EP1626238B1 - Echangeur de chaleur avec tubes plats - Google Patents

Echangeur de chaleur avec tubes plats Download PDF

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Publication number
EP1626238B1
EP1626238B1 EP04019339A EP04019339A EP1626238B1 EP 1626238 B1 EP1626238 B1 EP 1626238B1 EP 04019339 A EP04019339 A EP 04019339A EP 04019339 A EP04019339 A EP 04019339A EP 1626238 B1 EP1626238 B1 EP 1626238B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
flat tubes
exchanger according
bypass
area
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
EP04019339A
Other languages
German (de)
English (en)
Other versions
EP1626238A1 (fr
Inventor
Viktor Dipl.-Ing. Brost
Christoph Dipl.-Ing. Ruf
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
Priority to ES04019339T priority Critical patent/ES2279264T3/es
Priority to EP04019339A priority patent/EP1626238B1/fr
Priority to DE502004002379T priority patent/DE502004002379D1/de
Priority to US11/201,783 priority patent/US7243707B2/en
Publication of EP1626238A1 publication Critical patent/EP1626238A1/fr
Application granted granted Critical
Publication of EP1626238B1 publication Critical patent/EP1626238B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • 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
    • F02M26/23—Layout, e.g. schematics
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • F02M26/26—Layout, e.g. schematics with coolers having bypasses characterised by details of the bypass valve
    • 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
    • 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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F02M26/56—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
    • F02M26/57—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves using electronic means, e.g. electromagnetic valves
    • 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
    • F28D9/0043—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 plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • 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
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0082—Charged air coolers
    • 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
    • F28F2250/06—Derivation channels, e.g. bypass
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/092—Heat exchange with valve or movable deflector for heat exchange fluid flow
    • Y10S165/109—Heat exchange with valve or movable deflector for heat exchange fluid flow with by-pass of heat exchanger or heat exchanger section
    • Y10S165/11—Bypass within or surrounds heat exchanger

Definitions

  • the invention relates to a heat exchanger, consisting of 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 cooled by means of coolant flowing through the channels between the flat tubes and having a bypass through which the gas can flow uncooled.
  • a gas such as exhaust gas or charge air
  • a heat exchanger of this type has been described in the hitherto unpublished German application DE 103 28 638 and in the European application with the application number EP 4009615.8.
  • Such heat exchangers are extremely compact and have very good functional properties.
  • these heat exchangers are in great demand as exhaust gas heat exchangers, because to reduce emissions in motor vehicles, the path of exhaust gas recirculation increasingly stepped on.
  • the recirculated exhaust gas must be cooled in order to achieve a high efficiency in the recirculation, in particular in order to realize better filling levels.
  • it is about the overall system "motor vehicle with internal combustion engine” and an overall significantly improved energy balance. Therefore, many years ago, all operating phases in the motor vehicle were analyzed and measures taken to meet the changing load cases.
  • One of these measures is to bypass the exhaust gas heat exchanger by means of bypasses in phases in which the cooling of the exhaust gas would be counterproductive.
  • Such operating phases are, in particular, the starting phases of the motor vehicle which require a great deal of fuel, in which the heat energy of the exhaust gases, for example, is used directly for rapid warming up of the engine to its optimum operating temperature.
  • To circumvent the exhaust gas heat exchanger solutions are usually provided, as described for example in the European patent applications / patents EP 916 837 and EP 987 427.
  • a valve is arranged before the entry of the exhaust gases into the exhaust gas heat exchanger, with which the exhaust gas stream, if necessary, through the exhaust gas heat exchanger or at the same past, directly into the return line, is passed.
  • the bypass is integrated in the valve there.
  • the object of the invention is to provide the heat exchanger with a bypass option (bypass), for example by means of exhaust or charge air, that the exemplary functional properties and compactness are maintained, and that it remains mainly production friendly.
  • the solution according to the invention is carried out in a heat exchanger according to the preamble with the characterizing features of claim 1.
  • At least some of the flat tubes of the heat exchanger have two regions, wherein at least one bypass is formed in the uncooled region and wherein the other region is the cooled region in which the channels are located between the flat tubes.
  • the heat exchanger can be made very compact despite the presence of a bypass. It can be provided a single bypass, which is preferably formed along an inner edge region of the flat tubes.
  • each flat tube preferably consists of two deformed plates, wherein the channels and the at least one bypass are formed by the deformation of the plates.
  • a enclosing housing is not required in this case.
  • the deformed plates have a circumferential formation, with each of which two adjacent plates are connected to each other, wherein within the circumferential formation in each case a channel for the coolant, preferably for liquid, is formed.
  • An inlet and an outlet header for, for example, exhaust or charge air is present. These are preferably arranged at opposite ends of the flat tubes.
  • the flat tubes have according to a particular aspect only in their cooled area an indoor use.
  • the inner insert is a corrugated sheet whose corrugations preferably form discrete flow passages for example for exhaust gas or charge air.
  • the inner insert is soldered to the flat tube on the wall.
  • the separation between the bypass and the area in which the heat exchange between exhaust gas / charge air and coolant takes place takes place through the inserted inner insert and through a separating plate, which is arranged in the inlet or outlet collecting box.
  • Each of the deformed plates is provided with an already mentioned circumferential formation, as has already been shown and described in principle in EP 992 756 B1, which is expressly referred to because of the lack of detail here.
  • European Patent Application No. 03 007 724.2 where certain features of the diffuser are shown and described.
  • Each two deformed plates are assembled into a flat tube and the flat tubes are assembled into a stack.
  • two deformed plates come together with their circumferential shape and include a channel which constitutes a flow channel for a preferably liquid coolant.
  • This construction is described in detail in the mentioned European patent.
  • the entire exhaust gas heat exchanger for example, can still be connected or produced in a single soldering operation.
  • FIG. 1 perspective, sectional view of a portion of the heat exchanger; Fig. 2 horizontal section through the heat exchanger with manifolds; FIG. 3 shows an alternative view to FIG. 2 with flap valve in the collecting box; FIG. Fig. 4 vertical section according to IV - IV of Fig. 3; Fig.
  • FIG. 5 similar to Figure 4, without cover plates and with nubs in the channels.
  • Fig. 6 view on the front side of the heat exchanger without collecting box; 7 perspective view of two flat tubes with separating plate; FIG. 8, like FIG. 7, sectional plate cut; FIG. Fig. 9 alternative solution with housing, vertical section; Fig.10 alternative solution with housing, perspective view without collecting boxes;
  • the exemplary embodiments shown in the figures relate to exhaust gas heat exchangers for a motor vehicle which have been cooled by means of cooling liquid of the internal combustion engine and which are integrated into an exhaust gas recirculation system in a known manner (not shown).
  • Fig. 1 is a perspective, partially sectioned view of a portion of the heat exchanger according to the invention is shown.
  • only two flat tubes 3 are stacked on each other and each provided with a collecting box 20, 22 at the end faces of the heat exchanger.
  • the flat tubes 3 are composed of two identically deformed plates 1, 2 .
  • One of the plates 1 or 2 is rotated by 180 ° about the longitudinal axis. At the edge 9 along the longitudinal axis of the plates 1, 2 , they are soldered later.
  • the deformation of the plates 1, 2 comprises a circumferential formation 80 .
  • the refrigerated region 11 has been delimited from the uncooled region 12 by the inner inserts 5 .
  • the distribution of the exhaust gas to the cooled area 11 and / or the uncooled area 12 (bypass 4 ) is achieved outside of the heat exchanger by a switching valve 25 .
  • a separating plate 6 is integrated in the collecting box 20 .
  • At least this one flow passage 20 should be designed to be discreet so that the heat transfer from the cooled area 11 to the uncooled area 12 (bypass 4 ) is suppressed by the air contained therein.
  • the remaining flow passages 20 formed by the inner insert 5 do not necessarily have to be closed laterally, that is to say be discrete.
  • the curved wall 14 of the partition plate 6 has in the collecting box 20 and is soldered to the separation of the two connecting pieces 21a and 21b with the collecting box 20th
  • FIG. 2 shows a horizontal section running through the heat exchanger of FIG. 1 with header boxes 20 and 22 , which passes through a coolant channel 10 , exactly in the plane of the solder joint between two plates 1 and 2 adjoining one another with their formations 80 .
  • This channel 10 is enclosed all around by the circumferential formation 80 . Therefore, no tube bottom 90 and no enclosing housing for the heat exchanger is needed.
  • the coolant is passed via the ports 30 and 32 through the channels 10 . It flows preferably in countercurrent to the exhaust gas to be cooled. Also, the positioning of the terminals 30, 32 is to be understood merely as an example.
  • the positioning shown has the advantage that the flow of the exhaust gases is not hindered and that the inner liner 5 does not have to be cut out because the ports 30, 32 are outside the flow path of the exhaust gases.
  • the cooled region 11 is uniformly flowed through by the coolant.
  • the separating plate 6 with foot 13 and the curved wall 14 can be seen.
  • the advantage of this heat exchanger is that it can be produced after the assembly of all parts in a soldering process. For this, however, the switching valve 25 must be mounted outside of the heat exchanger, which is why the exhaust port 21 of the exhaust gas into two outlet ports 21a and 21b for both branches, cooled and uncooled exhaust gas is divided.
  • Fig. 4 is a vertical section according to IV-IV of Fig. 3 can be seen.
  • a cover plate 7 with circumferential formation 81 and a bottom plate 8 are mounted with circumferential formation 81 .
  • the deck - 7 and the bottom plate 8 are formed of slightly thicker sheets to increase the stability of the heat exchanger.
  • the circulating formation 81 is made wider on the longitudinal side 85 of the heat exchanger on which the bypass 4 is located in order to prevent coolant from flowing around the bypass 4 .
  • the cover 7 and the bottom plate 8 are in the uncooled area 12 directly on the flat tubes 3 .
  • Fig. 5 also shows a section in the transverse direction of the heat exchanger, but in a modified embodiment.
  • the cover 7 and bottom plate 8 were omitted.
  • There are characteristics 26 are provided. They are located in all plates 1, 2, since these are identical plates 1, 2 .
  • the characteristics 26 serve on the one hand to stabilize the channels 10 and on the other hand to increase the turbulence of the coolant.
  • the shapes 26 may be configured in the shape of a knob or a bead. Their number is also to be adapted to the size and stability requirements of the heat exchanger. In the case of the alternative solution proposal of a heat exchanger shown in FIGS.
  • FIG. 6 shows a front view of the end face of the heat exchanger without a separating plate 6 and without collecting boxes 20, 22 .
  • the last discrete flow channel 20 , wave crest 16 of the inner insert 5 in front of the bypass 4 is still open here, since no separating plate 6 is placed yet.
  • FIGS. 7 and 8 each show a perspective view of the end face of the heat exchanger, but without collecting boxes 20, 22 .
  • the separating plate 6 By attaching the separating plate 6 with its projecting foot 13 on the last crest 16, this is at least almost sealed tightly for the exhaust, so that there is a thermal separation between the uncooled area 12 and the cooled area 11 . To illustrate this, the separating plate 6 is shown cut in Fig.8.
  • three stacked flat tubes 3 are provided with a housing 101 and with channels 10 for the coolant therebetween.
  • a corrugated inner insert 5 has been inserted into each flat tube 3 again.
  • the inner insert 5 extends only over the cooled region 11 of the flat tube 3.
  • the housing 101 is deformed here, so that it lies directly on the flat tubes 3 rests.
  • paragraph 106 is formed.
  • inserts 102 or similar devices are necessary, which, arranged between the flat tubes 3 , prevent the coolant from flowing around the individual bypasses 4 .
  • the housing 101 could also be formed in two parts. It would then have a connection seam, which allows a connection, preferably by means of soldering.
  • connection seam On the front sides of the heat exchanger tube sheets 90 and manifolds 20, 22 are placed for the exhaust. Both details are not shown, but necessary for the heat exchanger to work. Tube sheets 90 are known to the circumference of the flat tubes 3 corresponding openings, with the edge of the ends of the flat tubes 3 are tightly connected. Thus, the flow of gas from the collecting box 20 or 22 is secured in the Fiachrohre 3 and at the same time ensures the separation to the channels 10 for the coolant.
  • the circumference of the tube sheets 90 is connected to the housing 101 . It is a partition plate 6 in one of the collecting tanks 20, 22 required in the collecting box 20, 22 to separate the cooled from the uncooled exhaust gas. Again, both variants can be used, either with integrated in the collection box 20, 22 switching valve 25 or with two outlet 21a and 21b. The separating plate 6 must then be designed accordingly.
  • Fig. 10 is a perspective view is shown.
  • 105 designates one of the inlet or outlet ports for the coolant.
  • the inlet and outlet nozzles 105 for the coolant may be attached laterally as shown, or also above and / or below the housing 101 .
  • forms 26, which space the flat tubes 3 . Such characteristics 26 are shown in Fig. 5.
  • the forms 26 are preferably present in the cooled region 11 .
  • spacer strips similar to the inserts 102, between two flat tubes 3 and between the flat tube 3 and housing 101 are used.
  • a corrugated inner insert 5 is inserted here in each flat tube 3 in the cooled area 11 and in one of the manifolds 20, 22, a partition plate 6 is provided.
  • both variants can be used, either with integrated in the collection box 20, 22 switching valve 25 or with two outlet 21a and 21b.
  • the separating plate 6 must then be designed accordingly.
  • the embodiments shown and described show heat exchanger with only one stack of flat tubes 3, consisting of two or three 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 that have multiple stacks of flat tubes 3 . In such cases, it may be appropriate to form the bypass 4 in at least the majority of the flat tubes 3 of a single stack. It is then possible to increase the cross section of the bypass 4 in comparison with the embodiments shown.

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

Claims (16)

  1. Echangeur de chaleur, constitué de tubes plats (3), qui sont disposés les uns par rapport aux autres en formant des canaux (10), dans lequel par exemple un gaz, tel que du gaz d'échappement ou de l'air de suralimentation, s'écoule à travers les tubes plats (3) et est refroidi par du réfrigérant qui s'écoule à travers les canaux (10) entre les tubes plats (3) et qui présente une dérivation (4) à travers laquelle le gaz peut s'écouler essentiellement sans refroidissement,
    caractérisé en ce que
    au moins quelques-uns des tubes plats (3) présentent une région refroidie (11) et une région non refroidie (12), l'au moins une dérivation (4) étant formée dans la région non refroidie (12) et au moins un canal (10) se trouvant dans la région refroidie (11) entre deux tubes plats respectifs (3).
  2. Echangeur de chaleur selon la revendication 1, caractérisé en ce que tous les tubes plats (3) sont réalisés de préférence d'une seule pièce et sont disposés les uns au-dessus des autres, en conservant les espaces intermédiaires formant les canaux (10) et sont entourés par un boîtier (101) renfermant les tubes plats (3).
  3. Echangeur de chaleur selon la revendication 1, caractérisé en ce que chaque tube plat (3) est formé de deux plaques façonnées (1, 2), la mise en forme des plaques (1, 2) donnant lieu aux canaux (10) et à l'au moins une dérivation (4), aucun boîtier (101) renfermant les tubes plats (3) n'étant prévu.
  4. Echangeur de chaleur selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on prévoit une caisse collectrice d'entrée et une caisse collectrice de sortie (20, 22) pour le gaz.
  5. Echangeur de chaleur selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les tubes plats (3) présentent dans la région refroidie (11) un insert intérieur (5).
  6. Echangeur de chaleur selon la revendication 5, caractérisé en ce que l'insert intérieur (5) est une tôle ondulée dont les ondulations forment de préférence des passages d'écoulement discrets (16) pour le gaz.
  7. Echangeur de chaleur selon l'une quelconque des revendications précédentes 5 ou 6, caractérisé en ce que la séparation entre la dérivation (4) et la région refroidie (11) est réalisée par l'insert intérieur introduit (5) et par une tôle de séparation (6), qui est disposée dans la caisse collectrice d'entrée, respectivement dans la caisse collectrice de sortie (20, 22).
  8. Echangeur de chaleur selon l'une quelconque des revendications précédentes 5 à 7, caractérisé en ce qu'au moins le passage d'écoulement (20, 16) de l'insert intérieur (5), adjacent à la dérivation (4) n'est essentiellement pas parcouru par le gaz, et supprime ainsi le transfert thermique entre les régions (11) et (12).
  9. Echangeur de chaleur selon au moins les revendications 1 et 3, caractérisé en ce que les plaques façonnées (1, 2) présentent une formation périphérique (80) avec laquelle deux plaques adjacentes (1, 2) sont à chaque fois connectées l'une à l'autre, un canal (10) pour le réfrigérant, de préférence pour du liquide, étant à chaque fois réalisé à l'intérieur de la formation périphérique (80).
  10. Echangeur de chaleur selon la revendication 9, caractérisé en ce que la formation périphérique (80) est plus large au niveau du côté longitudinal (85) qui contient la région non refroidie (11), la dérivation (4), qu'au niveau des trois côtés restants de l'échangeur de chaleur.
  11. Echangeur de chaleur selon la revendication 2, caractérisé en ce que les tubes plats (3) présentent en certains endroits des impressions (26) pour espacer les tubes plats (3).
  12. Echangeur de chaleur selon la revendication 3, caractérisé en ce que les plaques (1, 2) présentent des impressions (26) pour renforcer les canaux (10).
  13. Echangeur de chaleur selon les revendications 1, 2 et 11, caractérisé en ce que la région refroidie (11) est séparée de la région présentant la dérivation (4) par le fait que les canaux (10) présentent des parties d'insertion (102) s'étendant entre les tubes plats (3).
  14. Echangeur de chaleur selon les revendications 1, 2 et 11, caractérisé en ce que la région refroidie (11) est séparée de la région (12) présentant la dérivation (4) par le fait que les tubes plats (3) présentent à cet endroit une formation (110) s'étendant sur toute la longueur des tubes plats (3).
  15. Echangeur de chaleur selon les revendications 1, 2, 11, 13 et 14, caractérisé en ce qu'un fond tubulaire (90) au niveau de la caisse collectrice de sortie et d'entrée (20, 22) du gaz ferme hermétiquement les canaux de réfrigérant (10).
  16. Echangeur de chaleur selon la revendication 7, caractérisé en ce que la tôle de séparation (6) fait partie intégrante de la caisse collectrice.
EP04019339A 2004-08-14 2004-08-14 Echangeur de chaleur avec tubes plats Expired - Fee Related EP1626238B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES04019339T ES2279264T3 (es) 2004-08-14 2004-08-14 Intercambiador de calor constituido por tubos planos.
EP04019339A EP1626238B1 (fr) 2004-08-14 2004-08-14 Echangeur de chaleur avec tubes plats
DE502004002379T DE502004002379D1 (de) 2004-08-14 2004-08-14 Wärmetauscher, bestehend aus Flachrohren
US11/201,783 US7243707B2 (en) 2004-08-14 2005-08-11 Flat tube exhaust heat exchanger with bypass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04019339A EP1626238B1 (fr) 2004-08-14 2004-08-14 Echangeur de chaleur avec tubes plats

Publications (2)

Publication Number Publication Date
EP1626238A1 EP1626238A1 (fr) 2006-02-15
EP1626238B1 true EP1626238B1 (fr) 2006-12-20

Family

ID=34926173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04019339A Expired - Fee Related EP1626238B1 (fr) 2004-08-14 2004-08-14 Echangeur de chaleur avec tubes plats

Country Status (4)

Country Link
US (1) US7243707B2 (fr)
EP (1) EP1626238B1 (fr)
DE (1) DE502004002379D1 (fr)
ES (1) ES2279264T3 (fr)

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Also Published As

Publication number Publication date
US7243707B2 (en) 2007-07-17
DE502004002379D1 (de) 2007-02-01
US20060032613A1 (en) 2006-02-16
EP1626238A1 (fr) 2006-02-15
ES2279264T3 (es) 2007-08-16

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