EP1690057B1 - Heat exchanger, particularly exhaust heat exchanger - Google Patents

Heat exchanger, particularly exhaust heat exchanger Download PDF

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Publication number
EP1690057B1
EP1690057B1 EP04790976A EP04790976A EP1690057B1 EP 1690057 B1 EP1690057 B1 EP 1690057B1 EP 04790976 A EP04790976 A EP 04790976A EP 04790976 A EP04790976 A EP 04790976A EP 1690057 B1 EP1690057 B1 EP 1690057B1
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EP
European Patent Office
Prior art keywords
housing
heat exchanger
duct
expansion element
channel
Prior art date
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Expired - Fee Related
Application number
EP04790976A
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German (de)
French (fr)
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EP1690057A1 (en
Inventor
Peter Kalisch
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Mercedes Benz Group AG
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DaimlerChrysler AG
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Publication of EP1690057A1 publication Critical patent/EP1690057A1/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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-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
    • F28D7/163—Heat-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 with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • F28F9/0236—Header boxes; End plates floating elements
    • 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
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0278—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of stacked distribution plates or perforated plates arranged over end plates
    • 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
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases

Definitions

  • the invention relates to a heat exchanger for cooling gas or liquid media, in particular an exhaust gas heat exchanger for an internal combustion engine, comprising a tubular housing having at least one inlet opening with a subsequent annular channel for distributed inflow of a cooling medium into the interior of the housing.
  • Such a heat exchanger is known from JP 2000045884.
  • Such a heat exchanger is also known from DE 102 38 882 A1 and comprises a tubular housing in which a tube bundle is used for the axial flow through the exhaust gas, wherein the tube bundle is surrounded by an introduced coolant.
  • a tube bundle is used for the axial flow through the exhaust gas, wherein the tube bundle is surrounded by an introduced coolant.
  • the tubes on the one hand and the housing on the other hand arise during operation of the exhaust gas heat exchanger thermoelectric voltages due to different strains of the tubes and the housing.
  • To compensate for such voltages slots are arranged in the housing, which are sealed to the outside by a channel housing with a corrugated pipe section. This creates an integrated into the heat exchanger housing expansion compensation element.
  • the annular channel located within the housing impairs the flow-through cross-section and the production of the heat exchanger.
  • the annular channel alone as uniform as possible circumferential distribution of the coolant over the housing interior and a largely uniform flow velocity of the coolant inside the housing can not be achieved.
  • the invention is based on the object to make the generic heat exchanger such that with a simplified structure distributed over the circumference of the housing uniform flow of coolant into the housing interior can be done safely.
  • the inlet opening is arranged on the channel housing and has a connecting piece for a hose line.
  • the heat exchanger housing and the channel housing are made in one piece, e.g. is made by casting. Regardless, it is also conceivable to produce the channel housing, for example, made of sheet metal separately from the heat exchanger housing and to connect with this by welding or soldering tight.
  • the heat exchanger with a channel housing made of sheet metal, it is in the context of the invention also advantageous if parts of the heat exchanger housing and the channel housing are used simultaneously to form a conventional in heat exchangers of this type expansion element.
  • a heat exchanger is created, which is compact and can be produced inexpensively, since, for example, a special channel housing for the distribution of the coolant can be omitted.
  • the channel housing is formed with a corrugated pipe section and the passage openings are designed as slots which extend at an axial distance from each other partially over the circumference of the heat exchanger housing.
  • the integrated expansion element simultaneously performs the function of uniform distribution of the coolant inside the housing.
  • the expansion element is arranged with the inlet opening at the inlet end of the housing, wherein the channel housing with a smooth cylindrical part welded to the heat exchanger housing and the subsequent corrugated pipe section on the inlet-side flange of the housing or is soldered.
  • the heat exchanger shown in the exemplary embodiment is an exhaust gas heat exchanger 1 for cooling the exhaust gases of an internal combustion engine, in particular for cooling the exhaust gases recirculated into the combustion chamber of the internal combustion engine in certain operating states (so-called exhaust gas recirculation).
  • the exhaust gas heat exchanger 1 has a tubular housing 2, each with a flange 3, 4 on the inflow 5 and the outflow 6.
  • the housing 2 is U-shaped, so that the flanges 3 and 4 are laterally adjacent.
  • the U-shaped housing parts are interconnected by a tab 7.
  • a sheet metal hanger 8 is provided for fixing the heat exchanger 1 on the engine housing.
  • a tube bundle extending in the longitudinal direction is arranged in the interior of the heat exchanger housing 2 and is welded tightly to the housing 2 via a respective tube plate at the longitudinal housing ends.
  • the housing 2 is in the region of lying on the inflow 5 flange 3 outside of a channel housing 9, which encloses a ring channel 10 relative to the housing 2.
  • the channel housing 9 is made of sheet metal and is connected to the heat exchanger housing 2 by welding or soldering.
  • the channel housing 2 may in the context of the invention also consist of the same material as the housing 2 and be made in one piece with this.
  • the channel housing 2 has an inlet opening 11 with a connecting piece 12 for a coolant hose.
  • passage openings 13 to 16 distributed over the circumference are arranged. Via the passage openings 13 to 16 can thus evenly distributed from the connecting piece 11 in the annular channel 10 coolant flow into the interior of the housing 2, so in addition to a substantially uniform heating and a largely uniform flow velocity of the coolant along the surface of the exhaust gas flowed through the pipes is ensured.
  • the exit of the coolant from the housing 2 takes place in the vicinity of the flange 4 on the outflow side 6 through a connecting piece 17.
  • the channel housing 9 with the passage openings is part of an expansion element 18 integrated in the housing 2.
  • the passage openings 13 to 16 designed as slots, which are arranged at an axial distance from each other over part of the circumference, while the slots outwardly covering and made of sheet metal channel housing 9 next to a smooth cylindrical housing portion 19 for receiving the connecting piece 12 still an additional corrugated pipe section 20th has for the expansion compensation.
  • the connecting pieces 12 and 17 are arranged close to the flanges 3 and 4. This results in that the expansion element 17 is positioned close to the flange 3, wherein the housing portion 19 is welded directly to the housing 2 and the corrugated pipe section 20 directly to the flange 3 or soldered.
  • a protective cover 21 the channel housing 9 is protected against external influences.
  • the object of the invention is shown in the combination of a heat exchanger with an expansion element.
  • the invention also includes an embodiment of a heat exchanger without expansion element, in which the channel housing 2 is designed without the additional corrugated pipe section 20 and the passage openings 13 to 16 are made as simple holes.

Description

Die Erfindung betrifft einen Wärmetauscher zum Kühlen von gas- oder flüssigen Medien, insbesondere einen Abgaswärmetauscher für eine Brennkraftmaschine, mit einem rohrförmigen Gehäuse, das zumindest eine Einlassöffnung mit einem sich anschließenden Ringkanal zum verteilten Einströmen eines Kühlmediums in das Innere des Gehäuses aufweist.The invention relates to a heat exchanger for cooling gas or liquid media, in particular an exhaust gas heat exchanger for an internal combustion engine, comprising a tubular housing having at least one inlet opening with a subsequent annular channel for distributed inflow of a cooling medium into the interior of the housing.

Ein derartiger Wärmetauscher ist aus JP 20000 45884 bekannt.Such a heat exchanger is known from JP 2000045884.

Ein derartiger Wärmetauscher ist ebenso aus der DE 102 38 882 A1 bekannt und umfasst ein rohrförmiges Gehäuse, in dem ein Rohrbündel zur axialen Durchströmung des Abgases eingesetzt ist, wobei das Rohrbündel von einem eingeleiteten Kühlmittel umspült wird. Infolge unterschiedlicher Temperaturbeaufschlagung der Rohre einerseits und des Gehäuses andererseits entstehen beim Betrieb des Abgaswärmetauschers Thermospannungen auf Grund unterschiedlicher Dehnungen der Rohre und des Gehäuses. Zum Ausgleich derartiger Spannungen sind in dem Gehäuse Schlitze angeordnet, die nach außen durch ein Kanalgehäuse mit einem Wellrohrabschnitt abgedichtet sind. Hierdurch entsteht ein in das Wärmetauscher-Gehäuse integriertes Dehnungsausgleichselement.Such a heat exchanger is also known from DE 102 38 882 A1 and comprises a tubular housing in which a tube bundle is used for the axial flow through the exhaust gas, wherein the tube bundle is surrounded by an introduced coolant. As a result of different Temperaturbeaufschlagung the tubes on the one hand and the housing on the other hand arise during operation of the exhaust gas heat exchanger thermoelectric voltages due to different strains of the tubes and the housing. To compensate for such voltages slots are arranged in the housing, which are sealed to the outside by a channel housing with a corrugated pipe section. This creates an integrated into the heat exchanger housing expansion compensation element.

Die Zuführung des Kühlmittels in das Gehäuseinnere erfolgt über eine radial in das Gehäuse eingebrachte Einlassöffnung und einen stromab folgenden Ringkanal, durch den eine gleichmäßige Verteilung des in das Gehäuseinnere einströmenden Kühlmittels erfolgen soll.The supply of the coolant into the housing interior via a radially introduced into the housing inlet opening and a downstream annular channel, through which a uniform distribution of the inflowing into the housing interior coolant is to take place.

Der innerhalb des Gehäuses liegende Ringkanal beeinträchtigt den durchströmbaren Querschnitt sowie die Herstellung des Wärmetauschers. Außerdem ist auch mit dem Ringkanal alleine eine möglichst gleichmäßige umfangsmäßige Verteilung des Kühlmittels über das Gehäuseinnere sowie eine weitgehend einheitliche Strömungsgeschwindigkeit des Kühlmittels im Inneren des Gehäuses noch nicht zu erreichen.The annular channel located within the housing impairs the flow-through cross-section and the production of the heat exchanger. In addition, with the annular channel alone as uniform as possible circumferential distribution of the coolant over the housing interior and a largely uniform flow velocity of the coolant inside the housing can not be achieved.

Ferner ist aus der DE 296 12 361 U1 ein weiterer Wärmetauscher mit einem in das aus Blech bestehende Wärmetauscher-Gehäuse integrierten Dehnungsausgleichselement bekannt.Furthermore, from DE 296 12 361 U1 a further heat exchanger with a built-in sheet metal heat exchanger housing expansion compensation element known.

Der Erfindung liegt die Aufgabe zu Grunde, den gattungsgemäßen Wärmetauscher derart weiter zu gestalten, dass bei einem vereinfachten Aufbau eine über den Umfang des Gehäuses verteilte gleichmäßige Einströmung von Kühlmittel in das Gehäuseinnere sicher erfolgen kann.The invention is based on the object to make the generic heat exchanger such that with a simplified structure distributed over the circumference of the housing uniform flow of coolant into the housing interior can be done safely.

Die Aufgabe ist erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruches 1 angegebenen Merkmale gelöst.The object is achieved by the features specified in the characterizing part of claim 1.

Durch die erfindungsgemäße Anordnung des Ringkanales außen am Gehäuse wird erreicht, dass das Gehäuseinnere durch den Ringkanal bauraummäßig nicht mehr beeinträchtigt wird.Due to the inventive arrangement of the annular channel outside of the housing ensures that the housing interior is no longer affected by the annular channel space.

Ferner ist es möglich, durch eine einfache Verteilung von Durchtrittsöffnungen im Gehäuse eine über dessen Umfang verteilte gleichmäßige Einströmung von Kühlmittel in das Gehäuseinnere zu erzielen.Further, it is possible to achieve a distributed over the circumference uniform flow of coolant into the housing interior by a simple distribution of passages in the housing.

In weiterer Ausgestaltung der Erfindung ist es vorteilhaft, wenn die Einlassöffnung am Kanalgehäuse angeordnet ist und einen Anschlussstutzen für eine Schlauchleitung aufweist.In a further embodiment of the invention, it is advantageous if the inlet opening is arranged on the channel housing and has a connecting piece for a hose line.

Eine einfache Herstellung wird erreicht, wenn das Wärmetauscher-Gehäuse und das Kanalgehäuse aus einem Stück, z.B. durch Giessen hergestellt ist. Unabhängig davon ist es aber auch denkbar, das Kanalgehäuse beispielsweise aus Blech getrennt vom Wärmetauscher-Gehäuse herzustellen und mit diesem durch Schweißen oder Löten dicht zu verbinden.Simple manufacture is achieved when the heat exchanger housing and the channel housing are made in one piece, e.g. is made by casting. Regardless, it is also conceivable to produce the channel housing, for example, made of sheet metal separately from the heat exchanger housing and to connect with this by welding or soldering tight.

Bei einer Ausgestaltung des Wärmetauschers mit einem Kanalgehäuse aus Blech ist es im Rahmen der Erfindung weiterhin von Vorteil, wenn Teile des Wärmetauscher-Gehäuses sowie das Kanalgehäuse gleichzeitig zur Bildung eines bei Wärmetauschern dieser Art üblichen Dehnungselementes verwendet werden. Hierdurch wird ein Wärmetauscher geschaffen, der kompakt baut und kostengünstig hergestellt werden kann, da beispielsweise ein besonderes Kanalgehäuse für die Verteilung des Kühlmittels entfallen kann.In one embodiment of the heat exchanger with a channel housing made of sheet metal, it is in the context of the invention also advantageous if parts of the heat exchanger housing and the channel housing are used simultaneously to form a conventional in heat exchangers of this type expansion element. As a result, a heat exchanger is created, which is compact and can be produced inexpensively, since, for example, a special channel housing for the distribution of the coolant can be omitted.

Erreicht wird dies dadurch, in dem das Kanalgehäuse mit einem Wellrohrabschnitt ausgebildet wird und die Durchtrittsöffnungen als Schlitze ausgeführt werden, die mit axialem Abstand voneinander sich teilweise über den Umfang des Wärmetauscher-Gehäuses erstrecken. Bei dem so geschaffenen Wärmetauscher übernimmt das integrierte Dehnungselement gleichzeitig die Funktion der gleichmäßigen Verteilung des Kühlmittels im Gehäuseinneren.This is achieved in that the channel housing is formed with a corrugated pipe section and the passage openings are designed as slots which extend at an axial distance from each other partially over the circumference of the heat exchanger housing. In the heat exchanger thus created, the integrated expansion element simultaneously performs the function of uniform distribution of the coolant inside the housing.

Um dabei möglichst die gesamte Länge des Wärmetauscher-Gehäuses zur Kühlung nutzen zu können, ist das Dehnungselement mit der Einlassöffnung am eintrittsseitigen Ende des Gehäuses angeordnet, wobei das Kanalgehäuse mit einem glatten zylindrischen Teil am Wärmetauschergehäuse und der sich anschließende Wellrohrabschnitt am eintrittsseitigen Flansch des Gehäuses angeschweißt oder angelötet ist.In order to use as possible the entire length of the heat exchanger housing for cooling, the expansion element is arranged with the inlet opening at the inlet end of the housing, wherein the channel housing with a smooth cylindrical part welded to the heat exchanger housing and the subsequent corrugated pipe section on the inlet-side flange of the housing or is soldered.

Die Erfindung ist nachfolgend anhand eines in der Zeichnung gezeigten Ausführungsbeispieles näher erläutert.The invention is explained in more detail with reference to an embodiment shown in the drawing.

In der einzigen Zeichnung sind in einer perspektiven Darstellung nur die wesentlichen Teile eines Wärmetauschers zur Kühlung von gasförmigen Medien dargestellt.In the single drawing, only the essential parts of a heat exchanger for cooling gaseous media are shown in a perspective view.

Bei dem im Ausführungsbeispiel dargestellten Wärmetauscher handelt es sich um einen Abgaswärmetauscher 1 zur Kühlung der Abgase einer Brennkraftmaschine, insbesondere zur Kühlung der in bestimmten Betriebszuständen in den Brennraum der Brennkraftmaschine zurückgeführten Abgase (sogenannte Abgasrückführung).The heat exchanger shown in the exemplary embodiment is an exhaust gas heat exchanger 1 for cooling the exhaust gases of an internal combustion engine, in particular for cooling the exhaust gases recirculated into the combustion chamber of the internal combustion engine in certain operating states (so-called exhaust gas recirculation).

Der Abgaswärmetauscher 1 besitzt ein rohrförmiges Gehäuse 2 mit je einem Flansch 3, 4 auf der Einströmseite 5 bzw. der Ausströmseite 6. Das Gehäuse 2 ist u-förmig gestaltet, so dass die Flansche 3 und 4 seitlich nebeneinander liegen. Die u-förmigen Gehäuseteile sind untereinander durch eine Lasche 7 verbunden. Für die Befestigung des Wärmetauschers 1 am Brennkraftmaschinengehäuse ist ein Blechaufhänger 8 vorgesehen.The exhaust gas heat exchanger 1 has a tubular housing 2, each with a flange 3, 4 on the inflow 5 and the outflow 6. The housing 2 is U-shaped, so that the flanges 3 and 4 are laterally adjacent. The U-shaped housing parts are interconnected by a tab 7. For fixing the heat exchanger 1 on the engine housing a sheet metal hanger 8 is provided.

Nicht zu erkennen ist, dass im Inneren des Wärmetauscher-Gehäuses 2 ein sich in Längsrichtung erstreckendes Rohrbündel angeordnet ist, dass über je einen Rohrboden an den längsseitigen Gehäuseenden mit dem Gehäuse 2 dicht verschweißt ist.It can not be seen that a tube bundle extending in the longitudinal direction is arranged in the interior of the heat exchanger housing 2 and is welded tightly to the housing 2 via a respective tube plate at the longitudinal housing ends.

Dadurch entsteht zwischen dem Gehäuse 2 und dem Rohrbündel ein Kühlmittelraum für Kühlmittel zum Kühlen der durch die einzelnen Rohre des Rohrbündels selbst strömenden Abgase.This creates between the housing 2 and the tube bundle a coolant space for coolant for cooling the flowing through the individual tubes of the tube bundle itself exhaust gases.

Das Gehäuse 2 ist im Bereich des auf der Einströmseite 5 liegenden Flansches 3 außen von einem Kanalgehäuse 9, das gegenüber dem Gehäuse 2 einen Ringkanal 10 einschließt. Gemäß dem Ausführungsbeispiel besteht das Kanalgehäuse 9 aus Blech und ist mit dem Wärmetauscher-Gehäuse 2 durch Schweißen oder Löten verbunden. Das Kanalgehäuse 2 kann im Rahmen der Erfindung auch aus dem gleichen Werkstoff wie das Gehäuse 2 bestehen und mit diesem einstückig ausgeführt sein. Das Kanalgehäuse 2 besitzt eine Einlassöffnung 11 mit einem Anschlussstutzen 12 für einen Kühlmittelschlauch.The housing 2 is in the region of lying on the inflow 5 flange 3 outside of a channel housing 9, which encloses a ring channel 10 relative to the housing 2. According to the embodiment, the channel housing 9 is made of sheet metal and is connected to the heat exchanger housing 2 by welding or soldering. The channel housing 2 may in the context of the invention also consist of the same material as the housing 2 and be made in one piece with this. The channel housing 2 has an inlet opening 11 with a connecting piece 12 for a coolant hose.

In dem vom Kanalgehäuse 9 überdeckten Teil des Gehäuses 2 sind über den Umfang verteilt Durchtrittsöffnungen 13 bis 16 angeordnet. Über die Durchtrittsöffnungen 13 bis 16 kann damit das vom Anschlussstutzen 11 in den Ringkanal 10 geleitete Kühlmittel gleichmäßig verteilt in das Innere des Gehäuses 2 einströmen, so das neben einer weitgehend gleichmäßigen Aufheizung auch eine weitgehend gleichmäßige Strömungsgeschwindigkeit des Kühlmittels entlang der Oberfläche der vom Abgas durchströmten Rohre sichergestellt ist. Der Austritt des Kühlmittels aus dem Gehäuse 2 erfolgt in der Nähe des Flansches 4 auf der Ausströmseite 6 durch einen Anschlussstutzen 17.In the part of the housing 2 covered by the channel housing 9, passage openings 13 to 16 distributed over the circumference are arranged. Via the passage openings 13 to 16 can thus evenly distributed from the connecting piece 11 in the annular channel 10 coolant flow into the interior of the housing 2, so in addition to a substantially uniform heating and a largely uniform flow velocity of the coolant along the surface of the exhaust gas flowed through the pipes is ensured. The exit of the coolant from the housing 2 takes place in the vicinity of the flange 4 on the outflow side 6 through a connecting piece 17.

Gemäß dem Ausführungsbeispiel ist das Kanalgehäuse 9 mit den Durchtrittsöffnungen Bestandteil eines in das Gehäuse 2 integrierten Dehnungselementes 18. Damit das Kanalgehäuse 2 zusammen mit den Durchtrittsöffnungen 13 bis 16 neben der Kühlmittelzufuhr und Kühlmittelverteilung die Funktion eines Dehnungsausgleiches ausführen kann, sind die Durchtrittsöffnungen 13 bis 16 als Schlitze ausgeführt, die mit axialem Abstand voneinander jeweils über einen Teil des Umfanges angeordnet sind, während das die Schlitze nach außen abdeckende und aus Blech bestehende Kanalgehäuse 9 neben einem glatten zylindrischen Gehäuseabschnitt 19 zur Aufnahme des Anschlussstutzens 12 noch einen zusätzlichen Wellrohrabschnitt 20 für den Dehnungsausgleich besitzt.According to the exemplary embodiment, the channel housing 9 with the passage openings is part of an expansion element 18 integrated in the housing 2. In order for the channel housing 2, together with the passage openings 13 to 16, to perform the function of expansion compensation in addition to the coolant supply and coolant distribution, the passage openings 13 to 16 designed as slots, which are arranged at an axial distance from each other over part of the circumference, while the slots outwardly covering and made of sheet metal channel housing 9 next to a smooth cylindrical housing portion 19 for receiving the connecting piece 12 still an additional corrugated pipe section 20th has for the expansion compensation.

Damit möglichst die ganze Länge des Gehäuses 2 zur Kühlung genutzt werden kann, sind die Anschlussstutzen 12 und 17 dicht bei den Flanschen 3 und 4 angeordnet. Dies führt dazu, dass das Dehnungselement 17 dicht beim Flansch 3 positioniert ist, wobei der Gehäuseabschnitt 19 unmittelbar mit dem Gehäuse 2 und der Wellrohrabschnitt 20 unmittelbar mit dem Flansch 3 verschweißt bzw. verlötet ist. Mittels einer Schutzhülle 21 ist das Kanalgehäuse 9 gegen äußere Einflüsse geschützt.So that as far as possible the entire length of the housing 2 can be used for cooling, the connecting pieces 12 and 17 are arranged close to the flanges 3 and 4. This results in that the expansion element 17 is positioned close to the flange 3, wherein the housing portion 19 is welded directly to the housing 2 and the corrugated pipe section 20 directly to the flange 3 or soldered. By means of a protective cover 21, the channel housing 9 is protected against external influences.

Gemäß dem Ausführungsbeispiel ist der Gegenstand der Erfindung in der Kombination eines Wärmetauschers mit einem Dehnungselement dargestellt. Gleichwertig neben dieser Ausführungsform umfasst die Erfindung aber auch eine Ausführung eines Wärmetauschers ohne Dehnungselement, bei der das Kanalgehäuse 2 ohne den zusätzlichen Wellrohrabschnitt 20 ausgeführt ist und die Durchtrittsöffnungen 13 bis 16 als einfache Bohrungen hergestellt sind.According to the embodiment, the object of the invention is shown in the combination of a heat exchanger with an expansion element. Equivalent next to this embodiment, the invention also includes an embodiment of a heat exchanger without expansion element, in which the channel housing 2 is designed without the additional corrugated pipe section 20 and the passage openings 13 to 16 are made as simple holes.

Claims (5)

  1. A heat exchanger for cooling gaseous or liquid media, particularly an exhaust heat exchanger for an internal combustion engine, with a tubular housing which has at least one inlet opening with an adjoining annular duct for the distributed flow of a cooling medium into the interior of the housing, the annular duct (10) being formed on the outside of the housing (2) by a duct housing (9) surrounding a housing section at a distance and the annular duct (10) being connected to the housing interior via passage openings (13 to 16) distributed over the circumference of the housing (2), characterized in that the passage openings (13 to 16) are designed as slots which extend at an axial distance from one another over part of the housing circumference and, together with the duct housing (9) having a corrugated tube section (20), form an expansion element (18).
  2. The heat exchanger as claimed in claim 1, characterized in that next to the corrugated tube section (20) the duct housing (9) has a cylindrical housing part (19) which adjoins in the axial direction and on which the inlet opening (11) with the inlet branch (12) is arranged.
  3. The heat exchanger as claimed in claim 1, characterized in that the housing (2) is provided at the ends on the longitudinal sides with a respective flange (3, 4) for the connection of an exhaust pipe, and in that the expansion element (18) is provided at that end of the housing (2) which lies on the exhaust gas inflow side (5).
  4. The heat exchanger as claimed in claim 1, characterized in that the duct housing (2) is designed as a sheet-metal part which is connected tightly at one end to the housing (2) and at the other end to the flange (3) on the entry side.
  5. The heat exchanger as claimed in claim 1, characterized in that the expansion element (18) is surrounded by a protective covering (21).
EP04790976A 2003-11-08 2004-10-28 Heat exchanger, particularly exhaust heat exchanger Expired - Fee Related EP1690057B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10352221A DE10352221A1 (en) 2003-11-08 2003-11-08 Heat exchanger, in particular exhaust gas heat exchanger
PCT/EP2004/012206 WO2005047799A1 (en) 2003-11-08 2004-10-28 Heat exchanger, particularly exhaust heat exchanger

Publications (2)

Publication Number Publication Date
EP1690057A1 EP1690057A1 (en) 2006-08-16
EP1690057B1 true EP1690057B1 (en) 2007-04-25

Family

ID=34559493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04790976A Expired - Fee Related EP1690057B1 (en) 2003-11-08 2004-10-28 Heat exchanger, particularly exhaust heat exchanger

Country Status (5)

Country Link
US (1) US20070144157A1 (en)
EP (1) EP1690057B1 (en)
BR (1) BRPI0415736A (en)
DE (2) DE10352221A1 (en)
WO (1) WO2005047799A1 (en)

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DE3027510A1 (en) * 1980-07-19 1982-02-18 Hochtemperatur Reaktorbau Gmbh DOME LID FOR CLOSING A VERTICAL EXCEPTION IN A PRESSURE VESSEL
FR2497937B1 (en) * 1981-01-13 1986-03-07 Stein Industrie TUBE BEAM HEAT EXCHANGE DEVICE WITH EXPANSION LYRES SUBTRACTED TO VIBRATION
US4838581A (en) * 1985-02-05 1989-06-13 Asahi Glass Company Ltd. Joint structure for a tube support plate and a tube
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DE29612361U1 (en) * 1996-07-19 1996-08-29 Wahler Gmbh & Co Gustav Cooler for gaseous or liquid media, in particular exhaust gas cooler, for an internal combustion engine
JP2000045884A (en) * 1998-07-24 2000-02-15 Hino Motors Ltd Egr cooler
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Also Published As

Publication number Publication date
EP1690057A1 (en) 2006-08-16
BRPI0415736A (en) 2006-12-19
WO2005047799A1 (en) 2005-05-26
DE502004003643D1 (en) 2007-06-06
US20070144157A1 (en) 2007-06-28
DE10352221A1 (en) 2005-06-09

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