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EP1657512B1 - Echangeur de chaleur avec un profilé ouvert en tant que boîtier - Google Patents

Echangeur de chaleur avec un profilé ouvert en tant que boîtier Download PDF

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Publication number
EP1657512B1
EP1657512B1 EP04026647A EP04026647A EP1657512B1 EP 1657512 B1 EP1657512 B1 EP 1657512B1 EP 04026647 A EP04026647 A EP 04026647A EP 04026647 A EP04026647 A EP 04026647A EP 1657512 B1 EP1657512 B1 EP 1657512B1
Authority
EP
European Patent Office
Prior art keywords
flat tubes
heat exchanger
exchanger according
housing
cross
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 - Lifetime
Application number
EP04026647A
Other languages
German (de)
English (en)
Other versions
EP1657512A1 (fr
EP1657512B2 (fr
Inventor
Viktor Dipl.-Ing. Brost (Fh)
Thomas Dipl.-Ing. Eckert
Denis Dipl.-Ing. Bazika (FH)
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
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Application filed by Modine Manufacturing Co filed Critical Modine Manufacturing Co
Priority to ES04026647T priority Critical patent/ES2285337T5/es
Priority to EP04026647A priority patent/EP1657512B2/fr
Priority to DE502004003357T priority patent/DE502004003357D1/de
Priority to US11/272,204 priority patent/US7631688B2/en
Publication of EP1657512A1 publication Critical patent/EP1657512A1/fr
Application granted granted Critical
Publication of EP1657512B1 publication Critical patent/EP1657512B1/fr
Publication of EP1657512B2 publication Critical patent/EP1657512B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—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
    • 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
    • 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
    • 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
    • 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
    • F28F2250/102—Particular pattern of flow of the heat exchange media with change of flow direction

Definitions

  • the invention relates to a heat exchanger, comprising flat and narrow sides having flat tubes, which are arranged to form channels to each other, in which, for example, a gas, such as exhaust gas or charge air, flows through the flat tubes and thereby, by means of coolant, through the channels between the flat tubes flows, is cooled and having a housing in which a stack of flat tubes is arranged.
  • a gas such as exhaust gas or charge air
  • FIG. 10 was appended as FIG. 1 to this application and provided with the reference "state of the art".
  • the flat tubes 3 'in their broad sides 33' are not deformed there.
  • the channels 10 ' have been formed there by means of inserts.
  • the object of the present invention is to further simplify the heat exchanger in terms of its construction, wherein the heat exchanger can be formed either with or without a bypass.
  • the solution according to the invention is carried out in a heat exchanger according to the preamble with the characterizing features of patent claim 1.
  • the housing is formed as an open profile with two legs that encompass only a portion of the circumference of the stack of flat tubes, the included portion including about three sides of the circumference but at least more than 50% to about 90% of the overall circumference.
  • the flat tubes are kept at a distance to form the channels.
  • the channels are closed to the outside, to the side not enclosed by the housing.
  • the flat tubes preferably have a continuous cross-sectional widening in the longitudinal direction.
  • the flat tubes can be inserted or mounted much easier in such a housing.
  • a bypass may or may not be provided in the part of the circumference of the stack of flat tubes not enclosed by the housing. It is also possible that the part not covered can be covered by a separate cap in another application. Preferably, however, this part is designed without any cover.
  • the legs preferably extend in the direction of the broad sides of the flat tubes and are connected to the broad sides of the outer flat tubes of the stack.
  • the legs extend in the direction of the narrow sides of the flat tubes, in which case the connection is made on the narrow side of a flat tube.
  • the flat tubes have a cross-sectional enlargement extending in the longitudinal direction thereof, on which the legs are preferably connected to the broad sides of the flat tubes.
  • the cross-sectional widening can be provided in one or preferably in both broad sides of the flat tubes. It extends like a strip over the entire length of the flat tubes.
  • the legs of the housing have a connecting edge, which is preferably formed offset and preferably takes over the connection with the cross-sectional widening.
  • a channel for the coolant has also been formed between the housing and the broad side of the outer flat tube.
  • All flat tubes are formed in one piece or in two pieces and arranged one above the other, leaving gaps forming the channels, wherein the channels or the intermediate spaces are formed by the flat tubes preferably bearing against each other with their cross-sectional widening.
  • a soldering process for metallic connection is preferred.
  • one-piece flat tubes are provided, they are preferably designed as welded flat tubes, which are produced on known production lines of sheet metal strip.
  • a longitudinal seam can be arranged in one of the two narrow sides.
  • the cross-sectional widening is carried out in the course of the flat tube production described.
  • two identical or two different deformed plates may be present, the channels being formed by the deformation of the plates.
  • the flat tubes preferably have an inner insert.
  • the inner liner is a corrugated sheet whose corrugations preferably form discrete flow passages for the gas.
  • the bypass mentioned above can be formed within the flat tubes. This has the not insignificant advantage that at least the adjacent to the bypass flow passage of the inner insert is not substantially traversed by the gas, whereby the heat transfer is suppressed.
  • the exhaust gas flowing through the bypass should not be cooled substantially.
  • FIG. 23 shows flat tubes which have a cross-sectional widening only at one broad side.
  • the embodiments shown in the figures relate to cooled by the internal combustion engine of the internal combustion engine exhaust gas heat exchanger for a motor vehicle, which are involved in not shown, known manner in an exhaust gas recirculation system, which, however, should not be limited thereto.
  • the flat tubes 3 are manufactured on known production lines of endless sheet-metal strip, wherein preferably in one of the narrow sides 32 a longitudinal weld seam 37 is provided.
  • FIGS. 9 and 10 Two different configurations of the flat tubes 3 are shown in FIGS. 9 and 10 shown.
  • the cross-sectional widening 14 has a relatively wide design and extends as far as the narrow side 32, in FIG. 9 the right-hand narrow side 32.
  • a part of this flat tube 3 was also shown in FIG. 8 as a perspective view.
  • the flat tubes 3 10 are shown in FIG. A cross-sectional enlargement 14, which does not extend up to the narrow side 32, with which performing as a continuous longitudinal stripe cross-section extension 14 is narrower than that of Fig. 9.
  • the cross-sectional widening 14 and from such flat tubes 3 to form the stack was indicated in Fig. 23 by only two flat tubes 3 .
  • the height of the channel 10 can of course be determined by the height of the step 14 (cross-sectional widening). In such cases, one can settle the connecting edge 20 of the housing 11 slightly more to obtain the desired width of the outer channel 10 .
  • the housing 11 was indicated there merely by a semicolon line.
  • applications may also be advantageous in which an outer channel 10 can be dispensed with, so that a shoulder of the connecting edge 20 is not necessary.
  • Figures 5 or 11 show that the housing 11 is formed as an open profile with two legs 12, 13 , which comprises only a part of the total circumference of the stack of flat tubes 3 , wherein the covered part is significantly more than half of the total circumference ,
  • the two legs 12, 13, extend approximately parallel to a base portion 15 of the housing 11.
  • Both legs 12, 13 preferably have the same length.
  • the channels 10 between the flat tubes 3 are closed towards the open side of the housing 11 in the illustrations shown by means of the cross-sectional widening 14.
  • flat tubes 3 were used, which are shown in FIG.
  • flat tubes 3 were used, which are shown in FIG. 9, the dimension of the cross-sectional widening 14 being somewhat reduced in comparison thereto.
  • the housing 11 comprises approximately three sides of the stack of flat tubes 3, namely the one side formed from the narrow sides 32 and the two sides formed by the broad sides 33 .
  • the other side formed from the narrow sides 32 remains without a further cover.
  • the broad sides 33 in Fig. 5 are not complete but only predominantly of the two legs 12, 13 of the Housing 11 includes.
  • the two legs 12 and 13 have a remote connection edge 20. This is used for connection to the cross-sectional widening 14 of the broad side 33 of the outer flat tubes 3 but also for connection in the region of the flat tube ends 35.
  • the ends 35 of the flat tubes 3 are reshaped to bring their broad sides 33 in this area completely to the plant.
  • a tube plate, in whose openings open the tube ends, is not present in the embodiments shown.
  • the drawings show that the degree of deformation of the flat tube ends 35 is quite low, so that in this respect no special requirements for the material must be made.
  • the size of the deformation corresponds to the height of the cross-sectional widening 14, which further facilitates the transformation of the flat tube ends 35 , because no substantial stretching of the material is necessary. It is important that the radii between the narrow sides 32 and the broad sides 33 of the flat tubes 3 in the region of the flat tube ends 35 are made quite small, because this assures the faultless soldering or the sealing in general.
  • FIGS. 15-22 relate to other embodiments in which the flat tubes are formed in two parts.
  • FIGS. 15 and 16 show a cross section through two different heat exchangers, the difference being that in FIG. 15 the flat tubes 3 are formed from two identical formed plates 1 and 2 and in FIG. 16 to form the flat tubes 3 in each case two differently shaped deformed plates 1, 2 are provided.
  • the two plates 1 and 2 are each assembled into a flat tube 3 on the connecting edge 40 on both sides.
  • the flat tubes 3 are stacked and the housing 11 is slipped over the stack.
  • the entry collection box 21 and the discharge collection box 22 are set at the opposite ends of the stack, as shown in Figs. 17-22.
  • FIGS. 17-22 relate to the two FIGS. 15 and 16 explained. In the example according to FIGS.
  • each receiving bead 41 may include the corresponding portion of a connecting edge 40 so that there a dense metallic connection, in particular a solder joint is possible. Namely, after the heat exchanger has been mounted as described, it is placed in a soldering oven to perform all the connections in one operation.
  • Wave-shaped inner inserts 5 with preferably discrete flow passages 25 for the exhaust gas have been inserted in the flat tubes 3 of all exemplary embodiments.
  • the inner inserts 5 extend in the longitudinal direction of the flat tubes 3 approximately over their entire length. In the transverse direction, a usually smaller part of the Overall cross-section of the flat tubes 3 to create an exhaust bypass 4 remain free. This is, if it is to be provided, always in the region of the cross-sectional widening 14 of the flat tubes 3.
  • This type of bypass training has the advantage that the bypass 4, in which as no cooling of the exhaust gases should be present, can be isolated very easily, by ensuring that the flow passage 25 of the inner insert 5 lying at the bypass 4 is not flowed through by the exhaust gas.
  • a cap 60 is provided, which was also fastened with its connecting edge to the cross-sectional widening 14 .
  • This configuration may possibly be preferred if the strip of the cross-sectional widening 14 is to lie still further in the direction of the flat tube center than was shown in FIG. 10.
  • the embodiments shown and described show heat exchanger with only one stack of flat tubes 3, consisting of three or four flat tubes 3. As already stated above, the number of flat tubes 3 per stack is adjusted appropriately. In addition, there are not shown embodiments, which have a plurality of stacks of flat tubes 3 .

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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 (16)

  1. Echangeur de chaleur, constitué de tubes plats (3) présentant des côtés larges et des côtés étroits (33, 32), qui sont disposés les uns par rapport aux autres en formant des canaux (10), dans lequel par exemple un gaz, comme un gaz d'échappement ou de l'air de suralimentation, s'écoule à travers les tubes plats (3), et est refroidi en l'occurrence au moyen d'un réfrigérant qui s'écoule à travers les canaux (10) entre les tubes plats (3), et qui présente un boîtier (11) dans lequel est disposé un empilement de tubes plats (3), caractérisé en ce que
    le boîtier (11) est réalisé sous forme de profilé ouvert avec deux branches (12, 13) présentant un bord de connexion (20), lequel enveloppe seulement une partie de la périphérie totale du ou des empilements de tubes plats (3), les tubes plats (3) étant maintenus espacés et les canaux (10) étant fermés vers le côté ouvert et le bord de connexion (20) étant connecté aux côtés larges (33) ou aux côtés étroits (32) des tubes plats extérieurs.
  2. Echangeur de chaleur selon la revendication 1, caractérisé en ce que le boîtier (11) présente vers la périphérie de l'empilement un espacement de tous les côtés de sorte qu'un canal (10) soit formé entre le côté intérieur du boîtier (11) et l'empilement.
  3. Echangeur de chaleur selon la revendication 1 ou 2, caractérisé en ce que les branches (12, 13) s'étendent dans la direction des côtés larges (33) des tubes plats (3) et sont connectées aux côtés larges (33) des tubes plats extérieurs (3).
  4. Echangeur de chaleur selon la revendication 1, 2 ou 3, caractérisé en ce que pour maintenir l'espacement, on prévoit un élargissement de la section transversale (14) s'étendant dans la direction longitudinale des tubes plats (3), au niveau duquel les branches (12, 13) sont de préférence connectées aux côtés larges (33) des tubes plats (3).
  5. Echangeur de chaleur selon la revendication 1 ou 4, caractérisé en ce que l'élargissement de section transversale (14) est prévu dans un ou de préférence dans les deux côtés larges (33) des tubes plats (3) et s'étend en bande sur toute la longueur des tubes plats (3).
  6. Echangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce que le bord de connexion (20) est réalisé de préférence en retrait et assure la connexion à l'élargissement de section transversale (14).
  7. Echangeur de chaleur selon l'une quelconque des revendications 1 à 6, caractérisé en ce que tous les tubes plats (3) sont réalisés d'une seule pièce ou en deux parties et sont disposés les uns sur les autres en respectant les espaces intermédiaires formant les canaux (10), les canaux (10) ou les espaces intermédiaires étant formés en appliquant de préférence les tubes plats (3) avec leurs élargissements de section transversale (14) les uns contre les autres.
  8. Echangeur de chaleur selon la revendication 7, caractérisé en ce que dans le cas de tubes plats (3) réalisés en deux parties, deux plaques déformées identiques ou différentes (1, 2) sont prévues, les canaux (10) étant formés par la déformation des plaques (1, 2).
  9. Echangeur de chaleur selon la revendication 7, caractérisé en ce que les tubes plats (3) fabriqués d'une seule pièce sont de préférence des tubes plats (3) soudés, qui présentent par exemple dans l'un des deux côtés étroits (32) un joint de soudure (37), l'élargissement de section transversale (14) étant réalisé au cours de la fabrication des tubes plats à partir d'une bande de tôle.
  10. Echangeur de chaleur, notamment selon les revendications 1 et 8, caractérisé en ce que, dans le bord de connexion (20) du boîtier (11), sont prévues des moulures de réception (41) pour recevoir la portion correspondante de l'autre bord de connexion (40) des tubes plats (3) en deux parties.
  11. Echangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une caisse collectrice d'entrée et une caisse collectrice de sortie (21, 22) sont prévues pour le gaz.
  12. Echangeur de chaleur, notamment selon les revendications 1, 8, 10 et 11, caractérisé en ce que deux côtés du bord de connexion des caisses collectrices (21, 22) sont également munis de moulures de réception (41).
  13. Echangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce que les tubes plats (3) présentent un insert intérieur (5).
  14. Echangeur de chaleur selon la revendication 13, caractérisé en ce que l'insert intérieur (5) est une tôle ondulée, dont les ondulations forment des passages d'écoulement discrets (25) pour le gaz.
  15. Echangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une dérivation (4) peut être formée à l'intérieur des tubes plats (3) par l'insert intérieur installé (5) et par une tôle de séparation dans les caisses collectrice d'entrée ou de sortie (21, 22).
  16. Echangeur de chaleur selon la revendication 14 et 15, caractérisé en ce qu'au moins le passage d'écoulement (25) de l'insert intérieur (5) adjacent à la dérivation (4) n'est pas sensiblement parcouru par le gaz, de sorte que le transfert thermique vers la dérivation (4) soit supprimé.
EP04026647A 2004-11-10 2004-11-10 Echangeur de chaleur avec un profilé ouvert en tant que boîtier Expired - Lifetime EP1657512B2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES04026647T ES2285337T5 (es) 2004-11-10 2004-11-10 Intercambiador de calor con perfil abierto como alojamiento.
EP04026647A EP1657512B2 (fr) 2004-11-10 2004-11-10 Echangeur de chaleur avec un profilé ouvert en tant que boîtier
DE502004003357T DE502004003357D1 (de) 2004-11-10 2004-11-10 Wärmetauscher mit offenem Profil als Gehäuse
US11/272,204 US7631688B2 (en) 2004-11-10 2005-11-10 Flat tube heat exchanger with housing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04026647A EP1657512B2 (fr) 2004-11-10 2004-11-10 Echangeur de chaleur avec un profilé ouvert en tant que boîtier

Publications (3)

Publication Number Publication Date
EP1657512A1 EP1657512A1 (fr) 2006-05-17
EP1657512B1 true EP1657512B1 (fr) 2007-03-28
EP1657512B2 EP1657512B2 (fr) 2010-06-16

Family

ID=34927312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04026647A Expired - Lifetime EP1657512B2 (fr) 2004-11-10 2004-11-10 Echangeur de chaleur avec un profilé ouvert en tant que boîtier

Country Status (4)

Country Link
US (1) US7631688B2 (fr)
EP (1) EP1657512B2 (fr)
DE (1) DE502004003357D1 (fr)
ES (1) ES2285337T5 (fr)

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Also Published As

Publication number Publication date
ES2285337T5 (es) 2010-10-04
EP1657512A1 (fr) 2006-05-17
US20060096747A1 (en) 2006-05-11
US7631688B2 (en) 2009-12-15
EP1657512B2 (fr) 2010-06-16
DE502004003357D1 (de) 2007-05-10
ES2285337T3 (es) 2007-11-16

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