EP3232149B1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
EP3232149B1
EP3232149B1 EP16204416.8A EP16204416A EP3232149B1 EP 3232149 B1 EP3232149 B1 EP 3232149B1 EP 16204416 A EP16204416 A EP 16204416A EP 3232149 B1 EP3232149 B1 EP 3232149B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
covers
groove
tube
lug
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.)
Not-in-force
Application number
EP16204416.8A
Other languages
German (de)
English (en)
Other versions
EP3232149A1 (fr
Inventor
Georg Baumgartner
Chi-Duc Nguyen
Gerhard Zsiga
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.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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 Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP3232149A1 publication Critical patent/EP3232149A1/fr
Application granted granted Critical
Publication of EP3232149B1 publication Critical patent/EP3232149B1/fr
Not-in-force 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
    • 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
    • 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
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • F28F3/027—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing
    • F28F2275/045—Fastening; Joining by brazing with particular processing steps, e.g. by allowing displacement of parts during brazing or by using a reservoir for storing brazing material

Definitions

  • the present invention relates to a heat exchanger with a housing and with a heat exchanger block arranged therein according to the preamble of claim 1.
  • the invention also relates to a method for producing such a heat exchanger.
  • a heat exchanger with a soldered, consisting of flat tubes and ribs block wherein the flat tubes are flowed through by a first medium and communicate with at least one collecting tank and the ribs are overflowed by a second medium.
  • the ribs themselves are substantially flat and arranged parallel to each other and moreover have openings with contact surfaces, wherein the flat tubes are received in the openings and soldered in the region of the contact surfaces.
  • a heat exchanger with a heat exchanger network consisting of tubes and fins is known, as well as with at least one collection box formed from the sheet metal blank, which has a bottom section with openings into which the tubes open.
  • This bottom portion has on the one hand a bottom longitudinal edge with recess and on the other hand passes into a curved wall section, which in a longitudinal wall edge with tabs ends.
  • the wall longitudinal edge is returned substantially perpendicular to the bottom longitudinal edge and inserted with the tabs in the recesses.
  • a turbo-charged internal combustion engine by which weight, space and fuel consumption advantages can be achieved.
  • the fresh air is brought to a higher pressure and temperature level with the help of a turbo-compressor.
  • the possibly compressed fresh air is mixed with a certain amount of recirculated exhaust gas, thereby reducing the oxygen content and the temperature in the combustion chamber, whereby lower NO x emissions can be achieved.
  • Another way to reduce the NO x emissions is to cool both the fresh air after compression, as well as the recirculated exhaust gas by means of a heat exchanger.
  • the heat taken from the exhaust gas or the fresh air can be used for the faster warming up of a vehicle cabin and / or a faster warming up of the internal combustion engine or a transmission after the cold start, whereby consumption and emission advantages can likewise be achieved.
  • the heat exchangers used for cooling are standard in the so-called Rohrbündelbauweise executed.
  • the tube bundles consist of stacked, gas-conducting flat tubes with internal corrugated fins and lying between the tubes coolant side turbulence inserts, the tube bundles complete by default with one tube to the outside.
  • the coolant channels located between the tubes are sealed watertight on the outside via two soldered to the flat tubes covers and the front side soldered to the flat tubes tubesheets.
  • the housing is completed by top and bottom soldered side panels, which do not have to fulfill any tightness function.
  • thermo change fatigue strength determines significantly the suitability of a heat exchanger for the above applications. Due to the anticipated further increase in boost pressures and exhaust gas recirculation rates in the future, the improvement of the thermal shock fatigue resistance is becoming increasingly important.
  • the present invention therefore deals with the problem of providing a heat exchanger of the generic type an improved or at least one alternative embodiment, which is characterized in particular by a simplified production.
  • the present invention is based on the general idea to provide specific integral with these mechanical fixing elements on individual components of a heat exchanger, which allow a simple mechanical prefixing of the heat exchanger, so that this in a subsequent welding / soldering process no longer expensive and complicated to handle Soldering / welding frame must be kept.
  • the heat exchanger according to the invention has in a known manner a housing and a heat exchanger block arranged therein, which comprises a tube bundle with a plurality of flat tubes, which are held in the longitudinal end of complementary trained passages in tube sheets.
  • this housing now has two U-shaped side parts and two covers, wherein an axially projecting first nose is arranged on each side part in each case in the region of a corner, ie a total of four first lugs each side part, and wherein each cover in each case Corner is arranged in the axial direction projecting second nose, so a total of four second lugs per cover.
  • a rectangular and circumferential first groove is arranged, in which the covers and the side parts are each received on the front side.
  • Each side part and each cover is thus received with a first end face in a first groove of a first tube sheet and the opposite edge at the end face in the opposite first groove of the second tube sheet.
  • each passage opening is arranged, through each of which a first and a second lug are guided, these two lugs being bent and thereby mechanically fixing the respective side part and the respective cover to the associated tube plate.
  • Through each tube bottom reach through the four Through openings thus in each case four first lugs and four second lugs, which allows a mechanical prefixing of the housing and thus a mechanical prefixing of the heat exchanger with the heat exchanger block arranged in the housing, so that this then spent in this mechanically prefixed state in a soldering oven and soldered there or .
  • a subsequent welding process can be supplied without having to be laboriously and cumbersome to be installed in an associated soldering frame or welding frame before.
  • turbulence inserts are arranged between the flat tubes.
  • a turbulent flow between the individual flat tubes is achieved and thus achieved an improved heat transfer.
  • a turbulence insert can also be arranged between each side part and the respectively adjacent flat tube. This is particularly important for increasing the thermal shock fatigue strength of great importance, since in this case the respective outer flat tube is not only washed from one side with coolant, but from two sides. For this reason, the respective side part is arranged at a distance from the adjacent flat tube, so that there is no direct heat-transmitting contact between the outer flat tube and the side part.
  • corresponding turbulence inserts / corrugated ribs can also be arranged inside the flat tubes, as a result of which an increased heat transfer can also be achieved here.
  • At least one insertion bevel is expediently arranged on at least one nose.
  • Such chamfers facilitate the assembly of the Housing, that is, the heat exchanger by the insertion of the respective nose is simplified into the associated passage opening.
  • the noses received in each case in a passage opening are bent away from one another. In this way, a reliable fixation of a cover and an adjacent side part can be achieved on a tube sheet.
  • a peripheral, circumferential second groove is arranged on each outer side of each tube bottom following the edge, in which an edge of a diffuser or a deflecting tank is received.
  • the present invention is further based on the idea to provide a simple method for producing the heat exchanger described above, in which initially side parts and covers are so assembled with two tube sheets to form a housing that a respective end face or a respective edge of two side parts and two Covers engage in a circumferential first groove of a first tube plate and that a respective opposite end face or a respective opposite edge of two side parts and two covers engage in a circumferential first groove of an opposite second tube plate.
  • a corner-side passage opening of the respective tube sheet each engage a first nose of a side part and a second nose of a cover. Then the noses are bent over and the side parts, the covers and the tubesheets are mechanically fixed to each other.
  • a heat exchanger 1 has a housing 2 with a heat exchanger block 3 arranged therein.
  • the heat exchanger block 3 in this case has a tube bundle with a plurality of flat tubes 4, the longitudinal end side in complementary thereto trained passages 5 a tube plate 6, 7 are held.
  • the housing 2 now has two U-shaped side parts 8, 9 and two covers 10, 11. At each side part 8, 9 each projecting in the axial direction 13 a first nose 12 is arranged in each case in the region of a corner, while at each cover 10, 11 each in the region of a corner projecting in the axial direction 13 second nose 14 is arranged.
  • first groove 15 is arranged on an inner side of each tube plate 6, 7 a the peripheral edge of the tube bottom rectangular, circumferential first groove 15 is arranged, in which the covers 10, 11 and the side parts 8, 9 are each received with a front edge.
  • first groove 15 there is in each corner region of the first groove 15 there is in each case a passage opening 16 (cf. 4 and 5 ), through which in each case a first and a second lug 12, 14 is guided, wherein the lugs 12, 14 are bent and thereby fix the respective side part 8, 9 and the respective cover 10, 11 mechanically on the tube bottom 6, 7.
  • the heat exchanger 1 can be mechanically prefixed with regard to its housing 2 and with respect to the heat exchanger block 3 arranged therein, so that it is mechanically fixed in this case Prefixed state, a subsequent manufacturing step, for example.
  • a welding or soldering can be supplied without the heat exchanger 1 for this would first have to be clamped in an expensive welding frame or soldering frame.
  • so-called turbulence inserts 17 are preferably arranged between the flat tubes 4, whereby such turbulence inserts 17 can likewise be arranged within a respective flat tube 4. It is particularly advantageous beyond that, if between each side part 8, 9 and the next adjacent flat tubes 4 such a turbulence insert 17 is arranged, since in this case, the outer flat tube 4 is surrounded on both sides by coolant and thereby exposed to a lower temperature load, whereby the Thermo change fatigue strength can be increased.
  • the two lugs 14 on the cover 10, 11 are preferably an insertion bevel 18 (see. Fig. 3 ), which facilitate insertion of the respective lug 12, 14 into the associated passage opening 16 on the tubesheet 6, 7.
  • the two are in each case in a through opening 16 received in lugs 12, 14 bent away from each other, as example.
  • the Fig. 5 is shown, and thereby fix the associated cover 10, 11 and the associated side part 8, 9 on each associated tube sheet 6, 7th
  • a U-leg 19 of the respective side part 8, 9 has an angle of attack of less than 90 ° to a U-leg 19 connecting web 27, whereby between the U-leg 19 and the associated Cover 10, 11 results in a defined Lotspalt 20, which allows reliable soldering.
  • An inner side 21 of the respective side part 8, 9 is preferably solder-plated, whereby a connection of the adjacently arranged turbulence insert 17 is possible.
  • a rectangular and circumferential second groove 22 is arranged, in which an edge of a diffuser 23 or a Umlenktanks 24 received, in particular positively recorded and, for example, is soldered tightly.
  • positively received are, for example, the respective edge, that is, the front side of the covers 10, 11 and the side parts 8, 9 in the associated first groove 15 of the respectively associated tube sheet 6, 7th
  • a coolant inlet 25 and a coolant outlet 26 are arranged.
  • the coolant inlet 25 and the coolant outlet 26 are designated in the area of their respective sockets.
  • the heat exchanger 1 is produced as follows: First, the side parts 8, 9 and the covers 10, 11 are respectively fitted together with the two tube sheets 6, 7 to a housing 2, that a respective end face, that is, a respective edge, two Side parts 8, 9 and two covers 10, 11 engage in a circumferential first groove 15 of the first tube sheet 6 and the respective opposite end face or an opposite edge of two side parts 8, 9 and two covers 10, 11 in a circumferential first groove 15 of an opposite engage second tube bottom 7.
  • the mating is carried out such that in each case a corner-side passage opening 16 of the tube sheet 6, 7 each engage a first lug 12 of a side part 8, 9 and a second lug 14 of a cover 10, 11.

Landscapes

  • 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 (10)

  1. Échangeur de chaleur (1) avec un boîtier (2) et un bloc d'échangeur de chaleur (3) agencé à l'intérieur de celui-ci, qui présente un faisceau de tubes avec plusieurs tubes plats (4), qui sont retenus côté extrémité longitudinale dans des passages (5) réalisés de manière complémentaire à ceux-ci dans des fonds de tube (6, 7),
    caractérisé en ce
    - que le boîtier (2) présente deux parties latérales en forme de U (8, 9) ainsi que deux recouvrements (10, 11),
    - qu'un premier nez (12) en saillie dans la direction axiale (13) est agencé au niveau de chaque partie latérale (8, 9) respectivement dans la zone d'un coin,
    - qu'un deuxième nez (14) en saillie dans la direction axiale (13) est agencé au niveau de chaque recouvrement (10, 11) respectivement dans la zone d'un coin,
    - qu'une première rainure périphérique (15) est agencée au niveau d'un côté intérieur de chaque fond de tube (6, 7), dans lesquelles les recouvrements (10, 11) et les parties latérales (8, 9) sont reçus côté frontal respectivement avec un bord,
    - que respectivement une ouverture de passage (16) est agencée dans chaque zone de coin de la première rainure (15), par laquelle respectivement un premier et un deuxième nez (12, 14) est guidé, dans lequel les nez (12, 14) sont recourbés et fixent ainsi mécaniquement la partie latérale (8, 9) respective et le recouvrement (10, 11) respectif sur le fond de tube correspondant (6, 7).
  2. Échangeur de chaleur selon la revendication 1,
    caractérisé en ce
    que des inserts de turbulence (17) sont agencés entre les tubes plats (4).
  3. Échangeur de chaleur selon la revendication 1 ou 2,
    caractérisé en ce
    qu'un insert de turbulence (17) est agencé entre chaque partie latérale (8, 9) et le tube plat (4) respectivement adjacent.
  4. Échangeur de chaleur selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'au moins un chanfrein d'introduction (18) est agencé au niveau d'au moins un nez (12, 14).
  5. Échangeur de chaleur selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que les nez (12, 14) reçus respectivement dans une ouverture de passage (16) sont recourbés en s'éloignant l'un de l'autre.
  6. Échangeur de chaleur selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que respectivement un montant en U (19) de la partie latérale en forme de U (8, 9) présente un angle d'inclinaison α < 90° par rapport à une traverse (27) reliant les montants en U (19).
  7. Échangeur de chaleur selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'une deuxième rainure périphérique (22), dans laquelle un bord d'un diffuseur (23) ou d'un réservoir de renvoi (24) est reçu, est agencée au niveau de chaque côté extérieur de chaque fond de tube (6, 7).
  8. Échangeur de chaleur selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que les parties latérales (8, 9) et les recouvrements (10, 11) sont brasés dans la première rainure (15).
  9. Échangeur de chaleur selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'une entrée de réfrigérant (25) et une sortie de réfrigérant (26) sont agencées au niveau d'un des deux recouvrements (10, 11).
  10. Procédé de fabrication d'un échangeur de chaleur (1) selon l'une quelconque des revendications 1 à 9, dans lequel
    - des parties latérales (8, 9) et recouvrements (10, 11) sont respectivement assemblés par emboîtement avec deux fonds de tube (6, 7) en un boîtier (2) de telle sorte qu'un bord respectif de deux parties latérales (8, 9) et de deux recouvrements (10, 11) se mettent en prise avec une première rainure périphérique (15) d'un premier fond de tube (6) et qu'un bord opposé respectif de deux parties latérales (8, 9) et de deux recouvrements (10, 11) se mettent en prise avec une première rainure périphérique (15) d'un deuxième fond de tube opposé (7),
    - respectivement un premier nez (12) d'une partie latérale (8, 9) et un deuxième nez (14) d'un recouvrement (10, 11) se mettent en prise avec respectivement une ouverture de passage côté coin (16) de la première rainure (15),
    - les nez (12, 14) sont recourbés et ainsi les parties latérales (8, 9), les recouvrements (10, 11) et les fonds de tube (6, 7) sont fixés mécaniquement les uns aux autres,
    - les parties latérales (8, 9) fixées mécaniquement les unes aux autres, les recouvrements (10, 11), les fonds de tube (6, 7) ainsi que des tubes plats (4) reçus dans des passages (5) des fonds de tube (6, 7) et des inserts de turbulence (17) agencés entre les tubes plats (4) et les parties latérales (8, 9) sont amenés ensemble dans un four de brasage et y sont brasés.
EP16204416.8A 2016-02-10 2016-12-15 Échangeur de chaleur Not-in-force EP3232149B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016201954.6A DE102016201954A1 (de) 2016-02-10 2016-02-10 Wärmeübertrager

Publications (2)

Publication Number Publication Date
EP3232149A1 EP3232149A1 (fr) 2017-10-18
EP3232149B1 true EP3232149B1 (fr) 2018-06-20

Family

ID=57570309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16204416.8A Not-in-force EP3232149B1 (fr) 2016-02-10 2016-12-15 Échangeur de chaleur

Country Status (2)

Country Link
EP (1) EP3232149B1 (fr)
DE (1) DE102016201954A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019112194A1 (de) * 2019-05-09 2020-11-12 Mahle International Gmbh Wärmeübertrager

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Publication number Priority date Publication date Assignee Title
CN111854478A (zh) * 2019-04-30 2020-10-30 杭州三花研究院有限公司 一种换热器

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US5095882A (en) * 1990-05-29 1992-03-17 Paccar Inc. Cleanable air-to-air cooling system
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DE20005523U1 (de) * 2000-03-28 2001-08-16 Autokuehler Gmbh & Co Kg Wärmeaustauscher
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DE102005032812A1 (de) 2004-07-12 2006-02-02 Behr Gmbh & Co. Kg Wärmeübertrager, insbesondere für Kraftfahrzeuge
DE102005012761A1 (de) 2005-03-19 2006-09-21 Modine Manufacturing Co., Racine Wärmetauscher, bspw. Ladeluftkühler und Herstellungsverfahren
CN101688763B (zh) * 2007-04-11 2014-08-20 贝洱两合公司 热交换器
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EP2458312B1 (fr) * 2010-11-26 2018-07-18 MAHLE International GmbH Échangeur thermique pour moteur à combustion interne
GB2507495B (en) * 2012-10-30 2018-07-25 Denso Marston Ltd A heat exchanger assembly

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DE102019112194A1 (de) * 2019-05-09 2020-11-12 Mahle International Gmbh Wärmeübertrager

Also Published As

Publication number Publication date
DE102016201954A1 (de) 2017-08-10
EP3232149A1 (fr) 2017-10-18

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