EP1469270A1 - 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
EP1469270A1
EP1469270A1 EP04008894A EP04008894A EP1469270A1 EP 1469270 A1 EP1469270 A1 EP 1469270A1 EP 04008894 A EP04008894 A EP 04008894A EP 04008894 A EP04008894 A EP 04008894A EP 1469270 A1 EP1469270 A1 EP 1469270A1
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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.)
Granted
Application number
EP04008894A
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German (de)
French (fr)
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EP1469270B1 (en
Inventor
Peter Dipl.-Ing. Rehberg
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Kelvion Brazed PHE GmbH
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Lauer Ralf Dipl-Ing
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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 with a stack doppelwandiger Heat exchanger plates known.
  • this type of plate heat exchangers are the double-walled Heat exchanger plates of the stack permanently connected to each other, in particular by soldering, and each have two plate elements with a central heat transfer section and a raised to the level of the central heat transfer section Edge section on.
  • Between the double-walled heat exchanger plates are separate flow spaces for at least two heat exchanger fluids formed. With the help of separate flow spaces are the at least two heat exchanger fluids for heat transfer on each different sides along the central heat transfer sections the stacked heat exchanger plates led past each other.
  • the two plate elements come at least in the area the central heat transfer section and at least partially in the region of raised edge section close to the plant.
  • a soldered plate heat exchanger with double-walled Heat exchanger plates are known in which at the superscript edge of the two Plate elements of the double-walled heat exchanger plates each formed an outer edge is, which protrudes outward.
  • the outer edges of the two plate elements of each heat exchanger plate are arranged close together, whereas the outer edges adjacent plate elements leading to two in the stack successively arranged heat exchanger plates belong, are spaced.
  • This type of edge design is intended to doppelwandiger during soldering for connecting the heat exchanger plates of the stack Heat exchanger plates the unwanted penetration of solder between the in the respective heat exchanger plate close to each other coming to rest plate elements to avoid what otherwise could hinder the leakage of leakage.
  • the at Soldering liquid soldering material is intended with the help of the known edge design in Abstand toxic between the outer, outwardly projecting edges of adjacent plate elements, the belong to two different, in stack stacked heat transfer plates, collected and kept.
  • the object of the invention is an improved plate heat exchanger with a stack specify double-walled heat exchanger plates, in which the leak detection is facilitated.
  • the invention includes the idea of a plate heat exchanger with a stack of double-walled Provide heat exchanger plates that are permanently connected to each other and in each case two plate elements with a central heat transfer section and a have the edge portion raised to the plane of the central heat transfer section, wherein between the double-walled heat transfer plates of the stack separate flow spaces are formed for at least two heat exchanger fluids, the two plate elements in the area of the central heat transfer section and the raised edge at least partially come close to the plant, so that, however, heat exchanger fluid, what between the plate elements reaches the superscript edge portions, through an opening between the superscript margins 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.
  • An expedient embodiment of the invention may provide that outer edges adjacent Plate elements of two in the stack juxtaposed, double-walled Heat exchanger plates are each arranged closely adjacent to each other. In this way is the stack-like storage of several double-walled heat exchanger plates in predetermined Distance between each other easier.
  • FIG. 1 shows a schematic representation of a plurality of heat exchanger plates arranged one behind the other 1, 2, 3, 4, each having through holes 5, 6, 7, 8.
  • the Heat exchanger plates 1-4 are each as a double-walled heat exchanger plate with carried out two plate elements, at least in a central heat transfer section 9 come close to each other to ensure efficient heat transfer between to ensure at least two heat exchanger fluids, with the involvement of 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. It is about 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 point each in Figure 1 schematically indicated surface contours 10.
  • the heat exchanger plates 1-4 are rotated in accordance with Figure 1 alternately by 180 ° in order to use the surface contours 10 heat exchanger plates arranged one behind the other from each other, so that the separate flow spaces for the at least two heat exchanger fluids can be formed.
  • FIGs 2a and 2b show a schematic representation of a plate heat exchanger 20 with several stacked, double-walled heat transfer plates of the kind as in Figure 1 are shown schematically, in a front and a side view.
  • the at least two heat exchanger fluids are inflow and outflow ports 21, 22 and 23, 24 provided.
  • FIG. 3 shows a sectional view of a section in the edge region of the plate heat transfer device 20 in Figure 2a along a line AA '.
  • the Heat transfer plates 30, 31, 32 are shown, each having two plate elements 33, 34.
  • the two plate elements 33, 34 come in a central heat transfer section 35 close together to the plant, resulting in an area of a respective to the plane the central heat transfer section 35 raised edge portion 36 continues.
  • Adjacent outer edges 33a, 34a of adjacent heat transfer plates For example, from the heat exchanger plates 30 and 31 or the heat exchanger plates 31 and 32 are arranged close to each other.
  • a gap 37 formed so that the outer edges 33a, 34a are spaced, preferably so, a capillary-breaking spacing is formed.
  • heat exchanger fluid which by a leak in one of the two plate elements of the heat exchanger plates 30, 31, 32 passes between the respective plate elements 33, 34, already in one area 38 between the two plate members 33, 34 for the monitoring and operating personnel visible from the outside.
  • heat exchanger plates 30, 31, 32 are adjacent heat exchanger plates 30 and 31 and 31 and 32 in the region of the respective raised edge portions 36 with the aid of Solder 39 soldered together.
  • the soldering material 39 can in this case by capillary action reach into an end portion 40 between the outer edges 33a, 34a. It can, however also be provided that the outer edges 34a, 33a adjacent heat exchanger plates are spaced (not shown).
  • the described embodiment in the region of the outer edges 33a, 34a may be for all or only provided a part of the double-walled heat exchanger plates of a plate heat exchanger be.

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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 are plate heat exchangers with a stack doppelwandiger Heat exchanger plates known. In this type of plate heat exchangers are the double-walled Heat exchanger plates of the stack permanently connected to each other, in particular by soldering, and each have two plate elements with a central heat transfer section and a raised to the level of the central heat transfer section Edge section on. Between the double-walled heat exchanger plates are separate flow spaces for at least two heat exchanger fluids formed. With the help of separate flow spaces are the at least two heat exchanger fluids for heat transfer on each different sides along the central heat transfer sections the stacked heat exchanger plates led past each other. To train an efficient heat transfer, the two plate elements come at least in the area the central heat transfer section and at least partially in the region of raised edge section close to the plant.

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 help of the double-walled design of the heat exchanger plates is an increased safety standard guaranteed, even if a leak occurs in one of the two Plate elements of a heat exchanger plate mixing the at least two heat exchanger fluids is prevented, provided that the second plate member 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 the event that a leak occurs in one of the plate elements, this damage for To make monitoring and operating personnel visible on the outside of the plate heat exchanger, are the two plate elements of a double-walled heat exchanger plate in the area the central heat transfer section and the raised edge so to the plant brought that heat exchanger fluid, which due to the leak in one of the plate elements between the two plate elements reaches the superscript edge sections, through an opening between the raised edge portions can escape. This will Heat exchange fluid, which exits through the leak, in the edge region of the heat exchanger plate visible 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 document DE 691 06 354 a soldered plate heat exchanger with double-walled Heat exchanger plates are known in which at the superscript edge of the two Plate elements of the double-walled heat exchanger plates each formed an outer edge is, which protrudes outward. The outer edges of the two plate elements of each heat exchanger plate are arranged close together, whereas the outer edges adjacent plate elements leading to two in the stack successively arranged heat exchanger plates belong, are spaced. This type of edge design is intended to doppelwandiger during soldering for connecting the heat exchanger plates of the stack Heat exchanger plates the unwanted penetration of solder between the in the respective heat exchanger plate close to each other coming to rest plate elements to avoid what otherwise could hinder the leakage of leakage. The at Soldering liquid soldering material is intended with the help of the known edge design in Abstandräumen between the outer, outwardly projecting edges of adjacent plate elements, the belong to two different, in stack stacked heat transfer plates, collected and kept.

Aufgabe der Erfindung ist es, einen verbesserten Plattenwärmeübertrager mit einem Stapel doppelwandiger Wärmeübertragerplatten anzugeben, bei dem die Lecksuche erleichtert ist.The object of the invention is an improved plate heat exchanger with a stack specify double-walled heat exchanger plates, in which the leak detection is facilitated.

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 Plattenwärmeübertragern, 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 invention includes the idea of a plate heat exchanger with a stack of double-walled Provide heat exchanger plates that are permanently connected to each other and in each case two plate elements with a central heat transfer section and a have the edge portion raised to the plane of the central heat transfer section, wherein between the double-walled heat transfer plates of the stack separate flow spaces are formed for at least two heat exchanger fluids, the two plate elements in the area of the central heat transfer section and the raised edge at least partially come close to the plant, so that, however, heat exchanger fluid, what between the plate elements reaches the superscript edge portions, through an opening between the superscript margins 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. On This way, the heat exchanger fluid, due to a leak in one of the two plate elements a double-walled heat transfer plate between the two plate elements arrives, in a tightness control of the plate heat exchanger already in one Outlet area visible in which the raised edge portions of the two plate elements close together. Compared to the known Plattenwärmeübertragern in which the outer edges of the two plate elements of the heat exchanger plate closely to each other lie, in particular, the advantage that a leak from the outside for the Surveillance and operating personnel is visible when due to the leak between the Plate elements of the heat exchanger plate heat exchanger fluid only to a small extent which does not exit the heat exchanger fluid in the region of the outer Edges leads. As a result, when monitoring the plate heat exchanger already minor leaks visible from the outside.

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 may provide that outer edges adjacent Plate elements of two in the stack juxtaposed, double-walled Heat exchanger plates are each arranged closely adjacent to each other. In this way is the stack-like storage of several double-walled heat exchanger plates in predetermined Distance between each other easier.

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 expedient embodiment of the separate flow chambers for the at least two Heat exchange fluids provides a preferred embodiment of the invention that adjacent double-walled heat exchanger plates along adjacent raised Edge sections are connected to each other fluid-tight.

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 Plattenwärmeübertragers 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 Figure 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 heat exchanger plates arranged one behind the other 1, 2, 3, 4, each having through holes 5, 6, 7, 8. The Heat exchanger plates 1-4 are each as a double-walled heat exchanger plate with carried out two plate elements, at least in a central heat transfer section 9 come close to each other to ensure efficient heat transfer between to ensure at least two heat exchanger fluids, with the involvement of 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. It is about 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 point each in Figure 1 schematically indicated surface contours 10. The heat exchanger plates 1-4 are rotated in accordance with Figure 1 alternately by 180 ° in order to use the surface contours 10 heat exchanger plates arranged one behind the other 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.Figures 2a and 2b show a schematic representation of a plate heat exchanger 20 with several stacked, double-walled heat transfer plates of the kind as in Figure 1 are shown schematically, in a front and a side view. For insertion / removal the at least two heat exchanger fluids are inflow and outflow ports 21, 22 and 23, 24 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 section in the edge region of the plate heat transfer device 20 in Figure 2a along a line AA '. Of the several double-walled heat exchanger plates, which has the plate heat exchanger 20 are in Figure 3 by way of example the Heat transfer plates 30, 31, 32 are shown, each having two plate elements 33, 34. The two plate elements 33, 34 come in a central heat transfer section 35 close together to the plant, resulting in an area of a respective to the plane the central heat transfer section 35 raised edge portion 36 continues.

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 is a respective outer edge 33a, 34a formed, which in the illustrated embodiment to the outside is bent over. Adjacent outer edges 33a, 34a of adjacent heat transfer plates, For example, from the heat exchanger plates 30 and 31 or the heat exchanger plates 31 and 32 are arranged close to each other. In contrast, between outer edges 33a, 34a of the respective heat exchanger plate 30, 31 and 32, a gap 37 formed so that the outer edges 33a, 34a are spaced, preferably so, a capillary-breaking spacing is formed. In this way occurs heat exchanger fluid, which by a leak in one of the two plate elements of the heat exchanger plates 30, 31, 32 passes between the respective plate elements 33, 34, already in one area 38 between the two plate members 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 are adjacent heat exchanger plates 30 and 31 and 31 and 32 in the region of the respective raised edge portions 36 with the aid of Solder 39 soldered together. The soldering material 39 can in this case by capillary action reach into an end portion 40 between the outer edges 33a, 34a. It can, however also be provided that the outer edges 34a, 33a 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 described embodiment in the region of the outer edges 33a, 34a may be for all or only provided a part of the double-walled heat exchanger plates of a plate heat exchanger be.

Die in der vorstehenden Beschreibung, den Ansprüchen und der Zeichnung offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen von Bedeutung sein.Those disclosed in the foregoing description, claims and drawings Features of the invention can be used individually as well as in any combination for the Realization of the invention in its various embodiments of importance be.

Claims (3)

Plattenwärmeübertrager mit einem Stapel doppelwandiger Wärmeübertragerplatten (30-32), die dauerhaft miteinander verbunden sind und jeweils zwei Plattenelemente (33, 34) mit einem zentralen Wärmeübergangsabschnitt (35) und einem zur Ebene des zentralen Wärmeübergangsabschnitts (35) hochgestellten Randabschnitt (36) aufweisen, wobei zwischen den doppelwandigen Wärmeübertragerplatten (30-32) getrennte Durchflußräume für wenigstens zwei Wärmetauscher-Fluide gebildet sind, die beiden Plattenelemente (33, 34) im Bereich des zentralen Wärmeübergangsabschnitts (35) und des hochgestellten Randes (36) zumindest teilweise eng zur Anlage kommen, so daß jedoch Wärmetauscher-Fluid, was zwischen den beiden Plattenelementen (33, 34) zu den hochgestellten Randabschnitten (36) gelangt, durch eine Öffnung zwischen den hochgestellten Randabschnitten (36) austreten kann, und an dem jeweiligen hochgestellten Randabschnitt (36) ein äußerer Rand (33a, 34a) angeformt ist, dadurch gekennzeichnet, daß die äußeren Ränder (33a, 34a) der beiden Plattenelemente (33, 34) der doppelwandigen Wärmeübertragerplatten (30-32) jeweils beabstandet sind.Plate heat exchanger having a stack of double-walled heat exchanger plates (30-32) which are permanently connected to one another and each have two plate elements (33, 34) with a central heat transfer section (35) and an edge section (36) raised to the plane of the central heat transfer section (35), wherein between the double-walled heat exchanger plates (30-32) separate flow spaces for at least two heat exchanger fluids are formed, the two plate elements (33, 34) in the region of the central heat transfer section (35) and the raised edge (36) come at least partially close to the plant such that heat exchange fluid which passes between the two plate members (33, 34) to the raised edge portions (36) may exit through an opening between the raised edge portions (36) and at the respective raised edge portion (36) outer edge (33a, 34a) is formed, characterized gekennze in that the outer edges (33a, 34a) of the two plate elements (33, 34) of the double-walled heat exchanger plates (30-32) are each spaced apart. Plattenwärmeübertrager nach Anspruch 1, dadurch gekennzeichnet, daß äußere Ränder (33a, 34a) benachbarter Plattenelemente (33, 34) von zwei im Stapel benachbart angeordneten, doppelwandigen Wärmeübertragerplatten (30, 31; 31,32) eng aneinander anliegend angeordnet sind.Plate heat exchanger according to Claim 1, characterized in that outer edges (33a, 34a) of adjacent plate elements (33, 34) are arranged closely adjacent to one another by two double-walled heat exchanger plates (30, 31; Plattenwärmeübertrager nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß benachbarte doppelwandige Wärmeübertragerplatten (30, 31; 31,32) entlang benachbarter hochgestellter Randabschnitte (36) miteinander fluiddicht verbunden sind.Plate heat exchanger according to claim 1 or 2, characterized in that adjacent double-walled heat exchanger plates (30, 31; 31, 32) are connected to each other in a fluid-tight manner along adjacent elevated edge sections (36).
EP04008894A 2003-04-14 2004-04-14 Plate heat exchanger with double-walled heat exchanger plates Expired - Lifetime EP1469270B1 (en)

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DE10317263 2003-04-14

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

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