EP0110311B1 - Flat heat exchange plate and method of making it - Google Patents

Flat heat exchange plate and method of making it Download PDF

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Publication number
EP0110311B1
EP0110311B1 EP83111716A EP83111716A EP0110311B1 EP 0110311 B1 EP0110311 B1 EP 0110311B1 EP 83111716 A EP83111716 A EP 83111716A EP 83111716 A EP83111716 A EP 83111716A EP 0110311 B1 EP0110311 B1 EP 0110311B1
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EP
European Patent Office
Prior art keywords
metal
flat heat
plates
coat
exchange plate
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EP83111716A
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German (de)
French (fr)
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EP0110311A1 (en
Inventor
Manfred Dr.-Ing. Phys. Paulus
Norbert Dipl.-Ing. Frömel
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Fr Kammerer GmbH
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Fr Kammerer GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • F28F3/14—Elements constructed in the shape of a hollow panel, e.g. with channels by separating portions of a pair of joined sheets to form channels, e.g. by inflation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • B21D53/045—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal by inflating partially united plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49366—Sheet joined to sheet

Definitions

  • the invention relates to a flat heat exchanger plate with two closely spaced plates made of poorly or not cold-roll-plateable metal and at least one channel arranged between these plates for a flowing or to be heated or cooled liquid or gaseous medium.
  • the invention finds application in heat exchangers which are used in solar systems, for seawater desalination, in chemical process engineering and in food chemistry, and in particular wherever aggressive or corrosive media are involved as heat carriers.
  • Heat exchangers are used to transfer thermal energy between two liquid or gaseous media of different temperatures, which are either to be cooled or heated.
  • Flat heat exchangers consist of metal plates which have one or more channels for receiving a medium to be passed through them. Such flat heat exchanger plates are used as a stack of plates for compact heat exchangers or as a large single plate, for example for absorbing solar energy.
  • German Offenlegungsschrift 29 02 640 discloses a heat exchange element with two adjacent metal layers made of aluminum and a metal tube arranged between them for the heat transfer medium. Because of the lack of corrosion resistance of the aluminum, the metal tube is made of copper, which causes considerable manufacturing problems.
  • holes must be made in a metal block to accommodate a welding stop agent, which means that the areas of the holes do not weld during subsequent rolling, so that these can be expanded to form channels. The drilling of the holes is, however, quite complex and several additional operations are necessary to remove the welding stop agent, which is essential to prevent undesirable corrosion.
  • German patent 21 23 628 a plate-shaped heat exchanger is finally known, which is made of two strips of a plateable metal by pressure welding, and which has a longitudinal channel lying in the rolling direction. In the area of this later longitudinal channel, a layer is applied to one strip in the area of this later longitudinal channel, which counteracts the welding and enables the channel to be widened.
  • a flat heat exchanger produced in this way is relatively complex to manufacture and can only be produced from conventionally clad metals.
  • the object of the invention is to propose a flat heat exchanger plate or a method for producing such a plate, in which or in which plates consisting of a material which is poorly or not capable of being cold-rolled, can be connected to one another at the intended locations, so that channels are subsequently produced by compressed air can be expanded.
  • a flat heat exchanger plate of the type described above is assumed and the object is achieved in that an adhesive layer of an amorphous metal is provided between the two plates and close to the channel on both sides, and that the plates in the area of Adhesive layer are firmly connected to each other by cold rolling plating.
  • the production of such a flat heat exchanger plate in the cold roll plating process is very simple and metals can be used for the plates by means of the adhesive layer which could not previously be used.
  • the adhesive layer is expediently a film made of an amorphous metal; in their place, an amorphous surface layer can also be provided on at least one of the two plates.
  • the two plates advantageously consist of copper or a copper alloy.
  • the film forming the adhesive layer advantageously consists of an amorphous nickel, iron or copper alloy and contains crystallization-delaying components, primarily silicon, boron, phosphorus, aluminum and / or carbon.
  • each plate has a plated-on top layer, which - if this is a metal which cannot be plated with the plate - is produced according to the inventive concept using an adhesive layer made of amorphous metal.
  • the two cover layers of the plates consist of a metal which is resistant to aggressive and / or corrosive media, titanium or a titanium alloy or tantalum or a tantalum alloy being used as the metal for the cover layer; stainless chrome-nickel steel can also serve as metal for the cover layer.
  • the channels of the flat heat exchanger plate according to the invention take up the aggressive medium, then the two plates will carry their permanent cover layers on the inside, facing the channels, but if the aggressive medium flows on the outer surfaces of the flat heat exchanger plate, then the corrosion-resistant cover layers are on the outside and the two are mostly copper
  • plates are plated onto one another. The use of such a top layer leaves the most economical Use of the very expensive, corrosion-resistant metal too.
  • the adhesive layer is either a film made of amorphous metal or it is applied as a surface layer to at least one of the metal strips.
  • the adhesive layer can consist of strips arranged separately from one another and the strips can be arranged parallel and perpendicular to one another.
  • the adhesive layer advantageously consists of two comb-like strips which are arranged in a toothed manner, this allows the production of a flat heat exchanger plate with a meandering channel which only requires two connections.
  • a metal mesh can be introduced which carries plates made of amorphous metal at at least part of its crossing points.
  • a metal network With the help of such a metal network, the manufacture of a flat heat exchanger plate with multiple branched channels can be easily accomplished.
  • the plates are expediently placed in a die of appropriate shape.
  • the two plates 2 and 3 consist of a metal which is difficult or impossible to connect by a plating process.
  • an adhesive layer 6 is provided, which serves as an adhesion promoter and which is guided to the channels 4 and 5 up to both sides.
  • this adhesive layer 6 the two plates 2 and 3 are firmly connected to one another by cold roll cladding.
  • the adhesive layer 6 consists of an amorphous nickel, iron or copper alloy, which contains crystallization-delaying components, namely in particular silicon, boron, phosphorus, aluminum and / or carbon.
  • This adhesive layer 6 can be a film which is placed between the two plates 2 and 3 before the cold roll cladding, but it is also possible to produce the adhesive layer 6 by irradiating the surface of one of the two plates 2 and 3 with laser light.
  • the two plates 2 and 3 which are made of copper, for example, each carry a more or less thin cover layer 7 or 8, which is applied by cold rolling plating.
  • these cover layers 7, 8 face the adhesive layer 6 or the inside of the channels 4 and 5, but they can - if the application requires - also lie on the outside of the flat heat exchanger plate 1.
  • the two cover layers 7 and 8 consist of a metal which is resistant to aggressive and / or corrosive media, namely titanium or tantalum or a titanium or tantalum alloy.
  • the flat heat exchanger plate shown in Figure 2 is also composed of two plates 2 'and 3', which consist of copper and are connected to each other by cold rolling cladding with the interposition of an adhesive layer 6.
  • a meandering channel 9 is arranged between the two plates 2 ', 3'.
  • the production of the flat heat exchanger plate according to the invention takes place in that an adhesive layer made of an amorphous metal (for example a nickel, iron or copper) is first made at certain points between two metal strips which are unwound from supply rolls and are made of a material which is difficult or not to be plated, namely copper Alloy with crystallization retarding constituents) is introduced. These two metal strips are then joined together by a cold rolling plating process using a rotating pair of steel rollers under high pressure, the Connection only occurs at those points where the adhesive layer is located. The connected metal strips are then cut into individual plates, and finally the recessed, non-connected sections are widened in a conventional manner to form one or more channels for a medium to be heated or cooled.
  • an adhesive layer made of an amorphous metal for example a nickel, iron or copper
  • FIG. 3 shows an adhesive layer 6 made of an amorphous metal in the form of two comb-like strips 10 and 11 made of foils and arranged in an interlocking manner.
  • this adhesive layer 6 flat heat exchanger plates can be produced which have a meandering channel.
  • the dash-dotted line indicates the point at which the cut for cutting the plates is made after the cold rolling plating.
  • a metal mesh 12 for example made of a film, is used to produce flat heat exchanger plates, in which the two plates lying next to one another are only to be connected to one another at certain points to form multiply branched channels, as is shown in a top view in FIG.
  • This metal net 12 carries at a part of its bulging points 13 small, square plates 14, which consist of an amorphous metal. If such a metal net 12, which is preferably made from the metal of the strips, is inserted between the metal strips, which are difficult to plate or not, before the cold rolling cladding, then these are only connected to one another at certain points.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

PCT No. PCT/EP83/00313 Sec. 371 Date Jul. 26, 1984 Sec. 102(e) Date Jul. 26, 1984 PCT Filed Nov. 23, 1983 PCT Pub. No. WO84/02178 PCT Pub. Date Jun. 7, 1984.Heat exchanger panel and process of making such panel comprised of selectively clad or bonded metal plates made of a material which cannot be cold roll bonded without great difficulty, if at all, with at least one channel disposed therebetween. An adhesive layer of an amorphous metal is provided between the plates for permanently joining the plates together by cold roll bonding in the area of the adhesive layer.

Description

Die Erfindung bezieht sich auf eine Flachwärmetauscherplatte mit zwei dicht aneinander liegenden Platten aus einem schlecht oder nicht kaltwalzplattierbaren Metall und mindestens einem zwischen diesen Platten angeordneten Kanal für ein durchströmendes, zu erwärmendes oder abzukühlendes flüssiges bzw. gasförmiges Medium.The invention relates to a flat heat exchanger plate with two closely spaced plates made of poorly or not cold-roll-plateable metal and at least one channel arranged between these plates for a flowing or to be heated or cooled liquid or gaseous medium.

Die Erfindung findet Anwendung bei Wärmetauschern, die bei Solaranlagen,zur Meerwasserentsalzung, bei der chemischen Verfahrenstechnik und der Lebensmittelchemie eingesetzt werden und insbesondere überall dort, wo aggressive bzw. korrosive Medien als Wärmeträger beteiligt sind.The invention finds application in heat exchangers which are used in solar systems, for seawater desalination, in chemical process engineering and in food chemistry, and in particular wherever aggressive or corrosive media are involved as heat carriers.

Wärmetauscher dienen zur Übertragung thermischer Energie zwischen zwei flüssigen oder gasförmigen Medien unterschiedlicher Temperaturen, welche entweder gekühlt oder erhitzt werden sollen.Heat exchangers are used to transfer thermal energy between two liquid or gaseous media of different temperatures, which are either to be cooled or heated.

Flachwärmetauscher bestehen aus Metallplatten, welche einen oder mehrere Kanäle zur Aufnahme eines durch diese hindurchzuleitenden Mediums aufweisen. Solche Flachwärmetauscherplatten werden als Plattenstapel für kompakte Wärmetauscher oder auch als großflächige Einzelplatte beispielsweise zur Aufnahme von Sonnenenergie eingesetzt.Flat heat exchangers consist of metal plates which have one or more channels for receiving a medium to be passed through them. Such flat heat exchanger plates are used as a stack of plates for compact heat exchangers or as a large single plate, for example for absorbing solar energy.

Flachwärmetauscherplatten sind in verschiedenen Ausführungsformen bekannt. So offenbart die deutsche Offenlegungsschrift 29 02 640 ein Wärmetauschelement mit zwei aneinanderliegenden Metallagen aus Aluminium und einen dazwischen angeordneten Metallrohr für den Wärmeträger. Wegen der mangelnden Korrosionsbeständigkeit des Aluminiums besteht das Metallrohr aus Kupfer, was nicht unerhebliche Fertigungsprobleme nach sich zieht. Zur Herstellung der mit der deutschen Offenlegungsschrift 28 47 897 beschriebenen Wärmetauscherplatte müssen in einen Metallblock Bohrungen zur Aufnahme eines Schweiß-stoppmittels angebracht werden, was bewirkt, daß beim anschließenden Walzen die Bereiche der Bohrungen nicht verschweißen, sodaß sich diese zu Kanälen aufweiten lassen. Das Anbringen der Bohrungen ist jedoch recht aufwendig und für die Entfernung des Schweißstoppmittels-was zur Verhinderung von unerwünschten Korrosionen unumgänglich ist - sind mehrere zusätzliche Arbeitsgänge notwendig. Mit der Deutschen Patentschrift 21 23 628 ist schließlich ein plattenförmiger Wärmetauscher bekannt geworden, weicher aus zwei Streifen eines plattierbaren Metalles durch Preßschweißen hergestellt ist, und der einen in Walzrichtung liegenden Längskanal aufweist. Auf den einen Streifen wird im Bereich dieses späteren Längskanales vor dem Plattieren eine dem Ver-schweißen entgegenwirkende Schicht aufgebracht, welche das Aufweiten des Kanales ermöglicht. Ein solchermaßen hergestellter Flachwärmetauscher ist relativ aufwendig herstellbar und kann nur aus herkömmllch plattierbaren Metallen hergestellt werden. Aufgabe der Erfindung ist es, eine Flachwärmetauscherplatte bzw. ein Verfahren zur Herstellung einer derartigen platte vorzuschlagen, bei welcher bzw. bei welchem aus einem schlecht oder aus nicht kaltwalzplattierbarem Material bestehende platten an den vorgesehenen Stellen miteinander verbunden werden können, so daß anschließend Kanäle durch preßluft aufgeweitet werden können.Flat heat exchanger plates are known in various embodiments. For example, German Offenlegungsschrift 29 02 640 discloses a heat exchange element with two adjacent metal layers made of aluminum and a metal tube arranged between them for the heat transfer medium. Because of the lack of corrosion resistance of the aluminum, the metal tube is made of copper, which causes considerable manufacturing problems. To produce the heat exchanger plate described in German Offenlegungsschrift 28 47 897, holes must be made in a metal block to accommodate a welding stop agent, which means that the areas of the holes do not weld during subsequent rolling, so that these can be expanded to form channels. The drilling of the holes is, however, quite complex and several additional operations are necessary to remove the welding stop agent, which is essential to prevent undesirable corrosion. With the German patent 21 23 628 a plate-shaped heat exchanger is finally known, which is made of two strips of a plateable metal by pressure welding, and which has a longitudinal channel lying in the rolling direction. In the area of this later longitudinal channel, a layer is applied to one strip in the area of this later longitudinal channel, which counteracts the welding and enables the channel to be widened. A flat heat exchanger produced in this way is relatively complex to manufacture and can only be produced from conventionally clad metals. The object of the invention is to propose a flat heat exchanger plate or a method for producing such a plate, in which or in which plates consisting of a material which is poorly or not capable of being cold-rolled, can be connected to one another at the intended locations, so that channels are subsequently produced by compressed air can be expanded.

Zur Lösung der gestellten Aufgabe wird von einer Flachwärmetauscherplatte der eingangs beschriebenen Bauart ausgegangen und gelöst wird die Aufgabe dadurch, daß zwischen den beiden platten und zu beiden Seiten dicht neben dem Kanal eine Haftschicht aus einem amorphen Metall vorgesehen ist, und daß die platten im Bereich der Haftschicht durch Kaltwalzplattieren fest miteinander verbunden sind. Die Herstellung einer solchen Flachwärmetauscherplatte im Kaltwalzplattierverfahren ist sehr einfach und es sind mittels der Haftschicht Metalle für die Platten verwendbar, die bisher nicht eingesetzt werden konnten. Zweckmäßig ist die Haftschicht eine Folie aus einem amorphen Metall; an deren Stelle kann auch eine amorphe Oberflächenschicht auf wenigstens einer der beiden platten vorgesehen sein.To solve the problem, a flat heat exchanger plate of the type described above is assumed and the object is achieved in that an adhesive layer of an amorphous metal is provided between the two plates and close to the channel on both sides, and that the plates in the area of Adhesive layer are firmly connected to each other by cold rolling plating. The production of such a flat heat exchanger plate in the cold roll plating process is very simple and metals can be used for the plates by means of the adhesive layer which could not previously be used. The adhesive layer is expediently a film made of an amorphous metal; in their place, an amorphous surface layer can also be provided on at least one of the two plates.

Zur Begünstigung des Wärmeüberganges bestehen die beiden Platten vorteilhaft aus Kupfer bzw. einer Kupfer-Legierung.To favor the heat transfer, the two plates advantageously consist of copper or a copper alloy.

Die die Haftschicht bildende Folie besteht vorteilhaft aus einer amorphen Nickel-, Eisen-oder Kupfer-Legierung und enthält kristallisationsverzögernde Bestandteile, vornehmlich Silizium, Bor, phosphor, Aluminium und/oder Kohlenstoff.The film forming the adhesive layer advantageously consists of an amorphous nickel, iron or copper alloy and contains crystallization-delaying components, primarily silicon, boron, phosphorus, aluminum and / or carbon.

Nach einem weiteren, wichtigen Merkmal der Erfindung trägt jede platte eine aufplattierte Deckschicht, welche - wenn es sich bei dieser um ein mit der platte nicht plattierbares Metall handelt - gemäß dem Erfindungsgedanken unter Verwendung einer Haftschicht aus amorphem Metall hergestellt ist.According to a further, important feature of the invention, each plate has a plated-on top layer, which - if this is a metal which cannot be plated with the plate - is produced according to the inventive concept using an adhesive layer made of amorphous metal.

In besonders vorteilhafter Ausgestaltung der Erfindung bestehen die beiden Deckschichten der Platten aus einem gegen aggressive und/oder korrosive Medien beständigen Metall, wobei als Metall für die Deckschicht Titan bzw. eine Titanlegierung oder Tantal bzw. eine Tantallegierung Verwendung findet; als Metall für die Deckschicht kann auch rostfreier Chrom-Nickel-Stahl dienen. Nehmen die Kanäle der erfindungsgemäßen Flachwärmetauscherplatte das aggressive Medium auf, dann werden die beiden Platten ihre beständigen Deckschichten innen, den Kanälen zugewandt, tragen, strömt das aggressive Medium jedoch auf den Außenflächen der Flachwärmetauscherplatte, dann befinden sich die aggressionsbeständigen Deckschichten außen und die beiden meistens kupfernen Platten werden erfindungsgemäß aufeinander plattiert. Die Anwendung einer solchen Deckschicht läßt die sparsamste Verwendung des sehr teuren, korrosionsbeständigen Metalles zu. Zur Herstellung von erfindungsgemäßen Flachwärmetauscherplatten aus einem schlecht oder nicht kaltwalzplattierbaren Material wird ein Verfahren vorgeschlagen, bei welchem zwei von Vorratsrollen abgewickelte Metallbänder an vorgesehenen Stellen mittels eines sich drehenden Walzenpaares unter Druck miteinander verbunden, dann in Platten getrennt und anschließend die beim Verbinden ausgesparten Abschnitte zur Bildung wenigstens eines Kanals mittels Preßluft aufgeweitet werden, das sich dadurch auszeichnet, daß zwischen die aus einem schlecht oder nicht plattierbaren Material bestehenden Metallbänder an den zu verbindenden Stellen eine Haftschicht aus einem amorphen Metall eingebracht wird. Hierbei kann jedes Metallband eine aufplattierte Deckschicht, . z.B. aus einem korrosionsbeständigen Material, aufweisen. Dieses Verfahren ist hinsichtlich der Gestaltung der herzustellenden Flachwärmetauscherplatten ausserordentlich flexibel.In a particularly advantageous embodiment of the invention, the two cover layers of the plates consist of a metal which is resistant to aggressive and / or corrosive media, titanium or a titanium alloy or tantalum or a tantalum alloy being used as the metal for the cover layer; stainless chrome-nickel steel can also serve as metal for the cover layer. If the channels of the flat heat exchanger plate according to the invention take up the aggressive medium, then the two plates will carry their permanent cover layers on the inside, facing the channels, but if the aggressive medium flows on the outer surfaces of the flat heat exchanger plate, then the corrosion-resistant cover layers are on the outside and the two are mostly copper According to the invention, plates are plated onto one another. The use of such a top layer leaves the most economical Use of the very expensive, corrosion-resistant metal too. For the production of flat heat exchanger plates according to the invention from a poorly or not cold-roll-plateable material, a method is proposed in which two metal strips unwound from supply rolls are connected to one another at designated points by means of a rotating pair of rolls under pressure, then separated into plates and then the sections left unconnected for formation at least one channel can be widened by means of compressed air, which is characterized in that an adhesive layer made of an amorphous metal is introduced at the points to be connected between the metal strips, which consist of a material which is poorly or not capable of being plated. Each metal strip can have a plated top layer,. eg made of a corrosion-resistant material. This process is extremely flexible with regard to the design of the flat heat exchanger plates to be produced.

Die Haftschicht ist entweder eine Folie aus amorphem Metall oder sie wird als Oberflächenschicht auf wenigstens einem der Metallbänder aufgebracht.The adhesive layer is either a film made of amorphous metal or it is applied as a surface layer to at least one of the metal strips.

Die Haftschicht kann aus voneinander getrennt angeordneten Streifen bestehen und die Streifen können parallel und senkrecht zueinander angeordnet sein.The adhesive layer can consist of strips arranged separately from one another and the strips can be arranged parallel and perpendicular to one another.

Vorteilhaft besteht die Haftschicht aus jeweils zwei kammartig ausgebildeten und miteinander verzahnt angeordneten Streifen, dies gestattet die Herstellung einer Flachwärmetauscherplatte mit einem mäanderförmigen Kanal, welcher nur zwei Anschlüsse benötigt.The adhesive layer advantageously consists of two comb-like strips which are arranged in a toothed manner, this allows the production of a flat heat exchanger plate with a meandering channel which only requires two connections.

Zur Bildung der Haftschicht kann ein Metallnetz eingebracht werden, welches an wenigstens einem Teil seiner Kreuzungspunkte Plättchen aus amorphem Metall trägt. Mit Hilfe eines solchen Metallnetzes kann auf einfache Weise die Herstellung einer Flachwärmetauscherplatte mit vielfach verzweigten Kanälen bewerkstelligt werden. Zum Aufweiten der Kanäle werden die Platten zweckmäßig in eine Matrize entsprechender Form eingelegt.To form the adhesive layer, a metal mesh can be introduced which carries plates made of amorphous metal at at least part of its crossing points. With the help of such a metal network, the manufacture of a flat heat exchanger plate with multiple branched channels can be easily accomplished. To widen the channels, the plates are expediently placed in a die of appropriate shape.

Die Erfindung wird nachstehend anhand der beigefügten Zeichnungen näher erläutert. In den Zeichnungen zeigen:

  • Fig. 1 eine Flachwärmetauscherplatte mit zwei parallelen Kanälen in einer perspektivischen Darstellung;
  • Fig. 2 eine Flachwärmetauscherplatte mit einem mäanderförmig angeordneten Kanal, in perspektivischer Wiedergabe;
  • Fig. 3 eine zweiteilige Haftschicht aus einem amorphen Metall für eine Flachwärmetauscherplatte mit mäanderförmigem Kanal, in einer Draufsicht;
  • Fig. 4 ein zur Bildung einer Haftschicht dienendes Metallnetz mit an dessen Kreuzungspunkten angeordneten Plättchen aus einem amorphen Metall, in Draufsicht. Eine erfindungsgemäße Flachwärmetaut-cherplatte 1 besteht - vgl. Figur 1 - aus zwei dicht aneinander liegenden Platten 2 und 3 aus Metall, zwischen welchen zwei Kanäle 4 und 5 angeordnet sind. Diese beiden Kanäle 4 und 5 dienen zur Durchleitung eines strömenden, zu erwärmenden oder abzukühlenden, flüssigen bzw. gasförmigen Mediums.
The invention is explained below with reference to the accompanying drawings. The drawings show:
  • Figure 1 is a flat heat exchanger plate with two parallel channels in a perspective view.
  • Figure 2 is a flat heat exchanger plate with a meandering channel, in perspective representation.
  • 3 shows a two-part adhesive layer made of an amorphous metal for a flat heat exchanger plate with a meandering channel, in a plan view;
  • 4 is a plan view of a metal net used to form an adhesive layer with platelets made of an amorphous metal arranged at its crossing points. A flat heat exchanger plate 1 according to the invention exists - cf. Figure 1 - from two closely spaced plates 2 and 3 made of metal, between which two channels 4 and 5 are arranged. These two channels 4 and 5 are used to pass a flowing, heated or cooled, liquid or gaseous medium.

Die beiden Platten 2 und 3 bestehen aus einem schlecht oder nicht durch einen Plattiervorgang zu verbindenden Metall. Zwischen den Platten 2 und 3 ist eine Haftschicht 6 vorgesehen, welche als Haftvermittler dient und welche bis dicht beiderseits an die Kanäle 4 und 5 herangeführt ist. Im Bereich dieser Haftschicht 6 sind die beiden Platten 2 und 3 durch Kaltwalzplattieren fest miteinander verbunden.The two plates 2 and 3 consist of a metal which is difficult or impossible to connect by a plating process. Between the plates 2 and 3, an adhesive layer 6 is provided, which serves as an adhesion promoter and which is guided to the channels 4 and 5 up to both sides. In the area of this adhesive layer 6, the two plates 2 and 3 are firmly connected to one another by cold roll cladding.

Die Haftschicht 6 besteht aus einer amorphen Nickel-, Eisen oder Kupfer-Legierung, welche kristallisationsverzögernde Bestandteile, nämlich insbesondere Silizium, Bor, Phosphor, Aluminium und/oder Kohlenstoff enthält. Diese Haftschicht 6 kann eine Folie sein, welche vor dem Kaltwalzplattieren zwischen die beiden Platten 2 und 3 gelegt ist, es ist aber auch möglich, die Haftschicht 6 durch eine Bestrahlung der Oberfläche der einen der beiden Platten 2 bzw. 3 mit Laserlicht herzustellen.The adhesive layer 6 consists of an amorphous nickel, iron or copper alloy, which contains crystallization-delaying components, namely in particular silicon, boron, phosphorus, aluminum and / or carbon. This adhesive layer 6 can be a film which is placed between the two plates 2 and 3 before the cold roll cladding, but it is also possible to produce the adhesive layer 6 by irradiating the surface of one of the two plates 2 and 3 with laser light.

Die beiden beispielsweise aus Kupfer bestehenden platten 2 und 3 tragen jeweils eine mehr oder weniger dünne Deckschicht 7 bzw. 8, welche durch Kaltwalzplattieren aufgebracht ist. Bei der in Figur 1 wiedergegebenen Flachwärmetauscherplatte 1 liegen diese Deckschichten 7, 8 der Haftschicht 6 bzw. dem Innern der Kanäle 4 und 5 zugekehrt, sie können aber - wenn es der Anwendungszweck erfordert - auch an der Außenseite der Flachwärmetauscherplatte 1 liegen.The two plates 2 and 3, which are made of copper, for example, each carry a more or less thin cover layer 7 or 8, which is applied by cold rolling plating. In the flat heat exchanger plate 1 shown in FIG. 1, these cover layers 7, 8 face the adhesive layer 6 or the inside of the channels 4 and 5, but they can - if the application requires - also lie on the outside of the flat heat exchanger plate 1.

Die beiden Deckschichten 7 und 8 bestehen aus einem gegen aggressive und/oder korrosive Medien beständigen Metall, nämlich aus Titan oder aus Tantal bzw. einer Titan- oder TantalLegierung.The two cover layers 7 and 8 consist of a metal which is resistant to aggressive and / or corrosive media, namely titanium or tantalum or a titanium or tantalum alloy.

Die in Figur 2 dargestellte Flachwärmetauscherplatte ist ebenfalls aus zwei Platten 2' und 3' zusammengesetzt, die aus Kupfer bestehen und durch Kaltwalzplattieren unter Zwischenlage einer Haftschicht 6 miteinander verbunden sind. Zwischen den beiden Platten 2',3' ist ein mäanderförmiger Kanal 9 angeordnet.The flat heat exchanger plate shown in Figure 2 is also composed of two plates 2 'and 3', which consist of copper and are connected to each other by cold rolling cladding with the interposition of an adhesive layer 6. A meandering channel 9 is arranged between the two plates 2 ', 3'.

Die Herstellung der erfindungsgemäßen Flachwärmetauscherplatte geschieht dadurch, daß zwischen zwei von Vorratsrollen abgewickelten, aus einem schlecht oder nicht plattierbaren Material, nämlich z.B. aus Kupfer, bestehenden Metallbändern zunächst an bestimmten Stellen eine Haftschicht aus einem amorphen Metall (z.B. eine Nickel-, Eisen- oder Kupfer-Legierung mit kristallisationsverzögernden . Bestandteilen) eingebracht wird. Diese beiden Metallbänder werden sodann durch einen Kaltwalzplattiervorgang unter Verwendung eines sich drehenden Paares von Stahlwalzen unter hohem Druck miteinander verbunden, wobei die Verbindung nur an denjenigen Stellen geschieht, an welchen sich die Haftschicht befindet. Anschließend werden die verbunden Metallbänder in einzelne Platten zerschnitten und zuletzt werden die ausgesparten, nicht in Verbindung miteinander getretenen Abschnitte zur Bildung eines oder mehrerer Kanäle für ein zu erwärmendes bzw. abzukühlendes Medium auf übliche Weise aufgeweitet.The production of the flat heat exchanger plate according to the invention takes place in that an adhesive layer made of an amorphous metal (for example a nickel, iron or copper) is first made at certain points between two metal strips which are unwound from supply rolls and are made of a material which is difficult or not to be plated, namely copper Alloy with crystallization retarding constituents) is introduced. These two metal strips are then joined together by a cold rolling plating process using a rotating pair of steel rollers under high pressure, the Connection only occurs at those points where the adhesive layer is located. The connected metal strips are then cut into individual plates, and finally the recessed, non-connected sections are widened in a conventional manner to form one or more channels for a medium to be heated or cooled.

In der Figur 3 ist eine Haftschicht 6 aus einem amorphen Metall in Form von zwei kammartig ausgebildeten und miteinander verzahnt angeordneten, aus Folien hergestellten Streifen 10 und 11 dargestellt. Mittels dieser Haftschicht 6 können Flachwärmetauscherplatten hergestellt werden, welche einen mäanderförmingen Kanal aufweisen. Die strichpunktierte Linie deutet die Stelle an, an welcher nach dem Kaltwalzplattieren der Schnitt zum Zertrennen der Platten erfolgt.FIG. 3 shows an adhesive layer 6 made of an amorphous metal in the form of two comb-like strips 10 and 11 made of foils and arranged in an interlocking manner. By means of this adhesive layer 6, flat heat exchanger plates can be produced which have a meandering channel. The dash-dotted line indicates the point at which the cut for cutting the plates is made after the cold rolling plating.

Zur Herstellung von Flachwärmetauscherplatten, bei welche die beiden aneinanderliegenden Platten zur Bildung von mehrfach verzweigten Kanälen nur an bestimmten Stellen mehr oder weniger punktförmig miteinander verbunden werden sollen, dient ein beispielsweise aus einer Folie gefertigtes Metallnetz 12, wie dies in Figur 4 in Draufsicht wiedergegehben ist. Dieses Metallnetz 12 trägt an einem Teil seiner Krauzungspunkte 13 kleine, quadratische Plättchen 14, die aus einem amorphen Metall bestehen. Wird ein solches Metallnetz 12, welches vorzugsweise aus dem Metall der Bänder gefertigt ist, zwischen die schlecht bzw. nicht plattierbaren Metallbänder vor dem Kaltwalzplattieren eingelegt, dann werden diese nur an bestimmten Punkten miteinander verbunden.A metal mesh 12, for example made of a film, is used to produce flat heat exchanger plates, in which the two plates lying next to one another are only to be connected to one another at certain points to form multiply branched channels, as is shown in a top view in FIG. This metal net 12 carries at a part of its bulging points 13 small, square plates 14, which consist of an amorphous metal. If such a metal net 12, which is preferably made from the metal of the strips, is inserted between the metal strips, which are difficult to plate or not, before the cold rolling cladding, then these are only connected to one another at certain points.

Claims (20)

1. Flat heat-exchange plate comprising two plates, placed close together and made from a metal which is difficult or impossible to apply by cold roll-bonded plating, and at least one duct, located between these plates, for a permeating liquid or gaseous medium which is to be heated or cooled, characterised in that an adhesive coat (6) of amorphous metal is provided between the two plates (2, 2' and 3, 3') and on both sides close to the duct (4, 5) and that the plates (2, 2' and 3, 3') are firmly joined together by cold roll-bonded plating in the zone of the adhesive coat (6).
2. Flat heat-exchanger according to Claim 1. characterised in that the adhesive coat (6) is a foil of amorphous metal.
3. Flat heat-exchanger according to Claim 1, characterised in that the adhesive coat (6) is an amorphous surface coat on at least one of the two plates (2, 2' and 3, 3').
4. Flat heat-exchange plate according to one of the Claims 1 to 3, characterised in that the two plates (2, 2' and 3, 3') consist of copper or a copper alloy.
5. Flat heat-exchange plate according to Claim 2, characterised in that the foil consists of an amorphous nickel. iron or copper alloy and contains crystallisation-retarding ingredients.
6. Flat heat-exchange plate according to Claim 5. characterised in that the crystallisation-retarding ingredients are silicon, boron, phosphorus, aluminium and/or carbon.
7. Flat heat-exchange plate according to one of the Claims 1 to 6, characterised in that each plate (2, 2' and 3, 3') carries a plated surface coat (7, 8).
8. Flat heat-exchange plate according to Claim 7, characterised in that the surface coats (7 and 8) consist of a metal resistant to aggressive and/or corrosive media.
9. Flat heat-exchange plate according to Claim 8, characterised in that the metal which serves for the surface coat (7, 8) is titanium or a titanium alloy.
10. Flat heat-exchange plate according to Claim 8, characterised in that the metal which serves for the surface coat (7, 8) is tantalum or a tantalum alloy.
11. Flat heat-exchange plate according to Claim 9 characterised in that the metal which serves for the surface coat (7,8) is stainless chrome-nickel steel.
12. Process for the production of flat heat-exchange plates. made of a material, which is difficult or impossible to apply by cold roll-bonded plating, according to one of the Claims 1 to 11, in which two metal strips, wound off dispenser rolls, are joined together under pressure by means of a rotating pair of rollers at provided points and then separated into plates and the sections, left over after the joining-operation, are then expanded by means of compressed air, so as to form at least one duct, characterised in that an adhesive coat (6) of amorpnous metal is introduced between the metal strips at the points to be joined.
13. Process according to Claim 12. characterised in that each metal strip carries a plated surface coat (7, 8).
14. Process according to either Claim 12 or 13, characterised in that the adhesive coat (6) is a foil of amorphous metal.
15. Process according to either Claim 12 or 13, characterised in that the adhesive coat (6). i; applied as a surface coat to at least one of the metal strips.
16. Process according to one of the Claims 12 to 15, characterised in that the adhesive coat (6) consists of strips arranged scparately from one another.
17. Process according to Claim 16, characterised in that the strips are arranged parallel and at right angles to one another.
18. Process according to one of the Claims 12 to 16, characterised in that the adhesive coat (6) consists of always two mutually meshed strips (10, 11), formed in the manner of a comb.
19. Process according to one of the Claims 12 to 15, characterised in that a metal netting (12) is introduced for the formation of the adhesive coat (6), this netting carrying platelets (14) of amorphous metal on at least some of its intersections.
EP83111716A 1982-11-26 1983-11-23 Flat heat exchange plate and method of making it Expired EP0110311B1 (en)

Priority Applications (1)

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AT83111716T ATE18303T1 (en) 1982-11-26 1983-11-23 FLAT HEAT EXCHANGER PLATE AND METHOD OF PRODUCTION.

Applications Claiming Priority (2)

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DE3243713A DE3243713C2 (en) 1982-11-26 1982-11-26 Flat heat exchanger plate and process for their manufacture
DE3243713 1982-11-26

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EP0110311B1 true EP0110311B1 (en) 1986-02-26

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EP (1) EP0110311B1 (en)
JP (1) JPS59502115A (en)
AT (1) ATE18303T1 (en)
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WO (1) WO1984002178A1 (en)

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DE3243713A1 (en) 1984-06-14
US4687053A (en) 1987-08-18
DE3243713C2 (en) 1985-05-15
ATE18303T1 (en) 1986-03-15
WO1984002178A1 (en) 1984-06-07
EP0110311A1 (en) 1984-06-13
JPS59502115A (en) 1984-12-20
DE3362356D1 (en) 1986-04-03

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