EP3190372A1 - Tube plat pour un échangeur de chaleur - Google Patents

Tube plat pour un échangeur de chaleur Download PDF

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Publication number
EP3190372A1
EP3190372A1 EP16204399.6A EP16204399A EP3190372A1 EP 3190372 A1 EP3190372 A1 EP 3190372A1 EP 16204399 A EP16204399 A EP 16204399A EP 3190372 A1 EP3190372 A1 EP 3190372A1
Authority
EP
European Patent Office
Prior art keywords
flat tube
bending region
radius
heat exchanger
end portions
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.)
Withdrawn
Application number
EP16204399.6A
Other languages
German (de)
English (en)
Inventor
Jürgen Hägele
Daniel Knapp
Wolfgang KNÖDLER
Volker Kurz
Oliver Siewers
Achim Utz
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 EP3190372A1 publication Critical patent/EP3190372A1/fr
Withdrawn legal-status Critical Current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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/151—Making tubes with multiple passages
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
    • 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
    • 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
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements

Definitions

  • the present invention relates to a flat tube for a heat exchanger with a back and two bent legs according to the preamble of claim 1.
  • the invention also relates to a heat exchanger with at least one such flat tube.
  • the invention further relates to a method for producing such a flat tube.
  • FR 2 757 258 A1 From the FR 2 757 258 A1 is a generic flat tube for a heat exchanger with a back and two bent legs known, each having a bent portion in a bending area. The two end portions are connected at their respective free ends to the back, whereby at least two parallel flow channels are formed.
  • An inner surface of a wall of the flat tube has an inner radius in the respective bending region, while an outer surface has an outer radius.
  • the present invention therefore deals with the problem of providing for a flat tube of the generic type an improved or at least one alternative embodiment, which is characterized in particular by an increased thermal cycling.
  • the flat tube according to the invention which is suitable for use in a heat exchanger, such as a coolant radiator, has a back and two bent legs, each having an end portion bent in a bending area. The two end portions are connected at their free ends to the back, so that such a folded flat tube has at least two parallel flow channels.
  • An inner surface of a wall of the flat tube has an inner radius in the respective bending region, while an outer surface has an outer radius.
  • the increased wall thickness of the wall of the flat tube in the bending area is now achieved in that the inner radius R I is greater than or equal to the outer radius R A , that is, R I ⁇ R A.
  • a wall thickness d of the wall in the bending region is less than 16 mm.
  • the present invention is further based on the general idea to equip a heat exchanger with at least one such flat tube and thus to create a heat exchanger, which has a significantly increased thermal shock resistance compared to previously known from the prior art heat exchangers.
  • the bending area is reshaped by massive forming in such a way that R I ⁇ R A. This can be achieved, for example, by pressing material from an outer edge into the outer radius area by means of massive forming.
  • a flat tube 1 according to the invention for a heat exchanger 2 has bent end portion 6.
  • the two end portions 6 are connected at their free ends 7 with the back 3, so that at least two parallel flow channels 8 are formed.
  • An inner surface 9 of a wall 10 of the flat tube 1 in this case has an inner radius R I in the respective bending region 5, while an outer surface 11 has an outer radius R A (compare in particular also FIGS FIGS. 2 and 3 ).
  • the inner radius R I is greater than or equal to the outer radius R A , that is, R I ⁇ R A. In this way it can be achieved that a wall thickness w of the wall 10 in the bending region 5 increases to a wall thickness W 1 , in particular as a function of a ratio between R A and R I.
  • the flat tube 1 according to the invention is used, for example, in brazed heat exchangers 2 (cf. 4 and 5 ), in which the flat tubes 1 in the associated passages 12 of the tube sheets 13 must be soldered tight.
  • the most critical point is the soldering at the point where the two end portions 6 abut (s. Fig. 7 ).
  • the size of the gap formed at this joint is expressed by an inner circle, the so-called delta diameter D. If this delta diameter D is greater than 0.16 mm, the solder can not be held securely there, ie at this point creates a hole and thus the radiator is leaking.
  • R A 2D.
  • R I R A + W.
  • the bending region 5 is deformed, the two legs 4 are bent with the respective end portions 6 arranged thereon in such a way that they lie parallel to the back 3 of the flat tube 1 and the two end portions 6 touch the back 3 at their free ends 7. Finally, the two end portions 6 are now tightly connected to the back 3, for example, soldered.
  • the wall thickness W 1 is greater than the wall thickness w in the region of the legs 4 or the end sections 6.
  • the thermal shock resistance of the heat exchanger 2 equipped therewith can be significantly increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP16204399.6A 2016-01-08 2016-12-15 Tube plat pour un échangeur de chaleur Withdrawn EP3190372A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016200152.3A DE102016200152A1 (de) 2016-01-08 2016-01-08 Flachrohr für einen Wärmeübertrager

Publications (1)

Publication Number Publication Date
EP3190372A1 true EP3190372A1 (fr) 2017-07-12

Family

ID=57570304

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16204399.6A Withdrawn EP3190372A1 (fr) 2016-01-08 2016-12-15 Tube plat pour un échangeur de chaleur

Country Status (2)

Country Link
EP (1) EP3190372A1 (fr)
DE (1) DE102016200152A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019208329A1 (de) * 2019-06-07 2020-12-10 Mahle International Gmbh Wärmeübertrager

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757258A1 (fr) 1996-12-12 1998-06-19 Valeo Equip Electr Moteur Tube plat a plusieurs canaux pour echangeur de chaleur
US6230533B1 (en) 1998-12-11 2001-05-15 Valeo Thermique Moteur Folded tube for a heat exchanger and method for shaping it
WO2002086408A1 (fr) * 2001-04-20 2002-10-31 Valeo Thermique Moteur Tube plie pour echangeur de chaleur et procede pour sa conformation
EP2177282A1 (fr) * 2008-10-16 2010-04-21 Behr GmbH & Co. KG Elément structurel en métal adapté au chargement pour un échangeur thermique, procédé de fabrication d'un élément structurel adapté au chargement
WO2012063443A1 (fr) 2010-11-11 2012-05-18 株式会社デンソー Tube pour échangeur de chaleur
EP1952904B1 (fr) * 2007-02-05 2012-08-29 Behr GmbH & Co. KG Procédé de déformation pour la formation d'un pliage dans un tube d'échangeur de chaleur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5505100A (en) * 1994-09-29 1996-04-09 Caterpillar Inc. Method of controlling interrupted shifts for a powershift transmission

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757258A1 (fr) 1996-12-12 1998-06-19 Valeo Equip Electr Moteur Tube plat a plusieurs canaux pour echangeur de chaleur
US6230533B1 (en) 1998-12-11 2001-05-15 Valeo Thermique Moteur Folded tube for a heat exchanger and method for shaping it
WO2002086408A1 (fr) * 2001-04-20 2002-10-31 Valeo Thermique Moteur Tube plie pour echangeur de chaleur et procede pour sa conformation
EP1952904B1 (fr) * 2007-02-05 2012-08-29 Behr GmbH & Co. KG Procédé de déformation pour la formation d'un pliage dans un tube d'échangeur de chaleur
EP2177282A1 (fr) * 2008-10-16 2010-04-21 Behr GmbH & Co. KG Elément structurel en métal adapté au chargement pour un échangeur thermique, procédé de fabrication d'un élément structurel adapté au chargement
WO2012063443A1 (fr) 2010-11-11 2012-05-18 株式会社デンソー Tube pour échangeur de chaleur

Also Published As

Publication number Publication date
DE102016200152A1 (de) 2017-07-13

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