DE19515909A1 - Brazed heat exchanger mfr. - Google Patents

Brazed heat exchanger mfr.

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Publication number
DE19515909A1
DE19515909A1 DE19515909A DE19515909A DE19515909A1 DE 19515909 A1 DE19515909 A1 DE 19515909A1 DE 19515909 A DE19515909 A DE 19515909A DE 19515909 A DE19515909 A DE 19515909A DE 19515909 A1 DE19515909 A1 DE 19515909A1
Authority
DE
Germany
Prior art keywords
flux
zinc
heat exchanger
extruded
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
DE19515909A
Other languages
German (de)
Other versions
DE19515909C2 (en
Inventor
Karl-Heinz Dipl Ing Staffa
Torsten Dipl Ing Waldhelm
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
Mahle 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.)
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Publication date
Application filed by Behr GmbH and Co KG, Mahle Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Priority to DE19515909A priority Critical patent/DE19515909C2/en
Publication of DE19515909A1 publication Critical patent/DE19515909A1/en
Application granted granted Critical
Publication of DE19515909C2 publication Critical patent/DE19515909C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
    • B23K1/203—Fluxing, i.e. applying flux onto surfaces
    • 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
    • F28D1/04—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 tubular conduits
    • F28D1/053—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 tubular conduits the conduits being straight
    • F28D1/0535—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 tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof

Abstract

Brazed heat exchangers are mfd. from Al tubes, coated electrolytically or by spraying with Zn and flux in a single operation. The tubes are assembled with other components, either Zn-coated or uncoated, and the assembly is brazed together. Pref. the flux specified for the 'Nocolok' process is used. Also claimed is a heat exchanger consisting of extruded Al tubes (1) with corrugated fin strips (2) between adjacent tubes, and with at least one header (4) of non-braze-coated material and/or extruded material and/or an extruded section.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von hartgelöteten Wärmetauschern, bei dem extrudierte Aluminium­ teile, insbesondere Aluminiumrohre galvanisch oder durch ein Spritzverfahren mit einer Zinkschicht und einem Flußmittel versehen werden, ehe sie zusammen mit anderen, nicht verzink­ ten oder verzinkten Teilen zusammengesetzt und verlötet wer­ den. Die Erfindung betrifft auch einen nach diesem Verfahren hergestellten Wärmetauscher.The invention relates to a method for producing brazed heat exchangers in the extruded aluminum parts, in particular aluminum pipes galvanically or by one Spraying process with a zinc layer and a flux be provided before they together with others, not galvanized ten or galvanized parts assembled and soldered the. The invention also relates to one using this method manufactured heat exchanger.

Es ist bekannt (SAE Technical Paper Series Nr. 930152; Morley und Syslak "Zink Brazing of Automotive Aluminum Heat Exchan­ gers", International Congress and Exposition Detroit, Michi­ gan, USA, 01.-05.03.1993) Wärmetauscher aus Mehrkammeralumi­ niumrohren mit jeweils zwischen benachbarten Rohren angeord­ neten Wellrippen herzustellen, bei dem die Aluminiumrohre mit einer Zinkschicht versehen waren, die mit einer Flußmittel­ schicht versehen wurden und dann mit nicht verzinkten Well­ rippen durch einen Lötvorgang, bei dem kurzfristig eine Tem­ peratur von 600°C erreicht wird, fest miteinander verlötet werden konnten. Diese so behandelten Aluminiumrohre sind auch mit Sammelkästen an beiden Enden versehen worden, so daß ein für die Funktion geeigneter Wärmetauscher vorlag. It is known (SAE Technical Paper Series No. 930152; Morley and Syslak "Zink Brazing of Automotive Aluminum Heat Exchan gers ", Detroit International Congress and Exposition, Michi gan, USA, 01.-05.03.1993) heat exchanger made of multi-chamber aluminum nium tubes each arranged between adjacent tubes Neten corrugated fins to manufacture, in which the aluminum tubes with were provided with a layer of zinc with a flux layer and then with non-galvanized well rip through a soldering process in which a tem temperature of 600 ° C is reached, soldered together could become. These aluminum tubes treated in this way are also have been provided with collecting boxes at both ends, so that a suitable heat exchanger was available.  

Bei diesem bekannten Verfahren, bei dem man auf die sonst üb­ liche Lötplatierung der später zu verlötenden Teile verzich­ ten kann, muß das Flußmittel in einem gesonderten Arbeitsgang auf die verzinkten Aluminiumrohre aufgebracht und anschlie­ ßend sorgfältig getrocknet werden. Dies ist, obwohl das Zinklöten Vorteile gegenüber dem üblichen Löten hat, verhält­ nismäßig aufwendig.In this known method, in which one otherwise on the usual no soldering plating of the parts to be soldered later can, the flux must be in a separate operation applied to the galvanized aluminum pipes and then be dried carefully. This is, although that Zinc soldering has advantages over conventional soldering behaves expensive.

Der Erfindung liegt die Aufgabe zugrunde, das eingangs ge­ nannte Lötverfahren zu vereinfachen. Die Erfindung besteht bei einem Verfahren der eingangs genannten Art darin, daß das Flußmittel zusammen mit dem Zink in einem Arbeitsgang auf die Teile aufgebracht wird. Durch diese Maßnahme ist das geson­ derte Befluxen der zu verbindenden Teile und ein gesonderter Trocknungsvorgang nicht mehr erforderlich. Das Flußmittel kann in einfacher Weise, beispielsweise einem Zinkbad, beige­ mischt werden, in welches die zu verzinkenden Aluminiumteile getaucht und auf galvanischem Wege mit der Zinkschicht verse­ hen werden. Es hat sich gezeigt, daß sich bei diesem Vorgang auch das Flußmittel auf die zu verzinkenden Teile aufbringen läßt und daß es beim Lötvorgang in der gewünschten Weise wirksam wird.The invention is based on the object, the ge to simplify the soldering process. The invention exists in a method of the type mentioned in that the Flux together with the zinc in one operation on the Parts is applied. This measure is special frequent fluxing of the parts to be connected and a separate one Drying process no longer required. The flux can be beige in a simple manner, for example a zinc bath are mixed into which the aluminum parts to be galvanized dipped and galvanically coated with the zinc layer will be. It has been shown that this process also apply the flux to the parts to be galvanized lets and that it is in the desired manner during the soldering process takes effect.

Das Zinkbad kann zum einen dazu verwendet werden, die Alumi­ niumteile galvanisch zu verzinken, es kann aber auch dazu dienen, das Material für die Durchführung eines Spritzverfah­ rens zu liefern, mit dem Zink und Flußmittel auf die Teile aufgesprüht werden. Auch in diesem Fall kann das Flußmittel beim späteren Lötvorgang wirksam werden.The zinc bath can be used on the one hand, the Alumi galvanizing nium parts, but it can also do so serve the material for carrying out a spraying process rens to deliver, with the zinc and flux on the parts be sprayed on. In this case too, the flux can become effective during the later soldering process.

Es hat sich auch gezeigt, daß mit dem neuen Verfahren ein Wärmetauscher hergestellt werden kann, der aus extrudierten Aluminiumrohren mit zwischen benachbarten Rohren angeordneten Wellrippen besteht und der mit mindestens einem einem der Rohrenden zugeordneten Sammler versehen ist und bei dem der Sammler aus einem nicht lotplattierten Material und/oder aus einem extrudierten Profil besteht, das sich in der üblichen Weise nicht lotplatieren läßt. In überraschender Weise kann die Zinkverlötung auch zwischen den mit der Zinkschicht und der Flußmittelschicht versehenen Aluminiumrohren und dem Sammler durchgeführt werden, ohne daß besondere zusätzliche Maßnahme getroffen werden müssen. Ein solcher Wärmetauscher macht ein Befluxen und ein anschließendes Trocknen nicht not­ wendig. Es entstehen daher auch keine schädlichen Abgase. Weil die Oberfläche, auch des Sammlers, nicht mit Flußmittel beaufschlagt zu werden braucht, entsteht ein besserer Kon­ denswasserablauf. Die Teile sind auch besser lackierbar und es können die kostengünstigen stranggepreßten Profile verwen­ det werden, die, da sie nicht plattiert sind, korrosionsresi­ stent sind.It has also been shown that using the new method Heat exchanger can be made from extruded Aluminum tubes arranged between adjacent tubes Corrugated ribs exist and that with at least one of the Pipe ends assigned collector is provided and in which the Collector made of a non-solder-clad material and / or  an extruded profile, which is in the usual Way does not solder plating. Surprisingly, can the zinc soldering also between those with the zinc layer and the flux-coated aluminum tubes and the Collectors can be carried out without any special additional Measure must be taken. Such a heat exchanger does not require fluxing and subsequent drying agile. There are therefore no harmful emissions. Because the surface, including the collector, is not fluxed needs to be acted on, a better Kon arises drainage. The parts are also easier to paint and it can use the inexpensive extruded profiles which, since they are not plated, are corrosion-resistant are stent.

In der Zeichnung sind zwei Ausführungsbeispiele eines nach dem neuen Verfahren hergestellten Wärmetauschers gezeigt, die anschließend beschrieben werden. Es zeigenIn the drawing, two embodiments are one after shown the new process manufactured heat exchanger are then described. Show it

Fig. 1 einen Teil eines nach der Erfindung hergestellten Wärmetauschers mit einem Sammelrohr mit Kreisquer­ schnitt und Fig. 1 shows a part of a heat exchanger made according to the invention with a manifold with circular cross section

Fig. 2 einen Ausschnitt eines Wärmetauschers ähnlich Fig. 1, jedoch mit einem Sammelrohr mit nicht kreisför­ migen Querschnitt. Fig. 2 shows a section of a heat exchanger similar to FIG. 1, but with a manifold with a non-circular cross-section.

In der Fig. 1 ist ein Teil eines Wärmetauschers gezeigt, der mehrere, mit ihren größeren Seitenflächen parallel zueinander ausgerichtete Mehrkammerrohre (1) aufweist, die jeweils aus Aluminium bestehen und nach dem vorher geschilderten Verfah­ ren entweder galvanisch oder durch ein Sprühverfahren mit ei­ ner Zinkschicht in der Größenordnung von etwa 2 bis 6 µ verse­ hen wurden. Sowohl beim galvanischen Verzinken als auch für das Sprühverfahren wird dabei eine Mischung aus Zink und Flußmittel verwendet, wobei für das galvanische Verzinken das Flußmittel in etwa einer Menge dem Zinkbad beigemengt wird, die der bei der üblichen Befluxung erforderlichen Flußmittel­ menge entspricht. Ebenso ist dies der Fall bei der Aufberei­ tung des flüssigen Ausgangsmaterials für ein Sprühverfahren. Die extrudierten Mehrkammeraluminiumrohre sind daher mit ei­ ner Zinkschicht versehen, die Flußmittel enthält.In Fig. 1 a part of a heat exchanger is shown, which has several, with their larger side surfaces aligned parallel to each other multi-chamber tubes ( 1 ), each made of aluminum and ren after the above-described process either galvanically or by a spraying process with a zinc layer in the order of about 2 to 6 µ verse hen. Both in galvanizing and for the spraying process, a mixture of zinc and flux is used, with the flux being added to the zinc bath in approximately an amount for the galvanizing, which corresponds to the amount of flux required for the usual fluxing. This is also the case with the preparation of the liquid starting material for a spraying process. The extruded multi-chamber aluminum tubes are therefore provided with a zinc layer that contains flux.

Zwischen jeweils zwei benachbarten Aluminiumrohren (1) sind Wellrippenstreifen (2) vorgesehen, deren Kämme die Seitenwän­ de der Aluminiumrohre (1) berühren. Alle Aluminiumrohre, die als Flachrohre ausgebildet sind, stecken in Schlitzen (3) ei­ nes Sammelrohres (4) mit Kreisquerschnitt, das ebenfalls aus Aluminium besteht, aber nicht vorbehandelt ist, also auch nicht lotplattiert ist. Als Flußmittel kann ein Flußmittel verwendet werden, wie es auch für das bekannte Nocoloklötver­ fahren eingesetzt wird.Between each two adjacent aluminum tubes ( 1 ) corrugated rib strips ( 2 ) are provided, the crests of which touch the side walls of the aluminum tubes ( 1 ). All aluminum tubes, which are designed as flat tubes, are inserted into slots ( 3 ) in a collecting tube ( 4 ) with a circular cross-section, which is also made of aluminum, but is not pretreated, so it is also not solder-plated. A flux can be used as a flux, as is also used for the known Nocoloklötver method.

Der so vorbereitete Wärmetauscher kann in einem Lötofen ins­ gesamt verlötet werden, wobei in bekannter Weise kurzfristig eine Temperatur von etwa 600°C erreicht wird. Die Aluminium­ rohre (1) verbinden sich bei diesem Lötvorgang, bei dem Zink in benachbarte Metallschichten diffundiert, sowohl mit den Wellrippenstreifen (2) als auch mit dem Sammelrohr (4). Bei diesem Lötvorgang kann daher der sonst notwendige Vorgang des Aufbringens von Flußmittel gespart werden.The heat exchanger prepared in this way can be soldered overall in a soldering furnace, a temperature of about 600 ° C. being reached briefly in a known manner. The aluminum tubes ( 1 ) connect in this soldering process, in which zinc diffuses into adjacent metal layers, both with the corrugated fin strips ( 2 ) and with the header tube ( 4 ). With this soldering process, the otherwise necessary process of applying flux can be saved.

Die Fig. 2 zeigt einen Wärmetauscher ähnlich Fig. 1. Gleiche Teile sind daher auch mit gleichen Bezugszeichen versehen worden. Unterschiedlich ist hier, daß der Sammler (4′) keinen Kreisquerschnitt aufweist, sondern eine flache, mit den Schlitzen (3) versehenen Bodenfläche und im übrigen einen et­ wa halbrunden Querschnitt besitzt. Dieser Sammler (4′) kann beispielsweise aus stranggepreßten unbehandeltem Aluminium bestehen. Möglich wäre es auch, dem Sammler (4′) einen recht­ eckigen Querschnitt zu geben, wie gestrichelt angedeutet ist. FIG. 2 shows a heat exchanger similar to FIG. 1. The same parts have therefore been given the same reference numerals. The difference here is that the collector ( 4 ') has no circular cross section, but a flat, with the slots ( 3 ) provided bottom surface and otherwise has a semi-circular cross section. This collector ( 4 ') can for example consist of extruded untreated aluminum. It would also be possible to give the collector ( 4 ') a rectangular cross-section, as indicated by dashed lines.

Claims (7)

1. Verfahren zur Herstellung von hartgelöteten Wärmetau­ schern, bei dem extrudierte Aluminiumteile, insbeson­ dere Aluminiumrohre galvanisch oder durch ein Spritz­ verfahren mit einer Zinkschicht und einem Flußmittel versehen werden, ehe sie zusammen mit anderen, nicht verzinkten oder verzinkten Teilen zusammengesetzt und verlötet werden, dadurch gekennzeichnet, daß das Flußmittel mit dem Zink zusammen in einem Arbeitsgang auf die Teile aufgebracht wird.1. A process for the production of brazed Wärmetau exchangers are galvanically or process by an injection with the extruded aluminum components, in particular aluminum tubes provided with a zinc layer and a flux before, not zinc-plated along with other or composite galvanized parts and are soldered, characterized characterized in that the flux is applied to the parts together with the zinc in one operation. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Flußmittel einem Zinkbad beigemischt wird.2. The method according to claim 1, characterized in that that the flux is added to a zinc bath. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Aluminiumteile in dem Zinkbad galvanisch mit der Zinkschicht versehen werden, die Flußmittel ent­ hält.3. The method according to claim 2, characterized in that that the aluminum parts in the zinc bath galvanically with the zinc layer are provided, the flux ent holds. 4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß dem Zinkbad das Material für die Durchführung des Spritzverfahrens entnommen wird.4. The method according to claim 2, characterized in that the zinc bath is the material for carrying out the Spraying process is removed. 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Flußmittel das für das "Nocolok"-Verfahren benötigte Flußmittel verwendet wird.5. The method according to claim 1, characterized in that as a flux that for the "Nocolok" process required flux is used. 6. Wärmetauscher der nach Anspruch 1 hergestellt ist, bestehend aus extrudierten Aluminiumrohren (1) mit zwischen benachbarten Rohren angeordneten Wellrippen­ streifen (2) und mit mindestens einem einen der Roh­ renden zugeordneten Sammler (4, 4′), dadurch gekenn­ zeichnet, daß der Sammler (4, 4′) aus einem nicht lotplatierten Material und/oder aus einem extrudier­ ten Material und/oder aus einem extrudierten Profil besteht.6. Heat exchanger which is made according to claim 1, consisting of extruded aluminum tubes ( 1 ) with corrugated fins arranged between adjacent tubes strips ( 2 ) and with at least one of the raw rendering associated collector ( 4 , 4 '), characterized in that Collector ( 4 , 4 ') consists of a non-solder-plated material and / or of an extruded material and / or of an extruded profile. 7. Wärmetauscher nach Anspruch 6, dadurch gekennzeich­ net, daß der Sammler (4′) aus einem stranggepreßten Profil besteht.7. Heat exchanger according to claim 6, characterized in that the collector ( 4 ') consists of an extruded profile.
DE19515909A 1995-04-29 1995-04-29 Zinc brazing process for the production of brazed heat exchangers Expired - Fee Related DE19515909C2 (en)

Priority Applications (1)

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DE19515909A DE19515909C2 (en) 1995-04-29 1995-04-29 Zinc brazing process for the production of brazed heat exchangers

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DE19515909A DE19515909C2 (en) 1995-04-29 1995-04-29 Zinc brazing process for the production of brazed heat exchangers

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DE19515909A1 true DE19515909A1 (en) 1996-10-31
DE19515909C2 DE19515909C2 (en) 2001-07-19

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Cited By (8)

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DE19922673C1 (en) * 1999-05-18 2000-08-31 Erbsloeh Ag Heat exchanger for automobiles in extruded aluminum uses impressed barrier in profile tube to guard against solder migration away from join.
EP1724372A1 (en) * 2005-05-17 2006-11-22 Mitsubishi Aluminum Kabushiki Kaisha Extruded multi-path flat tubes of aluminium alloy for heat exchanger and method of manufacture thereof
WO2007012434A1 (en) * 2005-07-27 2007-02-01 Behr Gmbh & Co. Kg Surface to be soldered
US7755185B2 (en) 2006-09-29 2010-07-13 Infineon Technologies Ag Arrangement for cooling a power semiconductor module
US7829151B2 (en) 2003-03-31 2010-11-09 Behr Gmbh & Co. Kg Method for producing pieces having a modified surface
CN110465716A (en) * 2018-05-10 2019-11-19 沈阳华铁异型材有限公司 Technique is preliminarily sprayed in a kind of heat radiator of internal-combustion engine core part
CN112809118A (en) * 2021-01-15 2021-05-18 西安嘉和华亨热系统有限公司 Method for coating brazing layer of aluminum part of automobile product
DE102008009695B4 (en) 2007-03-02 2023-10-12 Mahle International Gmbh Workpiece

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DE10215901A1 (en) * 2002-04-11 2003-11-06 Grillo Werke Ag Heat exchangers and flat solar thermal collector modules comprise support panels made of zinc, copper or aluminum, and capillary tubes made of a different material that is impossible or difficult to solder
DE102014011745B4 (en) 2014-08-07 2023-05-11 Modine Manufacturing Company Brazed heat exchanger and method of manufacture

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US6687995B1 (en) 1999-05-18 2004-02-10 Erbslöh Ag Heat exchanger and method for producing a heat exchanger
DE19922673C1 (en) * 1999-05-18 2000-08-31 Erbsloeh Ag Heat exchanger for automobiles in extruded aluminum uses impressed barrier in profile tube to guard against solder migration away from join.
CZ303129B6 (en) * 1999-05-18 2012-04-18 Erbslöh Ag Heat exchanger and process for producing the heat exchanger
US7829151B2 (en) 2003-03-31 2010-11-09 Behr Gmbh & Co. Kg Method for producing pieces having a modified surface
US9677166B2 (en) 2003-03-31 2017-06-13 Mahle International Gmbh Method for producing pieces having a modified surface
EP1724372A1 (en) * 2005-05-17 2006-11-22 Mitsubishi Aluminum Kabushiki Kaisha Extruded multi-path flat tubes of aluminium alloy for heat exchanger and method of manufacture thereof
US7588073B2 (en) 2005-05-17 2009-09-15 Mitsubishi Aluminum Kabushiki Kaisha Aluminum alloy-based extruded multi-path flat tubes for the heat exchanger and method of manufacture thereof
WO2007012434A1 (en) * 2005-07-27 2007-02-01 Behr Gmbh & Co. Kg Surface to be soldered
US7755185B2 (en) 2006-09-29 2010-07-13 Infineon Technologies Ag Arrangement for cooling a power semiconductor module
DE102008009695B4 (en) 2007-03-02 2023-10-12 Mahle International Gmbh Workpiece
CN110465716A (en) * 2018-05-10 2019-11-19 沈阳华铁异型材有限公司 Technique is preliminarily sprayed in a kind of heat radiator of internal-combustion engine core part
CN112809118A (en) * 2021-01-15 2021-05-18 西安嘉和华亨热系统有限公司 Method for coating brazing layer of aluminum part of automobile product

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