EP1690057A1 - Heat exchanger, particularly exhaust heat exchanger - Google Patents

Heat exchanger, particularly exhaust heat exchanger

Info

Publication number
EP1690057A1
EP1690057A1 EP04790976A EP04790976A EP1690057A1 EP 1690057 A1 EP1690057 A1 EP 1690057A1 EP 04790976 A EP04790976 A EP 04790976A EP 04790976 A EP04790976 A EP 04790976A EP 1690057 A1 EP1690057 A1 EP 1690057A1
Authority
EP
European Patent Office
Prior art keywords
housing
heat exchanger
channel
exchanger according
expansion element
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
EP04790976A
Other languages
German (de)
French (fr)
Other versions
EP1690057B1 (en
Inventor
Peter Kalisch
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1690057A1 publication Critical patent/EP1690057A1/en
Application granted granted Critical
Publication of EP1690057B1 publication Critical patent/EP1690057B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

  • Heat exchangers in particular exhaust gas heat exchangers
  • 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, with a tubular housing which has at least one inlet opening with an adjoining annular channel for the distributed inflow of a cooling medium into the interior of the housing.
  • Such a heat exchanger is known from DE 102 38 882 AI and comprises a tubular housing in which a tube bundle for the axial flow of the exhaust gas is inserted, the tube bundle being flushed with an introduced coolant.
  • a tube bundle for the axial flow of the exhaust gas is inserted, the tube bundle being flushed with an introduced coolant.
  • thermal voltages arise during operation of the exhaust gas heat exchanger due to different expansions of the pipes and the housing.
  • slots are arranged in the housing, which are sealed to the outside by a duct housing with a corrugated tube section. This creates an expansion compensation element integrated in the heat exchanger housing.
  • the coolant is fed into the interior of the housing via an inlet opening made radially in the housing and an annular channel following downstream, through which one uniform distribution of the coolant flowing into the interior of the housing is to take place.
  • the ring channel located inside the housing affects the cross-section through which the flow can flow and the manufacture of the heat exchanger.
  • the ring channel alone, the most uniform possible circumferential distribution of the coolant over the interior of the housing and a largely uniform flow rate of the coolant inside the housing cannot yet be achieved.
  • DE 296 12 361 Ul discloses another heat exchanger with an expansion compensation element integrated in the heat exchanger housing made of sheet metal.
  • the invention is based on the object of further designing the generic heat exchanger in such a way that, with a simplified structure, a uniform inflow of coolant into the interior of the housing distributed over the circumference of the housing can be reliably achieved.
  • the arrangement according to the invention of the ring channel on the outside of the housing ensures that the interior of the housing is no longer impaired in terms of installation space by the ring channel.
  • the inlet opening is arranged on the channel housing and has a connecting piece for a hose line.
  • the heat exchanger housing and the duct housing are made in one piece, e.g. is made by casting. Irrespective of this, it is also conceivable to produce the duct housing, for example from sheet metal, separately from the heat exchanger housing and to connect it tightly by welding or soldering.
  • the duct housing is formed with a corrugated tube section and the passage openings are designed as slots which partially extend at an axial distance from one another over the circumference of the heat exchanger housing.
  • the integrated expansion element simultaneously takes on the function of evenly distributing the coolant inside the housing.
  • the expansion element with the inlet opening is arranged at the inlet end of the housing, the duct housing having a smooth one cylindrical part on the heat exchanger housing and the subsequent corrugated tube section is welded or soldered to the inlet-side flange of the housing.
  • 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 returned to 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 side 5 and the outflow side 6.
  • the housing 2 is U-shaped, so that the flanges 3 and 4 lie side by side.
  • the U-shaped housing parts are interconnected by a tab 7.
  • a sheet metal hanger 8 is provided for fastening the heat exchanger 1 to the internal combustion engine housing.
  • a tube bundle extending in the longitudinal direction is arranged in the interior of the heat exchanger housing 2 and is tightly welded to the housing 2 via a tube plate at the longitudinal housing ends. This creates a coolant space for coolant between the housing 2 and the tube bundle for cooling the exhaust gases flowing through the individual tubes of the tube bundle itself.
  • the housing 2 is in the region of the flange 3 lying on the inflow side 5 outside of a channel housing 9, which encloses an annular channel 10 relative to the housing 2.
  • the channel housing 9 consists of sheet metal and is connected to the heat exchanger housing 2 by welding or soldering.
  • the channel housing 2 can also consist of the same material as the housing 2 and can be made in one piece with it.
  • the channel housing 2 has an inlet opening 11 with a connecting piece 12 for a coolant hose.
  • passage openings 13 to 16 are arranged distributed over the circumference. Via the passage openings 13 to 16, the coolant directed from the connecting piece 11 into the annular channel 10 can thus flow into the interior of the housing 2 in a uniformly distributed manner, so that, in addition to a largely uniform heating, a largely uniform flow rate of the coolant along the surface of the pipes through which the exhaust gas flows is ensured.
  • the coolant emerges from the housing 2 in the vicinity of the flange 4 on the outflow side 6 through a connecting piece 17.
  • the duct housing 9 with the passage openings is a component of an expansion element 18 integrated in the housing 2.
  • Openings 13 to 16 are designed as slots, each of which is arranged at an axial distance from one another over part of the circumference, while the channel housing 9, which covers the slots and is made of sheet metal, in addition to a smooth cylindrical housing section 19 for receiving the connecting piece 12, also has an additional corrugated pipe section 20 for the expansion compensation.
  • the connecting pieces 12 and 17 are arranged close to the flanges 3 and 4. This leads to the expansion element 17 being positioned close to the flange 3, the housing section 19 being welded or soldered directly to the housing 2 and the corrugated pipe section 20 directly to the flange 3.
  • the duct housing 9 is protected against external influences by means of a protective cover 21.
  • the subject 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 an expansion element, in which the channel housing 2 is designed without the additional corrugated tube section 20 and the through openings 13 to 16 are produced as simple bores.

Landscapes

  • 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)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The invention relates to a heat exchanger, especially an exhaust heat exchanger (1) for an internal combustion engine. Said heat exchanger (1) comprises a tubular housing (2), a section of which is externally surrounded by a duct housing (9) so as to form an annular duct (10). Said duct housing (9) is provided with a coolant connection (connecting sleeve 12) and passage holes (13 to 16) which are distributed across the circumference thereof in the housing section that is covered by the duct housing (9) and via which an even distribution of the coolant is obtained inside the housing (2). Advantageously, the annular duct (10) and the passage holes (13 to 16) are also used for forming the expansion element (18) of the heat exchanger (1) if the heat exchanger (1) comprises an expansion element (18).

Description

Wärmetauscher, insbesondere Abgaswärmetauscher Heat exchangers, in particular exhaust gas heat exchangers
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, with a tubular housing which has at least one inlet opening with an adjoining annular channel for the distributed inflow of a cooling medium into the interior of the housing.
Ein derartiger Wärmetauscher ist aus der DE 102 38 882 AI 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 known from DE 102 38 882 AI and comprises a tubular housing in which a tube bundle for the axial flow of the exhaust gas is inserted, the tube bundle being flushed with an introduced coolant. As a result of different temperature exposure of the pipes on the one hand and the housing on the other hand, thermal voltages arise during operation of the exhaust gas heat exchanger due to different expansions of the pipes and the housing. To compensate for such stresses, slots are arranged in the housing, which are sealed to the outside by a duct housing with a corrugated tube section. This creates an expansion compensation element integrated in the heat exchanger housing.
Die Zuführung des Kühlmittels in das Gehäuseinnere erfolgt über eine radial in das Gehäuse eingebrachte Einlassδffnung und einen stromab folgenden Ringkanal, durch den eine gleichmäßige Verteilung des in das Gehäuseinnere einströmenden Kühlmittels erfolgen soll.The coolant is fed into the interior of the housing via an inlet opening made radially in the housing and an annular channel following downstream, through which one uniform distribution of the coolant flowing into the interior of the housing 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 ring channel located inside the housing affects the cross-section through which the flow can flow and the manufacture of the heat exchanger. In addition, with the ring channel alone, the most uniform possible circumferential distribution of the coolant over the interior of the housing and a largely uniform flow rate of the coolant inside the housing cannot yet be achieved.
Ferner ist aus der DE 296 12 361 Ul ein weiterer Wärmetauscher mit einem in das aus Blech bestehende Wärmetauscher- Gehäuse integrierten Dehnungsausgleichselement bekannt.Furthermore, DE 296 12 361 Ul discloses another heat exchanger with an expansion compensation element integrated in the heat exchanger housing made of sheet metal.
Der Erfindung liegt die Aufgabe zu Grunde, den gattungs- gemäßen 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 of further designing the generic heat exchanger in such a way that, with a simplified structure, a uniform inflow of coolant into the interior of the housing distributed over the circumference of the housing can be reliably achieved.
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 patent claim 1.
Durch die erfindungsgemäße Anordnung des Ringkanales außen am Gehäuse wird erreicht, dass das Gehäuseinnere dμrch den Ringkanal bauraummäßig nicht mehr beeinträchtigt wird.The arrangement according to the invention of the ring channel on the outside of the housing ensures that the interior of the housing is no longer impaired in terms of installation space by the ring channel.
Ferner ist es möglich, durch eine einfache Verteilung von Durchtrittsoffnungen im Gehäuse eine über dessen Umfang verteilte gleichmäßige Einströmung von Kühlmittel in das Gehäuseinnere zu erzielen. In weiterer Ausgestaltung der Erfindung ist es vorteilhaft, wenn die Einlassöffnung am Kanalgehäuse angeordnet ist und einen Anschlussstutzen für eine Schlauchleitung aufweist.Furthermore, it is possible to achieve a uniform inflow of coolant into the interior of the housing distributed over its circumference by simply distributing through openings in the housing. 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 if the heat exchanger housing and the duct housing are made in one piece, e.g. is made by casting. Irrespective of this, it is also conceivable to produce the duct housing, for example from sheet metal, separately from the heat exchanger housing and to connect it tightly by welding or soldering.
Bei einer Ausgestaltung des Wärmetauschers mit einem Kanal- gehäuse 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 the case of a design of the heat exchanger with a duct housing made of sheet metal, it is also advantageous within the scope of the invention if parts of the heat exchanger housing and the duct housing are used simultaneously to form an expansion element which is common in heat exchangers of this type. This creates a heat exchanger that is compact and can be manufactured 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 Durchtrittsoffnungen 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 duct housing is formed with a corrugated tube section and the passage openings are designed as slots which partially extend at an axial distance from one another over the circumference of the heat exchanger housing. In the heat exchanger created in this way, the integrated expansion element simultaneously takes on the function of evenly distributing 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 be able to use the entire length of the heat exchanger housing for cooling as far as possible, the expansion element with the inlet opening is arranged at the inlet end of the housing, the duct housing having a smooth one cylindrical part on the heat exchanger housing and the subsequent corrugated tube section is welded or soldered to the inlet-side flange of the housing.
Die Erfindung ist nachfolgend anhand eines in der Zeichnung gezeigten Ausführungsbeispieles näher erläutert.The invention is explained below 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 returned to 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 side 5 and the outflow side 6. The housing 2 is U-shaped, so that the flanges 3 and 4 lie side by side. The U-shaped housing parts are interconnected by a tab 7. A sheet metal hanger 8 is provided for fastening the heat exchanger 1 to the internal combustion engine housing.
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 . 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.It cannot be seen that a tube bundle extending in the longitudinal direction is arranged in the interior of the heat exchanger housing 2 and is tightly welded to the housing 2 via a tube plate at the longitudinal housing ends. This creates a coolant space for coolant between the housing 2 and the tube bundle for cooling the exhaust gases flowing through the individual tubes of the tube bundle itself.
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 the flange 3 lying on the inflow side 5 outside of a channel housing 9, which encloses an annular channel 10 relative to the housing 2. According to the exemplary embodiment, the channel housing 9 consists of sheet metal and is connected to the heat exchanger housing 2 by welding or soldering. In the context of the invention, the channel housing 2 can also consist of the same material as the housing 2 and can be made in one piece with it. 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 Durchtrittsoffnungen 13 bis 16 angeordnet. Über die Durchtrittsoffnungen 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 Ausstrόmseite 6 durch einen Anschlussstutzen 17.In the part of the housing 2 covered by the channel housing 9, passage openings 13 to 16 are arranged distributed over the circumference. Via the passage openings 13 to 16, the coolant directed from the connecting piece 11 into the annular channel 10 can thus flow into the interior of the housing 2 in a uniformly distributed manner, so that, in addition to a largely uniform heating, a largely uniform flow rate of the coolant along the surface of the pipes through which the exhaust gas flows is ensured. The coolant emerges from the housing 2 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 Durchtrittsoffnungen Bestandteil eines in das Gehäuse 2 integrierten Dehnungselementes 18. Damit das Kanalgehäuse 2 zusammen mit den Durchtrittsoffnungen 13 bis 16 neben der Kühlmittelzufuhr und Kühlmittelverteilung die Funktion eines Dehnungsausgleiches ausführen kann, sind die Durchtritts- Öffnungen 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 duct housing 9 with the passage openings is a component of an expansion element 18 integrated in the housing 2. Openings 13 to 16 are designed as slots, each of which is arranged at an axial distance from one another over part of the circumference, while the channel housing 9, which covers the slots and is made of sheet metal, in addition to a smooth cylindrical housing section 19 for receiving the connecting piece 12, also has an additional corrugated pipe section 20 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 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 leads to the expansion element 17 being positioned close to the flange 3, the housing section 19 being welded or soldered directly to the housing 2 and the corrugated pipe section 20 directly to the flange 3. The duct housing 9 is protected against external influences by means of a protective cover 21.
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 Durchtrittsoffnungen 13 bis 16 als einfache Bohrungen hergestellt sind. According to the embodiment, the subject of the invention is shown in the combination of a heat exchanger with an expansion element. Equivalent to this embodiment, the invention also includes an embodiment of a heat exchanger without an expansion element, in which the channel housing 2 is designed without the additional corrugated tube section 20 and the through openings 13 to 16 are produced as simple bores.

Claims

Patentansprüche claims
1. Wärmetauscher zum Kühlen von gas- oder flüssigen Medien, insbesondere 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, dadurch gekennzeichnet, dass der Ringkanal (10) außen am Gehäuse (2) durch ein einen Gehäuseabschnitt mit Abstand umgebendes Kanal- gehäuse (9) gebildet ist, wobei der Ringkanal (10) über am Umfang des Gehäuses (2) verteilt angeordnete Durchtrittsoffnungen (13 bis 16) mit dem Gehäuseinneren verbunden ist .1. Heat exchanger for cooling gas or liquid media, in particular exhaust gas heat exchanger for an internal combustion engine, with a tubular housing which has at least one inlet opening with an adjoining ring channel for the distributed inflow of a cooling medium into the interior of the housing, characterized in that the ring channel (10) on the outside of the housing (2) is formed by a channel housing (9) surrounding a housing section at a distance, the annular channel (10) with the interior of the housing via passage openings (13 to 16) distributed around the circumference of the housing (2) connected is .
2. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass die Einlassöffnung (11) am Kanalgehäuse (9) angeordnet ist und einen Anschlussstutzen (12) für eine Schlauchleitung aufweist.2. Heat exchanger according to claim 1, characterized in that the inlet opening (11) is arranged on the channel housing (9) and has a connecting piece (12) for a hose line.
3. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass das Kanalgehäuse (9) mit dem Wärmetauseher- Gehäuse (2) einstückig ausgebildet ist. 3. Heat exchanger according to claim 1, characterized in that the channel housing (9) with the heat exchanger housing (2) is integrally formed.
4. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass das Kanalgehäuse (9) mit dem Wärmetauscher-Gehäuse (2) durch Schweißen oder Löten dicht verbunden ist.4. Heat exchanger according to claim 1, characterized in that the channel housing (9) with the heat exchanger housing (2) is tightly connected by welding or soldering.
5. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass die Durchtrittsoffnungen (13 bis 16) als sich über einen Teil des Gehäuseumfanges mit axialem Abstand voneinander erstreckende Schlitze ausgebildet sind, die zusammen mit dem einen Wellrohrabschnitt (20) aufweisenden Kanalgehäuse (9) ein Dehnungselement (18) bilden.5. Heat exchanger according to claim 1, characterized in that the passage openings (13 to 16) are formed as a part of the housing circumference with axially spaced slots, which together with the one corrugated pipe section (20) having a channel housing (9) an expansion element (18) form.
6. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass das Kanalgehäuse (9) neben dem Wellrohrabschnitt (20) einen sich in axialer Richtung anschließenden zylindrischen Gehäuseteil (19) aufweist, an dem die Einlassöffnung (11) mit dem Einlassstutzen (12) angeordnet ist.6. Heat exchanger according to claim 1, characterized in that the channel housing (9) next to the corrugated tube section (20) has an adjoining axial housing part (19) on which the inlet opening (11) with the inlet connector (12) is arranged ,
7. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass das Gehäuse (2) an den längsseitigen Enden jeweils mit einem Flansch (3, 4) zum Anschluss einer Abgasleitung versehen ist und dass das Dehnungselement (18) an dem auf der Abgas-Einströmseite 5 liegenden Ende des Gehäuses (2) vorgesehen ist.7. Heat exchanger according to claim 1, characterized in that the housing (2) is provided at the longitudinal ends with a flange (3, 4) for connecting an exhaust pipe and that the expansion element (18) on the exhaust gas inflow side 5 lying end of the housing (2) is provided.
8. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass das Kanalgehäuse (2) als Blechteil ausgeführt ist, das mit einem Ende am Gehäuse (2) und mit dem anderen Ende am eintrittseitigen Flansch (3) dicht verbunden ist8. Heat exchanger according to claim 1, characterized in that the channel housing (2) is designed as a sheet metal part, which is tightly connected at one end to the housing (2) and at the other end to the inlet-side flange (3)
9. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass das Dehnungselement (18) von einem Schutzhülle (21) umgeben ist. 9. Heat exchanger according to claim 1, characterized in that the expansion element (18) is surrounded by a protective cover (21).
EP04790976A 2003-11-08 2004-10-28 Heat exchanger, particularly exhaust heat exchanger Expired - Lifetime 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

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

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EP04790976A Expired - Lifetime EP1690057B1 (en) 2003-11-08 2004-10-28 Heat exchanger, particularly exhaust heat exchanger

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

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Also Published As

Publication number Publication date
BRPI0415736A (en) 2006-12-19
DE502004003643D1 (en) 2007-06-06
EP1690057B1 (en) 2007-04-25
WO2005047799A1 (en) 2005-05-26
DE10352221A1 (en) 2005-06-09
US20070144157A1 (en) 2007-06-28

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