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EP0305665A1 - Heat exchanger with lamella fins - Google Patents

Heat exchanger with lamella fins Download PDF

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Publication number
EP0305665A1
EP0305665A1 EP88109600A EP88109600A EP0305665A1 EP 0305665 A1 EP0305665 A1 EP 0305665A1 EP 88109600 A EP88109600 A EP 88109600A EP 88109600 A EP88109600 A EP 88109600A EP 0305665 A1 EP0305665 A1 EP 0305665A1
Authority
EP
European Patent Office
Prior art keywords
tongues
fins
tube
heat exchanger
lamella
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
EP88109600A
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German (de)
French (fr)
Other versions
EP0305665B1 (en
Inventor
Wolfgang Hesse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0305665A1 publication Critical patent/EP0305665A1/en
Application granted granted Critical
Publication of EP0305665B1 publication Critical patent/EP0305665B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means

Definitions

  • the invention relates to a heat exchanger with fins, which are spaced from one another and parallel to one another by shaped collars of the fins and which are penetrated in passages of the collar by parallel tubes, the inner diameter of the passage being adapted to the outer diameter of the tube and is at least partially on the outer circumference of the tube.
  • the shaped collars of the fins are in order to ensure the spacing thereof from one another Slat surface arranged distributed. Although this causes a good swirling of the cooling air flowing through the heat exchanger, it also requires a corresponding flow resistance. However, this is undesirable, particularly in the case of the slow driving speeds of vehicles in city traffic. If a harder material is to be used for the lamellar ribs in order to increase the strength, the edges of the shaped collars tend to tear, since the deformability of the material of higher strength is overwhelmed. Cracks in the fins disrupt the heat flow, increase the flow resistance, promote corrosion and thereby reduce the service life of the heat exchanger.
  • the present invention has for its object to design a heat exchanger of the type mentioned in such a way that the individual fin ribs are kept as far apart as possible by the collars without the collars increasing the flow resistance of the cooling air, also with Use of materials with higher strength cracking in the deformed material is safely avoided.
  • the invention provides that tongues are arranged on the solid edge of the passage distributed around the circumference, that the free ends of the tongues are angled at an angle to the tube projecting through the passage and that these angled tongues give off spacing surfaces for the subsequent parallel lamellar rib .
  • the distance contact surfaces also improve the heat conduction by increasing the contact area in the pipe area.
  • the spaces between the fins are otherwise free of spacers, so that the cooling air can pass through with optimally low flow resistance.
  • a variable rib division can be achieved by angling the tongues at an angle below 90 °, e.g. by 45 °. Then the distance between the lamellar ribs becomes greater than with an angle of 90 °.
  • a particularly precise lamella spacing can be achieved by making the distance of the spacer contact surfaces from the lamella base surface the same by means of a calibration press on all spacer contact surfaces of the lamellar rib.
  • the required deformation can be kept optimally low, so that no cracking occurs even when processing lamellar fin materials of higher strength.
  • the largest outer dimension of the punched out before pulling through is smaller than the outer diameter of the pipe.
  • a cylindrical edge is created, to which the tongues connect at the end.
  • the fins are first provided with star-shaped punchings, then the edges of these punchings with their tongues formed by the star shape are deformed by 90 ° by means of pull punches and then the tongues are at least a substantial part of them Length angled outwards to form the spacer contact surfaces.
  • the fins 1 produced in this way are then arranged parallel to one another on tubes running parallel to one another to form the heat exchanger.
  • the individual lamella ribs 1 are held at the same distance from one another by the spacer contact surfaces 6, the outer diameter 10 of the tube 9 corresponding to the inner diameter 11 of the collar 8.
  • the punch 2 has six tongues 3, while in the embodiment shown in Figures 7 to 11 for lamellar fins 1 with tubes 9 with a smaller diameter only three tongues 3 are provided for each punch 2.
  • the design according to the embodiment of Figures 1 to 6 is such that a detailed description is unnecessary here.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

In a heat exchanger with lamella fins (1), which are held at a distance from and parallel to one another by shaped collars (8) of the lamella fins (1) and are penetrated in passages (2') of the collars (8) by tubes (9) extending parallel with respect to one another, the internal diameter of the passage (2') being matched in each case to the external diameter of the tube (9) and bearing at least partially against the outer circumference of the tube (9), it is proposed in order to be able to use materials of higher strength without the risk of cracking during deformation while simultaneously exactly maintaining the spacings (5) between the lamella fins (1) that tongues (3) are arranged distributed on the circumference on the penetrated rim of the passage (2'), the free ends of the tongues (9) are bent at an angle to the tube (9) penetrating the passage (2'), and that these bent tongues (9) provide distance bearing surfaces (6) for the adjoining lamella fins (1). …<IMAGE>…

Description

Die Erfindung betrifft einen Wärmetauscher mit Lamellenrippen, die durch ausgeformte Kragen der Lamellenrippen im Abstand voneinander und parallel zueinander gehalten sind und die in Durchzügen der Kragen von parallel zueinander verlaufenden Rohren durchdrungen sind, wobei jeweils der Innendurchmesser des Durchzugs an den Außendurchmesser des Rohrs angepaßt ist und am Außenumfang des Rohres mindestens teilweise anliegt.The invention relates to a heat exchanger with fins, which are spaced from one another and parallel to one another by shaped collars of the fins and which are penetrated in passages of the collar by parallel tubes, the inner diameter of the passage being adapted to the outer diameter of the tube and is at least partially on the outer circumference of the tube.

Bei einem solchen aus der DE-OS 21 23 722 bekannten Wärmetauscher sind die ausgeformten Kragen der Lamellen zur Sicherstellung des Abstands derselben voneinander in der Lamellenfläche verteilt angeordnet. Dies bewirkt zwar eine gute Durchwirbelung der durch den Wärmetauscher hinduchströmenden Kühlluft bedingt aber auch einen entsprechenden Durchströmwiderstand. Ein solcher ist aber insbesondere bei den langsamen Fahrgeschwindigkeiten von Fahrzeugen im Stadtverkehr unerwünscht. Soll für die Lamellenrippen zur Erhöhung der Festigkeit ein härteres Material verwendet werden, so neigen die Ränder der ausgeformten Kragen, zum Reißen, da die Verformungsfähigkeit des Materials höherer Festigkeit überfordert ist. Risse in den Lamellenrippen stören den Wärmefluß, erhöhen den Durchströmungswiderstand, fördern die Korrosion und vermindern dadurch die Lebensdauer des Wärmetauschers.In such a heat exchanger known from DE-OS 21 23 722, the shaped collars of the fins are in order to ensure the spacing thereof from one another Slat surface arranged distributed. Although this causes a good swirling of the cooling air flowing through the heat exchanger, it also requires a corresponding flow resistance. However, this is undesirable, particularly in the case of the slow driving speeds of vehicles in city traffic. If a harder material is to be used for the lamellar ribs in order to increase the strength, the edges of the shaped collars tend to tear, since the deformability of the material of higher strength is overwhelmed. Cracks in the fins disrupt the heat flow, increase the flow resistance, promote corrosion and thereby reduce the service life of the heat exchanger.

Aus der GB 20 47 399 ist es bekannt, freigestanzte abgewinkelte Zungen der Lamellenrippen mit den Wärmetauscherrohren zu verlöten. Durch die wenigen relativ schmalen abgewinkelten Zungen ist der Wärmefluß stark behindert.From GB 20 47 399 it is known to solder free-punched angled tongues of the fin ribs to the heat exchanger tubes. Due to the few relatively narrow angled tongues, the heat flow is severely hampered.

In Vermeidung der geschilderten Nachteile liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen Wärmetauscher der eingangs genannten Art so zu gestalten, daß die einzelnen Lamellenrippen durch die Kragen möglichst exakt auf Abstand gehalten werden, ohne daß die Kragen den Durchströmungswiderstand der Kühlluft erhöhen, wobei auch bei Verwendung von Werkstoffen höherer Festigkeit eine Rißbildung im verformten Material sicher vermieden wird.In avoiding the disadvantages described, the present invention has for its object to design a heat exchanger of the type mentioned in such a way that the individual fin ribs are kept as far apart as possible by the collars without the collars increasing the flow resistance of the cooling air, also with Use of materials with higher strength cracking in the deformed material is safely avoided.

Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß am durchgezogenen Rand des Durchzugs am Umfang verteilt Zungen angeordnet sind, daß die freien Enden der Zungen in einem Winkel zum den Durchzug durchragenden Rohr abgewinkelt sind und daß diese abgewinkelten Zungen Distanzanlageflächen für die anschließende parallele Lamellenrippe abgeben. Damit wird durch die Distanzanlageflächen neben der exakten Abstandseinhaltung gleichzeitig noch durch die Berührungsflächenvergrößerung im Rohrbereich die Wärmeleitung verbessert. Die Zwischenräume zwischen den Lamellenrippen sind sonst frei von Distanzhaltern, so daß die Kühlluft mit optimal geringem Durchströmwiderstand durchstreichen kann.To achieve this object, the invention provides that tongues are arranged on the solid edge of the passage distributed around the circumference, that the free ends of the tongues are angled at an angle to the tube projecting through the passage and that these angled tongues give off spacing surfaces for the subsequent parallel lamellar rib . In addition to maintaining the exact distance, the distance contact surfaces also improve the heat conduction by increasing the contact area in the pipe area. The spaces between the fins are otherwise free of spacers, so that the cooling air can pass through with optimally low flow resistance.

Eine variable Rippenteilung kann dadurch erreicht werden, daß die Zungen in einem Winkel unter 90° abgewinkelt werden, z.B. um 45°. Dann wird der Abstand der Lamellenrippen größer als bei einer Abwinklung von 90°.A variable rib division can be achieved by angling the tongues at an angle below 90 °, e.g. by 45 °. Then the distance between the lamellar ribs becomes greater than with an angle of 90 °.

Ein besonders exakter Lamellenabstand kann dadurch erreicht werden, daß der Abstand der Distanzanlageflächen von der Lamellengrundfläche durch ein Kalibrierpressen bei allen Distanzanlageflächen der Lamellenrippe gleich gemacht wird.A particularly precise lamella spacing can be achieved by making the distance of the spacer contact surfaces from the lamella base surface the same by means of a calibration press on all spacer contact surfaces of the lamellar rib.

Dadurch, daß in Abhängigkeit vom Rohrdurchmesser die Anzahl der angeordneten Zungen bei größerem Rohrdurchmesser größer ist als bei kleinerem Rohrdurchmesser, kann die erforderliche Verformung optimal niedrig gehalten werden, so daß auch bei der Verarbeitungvon Lamellenrippenwerkstoffen höherer Festigkeit keine Rißbildung auftritt.Characterized in that, depending on the pipe diameter, the number of tongues arranged is larger with a larger pipe diameter than with a smaller pipe diameter, the required deformation can be kept optimally low, so that no cracking occurs even when processing lamellar fin materials of higher strength.

Zur Erzielung möglichst großer Anlageflächen für den Wärmeübergang am das den Wärmeträger führende Rohr ist die größte Außenabmessung der Ausstanzung vor dem Durchziehen kleiner als der Außendurchmesser des Rohrs. Beim Durchziehen entsteht dann ein zylindrischer Rand, an den sich die Zungen stirnseitig anschließen.In order to achieve the largest possible contact surfaces for the heat transfer on the pipe carrying the heat transfer medium, the largest outer dimension of the punched out before pulling through is smaller than the outer diameter of the pipe. When pulling through, a cylindrical edge is created, to which the tongues connect at the end.

Zur Herstellung der Lamellenrippen für einen Wärmetauscher der eingangs genannten Art werden die Lamellenrippen zuerst mit sternförmigen Ausstanzungen versehen, dann werden die Ränder dieser Ausstanzungen mit ihren durch die Sternform gebildeten Zungen um 90° mittels Durchziehstempeln verformt und anschließend werden die Zungen über mindestens einen wesentlichen Teil ihrer Länge zur Bildung der Distanzanlageflächen nach außen abgewinkelt.To produce the fins for a heat exchanger of the type mentioned, the fins are first provided with star-shaped punchings, then the edges of these punchings with their tongues formed by the star shape are deformed by 90 ° by means of pull punches and then the tongues are at least a substantial part of them Length angled outwards to form the spacer contact surfaces.

Dadurch, daß die Zungen bei der Herstellung des Ausstanzung freigestanzt und dazu die Außenkontur des Ausstanzung sternartig ausgebildet ist, muß der Lamellenrippenwerkstoff beim Durchziehen zur Bildung des Kragens nicht sehr stark verformt werden, so daß auch härteres Rippenmaterial verwendet werden kann, um so Kühlerbeschädigungen im robusten Betrieb und bei Reinigungsarbeiten möglichst gering zu halten. Weitere erfindungsgemäße Ausbildungen sind den Unteransprüchen zu entnehmen und werden mit ihren Vorteilen anhand der beigefügten Zeichnungen in der nachstehenden Beschreibung näher erläutert. In den beigefügten Zeichnungen zeigt:

  • Figur 1 eine Teildraufsicht auf eine Ausstanzung einer Lamellenrippe,
  • Figur 2 einen Teilschnitt entlang der Linie II-II in Figure 1,
  • Figuren 3, 4 den Figuren 1 und 2 entsprechende Darstellungen des zweiten Arbeitsschrittes nach dem Durchziehen des Rands der Ausstanzung,
  • Figuren 5, 6 den Figuren 1 und 2 bzw. 3 und 4 entsprechende Darstellungen des letzten Arbeitsgangs beim Herstellen der Lamellenrippen mit umgebogenen Zungen, wobei in Figur 6 das einen Wärmeträger führende Rohr eingezeichnet ist und
  • Figuren 7 bis 12 den Figuren 1 bis 6 entsprechende Darstellungen einer anderen Ausführungsform mit kleinerer Ausstanzung und entsprechend weniger am Umfang der Ausstanzung angeordneten Zungen.
Due to the fact that the tongues are punched free during the production of the punching and the outer contour of the punching is star-shaped, the lamellar rib material does not have to be deformed very much when pulled through to form the collar, so that harder rib material can also be used, in order to damage the radiator in a robust manner business and keep it as low as possible during cleaning work. Further designs according to the invention can be found in the subclaims and their advantages are explained in more detail with reference to the accompanying drawings in the description below. In the accompanying drawings:
  • FIG. 1 shows a partial top view of a punched-out lamella rib,
  • FIG. 2 shows a partial section along the line II-II in FIG. 1,
  • FIGS. 3, 4 representations corresponding to FIGS. 1 and 2 of the second working step after pulling through the edge of the punched-out section,
  • FIGS. 5, 6 representations corresponding to FIGS. 1 and 2 or 3 and 4 of the last working step in the manufacture of the lamellar ribs with bent tongues, the pipe carrying a heat transfer medium being shown in FIG. 6 and
  • Figures 7 to 12 representations corresponding to Figures 1 to 6 of another embodiment with a smaller punched out and corresponding tongues arranged less on the circumference of the punching.

Für alle entsprechenden Teile werden in der nachfolgenden Beschreibung die gleichen Bezugszeichen verwendet.The same reference numerals are used for all corresponding parts in the following description.

In der nur partiell in Draufsicht in Figur 1 dargestellten Lamellenrippe 1 aus Blech ist eine etwa sternförmige Ausstanzung 2 mit am Umfang verteilten Zungen 3 eingebracht. Im Durchziehverfahren ist dann der Randbereich der Ausstanzung 2 mit den Zungen 3 gemäß den Figuren 3 und 4 durchgezogen und bildet so einen in den Ausführungsbeispielen kreisrunden Durchzug 2′ mit einem zylindrischen Teil 4, an den sich die Zungen 3 fluchtend anschließen. Die Zungen 3 selbst werden anschließend gemäß den Figuren 5 und 6 über einen wesentlichen Teil ihrer Länge um 90° abgewinkelt, wobei durch ein Kalibrierpressen der Abstand 5, der durch die Abwinkelung gebildeten Distanzanlageflächen 6 von der Lamellengrundfläche 7 bei allen so gebildeten Kragen 8 der Lamellenrippen gleich gemacht wird.An approximately star-shaped punching 2 with tongues 3 distributed around the circumference is introduced into the lamella rib 1 made of sheet metal, which is only partially shown in plan view. In the pulling process, the edge region of the punched-out 2 with the tongues 3 according to FIGS. 3 and 4 is pulled through and thus forms a circular passage 2 'in the exemplary embodiments with a cylindrical part 4, to which the tongues 3 adjoin in alignment. The tongues 3 themselves are then angled according to FIGS. 5 and 6 over a substantial part of their length by 90 °, the distance 5, the spacing surfaces 6 formed by the angling from the base surface 7 of all the collars 8 of the fin ribs formed in this way being calibrated is done immediately.

Die so hergestellten Lamellenrippen 1 werden dann auf parallel zueinander verlaufende Rohre parallel zueinander zur Bildung des Wärmetauschers angeordnet. Durch die Distanzanlageflächen 6 werden die einzelnen Lamellenrippen 1 in gleichem Abstand voneinander gehalten, wobei der Außendurchmesser 10 des Rohrs 9 dem Innendurchmesser 11 des Kragens 8 entspricht. Durch Aufweitung der Rohre 9 wird zur Erzeugung eines guten Wärmeübergangs ein Preßsitz erzeugt.The fins 1 produced in this way are then arranged parallel to one another on tubes running parallel to one another to form the heat exchanger. The individual lamella ribs 1 are held at the same distance from one another by the spacer contact surfaces 6, the outer diameter 10 of the tube 9 corresponding to the inner diameter 11 of the collar 8. By Widening of the tubes 9 a press fit is generated to produce good heat transfer.

Beim Ausführungsbeispiel der Figuren 1 bis 6 weist die Ausstanzung 2 sechs Zungen 3 auf, während beim in den Figuren 7 bis 11 dargestellten Ausführungsbeispiel für Lamellenrippen 1 mit Rohren 9 mit kleinerem Durchmesser bei jeder Ausstanzung 2 nur drei Zungen 3 vorgesehen sind. Im Prinzip ist aber die Gestaltung entsprechend der Ausführungsform der Figuren 1 bis 6 so, daß sich eine nähere Beschreibung hier erübrigt.In the embodiment of Figures 1 to 6, the punch 2 has six tongues 3, while in the embodiment shown in Figures 7 to 11 for lamellar fins 1 with tubes 9 with a smaller diameter only three tongues 3 are provided for each punch 2. In principle, however, the design according to the embodiment of Figures 1 to 6 is such that a detailed description is unnecessary here.

Claims (6)

1. Wärmetauscher mit Lamellenrippen (1), die durch ausgeformte Kragen (8) der Lamellenrippen (1) im Abstand voneinander und parallel zueinander gehalten sind und die in Durchzügen (2′) der Kragen (8) von parallel zueinander verlaufenden Rohren (9) durchdrungen sind, wobei jeweils die Innendurchmesser des Durchzugs (2′) an den Außendurchmesser des Rohrs (9) angepaßt ist und am Außenumfang des Rohrs (9) mindestens teilweise anleigt, dadurch gekennzeichnet, daß am durchgezogenen Rand des Durchzugs (2′) am Umfang verteilt Zungen (3) angeordnet sind, daß die freien Enden der Zungen (9) in einem Winkel zum den Durchzug (2′) durchragenden Rohr (9) abgewinkelt sind und daß diese abgewinkelten Zungen (9) Distanzanlageflächen (6) für die anschließende Lamellenrippe (1) abgeben.1. Heat exchanger with fins (1), which are held by molded collars (8) of the fins (1) at a distance from each other and parallel to each other and in passages (2 ') of the collar (8) of parallel tubes (9) are penetrated, wherein the inner diameter of the passage (2 ') is adapted to the outer diameter of the tube (9) and at least partially abuts on the outer circumference of the tube (9), characterized in that on the solid edge of the passage (2') on the circumference Distributed tongues (3) are arranged so that the free ends of the tongues (9) are angled at an angle to the passage (2 ') projecting tube (9) and that these angled tongues (9) spacer surfaces (6) for the subsequent lamellar rib Submit (1). 2. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, daß der Winkel der abgewinkelten Zungen (9) gegenüber dem Rohr (9) 90° beträgt.2. Heat exchanger according to claim 1, characterized in that the angle of the angled tongues (9) relative to the tube (9) is 90 °. 3. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand (5) der Distanzanlageflächen (6) von der Lamellengrundfläche (7) durch ein Kalibrierpressen bei allen Distanzanlageflächen (6) der Lamellenrippe (1) gleich ist.3. Heat exchanger according to claim 1, characterized in that the distance (5) of the spacer surfaces (6) from the lamella base (7) by a calibration press for all spacer surfaces (6) of the fin (1) is the same. 4. Wärmetauscher nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in Abhängigkeit vom Rohrdurchmesser die Anzahl der angeordneten Zungen (3) bei größerem Rohrdurchmesser größer ist als bei kleinerem Rohrdurchmesser.4. Heat exchanger according to one of claims 1 to 3, characterized in that, depending on the tube diameter, the number of tongues (3) is greater for a larger tube diameter than for a smaller tube diameter. 5. Wärmetauscher nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die größte Außenabmessung der Ausstanzung (2) vor dem Durchziehen kleiner ist als der Außendurchmesser (10) des Rohrs.5. Heat exchanger according to one of claims 1 to 4, characterized in that the largest outer dimension of the punched out (2) is smaller than the outer diameter (10) of the tube before being pulled through. 6. Verfahren zur Herstellung der Lamellenrippe (1) für einen Wärmetauscher nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Lamellenrippen (1) mit sternförmigen Ausstanzungen (2) versehen, dann die Ränder dieser Ausstanzungen (2) mit ihren durch die Sternform gebildeten Zungen (3) um 90° mittels Durchziehstempeln zu Kragen durchgezogen und anschließend die Zungen (3) über mindestens einen wesentlichen Teil ihrer Länge zur Bildung der Distnzanlageflächen (6) nach außen abgewinkelt werden.6. A process for the manufacture of the fins (1) for a heat exchanger according to one or more of claims 1 to 5, characterized in that the fins (1) are provided with star-shaped punchings (2), then the edges of these punchings (2) with their tongues (3) formed by the star shape are pulled through 90 ° by means of pull-through punches and then the tongues (3) are angled outwards over at least a substantial part of their length to form the distance contact surfaces (6).
EP88109600A 1987-08-29 1988-06-16 Heat exchanger with lamella fins Expired - Lifetime EP0305665B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3728969 1987-08-29
DE19873728969 DE3728969A1 (en) 1987-08-29 1987-08-29 HEAT EXCHANGER WITH FINAL RIBS

Publications (2)

Publication Number Publication Date
EP0305665A1 true EP0305665A1 (en) 1989-03-08
EP0305665B1 EP0305665B1 (en) 1992-04-15

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EP88109600A Expired - Lifetime EP0305665B1 (en) 1987-08-29 1988-06-16 Heat exchanger with lamella fins

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EP (1) EP0305665B1 (en)
DE (3) DE8717766U1 (en)

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DE102010038945A1 (en) * 2010-08-05 2012-02-09 Behr Gmbh & Co. Kg Plate-shaped heat exchanger for a, at least one heat exchanger package having cooling device
WO2019062493A1 (en) * 2017-09-30 2019-04-04 杭州三花微通道换热器有限公司 Heat exchanger and fin
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Publication number Priority date Publication date Assignee Title
DE2307059A1 (en) * 1972-02-18 1973-08-23 Luwa Ag HEAT EXCHANGER ELEMENT AND METHOD FOR MANUFACTURING IT
DE2527147A1 (en) * 1975-06-18 1976-12-30 Hitachi Ltd Air conditioning heat exchanger with plates - having cross flow pipes with slot type projections punched into plate
EP0079090A1 (en) * 1981-11-10 1983-05-18 Asea Brown Boveri Ag Series arranged pipe bundle heat exchanger
US4428418A (en) * 1982-05-17 1984-01-31 Chromalloy American Corporation Heat exchanger fin element with folded over side edges

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DE3728969A1 (en) 1989-03-09
US5117905A (en) 1992-06-02
DE8717766U1 (en) 1990-03-15
DE3870102D1 (en) 1992-05-21
EP0305665B1 (en) 1992-04-15

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