EP2020582A2 - Tube plat pour un échangeur thermique - Google Patents

Tube plat pour un échangeur thermique Download PDF

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Publication number
EP2020582A2
EP2020582A2 EP08013006A EP08013006A EP2020582A2 EP 2020582 A2 EP2020582 A2 EP 2020582A2 EP 08013006 A EP08013006 A EP 08013006A EP 08013006 A EP08013006 A EP 08013006A EP 2020582 A2 EP2020582 A2 EP 2020582A2
Authority
EP
European Patent Office
Prior art keywords
flat tube
fold
tube according
web
flat
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Withdrawn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
EP08013006A
Other languages
German (de)
English (en)
Other versions
EP2020582A3 (fr
Inventor
Michael Kohl
Kamal Galahroudi
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 EP2020582A2 publication Critical patent/EP2020582A2/fr
Publication of EP2020582A3 publication Critical patent/EP2020582A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the invention relates to a flat tube for a heat exchanger according to the preamble of claim 1.
  • Flat tubes for heat exchangers with at least one partition can be prepared by various methods, eg. B. by extrusion or by forming a sheet metal strip, which is closed longitudinally either by a weld or a solder seam.
  • soldered flat tubes the solder seam is in the region of the partition, so that the tube is sealed on the one hand to the outside and on the other hand between the flow channels formed by the partition wall.
  • a solder solder plating is usually used, which is applied to the outside of the flat tube.
  • a problem in the production of folded and brazed pipes with at least one partition wall is that the bandwidth of the metal strip to be formed is subject to tolerances, which can lead to different widths of the flat tube when forming a flat tube, for. B. if the partition is formed only by beveled at the edges of the metal strip webs. For the production of heat exchangers, however, a narrow tolerance tube width is required.
  • soldered flat tube with at least one partition, which by bevelled, to each other lying, with each other soldered webs is formed.
  • the webs are bent over at the ends and lie on the inside of the flat tube, resulting in a dense and stable solder joint on the one hand to the outside and on the other hand also between the adjacent flow channels.
  • a solder plating is provided on the outside of the flat tube here.
  • the measure of the seam height h and the sheet thickness d determine the dimension of the pipe width b and that tolerances and / or deformation-related dimensional deviations of the web dimension by the Fold height h to be recorded. Deviations of the ridge size, which result from tolerances of the bandwidth (the width of the sheet metal strip) or caused by the forming process, thus do not affect the pipe width b.
  • the production of the seam with the seam height h is thus the starting point of the tube forming process, while the webs which are joined last are dimensioned such that they can not influence the pipe width.
  • the fold or folds are formed from a first flat side of the flat tube, while the webs of the second, d. H. opposite side and the edge strip of the strip material are angled.
  • two folds are arranged side by side, which form a gap in which the webs are received.
  • the webs may be single-layered or double-layered - in the latter case, they have an envelope.
  • the webs are dimensioned so that there is always some air between the edge of the web and the inside of the flat pipe. H. a gap is left so that the ridge size can not influence the pipe width. Due to the double position of the bridge, d. H. Bridge with turn-up result for the partition six, seven or eight layers, whereby a high intrinsic stability is achieved.
  • At least one of the webs may have an end-side bevel, which rests on the flat tube. This also results in an increase in stability.
  • a partition wall which comprises only one fold and two webs arranged next to the fold.
  • the webs may be single or double-layered, ie formed with an envelope, wherein the single-layer web can in turn be folded at the ends. This also makes a flat tube with a high inherent stability against deformation reached.
  • the partition may thus comprise four, five or six layers.
  • a three-layer partition is provided, which is constructed only of a fold and a web, wherein both the fold and the web are formed by forming the edge strips of the strip material.
  • the web is enclosed by the fold, so that there is a tight soldering within the fold.
  • an internal plating is necessary so that the fold can also solder to the inside of the flat tube.
  • the advantage is achieved that the web height in conjunction with the sheet metal strip thickness determines the width of the tube and the ridge size remains without influence.
  • solder plating on the outside is sufficient to achieve a fluid tight connection in the partition wall area both outwardly and between the adjacent flow channels. Since no internal plating is necessary in this case, a protective plating or a corrosion-inhibiting coating can instead be made, which is advantageous for certain fluids, in particular coolants.
  • the protective cladding is not solderable.
  • the metal strip is made of an aluminum material or an aluminum alloy, which may be provided with a commercially available Lotplatt ist, preferably on the outside, if necessary, also on the inside.
  • Fig. 1 shows a flat tube 1, which is made by forming a metal strip 2 and two chambers or flow channels 3, 4, which are separated by a multi-layer partition 5 from each other.
  • the flat tube 1 has a first, lower flat side (also called a flat side) 1a and a second, upper flat side 1b, which are connected to each other at the end by rounded narrow sides 1c, 1d.
  • the flat tube 1 has a depth t and a width b.
  • the flat tube 1 is preferably used in a heat exchanger use and is the front side, flows from the narrow side 1c or 1d of air and flows through a liquid coolant.
  • the partition wall 5 must therefore separate the flow channels 3, 4 tightly from each other, in particular, when the flow direction in the flow channels 3, 4 extends in opposite directions.
  • the sheet-metal strip 2 is made of an aluminum material and preferably provided on one side with a Lotplatt ist. After the forming process, the flat tube 1 is soldered so that it is sealed to the outside and inside (between the adjacent flow channels 3, 4).
  • Fig. 1a shows an enlarged view of the region of the partition wall 5, which is formed by six layers of the sheet-metal strip 2.
  • the thickness of the sheet metal strip is denoted by d.
  • From the lower flat side 1 a two folds 6, 7 are formed, which leave a gap 8 of the width e between them. Within the gap 8, two webs 9, 10 are added, which are angled perpendicularly from the edge strips of the sheet metal strip.
  • the sheet-metal strip 2 has on one side a Lotplatt ist, not shown, which forms the outside of the flat tube 1.
  • solder surfaces 11, 12, 13 result between the folds 6, 7 and between the webs 9, 10.
  • a tightness of the flat tube 1 is ensured to the outside.
  • the end edges of the webs 9, 10 are soldered to the bottom of the gap 8, which can be done by capillary action of the solder present on the outside.
  • both sides of the sheet metal strip 2 with a Lotplatt ist - then all contact surfaces of the six-layer partition 5 are soldered together.
  • the two folds 6, 7 each have a height f, which together with the sheet metal strip thickness d gives the dimension b for the tube width.
  • the webs 9, 10 have a web height s, which is smaller than the seam height f even at the most unfavorable tolerance deviation.
  • Fig. 2 shows a second embodiment of the invention for a flat tube 20 with a modified partition 21, which in Fig. 2a is enlarged.
  • the partition wall 21 is formed six layers, ie six layers of the sheet metal strip are adjacent to each other and are soldered together.
  • the webs 22, 23 are formed in two layers, ie they each have an envelope 22a, 23a. From the lower flat side 21 a two folds 24, 25 are formed, which leave a gap 26 between them, which receives the double-layered webs 22, 23.
  • the additional two layers results in an increased intrinsic stability the tube already in unsoldered condition.
  • a solder plating is provided on the outside of the flat tube 20, resulting in a soldering of the webs 22, 23 both together and on the contact surfaces with the two folds 24, 25 results. This sealing is achieved inwards and outwards. If necessary, in this embodiment, therefore, a corrosion-inhibiting layer or a Schutzplatttechnik (which is not soldering) are applied.
  • Fig. 3 shows a third embodiment of the invention for a flat tube 30 with a modified partition wall 31, which increases in Fig. 3a is shown.
  • the partition is formed seven layers and has two folds 32, 33, a single-layer web 34 and a two-layer web 35 within the folds 32, 33.
  • the partition wall 31 is thus formed asymmetrically.
  • a Lotplatt réelle on the outside of the flat tube 30 is sufficient for a sufficient seal to the outside and inside, so that here also a Schutzplatt réelle on the inside can be made if necessary.
  • Fig. 4 shows two process steps of the forming process for the above-mentioned flat tube, in particular the embodiment according to Fig. 2 ,
  • the output stage of the method is an endless flat sheet metal strip 40 which has outer edge strips 40a, 40b and a width c.
  • the sheet-metal strip 40 is a semi-finished product, which is unwound from a coil (not shown) and fed to a pipe forming machine, not shown.
  • the width c is subject to certain manufacturing tolerances, ie the nominal size may vary up or down. These deviations must be compensated during the forming of the sheet metal strip. This happens as described above.
  • the flat sheet metal strip 40 is formed in various stages in the tube forming machine to a finished flat tube, wherein in Fig.
  • the established band sections are bent with the webs 43, 44 corresponding to the two arrows P1, P2 inward until the double-layered webs 43, 44 engage between the two folds 41, 42 and thus according to the Fig. 2a are accurately positioned.
  • the width of the finished tube then corresponds - as stated above - the sum of seam height f and tape thickness d.
  • the endless manufactured flat tube is cut to length and completed with ribs, not shown, to a flat-tube heat exchanger, also not shown. Thereafter, the soldering process for the entire heat exchanger. From this it is clear that the flat tube after the forming process and before the soldering process is subjected to various other production stages in which it must retain its shape, which is ensured by the increased intrinsic and dimensional stability.
  • Fig. 5 shows a fourth embodiment of the invention for a flat tube 50 with a modified partition 51, which in Fig. 5a is shown enlarged.
  • the partition 51 represents a development of the embodiment according to Fig. 3a it has two spaced-apart folds 52, 53 and a double-layered web 54 and a single-layer web 55, which has a fold 55a in the direction of the double-layered web 54 at its end.
  • the double-layer web 54 rests on the folded portion 55a, which in turn rests on the inside of the flat tube.
  • a Lotplatttechnik on the outside and, if necessary, a Schutzplattmaschine provided on the inside.
  • Fig. 6 shows a fifth embodiment of the invention for a flat tube 60 with a partition 61, which increases in Fig. 6a is shown.
  • the partition 61 is five-ply and comprises a fold 62, a double-ply Bridge 63 and a single-layer, inwardly beveled web 64.
  • a Lotplatt ist on the outside enough for a tightness to the outside and inward, ie a Schutzplatt réelle on the inside is possible.
  • only one fold 62 is provided, on which the two webs 63, 64 create from one side.
  • Fig. 7 shows a sixth embodiment of the invention for a flat tube 70 with a partition 71, which increases in Fig. 7a is shown.
  • the partition wall 71 constitutes a modification of the embodiment Fig. 6a It is also five-ply and is formed by a fold 72, a two-ply web 73 and a single-layer web 74 with a fold 74a, which rests on the inside of the flat tube 70.
  • the fold 74a is remote from the partition 71.
  • Fig. 8 shows a seventh embodiment of the invention for a flat tube 80 with a simplified partition 81, which increases in Fig. 8a is shown.
  • the flat tube 80 has a lower flat side 80a and an upper continuous flat side 80b.
  • the partition wall 81 is formed in three layers and comprises a fold 82 and a single-layer web 83, which is arranged between the two layers 82a, 82b of the fold 82.
  • a mutual Lotplatt ist attached is attached.
  • the height of the fold 82 is again indicated by f, the height of the ridge 83 by s and the width of the tube by b. Between the end edge of the web 83 and the inner arc of the fold, in turn, a gap a is left, so that the tube width is uniquely determined by the pre-stamped fold 82.
  • Fig. 9 shows an application example of the flat tube according to the invention, here the flat tube 1 according to the embodiment according to Fig. 1, 1a ,
  • the flat tubes 1 are joined with corrugated fins 90 to a single-row heat exchanger block 91.
  • the flat tubes 1 have due to the partition wall 5 on two flow channels 3, 4, which are flowed through in the same or opposite directions by a heat transfer medium, here preferably by a coolant.
  • the ribs 90 are overflowed by air.
  • the heat exchanger can preferably be used as a coolant radiator or radiator for a motor vehicle.
  • the ends of the flat tubes 1 are connected by soldering to tube sheets, not shown. It is advantageous that the flat tubes have as smooth outer sides, so that there is a dense soldering.
  • the entire heat exchanger, z. B. a so-called Ganzaluminiumkorauertrager soldered in one operation in a soldering furnace, not shown.
  • the flat tube according to the invention described above has the following dimensions:
  • the width b of the flat tube, optionally including the Lotplatt ist, is in a range of 0.5 to 10 mm, preferably in the range of 0.8 to 4 mm.
  • the thickness d of the sheet metal strip is in a range of 0.08 to 2 mm, preferably in a range of 0.1 to 0.6 mm.
  • the depth t of the flat tube is in a range of 6 to 100 mm, preferably in a range of 10 to 50 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP08013006.5A 2007-07-31 2008-07-18 Tube plat pour un échangeur thermique Withdrawn EP2020582A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007036307A DE102007036307A1 (de) 2007-07-31 2007-07-31 Flachrohr für einen Wärmeübertrager

Publications (2)

Publication Number Publication Date
EP2020582A2 true EP2020582A2 (fr) 2009-02-04
EP2020582A3 EP2020582A3 (fr) 2013-08-28

Family

ID=39938351

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08013006.5A Withdrawn EP2020582A3 (fr) 2007-07-31 2008-07-18 Tube plat pour un échangeur thermique

Country Status (2)

Country Link
EP (1) EP2020582A3 (fr)
DE (1) DE102007036307A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106767093A (zh) * 2016-12-27 2017-05-31 无锡逸龙铝热科技有限公司 一种直接成型压片式散热器扁管

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2491187B (en) * 2011-05-27 2014-02-26 Halla Visteon Climate Control Header for heat exchangers
CN105021077A (zh) * 2014-05-02 2015-11-04 泰安鼎鑫冷却器有限公司 一种双向连续折叠高强度散热管
DE102019217307A1 (de) * 2019-11-08 2021-05-12 Mahle International Gmbh Wärmeübertrager
CN112902728A (zh) * 2021-04-14 2021-06-04 浙江银轮机械股份有限公司 换热管、换热芯体及换热器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0302232A1 (fr) 1987-08-01 1989-02-08 Behr GmbH & Co. Tube plat pour un échangeur de chaleur
US5875668A (en) 1996-09-16 1999-03-02 Denso Corporation Roll forming method for forming flat tube and roll forming apparatus using the same
DE19857510A1 (de) 1997-12-23 1999-07-01 Valeo Thermique Moteur Sa Gebogenes und verlötetes Rohr für Wärmetauscher und derartige Rohre umfassender Wärmetauscher
EP1213555B1 (fr) 1999-09-08 2005-05-04 Zexel Valeo Climate Control Corporation Tube pour echangeur de chaleur et procede de fabrication du tube

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DE9318525U1 (de) * 1993-12-03 1995-04-06 Thermal-Werke, Wärme-, Kälte-, Klimatechnik GmbH, 68766 Hockenheim Wasser/Luft-Wärmetauscher aus Aluminium für Kraftfahrzeuge
FR2769359B1 (fr) * 1997-10-02 1999-12-24 Valeo Thermique Moteur Sa Tube plie muni de repliements internes formant cloisons, pour un echangeur de chaleur, notamment de vehicule automobile
JP2000055581A (ja) * 1998-07-31 2000-02-25 Zexel Corp 熱交換器
JP4061761B2 (ja) * 1999-01-26 2008-03-19 株式会社ティラド 熱交換器用チューブおよび熱交換器コア
GB2361301B (en) * 2000-03-16 2003-10-08 Denso Corp Self clamping groove in a seamed tube
GB0101697D0 (en) * 2001-01-23 2001-03-07 Emerson & Renwick Ltd Heat exchanger tube
JP4536273B2 (ja) * 2001-01-31 2010-09-01 株式会社ティラド 熱交換器用偏平チューブおよび熱交換器の製造方法
JP2002303496A (ja) * 2001-03-30 2002-10-18 Toyo Radiator Co Ltd 熱交換器用偏平チューブおよび熱交換器の製造方法
JP3855853B2 (ja) * 2002-06-05 2006-12-13 株式会社デンソー 偏平チューブとそのロール成形方法および装置
JP2005043026A (ja) * 2003-07-25 2005-02-17 Toyo Radiator Co Ltd 熱交換器用偏平チューブ
US20050092476A1 (en) * 2003-10-31 2005-05-05 Valeo Inc Folded tube for a heat exchanger and method of making same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0302232A1 (fr) 1987-08-01 1989-02-08 Behr GmbH & Co. Tube plat pour un échangeur de chaleur
US5875668A (en) 1996-09-16 1999-03-02 Denso Corporation Roll forming method for forming flat tube and roll forming apparatus using the same
DE19857510A1 (de) 1997-12-23 1999-07-01 Valeo Thermique Moteur Sa Gebogenes und verlötetes Rohr für Wärmetauscher und derartige Rohre umfassender Wärmetauscher
EP1213555B1 (fr) 1999-09-08 2005-05-04 Zexel Valeo Climate Control Corporation Tube pour echangeur de chaleur et procede de fabrication du tube
EP1521050B1 (fr) 1999-09-08 2006-12-20 Zexel Valeo Climate Control Corporation Tube d'échangeur de chaleur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106767093A (zh) * 2016-12-27 2017-05-31 无锡逸龙铝热科技有限公司 一种直接成型压片式散热器扁管
CN106767093B (zh) * 2016-12-27 2023-12-05 无锡逸龙铝热科技有限公司 一种直接成型压片式散热器扁管

Also Published As

Publication number Publication date
EP2020582A3 (fr) 2013-08-28
DE102007036307A1 (de) 2009-02-05

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