EP1630513A2 - Tube plat pour echangeur de chaleur, en particulier pour véhicules et méthode de production - Google Patents

Tube plat pour echangeur de chaleur, en particulier pour véhicules et méthode de production Download PDF

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Publication number
EP1630513A2
EP1630513A2 EP05014942A EP05014942A EP1630513A2 EP 1630513 A2 EP1630513 A2 EP 1630513A2 EP 05014942 A EP05014942 A EP 05014942A EP 05014942 A EP05014942 A EP 05014942A EP 1630513 A2 EP1630513 A2 EP 1630513A2
Authority
EP
European Patent Office
Prior art keywords
flat
turbulators
flat tube
tube
strip
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
EP05014942A
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German (de)
English (en)
Other versions
EP1630513B1 (fr
EP1630513A3 (fr
Inventor
Jürgen Dipl.-Ing. Hägele (FH)
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 EP1630513A2 publication Critical patent/EP1630513A2/fr
Publication of EP1630513A3 publication Critical patent/EP1630513A3/fr
Application granted granted Critical
Publication of EP1630513B1 publication Critical patent/EP1630513B1/fr
Active 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
    • 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
    • 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
    • B21C37/156—Making tubes with wall irregularities
    • B21C37/158—Protrusions, e.g. dimples
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • 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
    • F28F2001/027—Tubular elements of cross-section which is non-circular with dimples

Definitions

  • the invention relates to a flat tube for a heat exchanger, in particular for motor vehicles according to the preamble of claim 1 and a method for producing a flat tube according to the preamble of claim 10.
  • flat tubes for heat exchangers from a sheet-metal strip, preferably from a double-side solder-plated aluminum strip in a continuous process on a corresponding pipe-making machine. After bending and forming the flat tube cross-section, the flat tube is closed by a welded or soldered longitudinal seam.
  • Such flat tubes are z. B. used for coolant radiator in motor vehicles, the flat tubes are joined with corrugated ribs to form a block and soldered.
  • the flat tube cross-sections are formed as slim as possible, to increase the internal pressure resistance webs, folds or beads are provided which act as tie rods and divide the flat tube cross-section into chambers.
  • flat tubes which are not designed as multi-chamber tubes, but have a continuous cross-section, wherein to increase the heat transfer to the inside of the tube, ie, for. B. on the coolant side so-called turbulators or vortex generators are provided in the form of inwardly directed impressions. These turbulators on both sides touch each other not, but leave between them a distance, ie a clear channel height for a core flow; they do not act as tie rods. In order to achieve the necessary internal pressure resistance of such flat tubes, these tubes must be designed thick-walled accordingly. This increases the weight and the material consumption.
  • Another multi-chamber tube was known from EP 0 637 474 A1, wherein the individual chambers are divided by brazed together, extending in the longitudinal direction beads.
  • flat tubes are disclosed which are reinforced by knob-like tie rods.
  • EP 0 302 232 A1 and DE 102 12 300 A1 of the Applicant have disclosed folded and brazed multi-chamber tubes and methods for producing a folded multi-chamber tube.
  • DE 101 27 084 A1 of the applicant has disclosed a flat tube for a heat exchanger, in particular a coolant radiator for motor vehicles, wherein the flat sides of the flat tube have inwardly directed forms, so-called vortex generators or turbulators.
  • This achieves improved heat transfer of the coolant flowing through the flat tubes.
  • these flat tubes are not designed as multi-chamber tubes and also have no tie rods, z. B. from each other soldered nubs. It is therefore necessary to form these tubes thick-walled in order to achieve the required internal pressure resistance.
  • the turbulators are preferably formed as elongated impressions, which are arranged in rows transversely to the flow direction and in Angle to each other are arranged - they form so-called winglet pairs.
  • a similar flat tube was known from EP 1 061 319 B1, also usable for a motor vehicle radiator.
  • a flat tube equipped with turbulators is designed as a multi-chamber tube, d. H. Has at least two chambers which are separated from each other by a partition wall.
  • the turbulators are preferably arranged on both flat sides of the flat tube in each chamber.
  • the partitions may advantageously be formed as a web, fold or beads, and the flat tubes are advantageously longitudinal seam welded or soldered by means of a fold.
  • the turbulators may have any shapes, ie be elongated or round or angular, ie knob-shaped or truncated pyramid, as is already known from the prior art.
  • the turbulators extend into the interior of the pipe only so far that a clear channel height is maintained for an undisturbed core flow. This provides the advantage that on the one hand the heat transfer improves, but the pressure drop is not excessively increased.
  • the turbulators are preferably arranged only on the flat areas of the longitudinal sides and preferably designed as so-called winglets, which represent an optimum between heat transfer and pressure drop.
  • a flat strip is used as the starting material, which preferably consists of aluminum and is solder-plated on both sides; it is fed to a tube forming machine, which converts the flat strip into flat tubes in a continuous process.
  • folds are placed on the longitudinal edges, d. H. Edges about folded at right angles.
  • the turbulators are formed, in a single or multi-stage, preferably two-stage process, d. H. first by advancing a preform and then stamping a final shape.
  • a two- or multi-chamber tube is produced, in which the partition or the partitions are formed by beads.
  • the turbulators are first formed again in the flat band, preferably in a two-stage process, and then beads are formed between the turbulators.
  • head radii are formed on the longitudinal edges, and the tube is closed so that the beads and the head radii abut each other, wherein the head radii are preferably brought together in a butt joint, which is longitudinally welded.
  • the beads solder - when soldering a heat exchanger block - and thus form tie rods and one or more dense partitions.
  • a folding tube is produced by a similar method, which in turn starts from a flat strip and initially forms at least one web which is formed in one or more forming steps out of the flat strip. On both sides of the bridge or the webs are then the turbulators in formed the ribbon, then head radii are formed on the longitudinal edges, which are finally combined to form a butt joint, which is preferably longitudinally welded. The bridge soldered to the opposite flat side.
  • the head radii are shaped such that when closing the flat tube forms a lap joint or edge-side fold, which can be soldered. This eliminates the welding process.
  • the turbulators are produced in a continuous process, d. H. by rolling, wherein the flat strip is passed through a pair of rollers, which has the shape of the turbulators as a die and male.
  • the flat tube is used for a motor vehicle heat exchanger, in particular a coolant radiator, which has a brazed block, which consists of flat tubes and corrugated fins.
  • a coolant radiator which has a brazed block, which consists of flat tubes and corrugated fins.
  • the flat soldered on both sides flat tube can be easily soldered to the corrugated ribs in a block.
  • the high degree of slenderness of the flat tube ensures a low air-side pressure drop, on the other hand is given by the partitions in the form of webs, folds or beads the required internal pressure resistance, which is adapted to the prevailing in a coolant circuit pressures.
  • the heat transfer of the coolant in the tube is improved, d. H. the cooling capacity of the radiator is increased without the pressure drop, d. H. the pump capacity increases considerably. This is a lighter and more powerful cooler for motor vehicles to produce.
  • Fig. 1 shows a schematic representation of a cross section through a flat tube, which is designed as a so-called folding tube with a fold 2 arranged in the middle, which divides the flat tube 1 into two chambers 3, 4.
  • the cross section of the flat tube 1 is composed of two flat sides 1a, 1b and two rounded narrow sides 1 c, 1 d together.
  • dashed contours 5a, 5b, 5c, 5d are shown by turbulators. Between each turbulators 5 a, 5 c and 5 b, 5 d, a clear channel height h is left, which is free of turbulators.
  • the turbulators 5a, 5b, 5c, 5d are vortex generators, which are formed as projecting into the interior of the flat tube indentations and through the prior art, in particular the DE 101 27 084 A1 of the applicant, known per se.
  • the folding tube 1 is preferably made of a double-sided solder-plated aluminum sheet, a so-called flat strip or tube tape and soldered in the region of the middle fold 2. A method of manufacturing the folding tube 1 will be described below.
  • FIG. 2 shows a two-chamber tube designed as a folding tube 6 with a central partition wall 7, which is designed as a web.
  • Identical parts are here designated by the same reference numbers as in FIG. 1, ie the flat sides 1a, 1b and the rounded narrow sides 1c, 1d; as well as the chambers 3, 4 and the dashed lines contours 5a, 5b, 5c, 5d for the turbulators, which extend within a chamber 3, 4 over a width b, which is part of the flat sides 1a, 1b.
  • the section b ends so on the one hand in front of the central web 7 and on the other hand before the rounding of the narrow sides 1c, 1d.
  • the folding tube 2 is closed by a fold 8, which is arranged in the region of the narrow side 1 c - in this area, the edges of the flat band curved to form radii and form the solderable fold 8.
  • the production of the folding tube 6 will be explained below.
  • Fig. 3 shows a so-called bead tube 9 formed two-chamber tube, which is welded in the region of a narrow side 1c by a longitudinal seam 10.
  • the same reference numerals as in Fig. 1 are used for the same parts.
  • beads 11, 12 are formed, which form a partition by soldering and divide the tube into two chambers 3, 4.
  • the turbulators formed as impressions in the flat sides 1a, 1b are indicated by dashed lines 5a, 5b, 5c, 5d.
  • a manufacture of the welded bead pipe 9 will be described below.
  • FIG. 4 shows a two-chamber tube designed as a welded bar tube 13, which has a central web 14 and a weld seam 15 indicated in the region of the narrow side 1 c. Otherwise, the two-chamber tube 13 corresponds to those of the previous embodiments and contributes for same parts the same reference numbers. A method of manufacturing the welded bar tube 13 will be explained below.
  • flat tubes are also possible with a plurality of partitions formed as a fold, web and / or beads, d. H. with more than two chambers.
  • FIGS. 5a to 5f show individual method steps for producing a middle web seaming seam, as shown in FIG.
  • the starting material for the production of the finished flat tube is a flat strip made of aluminum, which is solder-plated on both sides and is continuously fed to a machine, not shown, for tube production.
  • 5a shows a flat strip 16 which, after a first method step, has folds 17, 18 set up at right angles at its longitudinal edges, which takes place by single-stage or multi-stage roll forming by the machine (not shown).
  • preforms 19 are preferred by turbulators in a first stage, ie formed from the flat strip 16.
  • a second stage shown in Fig.
  • FIG. 5e shows the flat band 16 with almost finished bent head radii 23, 24, between which the continuous underside of the tube to be manufactured is arranged.
  • Fig. 5f finally shows the finished, closed folding tube 25, in which the two folds 17, 18 come to lie parallel to each other and in the middle.
  • the folding tube 25 will later, z. B. in the manufacture of a block, not shown for a Heat exchanger soldered and is therefore tight.
  • the fold 17, 18 acts as a tie rod.
  • FIGS. 6a to 6f show in individual process steps the production of a folding tube, as shown in FIG. 2, ie with a fold arranged laterally in the region of the narrow side.
  • 6a shows a flat strip 26 after a first method step in which a web 27 has been formed, ie the flat strip 26 is formed in the region of the web 27, which can take place in several stages.
  • FIG. 6b shows the flat strip 26 after a further method step, in which - also in several stages - head radii 28, 29 have been formed on both longitudinal edges.
  • a next method step - shown in Fig. 6c - turbulators are preferred, ie it is a preform 30, which is formed nub-shaped or conical, produced in a first deformation stage.
  • a further method step - shown in Fig. 6d - the final shape of the turbulators 31 is produced by counter-stamping.
  • a next method step - shown in Fig. 6e - the flat strip 26 is closed to a tube, that is bent in the region of the center line m to a radius 32, which forms the later narrow side of the tube.
  • Fig. 6f shows the finished, ie closed web tube 33, in which the two head radii 28, 29 overlap over a range of about 180 degrees, which is soldered later.
  • the flat tube 33 is sealed and obtained by the soldering of the web 27 with the opposite side and a tie rod.
  • the turbulators 31 protrude inwards into the two flow channels of the two-chamber tube 33.
  • FIGS. 7a to 7f show, in several process steps, the production of a welded bead tube, as shown in FIG.
  • Starting material in turn is a flat band 34, from which in a first method step - shown in Fig. 7a - preforms 35 of the turbulators are made, in four groups, between which, symmetrical to a center line m, leave clearances with flat areas of the flat belt 34 are.
  • FIG. 7b shows the flat strip after the next method step, namely the counterstamping, which brings the turbulators 36 into their final shape.
  • the next method step is to form two beads 37, 38 in the flat strip 34 symmetrically to the center line m, which are shown in FIG. 7c.
  • Fig. 7e shows the closing of the tube, wherein in the region of the center line m a radius 41 is bent.
  • 7f shows the closed bead tube 42.
  • Both tube halves are brought together so that the head radii 39, 40 butt against each other and form a butt joint, which is closed by a longitudinal weld seam 43.
  • the two beads 37, 38 are directly opposite each other, but do not touch each other in the drawing.
  • the beading combs are later contacted during leveling and soldering of the bead pipes.
  • FIGS. 8a to 8f show, in individual process steps, the production of a welded bar tube, as shown in FIG.
  • the starting material in turn is a flat band 44, in which first a web 45, preferably in several stages is formed - shown in Fig. 8a.
  • the web 45 is arranged eccentrically to the center line m and in the middle of half the bandwidth.
  • Fig. 8b shows preforms 46 for the turbulators made by overriding. Subsequently, the turbulators 47 are brought into their final shape by countermolding.
  • FIG. 8d shows the shaping of head radii 48, 49 on the edge sides of the flat strip 44.
  • FIG. 8e shows the "pipe closing" step, wherein a radius 50 is bent into the flat strip 44 in the region of the center line m.
  • FIG. 8f shows the finished web tube 51, which is closed by a weld seam 52 in the region of the head blanks 48, 49 which are guided towards each other in a blunt manner.
  • the web 45 does not contact the opposite side of the tube 51 yet, since this flat side is still spherical. It is leveled later, then contacted the web 45 with its web back the opposite side and is soldered to this.
  • a pipe belt 53 is fed to a pair of rollers 54, 55 and, after passing through the pair of rollers, receives the desired embossing of the turbulators.
  • the upper roller 54 distributed on the circumference arranged projections (male) 54a, while the lower roller 55 corresponding depressions (matrices) 55a, also distributed over the circumference.
  • the pipe band 53 is thus pressed by the elevations 54a in the recesses 55a.
  • FIG. 10 shows a detail of a pipe band 56 into which turbulators 57, 58 are formed according to the method described above with reference to FIG. 9.
  • Both turbulators 57, 58 are formed as elongated shapes and V-shaped to each other, they form a so-called winglet pair, as is known from the aforementioned DE 101 27 084 A1 of the Applicant.
  • the flow direction of the flow medium within the flat tube, that is, for example, a coolant is represented by an arrow S.
  • a laterally arranged section AA shows the inwardly (into the tube interior) directed, approximately trapezoidal profile of the winglets 57, 58th
  • FIG. 11 shows a further section of a pipe band 59 with a turbulator 60, which has the shape of a truncated pyramid and is shaped out of the pipe band 59.
  • An adjacent section BB shows the profile of the turbulator 60.
  • FIG. 12 shows a detail of a pipe band 61 with a further embodiment for a turbulator 62 which is of frusto-conical shape.
  • a section CC shows the profile of the turbulator 62.
  • the flat tubes described above are preferably used for heat exchangers in motor vehicles, in particular coolant radiator.
  • the latter have a soldered block, which consists of flat tubes and arranged between them corrugated fins.
  • the flat tubes are thus flowed through by the coolant of a cooling circuit of an internal combustion engine of the motor vehicle, while the corrugated fins of ambient air be overflowed.
  • the joining of flat tubes and corrugated ribs to a block is carried out by a so-called Kassettierrea, in which the flat tubes are compressed by a suitable clamping device together with the corrugated fins to block size.
  • Preferred dimensions of the flat tubes according to the invention for a coolant radiator are tube depths between 20 and 50 mm, preferably 40 mm, tube widths between 1.5 and 2 mm and wall thicknesses between 0.15 and 0.35 mm, preferably between 0.2 and 0.25 mm ,

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP05014942.6A 2004-08-24 2005-07-11 Tube plat pour echangeur de chaleur, en particulier pour véhicules et méthode de production Active EP1630513B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004041101A DE102004041101A1 (de) 2004-08-24 2004-08-24 Flachrohr für einen Wärmeübertrager, insbesondere für Kraftfahrzeuge und Verfahren zur Herstellung eines Flachrohres

Publications (3)

Publication Number Publication Date
EP1630513A2 true EP1630513A2 (fr) 2006-03-01
EP1630513A3 EP1630513A3 (fr) 2008-04-16
EP1630513B1 EP1630513B1 (fr) 2017-06-14

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EP05014942.6A Active EP1630513B1 (fr) 2004-08-24 2005-07-11 Tube plat pour echangeur de chaleur, en particulier pour véhicules et méthode de production

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EP (1) EP1630513B1 (fr)
DE (1) DE102004041101A1 (fr)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
ES2288403A1 (es) * 2006-04-05 2008-01-01 Valeo Termico S.A. Procedimiento de fabricacion de un tubo para la conduccion de un fluido de un intercambiador de calor, y tubo obtenido mediante dicho procedimiento.
EP1878989A2 (fr) * 2006-07-06 2008-01-16 Behr GmbH & Co. KG Tube aplati pour échangeur de chaleur et échangeur de chaleur à tubes aplatis
CN109564068A (zh) * 2016-09-09 2019-04-02 庆东纳碧安株式会社 用于管体型热交换器的管道组件及包括此的管体型热交换器
CN114919160A (zh) * 2022-04-14 2022-08-19 湖北兴欣科技股份有限公司 钢塑复合螺旋波纹管成型流水线

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DE102019211341A1 (de) * 2019-07-30 2021-02-04 Mahle International Gmbh Wärmeübertrager
DE102020207067A1 (de) 2020-06-05 2021-12-09 Mahle International Gmbh Flachrohr und Wärmeübertrager mit einem Flachrohr

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EP0457470B1 (fr) 1990-05-11 1996-01-03 Showa Aluminum Kabushiki Kaisha Tube pour échangeurs de chaleur et méthode de fabrication du tube
DE10127084A1 (de) 2000-06-17 2002-03-28 Behr Gmbh & Co Wärmeübertrager, insbesondere für Kraftfahrzeuge
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EP1630513B1 (fr) 2017-06-14
EP1630513A3 (fr) 2008-04-16

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