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EP0159685B1 - Method of making the plates of a plate heat exchanger, and heat exchanger made with these plates - Google Patents

Method of making the plates of a plate heat exchanger, and heat exchanger made with these plates Download PDF

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Publication number
EP0159685B1
EP0159685B1 EP85104838A EP85104838A EP0159685B1 EP 0159685 B1 EP0159685 B1 EP 0159685B1 EP 85104838 A EP85104838 A EP 85104838A EP 85104838 A EP85104838 A EP 85104838A EP 0159685 B1 EP0159685 B1 EP 0159685B1
Authority
EP
European Patent Office
Prior art keywords
projections
plates
embossing
plate
tool
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.)
Expired
Application number
EP85104838A
Other languages
German (de)
French (fr)
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EP0159685A3 (en
EP0159685A2 (en
Inventor
Rudolf Seibel
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.)
Fischbach & Cokg Verwaltungsgesellschaft GmbH
Original Assignee
Fischbach & Cokg Verwaltungsgesellschaft GmbH
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
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Priority to AT85104838T priority Critical patent/ATE47809T1/en
Publication of EP0159685A2 publication Critical patent/EP0159685A2/en
Publication of EP0159685A3 publication Critical patent/EP0159685A3/en
Application granted granted Critical
Publication of EP0159685B1 publication Critical patent/EP0159685B1/en
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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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • 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
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall

Definitions

  • the invention relates to a method for producing the plates for a plate heat exchanger according to the preamble of claim 1 as from e.g. GB-A-827 063 known, as well as a plate heat exchanger made from these plates.
  • a plate heat exchanger to which the invention relates consists of a plurality of stacked plates, the mutual spacing of which is determined by projections which are stamped into the plates and protrude from the plate on one or both sides.
  • the projections are arranged in such a pattern that they form parallel flow channels between the plates, these flow channels generally being rotated alternately by 90 degrees between adjacent plates (cross-flow plate heat exchanger).
  • the space between two adjacent plates is open on the narrow sides opposite in the direction of flow, so that the medium involved in the heat exchange flows in one direction through every second of the spaces formed by the plates and the other medium perpendicularly through the remaining spaces.
  • the plates for the heat exchanger are made of easily pullable material, into which the protrusions are stamped.
  • an embossing tool is required, through which all the projections are embossed into the plate in a single embossing process.
  • Such a process requires a large and therefore expensive tool and also the availability of a large number of individual tools for different plate sizes.
  • the invention has for its object to develop a method for producing the plates for a plate heat exchanger of the type mentioned, in which the costs for the production of the plates can be kept much lower than in the known methods.
  • a plate heat exchanger which is produced by the method according to the invention has the features mentioned in the characterizing part of claim 6 according to the invention.
  • the method according to the invention makes it possible to produce panels of any size with a relatively small tool. It is sufficient if the length of the tool in the feed direction is so great that it extends only over the pitch T of the pattern of the projections in the feed direction plus the pitch t of an adjacent row of projections. Perpendicular to the feed direction, the tool can be assembled from individual parts according to the width of the plates.
  • Figure 1 shows a plate which is significantly larger than shown in both directions of its plane, which is indicated by the cross-shaped fracture lines a running through the figure.
  • the projections 2a shown in light protrude into the drawing plane, while the projections 2b shown in shaded (dotted) protrude from the drawing plane.
  • the projections lie on a square grid 10, which is constructed from grid fields 11.
  • the projections lying on opposite sides of the grid field are all either concave (grid field lines 10a and 10d) or convex (grid field lines 10c and 10b) with respect to the drawing plane.
  • the horizontal grid lines (for example 16, 19) and the vertical grid lines (for example 36, 39) (with the exception of the outer boundary lines 14 and 15) in FIG. 1 are all equally dense with projections
  • the projections 2b on the horizontal grid lines are all convex
  • the projections 2a on the vertical grid lines are all concave.
  • the sheet is pushed through, for example in the direction of arrow A, under an embossing tool 20 (FIG. 2).
  • the division of the pattern of the projections, which is repeated in the feed direction A, is denoted by T. It is therefore equal to the side length of a lattice field 11.
  • the projections are distributed over the sides of a lattice field 11 in such a way that they lie centrally symmetrical to the axis due to the geometric center of gravity of the lattice field.
  • the active i.e.
  • the defining minimum length 20 of the tool in the feed direction has the value W1.
  • the first line 21 and the last line 24 of the tool 20 in the feed direction are equipped with fewer dies (FIG. 2) than a corresponding line of projections 16, 19 on the plate (FIG. 1).
  • the two embossing stamp lines 21 and 24 each have only half as many stamps as there are projections on the corresponding line (grid field line) 19.
  • the embossing dies on one of these two embossing stamp rows are offset relative to the embossing dies on the other embossing stamp row (24) perpendicular to the feed direction.
  • This offset is such that when the two embossing stamp lines 21 and 24 are embossed on the same grid field line (in two consecutive embossing processes), a fully occupied line 19 of projections is formed.
  • the projection lines 16 and 19 are thus produced in two embossing processes and the projection lines 17 and 18 in one embossing process.
  • the finished plate on the outer boundary lines 12 to 15 of the grid is always occupied with such protrusions that are necessary in the finished plate heat exchanger to the edge of the plates support lying flow channels against each other by projections.
  • the number of spacing supports, each consisting of two interacting projections is only half as large; in practice, however, this is not a disadvantage. If you were to work with a tool whose embossing length is only equal to a pitch T of the pattern of the projections, then one of the side flow channels would no longer be on it. Be provided with spacers on the outside.
  • FIG. 3 shows, on an enlarged scale, a small section of the plate according to FIG. 1 along the section line I-I.
  • the shape of the two projections 2a and 2b protruding from the plate on one side can be seen.
  • the tool for producing a projection is indicated in principle. It consists of the embossing die 25 and a corresponding die 28 lying on the other side of the plate. It goes without saying that the part of the tool on the die side must have a recess at the point 28 indicated by the broken line in FIG in the first stamping process, the protrusion stamped by the stamp 28a is not destroyed in the second stamping process.
  • the number of the projections on the sides 10a to 10b of the grid can also take values other than two. The number can also be odd. With, for example, three projections per grating side, two projections can be arranged on the embossing stamp line 21 and one projection on the embossing stamp line 24, or vice versa.
  • the projections need not have the circularly symmetrical shape according to the exemplary embodiment. They can also have, for example, an elliptical or substantially rectangular shape corresponding to the grid lines.
  • the method according to the invention can also be designed such that the stamp 26a and / or the stamp 27a is missing on the two boundary lines 12a and 13a extending in the feed direction. Accordingly, the projections 26 and / or 27 are then omitted in the finished plate.
  • the plate of a plate heat exchanger constructed from such plates according to the invention then has, for example, a reduced number of projections on all four outer boundary lines 12 to 15.
  • the projections 26 and 27 in FIG. 1 can be dispensed with because they do not provide a supporting function because the corresponding second projection is already missing in the outer boundary lines 14 and 15.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

1. Method for manufacturing of the plates of a plate heat exchanger designed of plates (1) stacked upon one another and being provided with embossed projections (2a, 2b) which protrude out of the plane of the plate towards one side or the other side and are located on the lines of a lattice (10), whereby the plates are supported against one another via their projections and whereby the projections define parallel flow channels between adjacent plates, characterized in that the projections are embossed in the plate by at least two consecutive embossing steps by the same tool, with the plate being moved between each two embossing steps relative to the tool by an intergral multiple n of a pitch (T) of the pattern of the projections recurring in the feed direction, that the tool (20) has an active length in the feed direction of the plate which length is equals to said integral multiple n of the pitch (T) of the pattern of the projections plus the length of the pitch (t) of an adjacent projection, that the embossing punches on the first and the last embossing punch line (21, 24) of the tool, which lines extend perpendicular to the feed direction, are mutually displaced perpendicular to the feed direction, and that the number and the position of the embossing punches on the first and the last embossing punch line (21, 24) of the tool (20) are arranged such that the embossing punches of these two lines together form a fully occupied line (for example 16) of embossing punches.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung der Platten für einen Plattenwärmetauscher gemäß dem Oberbegriff des Anspruchs 1 wie aus z.B. GB-A-827 063 bekannt, sowie einen aus diesen Platten hergestellten Pfattenwärmetauscher.The invention relates to a method for producing the plates for a plate heat exchanger according to the preamble of claim 1 as from e.g. GB-A-827 063 known, as well as a plate heat exchanger made from these plates.

Ein Plattenwärmetauscher, auf den sich die Erfindung bezieht, besteht aus einer Vielzahl übereinandergestapelter Platten, deren gegenseitiger Abstand durch Vorsprünge bestimmt wird, die in die Platten eingeprägt sind und nach einer oder beiden Seiten aus der Platte hervorstehen. Die Vorsprünge sind in einem solchen Muster angeordnet, daß sie parallele Strömungskanäle zwischen den Platten bilden, wobei diese Strömungskanäle in der Regel zwischen benachbarten Platten abwechselnd um 90 Grad gegeneinander gedreht sind (Querstrom-Plattenwärmetauscher).A plate heat exchanger to which the invention relates consists of a plurality of stacked plates, the mutual spacing of which is determined by projections which are stamped into the plates and protrude from the plate on one or both sides. The projections are arranged in such a pattern that they form parallel flow channels between the plates, these flow channels generally being rotated alternately by 90 degrees between adjacent plates (cross-flow plate heat exchanger).

Der Zwischenraum zwischen zwei benachbarten Platten ist an den in Strömungsrichtung gegenüberliegenden Schmalseiten offen, so daß das eine am Wärmeaustausch beteiligte Medium in der einen Richtung durch jeden zweiten der von den Platten gebildeten Zwischenräume strömt und das andere Medium senkrecht dazu durch die übrigen Zwischenräume.The space between two adjacent plates is open on the narrow sides opposite in the direction of flow, so that the medium involved in the heat exchange flows in one direction through every second of the spaces formed by the plates and the other medium perpendicularly through the remaining spaces.

Die Platten für den Wärmetauscher werden aus gut ziehbarem Material hergestellt, in welches die Vorsprünge eingeprägt werden. Bei den bekannten Verfahren zur Herstellung dieser Platten ist ein Prägewerkzeug erforderlich, durch welches in einem einzigen Prägevorgang sämtliche Vorsprünge in die Platte eingeprägt werden. Ein solches Verfahren erfordert ein großes und damit teures Werkzeug sowie auch die Bereithaltung einer Vielzahl individueller Werkzeuge für verschiedene Plattengrößen.The plates for the heat exchanger are made of easily pullable material, into which the protrusions are stamped. In the known methods for producing these plates, an embossing tool is required, through which all the projections are embossed into the plate in a single embossing process. Such a process requires a large and therefore expensive tool and also the availability of a large number of individual tools for different plate sizes.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung der Platten für einen Plattenwärmetauscher der eingangs genannten Art zu entwickeln, bei dem die Kosten für die Herstellung der Platten wesentlich niedriger gehalten werden können als bei den bekannten Verfahren.The invention has for its object to develop a method for producing the plates for a plate heat exchanger of the type mentioned, in which the costs for the production of the plates can be kept much lower than in the known methods.

Zur Lösung dieser Aufgabe wird ein Verfahren nach dem Oberbegriff des Anspruches 1 vorgeschlagen, welches erfindungsgemäß die im kennzeichnenden Teil des Anspruches 1 genannten Merkmale hat.To achieve this object, a method is proposed according to the preamble of claim 1, which according to the invention has the features mentioned in the characterizing part of claim 1.

Vorteilhafte Ausgestaltungen des Verfahrens gemäß der Erfindung sind in den Ansprüchen 2 bis 5 genannt.Advantageous embodiments of the method according to the invention are mentioned in claims 2 to 5.

Ein Plattenwärmetauscher, der nach dem Verfahren gemäß der Erfindung hergestellt ist, hat erfindungsgemäß die im kennzeichnenden Teil des Anspruches 6 genannten Merkmale.A plate heat exchanger which is produced by the method according to the invention has the features mentioned in the characterizing part of claim 6 according to the invention.

Vorteilhafte Ausgestaltungen des Plattenwärmetauschers gemäß der Erfindung sind in den Ansprüchen 7 und 8 genannt.Advantageous embodiments of the plate heat exchanger according to the invention are mentioned in claims 7 and 8.

Durch das Verfahren gemäß der Erfindung ist es möglich, beliebig große Platten mit einem relativ kleinen Werkzeug herzustellen. Es genügt, wenn die Länge des Werkzeuges in Vorschubrichtung so groß ist, daß es sich nur über die Teilung T des Musters der Vorsprünge in Vorschubrichtung erstreckt zuzüglich der Teilung t einer angrenzenden Zeile von Vorsprüngen. Senkrecht zur Vorschubrichtung kann das Werkzeug entsprechend der Breite der Platten aus einzelnen Teilen variabel zusammengesetzt werden.The method according to the invention makes it possible to produce panels of any size with a relatively small tool. It is sufficient if the length of the tool in the feed direction is so great that it extends only over the pitch T of the pattern of the projections in the feed direction plus the pitch t of an adjacent row of projections. Perpendicular to the feed direction, the tool can be assembled from individual parts according to the width of the plates.

Anhand des in den Figuren gezeigten Ausführungsbeispiels soll die Erfindung näher erläutert werden. Es zeigen

  • Figur 1 eine Draufsicht auf eine Platte eines Plattenwärmetauschers gemäß einem Ausführungsbeispiel der Erfindung, die nach einem bevorzugten Verfahren gemäß der Erfindung hergestellt ist,
  • Figur 2 eine Draufsicht auf die prinzipielle Darstellung eines Werzeuges zur Durchführung des Verfahrens,
  • Figur 3 einen kleinen Ausschnitt aus der Platte nach Figur 1 im Schnitt längs der Linie I-I in Figur 1, wobei zugleich der prägende Teil des Werkzeugs für einen Vorsprung angedeutet ist.
The invention will be explained in more detail with reference to the exemplary embodiment shown in the figures. Show it
  • 1 shows a plan view of a plate of a plate heat exchanger according to an embodiment of the invention, which is produced by a preferred method according to the invention,
  • FIG. 2 shows a top view of the basic illustration of a tool for carrying out the method,
  • 3 shows a small section of the plate according to FIG. 1 in a section along the line II in FIG. 1, the embossing part of the tool for a projection being indicated at the same time.

Figur 1 zeigt eine Platte, die in beiden Richtungen ihrer Ebene bedeutend größer als dargestellt ist, was durch die kreuzförmig durch die Figur verlaufenden Bruchlinien a angedeutet ist. Die hell dargestellten Vorsprünge 2a ragen in die Zeichenebene hinein, während die schattig (gepunktet) dargestellten Vorsprünge 2b aus der Zeichenebene herausragen. Die Vorsprünge liegen auf einem quadratischen Gitter 10, das aus Gitterfeldern 11 aufgebaut ist. Für jedes quadratische Gitterfeld gilt, daß die auf jeweils gegenüberliegenden Seiten des Gitterfeldes liegenden Vorsprünge alle in bezug auf die Zeichenebene entweder konkav (Gitterfeldlinien 10a und 10d) oder konvex (Gitterfeldlinien 10c und 10b) sind. Wie man erkennt, sind in Figur 1 die waagerechten Gitterlinien (z.B. 16, 19) und die senkrechten Gitterlinien (z.B. 36, 39) (mit Ausnahme der äußeren Begrenzungslinien 14 und 15) alle gleich dicht mit Vorsprüngen besetzt, wobei die Vorsprünge 2b auf den waagerechten Gitterlinien alle konvex und die Vorsprünge 2a auf den senkrechten Gitterlinien alle konkav sind.Figure 1 shows a plate which is significantly larger than shown in both directions of its plane, which is indicated by the cross-shaped fracture lines a running through the figure. The projections 2a shown in light protrude into the drawing plane, while the projections 2b shown in shaded (dotted) protrude from the drawing plane. The projections lie on a square grid 10, which is constructed from grid fields 11. For each square grid field, the projections lying on opposite sides of the grid field are all either concave (grid field lines 10a and 10d) or convex (grid field lines 10c and 10b) with respect to the drawing plane. As can be seen, the horizontal grid lines (for example 16, 19) and the vertical grid lines (for example 36, 39) (with the exception of the outer boundary lines 14 and 15) in FIG. 1 are all equally dense with projections, the projections 2b on the horizontal grid lines are all convex and the projections 2a on the vertical grid lines are all concave.

Bei der Herstellung der Vorsprünge wird das Blech beispielsweise in Richtung des Pfeils A unter einem Prägewerkzeug 20 (Fig. 2) hindurchgeschoben. Die Teilung des sich in Vorschubrichtung A wiederholenden Musters der Vorsprünge ist mit T bezeichnet. Sie ist also gleich der Seitenlänge eines Gitterfeldes 11. Die Vorsprünge sind derart auf die Seiten eines Gitterfeldes 11 verteilt, daß sie zentralsymmetrisch zur Achse durch den geometrischen Schwerpunkt des Gitterfeldes liegen. Die aktive, d.h. prägende Mindestlänge 20 des Werkzeuges in Vorschubrichtung hat den Wert W1. Sie besteht also in der Summe aus der Teilung des sich wiederholenden Musters T der Vorsprünge in Vorschubrichtung und der Teilung t der Zeile 16 von Vorsprüngen, die sich unmittelbar an eine Teilung T anschließt. Allgemein gilt für die Länge W des Werkzeuges in Vorschubrichtung die Bedingung, daß sie ein ganzes Vielfaches n der Teilung T zuzüglich einer Teilung t beträgt, wobei n jede ganze Zahl einschließlich 1 sein kann. Vorzugsweise hat n den Wert 1, da dann das Werkzeug die kleinstmögliche Länge in Vorschubrichtung hat.During the production of the projections, the sheet is pushed through, for example in the direction of arrow A, under an embossing tool 20 (FIG. 2). The division of the pattern of the projections, which is repeated in the feed direction A, is denoted by T. It is therefore equal to the side length of a lattice field 11. The projections are distributed over the sides of a lattice field 11 in such a way that they lie centrally symmetrical to the axis due to the geometric center of gravity of the lattice field. The active, i.e. The defining minimum length 20 of the tool in the feed direction has the value W1. It therefore consists in the sum of the division of the repeating pattern T of the projections in the feed direction and the division t of the row 16 of projections, which immediately adjoins a division T. In general, the condition for the length W of the tool in the feed direction is that it is a whole multiple n of the division T plus a division t, where n can be any integer including 1. Preferably n has the value 1, since then the tool has the smallest possible length in the feed direction.

Die erste Zeile 21 und die letzte Zeile 24 des Werkzeugs 20 in Vorschubrichtung sind mit weniger Prägestempeln besetzt (Figur 2), als eine entsprechende Zeile von Vorsprüngen 16, 19 auf der Platte (Figur 1). Wie man an dem Ausführungsbeispiel gemäß Figur 2 erkennt, haben die beiden Prägestempelzeilen 21 und 24 jeweils nur halb so viele Stempel, wie sich Vorsprünge auf der entsprechenden Zeile (Gitterfeldlinie) 19 befinden. Die Prägestempel auf der einen dieser beiden Prägestempelzeilen (z.B. 21) sind gegenüber den Prägestempeln auf der anderen Prägestempelzeile (24) senkrecht zur Vorschubrichtung gegeneinander versetzt. Diese Versetzung ist so getroffen, daß beim Prägen der beiden Prägestempelzeilen 21 und 24 auf der gleichen Gitterfeldlinie (in zwei zeitlich aufeinanderfolgenden Prägevorgängen) eine vollbesetzte Zeile 19 von Vorprüngen entsteht. Gemäß dem Verfahren nach der Erfindung werden bei dem gezeigten Ausführungsbeispiel also die Vorsprungzeilen 16 und 19 in zwei Prägevorgängen hergestellt und die Vorsprungzeilen 17 und 18 in einem Prägevorgang.The first line 21 and the last line 24 of the tool 20 in the feed direction are equipped with fewer dies (FIG. 2) than a corresponding line of projections 16, 19 on the plate (FIG. 1). As can be seen from the exemplary embodiment according to FIG. 2, the two embossing stamp lines 21 and 24 each have only half as many stamps as there are projections on the corresponding line (grid field line) 19. The embossing dies on one of these two embossing stamp rows (for example 21) are offset relative to the embossing dies on the other embossing stamp row (24) perpendicular to the feed direction. This offset is such that when the two embossing stamp lines 21 and 24 are embossed on the same grid field line (in two consecutive embossing processes), a fully occupied line 19 of projections is formed. According to the method according to the invention, the projection lines 16 and 19 are thus produced in two embossing processes and the projection lines 17 and 18 in one embossing process.

Durch das Verfahren gemäß der Erfindung wird erreicht, daß trotz Verwendung eines in Vorschubrichtung relativ kurzen Werkzeuges die fertige Platte auf den äußeren Begrenzungslinien 12 bis 15 des Gitters stets mit solchen Vorsprüngen besetzt ist, die erforderlich sind, um im fertigen Plattenwärmetauscher die am Rande der Platten liegenden Strömungskanäle durch Vorsprünge gegeneinander abzustützen. Zwar ist auf diesen äußeren Begrenzungslinien die Anzahl der aus je zwei zusammenwirkenden Vorprüngen bestehenden Abstandsstützen nur halb so groß; dies ist aber in der Praxis kein Nachteil. Würde man mit einem Werkzeug arbeiten, dessen Prägelänge nur gleich einer Teilung T des Musters der Vorsprünge ist, dann würde einer der seitlichen Strömungskanäle nicht mehr an seiner. Außenseite mit Abstandsstützen versehen sein.By the method according to the invention it is achieved that despite the use of a relatively short tool in the feed direction, the finished plate on the outer boundary lines 12 to 15 of the grid is always occupied with such protrusions that are necessary in the finished plate heat exchanger to the edge of the plates support lying flow channels against each other by projections. On these outer boundary lines, the number of spacing supports, each consisting of two interacting projections, is only half as large; in practice, however, this is not a disadvantage. If you were to work with a tool whose embossing length is only equal to a pitch T of the pattern of the projections, then one of the side flow channels would no longer be on it. Be provided with spacers on the outside.

Figur 3 zeigt im vergrößerten Maßstab einen kleinen Ausschnitt aus der Platte gemäß Figur 1 längs der Schnittlinie I-I. Man erkennt die Form der beiden nach je einer Seite aus der Platte hervorragenden Vorsprünge 2a und 2b. Zugleich ist das Werkzeug zur Herstellung eines Vorsprungs im Prinzip angedeutet. Es besteht aus dem Prägestempel 25 und einer entsprechenden auf der anderen Seite der Platte liegenden Matrize 28. Es versteht sich, daß der matrizenseitige Teil des Werkzeuges an der in Figur 2 gestrichelt angedeuteten Stelle 28 und den anderen entsprechenden Stellen eine Ausnehmung haben muß, damit der im ersten Prägevorgang von dem Prägestempel 28a geprägte Vorsprung beim zweiten Prägevorgang nicht zerstört wird.FIG. 3 shows, on an enlarged scale, a small section of the plate according to FIG. 1 along the section line I-I. The shape of the two projections 2a and 2b protruding from the plate on one side can be seen. At the same time, the tool for producing a projection is indicated in principle. It consists of the embossing die 25 and a corresponding die 28 lying on the other side of the plate. It goes without saying that the part of the tool on the die side must have a recess at the point 28 indicated by the broken line in FIG in the first stamping process, the protrusion stamped by the stamp 28a is not destroyed in the second stamping process.

Man erkennt leicht, daß die Erfindung nicht auf das spezielle Ausführungsbeispiel beschränkt ist. Die Anzahl der auf den Seiten 10a bis 10b des Gitters liegenden Vorsprünge kann auch andere Werte als zwei annehmen. Die Anzahl kann auch ungerade sein. Bei beispielsweise drei Vorsprüngen pro Gitterseite können auf der Prägestempelzeile 21 zwei Vorsprünge und auf der Prägestempelzeile 24 ein Vorsprung angeordnet sein oder umgekehrt.It is easy to see that the invention is not limited to the specific embodiment. The number of the projections on the sides 10a to 10b of the grid can also take values other than two. The number can also be odd. With, for example, three projections per grating side, two projections can be arranged on the embossing stamp line 21 and one projection on the embossing stamp line 24, or vice versa.

Selbstverständlich brauchen die Vorsprünge nicht die kreissymmetrische Form gemäß dem Ausführungsbeispiel zu haben. Sie können auch beispielsweise eine sich in Richtung der Gitterlinien entsprechende elliptische oder im wesentlichen rechteckige Form haben.Of course, the projections need not have the circularly symmetrical shape according to the exemplary embodiment. They can also have, for example, an elliptical or substantially rectangular shape corresponding to the grid lines.

Das Verfahren gemäß der Erfindung kann auch so ausgebildet sein, daß auf den beiden in Vorschubrichtung verlaufenden Begrenzungslinien 12a und 13a der Stempel 26a und/oder der Stempel 27a fehlt. Entsprechend entfallen dann in der fertigen Platte die Vorsprünge 26 und/oder 27. Die Platte eines aus solchen Platten aufgebauten Plattenwärmetauschers gemäß der Erfindung hat dann beispielsweise auf allen vier äußeren Begrenzungslinien 12 bis 15 eine verminderte Anzahl von Vorsprüngen. Auf die Vorsprünge 26 und 27 in Figur 1 kann nämlich verzichtet werden, da sie keine abstützende Funktion ergeben, weil in den äußeren Begrenzungslinien 14 und 15 der jeweils entsprechende zweite Vorsprung bereits fehlt.The method according to the invention can also be designed such that the stamp 26a and / or the stamp 27a is missing on the two boundary lines 12a and 13a extending in the feed direction. Accordingly, the projections 26 and / or 27 are then omitted in the finished plate. The plate of a plate heat exchanger constructed from such plates according to the invention then has, for example, a reduced number of projections on all four outer boundary lines 12 to 15. The projections 26 and 27 in FIG. 1 can be dispensed with because they do not provide a supporting function because the corresponding second projection is already missing in the outer boundary lines 14 and 15.

Claims (8)

1. Method for manufacturing of the plates of a plate heat exchanger designed of plates (1) stacked upon one another and being provided with embossed projections (2a, 2b) which protrude out of the plane of the plate towards one side or the other side and are located on the lines of a lattice (10), whereby the plates are supported against one another via their projections and whereby the projections define parallel flow channels between adjacent plates, characterized in that the projections are embossed in the plate by at least two consecutive embossing steps by the same tool, with the plate being moved between each two embossing steps relative to the tool by an integral multiple n of a pitch (T) of the pattern of the projections recurring in the feed direction, that the tool (20) has an active length in the feed direction of the plate which length is equals to said integral multiple n of the pitch (T) of the pattern of the projections plus the length of the pitch (t) of an adjacent projection, that the embossing punches on the first and the last embossing punch line (21, 24) of the tool, which lines extend perpendicular to the feed direction, are mutually displaced perpendicular to the feed direction, and that the number and the position of the embossing punches on the first and the last embossing punch line (21, 24) of the tool (20) are arranged such that the embossing punches of these two lines together form a fully occupied line (for example 16) of embossing punches.
2. Method according to claim 1, characterized in that the density (number) of embossing punches in the first and the last embossing punch line (21, 24) is half as great as the density of projection on the lattice lines (16, 19) of the plate to be embossed.
3. Method according to any of the preceding claims, characterized in that the number n of integral pitches (T) of the pattern of projections covered by the tool in the direction of feed is one.
4. Method according to any of the preceding claims, characterized in that the outermost left and/or outermost right line (12, 13) of projection embossing punches of the tool, which lines extend parallel with the feed direction, have likewise a diminished density of embossing punches according to the rules of the claims 1 to 3.
5. Method according to any of the preceding claims, characterized in that the tool (20), perpendicular to the direction of feed (A), is composed of a number of sub-tools (20a to 20c) with the total length of the part sub-tools being adjusted to the side length of the plate to be embossed.
6. Plate heat exchanger built-up of plates stacked upon one another, the plates being provided with projections (2a, 2b) which protrude out of the plane of the plate to one side or the other side of the plate and which are arranged on the lines of lattice (10) in such a way that the projections which protrude to the same side of the plate are located on opposing sides (10a, 10d; 10c, 10b respectively) of the lattice fields, with all the plates being identical with respect to the embossing pattern of the projections but being alternately turned in the stack by 90 degree in the plane of the plate, whereby the plates are supported against each other by means of their projections and whereby the projections define parallel flow channels between the plates which flow channels extend in each interspace between two plates perpendicular to the flow channels in the immediately adjacent interspace, characterized in that of the total of four outer border lines (12 to 15) of the lattice (10) at least on two opposing outer border lines (12, 13; 14, 15) the density of projections (2a, 2b) is smaller than on the remaining lines of the lattice and that the projections on the at least two opposing border lines (12, 13; 14, 15) are mutually displaced in the direction of the border lines.
7. Plate heat exchanger according to claim 6, characterized in that the amount and position of the projections on the at least two opposing border lines (12, 13; 14, 15) is selected such that the projections on these two border lines together form a lattice line fully occupied with projections.
8. Plate heat exchanger according to any of claims 7 or 8, characterized in that the density of projections (2a, 2b) on the at least two opposing outer border lines (12, 13; 14, 15) of the quadratic lattice is half as great as on the remaining lines of the quadratic lattice.
EP85104838A 1984-04-27 1985-04-22 Method of making the plates of a plate heat exchanger, and heat exchanger made with these plates Expired EP0159685B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85104838T ATE47809T1 (en) 1984-04-27 1985-04-22 PROCESS FOR MAKING THE PLATES OF A PLATE HEAT EXCHANGER AND HEAT EXCHANGER MADE FROM THE PLATES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3415733 1984-04-27
DE19843415733 DE3415733A1 (en) 1984-04-27 1984-04-27 METHOD FOR PRODUCING THE PLATES OF A PLATE HEAT EXCHANGER AND HEAT EXCHANGERS MADE FROM THE PLATES

Publications (3)

Publication Number Publication Date
EP0159685A2 EP0159685A2 (en) 1985-10-30
EP0159685A3 EP0159685A3 (en) 1986-12-03
EP0159685B1 true EP0159685B1 (en) 1989-11-08

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ID=6234519

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EP85104838A Expired EP0159685B1 (en) 1984-04-27 1985-04-22 Method of making the plates of a plate heat exchanger, and heat exchanger made with these plates

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EP (1) EP0159685B1 (en)
AT (1) ATE47809T1 (en)
DE (2) DE3415733A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2596700B1 (en) * 1986-04-08 1990-10-12 Esswein Sa MODULAR PRESS TOOL
DK0699292T3 (en) * 1993-05-29 1999-03-22 Bowman E J Birmingham Ltd heat exchanger
DE29705396U1 (en) * 1997-03-25 1998-08-13 Elpag Ag Chur, Chur Heat exchanger with uneven arrangement of the medium guide elements
SE521816C2 (en) 1999-06-18 2003-12-09 Valeo Engine Cooling Ab Fluid transport pipes and vehicle coolers
SE517450C2 (en) 1999-06-18 2002-06-04 Valeo Engine Cooling Ab Fluid transport tubes and methods and apparatus for producing the same
DE10324089A1 (en) * 2003-02-13 2004-09-02 Loher Gmbh Recuperative plate heat exchanger
EP3006884B1 (en) * 2014-10-07 2017-11-22 Borgwarner Emissions Systems Spain, S.L.U. Tube for a heat exchanger
USD840958S1 (en) 2016-11-15 2019-02-19 Borgwamer Emissions Systems Spain, S.L.U. Shaped tube with a pattern

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Publication number Priority date Publication date Assignee Title
US1826344A (en) * 1930-09-23 1931-10-06 Res & Dev Corp Heat exchange element
US2306526A (en) * 1938-11-30 1942-12-29 Cherry Burrell Corp Method of making heat exchange elements
GB827063A (en) * 1955-04-26 1960-02-03 Rolls Royce Improvements in or relating to heat-exchange apparatus
US3233665A (en) * 1963-08-02 1966-02-08 Rosenblad Corp Flexible plate heat exchangers with plate flexing controlling means
DE1777061A1 (en) * 1968-08-30 1971-04-08 Blanc & Co Manufacturing process for embossed sheet metal

Also Published As

Publication number Publication date
EP0159685A3 (en) 1986-12-03
DE3415733A1 (en) 1985-10-31
DE3574113D1 (en) 1989-12-14
ATE47809T1 (en) 1989-11-15
EP0159685A2 (en) 1985-10-30

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