EP1469270B1 - Plate heat exchanger with double-walled heat exchanger plates - Google Patents

Plate heat exchanger with double-walled heat exchanger plates Download PDF

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Publication number
EP1469270B1
EP1469270B1 EP04008894A EP04008894A EP1469270B1 EP 1469270 B1 EP1469270 B1 EP 1469270B1 EP 04008894 A EP04008894 A EP 04008894A EP 04008894 A EP04008894 A EP 04008894A EP 1469270 B1 EP1469270 B1 EP 1469270B1
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EP
European Patent Office
Prior art keywords
heat exchanger
plate
double
exchanger plates
walled
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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.)
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EP04008894A
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German (de)
French (fr)
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EP1469270A1 (en
Inventor
Peter Dipl.-Ing. Rehberg
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Kelvion Brazed PHE GmbH
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GEA WTT GmbH
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Priority to PL04008894T priority Critical patent/PL1469270T3/en
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    • 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
    • F28D9/0031—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 the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—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 the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—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 the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • 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
    • F28F3/005—Arrangements for preventing direct contact between different heat-exchange media
    • 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
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/16—Safety or protection arrangements; Arrangements for preventing malfunction for preventing leakage

Definitions

  • the invention is in the field of plate heat exchangers.
  • plate heat exchangers are known with a stack of double-walled heat exchanger plates.
  • the double-walled heat exchanger plates of the stack are permanently connected to one another, in particular by means of soldering, and each have two plate elements with a central heat transfer section and a raised to the plane of the central heat transfer section edge portion.
  • Separate flow spaces for at least two heat exchanger fluids are formed between the double-walled heat exchanger plates.
  • the at least two heat exchanger fluids for heat transfer on each different sides along the central heat transfer sections of the stacked heat exchanger plates are led past each other.
  • the two plate elements come into close contact at least in the region of the central heat transfer section and at least partially in the region of the raised edge section.
  • the two plate elements of a double-walled heat exchanger plate are brought into contact in the region of the central heat transfer section and the raised edge, in that heat exchanger fluid which, due to the leak in one of the plate elements, reaches the raised edge sections between the two plate elements, can exit through an opening between the raised edge sections.
  • heat exchanger fluid which emerges through the leak, visible in the edge region of the heat exchanger plate to the outside.
  • soldering material which is liquid during soldering, should be collected and held with the aid of the known edge design in spacing spaces between the outer, outwardly projecting edges of adjacent plate elements, which belong to two different heat transferring plates arranged one behind the other in the stack.
  • a heat exchanger which is formed from a stack of several superimposed heat exchanger plates.
  • the heat exchanger plates are arranged so that form between them first fürflußsammlung and second flow spaces.
  • the document DE 36 00 656 also discloses a heat exchanger of a plurality of heat exchanger plates.
  • the heat exchange surface of each heat exchanger plate is flushed on one side by a heat exchange means and on the other side by another heat exchange means.
  • the object of the invention is to provide an improved plate heat exchanger with a stack of double-walled heat transfer plates, in which the leak detection is facilitated.
  • the invention includes the idea to provide a plate heat exchanger with a stack of double-walled heat exchanger plates which are permanently interconnected and each having two plate members with a central heat transfer section and a raised to the plane of the central heat transfer section edge portion, wherein between the double-walled heat transfer plates of the stack separate flow spaces for at least two heat exchanger fluids are formed, the two plate elements in the region of the central heat transfer section and the raised edge come at least partially close to the plant, so that heat exchanger fluid, which passes between the plate elements to the superscript edge portions, through an opening between the superscript edge portions can emerge, and at the respective raised edge portion an outer edge is formed.
  • An expedient embodiment of the invention can provide that outer edges of adjacent plate elements of two arranged in the stack next to each other, double-walled heat exchanger plates are each arranged closely adjacent to each other. In this way, the stack-like storage of the plurality of double-walled heat exchanger plates at a predetermined distance from each other is facilitated.
  • a preferred embodiment of the invention provides that adjacent double-walled heat exchanger plates are connected to each other in a fluid-tight manner along adjacent elevated edge sections.
  • FIG. 1 shows a schematic representation of a plurality of successively arranged heat exchanger plates 1, 2, 3, 4, each having through holes 5, 6, 7, 8.
  • the heat exchanger plates 1-4 are each designed as a double-walled heat exchanger plate with two plate elements, which at least in a central heat transfer section 9 closely abut each other to ensure efficient heat transfer between at least two heat exchanger fluids, the inclusion of the through holes 5-8 separate flow chambers in one based on the plurality of heat exchanger plates 1-4 formed plate heat exchanger flow through.
  • This is the usual structure and the usual operation of plate heat exchangers with double-walled heat exchanger plates.
  • the heat exchanger plates 1-4 each in FIG. 1 schematically indicated surface contours 10 on.
  • the heat exchanger plates 1-4 are according to FIG. 1 are rotated alternately by 180 ° in order to space with the aid of the surface contours 10 successively arranged heat exchanger plates from each other, so that the separate flow spaces for the at least two heat exchanger fluids can be formed.
  • FIGS. 2a and 2 B show a schematic representation of a Platten Officerauertragers 20 with a plurality of stacked, double-walled heat transfer plates of the kind as in FIG. 1 are shown schematically in a front and a side view.
  • inflow and outflow nozzles 21, 22 and 23, 24 are provided for introducing / discharging the at least two heat exchanger fluids.
  • FIG. 3 shows a sectional view of a portion in the edge region of Plattendeciremübertragers 20 in FIG. 2a along a line AA '.
  • the heat exchanger plates 30, 31, 32 are shown, which each have two plate elements 33, 34.
  • the two plate elements 33, 34 come into close contact with each other in a central heat transfer section 35, which continues in a region of a respective edge section 36 raised to the plane of the central heat transfer section 35.
  • an outer edge 33a, 34a is formed in each case, which is bent in the illustrated embodiment to the outside.
  • a gap 37 is formed, so that the outer edges 33a, 34a are spaced, preferably so that a capillary-breaking spacing is formed.
  • heat exchanger plates 30, 31, 32 adjacent heat transfer plates 30 and 31 or 31 and 32 are soldered together in the region of the respective raised edge portions 36 with the aid of solder 39.
  • the soldering material 39 can pass through capillary action into an end portion 40 between the outer edges 33a, 34a.
  • the outer edges 34a, 33a of adjacent heat exchanger plates are spaced (not shown).
  • the embodiment described in the region of the outer edges 33a, 34a may be provided for all or only part of the double-walled heat exchanger plates of a plate heat exchanger.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

A plate type heat exchanger comprising a stack of double walled heat exchanger plates which are permanently interconnected and each include two plate members having a central heat transfer portion and an edge portion bent upwardly with respect to the plane of the central heat transfer portion, separate flow passage spaces for at least two heat exchange fluids being defined between the double walled heat exchanger plates, the two plate members entering into close mutual engagement at least partly in the area of the central heat transfer and the upwardly bent edge portion yet permitting heat exchange fluid between the plate members which gets to the upwardly bent edge portions to exit through an aperture between the upwardly bent edge portions, the upwardly bent edge portions being formed respectively with an outer edge. The respective outer edges of the two plate members of the double walled heat exchanger plates are spaced from each other.

Description

Die Erfindung liegt auf dem Gebiet von Plattenwärmeübertragern.The invention is in the field of plate heat exchangers.

Als eine mögliche Bauform sind Plattenwärmeübertrager mit einem Stapel doppelwandiger Wärmeübertragerplatten bekannt. Bei dieser Art von Plattenwärmeübertragern sind die doppelwandigen Wärmeübertragerplatten des Stapels dauerhaft miteinander verbunden, insbesondere mittels Lötens, und weisen jeweils zwei Plattenelemente mit einem zentralen Wärmeübergangsabschnitt und einem zur Ebene des zentralen Wärmeübergangsabschnitts hochgestellten Randabschnitt auf. Zwischen den doppelwandigen Wärmeübertragerplatten sind getrennte Durchflußräume für wenigstens zwei Wärmetauscher-Fluide gebildet. Mit Hilfe der getrennten Durchflußräume werden die wenigstens zwei Wärmetauscher-Fluide zur Wärmeübertragung auf jeweils verschiedenen Seiten entlang der zentralen Wärmeübergangsabschnitte der gestapelten Wärmeübertragerplatten aneinander vorbei geführt. Zum Ausbilden einer effizienten Wärmeübertragung kommen die beiden Plattenelemente zumindest im Bereich des zentralen Wärmeübergangsabschnitts und wenigstens teilweise im Bereich des hochgestellten Randabschnitts eng zur Anlage.As a possible design plate heat exchangers are known with a stack of double-walled heat exchanger plates. In this type of plate heat exchangers, the double-walled heat exchanger plates of the stack are permanently connected to one another, in particular by means of soldering, and each have two plate elements with a central heat transfer section and a raised to the plane of the central heat transfer section edge portion. Separate flow spaces for at least two heat exchanger fluids are formed between the double-walled heat exchanger plates. With the help of the separate flow spaces, the at least two heat exchanger fluids for heat transfer on each different sides along the central heat transfer sections of the stacked heat exchanger plates are led past each other. To form an efficient heat transfer, the two plate elements come into close contact at least in the region of the central heat transfer section and at least partially in the region of the raised edge section.

Mit Hilfe der doppelwandigen Ausbildung der Wärmeübertragerplatten wird ein erhöhter Sicherheitsstandard gewährleistet, da selbst beim Auftreten eines Lecks in einem der beiden Plattenelemente einer Wärmeübertragerplatte ein Vermischen der wenigstens zwei Wärmetauscher-Fluide verhindert wird, sofern das zweite Plattenelement der Wärmeübertragerplatte keinerlei Leck aufweist.With the aid of the double-walled design of the heat exchanger plates, an increased safety standard is ensured, since even if a leak occurs in one of the two plate elements of a heat exchanger plate, mixing of the at least two heat exchanger fluids is prevented, provided that the second plate element of the heat exchanger plate has no leak.

Um für den Fall, daß ein Leck in einem der Plattenelemente auftritt, diese Beschädigung für Überwachungs- und Betriebspersonal außen an dem Plattenwärmeübertrager sichtbar zu machen, sind die beiden Plattenelemente einer doppelwandigen Wärmeübertragerplatte im Bereich des zentralen Wärmeübergangsabschnitts und des hochgestellten Randes so zur Anlage gebracht, daß Wärmetauscher-Fluid, was aufgrund des Lecks in einer der Plattenelemente zwischen den beiden Plattenelementen zu den hochgestellten Randabschnitten gelangt, durch eine Öffnung zwischen den hochgestellten Randabschnitten austreten kann. Hierdurch wird Wärmetauscher-Fluid, welches durch das Leck austritt, im Randbereich der Wärmeübertragerplatte nach außen sichtbar.In order, in the event that a leak occurs in one of the plate elements, to make this damage visible to monitoring and operating personnel on the outside of the plate heat exchanger, the two plate elements of a double-walled heat exchanger plate are brought into contact in the region of the central heat transfer section and the raised edge, in that heat exchanger fluid which, due to the leak in one of the plate elements, reaches the raised edge sections between the two plate elements, can exit through an opening between the raised edge sections. As a result, heat exchanger fluid which emerges through the leak, visible in the edge region of the heat exchanger plate to the outside.

Aus der Druckschrift DE 691 06 354 ist ein gelöteter Plattenwärmeübertrager mit doppelwandigen Wärmeübertragerplatten bekannt, bei denen an dem hochgestellten Rand der beiden Plattenelemente der doppelwandigen Wärmeübertragerplatten jeweils ein äußerer Rand angeformt ist, der nach außen absteht. Die äußeren Ränder der beiden Plattenelemente jeder Wärmeübertragerplatte sind eng aneinanderliegend angeordnet, wohingegen die äußeren Ränder benachbarter Plattenelemente, die zu zwei im Stapel hintereinander angeordneten Wärmeübertragerplatten gehören, beabstandet sind. Diese Art der Randgestaltung ist vorgesehen, um beim Lötvorgang zum Verbinden der Wärmeübertragerplatten des Stapels doppelwandiger Wärmeübertragerplatten das unerwünschte Eindringen von Lötmaterial zwischen den in der jeweiligen Wärmeübertragerplatte eng aneinander zur Anlage kommenden Plattenelementen zu vermeiden, was sonst den Austritt von Leckflüssigkeit behindern könnte. Das beim Löten flüssige Lötmaterial soll mit Hilfe der bekannten Randgestaltung in Abstandsräumen zwischen den äußeren, nach außen abstehenden Rändern benachbarter Plattenelemente, die zu zwei verschiedenen, im Stapel hintereinander angeordneten Wärmeübertragerplatten gehören, gesammelt und gehalten werden.From the publication DE 691 06 354 a soldered plate heat exchanger with double-walled heat exchanger plates is known in which at the raised edge of the two plate elements of the double-walled heat exchanger plates in each case an outer edge is formed, which protrudes to the outside. The outer edges of the two plate members of each heat exchanger plate are arranged close together, whereas the outer edges of adjacent plate members which belong to two stacked heat exchanger plates in the stack are spaced apart. This type of edge design is provided to prevent the soldering process for connecting the heat exchanger plates of the stack of double-walled heat transfer plates unwanted penetration of solder between the close in the respective heat exchanger plate close to the plant plate elements, which could otherwise hinder the leakage of leakage. The soldering material, which is liquid during soldering, should be collected and held with the aid of the known edge design in spacing spaces between the outer, outwardly projecting edges of adjacent plate elements, which belong to two different heat transferring plates arranged one behind the other in the stack.

In dem Dokument GB647 678 A wird ein Wärmeübertrager offenbart, welcher aus einem Stapel mehrer übereinander angeordneter Wärmeübertragerplatten gebildet ist. Die Wärmeübertragerplatten sind so angeordnet, daß sich zwischen Ihnen erste Durchflußräume und zweite Durchflußräume bilden.In the document GB647 678 A a heat exchanger is disclosed, which is formed from a stack of several superimposed heat exchanger plates. The heat exchanger plates are arranged so that form between them first Durchflußräume and second flow spaces.

Das Dokument DE 36 00 656 offenbart ebenfalls einen Wärmetauscher aus mehreren Wärmetauscherplatten. Bei dem bekannten Wärmetauscher ist die Wärmeaustauschfläche einer jeden Wärmetauscherplatte auf der einen Seite von einem Wärmetauscher-Mittel und auf der anderen Seite von einem anderen Wärmetauscher-Mittel bespült.The document DE 36 00 656 also discloses a heat exchanger of a plurality of heat exchanger plates. In the known heat exchanger, the heat exchange surface of each heat exchanger plate is flushed on one side by a heat exchange means and on the other side by another heat exchange means.

In dem Dokument US-B1-6 478 081 wird ein Wärmeübertrager aus einem Stapel von Wärmeübertragerplatten beschrieben, welche erste Durchflußräume für einen ersten Wärmetauscher-Fluid und zweite Durchflußräume für einen zweiten Wärmetauscher-Fluid voneinander trennten.In the document US-B1-6 478 081 a heat exchanger is described from a stack of heat exchanger plates, which separated first flow spaces for a first heat exchange fluid and second flow spaces for a second heat exchange fluid from each other.

Aufgabe der Erfindung ist es, einen verbesserten Plattenwärmeübertrager mit einem Stapel doppelwandiger Wärmeübertragerplatten anzugeben, bei dem die Lecksuche erleichtert ist. Die Erfindung umfaßt den Gedanken, einen Plattenwärmeübertrager mit einem Stapel doppelwandiger Wärmeübertragerplatten vorzusehen, die dauerhaft miteinander verbunden sind und jeweils zwei Plattenelemente mit einem zentralen Wärmeübergangsabschnitt und einem zur Ebene des zentralen Wärmeübergangsabschnitts hochgestellten Randabschnitt aufweisen, wobei zwischen den doppelwandigen Wärmeübertragerplatten des Stapels getrennte Durchflußräume für wenigstens zwei Wärmetauscher-Fluide gebildet sind, die beiden Plattenelemente im Bereich des zentralen Wärmeübergangsabschnitts und des hochgestellten Randes zumindest teilweise eng zur Anlage kommen, so daß jedoch Wärmetauscher-Fluid, was zwischen den Plattenelementen zu den hochgestellten Randabschnitten gelangt, durch eine Öffnung zwischen den hochgestellten Randabschnitten austreten kann, und an dem jeweiligen hochgestellten Randabschnitt ein äußerer Rand angeformt ist. Die äußeren Ränder der beiden Plattenelemente der doppelwandigen Wärmeübertragerplatten sind jeweils beabstandet. Auf diese Weise wird Wärmetauscher-Fluid, das infolge eines Lecks in einer der beiden Plattenelemente einer doppelwandigen Wärmeübertragerplatte zwischen die beiden Plattenelemente gelangt, bei einer Dichtigkeitskontrolle des Plattenwärmeübertragers bereits in einem Austrittsbereich sichtbar, in dem die hochgestellten Randabschnitte der beiden Plattenelemente eng aneinander liegen. Gegenüber den bekannten Plattenwärmeübertragem, bei denen die äußeren Ränder der beiden Plattenelemente der Wärmeübertragerplatte eng aufeinander liegen, ergibt sich so insbesondere der Vorteil, daß ein Leck auch dann von außen für das Überwachungs- und Betriebspersonal sichtbar wird, wenn infolge des Lecks zwischen die Plattenelemente der Wärmeübertragerplatte Wärmetauscher-Fluid nur in einem geringen Umfang gelangt, welcher nicht zum Austritt des Wärmetauscher-Fluids in dem Bereich der äußeren Ränder führt. Hierdurch werden bei der Überwachung des Plattenwärmeübertragers bereits kleinere Lecks von außen erkennbar.The object of the invention is to provide an improved plate heat exchanger with a stack of double-walled heat transfer plates, in which the leak detection is facilitated. The invention includes the idea to provide a plate heat exchanger with a stack of double-walled heat exchanger plates which are permanently interconnected and each having two plate members with a central heat transfer section and a raised to the plane of the central heat transfer section edge portion, wherein between the double-walled heat transfer plates of the stack separate flow spaces for at least two heat exchanger fluids are formed, the two plate elements in the region of the central heat transfer section and the raised edge come at least partially close to the plant, so that heat exchanger fluid, which passes between the plate elements to the superscript edge portions, through an opening between the superscript edge portions can emerge, and at the respective raised edge portion an outer edge is formed. The outer edges of the two plate elements of the double-walled heat exchanger plates are each spaced. In this way, heat exchanger fluid, which passes as a result of a leak in one of the two plate elements of a double-walled heat exchanger plate between the two plate elements, visible at a tightness control of Plattenwärmeübertragers in an outlet region in which the superscript edge portions of the two plate elements close together. Compared to the known Plattenwärmeübertragem, in which the outer edges of the two plate elements of the heat exchanger plate are close to each other, this results in particular the advantage that a leak is then visible from the outside for the monitoring and operating personnel, if due to the leak between the plate elements of Heat exchanger plate heat exchanger fluid passes only to a small extent, which does not lead to the exit of the heat exchanger fluid in the region of the outer edges. As a result, small leaks from the outside can be detected when monitoring the plate heat exchanger.

Eine zweckmäßige Ausgestaltung der Erfindung kann vorsehen, daß äußere Ränder benachbarter Plattenelemente von zwei im Stapel nebeneinander angeordneten, doppelwandigen Wärmeübertragerplatten jeweils eng aneinander anliegend angeordnet sind. Auf diese Weise wird die stapelartige Lagerung der mehreren doppelwandigen Wärmeübertragerplatten in vorgegebenen Abstand zueinander erleichtert.An expedient embodiment of the invention can provide that outer edges of adjacent plate elements of two arranged in the stack next to each other, double-walled heat exchanger plates are each arranged closely adjacent to each other. In this way, the stack-like storage of the plurality of double-walled heat exchanger plates at a predetermined distance from each other is facilitated.

Zur zweckmäßigen Ausgestaltung der getrennten Durchflußräume für die wenigstens zwei Wärmetauscher-Fluide sieht eine bevorzugte Ausführungsform der Erfindung vor, daß benachbarte doppelwandige Wärmeübertragerplatten entlang benachbarter hochgestellter Randabschnitte miteinander fluiddicht verbunden sind.For an expedient embodiment of the separate flow chambers for the at least two heat exchanger fluids, a preferred embodiment of the invention provides that adjacent double-walled heat exchanger plates are connected to each other in a fluid-tight manner along adjacent elevated edge sections.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf eine Zeichnung näher erläutert. Hierbei zeigen:

Figur 1
eine schematische Darstellung von mehreren Wärmeübertragerplatten;
Figuren 2a und 2b
einen Plattenwärmeübertrager in Vorder- bzw. Seitenansicht; und
Figur 3
eine Schnittdarstellung eines Randbereichs des Plattenwärmeübertra- gers entlang einer Linie AA' in Figur 2a.
The invention is explained below with reference to embodiments with reference to a drawing. Hereby show:
FIG. 1
a schematic representation of several heat exchanger plates;
FIGS. 2a and 2b
a plate heat exchanger in front or side view; and
FIG. 3
a sectional view of an edge region of the plate heat exchanger along a line AA 'in FIG. 2a ,

Figur 1 zeigt eine schematische Darstellung von mehreren hintereinander angeordneten Wärmeübertragerplatten 1, 2, 3, 4, die jeweils Durchgangsöffnungen 5, 6, 7, 8 aufweisen. Die Wärmeübertragerplatten 1-4 sind jeweils als eine doppelwandige Wärmeübertragerplatte mit zwei Plattenelementen ausgeführt, die zumindest in einem zentralen Wärmeübergangsabschnitt 9 eng aneinander zur Anlage kommen, um eine effiziente Wärmeübertragung zwischen wenigstens zwei Wärmetauscher-Fluiden zu gewährleisten, die unter Einbindung der Durchgangsöffnungen 5-8 getrennte Durchflußräume in einem auf Basis der mehreren Wärmeübertragerplatten 1-4 gebildeten Plattenwärmeübertrager durchströmen. Es handelt sich hierbei um den üblichen Aufbau und die übliche Funktionsweise von Plattenwärmeübertragern mit doppelwandigen Wärmeübertragerplatten. Die Wärmeübertragerplatten 1-4 weisen jeweils in Figur 1 schematisch angedeutete Oberflächenkonturen 10 auf. Die Wärmeübertragerplatten 1-4 sind gemäß Figur 1 abwechselnd um 180° gedreht sind, um mit Hilfe der Oberflächenkonturen 10 hintereinander angeordnete Wärmeübertragerplatten voneinander zu beabstanden, so daß die getrennten Durchflußräume für die wenigstens zwei Wärmetauscher-Fluide gebildet werden können. FIG. 1 shows a schematic representation of a plurality of successively arranged heat exchanger plates 1, 2, 3, 4, each having through holes 5, 6, 7, 8. The heat exchanger plates 1-4 are each designed as a double-walled heat exchanger plate with two plate elements, which at least in a central heat transfer section 9 closely abut each other to ensure efficient heat transfer between at least two heat exchanger fluids, the inclusion of the through holes 5-8 separate flow chambers in one based on the plurality of heat exchanger plates 1-4 formed plate heat exchanger flow through. This is the usual structure and the usual operation of plate heat exchangers with double-walled heat exchanger plates. The heat exchanger plates 1-4 each in FIG. 1 schematically indicated surface contours 10 on. The heat exchanger plates 1-4 are according to FIG. 1 are rotated alternately by 180 ° in order to space with the aid of the surface contours 10 successively arranged heat exchanger plates from each other, so that the separate flow spaces for the at least two heat exchanger fluids can be formed.

Die Figuren 2a und 2b zeigen eine schematische Darstellung eines Plattenwärmeübertragers 20 mit mehreren gestapelten, doppelwandigen Wärmeübertragerplatten von der Art, wie sie in Figur 1 schematisch gezeigt sind, in einer Vorder- bzw. einer Seitenansicht. Zum Einführen/Abführen der wenigstens zwei Wärmetauscher-Fluide sind Zufluß- und Ablußstutzen 21, 22 sowie 23, 24 vorgesehen.The FIGS. 2a and 2 B show a schematic representation of a Plattenwärmeübertragers 20 with a plurality of stacked, double-walled heat transfer plates of the kind as in FIG. 1 are shown schematically in a front and a side view. For introducing / discharging the at least two heat exchanger fluids, inflow and outflow nozzles 21, 22 and 23, 24 are provided.

Figur 3 zeigt eine Schnittdarstellung eines Abschnitts im Randbereich des Plattenwäremübertragers 20 in Figur 2a entlang einer Linie AA'. Von den mehreren doppelwandigen Wärmeübertragerplatten, die der Plattenwärmeübertrager 20 aufweist, sind in Figur 3 beispielhaft die Wärmeübertragerplatten 30, 31, 32 gezeigt, die jeweils zwei Plattenelemente 33, 34 aufweisen. Die beiden Plattenelemente 33, 34 kommen in einem zentralen Wärmeübergangsabschnitt 35 eng aneinander zur Anlage, was sich in einem Bereich eines jeweiligen zur Ebene des zentralen Wärmeübergangsabschnitts 35 hochgestellten Randabschnitts 36 fortsetzt. FIG. 3 shows a sectional view of a portion in the edge region of Plattenwäremübertragers 20 in FIG. 2a along a line AA '. Of the several double-walled heat transfer plates that the plate heat exchanger 20 has, are in FIG. 3 by way of example, the heat exchanger plates 30, 31, 32 are shown, which each have two plate elements 33, 34. The two plate elements 33, 34 come into close contact with each other in a central heat transfer section 35, which continues in a region of a respective edge section 36 raised to the plane of the central heat transfer section 35.

An dem hochgestellten Randabschnitt 36 der beiden Plattenelemente 33, 34 ist jeweils ein äußerer Rand 33a, 34a angeformt, welcher bei der dargestellten Ausführungsform nach außen umgebogen ist. Benachbarte äußere Ränder 33a, 34a von benachbarten Wärmeübertragerplatten, beispielsweise von den Wärmeübertragerplatten 30 und 31 oder den Wärmeübertragerplatten 31 und 32, sind eng aneinander liegend angeordnet. Demgegenüber ist zwischen äußeren Rändern 33a, 34a der jeweiligen Wärmeübertragerplatte 30, 31 bzw. 32 ein Zwischenraum 37 gebildet, so daß die äußeren Ränder 33a, 34a beabstandet sind, bevorzugt so, daß eine kapillarbrechende Beabstandung gebildet ist. Auf diese Weise tritt Wärmetauscher-Fluid, welches durch ein Leck in einer der beiden Plattenelemente der Wärmeübertragerplatten 30, 31, 32 zwischen die jeweiligen Plattenelemente 33, 34 gelangt, bereits in einem Bereich 38 zwischen den beiden Plattenelementen 33, 34 für das Überwachungs- und Betriebspersonal von außen sichtbar hervor.At the raised edge portion 36 of the two plate members 33, 34, an outer edge 33a, 34a is formed in each case, which is bent in the illustrated embodiment to the outside. Adjacent outer edges 33a, 34a of adjacent heat exchanger plates, for example of the heat exchanger plates 30 and 31 or the heat exchanger plates 31 and 32, are arranged close to each other. In contrast, between the outer edges 33a, 34a of the respective heat exchanger plate 30, 31 and 32, a gap 37 is formed, so that the outer edges 33a, 34a are spaced, preferably so that a capillary-breaking spacing is formed. In this way, heat exchanger fluid which passes through a leak in one of the two plate elements of the heat exchanger plates 30, 31, 32 between the respective plate elements 33, 34, already in a region 38 between the two plate elements 33, 34 for the monitoring and Operating personnel visible from the outside.

Von den Wärmeübertragerplatten 30, 31, 32 sind benachbarte Wärmeübertragerplatten 30 und 31 bzw. 31 und 32 im Bereich der jeweils hochgestellten Randabschnitte 36 mit Hilfe von Lötmaterial 39 miteinander verlötet. Das Lötmaterial 39 kann hierbei durch Kapillarwirkung bis in einen Endabschnitt 40 zwischen den äußeren Rändern 33a, 34a gelangen. Es kann jedoch auch vorgesehen sein, daß die äußeren Ränder 34a, 33a benachbarter Wärmeübertragerplatten beabstandet sind (nicht dargestellt).Of the heat exchanger plates 30, 31, 32 adjacent heat transfer plates 30 and 31 or 31 and 32 are soldered together in the region of the respective raised edge portions 36 with the aid of solder 39. The soldering material 39 can pass through capillary action into an end portion 40 between the outer edges 33a, 34a. However, it may also be provided that the outer edges 34a, 33a of adjacent heat exchanger plates are spaced (not shown).

Die beschriebene Ausführung im Bereich der äußeren Ränder 33a, 34a kann für alle oder nur einen Teil der doppelwandigen Wärmeübertragerplatten eines Plattenwärmeübertragers vorgesehen sein.The embodiment described in the region of the outer edges 33a, 34a may be provided for all or only part of the double-walled heat exchanger plates of a plate heat exchanger.

Claims (3)

  1. A plate-type heat exchanger comprising a stack of double-walled heat exchanger plates (30 - 32) which are permanently interconnected and each include two plate members (33, 34) having a central heat transfer portion (35) and an edge portion (36) bent upwardly with respect to the plane of the central heat transfer portion (35), separate flow passage spaces for at least two heat exchange fluids being defined between the double-walled heat exchanger plates (30 - 32), the two plate members (33, 34) entering into close mutual engagement at least partly in the area of the central heat transfer portion (35) and the upwardly bent edge portion (36) yet permitting heat exchange fluid between the plate members which gets to the upwardly bent edge portions (36) to exit through an aperture between the upwardly bent edge portions (36), the upwardly bent edge portions (36) being formed respectively with an outer edge (33a, 34a), characterized in that the respective outer edges (33a, 34a) of the two plate members (33, 34) of the double-walled heat exchanger plates (30 - 32) are spaced from each other.
  2. The plate-type heat exchanger as claimed in claim 1, characterized in that outer edges (33a, 34a) of adjacent plate members (33, 34) of two neighboring double-walled heat exchanger plates (30, 31; 31, 32) in the stack are disposed in close mutual engagement.
  3. The plate-type heat exchanger as claimed in claim 1 or 2, characterized in that neighboring double-walled heat exchanger plates (30, 31; 31, 32) are interconnected in fluid-tight fashion along adjacent upwardly bent edge portions (36).
EP04008894A 2003-04-14 2004-04-14 Plate heat exchanger with double-walled heat exchanger plates Expired - Lifetime EP1469270B1 (en)

Priority Applications (1)

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DE10317263.7A DE10317263B4 (en) 2003-04-14 2003-04-14 Plate heat exchanger with double-walled heat exchanger plates
DE10317263 2003-04-14

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EP1469270B1 true EP1469270B1 (en) 2011-02-09

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US (1) US7204297B2 (en)
EP (1) EP1469270B1 (en)
CN (1) CN1328563C (en)
AT (1) ATE498103T1 (en)
CA (1) CA2463795C (en)
DE (2) DE10317263B4 (en)
DK (1) DK1469270T3 (en)
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Publication number Publication date
US7204297B2 (en) 2007-04-17
EP1469270A1 (en) 2004-10-20
DE10317263B4 (en) 2019-05-29
NZ532299A (en) 2004-08-27
CN1550745A (en) 2004-12-01
CA2463795A1 (en) 2004-10-14
CN1328563C (en) 2007-07-25
HK1072803A1 (en) 2005-09-09
US20040200607A1 (en) 2004-10-14
CA2463795C (en) 2009-10-06
DE502004012169D1 (en) 2011-03-24
DK1469270T3 (en) 2011-05-23
ATE498103T1 (en) 2011-02-15
PL1469270T3 (en) 2011-07-29
DE10317263A1 (en) 2004-11-04
ES2361012T3 (en) 2011-06-13

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