on the other hand cost-effective way of manufacturing.
  • the second flange 11 has a sealing plane 17 with a peripheral edge 18, wherein the peripheral edge 18 extends around a through opening 19 through which exhaust gas flows in operation.
  • the passage opening 19 can either be punched out, as for example according to the Fig. 9 to 15 is shown, or additionally have a stiffening collar 20, as for example in the through holes 19 according to the Fig. 3 to 5 the case is.
  • the diffuser 9 according to the invention can be produced comparatively easily by first producing it as a one-piece deep-drawn part with a first and a second flange 10, 11, ie deep-drawn, the second flange 11 being formed as a plane. In this plane of the second flange 11, a through hole 19 is now punched, wherein around the through hole 19 around a sealing layer 17 formed as a circumferential edge 18 remains. Simultaneously with the punching out of the passage opening 19, the circumferential collar 20 can optionally also be formed on it.
  • screw holes 14 are introduced, now now alternatively in the region of the screw holes 14 each thread 13 by forming, in particular by rolling, is integrally formed with the second flange 11, as for example according to the FIGS. 6 to 8 and 14 and 15 is shown, or it is in each case aligned with the screw-in openings 14 on an inner side of the second flange 11, a nut 13 is arranged, in particular soldered or welded, as shown in the Fig. 9 to 13 is shown.
  • the diffuser 9 according to the invention and the heat exchanger 1 according to the invention can be made comparatively simple and cost-effective and also lightweight, in particular in comparison to diffusers known from the prior art, which are designed, for example, as a cast part or must be assembled from a plurality of individual deep-drawn parts ,

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

Abstract

Die Erfindung betrifft einen Wärmeübertrager (1), insbesondere einen Abgaswärmeübertrager, mit - an beiden Enden in einem Rohrboden (3,4) gehaltenen Rohren (5) zur Führung eines gasförmigen Mediums, - einem an die Rohrböden (3,4) anschließenden und die Rohre (5) umschließenden Gehäuse (6) zum Führen eines Kühlmediums, - zumindest einem sich ausgangsseitig oder eingangsseitig an den Rohrboden (3,4) und/oder das Gehäuse (6) anschließenden Diffusor (9), der einen dem Gehäuse (6) zugewandten ersten Flansch (10) und einen davon abgewandten zweiten Flansch (11) aufweist. Erfindungswesentlich ist dabei, dass der zumindest eine Diffusor (9) mit den beiden Flanschen (10,11) als einstückiges Tiefziehteil ausgebildet ist.The invention relates to a heat exchanger (1), in particular an exhaust gas heat exchanger, with - At both ends in a tube plate (3,4) held tubes (5) for guiding a gaseous medium, a housing (6) adjoining the tubesheets (3, 4) and enclosing the tubes (5) for guiding a cooling medium, - At least one output side or input side to the tube plate (3,4) and / or the housing (6) adjoining the diffuser (9) facing the housing (6) first flange (10) and a second flange facing away from (11 ) having. It is essential to the invention that the at least one diffuser (9) with the two flanges (10, 11) is designed as a one-piece deep-drawn part.

Description

Die vorliegende Erfindung betrifft einen Wärmeübertrager, insbesondere einen Abgaswärmeübertrager, gemäß dem Oberbegriff des Anspruchs 1. Die Erfindung betrifft außerdem ein Verfahren zur Herstellung eines Diffusors für einen solchen Wärmeübertrager.The present invention relates to a heat exchanger, in particular an exhaust gas heat exchanger, according to the preamble of claim 1. The invention also relates to a method for producing a diffuser for such a heat exchanger.

Aus der DE 199 07 163 C2 ist ein gattungsgemäßer Wärmeübertrager mit an beiden Enden in Rohrböden gefangenen Rohren zur Führung eines gasförmigen Mediums und mit einem an die Rohrböden anschließenden und die Rohre umschließenden Gehäuse zum Führen eines flüssigen Kühlmediums bekannt. Die Rohrböden, die Rohre und das Gehäuse sind dabei aus hitzebeständigen, austenitischen Stahlblechen geformt, wobei die Rohre in die aus einem Blech gestanzten Rohrböden und die Rohrböden in das Gehäuse eingeschweißt sind. Die Rohrböden selbst sind dabei als tiefgezogene Teile ausgebildet, die jeweils eine umlaufende, die Enden der Rohre des Rohrbodens nach außen überragende Wand aufweisen, die mit dem Gehäuse verschweißt ist und an die sich jeweils ein Diffusor anschließt. Hierdurch soll es ermöglicht werden, den Wärmeübertrager schweißtechnisch vorteilhaft herstellen zu können.From the DE 199 07 163 C2 is a generic heat exchanger with trapped at both ends in tube sheets tubes for guiding a gaseous medium and with a subsequent to the tube plates and enclosing the tubes housing for guiding a liquid cooling medium known. The tube sheets, the tubes and the housing are formed from heat-resistant, austenitic steel sheets, wherein the tubes are welded into the tube sheets punched from a sheet metal and the tubesheets in the housing. The tubesheets themselves are formed as deep-drawn parts, each having a circumferential, the ends of the tubes of the tubesheet outwardly projecting wall, which is welded to the housing and to each of which a diffuser connects. This should make it possible to produce the heat exchanger advantageous welding technology.

Aus der DE 102 29 083 A1 ist ein weiterer Wärmeübertrager mit einem Diffusor bekannt, um ein Medium in flache Wärmetauscherrohre hineinzuführen. Der Diffusor selbst weist dabei eine Wand auf, die sich entlang der Enden eines Stapels von flachen Wärmetauscherrohren erstreckt und deren Innenseite mit den Enden mittels Löten dicht verbunden ist. Eine dichte Lötverbindung zwischen der Wand und den Enden der Wärmetauscherrohre sowie eine Fixierung des Stapels soll dabei dadurch geschaffen werden, dass sich die Wand umlaufend um den gesamten Umfang des Stapels erstreckt und Vertiefungen bzw. Schlitze aufweist, die mit Furchen im Umfang des Stapels korrespondieren.
Generell sind Diffusoren an bekannten Wärmeübertragern bislang entweder einteilig aus Stahlguss, Aluminiumdruckguss oder Kunststoffspritzguss oder mehrteilig aus einem oder mehreren Tiefziehteilen mit angefügtem Flansch hergestellt. Bei einer Herstellung aus Stahlguss oder dem Design aus einem oder mehreren Tiefziehteilen wird ein Flansch mit einem Wärmeübertragerblock gefügt, beispielsweise verlötet. Der gegenüberliegende Flansch für vor- oder nachgeschaltete Bauteile, d.h. der dem Wärmeübertragerblock abgewandte Flansch des Diffusors, wird meist als Flansch mit Dichtfläche und Gewinden ausgeführt. Bei Stahlguss kann diese Funktion in den Guss integriert werden, wogegen der Flansch beim Design aus einem oder mehreren Tiefziehteilen extra angefügt werden muss. Auch bei der Herstellung als Aluminiumdruckgussteil können die Gewinde in den Guss integriert werden, wogegen bei einer Herstellung als Kunststoffspritzgussteil extra Gewindebuchsen eingespritzt werden müssen.
From the DE 102 29 083 A1 For example, another heat exchanger with a diffuser is known for introducing a medium into flat heat exchanger tubes. The diffuser itself has a wall which extends along the ends of a stack of flat heat exchanger tubes and the inside of which is sealed to the ends by means of soldering. A tight solder joint between the wall and the ends of the heat exchanger tubes and a fixation of the stack is to be created thereby, that the wall around the entire circumference Extending the periphery of the stack and having recesses or slots corresponding to grooves in the periphery of the stack.
In general, diffusers on known heat exchangers have hitherto been produced either in one piece from cast steel, die-cast aluminum or plastic injection molding or in several parts from one or more deep-drawn parts with an attached flange. In a production of cast steel or the design of one or more deep-drawn parts, a flange is joined with a heat exchanger block, for example, soldered. The opposite flange for upstream or downstream components, ie, the heat exchanger block facing away from the flange of the diffuser, is usually designed as a flange with sealing surface and threads. For cast steel, this function can be integrated into the casting, whereas the flange must be specially attached to one or more deep-drawn parts during the design process. Even when produced as an aluminum die-cast part, the threads can be integrated into the casting, whereas in the production of plastic injection-molded parts, extra threaded bushes have to be injected.

Nachteilig bei den aus dem Stand der Technik bekannten Wärmeübertragern ist dabei, dass deren Diffusoren, sofern sie beispielsweise aus Grauguss hergestellt sind, aufgrund des erforderlichen Materialeinsatzes und der mechanischen Bearbeitung teuer und zudem schwer sind. Darüber hinaus genügen diese oftmals nicht mehr den aktuellen Reinheits- und Korrosionsanforderungen. Diffusoren aus Edelstahlfeinguss sind ebenfalls teuer und schwer. Diffusoren aus Aluminiumdruckguss wiederum sind bezüglich der Einsatztemperatur und der Korrosionsbeständigkeit nur beschränkt einsatzfähig. Bei Abgaswärmeübertragern ist beispielsweise nur eine geschraubte oder geclipste Anbindung dieser Diffusoren möglich. Gleiches gilt für als Kunststoffspritzgussteil ausgebildete Diffusoren. Diffusoren wiederum, welche aus mehreren einzelnen Tiefziehteilen mit angefügtem Flansch hergestellt werden, sind teuer, da je Tiefziehteil ein separates Werkzeug erforderlich ist und die einzelnen Tiefziehteile zu dem nachträglich miteinander sowie mit dem Flansch gefügt werden müssen. Auch sind die Toleranzanforderungen an die einzelnen Tiefziehteile hierbei sehr hoch.A disadvantage of the known from the prior art heat exchangers is that their diffusers, if they are made for example of gray cast iron, due to the required material usage and mechanical processing are expensive and also heavy. In addition, these often no longer meet the current purity and corrosion requirements. Cast stainless steel diffusers are also expensive and heavy. In turn, die cast aluminum diffusers are of limited use in terms of service temperature and corrosion resistance. In exhaust gas heat exchangers, for example, only a bolted or clipped connection of these diffusers is possible. The same applies to trained as plastic injection molded part diffusers. Diffusers in turn, which are made of several individual deep-drawn parts with attached flange, are expensive because each deep-drawn part a separate tool is required and the individual deep-drawn parts to the subsequent with each other as well as with the flange must be joined. Also, the tolerance requirements for the individual deep-drawn parts are very high.

Die vorliegende Erfindung beschäftigt sich daher mit dem Problem, für einen Wärmeübertrager der gattungsgemäßen Art eine verbesserte oder zumindest eine alternative Ausführungsform anzugeben, die insbesondere eine kostengünstigere Herstellung ermöglicht.The present invention therefore deals with the problem of providing a heat exchanger of the generic type an improved or at least one alternative embodiment, which in particular enables a more cost-effective production.

Dieses Problem wird erfindungsgemäß durch die Gegenstände der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.

Die vorliegende Erfindung beruht auf dem allgemeinen Gedanken, einen Diffusor für einen Wärmeübertrager, beispielsweise einen Abgaswärmeübertrager, nicht mehr wie bislang als Gussteil oder als Kunststoffspritzgussteil oder aus mehreren miteinander gefügten Tiefziehteilen herzustellen, sondern diesen zusammen mit seinen beiden Flanschen, d.h. einem ersten einem Gehäuse des Wärmeübertragers zugewandten Flansch und einem zweiten davon abgewandten Flansch, als einstückiges Tiefziehteil auszubilden. Der erfindungsgemäße Wärmeübertrager, welcher beispielsweise als Abgaswärmeübertrager ausgebildet sein kann, besitzt dabei an beiden Enden in einem Rohrboden gehaltene bzw. gefangene Rohre zur Führung eines gasförmigen Mediums, beispielsweise Abgas, sowie einen an die Rohrböden anschließenden und die Rohre umschließenden Gehäuse zum Führen eines Kühlmittels. Zumindest eingangsseitig oder ausgangsseitig an das Gehäuse ist ein Diffusor angeschlossen, der einen dem Gehäuse zugewandten ersten Flansch und einen davon abgewandten zweiten Flansch aufweist. Erfindungsgemäß bilden nun diese beiden Flansche einen integralen Bestandteil des einstückigen und als Tiefziehteil ausgebildeten erfindungsgemäßen Diffusors. Mit dem erfindungsgemäßen Diffusor kann nicht nur ein im Vergleich zu Graugussdiffusoren deutlich kostengünstigerer und leichterer Diffusor geschaffen werden, sondern die Herstellung als einstückiges Tiefziehteil ist zudem deutlich einfacher, da nicht mehr mehrere Tiefziehteile mit jeweils entsprechend hohen Toleranzanforderungen hergestellt und diese später in einem sich anschließenden Bearbeitungsschritt noch miteinander und mit zumindest dem zweiten Flansch gefügt werden müssen. Der erfindungsgemäße Diffusor lässt sich somit kostengünstig, leicht und einfach herstellen, was sich auch positiv nicht nur auf das Gewicht des Wärmeübertragers, sondern auch auf dessen Herstellungskosten auswirkt.The present invention is based on the general idea to produce a diffuser for a heat exchanger, such as an exhaust gas heat exchanger, no longer as previously casting or as a plastic injection molded part or a plurality of deep-drawn parts joined together, but this together with its two flanges, ie a first a housing of the Heat exchanger facing flange and a second flange facing away from it, as an integral deep-drawn part form. The heat exchanger according to the invention, which may be formed for example as an exhaust gas heat exchanger, has at both ends in a tube bottom held or trapped tubes for guiding a gaseous medium, such as exhaust gas, and a subsequent to the tube plates and enclosing the tubes housing for guiding a coolant. At least on the input side or output side of the housing, a diffuser is connected, which has a housing facing the first flange and a second flange facing away from it. According to the invention, these two flanges now form an integral part of the one-piece diffuser according to the invention designed as a deep-drawn part. With the diffuser according to the invention can not only one compared to gray cast iron diffusers Significantly cheaper and lighter diffuser are created, but the production as a one-piece deep drawn is also much easier, since no longer several deep-drawn parts, each with correspondingly high tolerance requirements and these must be joined later in a subsequent processing step with each other and with at least the second flange. The diffuser according to the invention can thus be inexpensive, easy and simple to manufacture, which also has a positive effect not only on the weight of the heat exchanger, but also on its production costs.

Bei einer vorteilhaften Weiterbildung der erfindungsgemäßen Lösung ist eine Innenkontur des ersten Flansches des Diffusors komplementär zu einer Außenkontur des Gehäuses ausgebildet, so dass der Diffusor mit seinem ersten Flansch über das Gehäuse geschoben werden kann. Eine gasdichte Verbindung zwischen dem ersten Flansch des Diffusors und dem Gehäuse erfolgt dabei üblicherweise über ein Verlöten, beispielsweise in einem Lötofen.In an advantageous development of the solution according to the invention an inner contour of the first flange of the diffuser is complementary to an outer contour of the housing, so that the diffuser can be pushed with its first flange on the housing. A gas-tight connection between the first flange of the diffuser and the housing is usually carried out by soldering, for example in a brazing furnace.

Zweckmäßig sind im Bereich des zweiten Flansches zumindest zwei Gewinde angeordnet, über welche ein Verschrauben mit einem vor- oder nachgeschalteten Bauteil möglich ist. Zur Realisierung dieser zumindest zwei Gewinde ist es alternativ möglich, diese durch Umformen, insbesondere durch Durchstellen von zwei Einschrauböffnungen in den zweiten Flansch und anschließendem Rollieren, einstückig mit dem Flansch herzustellen, oder aber die zumindest zwei Gewinde durch jeweils eine Mutter zu bilden, die an einer Innenseite des zweiten Flansches fluchtend zu einer zugehörigen Einschrauböffnung angeordnet werden. Sowohl das Durchstellen und das anschließende Rollieren zur Herstellung der zumindest zwei Gewinde als auch das Durchstellen der zumindest zwei Einschrauböffnungen und das anschließende Anordnen der zumindest zwei zugehörigen Muttern stellt dabei eine vergleichsweise einfache kostengünstige Möglichkeit zur Realisierung eines solchen Gewindes dar. Da die Gewinde selbst nun im Gasbereich liegen, müssen zur Abdichtung entweder beschichtete Schrauben verwendet werden oder aber der Gewindebereich selbst muss anderweitig abgedichtet werden. Ein Fixieren der zumindest zwei Muttern mit dem zweiten Flansch erfolgt dabei üblicherweise über eine Löt- oder Schweißverbindung. Besonders bei einem Verlöten bietet sich dabei die Möglichkeit, dies mit dem Herstellen weiterer Lötverbindungen, beispielsweise dem Verbinden des Diffusors mit dem Gehäuse, in einem Lötofen zusammenzufassen und dadurch wirtschaftlich herzustellen.At least two threads are expediently arranged in the region of the second flange, via which screwing with a forward or downstream component is possible. To realize these at least two threads, it is alternatively possible to produce them by forming, in particular by passing through two screw-in openings in the second flange and subsequent rolling, integral with the flange, or to form the at least two threads by a respective mother, the an inner side of the second flange are arranged in alignment with an associated screw-in opening. Both the passage and the subsequent rolling for producing the at least two threads as well as the passage through the at least two screw-in and the subsequent arranging the at least two associated nuts thereby represents a comparatively simple cost-effective way to realize such a thread. Since the thread itself now in Gas area must be used for sealing either coated screws or the threaded area itself must be otherwise sealed. A fixing of the at least two nuts with the second flange is usually carried out via a soldered or welded connection. Particularly in the case of soldering, it is possible to combine this with the production of further solder joints, for example the connection of the diffuser to the housing, in a soldering furnace and thereby to produce it economically.

In einer weiteren vorteilhaften Ausführungsform der erfindungsgemäßen Lösung weist der zweite Flansch eine Dichtebene mit einem umlaufenden Rand auf, wobei die Einschrauböffnungen im Bereich des Randes angeordnet sind. Die Einschrauböffnungen können dabei entweder durchgestanzt werden, für den Fall, dass die zugehörigen Gewinde über zwei dahinter angeordnete Muttern realisiert werden, oder aber durchgestellt werden, sofern die zugehörigen Gewinde durch anschließendes Rollieren hergestellt werden. Durch die integrale Ausbildung des zweiten Flansches und seiner Dichtebene mit dem Diffusor können sowohl der zweite Flansch als auch der die Dichtebene bildende umlaufende Rand vergleichsweise einfach und kostengünstig hergestellt werden.In a further advantageous embodiment of the solution according to the invention, the second flange has a sealing plane with a circumferential edge, wherein the screw-in openings are arranged in the region of the edge. The screw-in openings can either be punched through, in the event that the associated threads are realized via two nuts arranged behind them, or be put through, if the associated threads are produced by subsequent rolling. Due to the integral design of the second flange and its sealing plane with the diffuser, both the second flange and the peripheral edge forming the sealing plane can be manufactured comparatively easily and inexpensively.

Die vorliegende Erfindung beruht weiter auf dem allgemeinen Gedanken, ein vereinfachtes und hinsichtlich der Kosten reduziertes Verfahren zur Herstellung eines Diffusors für einen in den vorherigen Absätzen beschriebenen Wärmeübertrager anzugeben, bei welchem zunächst der Diffusor als einstückiges Tiefziehteil mit einem ersten und einem zweiten Flansch hergestellt wird. Der zweite Flansch ist dabei als durchgehende Ebene ausgebildet. In diese Ebene des zweiten Flansches wird nun eine Durchgangsöffnung eingestanzt, wobei um diese Durchgangsöffnung herum ein als Dichtebene ausgebildeter umlaufender Rand verbleibt. Die Durchgangsöffnung dient später dem Durchlass des in den Rohren strömenden gasförmigen Mediums, beispielsweise Abgas. Anschließend werden in den Rand zumindest zwei Einschrauböffnungen eingebracht und zwar entweder mittels Durchstellen oder mittels Ausstanzen. Werden die Einschrauböffnungen mittels Durchstellen eingebracht, kann anschließend ein sich daran anschließendes Gewinde durch Umformen, beispielsweise durch Rollieren, einstückig mit dem zweiten Flansch hergestellt werden. Alternativ ist es auch denkbar, an einer Innenseite des zweiten Flansches fluchtend zu den jeweiligen Einschrauböffnungen jeweils eine Mutter anzuordnen, beispielsweise anzulöten oder anzuschweißen.The present invention is further based on the general idea to provide a simplified and cost-reduced method for manufacturing a diffuser for a heat exchanger described in the previous paragraphs, in which first the diffuser is manufactured as a one-piece deep drawn part having a first and a second flange. The second flange is formed as a continuous plane. In this plane of the second flange, a passage opening is now punched, wherein a peripheral edge formed as a sealing plane remains around this passage opening. The passage opening later serves as the passage in the pipes flowing gaseous medium, such as exhaust gas. Subsequently, at least two screw-in openings are introduced into the edge, either by means of punching or punching. If the screw-in openings are introduced by means of passage, subsequently a thread that follows can be produced by forming, for example by rolling, in one piece with the second flange. Alternatively, it is also conceivable to arrange in each case a nut on an inner side of the second flange in alignment with the respective screw-in openings, for example by soldering or welding.

Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Komponenten beziehen.Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

Es zeigen, jeweils schematisch,

Fig. 1
eine Ansicht auf einen erfindungsgemäßen Wärmeübertrager,
Fig. 2
eine Schnittdarstellung durch den gemäß der Fig. 1 dargestellten Wärmeübertrager,
Fig. 3
eine Ansicht auf einen erfindungsgemäßen Diffusor des Wärmeübertragers mit ausgesteifter Durchgangsöffnung und drei durch Muttern gebildete Gewinde,
Fig. 4
eine Darstellung eines Diffusors nach Fig. 3 von unten mit Vierkantmuttern,
Fig. 5
eine Darstellung wie in Fig. 4, jedoch mit Sechskantmuttern,
Fig. 6
eine Darstellung wie in Fig. 3, jedoch mit durchgestellten und rollierten Gewinden,
Fig. 7
eine Ansicht des Diffusors aus Fig. 6 von unten,
Fig. 8
eine Schnittdarstellung durch den gemäß der Fig. 6 gezeigten Diffusor mit durchgestellten und rollierten Gewinden,
Fig. 9
eine Ansicht auf einen Diffusor mit nicht versteifter Durchgangsöffnung und mittels Vierkantmuttern gebildeten Gewinden,
Fig. 10
eine Darstellung des in der Fig. 9 gezeigten Diffusors von unten,
Fig. 11
eine Schnittdarstellung durch den gemäß der Fig. 9 gezeigten Diffusor,
Fig. 12
eine Darstellung wie in Fig. 10, jedoch mit Sechskantmuttern,
Fig. 13
eine Darstellung wie in Fig. 11, jedoch ebenfalls mit Sechskantmuttern,
Fig. 14
eine Darstellung wie in Fig. 7, jedoch ohne ausgesteifte Durchgangsöffnung,
Fig. 15
eine Schnittdarstellung durch den Diffusor gemäß der Fig. 14.
Show, in each case schematically,
Fig. 1
a view of a heat exchanger according to the invention,
Fig. 2
a sectional view through the according to the Fig. 1 illustrated heat exchanger,
Fig. 3
a view of a diffuser according to the invention of the heat exchanger with stiffened passage opening and three threads formed by nuts,
Fig. 4
a representation of a diffuser after Fig. 3 from below with square nuts,
Fig. 5
a representation like in Fig. 4 , but with hex nuts,
Fig. 6
a representation like in Fig. 3 but with inserted and rolled threads,
Fig. 7
a view of the diffuser Fig. 6 from underneath,
Fig. 8
a sectional view through the according to the Fig. 6 shown diffuser with inserted and rolled threads,
Fig. 9
a view of a diffuser with non-stiffened through hole and formed by square nuts threads,
Fig. 10
a representation of in the Fig. 9 shown diffuser from below,
Fig. 11
a sectional view through the according to the Fig. 9 shown diffuser,
Fig. 12
a representation like in Fig. 10 , but with hex nuts,
Fig. 13
a representation like in Fig. 11 , but also with hex nuts,
Fig. 14
a representation like in Fig. 7 but without stiffened passage opening,
Fig. 15
a sectional view through the diffuser according to the Fig. 14 ,

Entsprechend den Fig. 1 und 2, weist ein erfindungsgemäßer Wärmeübertrager 1, welcher beispielsweise als Abgaswärmeübertrager ausgebildet sein kann, einen Wärmeübertragerblock 2 mit an beiden Enden in einem Rohrboden 3, 4 gehaltenen Rohren 5 zur Führung eines gasförmigen Mediums, beispielsweise Abgas, auf. Dabei sind gemäß der Fig. 2 lediglich rein exemplarisch zur besseren Verdeutlichung zwei der Rohre 5, welche beispielsweise als Flachrohre ausgebildet sein können, eingezeichnet. An die Rohrböden 3, 4 anschließend und die Rohre 5 umschließend ist ein Gehäuse 6 zum Führen eines Kühlmediums vorgesehen. Das Kühlmedium wird dabei über einen Einlass 7 in das Gehäuse 6 eingeführt und über einen Auslass 8 aus diesem abgeführt. Darüber hinaus schließt sich eingangsseitig und ausgangsseitig an das Gehäuse 6 jeweils ein Diffusor 9, 9' an, der einen mit dem Gehäuse 6 zugewandten ersten Flansch 10, 10' und einen davon abgewandten zweiten Flansch 11, 11' aufweist. Im Weiteren der Figurenbeschreibung wird nunmehr ausschließlich auf den Diffusor 9 eingegangen, wobei selbstverständlich der Diffusor 9' in gleicher oder ähnlicher Weise ausgebildet sein könnte. Erfindungsgemäß ist dabei der Diffusor 9 mit den beiden Flanschen 10, 11 als einstückiges Tiefziehteil ausgebildet, wie dies auch gemäß den Fig. 3 bis 15 dargestellt ist.According to the Fig. 1 and 2 , has a heat exchanger 1 according to the invention, which may be formed, for example, as exhaust gas heat exchanger, a heat exchanger block 2 with held at both ends in a tube plate 3, 4 tubes 5 for guiding a gaseous medium, such as exhaust gas. Here are according to the Fig. 2 merely purely by way of example for better clarification two of the tubes 5, which may be formed, for example, as flat tubes, drawn. Subsequently to the tubesheets 3, 4 and enclosing the tubes 5, a housing 6 for guiding a cooling medium is provided. The cooling medium is introduced via an inlet 7 into the housing 6 and discharged through an outlet 8 from this. In addition, on the input side and the output side of the housing 6 is followed by a diffuser 9, 9 ', which has a first flange 10, 10' facing the housing 6 and a second flange 11, 11 'facing away from it. In the following, the description of the figures will now deal exclusively with the diffuser 9, it being understood that the diffuser 9 'could be designed in the same or similar manner. According to the invention, the diffuser 9 with the two flanges 10, 11 is formed as a one-piece deep-drawn part, as also according to the Fig. 3 to 15 is shown.

Eine Innenkontur des ersten Flansches 10 ist dabei komplementär zu einer Außenkontur des Gehäuses 6 ausgebildet, so dass der Diffusor 9 mit seinem ersten Flansch 10 über das Gehäuse 6 schiebbar und dort dicht mit diesem verbindbar, insbesondere verlötbar ist.An inner contour of the first flange 10 is formed complementary to an outer contour of the housing 6, so that the diffuser 9 with its first flange 10 on the housing 6 slidably and there is tightly connected to this, in particular soldered.

Im Bereich des zweiten Flansches 11 sind zumindest zwei, im vorliegenden Fall jeweils drei Gewinde 12 angeordnet, über welche ein Verschrauben mit einem vor- oder nachgeschalteten Bauteil, beispielsweise einer Abgasleitung, möglich ist. Die Gewinde 12 können dabei auf unterschiedlichste Art und Weise realisiert werden, wie dies nachfolgend beschrieben wird:In the region of the second flange 11 at least two, in the present case three threads 12 are arranged, via which a screw with a pre or downstream component, such as an exhaust pipe, is possible. The threads 12 can be realized in many different ways, as will be described below:

Bei den gemäß den Fig. 3 bis 5 sowie 9 bis 13 gezeigten Ausführungsformen sind die Gewinde 12 jeweils von einer Mutter 13 gebildet, die an einer Innenseite des zweiten Flansches 11 fluchtend zu einer zugehörigen Einschrauböffnung 14 angeordnet sind. Die Muttern 13 sind dabei mit dem zweiten Flansch 11 verschweißt oder verlötet. Die Muttern 13 selbst können beispielsweise als Vierkantmuttern 15 ausgebildet sein, wie dies beispielsweise gemäß den Fig. 4 sowie 10 und 11 dargestellt ist, oder aber alternativ als Sechskantmuttern 16, wie dies gemäß den Fig. 5 sowie 12 und 13 dargestellt ist. Da die Gewinde 12 nunmehr im abgasbeaufschlagten Bereich liegen, müssen die Schrauben zum Fixieren der vor- oder nachgeschalteten Bauteile, im vorliegenden Fall der nachgeschalteten Bauteile, entsprechend abgedichtet sein.In accordance with the Fig. 3 to 5 and 9 to 13 shown embodiments, the threads 12 are each formed by a nut 13, which are arranged on an inner side of the second flange 11 in alignment with an associated screw-14. The nuts 13 are welded or soldered to the second flange 11. The nuts 13 themselves may be formed, for example, as square nuts 15, as for example according to the Fig. 4 10 and 11, or alternatively as hexagonal nuts 16, as shown in FIGS Fig. 5 and 12 and 13 is shown. Since the threads 12 are now in the exhaust gas-exposed area, the screws for fixing the upstream or downstream components, in the present case the downstream components, must be sealed accordingly.

Alternativ zu den Muttern 13 können die Gewinde 12 auch durch Umformen, insbesondere durch Durchstellen der Einschrauböffnungen 14 in den zweiten Flansch 11 und anschließendes Rollieren einstückig mit dem zweiten Flansch 11 hergestellt werden, wie dies beispielsweise bei den Diffusoren 9 gemäß den Fig. 6 bis 8 sowie 14 und 15 dargestellt ist. Beide Möglichkeiten der Herstellung der Gewinde 13 bieten dabei eine einerseits einfache und andererseits kostengünstige Möglichkeit der Fertigung.As an alternative to the nuts 13, the threads 12 can also be produced by forming, in particular by passing through the screw holes 14 in the second flange 11 and then rolling integral with the second flange 11, as for example in the diffusers 9 according to the Fig. 6 to 8 and FIGS. 14 and 15 are shown. Both ways of making the Thread 13 offer on the one hand simple and on the other hand cost-effective way of manufacturing.

Betrachtet man die Fig. 3 bis 15, so kann man erkennen, dass der zweite Flansch 11 eine Dichtebene 17 mit einem umlaufenden Rand 18 aufweist, wobei der umlaufende Rand 18 um eine Durchgangsöffnung 19, durch welche in Betrieb Abgas strömt, verläuft. Die Durchgangsöffnung 19 kann dabei entweder ausgestanzt sein, wie dies beispielsweise gemäß den Fig. 9 bis 15 dargestellt ist, oder aber zusätzlich einen aussteifenden Kragen 20 aufweisen, wie dies beispielsweise bei den Durchgangsöffnungen 19 gemäß den Fig. 3 bis 5 der Fall ist.Looking at the Fig. 3 to 15 Thus, it can be seen that the second flange 11 has a sealing plane 17 with a peripheral edge 18, wherein the peripheral edge 18 extends around a through opening 19 through which exhaust gas flows in operation. The passage opening 19 can either be punched out, as for example according to the Fig. 9 to 15 is shown, or additionally have a stiffening collar 20, as for example in the through holes 19 according to the Fig. 3 to 5 the case is.

Generell kann der erfindungsgemäße Diffusor 9 vergleichsweise einfach hergestellt werden, indem dieser zunächst als einstückiges Tiefziehteil mit einem ersten und einem zweiten Flansch 10, 11 hergestellt, d.h. tiefgezogen wird, wobei der zweite Flansch 11 als Ebene ausgebildet ist. In diese Ebene des zweiten Flansches 11 wird nun eine Durchgangsöffnung 19 eingestanzt, wobei um die Durchgangsöffnung 19 herum ein als Dichtebene 17 ausgebildeter, umlaufender Rand 18 verbleibt. Gleichzeitig mit dem Ausstanzen der Durchgangsöffnung 19 kann optional an dieser auch der umlaufende Kragen 20 umgeformt werden. In den Rand 18 werden nun zumindest zwei, im vorliegenden Fall drei, Einschrauböffnungen 14 eingebracht, wobei nunmehr alternativ im Bereich der Einschrauböffnungen 14 jeweils ein Gewinde 13 durch Umformen, insbesondere durch Rollieren, einstückig mit dem zweiten Flansch 11 hergestellt wird, wie dies beispielsweise gemäß den Fig. 6 bis 8 und 14 und 15 dargestellt ist, oder aber es wird jeweils fluchtend zu den Einschrauböffnungen 14 an einer Innenseite des zweiten Flansches 11 eine Mutter 13 angeordnet, insbesondere angelötet oder angeschweißt, wie dies gemäß den Fig. 9 bis 13 dargestellt ist.In general, the diffuser 9 according to the invention can be produced comparatively easily by first producing it as a one-piece deep-drawn part with a first and a second flange 10, 11, ie deep-drawn, the second flange 11 being formed as a plane. In this plane of the second flange 11, a through hole 19 is now punched, wherein around the through hole 19 around a sealing layer 17 formed as a circumferential edge 18 remains. Simultaneously with the punching out of the passage opening 19, the circumferential collar 20 can optionally also be formed on it. In the edge 18 now at least two, in the present case three, screw holes 14 are introduced, now now alternatively in the region of the screw holes 14 each thread 13 by forming, in particular by rolling, is integrally formed with the second flange 11, as for example according to the FIGS. 6 to 8 and 14 and 15 is shown, or it is in each case aligned with the screw-in openings 14 on an inner side of the second flange 11, a nut 13 is arranged, in particular soldered or welded, as shown in the Fig. 9 to 13 is shown.

Mit dem erfindungsgemäßen Diffusor 9 und dem diesen beinhaltenden erfindungsgemäßen Wärmeübertrager 1 kann letzterer vergleichsweise einfach und kostengünstig und zudem leicht ausgebildet werden, insbesondere im Vergleich zu aus dem Stand der Technik bekannten Diffusoren, welche beispielsweise als Gussteil ausgebildet sind oder aus mehreren einzelnen Tiefziehteilen zusammengefügt werden müssen.With the diffuser 9 according to the invention and the heat exchanger 1 according to the invention, the latter can be made comparatively simple and cost-effective and also lightweight, in particular in comparison to diffusers known from the prior art, which are designed, for example, as a cast part or must be assembled from a plurality of individual deep-drawn parts ,

Claims (8)

Wärmeübertrager (1), insbesondere ein Abgaswärmeübertrager, mit - an beiden Enden in einem Rohrboden (3,4) gehaltenen Rohren (5) zur Führung eines gasförmigen Mediums, - einem an die Rohrböden (3,4) anschließenden und die Rohre (5) umschließenden Gehäuse (6) zum Führen eines Kühlmediums, - zumindest einem sich ausgangsseitig oder eingangsseitig an den Rohrboden (3,4) und/oder das Gehäuse (6) anschließenden Diffusor (9), der einen dem Gehäuse (6) zugewandten ersten Flansch (10) und einen davon abgewandten zweiten Flansch (11) aufweist, dadurch gekennzeichnet,
dass der zumindest eine Diffusor (9) mit den beiden Flanschen (10,11) als einstückiges Tiefziehteil ausgebildet ist.
Heat exchanger (1), in particular an exhaust gas heat exchanger, with - At both ends in a tube plate (3,4) held tubes (5) for guiding a gaseous medium, a housing (6) adjoining the tubesheets (3, 4) and enclosing the tubes (5) for guiding a cooling medium, at least one diffuser (9) adjoining the tube bottom (3,4) and / or the housing (6) on the output side or input side, which has a first flange (10) facing the housing (6) and a second flange (11) remote from the housing (6) ) having, characterized,
in that the at least one diffuser (9) with the two flanges (10, 11) is designed as an integral deep-drawn part.
Wärmeübertrager nach Anspruch 1,
dadurch gekennzeichnet, dass
eine Innenkontur des ersten Flansches (10) komplementär zu einer Außenkontur des Gehäuses (6) ausgebildet ist, so dass der Diffusor (9) mit seinem ersten Flansch (10) über das Gehäuse (6) schiebbar ist.
Heat exchanger according to claim 1,
characterized in that
an inner contour of the first flange (10) complementary to an outer contour of the housing (6) is formed, so that the diffuser (9) with its first flange (10) via the housing (6) is slidable.
Wärmeübertrager nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
im Bereich des zweiten Flansches (11) zumindest zwei Gewinde (12) angeordnet sind, über welche ein Verschrauben mit einem vor- oder nachgeschalteten Bauteil möglich ist.
Heat exchanger according to claim 1 or 2,
characterized in that
in the region of the second flange (11) at least two threads (12) are arranged, via which a screwing with a forward or downstream component is possible.
Wärmeübertrager nach Anspruch 3,
dadurch gekennzeichnet, dass
die zumindest zwei Gewinde (12) durch Umformen, insbesondere durch Durchstellen von zwei Einschrauböffnungen (14) in den zweiten Flansch (11) und anschließendes Rollieren, einstückig mit dem zweiten Flansch (11) hergestellt sind.
Heat exchanger according to claim 3,
characterized in that
the at least two threads (12) are produced by forming, in particular by passing through two screw-in openings (14) in the second flange (11) and subsequent rolling, in one piece with the second flange (11).
Wärmeübertrager nach Anspruch 3,
dadurch gekennzeichnet, dass
die zumindest zwei Gewinde (12) von jeweils einer Mutter (13) gebildet sind, die an einer Innenseite des zweiten Flansches (11) fluchtend zu einer zugehörigen Einschrauböffnung (14) angeordnet sind.
Heat exchanger according to claim 3,
characterized in that
the at least two threads (12) are each formed by a nut (13) which are arranged on an inner side of the second flange (11) in alignment with an associated screw-in opening (14).
Wärmeübertrager nach Anspruch 5,
dadurch gekennzeichnet, dass
die zumindest zwei Muttern (13) mit dem zweiten Flansch (11) verschweißt oder verlötet sind.
Heat exchanger according to claim 5,
characterized in that
the at least two nuts (13) are welded or soldered to the second flange (11).
Wärmeübertrager nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, dass
der zweite Flansch (11) eine Dichtebene (17) mit einem umlaufenden Rand (18) aufweist, wobei die Einschrauböffnungen (14) im Bereich des Randes (18) angeordnet sind.
Heat exchanger according to one of claims 4 to 6,
characterized in that
the second flange (11) has a sealing plane (17) with a peripheral edge (18), wherein the screw-in openings (14) are arranged in the region of the edge (18).
Verfahren zur Herstellung eines Diffusors (9) für einen Wärmeübertrager (1) nach einem der Ansprüche 1 bis 7, bei dem - der Diffusor (9) als einstückiges Tiefziehteil mit einem ersten und einem zweiten Flansch (10,11) hergestellt wird, wobei der zweite Flansch (11) als Ebene ausgebildet ist, - in die Ebene des zweiten Flansches (11) eine Durchgangsöffnung (19) eingestanzt wird, wobei um diese Durchgangsöffnung (19) ein als Dichtebene (17) ausgebildeter umlaufender Rand (18) verbleibt, - in den Rand (18) zumindest zwei Einschrauböffnungen (14) eingebracht werden, - im Bereich der Einschrauböffnungen (14) jeweils ein Gewinde (12) durch Umformen, insbesondere durch Rollieren, einstückig mit dem zweiten Flansch (11) hergestellt wird, oder - fluchtend zu den Einschrauböffnungen (14) an einer Innenseite des zweiten Flansches (11) jeweils eine Mutter (13) angeordnet, insbesondere angelötet oder angeschweißt wird. Method for producing a diffuser (9) for a heat exchanger (1) according to one of Claims 1 to 7, in which the diffuser (9) is produced as a one-piece deep-drawn part with a first and a second flange (10, 11), wherein the second flange (11) is designed as a plane, - In the plane of the second flange (11) a through hole (19) is stamped, wherein a through this opening (19) as a sealing plane (17) formed peripheral edge (18) remains, - in the edge (18) at least two screw-in openings (14) are introduced, - In each case a thread (12) by forming, in particular by rolling, in one piece with the second flange (11) is produced in the region of the screw-in openings (14), or - In alignment with the screw-in openings (14) on an inner side of the second flange (11) in each case a nut (13) is arranged, in particular soldered or welded.
EP16162358.2A 2015-03-26 2016-03-24 Heat exchanger Active EP3088834B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019180377A1 (en) * 2018-03-23 2019-09-26 Valeo Systemes Thermiques Intake air cooling device for an internal combustion engine
US11306982B2 (en) 2018-05-03 2022-04-19 Mann+Hummel Gmbh Heat exchanger, air intake system with a heat exchanger, and method for mounting a heat exchanger

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907163C2 (en) 1998-04-24 2003-08-14 Behr Gmbh & Co Heat exchanger, in particular exhaust gas heat exchanger
EP1367252A2 (en) * 2002-05-30 2003-12-03 Valeo Termico S.A. Gas heat exchanger
DE10229083A1 (en) 2002-06-28 2004-01-15 Modine Manufacturing Co., Racine Heat exchanger with a diffuser
DE10359054A1 (en) * 2003-12-17 2005-07-21 Daimlerchrysler Ag Flange for exhaust manifold of motor vehicle, has metal sheet shaped part that is manufactured by reverse stamping technique, and fastening units connected to openings provided on either sides of central opening of metal sheet part
EP1801407A1 (en) * 2004-09-28 2007-06-27 T.RAD Co,.Ltd Egr cooler
DE102013218867A1 (en) * 2012-09-20 2014-03-20 Behr Gmbh & Co. Kg Heat exchanger used in combustion engine, has tubesheets that are arranged between housing and fluid conducting pipes, and partially rotating flange that is projected radially from housing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907163C2 (en) 1998-04-24 2003-08-14 Behr Gmbh & Co Heat exchanger, in particular exhaust gas heat exchanger
EP1367252A2 (en) * 2002-05-30 2003-12-03 Valeo Termico S.A. Gas heat exchanger
DE10229083A1 (en) 2002-06-28 2004-01-15 Modine Manufacturing Co., Racine Heat exchanger with a diffuser
DE10359054A1 (en) * 2003-12-17 2005-07-21 Daimlerchrysler Ag Flange for exhaust manifold of motor vehicle, has metal sheet shaped part that is manufactured by reverse stamping technique, and fastening units connected to openings provided on either sides of central opening of metal sheet part
EP1801407A1 (en) * 2004-09-28 2007-06-27 T.RAD Co,.Ltd Egr cooler
DE102013218867A1 (en) * 2012-09-20 2014-03-20 Behr Gmbh & Co. Kg Heat exchanger used in combustion engine, has tubesheets that are arranged between housing and fluid conducting pipes, and partially rotating flange that is projected radially from housing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019180377A1 (en) * 2018-03-23 2019-09-26 Valeo Systemes Thermiques Intake air cooling device for an internal combustion engine
FR3079267A1 (en) * 2018-03-23 2019-09-27 Valeo Systemes Thermiques APPARATUS FOR COOLING AN INTAKE AIR OF INTERNAL COMBUSTION ENGINE
US11306982B2 (en) 2018-05-03 2022-04-19 Mann+Hummel Gmbh Heat exchanger, air intake system with a heat exchanger, and method for mounting a heat exchanger

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