EP3088834A1 - Fluide caloporteur - Google Patents

Fluide caloporteur Download PDF

Info

Publication number
EP3088834A1
EP3088834A1 EP16162358.2A EP16162358A EP3088834A1 EP 3088834 A1 EP3088834 A1 EP 3088834A1 EP 16162358 A EP16162358 A EP 16162358A EP 3088834 A1 EP3088834 A1 EP 3088834A1
Authority
EP
European Patent Office
Prior art keywords
flange
heat exchanger
diffuser
housing
screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16162358.2A
Other languages
German (de)
English (en)
Other versions
EP3088834B1 (fr
Inventor
Albrecht Siegel
Simon HUND
Pramod Barhate
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 EP3088834A1 publication Critical patent/EP3088834A1/fr
Application granted granted Critical
Publication of EP3088834B1 publication Critical patent/EP3088834B1/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
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • F28F9/12—Arrangements for sealing elements into header boxes or end plates by dismountable joints by flange-type connections
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/08—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes pressed; stamped; deep-drawn
    • 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
    • F28F2275/20—Fastening; Joining with threaded elements

Definitions

  • the present invention relates to a heat exchanger, in particular an exhaust gas heat exchanger, according to the preamble of claim 1.
  • the invention also relates to a method for producing a diffuser for such a heat exchanger.
  • the tube sheets, the tubes and the housing are formed from heat-resistant, austenitic steel sheets, wherein the tubes are welded into the tube sheets punched from a sheet metal and the tubesheets in the housing.
  • the tubesheets themselves are formed as deep-drawn parts, each having a circumferential, the ends of the tubes of the tubesheet outwardly projecting wall, which is welded to the housing and to each of which a diffuser connects. This should make it possible to produce the heat exchanger advantageous welding technology.
  • Another heat exchanger with a diffuser for introducing a medium into flat heat exchanger tubes.
  • the diffuser itself has a wall which extends along the ends of a stack of flat heat exchanger tubes and the inside of which is sealed to the ends by means of soldering.
  • a tight solder joint between the wall and the ends of the heat exchanger tubes and a fixation of the stack is to be created thereby, that the wall around the entire circumference Extending the periphery of the stack and having recesses or slots corresponding to grooves in the periphery of the stack.
  • diffusers on known heat exchangers have hitherto been produced either in one piece from cast steel, die-cast aluminum or plastic injection molding or in several parts from one or more deep-drawn parts with an attached flange.
  • a flange is joined with a heat exchanger block, for example, soldered.
  • the opposite flange for upstream or downstream components, ie, the heat exchanger block facing away from the flange of the diffuser is usually designed as a flange with sealing surface and threads.
  • this function can be integrated into the casting, whereas the flange must be specially attached to one or more deep-drawn parts during the design process.
  • the threads can be integrated into the casting, whereas in the production of plastic injection-molded parts, extra threaded bushes have to be injected.
  • a disadvantage of the known from the prior art heat exchangers is that their diffusers, if they are made for example of gray cast iron, due to the required material usage and mechanical processing are expensive and also heavy. In addition, these often no longer meet the current purity and corrosion requirements. Cast stainless steel diffusers are also expensive and heavy. In turn, die cast aluminum diffusers are of limited use in terms of service temperature and corrosion resistance. In exhaust gas heat exchangers, for example, only a bolted or clipped connection of these diffusers is possible. The same applies to trained as plastic injection molded part diffusers.
  • Diffusers in turn, which are made of several individual deep-drawn parts with attached flange, are expensive because each deep-drawn part a separate tool is required and the individual deep-drawn parts to the subsequent with each other as well as with the flange must be joined. Also, the tolerance requirements for the individual deep-drawn parts are very high.
  • 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 in particular enables a more cost-effective production.
  • the present invention is based on the general idea to produce a diffuser for a heat exchanger, such as an exhaust gas heat exchanger, no longer as previously casting or as a plastic injection molded part or a plurality of deep-drawn parts joined together, but this together with its two flanges, ie a first a housing of the Heat exchanger facing flange and a second flange facing away from it, as an integral deep-drawn part form.
  • the heat exchanger according to the invention which may be formed for example as an exhaust gas heat exchanger, has at both ends in a tube bottom held or trapped tubes for guiding a gaseous medium, such as exhaust gas, and a subsequent to the tube plates and enclosing the tubes housing for guiding a coolant.
  • a diffuser is connected, which has a housing facing the first flange and a second flange facing away from it.
  • these two flanges now form an integral part of the one-piece diffuser according to the invention designed as a deep-drawn part.
  • the diffuser according to the invention can not only one compared to gray cast iron diffusers
  • Significantly cheaper and lighter diffuser are created, but the production as a one-piece deep drawn is also much easier, since no longer several deep-drawn parts, each with correspondingly high tolerance requirements and these must be joined later in a subsequent processing step with each other and with at least the second flange.
  • the diffuser according to the invention can thus be inexpensive, easy and simple to manufacture, which also has a positive effect not only on the weight of the heat exchanger, but also on its production costs.
  • an inner contour of the first flange of the diffuser is complementary to an outer contour of the housing, so that the diffuser can be pushed with its first flange on the housing.
  • a gas-tight connection between the first flange of the diffuser and the housing is usually carried out by soldering, for example in a brazing furnace.
  • At least two threads are expediently arranged in the region of the second flange, via which screwing with a forward or downstream component is possible.
  • a fixing of the at least two nuts with the second flange is usually carried out via a soldered or welded connection. Particularly in the case of soldering, it is possible to combine this with the production of further solder joints, for example the connection of the diffuser to the housing, in a soldering furnace and thereby to produce it economically.
  • the second flange has a sealing plane with a circumferential edge, wherein the screw-in openings are arranged in the region of the edge.
  • the screw-in openings can either be punched through, in the event that the associated threads are realized via two nuts arranged behind them, or be put through, if the associated threads are produced by subsequent rolling. Due to the integral design of the second flange and its sealing plane with the diffuser, both the second flange and the peripheral edge forming the sealing plane can be manufactured comparatively easily and inexpensively.
  • the present invention is further based on the general idea to provide a simplified and cost-reduced method for manufacturing a diffuser for a heat exchanger described in the previous paragraphs, in which first the diffuser is manufactured as a one-piece deep drawn part having a first and a second flange.
  • the second flange is formed as a continuous plane.
  • a passage opening is now punched, wherein a peripheral edge formed as a sealing plane remains around this passage opening.
  • the passage opening later serves as the passage in the pipes flowing gaseous medium, such as exhaust gas.
  • at least two screw-in openings are introduced into the edge, either by means of punching or punching.
  • a thread that follows can be produced by forming, for example by rolling, in one piece with the second flange.
  • a thread that follows can be produced by forming, for example by rolling, in one piece with the second flange.
  • a heat exchanger 1 which may be formed, for example, as exhaust gas heat exchanger, a heat exchanger block 2 with held at both ends in a tube plate 3, 4 tubes 5 for guiding a gaseous medium, such as exhaust gas.
  • a gaseous medium such as exhaust gas.
  • a housing 6 for guiding a cooling medium is provided. The cooling medium is introduced via an inlet 7 into the housing 6 and discharged through an outlet 8 from this.
  • a diffuser 9, 9 ' which has a first flange 10, 10' facing the housing 6 and a second flange 11, 11 'facing away from it.
  • the description of the figures will now deal exclusively with the diffuser 9, it being understood that the diffuser 9 'could be designed in the same or similar manner.
  • the diffuser 9 with the two flanges 10, 11 is formed as a one-piece deep-drawn part, as also according to the Fig. 3 to 15 is shown.
  • An inner contour of the first flange 10 is formed complementary to an outer contour of the housing 6, so that the diffuser 9 with its first flange 10 on the housing 6 slidably and there is tightly connected to this, in particular soldered.
  • threads 12 are arranged, via which a screw with a pre or downstream component, such as an exhaust pipe, is possible.
  • the threads 12 can be realized in many different ways, as will be described below:
  • the threads 12 are each formed by a nut 13, which are arranged on an inner side of the second flange 11 in alignment with an associated screw-14.
  • the nuts 13 are welded or soldered to the second flange 11.
  • the nuts 13 themselves may be formed, for example, as square nuts 15, as for example according to the Fig. 4 10 and 11, or alternatively as hexagonal nuts 16, as shown in FIGS Fig. 5 and 12 and 13 is shown. Since the threads 12 are now in the exhaust gas-exposed area, the screws for fixing the upstream or downstream components, in the present case the downstream components, must be sealed accordingly.
  • the threads 12 can also be produced by forming, in particular by passing through the screw holes 14 in the second flange 11 and then rolling integral with the second flange 11, as for example in the diffusers 9 according to the Fig. 6 to 8 and FIGS. 14 and 15 are shown. Both ways of making the Thread 13 offer on the one hand simple and on the other hand cost-effective way of manufacturing.
  • the second flange 11 has a sealing plane 17 with a peripheral edge 18, wherein the peripheral edge 18 extends around a through opening 19 through which exhaust gas flows in operation.
  • the passage opening 19 can either be punched out, as for example according to the Fig. 9 to 15 is shown, or additionally have a stiffening collar 20, as for example in the through holes 19 according to the Fig. 3 to 5 the case is.
  • the diffuser 9 according to the invention can be produced comparatively easily by first producing it as a one-piece deep-drawn part with a first and a second flange 10, 11, ie deep-drawn, the second flange 11 being formed as a plane. In this plane of the second flange 11, a through hole 19 is now punched, wherein around the through hole 19 around a sealing layer 17 formed as a circumferential edge 18 remains. Simultaneously with the punching out of the passage opening 19, the circumferential collar 20 can optionally also be formed on it.
  • screw holes 14 are introduced, now now alternatively in the region of the screw holes 14 each thread 13 by forming, in particular by rolling, is integrally formed with the second flange 11, as for example according to the FIGS. 6 to 8 and 14 and 15 is shown, or it is in each case aligned with the screw-in openings 14 on an inner side of the second flange 11, a nut 13 is arranged, in particular soldered or welded, as shown in the Fig. 9 to 13 is shown.
  • the diffuser 9 according to the invention and the heat exchanger 1 according to the invention can be made comparatively simple and cost-effective and also lightweight, in particular in comparison to diffusers known from the prior art, which are designed, for example, as a cast part or must be assembled from a plurality of individual deep-drawn parts ,

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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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP16162358.2A 2015-03-26 2016-03-24 Fluide caloporteur Not-in-force EP3088834B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN331KO2015 2015-03-26

Publications (2)

Publication Number Publication Date
EP3088834A1 true EP3088834A1 (fr) 2016-11-02
EP3088834B1 EP3088834B1 (fr) 2020-05-06

Family

ID=55628936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16162358.2A Not-in-force EP3088834B1 (fr) 2015-03-26 2016-03-24 Fluide caloporteur

Country Status (1)

Country Link
EP (1) EP3088834B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019180377A1 (fr) * 2018-03-23 2019-09-26 Valeo Systemes Thermiques Dispositif de refroidissement d'un air d'admission de moteur a combustion interne
US11306982B2 (en) 2018-05-03 2022-04-19 Mann+Hummel Gmbh Heat exchanger, air intake system with a heat exchanger, and method for mounting a heat exchanger

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907163C2 (de) 1998-04-24 2003-08-14 Behr Gmbh & Co Wärmetauscher, insbesondere Abgaswärmetauscher
EP1367252A2 (fr) * 2002-05-30 2003-12-03 Valeo Termico S.A. Echangeur de chaleur pour gaz
DE10229083A1 (de) 2002-06-28 2004-01-15 Modine Manufacturing Co., Racine Wärmetauscher mit einem Diffusor
DE10359054A1 (de) * 2003-12-17 2005-07-21 Daimlerchrysler Ag Flansch
EP1801407A1 (fr) * 2004-09-28 2007-06-27 T.RAD Co,.Ltd Refroidisseur egr
DE102013218867A1 (de) * 2012-09-20 2014-03-20 Behr Gmbh & Co. Kg Wärmeübertrager

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907163C2 (de) 1998-04-24 2003-08-14 Behr Gmbh & Co Wärmetauscher, insbesondere Abgaswärmetauscher
EP1367252A2 (fr) * 2002-05-30 2003-12-03 Valeo Termico S.A. Echangeur de chaleur pour gaz
DE10229083A1 (de) 2002-06-28 2004-01-15 Modine Manufacturing Co., Racine Wärmetauscher mit einem Diffusor
DE10359054A1 (de) * 2003-12-17 2005-07-21 Daimlerchrysler Ag Flansch
EP1801407A1 (fr) * 2004-09-28 2007-06-27 T.RAD Co,.Ltd Refroidisseur egr
DE102013218867A1 (de) * 2012-09-20 2014-03-20 Behr Gmbh & Co. Kg Wärmeübertrager

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019180377A1 (fr) * 2018-03-23 2019-09-26 Valeo Systemes Thermiques Dispositif de refroidissement d'un air d'admission de moteur a combustion interne
FR3079267A1 (fr) * 2018-03-23 2019-09-27 Valeo Systemes Thermiques Dispositif de refroidissement d’un air d’admission de moteur a combustion interne
US11306982B2 (en) 2018-05-03 2022-04-19 Mann+Hummel Gmbh Heat exchanger, air intake system with a heat exchanger, and method for mounting a heat exchanger

Also Published As

Publication number Publication date
EP3088834B1 (fr) 2020-05-06

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