EP0732560A2 - Echangeur de chaleur à tubes doubles et procédé pour sa fabrication - Google Patents

Echangeur de chaleur à tubes doubles et procédé pour sa fabrication Download PDF

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Publication number
EP0732560A2
EP0732560A2 EP96103446A EP96103446A EP0732560A2 EP 0732560 A2 EP0732560 A2 EP 0732560A2 EP 96103446 A EP96103446 A EP 96103446A EP 96103446 A EP96103446 A EP 96103446A EP 0732560 A2 EP0732560 A2 EP 0732560A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
tube heat
tube
exchanger according
tubes
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
EP96103446A
Other languages
German (de)
English (en)
Other versions
EP0732560B1 (fr
EP0732560A3 (fr
Inventor
Karl-Heinz Dipl-Ing. Staffa
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 Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0732560A2 publication Critical patent/EP0732560A2/fr
Publication of EP0732560A3 publication Critical patent/EP0732560A3/fr
Application granted granted Critical
Publication of EP0732560B1 publication Critical patent/EP0732560B1/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
    • 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
    • F28F9/0234—Header boxes; End plates having a second heat exchanger disposed there within, e.g. oil cooler
    • 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
    • F28D7/10—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 one within the other, e.g. concentrically
    • F28D7/106—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 one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • 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
    • Y10S165/916—Oil cooler

Definitions

  • the invention relates to a double-tube heat exchanger, consisting of two coaxially nested tubes, in particular made of aluminum, which are tightly connected at their ends to form a flow channel between them, a turbulence insert possibly being inserted into the flow channel, and a method for its production
  • Double tube heat exchangers of this type are known.
  • DE-OS 30 21 240 shows a stainless steel double tube heat exchanger in which the two steel tubes are connected at their ends by means of a fusion welding process.
  • the inner tube is widened there in its end region, to the extent that the widened part of the inner tube runs parallel to the outer tube over a certain length.
  • the welding is carried out in this area.
  • a turbulence insert sits between the two pipes.
  • this double tube heat exchanger In the manufacture of this double tube heat exchanger, the procedure is such that after attaching to fittings on the outer tube with the aid of a projection welding method, the two tubes are pushed into one another with the aid of a device, after which the ends of the inner tube are then so applied by applying pressure be widely expanded that they rest on the outer tube for the purpose of welding.
  • Such a type of production is relatively complex.
  • the invention has for its object to propose a double tube heat exchanger of the type mentioned and a method for its production, which are particularly suitable for the use of aluminum as a starting material, make a complex assembly process unnecessary and also avoid the risk of corrosion.
  • a double-tube heat exchanger of the type mentioned in which at least one of at least two ends of the tubes one of the tubes protruding circumferential beaded collar is provided, the height of which corresponds to the difference between the radii of the inner wall of the outer and the outer wall of the inner tube and in which the collars are soldered tightly to the tube wall against which they rest.
  • the bundles also serve for tight soldering, the so-called Nocolok soldering method expediently using the method provided according to the invention and explained later (see SAE Technical Paper Series, Claydon and Sugihara, Brazing Aluminum Automotive Heat Exchanger Assemblies Using a Non-Corrosive Flux Process, International Congress & Exposition Detroit USA, February 28 to March 4, 1983), which uses a flux which is non-corrosive after soldering and whose residues therefore do not need to be removed. It is necessary that at least one of the pipes to be joined together later consists of a suitable solder-plated material and is provided with Nocolok flux at the points to be soldered. Either both pipes or only one can be plated accordingly. It is also possible to plate the turbulence insert.
  • each bead-like collar can be pressed out of the material of the tube in the manner of a circumferential bead just before its end. It is possible for each tube to be provided with a bead at only one end, the beads then being opposite one another when the tubes are inserted into one another and enclosing the flow channel between them. However, it is also possible to provide only one tube with two beads and to leave the other tube smooth. Rolling to form the beads is also possible.
  • a method has proven to be particularly advantageous in which at least one of the tubes is first pressed out in the region of the ends of the tube-like beads, then at least one of the tubes before or after the beads are pressed out or, if necessary, the turbulence insert is charged with a Nocolok flux, then the two tubes are pushed over one another and kept at a distance by the beads, after which the tubes held together are heated for the purpose of soldering.
  • the new double tube heat exchanger is particularly suitable as an oil cooler for installation in a water tank of a cooler for a motor vehicle engine.
  • a double-tube heat exchanger designed as a double-tube oil cooler, which consists of an outer tube (1) and an inner tube (2) each made of solder-plated aluminum.
  • the tubes are made from a flat material bent after plating and joined with a longitudinal weld.
  • Two connecting pieces (3 and 4) are placed on the outer tube in a manner known per se, through which oil, for example hot engine or gear oil, in the direction of the arrows (5) into an annular flow channel (6) between the outer tube and the inner tube (1 or 2) can be performed, which is to be cooled by a second heat exchange medium, in the exemplary embodiment water, which is guided through the inner tube (2) and enters it in the direction of the arrow (7).
  • the oil flows through the inlet connection (3) and through an inlet opening (not shown) in the pipe (1) and leaves this flow channel through the outlet connection (4) and through one also not shown opening in the outer tube (1).
  • the flow channel (6) is provided with a turbulence insert (8) which is designed in a known manner.
  • the flow channel (6) is delimited on the outside by a circumferential bead-like collar (9) which is pressed out in the form of a circumferential bead (see also FIG. 2) from the inner tube (2) in the region of the left end (2a) thereof.
  • the height (h) (Fig.
  • the procedure is such that the inner tube (2) is first provided with the beads (9 or 10) pressed out in the region of its two ends.
  • the inner tube (2) or the outer tube (1) are then provided with flux and after the turbulence insert (8) has been arranged between the collars (9 and 10), the outer tube (1) is pushed open axially.
  • An expansion of the inner tube (2) will then generally be provided in order to bring the turbulence plate (8) in the annular flow channel (6) into a solderable system on the tube walls.
  • the arrangement thus produced is heated to the necessary temperature in the soldering furnace, so that dense solder joints are formed in the region of the bundles (9 and 10) and, of course, also in the region of the attached connecting pieces (3 and 4). After cooling, the double tube heat exchanger is ready.
  • Fig. 3 shows a modification insofar as here the outer tube (1 ') is provided in the region of its right end with a circumferential collar (10') pressed inwards like a bead, while the inner tube (2) is only provided at its left end with the outward collar (9) is provided.
  • Both bundles (9 and 10 ') are dimensioned as the collar (9) and as previously described, so that during manufacture, the turbulence insert (8) in tube form can be pushed onto the inner tube (2) until it comes into contact with the collar (9).
  • the outer tube (1 ') can then be pushed axially from right to left, ie in the direction of arrow (7) onto the inner tube (2) and onto the turbulence insert (8). until the pipe ends are aligned.
  • the soldering process is then carried out in the same manner as previously explained.
  • This embodiment has the advantage that the turbulence insert can also be pushed on axially, so that a relatively simple assembly is possible.
  • Fig. 4 shows a variant in that here a smooth outer tube (1) (as in Fig. 1) is provided, but that the inner tube (2 ') has at its left end an outwardly rolled collar (11), the Dimensions correspond to those of the federal government (9).
  • This rolled collar (11) also allows the outer tube (1) to be placed and guided during assembly. At the same time, this collar (11) serves as a sealing point after the soldering process.
  • the inner tube (2 ') can be provided with an outwardly rolled collar (11) at both ends. It is also possible to arrange only the left rolled collar (11) shown, while the outer tube (1) has an inwardly rolled collar on the right side, so that assembly as in FIG. 3 is possible.
  • the outer tube (2) has bundles rolled inwards, as is also possible in principle in the technical reversal in the embodiment according to FIG. 1, in which the bundles (9 and 10) are not directed outwards from the inner tube, but inwards from the outer tube (1).
  • All of the embodiments ensure simple installation and are particularly suitable for the production of the double tube heat exchanger made of aluminum and for the soldering using the Nocolok process.
  • an advantageous embodiment of the new double-tube heat exchanger is shown in that the double-tube heat exchanger is installed there directly as an oil cooler in one of the cooler sumps for the engine coolant.
  • a double-tube cooler (12) is installed directly in a collecting tank (13) of a coolant cooler for a motor vehicle engine, which is not shown in detail because it is known.
  • the collecting box (13) is closed from its lower end (13a) by a tube sheet (not shown) and therefore there is a flow against the outer tube (14) of the tubes opening into the tube sheet but also not shown ( 1) of the double tube oil cooler (12) instead.
  • the flow of the coolant also passes through the interior of the inner tube (2) if the double-tube cooler is suitably arranged for supply or return connection of the collecting tank (13).
  • the outer tube (1) has been provided with an opening (15) at at least two points and the edge of this hole has then been pulled out in a collar-like manner by conventional means and in the form of the flanged edge (16) around an opening in the collecting box (13) crimped around.
  • a connection piece (3 ') is then placed on the opening (15) in the outer tube (2) and in the collecting box (13), which, like the flanged edge (16), is tightly soldered to the collecting box (13).
  • the collecting box (13) in the exemplary embodiment also consists of a solder-plated aluminum, so that it is sufficient for the production to apply the suitable flux in the region of the edge (16) and in the region of the seated jaws of the connection (3 ') in order to with the Nocolok process, a complete tight soldering of the double tube cooler (12) (as is also explained in the previous figures) and the connection between this double tube cooler and the header box (13) and its connection piece (3 ').
  • the outer tube (1) is of course also assigned a further opening, not shown in FIG. 5, which is fastened in the same way to the collecting box (13) and with it is soldered so that, as in the examples of FIGS. 1 to 4, the oil to be cooled is fed into the space between the outer tube (1) and inner tube (2) through the connecting piece (3 ') and again through the connecting piece (not shown) can be dissipated.
  • the advantage of the embodiment shown in FIG. 5 is that a cooler made exclusively of aluminum can be provided with a double-tube oil cooler, on which no other materials are used, so that simple recycling is possible.
  • Fig. 6 shows an embodiment largely similar to that of Fig. 5. The only difference is that here the neck (17) of the double-tube cooler (12 ') drawn outwards from the opening (15) does not extend around the edge of a corresponding opening in the Collection box (13 ') flanged around, but is pressed into a corresponding recess (18) of the connecting piece (3' '). This neck (17) can also be pressed into the groove (19) within the connecting piece (3 '').
  • This embodiment also enables perfect recycling since the entire cooler, including the double tube cooler, is made of aluminum.
  • the collecting box (13) can either - as shown in FIGS. 5 and 6 - be half-shell-shaped and soldered to an additional metal base, or it can be made in one piece from a solder-plated tube or from two half-shells soldered to one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP96103446A 1995-03-17 1996-03-06 Echangeur de chaleur à tubes doubles et procédé pour sa fabrication Expired - Lifetime EP0732560B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19509788 1995-03-17
DE19509788A DE19509788A1 (de) 1995-03-17 1995-03-17 Doppelrohrwärmetauscher und Verfahren zu seiner Herstellung

Publications (3)

Publication Number Publication Date
EP0732560A2 true EP0732560A2 (fr) 1996-09-18
EP0732560A3 EP0732560A3 (fr) 1997-10-29
EP0732560B1 EP0732560B1 (fr) 2001-05-23

Family

ID=7757004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103446A Expired - Lifetime EP0732560B1 (fr) 1995-03-17 1996-03-06 Echangeur de chaleur à tubes doubles et procédé pour sa fabrication

Country Status (3)

Country Link
US (1) US5732769A (fr)
EP (1) EP0732560B1 (fr)
DE (2) DE19509788A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0846931A3 (fr) * 1996-12-03 1999-03-31 Calsonic Corporation Dispositif et méthode pour monter un refroidisseur d'huile
EP0840081A3 (fr) * 1996-10-29 1999-04-14 Denso Corporation Echangeur de chaleur et sa méthode de fabrication

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5967111A (en) * 1998-03-24 1999-10-19 Purolator Products Company Arrangement in an oil filter with integral oil cooler
DE19820412A1 (de) * 1998-05-07 1999-11-11 Behr Gmbh & Co Wärmeübertrageranordnung für ein Kraftfahrzeug
US6746600B2 (en) * 2001-10-31 2004-06-08 Arvin Technologies, Inc. Fluid filter with integrated cooler
US20040089439A1 (en) * 2002-11-07 2004-05-13 Treverton Andrew Clare Tube-to-tube heat exchanger assembly
JP3794392B2 (ja) * 2003-02-25 2006-07-05 日産自動車株式会社 電気自動車の駆動ユニット
US20050155748A1 (en) * 2003-08-29 2005-07-21 Dana Canada Corporation Concentric tube heat exchanger end seal therefor
US20050045315A1 (en) * 2003-08-29 2005-03-03 Seager James R. Concentric tube heat exchanger and end seal therefor
DE10347676A1 (de) * 2003-10-09 2005-05-04 Behr Gmbh & Co Kg Heizungskreislauf für ein Kraftfahrzeug
US7191824B2 (en) * 2003-11-21 2007-03-20 Dana Canada Corporation Tubular charge air cooler
DE102004037392A1 (de) * 2004-07-30 2006-03-23 Behr Gmbh & Co. Kg Verfahren zum Löten eines Wärmeübertragers und Wärmeübertrager, hergestellt nach dem Verfahren
KR100721459B1 (ko) * 2005-11-19 2007-05-25 주식회사 경동에버런 난방 및 온수겸용 순간식 보일러의 이중관 열교환기 및보일러
KR100641277B1 (ko) * 2005-11-22 2006-11-02 주식회사 경동에버런 난방 및 온수겸용 보일러의 이중관 열교환기
JP4864439B2 (ja) * 2005-12-06 2012-02-01 株式会社デンソー 二重管、およびその製造方法
DE102007027639A1 (de) * 2007-06-15 2008-12-18 Rolls-Royce Deutschland Ltd & Co Kg Wärmetauscher für eine Fluggasturbine
DE102009028455A1 (de) * 2009-08-11 2011-02-17 Ford Global Technologies, LLC, Dearborn Kühlmittelumströmte Ölleitung
US9052146B2 (en) 2010-12-06 2015-06-09 Saudi Arabian Oil Company Combined cooling of lube/seal oil and sample coolers
DE102011008119A1 (de) 2011-01-07 2012-07-12 Arup Alu-Rohr Und -Profil Gmbh Doppelrohr, sowie Doppelrohr-Wärmetauscher
US20120222849A1 (en) * 2011-03-02 2012-09-06 Yen-Ti Liu Oil-Cooling Tube
GB201513415D0 (en) * 2015-07-30 2015-09-16 Senior Uk Ltd Finned coaxial cooler
JP7169923B2 (ja) * 2019-03-27 2022-11-11 日本碍子株式会社 熱交換器
CN111750705B (zh) * 2019-03-28 2022-04-29 日本碍子株式会社 热交换器的流路结构以及热交换器
CA3153400A1 (fr) 2021-04-07 2022-10-07 Ecoinnovation Technologies Incorporee Echangeur de chaleur modulaire et methode d'assemblage

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DE3133756A1 (de) 1980-10-10 1982-07-29 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Doppelrohrkuehler
DE3912534A1 (de) 1989-04-17 1990-10-18 Hansa Metallwerke Ag Benzinkuehler

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DE2612416A1 (de) 1975-04-02 1976-10-21 Ferodo Sa Kuehlvorrichtung
DE3021240A1 (de) 1979-08-03 1981-02-19 Modine Mfg Co Waermetauscher und verfahren zu seiner herstellung
DE3133756A1 (de) 1980-10-10 1982-07-29 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Doppelrohrkuehler
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6029348A (en) * 1996-04-11 2000-02-29 Calsonic Corporation Oil cooler mounting structure and oil cooler mounting method
EP0840081A3 (fr) * 1996-10-29 1999-04-14 Denso Corporation Echangeur de chaleur et sa méthode de fabrication
US6206089B1 (en) 1996-10-29 2001-03-27 Denso Corporation Heat exchanger and method for manufacturing the same
EP0846931A3 (fr) * 1996-12-03 1999-03-31 Calsonic Corporation Dispositif et méthode pour monter un refroidisseur d'huile

Also Published As

Publication number Publication date
EP0732560B1 (fr) 2001-05-23
DE19509788A1 (de) 1996-09-19
EP0732560A3 (fr) 1997-10-29
US5732769A (en) 1998-03-31
DE59606931D1 (de) 2001-06-28

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