EP1348924B1 - Echangeur de chaleur à gaz d'échappement pour véhicule - Google Patents

Echangeur de chaleur à gaz d'échappement pour véhicule Download PDF

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Publication number
EP1348924B1
EP1348924B1 EP03004716A EP03004716A EP1348924B1 EP 1348924 B1 EP1348924 B1 EP 1348924B1 EP 03004716 A EP03004716 A EP 03004716A EP 03004716 A EP03004716 A EP 03004716A EP 1348924 B1 EP1348924 B1 EP 1348924B1
Authority
EP
European Patent Office
Prior art keywords
exhaust
heat exchanger
gas
flat
paths
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP03004716A
Other languages
German (de)
English (en)
Other versions
EP1348924A3 (fr
EP1348924A2 (fr
Inventor
Wolfgang Dipl.-Ing. Knecht (Fh)
Roland Dipl.-Ing. Strähle (FH)
Jörg Dr. Soldner
Walter Dipl.-Ing. Gühring (FH)
Rainer Dipl.-Ing. Kaissling
Harald Dipl.-Ing. Schatz
Andreas Dipl.-Ing. Stolz
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.)
Modine Manufacturing Co
Original Assignee
Modine Manufacturing Co
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 Modine Manufacturing Co filed Critical Modine Manufacturing Co
Publication of EP1348924A2 publication Critical patent/EP1348924A2/fr
Publication of EP1348924A3 publication Critical patent/EP1348924A3/fr
Application granted granted Critical
Publication of EP1348924B1 publication Critical patent/EP1348924B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • 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
    • F28D7/1684—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 the conduits having a non-circular cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/10—Particular pattern of flow of the heat exchange media
    • F28F2250/104—Particular pattern of flow of the heat exchange media with parallel flow

Definitions

  • the invention relates to an exhaust gas heat exchanger for motor vehicles, which consists of a stack of heat exchanger plates and which has the further features of the preamble of claim 1.
  • An exhaust gas heat exchanger is out of the DE 101 24 383 known.
  • the known exhaust gas heat exchanger has single-flow exhaust paths. For example, if the exhaust gas of an internal combustion engine with multiple cylinders, for example with six cylinders to recool, under certain circumstances, two exhaust lines for each three cylinders must be present, in each strand such a known exhaust gas heat exchanger would have to be arranged.
  • the object of the invention is to design an exhaust gas heat exchanger so that it can be constructed inexpensively as a single-flow or optionally also as a multi-flow exhaust heat exchanger.
  • the cooling water paths are designed as "open" paths, so that the cooling water has contact with the housing.
  • This has the advantage that the housing is not heated as much as in the exhaust gas heat exchanger from the DE 101 24 383 A1 where the hot exhaust gas is in contact with the housing.
  • the flat tube halves are provided at their broad sides with transverse ribs to force the cooling water to the snake-like flow through the cooling water paths.
  • between the transverse ribs and support studs may be arranged to raise the turbulence of the cooling water. At a relatively small distance can possibly be dispensed with support knobs.
  • the housing is preferably formed in two parts, which is also advantageous in terms of manufacturability, because the pairs of flat tube halves can be easily inserted into the housing. Both housing parts are connected to each other at about half the height of the stack of flat tube halves or half the width of the flat tube halves.
  • the housing parts are approximately U - shaped in cross section - simply folded on both sides. The transverse ends are undeformed.
  • Claim 3 ensures in a cost effective manner, the fluidic separation of the two exhaust paths. This advantage can also affect the features
  • the exhaust gas heat exchanger of the embodiment is constructed of formed stainless steel sheets.
  • the items of the exhaust gas heat exchanger are, as described below, assembled and connected in a brazing furnace. Since the coating of the stainless steel sheets with a solder material is still problematic, solder foils / pastes are preferably applied or provided at the connecting seams between the individual parts in a manner known per se and therefore not to be described in detail.
  • the essential individual parts of the exhaust gas heat exchanger in the embodiment shown are the flat tube halves 1 , the separating elements 15 , the tube plates 19 , the connecting flanges 12 and the housing. 2
  • the flat tube halves 1 are produced from strip to forming machines. All flat tube halves 1 are identical, which means that they can be produced with the same tool.
  • the flat tube halves 1 have beveled longitudinal edges 14 .
  • FIG. 7 The longitudinal edges 14 are bent in an L shape, wherein the short leg of the arm in the exemplary embodiment is provided in each case for the connection of two flat tube halves 1 , since with these short legs there are respectively two Flat tube halves 1 to each other and form a connecting surface 21st At this connection surface 21 are spaced-apart projections, tabs 22 or the like, are provided, which serve the mechanical connection of two flat tube halves 1 to a pair.
  • a flat tube half 1 is rotated by 180 ° in order to be able to be attached with its longitudinal edges 14 to the longitudinal edges 14 of the other flat tube half 1 .
  • Trennelemet 15 which is a prefabricated rod of the same material in the embodiment, inserted in the longitudinal direction of the flat tube.
  • two separate exhaust gas passages 4.1 and 4.2 result later within a flat tube .
  • smooth-walled inner inserts 33 (FIG. Fig. 7 ) is inserted in the exhaust gas paths 4.1 and 4.2 .
  • the function of the separating element 15 has been formed by a partition wall within a one-piece inner insert 33 .
  • the shown embodiment of the separating element 15 is more useful, because by the juxtaposition of several inner inserts 33 in the longitudinal direction of the exhaust gas heat exchanger each set at the joints of adjacent inner inserts 33 sealing problems , Thereafter, the already mentioned tabs 22 are bent over - and seen - in the longitudinal direction - alternately upwards and downwards - to reach over the connecting edge 21 and thus to fix the pair of flat tube halves 1 to a flat tube.
  • the broad sides 23 of the flat tubes thus formed have embossed transverse ribs 31 and in this embodiment also supporting nubs 30 .
  • the transverse ribs 31 and the Abstütznoppen 30 have on all flat tube halves 1, the same position.
  • the transverse ribs 31 do not extend over the entire width of the flat tube halves 1 but advantageously (see below) only over about half the width. They are arranged in alternating positions to the two longitudinal edges 14 of the flat tube halves 1 , ie, on a transverse rib 31 , which ends approximately at a longitudinal edge 14 follows the next transverse rib 31 , which ends at the opposite other longitudinal edge 14 , etc.
  • Fig. 1 can be seen better, the pairs of flat tube halves 1 on top of each other stacked.
  • the support nubs 30 and the transverse ribs 31 of adjacent pairs of flat tube halves 1 come to rest against each other, to be connected later.
  • the tube plates 19 are attached to both open ends 40 and 50 of the flat tubes and mounted. The ends are inserted into the corresponding openings 18 of the tubesheets 19 , so that there later a quality soldering connection is possible.
  • the prefabricated unit described so far is inserted into a housing half 2a and enclosed by means of the other housing half 2b .
  • the exhaust gas heat exchanger is completed by the attachment of the connecting flanges 12 at the opposite ends 40 and 50 and at the end faces 11 and by the connections 13 for the cooling water, which are arranged on a longitudinal wall 10 of the housing 2 .
  • the terminals 13 are noteworthy, since they are quite simply formed by means of one approximately over the entire height of the stack 13 reaching slot 32 in the longitudinal wall 10 of the housing 2 , via the (slot 32 ) to the longitudinal wall 10 open towards ports 13 are attached , As a result, in addition to the very production-friendly design, a relatively uniform and low pressure loss-causing division of the cooling liquid to the "open" cooling water paths 5 is achieved. (see also Fig. 1 . 4 and 6
  • the slots 32 are, as shown in the cited figures, arranged in the longitudinal sides of the housing 2 in which the two housing halves 2a , 2b are joined together.
  • one slot 32 (connection 13 ) in one longitudinal wall 10 and the other slot 32 (connection 13 ) could be arranged in the opposite longitudinal wall 10 .
  • the continuous longitudinal sides of the housing 2 are arranged above and below or parallel to the flat tube halves 1 .
  • the strut 17 is located exactly on the line passing through the dividers 15 ( Fig. 2 ) is described in each flat tube. (In the case of several lines of separating elements 15 or more than two exhaust gas paths in each flat tube, corresponding to a plurality of struts 17 ).
  • the strut 17 has projections 60 on its side facing the open flat tube ends 40 , 50 . The projections 60 coincide in their thickness with the height of the cooling water paths 5 and with the distance between the pairs of flat tube halves 1 .
  • the transverse ribs 31 in their length I do not extend beyond the position of the separating elements 15 . Since in the exemplary embodiment only a number of separating elements 15 is provided and the row is arranged approximately in the middle of the exhaust path 4 , the length I of the transverse ribs 31 should be shorter than the dimension L, measured from the edge 14 to the separator 15. If this condition is respected, it is certainly not necessary, other u. U.
  • FIGS. 12 also show how the housing halves 2 a , 2 b are interconnected. Namely, each of the legs of the U-shaped housing halves 2a, 2b at its longitudinal edge by about the thickness of material deposited to the outside, so that in each case the other undeformed leg can be attached and connected with its longitudinal edge from the inside to the remote longitudinal edge of the other housing half , Since the overlap of the longitudinal edges and thus the size of the connecting surface is a pure dimensioning, it can be expected that the tight connection of the housing halves 2a , 2b meets high quality standards.
  • both housing halves 2a and 2b are identical except for the arrangement of the slots 32 for the terminals 13 (see above), which is undoubtedly a manufacturing advantage. If the housing 2 is rotated by 90 ° about the longitudinal axis and the slots 32 are provided in the other (continuous) longitudinal walls of the housing 2 (see above), then the housing halves 2a , 2b are completely identical.
  • the Fig. 6 shows that it is possible, two exhaust strands of the engine (although not shown) to lead together on the connecting flange 12 and the exhaust, fluidly separated from each other, to cool in the exhaust paths 4.1 and 4.2 , to then pass it separately separately, because in the picture rear flange 12 is also identical to the front flange 12th

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

Claims (9)

  1. Echangeur de chaleur à gaz d'échappement pour véhicule automobile, qui se compose d'un empilement de plaques d'échangeur de chaleur (1), dans lequel l'empilement (3) de plaques d'échangeur de chaleur (1) comprend des chemins de gaz d'échappement (4) qui comportent des inserts internes (33) et des chemins d'eau de refroidissement (5), les chemins de gaz d'échappement (4) et les chemins d'eau de refroidissement (5) alternent dans la direction d'empilement, dans lequel les premiers chemins sont chaque fois enclos à l'intérieur d'une paire de plaques d'échangeur de chaleur (1) et les autres chemins sont chaque fois disposés entre les paires, des brides de raccordement de gaz d'échappement (12) sont disposées sur des faces frontales opposées (11), de telle manière que les gaz d'échappement puissent circuler sur un chemin rectiligne à travers l'échangeur de chaleur à gaz d'échappement, dans lequel chaque fois deux plaques d'échangeur de chaleur sont réalisées en forme de moitiés identiques de tube plat (1) et sont assemblées en position inversée sur leurs bords longitudinaux repliés (14) et délimitent ainsi le chemin des gaz d'échappement (4), dans lequel les extrémités (40, 50) des moitiés de tube plat (1) débouchent dans des ouvertures (18) de fonds à tubes (19), et avec des raccords (13) pour l'eau de refroidissement, caractérisé en ce que l'empilement de plaques d'échangeur de chaleur (1) est entouré par une enceinte (2), dans lequel les raccords (13) pour l'eau de refroidissement sont disposés sur la paroi (10) de l'enceinte (2), en ce que chaque chemin de gaz d'échappement (4) est divisé en deux ou plusieurs chemins de gaz d'échappement (4.1, 4.2) séparés l'un de l'autre par un ou plusieurs éléments de séparation (15), qui sont prévus dans le chemin de gaz d'échappement (4), en ce que les chemins d'eau de refroidissement (5) sont ouverts vers l'enceinte (2) et sont pourvus de nervures transversales (31) disposées sur les moitiés de tube plat (1), qui obligent l'eau de refroidissement à parcourir un trajet sinueux à travers les chemins d'eau de refroidissement (5), en ce que les brides de raccordement de gaz d'échappement (12) présentent des entretoises (17) disposées en fonction du nombre des éléments de séparation (15), lesquelles sont disposées exactement sur les lignes qui sont décrites par les éléments de séparation (15) dans chaque tube plat, et en ce que les entretoises (17) présentent, sur leurs côtés orientés vers les extrémités de tube plat ouvertes (40, 50), des saillies (60) qui s'ajustent dans l'écartement entre les paires de moitiés de tube plat (1) et qui rendent étanches l'un par rapport à l'autre les chemins de gaz d'échappement (4.1, 4.2).
  2. Echangeur de chaleur à gaz d'échappement selon la revendication 1, caractérisé en ce que soit les fonds à tubes (19) et les brides de raccordement (12) sont des tôles plates qui sont assemblées à plat au bord (20) soit les fonds à tubes (19) et les brides de raccordement (12) sont réunis en un composant unique.
  3. Echangeur de chaleur à gaz d'échappement selon l'une quelconque des revendications précédentes, caractérisé en ce que les éléments de séparation (15) sont des barres ou des parois longitudinales intégrées dans l'insert interne (33), qui séparent l'un de l'autre les chemins de gaz d'échappement (4.1, 4.2).
  4. Echangeur de chaleur à gaz d'échappement selon l'une quelconque des revendications précédentes, caractérisé en ce que les gaz d'échappement circulent dans la même direction dans les chemins de gaz d'échappement (4.1, 4.2).
  5. Echangeur de chaleur à gaz d'échappement selon l'une quelconque des revendications précédentes, caractérisé en ce que les éléments de séparation (15) s'étendent sur toute la longueur des moitiés de tube plat (1).
  6. Echangeur de chaleur selon la revendication 1, caractérisé en ce que la longueur (1) des nervures transversales (31) est plus courte que la dimension (L), mesurée depuis le bord (14) des moitiés de tube plat (1) jusqu'à la position du/des élément(s) de séparation (15).
  7. Echangeur de chaleur selon les revendications 1 et 6, caractérisé en ce que des empreintes d'appui (30) sont imprimées dans les faces larges (23) des moitiés de tube plat (1), entre les nervures transversales (31), dans lequel les empreintes d'appui (30) de paires voisines de moitiés de tube plat (1) sont - exactement comme les nervures transversales (31) - appliquées les unes sur les autres et doivent être assemblées.
  8. Echangeur de chaleur selon la revendication 1, caractérisé en ce que les raccords (13) sont réalisés en forme de caissons de raccordement ouverts d'un côté, qui sont posés avec leur côté ouvert sur au-dessus d'une fente (32) dans la paroi longitudinale (10) de l'enceinte (2), dans lequel la fente (32) et les caissons de raccordement s'étendent pratiquement sur toute la hauteur de l'empilement (3) des moitiés de tube plat (1).
  9. Echangeur de chaleur selon la revendication 1, caractérisé en ce que les bords longitudinaux (14) des moitiés de tube plat (1) sont repliés sensiblement en forme de L et des faces d'assemblage (21) sont formées chaque fois avec une branche du L, et en ce que des pattes (22) espacées dans la direction longitudinale des moitiés de tube plat (1) sont saillantes sur les branches, et sont repliées vers le haut et vers le bas en une succession alternée, afin d'assembler chaque fois deux moitiés de tube plat (1) en une paire.
EP03004716A 2002-03-30 2003-03-04 Echangeur de chaleur à gaz d'échappement pour véhicule Expired - Fee Related EP1348924B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10214467A DE10214467A1 (de) 2002-03-30 2002-03-30 Abgaswärmetauscher für Kraftfahrzeuge
DE10214467 2002-03-30

Publications (3)

Publication Number Publication Date
EP1348924A2 EP1348924A2 (fr) 2003-10-01
EP1348924A3 EP1348924A3 (fr) 2007-05-02
EP1348924B1 true EP1348924B1 (fr) 2009-05-13

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EP03004716A Expired - Fee Related EP1348924B1 (fr) 2002-03-30 2003-03-04 Echangeur de chaleur à gaz d'échappement pour véhicule

Country Status (3)

Country Link
US (1) US6920918B2 (fr)
EP (1) EP1348924B1 (fr)
DE (2) DE10214467A1 (fr)

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DE102013218444A1 (de) 2012-09-17 2014-03-20 Behr Gmbh & Co. Kg Wärmetauscher
KR101704945B1 (ko) 2012-09-28 2017-02-08 발레오 시스템므 떼르미끄 열 교환기

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DE50311513D1 (de) 2009-06-25
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EP1348924A2 (fr) 2003-10-01
US20030196785A1 (en) 2003-10-23
US6920918B2 (en) 2005-07-26

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