EP1923650B1 - Tuyau plat, en particulier pour un échangeur thermique - Google Patents

Tuyau plat, en particulier pour un échangeur thermique Download PDF

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Publication number
EP1923650B1
EP1923650B1 EP20070022257 EP07022257A EP1923650B1 EP 1923650 B1 EP1923650 B1 EP 1923650B1 EP 20070022257 EP20070022257 EP 20070022257 EP 07022257 A EP07022257 A EP 07022257A EP 1923650 B1 EP1923650 B1 EP 1923650B1
Authority
EP
European Patent Office
Prior art keywords
flat pipe
metal strip
chambers
previous
solder
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
EP20070022257
Other languages
German (de)
English (en)
Other versions
EP1923650A1 (fr
Inventor
Christopher Dipl.-Ing. Walter
Michael Dipl.-Ing. Kohl
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 EP1923650A1 publication Critical patent/EP1923650A1/fr
Application granted granted Critical
Publication of EP1923650B1 publication Critical patent/EP1923650B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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

Definitions

  • the invention relates to a flat tube, in particular for a heat exchanger, according to the preamble of claim 1.
  • heat exchangers From the construction of heat exchangers, it is known to use, in particular made of aluminum flat tubes with multiple chambers, which can be produced in various ways. Are known extrusion methods and methods in which a metal strip or sheet metal strip is folded into a flat tube.
  • US 4,633,056 A describes a flat tube for a heat exchanger in which a z-shaped fold of a sheet metal strip forms a partition between two adjacent separate chambers of the exchanger tube.
  • the ends of the z-shaped folded sheet metal strip are turned over and abut to the enclosure of the chambers again in the region of the z-shaped fold. In this abutment area, the end areas are soldered or welded by electron beam. This means a considerable effort in the production of flat tubes.
  • an outer surface of the flat tube is largely plated with the solder material, the outer surface can be easily soldered with fin plates or similar elements, or even in its end regions with a bottom plate of the heat exchanger.
  • the sheet metal strip has a coating with a corrosion-inhibiting material that is different from the solder material.
  • a corrosion-inhibiting material may, for. B. be a coating based on zinc.
  • such a corrosion-inhibiting coating can also be applied to the solder plating, which however often means a reduction in the effectiveness of the protective coating. Therefore, the protective coating is particularly advantageously applied in areas in which there is no solder plating, in particular in the region of the inner surfaces of the chambers of the flat tube.
  • a width of the flat tube is determined essentially by the z-shaped fold and between about 0.5 mm and about 10 mm, particularly preferably between about 0.8 mm and about 4 mm, is.
  • the thickness of the sheet metal strip is preferably between about 0.1 mm and about 2 mm, and more preferably between about 0.15 mm and about 0.6 mm.
  • a depth of the flat tube in the depth direction is advantageously between about 6 mm and about 100 mm, more preferably between about 10 mm and about 50 mm.
  • a diameter of one of the chambers in the depth direction is advantageously between about 3 mm and about 50 mm, and more preferably between about 5 mm and about 25 mm.
  • Such dimensions are common in particular in the construction of heat exchangers of motor vehicles.
  • Fig. 1 shows a first embodiment of an unclaimed flat tube, which is made of a sheet-metal strip 1 based on an aluminum alloy.
  • the sheet metal strip 1 has a substantially rectangular cross section. A longitudinal direction of the sheet metal strip or of the flat tube runs perpendicular to the plane of the drawing Fig. 1 ,
  • the metal strip 1 is completely coated on each of its opposite sides with a Lotplatttechnik 2, 3.
  • a z-shaped fold 4 is first made in the middle region of the sheet metal strip 1.
  • the height of the fold 4 essentially determines the width of the finished flat tube.
  • left-side and right-side end portions 5, 6 of the sheet metal strip 1 are folded by 90 °, wherein the lengths of the end portions 5, 6 are not greater than the height of the z-shaped fold 4.
  • the areas of the sheet metal strip left and right of the fold 4 to Training two closed chambers 7, 8 of the flat tube turned over by 180 °.
  • the angled end portions 5, 6 with their outer surfaces touch the partition wall 4 on its opposite sides.
  • the prefolded flat tube (see lower illustration in Fig. 1 ) is subsequently placed in a soldering furnace, wherein by melting the Lotplattierungen the end portions 5, 6 are each soldered to the partition 4 fixed. As a result, the chambers 7, 8 sealed tight and pressure-resistant.
  • the height of the bent end region 5, 6 is in each case approximately smaller than the height of the dividing wall 4.
  • the width of the flat tube is not determined by the end regions, which is advantageous in the light of the dimensional tolerances of the width of the metal strip.
  • the inner surfaces of the chambers 7, 8 are not provided with Lotplatt réelle, but solder plating is only in the narrow area of the connection of the end portions 5, 6 with the partition wall 4 before.
  • solder plating 2 is applied only on one side of the sheet metal strip 1.
  • the solder plating 2 extends only from one lateral end to slightly above the middle of the sheet metal strip 1 (see top illustration in FIG Fig. 2 ).
  • the z-shaped fold 4 is still provided with solder plating on one side and also has one of the two ends 6 on one side Lotplatt réelle.
  • the other bent end 5 of the sheet-metal strip 1 has no Lotplatt réelle and is soldered in the finished bent state with the one-sided Lotplatt réelle the fold 4.
  • a flat tube with two chambers 7, 8 are folded, in which the inside of the chambers 7, 8 is no Lotplatt réelle present and outside a Lotplatt réelle only on a chamber 8 is present.
  • a corrosion protection layer is not explicitly shown in any of the illustrated or claimed embodiments. It may be particularly expedient depending on the requirements of the places where the sheet metal strip 1 is not occupied by Lotplatttechnik.
  • solder plating be present on the entire outer surface of the flat tube, for example for better connection with fin plates or other components of the heat exchanger
  • the solder plating as in the not claimed embodiment according to Fig. 3 be applied on both opposite sides of the metal strip 1, wherein the respective Lotplatt ist extends on one side only to about the middle of the metal strip 1.
  • the metal strip is plated with solder only on one side at each point, the opposite side not being plated with solder at this point (see the upper illustration in FIG Fig. 3 ).
  • the in Fig. 3 According to the in Fig.
  • the sheet metal strip is provided a flat tube having Lotplatt réelle on its entire outer surface and wherein the entire inner surface of the chambers 7, 8 is free of Lotplatt réelle.
  • a flat tube according to the invention is in Fig. 4 shown.
  • To get an excess of solder plating in the area the connection of the end portions 5, 6 to avoid the partition 4 is provided in the central region of the sheet metal strip 1 on either side of a Lotplatt réelle. This occupied on both sides not with Lotplatt réelle area 1 a of the metal strip 1 corresponds in its width about the z-shaped fold 4 (see middle illustration in Fig. 4 ).
  • the solder plating which serves to solder the end regions 5, 6 to the central fold region 4 is present in each case on the end regions 5, 6.
  • a "double" Lotplatt réelle in the investment area as in the not claimed embodiment according to Fig. 3 is thus avoided.
  • Fig. 5 shows a schematic sectional view of a heat exchanger with flat tubes according to one of the embodiments described above.
  • the flat tubes each have two in the depth direction of the heat exchanger arranged one behind the other chambers 7, 8 and between two adjacent flat tubes respectively rib members 9 are provided.
  • the rib element 9 serves to increase the contact surface with the fluid flowing past in the depth direction on the flat tubes, which absorbs heat from the fluid guided in the flat tubes or emits into this.
  • the rib elements 9 are suitably soldered to the surface of the flat tubes 7.
  • the solder plating provided on the outer surfaces of the flat tubes is used in a preferred manner.
  • Fig. 6 shows an example of a non-claimed flat tube, in which four separate chambers are arranged in the depth direction one behind the other.
  • the sheet metal strip 1 according to the illustration Fig. 6 is shown without Lotplatt ist, provided with a total of three Z-shaped folds 4a, 4b, 4c, which alternate in their folding direction.
  • the lateral end portions 5, 6 of the sheet metal strip 1 are angled and on each side of a sufficiently long projection of the sheet metal strip is folded. In each case, the end regions 5, 6 abut the outer folds 4a, 4c and are soldered to them.
  • two chambers 7a, 8a of the four chambers of the flat tube have a double wall.
  • the entire metal strip 1 may have a corresponding Lotplatt réelle or even a selectively provided only in the areas in question Lotplatt réelle.
  • Fig. 7 shows a schematic representation of an unclaimed heat exchanger with the four-chamber flat tubes according to Fig. 6 .
  • such flat tubes preferably have an even number of chambers, whereby the folding of the metal strip is simplified and in particular can be dispensed with bead-like folds for the production of partitions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (8)

  1. Tube plat, en particulier pour un échangeur de chaleur, comprenant une bande de tôle (1) s'étendant suivant une direction longitudinale du tube plat, où le tube plat est déformé par des coudes de la bande de tôle (1) autour de la direction longitudinale,
    où le tube plat présente au moins deux chambres (7, 8) disposées l'une derrière l'autre dans le sens de la profondeur, où il est prévu, entre les chambres (7, 8), au moins une paroi de séparation (4) configurée par une coude de la bande de tôle, sensiblement en forme de z, et où les deux zones d'extrémités coudées (5, 6) de la bande de tôle (1) sont contiguës à la paroi de séparation (4), où la bande de tôle (1) présente au moins partiellement un placage (2, 3) se composant d'un matériau à braser, caractérisé en ce que le placage (2, 3) est disposé des deux côtés de la bande de tôle (1), dans une zone partielle en forme de bande dans le sens de la longueur, et ce, de manière telle, que chaque emplacement, jusqu'à une zone centrale (1a), soit plaqué avec de la brasure seulement sur un côté, où, au niveau de cet emplacement, le côté opposé n'est pas plaqué avec de la brasure, de sorte qu'une surface intérieure des chambres (7, 8) ne présente dans une large mesure aucun placage avec de la brasure, et une surface extérieure du tube plat et une zone de la jonction des zones d'extrémités (5, 6), au niveau de la paroi de séparation (4), sont dans une large mesure planquées avec le matériau à braser.
  2. Tube plat selon la revendication 1, caractérisé en ce que la zone centrale (1a) correspond, dans sa largeur, à peu près à la pliure (4) en forme de z.
  3. Tube plat selon l'une ou l'autre des revendications précédentes, caractérisé en ce que la bande de tôle (1) présente un revêtement comportant un matériau anticorrosif, différent du matériau à braser.
  4. Tube plat selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une largueur du tube plat est déterminée essentiellement par la pliure (4) en forme de z et est comprise entre 0,5 mm environ est 10 mm environ, en particulier entre 0,8 mm, environ et 4 mm environ.
  5. Tube plat selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une épaisseur de la bande de tôle (1) est comprise entre 0,1 mm environ et 2 mm environ, en particulier entre 0,15 mm environ et 0,6 mm environ.
  6. Tube plat selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une profondeur du tube plat, dans le sens de la profondeur, est comprise entre 6 mm environ et 100 mm environ, en particulier entre 10 mm environ est 50 mm environ.
  7. Tube plat selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un diamètre d'une chambre (7, 8), dans le sens de la profondeur, est comprise entre 3 mm environ et 50 mm, environ, en particulier entre 5 mm environ et 25 mm environ.
  8. Tube plat selon l'une quelconque des revendications précédente, caractérisé en ce que le nombre de chambres (7, 8) est exactement de deux.
EP20070022257 2006-11-16 2007-11-16 Tuyau plat, en particulier pour un échangeur thermique Not-in-force EP1923650B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610054036 DE102006054036A1 (de) 2006-11-16 2006-11-16 Flachrohr, insbesondere für einen Wärmetauscher

Publications (2)

Publication Number Publication Date
EP1923650A1 EP1923650A1 (fr) 2008-05-21
EP1923650B1 true EP1923650B1 (fr) 2013-03-13

Family

ID=39103034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070022257 Not-in-force EP1923650B1 (fr) 2006-11-16 2007-11-16 Tuyau plat, en particulier pour un échangeur thermique

Country Status (2)

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EP (1) EP1923650B1 (fr)
DE (1) DE102006054036A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009041618A1 (de) * 2009-09-17 2011-03-24 Behr Gmbh & Co. Kg Flachrohr für einen Wärmetauscher
CN105525980A (zh) * 2014-09-30 2016-04-27 泰安鼎鑫冷却器有限公司 一种耐腐蚀高强度散热管

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327660A1 (de) * 1983-06-20 1984-12-20 Motoren Turbinen Union Verfahren zur herstellung von profilroehrchen fuer roehrchenwaermetauscher
FR2547649A1 (fr) 1983-06-14 1984-12-21 Mtu Muenchen Gmbh Procede de fabrication de petits tubes profiles pour des echangeurs de chaleur a petits tubes et petits tubes ainsi realises
DE19548244B4 (de) * 1995-12-22 2006-03-02 Behr Gmbh & Co. Kg Verfahren zur Herstellung von hartgelöteten Aluminium-Wärmetauschern
DE19548495C2 (de) * 1995-12-22 2000-04-20 Valeo Klimatech Gmbh & Co Kg Wärmetauscherblock für Wärmetauscher für Kraftfahrzeuge und Verfahren zu dessen Herstellung
FR2749648B1 (fr) * 1996-06-05 1998-09-04 Valeo Thermique Moteur Sa Tube plat a entretoise mediane pour echangeur de chaleur
FR2770634B1 (fr) * 1997-11-06 2000-01-28 Valeo Thermique Moteur Sa Tube plie a deux canaux de circulation pour echangeur de chaleur
JP3901349B2 (ja) * 1998-06-12 2007-04-04 カルソニックカンセイ株式会社 熱交換器用扁平伝熱管
DE10053653A1 (de) * 2000-10-28 2002-05-08 Modine Mfg Co Flachrohr für Wärmetauscher und Herstellungsverfahren
FR2832788B1 (fr) * 2001-11-26 2004-06-04 Valeo Climatisation Profils de tubes pour echangeur thermique

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Publication number Publication date
DE102006054036A1 (de) 2008-05-21
EP1923650A1 (fr) 2008-05-21

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