EP0211400A1 - Plate heat exchanger - Google Patents

Plate heat exchanger Download PDF

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Publication number
EP0211400A1
EP0211400A1 EP86110554A EP86110554A EP0211400A1 EP 0211400 A1 EP0211400 A1 EP 0211400A1 EP 86110554 A EP86110554 A EP 86110554A EP 86110554 A EP86110554 A EP 86110554A EP 0211400 A1 EP0211400 A1 EP 0211400A1
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EP
European Patent Office
Prior art keywords
plates
heat exchanger
exchanger body
plate heat
corrugated
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
EP86110554A
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German (de)
French (fr)
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EP0211400B1 (en
Inventor
Heinz Dr.-Ing. Gross
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Roehm GmbH Darmstadt
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Roehm GmbH Darmstadt
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Publication of EP0211400A1 publication Critical patent/EP0211400A1/en
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Publication of EP0211400B1 publication Critical patent/EP0211400B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/065—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing plate-like or laminated conduits
    • 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
    • F28D9/0037—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 conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/355—Heat exchange having separate flow passage for two distinct fluids
    • Y10S165/356—Plural plates forming a stack providing flow passages therein
    • Y10S165/393—Plural plates forming a stack providing flow passages therein including additional element between heat exchange plates
    • Y10S165/394—Corrugated heat exchange plate

Definitions

  • the invention relates in a broader sense to a plate heat exchanger, in the narrower sense to a plate heat exchanger body.
  • Plate heat exchangers consist of a stack of corrugated plates between which channels can flow. The area in which heat is exchanged between these channels is the actual heat exchanger body, while the complete heat exchanger also includes a system of supply and discharge lines to the individual channels for the flowing media.
  • the invention relates primarily to a new design of the plate heat exchanger body, which can be equipped in a conventional manner with supply and discharge lines for the flowing media.
  • Known plate heat exchangers (according to Ullmann, Encyclopedia of Technical Chemistry, 4th edition, volume 2, p. 440) consist of a bundle of any number of corrugated or otherwise profiled plates, which are separated from one another by seals and held together in a press. After opening the press, plates can be easily removed from separate and clean each other.
  • So-called lamella or stacked heat exchangers are composed of a stack of alternately flat and corrugated sheets, the direction of corrugation of the corrugated sheets alternating.
  • a collecting box and a feed or discharge line for the flowing media are attached to the four side surfaces of the stack.
  • the media between which heat is exchanged can only be routed crosswise to one another. The heat transfer takes place only on the flat sheets.
  • Plate or finned heat exchangers are inexpensive due to their simple construction and easy to maintain and clean due to their easy removal and installation.
  • the invention has for its object to improve the effectiveness of plate heat exchanger bodies, consisting of a stack of corrugated plates, between which flow-through channels exist, with a consistently simple structure.
  • the heat exchanger body according to the invention is composed of plates which are corrugated at least in partial areas in two mutually cross-lying directions. In the stack of successive plates are arranged in such a way that the corrugations in the cross-corrugated areas or partial areas are in phase in one direction and in phase opposition in the other direction.
  • the plates used for the construction of the heat exchanger body are easy to produce, since they are single-surface bodies without ribs or protrusions protruding from the surface, which can be easily produced by known methods by shaping a flat surface material.
  • a plurality of parallel channels which can be flowed through by a liquid or gaseous medium, automatically results between two plates.
  • These channels have a corrugated course, which strongly swirls the flowing medium.
  • a turbulent boundary layer is formed even at low flow velocities, which leads to an increase in the heat transfer coefficient.
  • the crosswise corrugation of the plate segments results in a considerable increase in the surface area available for heat exchange.
  • the heat exchange is further promoted in that all channel walls are touched by the other medium, so that there are practically no ineffective walls for heat exchange between the channels through which the same medium flows.
  • each individual plate Due to the biaxial corrugation, each individual plate has a high level of rigidity, which is increased considerably when assembled into a stack, since all individual plates are mutually supported at short intervals. Therefore, even when thin-walled material is used for the individual plates, a mechanically extremely stiff and stable heat exchanger body of low weight and high exchange capacity is obtained.
  • the heat exchanger according to the invention is suitable for heat exchange between liquid or gaseous media or between a liquid and a gaseous medium. It is particularly suitable for the creation of large heat exchange systems, especially in cooling towers, where a large number of heat exchanger bodies are combined to form a large cooling system.
  • the heat exchanger body can also serve as a chemical reactor at the same time if the channels are filled in one direction with a flowable catalyst mass or their walls are covered with a catalyst material.
  • the channels can also be filled with flowable absorption materials, so that the heat exchanger body also acts as a filter.
  • the simple production method of the heat exchanger body makes it possible to achieve any desired dimensioning and any desired adaptation to the temperatures occurring during operation and the chemical nature of the flowing media.
  • the surface shape of the biaxially corrugated plate arises from the fact that a wave curve E as generatrix is shifted in parallel on a wave-shaped guide curve F.
  • the roles of the leadership curve and the generators are interchangeable.
  • Each intersection that is parallel to the generatrix E through the biaxial corrugated surface has the profile of the generatrix E.
  • each intersection that is parallel to the guide curve F through the biaxially corrugated surface has the profile of the guide curve F.
  • domes 4 and troughs 5 result from the superimposition of the two wave trains, between which saddle surfaces lie, the highest and lowest points of which are at a height level that is the middle between the level of the domes 4 and the level the trough 5 forms.
  • the two corrugation axes E and F are generally at right angles to one another, but this is not a mandatory requirement for the construction of the heat exchanger body. It is also expedient, but not essential, that the wave trains E and F coincide in the wave form, the wavelength and the wave amplitude.
  • the waveform is chosen so that two in-phase waves can be joined as closely as possible.
  • Sine waves, trapezoidal waves and intermediate wave types are suitable, the individual waves of which can be composed of curved and bent straight-line pieces.
  • a trapezoidal curve was used as the basis for the wave curves E and F in FIGS.
  • the channels form automatically when the biaxially corrugated plates are stacked in the manner according to the invention. Therefore, the outer boundary of the individual plates is basically arbitrary. However, in order to be able to easily attach the feed and discharge line, it is expedient that all plates have the same base area so that they form a common side surface in the stack. A rectangular base is useful.
  • the wavelength and the wave amplitude depend both on the intended use of the heat exchanger body and on the method of manufacture of the plates.
  • the ratio of wave amplitude to wavelength is preferably in the range from 1:10 to 1: 1. A high ratio within this range promotes a strong swirling of the flowing medium and thus good heat transfer, but leads to a high flow resistance. With a decreasing ratio of amplitude to wavelength, the flow resistance initially decreases, but then increases again due to the narrowing of the channel cross section.
  • the wavelength is preferably in the range of 10 to 500 mm, the wave amplitude accordingly in the range from 1 to 150 mm.
  • the number of shafts in the longitudinal and transverse directions can be freely selected according to the technical requirements.
  • the lengths of the side edges of a rectangular base area are preferably 0.1 to 3 m and the number of waves on each side is approximately 10 to 400.
  • a variety of materials are suitable for the production of the biaxially corrugated plates.
  • metals ceramic materials such as clay, porcelain or glass, plastic, such as thermoplastics, thermosets, fiber-reinforced plastics or plastic-filled fabrics or nonwovens.
  • plastic such as thermoplastics, thermosets, fiber-reinforced plastics or plastic-filled fabrics or nonwovens.
  • Flat, flat starting materials that can be formed into the biaxially corrugated shape are particularly advantageous. This includes sheets of steel, aluminum, copper and other metals or alloys, as well as all thermoplastic or thermo-elastic plastic sheets. Suitable plastic panels of this type exist for. B.
  • Fiber-filled plastics such as so-called prepregs, which generally consist of a glass fiber fleece and a thermosetting epoxy resin, are also very suitable.
  • the sheet-like starting materials are brought into the desired biaxially corrugated shape under forming conditions between two suitable corresponding tools.
  • the circum ting plastics in the thermoelastic state it is not necessary to use fully developed molds. It is sufficient if the outermost maxima 4 and minima 5 are formed by suitable stamps.
  • the intermediate waveforms are automatically formed in the required manner under the influence of the elastic counterforces that arise during the deformation.
  • Plastic sheets with a thickness of 0.01 to 3 mm can be used for this deformation.
  • Metal sheets can also be unshaped in a corresponding manner.
  • a heat exchanger body with alternating layers of parallel channels for each of the two media is formed from three or more stacked biaxially corrugated plates. Each additional plate adds another layer of parallel flow channels.
  • the plates are stacked in such a way that the corrugations of two successive plates run in phase in the direction of one shaft axis and in phase opposition in the direction of the other shaft axis. Plates which have a uniform cross-corrugation throughout can be put together to form a cross-flow recuperator, with the directions of the in-phase and the antiphase course changing with each plate.
  • there are four different positions of the individual plates which are designated in Figure 3 with 1 to IV.
  • the position of the fifth plate matches the position of the first.
  • a cross-flow recuperator with side edges lying in one plane can be constructed from the desired number of completely identical individual plates. These are each offset by a quarter turn. This design is particularly advantageous because you can produce biaxially corrugated plates with a single pair of forming tools without waste, which can be brought into each of the four positions I to IV by quarter turns.
  • the cross-flow recuperator has the advantage that the supply lines 7, 8 and the discharge lines 9, 10 for two media flowing through can be connected to the heat exchanger body 15 in a particularly simple manner by placing a collecting box 11, 12, 13, 14 on each of its four side surfaces , of which two opposite boxes 11, 12 and 13, 14 each carry one of the two media.
  • Counterflow heat exchangers have a higher heat exchange line, in which all channels run in parallel in all layers.
  • This structure can be achieved in a simple manner according to the invention in that the surface elements are always stacked in phase in the same direction. In this case, however, the ends of the channels for both media lie alternately in layers on two opposite sides of the plate stack and have to be layered alternately connected to the respective supply lines.
  • This disadvantage can be avoided if the plates only in a central area 16, the z. B. occupies three quarters of the total area, have a crosswise corrugation.
  • the outer regions 17 adjoining on both sides can be undulating.
  • the plates are stacked in such a way that the channels are parallel to one another in all layers and lead from one outer region 17 to the opposite outer region.
  • the edge of the plates expediently forms a step 2 upwards in the one direction of the edge and a step 3 downwards in the other direction of the edge.
  • Successive plates in the stack are each opposed, which forms an inlet funnel 19 and 20 in each layer.
  • the funnel 19, which extends to the corners, is laterally closed at each corner of the stack of plates with an elastic sealing block 21.
  • 5 collection boxes 11, 12, 13, 14 are connected to the sides of the heat exchanger body 15 and the lines 7 and 9 as inlet and outlet for the one medium and the lines 8 and 10 as inlet and outlet for the other medium is used, a counter flow heat exchanger is obtained.
  • the inlet funnel 20 must be closed by a sealing profile 22 so that there is only access to the one outer area 17 from the connected collecting box 13, while there is only access to the other outer area from the other collecting box 14.
  • Fig. 4 shows an embodiment in which the plates 24 also are corrugated in the outer regions 17, whereby a larger surface area, a higher turbulence and a better heat transfer are also achieved in this region.
  • Every second plate 23 in the stack is evenly biaxially corrugated except for the edge regions 2, 3.
  • the corrugation in the superimposed plates runs in phase in both directions, so that no channels are formed, but the entire outer area can be freely flowed through at any point at the same distance.
  • the number of biaxially corrugated plates that are combined to form a heat exchanger body is basically arbitrary. In individual cases, it depends on the required heat exchange performance and the most appropriate design. Typical heat exchanger bodies have 3 to 100 individual surfaces.
  • the individual plates in the edge regions 2, 3 are connected to one another in a sealing manner. This can be done, for example, by an attached U-profile 28, which is placed over two outer edges.
  • FIG. 11 Another possibility for connecting a collecting tank 11 is shown in FIG. It can be placed over the side surfaces of the plate stack and in a suitable manner, for. B. by gluing, tightly attached.
  • the collecting box is preferably detachably fastened and the connection of the plates is also detachable.
  • the collecting box can - at least where it rests against the stack of plates elastic material and be attached with a drawstring 25.
  • the inlet funnels 19 can be stiffened by an inserted U-profile 26 with a passage opening 27 in order to be able to press the edges 2 tightly against one another. A tight seal between two superimposed edges 2 can also be achieved by means of an attached U-profile 28.

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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)

Abstract

Plattenwärmetauscher, insbesondere aus Kunststoff, bestehen aus einem Stapel Platten, die in zwei kreuzweise zueinanderliegenden Richtungen gewellt sind. Die Platten sind dem Stapel so angeordnet, daß die Wellungen aufeinanderfolgender Platten in der einen Richtung gleichphasig und in der anderen Richtung gegenphasig verlaufen. In Richtung der gleichphasigen Wellung bestehen durchströmbare Kanäle.Plate heat exchangers, in particular made of plastic, consist of a stack of plates which are corrugated in two mutually cross directions. The plates are arranged in the stack so that the corrugations of successive plates are in phase in one direction and in phase opposition in the other direction. Flowable channels exist in the direction of the in-phase corrugation.

Description

Gebiet der ErfindungField of the Invention

Die Erfindung betrifft im weiteren Sinne einen Plattenwärmetauscher, im engeren Sinne einen Plattenwärmetaucherkörper. Plattenwärmetauscher bestehen aus einem Stapel gewellter Platten zwischen denen durchströmbare Kanäle bestehen. Der Bereich, in welchem zwischen diesen Kanälen Wärme ausgetauscht wird, ist der eigentliche Wärmetauscherkörper, während zu dem vollständigen Wärmetauscher auch ein System von Zu- und Abführungsleitungen zu den einzelnen Kanälen für die strömenden Medien gehören. Die Erfindung betrifft in erster Linie eine neue Gestaltung des Plattenwärmetauscherkörpers, der in herkömmlicher Weise mit Zu- und Abführungsleitungen für die strömenden Medien ausgerüstet werden kann.The invention relates in a broader sense to a plate heat exchanger, in the narrower sense to a plate heat exchanger body. Plate heat exchangers consist of a stack of corrugated plates between which channels can flow. The area in which heat is exchanged between these channels is the actual heat exchanger body, while the complete heat exchanger also includes a system of supply and discharge lines to the individual channels for the flowing media. The invention relates primarily to a new design of the plate heat exchanger body, which can be equipped in a conventional manner with supply and discharge lines for the flowing media.

Stand der TechnikState of the art

Bekannte Plattenwärmetauscher bestehen (nach Ullmann, Enzyklopädie der technischen Chemie, 4. Auflage, Band 2, S. 440) aus einem Bündel aus beliebig vielen gewellten oder anderweitig profilierten Platten, die, durch Dichtungen voneinander getrennt, in einer Presse zusammengehalten werden. Nach Öffnen der Presse lassen sich Platten leicht voneinander trennen und reinigen.Known plate heat exchangers (according to Ullmann, Encyclopedia of Technical Chemistry, 4th edition, volume 2, p. 440) consist of a bundle of any number of corrugated or otherwise profiled plates, which are separated from one another by seals and held together in a press. After opening the press, plates can be easily removed from separate and clean each other.

Sogenannte Lamellen- oder Stapelwärmetauscher sind (nach Ullmann, loc. cit., S.441) aus einem Stapel von abwechselnd flachen und gewellten Blechen zusammengesetzt, wobei die Wellungsrichtung der gewellten Bleche abwechselt. An den vier Seitenflächen des Stapels ist jeweils ein Sammelkasten und eine Zu- bzw. Abführungsleitung für die strömenden Medien angebracht. Die Medien, zwischen denen Wärme ausgetauscht wird, können nur kreuzweise zueinander geführt werden. Der Wärmeübergang findet nur an den flachen Blechen statt.So-called lamella or stacked heat exchangers (according to Ullmann, loc. Cit., P.441) are composed of a stack of alternately flat and corrugated sheets, the direction of corrugation of the corrugated sheets alternating. A collecting box and a feed or discharge line for the flowing media are attached to the four side surfaces of the stack. The media between which heat is exchanged can only be routed crosswise to one another. The heat transfer takes place only on the flat sheets.

Platten- oder Lamellenwärmetauscher sind wegen ihres einfachen Aufbaus billig und durch leichten Ab- und Aufbau bequem zu warten und zu reinigen.Plate or finned heat exchangers are inexpensive due to their simple construction and easy to maintain and clean due to their easy removal and installation.

Aufgabe und LösungTask and solution

Der Erfindung liegt die Aufgabe zugrunde, die Wirksamkeit von Plattenwärmetauscherkörpern, bestehend aus einem Stapel von gewellten Platten, zwischen denen durchströmbare Kanäle bestehen, bei gleichbleibend einfachem Aufbau zu verbessern.The invention has for its object to improve the effectiveness of plate heat exchanger bodies, consisting of a stack of corrugated plates, between which flow-through channels exist, with a consistently simple structure.

Der erfindungsgemäße Wärmetauscherkörper ist aus Platten zusammengesetzt, die wenigstens in Teilbereichen in zwei kreuzweise zueinanderliegenden Richtungen gewellt sind. In dem Stapel aufeinanderfolgende Platten sind so angeordnet, daß die Wellungen in den kreuzweise gewellten Bereichen oder Teilbereichen in der einen Richtung gleichphasig und in der anderen Richtung gegenphasig verlaufen.The heat exchanger body according to the invention is composed of plates which are corrugated at least in partial areas in two mutually cross-lying directions. In the stack of successive plates are arranged in such a way that the corrugations in the cross-corrugated areas or partial areas are in phase in one direction and in phase opposition in the other direction.

Die zum Aufbau des Wärmetauscherkörpers verwendeten Platten sind leicht herstellbar, da es sich um einflächige Körper ohne von der Fläche abstehende Rippen oder Vorsprünge handelt, die nach bekannten Verfahren durch Unformung eines ebenen Flächenmaterials leicht herstellbar sind. Beim Stapeln in der erfindungsgemäßen Weise ergibt sich zwischen je zwei Platten von selbst eine Vielzahl von parallelen Kanälen, die durch ein flüssiges oder gasförmiges Medium durchströmbar sind. Diese Kanäle haben einen gewellten Verlauf, wodurch das strömende Medium stark verwirbelt wird. Dadurch bildet sich bereits bei geringen Strömungsgeschwindigkeiten eine turbulente Grenzschicht aus, die zu einem Anstieg des Wärmeübergangskoeffizienten führt. Weiterhin ergibt sich durch die kreuzweise Wellung der Plattensegmente eine erhebliche Vergrößerung der zum Wärmeaustausch zur Verfügung stehenden Oberfläche. Der Wärmeaustausch wird weiterhin dadurch gefördert, daß alle Kanalwände von dem jeweils anderen Medium berührt werden, so daß praktisch keine für den Wärmetausch unwirksamen Wände zwischen den vom gleichen Medium durchströmten Kanälen bestehen.The plates used for the construction of the heat exchanger body are easy to produce, since they are single-surface bodies without ribs or protrusions protruding from the surface, which can be easily produced by known methods by shaping a flat surface material. When stacking in the manner according to the invention, a plurality of parallel channels, which can be flowed through by a liquid or gaseous medium, automatically results between two plates. These channels have a corrugated course, which strongly swirls the flowing medium. As a result, a turbulent boundary layer is formed even at low flow velocities, which leads to an increase in the heat transfer coefficient. Furthermore, the crosswise corrugation of the plate segments results in a considerable increase in the surface area available for heat exchange. The heat exchange is further promoted in that all channel walls are touched by the other medium, so that there are practically no ineffective walls for heat exchange between the channels through which the same medium flows.

Durch die zweiachsige Wellung besitzt jede einzelne Platte eine hohe Steifigkeit, die beim Zusammenfügen zu einem Stapel noch erheblich verstärkt wird, da sich alle Einzelplatten in geringen Abständen gegenseitig abstützen. Man erhält daher auch dann, wenn dünnwandiges Material für die einzelnen Platten verwendet wird, einen mechanisch außerordentlich steifen und stabilen Wärmetauscherkörper von geringem Gewicht und hoher Austauschkapazität.Due to the biaxial corrugation, each individual plate has a high level of rigidity, which is increased considerably when assembled into a stack, since all individual plates are mutually supported at short intervals. Therefore, even when thin-walled material is used for the individual plates, a mechanically extremely stiff and stable heat exchanger body of low weight and high exchange capacity is obtained.

Anwendungapplication

Der erfindungsgemäße Wärmetauscher eignet sich zum Wärmeaustausch zwischen flüssigen oder gasförmigen Medien oder zwischen einem flüssigen und einem gasförmigen Medium. Er eignet sich in besonderem Maße für die Erstellung von großen Wärmetauschanlagen, insbesondere in Kühltürmen, wo eine Vielzahl von Wärmetauscherkörpern zu einem großen Kühlsystem zusammengestellt sind.The heat exchanger according to the invention is suitable for heat exchange between liquid or gaseous media or between a liquid and a gaseous medium. It is particularly suitable for the creation of large heat exchange systems, especially in cooling towers, where a large number of heat exchanger bodies are combined to form a large cooling system.

Der Warmetauscherkörper kann auch gleichzeitig als chemischer Reaktor dienen, wenn die Kanäle in einer Richtung mit einer durchströmbaren Katalysatormasse gefüllt oder ihre Wände mit einem Katalysatormaterial belegt sind. Auch können die Kanäle mit durchströmbaren Absorptionsmaterialien gefüllt sein, so daß der Wärmetauscherkörper gleichzeitig als Filter wirkt.The heat exchanger body can also serve as a chemical reactor at the same time if the channels are filled in one direction with a flowable catalyst mass or their walls are covered with a catalyst material. The channels can also be filled with flowable absorption materials, so that the heat exchanger body also acts as a filter.

Die einfache Herstellungsweise des Wärmetauscherkörpers macht es möglich, jede gewünschte Dimensionierung und jede gewünschte Anpassung an die im Betrieb auftretenden Temperaturen und die chemische Beschaffenheit der strömenden Medien zu erreichen.The simple production method of the heat exchanger body makes it possible to achieve any desired dimensioning and any desired adaptation to the temperatures occurring during operation and the chemical nature of the flowing media.

Figurencharacters

Die Erfindung wird nachfolgend anhand der Figuren 1 bis 6 näher erläutert.

  • Figur 1 zeigt in perspektivischer Sicht eine für den Aufbau des Rekuperator-Körpers geeignete zweiachsig gewellte Platte, bzw. einen Ausschnitt aus einer solchen Platte.
  • Figur 2 zeigt Ausschnitte aus vier übereinanderliegenden Platten eines erfindungsgemäßen Kreuzstromwärmetauscherkörpers in perspektivischer Explosionsdarstellung.
  • Figur 3 stellt die Anordnungsweise der einzelnen Platten eines Kreuzstranwärmetauschers in schematisierter Weise dar, wobei die strichpunktierte Linie eine Ecke des Wärmetauscherkörpers darstellt. Rechts und links davon ist in dick ausgezogenen Linien der Wellenverlauf der Einzelplatten in den an die Ecke anschließenden Seitenflächen dargestellt. Die dünnen Linien zeigen die Projektion der einzelnen zweiachsig gewellten Platten auf die Seitenfläche des Wärmetauscherkörpers.
  • Figur 3a zeigt die Anordnung in Explosionsdarstellung, Figur 3b in Betriebsanordnung.
  • Figur 4 zeigt eine zweckmäßige Ausgestaltung des ungewellten Randes einer Platte, sowie eine Ausgestaltung zur Erstellung von Gleich- oder Gegenstranwännetauschern. Dabei zeigt Figur 4a eine Platte in Aufsicht, worin ausgefüllte Quadrate die Tiefstpunkte und leere Quadrate die Höchstpunkte darstellen. Figur 4b zeigt Schnittlinien durch stapelbar übereinander angeordnete Platten, wobei die dick ausgezogenen Linien dem Schnitt CD und die punktierten Linien dem Schnitt EF in Figur 4a entsprechen.
  • Figur 5 zeigt in Aufsicht einen Wärmetauscherkörper mit angesetzten Sammelkästen und Anschlußleitungen.
  • Figur 6 zeigt einen Querschnitt durch den Rand eines Wärmetauschers längs der Linie AB in Figur 4a mit angeschlossenem Sammelkasten und Anschlußleitung.
The invention is explained in more detail below with reference to FIGS. 1 to 6.
  • FIG. 1 shows a perspective view of a biaxially corrugated plate suitable for the construction of the recuperator body, or a section of such a plate.
  • Figure 2 shows sections of four superimposed plates of a cross-flow heat exchanger body according to the invention in a perspective exploded view.
  • Figure 3 shows the arrangement of the individual plates of a cross-flow heat exchanger in a schematic manner, the dash-dotted line representing a corner of the heat exchanger body. To the right and left of this, the wavy course of the individual plates is shown in thick solid lines in the side surfaces adjoining the corner. The thin lines show the projection of the individual biaxially corrugated plates onto the side surface of the heat exchanger body.
  • Figure 3a shows the arrangement in an exploded view, Figure 3b in the operating arrangement.
  • FIG. 4 shows an expedient configuration of the non-corrugated edge of a plate, as well as an embodiment for the production of direct or counter current exchangers. Figure 4a shows a plate in supervision, in which filled squares represent the lowest points and empty squares the highest points. FIG. 4b shows cut lines through stackable plates arranged one above the other, the thick solid lines corresponding to the cut CD and the dotted lines corresponding to the cut EF in FIG. 4a.
  • Figure 5 shows a top view of a heat exchanger body with attached header boxes and connecting lines.
  • Figure 6 shows a cross section through the edge of a heat exchanger along the line AB in Figure 4a with a connected header box and connection line.

Die zweiachsig gewellte PlatteThe biaxial corrugated plate

Geometrisch entsteht die Flächengestalt der zweiachsig gewellten Platte dadurch, daß eine Wellenkurve E als Erzeugende an einer wellenförmigen Führungskurve F parallel verschoben wird. Die Rolle der Führungskurve und der Erzeugenden sind austauschbar. Jede Schnittfläche, die parallel zu der Erzeugenden E durch die zweiachsige gewellte Fläche gelegt wird, hat das Profil der Erzeugenden E. Ebenso hat jede Schnittfläche, die parallel zu der Führungskurve F durch die zweiachsig gewellte Fläche gelegt wird, das Profil der Führungskurve F. In der Praxis genügt es, wenn die ideale geometrische Gestalt näherungsweise in solchem Maße verwirklicht ist, daß eine Schichtung unter Bildung von durchströmbaren Kanälen möglich ist.Geometrically, the surface shape of the biaxially corrugated plate arises from the fact that a wave curve E as generatrix is shifted in parallel on a wave-shaped guide curve F. The roles of the leadership curve and the generators are interchangeable. Each intersection that is parallel to the generatrix E through the biaxial corrugated surface has the profile of the generatrix E. Likewise, each intersection that is parallel to the guide curve F through the biaxially corrugated surface has the profile of the guide curve F. In in practice, it is sufficient if the ideal geometric shape is realized to such an extent that stratification is possible with the formation of flowable channels.

An den Kreuzungspunkten der Wellenmaxima und -minima ergeben sich durch Überlagerung der beiden Wellenzüge Kuppeln 4 und Mulden 5, zwischen denen Sattelflächen liegen, deren höchste bzw. tiefste Punkte auf einem Höhenniveau liegen, das die Mitte zwischen dem Niveau der Kuppeln 4 und.dem Niveau der Mulden 5 bildet.At the crossing points of the wave maxima and minima, domes 4 and troughs 5 result from the superimposition of the two wave trains, between which saddle surfaces lie, the highest and lowest points of which are at a height level that is the middle between the level of the domes 4 and the level the trough 5 forms.

Die beiden Wellungsachsen E und F stehen in der Regel im rechten Winkel zueinander, jedoch ist dies keine zwingende Voraussetzung für den Aufbau des Wärmetauscher-Körpers. Ebenso ist es zweckmäßig, aber nicht unerläßlich, daß die Wellenzüge E und F in der Wellenform, der Wellenlänge und der Wellenamplitude übereinstimmen.The two corrugation axes E and F are generally at right angles to one another, but this is not a mandatory requirement for the construction of the heat exchanger body. It is also expedient, but not essential, that the wave trains E and F coincide in the wave form, the wavelength and the wave amplitude.

Die Wellenform wird so gewählt, daß sich zwei gleichphasige Wellen möglichst dicht aneinander fügen lassen. Geeignet sind Sinuswellen, Trapezwellen und dazwischenliegende Wellentypen, deren einzelne Wellen aus gebogenen und geknickten geradlinigen Stücken zusammengesetzt sein können. In den Figuren 1 bis 6 wurde für die Wellenkurven E und F eine Trapezkurve zugrunde gelegt.The waveform is chosen so that two in-phase waves can be joined as closely as possible. Sine waves, trapezoidal waves and intermediate wave types are suitable, the individual waves of which can be composed of curved and bent straight-line pieces. A trapezoidal curve was used as the basis for the wave curves E and F in FIGS.

Die Kanäle bilden sich von selbst, wenn die zweiachsig gewellten Platten in der erfindungsgemäßen Weise übereinandergeschichtet werden. Daher ist die äußere Begrenzung der einzelnen Platten grundsätzlich beliebig. Um jedoch die Zu-und Abführungsleitung leicht anbringen zu können, ist es zweckmäßig, daß alle Platten die gleiche Grundfläche haben, so daß sie im Stapel eine gemeinsame Seitenfläche bilden. Eine rechteckige Grundfläche ist zweckmäßig.The channels form automatically when the biaxially corrugated plates are stacked in the manner according to the invention. Therefore, the outer boundary of the individual plates is basically arbitrary. However, in order to be able to easily attach the feed and discharge line, it is expedient that all plates have the same base area so that they form a common side surface in the stack. A rectangular base is useful.

Die Wellenlänge und die Wellenamplitude richten sich sowohl nach dem Verwendungszweck des Wärmetauscher-Körpers als auch nach der Herstellungsweise der Platten. Das Verhältnis von Wellenamplitude zu Wellenlänge liegt vorzugsweise im Breich von 1 : 10 bis 1 : 1. Ein hohes Verhältnis innerhalb dieses Bereiches fördert eine starke Verwirbelung des strömenden Mediums und damit einen guten Wärmeübergang, führt aber zu einem hohen Strömtungswiderstand. Bei abnehmendem Verhältnis von Amplitude zu Wellenlänge nimmt der Strömungswiderstand zunächst ab, dann aber wegen zunehmender Verengung des Kanalquerschnittes wieder zu. Die Wellenlänge liegt vorzugsweise im Bereich von 10 bis 500 mm, die Wellenamplitude dementsprechend im Bereich von 1 bis 150 mm. Die Anzahl der Wellen in Längs- und Querrichtung kann nach den technischen Erfodernissen frei gewählt werden. Vorzugsweise betragen die Längen der Seitenkante einer rechteckigen Grundfläche 0,1 bis 3 m und die Anzahl der Wellen je Seite etwa 10 bis 400.The wavelength and the wave amplitude depend both on the intended use of the heat exchanger body and on the method of manufacture of the plates. The ratio of wave amplitude to wavelength is preferably in the range from 1:10 to 1: 1. A high ratio within this range promotes a strong swirling of the flowing medium and thus good heat transfer, but leads to a high flow resistance. With a decreasing ratio of amplitude to wavelength, the flow resistance initially decreases, but then increases again due to the narrowing of the channel cross section. The wavelength is preferably in the range of 10 to 500 mm, the wave amplitude accordingly in the range from 1 to 150 mm. The number of shafts in the longitudinal and transverse directions can be freely selected according to the technical requirements. The lengths of the side edges of a rectangular base area are preferably 0.1 to 3 m and the number of waves on each side is approximately 10 to 400.

Für die Herstellung der zweiachsig gewellten Platten eignet sich eine Vielzahl von Werkstoffen. Verwendbar sind z. B. Metalle, keramische Werkstoffe, wie Ton, Porzellan oder Glas, Kunststoff, wie Thermoplaste, Duroplaste, faserverstärkte Kunststoffe oder kunststoffgefüllte Gewebe oder Vliese. Besonders vorteilhaft sind ebene, flächige Ausgangswerkstoffe, die sich zu der zweiachsig gewellten Gestalt umformen lassen. Hierzug gehören Bleche aus Stahl, Aluminium, Kupfer und anderen Metallen oder Legierungen, sowie alle thermoplastisch bzw.thermoelastisch umformbare Kunststofftafeln. Geeignete Kunststoff tafeln dieser Art bestehen z. B. aus Acrylglas (Polymethylmethacrylat und Methylmethacrylat-Copolymerisate), Polyvinylchlorid, Polyolefinen, wie Polyäthylen oder Polypropylen, Polycarbonaten, wie Bisphenol-A-Polycarbonat, Polysulfonen, Polyimiden, Polyestern. Gut geeignet sind auch fasergefüllte Kunststoffe, wie sogenannte Prepregs, die in der Regel aus einem Glasfaservlies und einem wärmehärtbaren Epoxidharz bestehen.A variety of materials are suitable for the production of the biaxially corrugated plates. Are z. B. metals, ceramic materials such as clay, porcelain or glass, plastic, such as thermoplastics, thermosets, fiber-reinforced plastics or plastic-filled fabrics or nonwovens. Flat, flat starting materials that can be formed into the biaxially corrugated shape are particularly advantageous. This includes sheets of steel, aluminum, copper and other metals or alloys, as well as all thermoplastic or thermo-elastic plastic sheets. Suitable plastic panels of this type exist for. B. from acrylic glass (polymethyl methacrylate and methyl methacrylate copolymers), polyvinyl chloride, polyolefins, such as polyethylene or polypropylene, polycarbonates, such as bisphenol-A polycarbonate, polysulfones, polyimides, polyesters. Fiber-filled plastics, such as so-called prepregs, which generally consist of a glass fiber fleece and a thermosetting epoxy resin, are also very suitable.

Die tafelförmigen Ausgangsmaterialien werden zur Herstellung zweiachsig gewellter Platten unter Umformungsbedingungen zwischen zwei geeigneten korrespondierenden Werkzeugen in die gewünschte zweiachsig gewellte Form gebracht. Bei der umf ormung von Kunststoffen im thermoelastischen Zustand ist es nicht erforderlich, vollflächig ausgearbeitete Formwerkzeuge zu verwenden. Es genügt, wenn die äußersten Maxima 4 und Minima 5 durch geeignete Formstempel ausgebildet werden. Die dazwischenliegenden Wellenformen bilden sich unter der Einwirkung der bei der Unformung entstehenden elastischen Gegenkräfte von selbst in der erforderlichen Weise aus. Für diese Unformung können Kunststoff tafeln einer Dicke von 0,01 bis 3 mm eingesetzt werden. In entsprechender Weise können auch Metallbleche ungeformt werden.To produce biaxially corrugated plates, the sheet-like starting materials are brought into the desired biaxially corrugated shape under forming conditions between two suitable corresponding tools. With the circum ting plastics in the thermoelastic state, it is not necessary to use fully developed molds. It is sufficient if the outermost maxima 4 and minima 5 are formed by suitable stamps. The intermediate waveforms are automatically formed in the required manner under the influence of the elastic counterforces that arise during the deformation. Plastic sheets with a thickness of 0.01 to 3 mm can be used for this deformation. Metal sheets can also be unshaped in a corresponding manner.

Der WärmetauscherkörperThe heat exchanger body

Ein Wärmetauscherkörper mit abwechselnden Lagen von parallelen Kanälen für jedes der beiden Medien wird aus drei oder mehr übereinander geschichteten zweiachsig gewellten Platten gebildet. Jede weitere Platte fügt eine weitere Lage von parallelen Strömungskanälen hinzu. Die Platten werden in der Weise gestapelt, daß die Wellungen von jeweils zwei aufeinanderfolgenden Platten in Richtung der einen Wellenachse gleichphasig und in Richtung der anderen Wellenachse gegenphasig verlaufen. Platten, die eine durchgehend gleichmäßige Kreuzwellung aufweisen, lassen sich zu einem Kreuzstrcmrekuperator zusammensetzen, wobei die Richtungen des gleichphasigen und des gegenphasigen Verlaufs mit jeder Platte wechseln. Wie Figur 3 zeigt, ergeben sich dabei vier verschiedene Stellungen der einzelnen Platten, die in Figur 3 mit 1 bis IV bezeichnet sind. Die Lage der fünften Platte stimmt wieder mit der Lage der ersten überein.A heat exchanger body with alternating layers of parallel channels for each of the two media is formed from three or more stacked biaxially corrugated plates. Each additional plate adds another layer of parallel flow channels. The plates are stacked in such a way that the corrugations of two successive plates run in phase in the direction of one shaft axis and in phase opposition in the direction of the other shaft axis. Plates which have a uniform cross-corrugation throughout can be put together to form a cross-flow recuperator, with the directions of the in-phase and the antiphase course changing with each plate. As shown in Figure 3, there are four different positions of the individual plates, which are designated in Figure 3 with 1 to IV. The position of the fifth plate matches the position of the first.

Wenn die Platten eine in die Grundfläche projizierte Länge der Seitenkante von einem ungeraden Vielfachen der halben Wellenlänge haben, kann ein Kreuzstrcmrekuperator mit in einer Ebene liegenden Seitenkanten aus der gewünschten Zahl von völlig gleich gestalteten Einzelplatten aufgebaut werden. Diese werden jeweils um eine Vierteldrehung gegeneinander versetzt angeordnet. Diese Bauweise ist besonders vorteilhaft, weil man mit einem einzigen paar von Umformwerkzeugen ohne Verschnitt zweiachsig gewellte Platten herstellen kann, die jeweils durch Vierteldrehungen in jede der vier Stellungen I bis IV gebracht werden können.If the plates have a length of the side edge projected into the base area of an odd multiple of half the wavelength, a cross-flow recuperator with side edges lying in one plane can be constructed from the desired number of completely identical individual plates. These are each offset by a quarter turn. This design is particularly advantageous because you can produce biaxially corrugated plates with a single pair of forming tools without waste, which can be brought into each of the four positions I to IV by quarter turns.

Der Kreuzstromrekuperator hat den Vorteil, daß die Zuleitungen 7,8 und die Ableitungen 9,10 für zwei durchströmende Medien besonders einfach an den Wärmetauscherkörper 15 angeschlossen werden können, indem auf jede seiner vier Seitenflächen je ein Sammelkasten 11, 12, 13, 14 aufgesetzt wird, von denen je zwei gegenüberliegende Kästen 11, 12 bzw. 13, 14 jeweils eines der beiden Medien führen.The cross-flow recuperator has the advantage that the supply lines 7, 8 and the discharge lines 9, 10 for two media flowing through can be connected to the heat exchanger body 15 in a particularly simple manner by placing a collecting box 11, 12, 13, 14 on each of its four side surfaces , of which two opposite boxes 11, 12 and 13, 14 each carry one of the two media.

Eine höhere Wärmeaustauschleitung haben Gegenstromwärmetauscher, bei denen alle Kanäle in allen Schichten parallel verlaufen. Dieser Aufbau läßt sich erfindungsgemäß auf einfache Weise dadurch verwirklichen, daß man die Flächenelemente stets in der gleichen Richtung phasengleich stapelt. In diesem Falle liegen allerdings die Enden der Kanäle für beide Medien schichtweise abwechselnd an zwei gegenüberliegenden Seiten des Plattenstapels und müssen schichtweise wechselnd an die jeweiligen Versorgungsleitungen angeschlossen werden. Dieser Nachteil läßt sich vermeiden, wenn die Platten nur in einem mittleren Bereich 16, der z. B. drei Viertel der Gesamtfläche einnimmt, eine kreuzweise Wellung aufweisen. Die beiderseits daran anschließenden äußeren Bereiche 17 können ungewellt sein. Die Platten werden so gestapelt, daß die Kanäle in allen Schichten parallel zueinander liegen und von dem einen äußeren Bereich 17 in den gegenüberliegenden äußeren Bereich führen.Counterflow heat exchangers have a higher heat exchange line, in which all channels run in parallel in all layers. This structure can be achieved in a simple manner according to the invention in that the surface elements are always stacked in phase in the same direction. In this case, however, the ends of the channels for both media lie alternately in layers on two opposite sides of the plate stack and have to be layered alternately connected to the respective supply lines. This disadvantage can be avoided if the plates only in a central area 16, the z. B. occupies three quarters of the total area, have a crosswise corrugation. The outer regions 17 adjoining on both sides can be undulating. The plates are stacked in such a way that the channels are parallel to one another in all layers and lead from one outer region 17 to the opposite outer region.

Der Rand der Platten bildet zweckmäßigerweise gegenüber der Mittelebene 18 in der einen Richtung des Randes eine Stufe 2 nach oben und in der anderen Richtung des Randes eine Stufe 3 nach unten. Aufeinanderfolgende Platten im Stapel sind jeweils entgegengesetzt gestuft, wodurch sich in jeder Schicht ein Eintrittstrichter 19 bzw. 20 bildet. Der bis zu den Ecken durchgehende Trichter 19 wird an jeder Ecke des Plattenstapels mit einem elastischen Dichtungsblock 21 seitlich verschlossen. Werden entsprechend Fig. 5 Sammelkästen 11, 12, 13, 14 an die Seiten des Wärmetauscherkörpers 15 angeschlossen und die Leitungen 7 und 9 als Zu- bzw. Ablauf für das eine Medium und die Leitungen 8 und 10 als Zu- bzw. Ablauf für das andere Medium benutzt, so erhält man einen Gegenstrcmwärmetauscher. In diesem Falle muß der Eintrittstrichter 20 durch ein Dichtungsprofil 22 so verschlossen werden, daß von dem angeschlossenen Sammelkasten 13 nur zu dem einen äußeren Bereich 17 Zugang besteht, während von dem anderen Sammelkasten 14 nur Zugang zu dem anderen äußeren Bereich besteht.The edge of the plates expediently forms a step 2 upwards in the one direction of the edge and a step 3 downwards in the other direction of the edge. Successive plates in the stack are each opposed, which forms an inlet funnel 19 and 20 in each layer. The funnel 19, which extends to the corners, is laterally closed at each corner of the stack of plates with an elastic sealing block 21. 5 collection boxes 11, 12, 13, 14 are connected to the sides of the heat exchanger body 15 and the lines 7 and 9 as inlet and outlet for the one medium and the lines 8 and 10 as inlet and outlet for the other medium is used, a counter flow heat exchanger is obtained. In this case, the inlet funnel 20 must be closed by a sealing profile 22 so that there is only access to the one outer area 17 from the connected collecting box 13, while there is only access to the other outer area from the other collecting box 14.

Fig. 4 zeigt eine Ausführungsform, bei der die Platten 24 auch in den äußeren Bereichen 17 gewellt sind, wodurch auch in diesem Bereich eine größere Oberfläche, eine höhere Turbulenz und ein besserer Wärmeübergang erzielt werden. Jede zweite Platte 23 in dem Stapel ist bis auf die Randbereiche 2, 3 gleichmäßig zweiachsig gewellt. Zwischen zwei Platten 23 liegt jeweils eine Platte 24, bei der die Wellung in den äußeren Bereichen 17 um eine halbe Wellenlänge versetzt ist. Dadurch verläuft die Wellung in den übereinanderliegenden Platten in beiden Richtungen phasengleich, so daß sich keine Kanäle bilden sondern der ganze äußere Bereich bei gleichem Abstand an jeder Stelle frei durchströmbar ist.Fig. 4 shows an embodiment in which the plates 24 also are corrugated in the outer regions 17, whereby a larger surface area, a higher turbulence and a better heat transfer are also achieved in this region. Every second plate 23 in the stack is evenly biaxially corrugated except for the edge regions 2, 3. Between each plate 23 there is a plate 24, in which the corrugation in the outer regions 17 is offset by half a wavelength. As a result, the corrugation in the superimposed plates runs in phase in both directions, so that no channels are formed, but the entire outer area can be freely flowed through at any point at the same distance.

Die Anzahl der zweiachsig gewellten Platten, die zu einem Wärmetauscherkörper vereinigt werden, ist grundsätzlich beliebig. Sie richtet sich im Einzelfall nach der erforderlichen Wärmetauschleistung und der jeweils zweckmäßigsten Gestaltung. Typische Wärmetauscherkörper haben 3 bis 100 Einzelflächen.The number of biaxially corrugated plates that are combined to form a heat exchanger body is basically arbitrary. In individual cases, it depends on the required heat exchange performance and the most appropriate design. Typical heat exchanger bodies have 3 to 100 individual surfaces.

Beim bloßen Aufeinanderstapeln einzelner Platten zu einem Wärmetauscherkörper ist der seitliche Abschluß der Kanäle an den Seitenkanten nicht völlig dicht. Trotzdem kann ein solcher Stapel in vielen Fällen als Wärmetauscher verwendet werden, wenn eine geringfügige Durchmischung der beiden Medien durch Leckströmung an den Seitenkanten hingenommen werden kann. Dies kann beispielsweise für den Wärmeaustausch zwischen Kühlwasserströmen oder zwischen der Zu- und Abluft von Gebäuden der Fall sein. In diesen Fällen genügt es, wenn der Wärmetauscherkörper durch geeignete Spannmittel mechanisch zusammengehalten wird.When stacking individual plates together to form a heat exchanger body, the side closure of the channels on the side edges is not completely sealed. Nevertheless, such a stack can be used in many cases as a heat exchanger if a slight mixing of the two media can be tolerated by leakage flow on the side edges. This can be the case, for example, for heat exchange between cooling water flows or between the supply and exhaust air of buildings. In these cases it is sufficient if the heat exchanger body is held together mechanically by suitable clamping means.

Wenn dagegen eine Durchmischung der strömenden Medien ausgeschlossen werden muß, werden die einzelnen Platten in den Randbereichen 2, 3 dichtend miteinander verbunden. Dies kann beispielsweise durch ein aufgesetztes U-Profil 28, welches über jeweils zwei Außenkanten gelegt ist, geschehen.If, on the other hand, mixing of the flowing media has to be excluded, the individual plates in the edge regions 2, 3 are connected to one another in a sealing manner. This can be done, for example, by an attached U-profile 28, which is placed over two outer edges.

Man kann an die Seitenflächen eines Wärmetauscherkörpers 15 Sammelkästen 11, 12, 13, 14 mit einer weichelastischen, dichtenden Beschichtung anpressen. Vorteilhafter ist es, die gleichphasig verlaufenden Ränder benachbarter Platten umzufalzen, miteinander zu verkleben oder zu verschweißen. Geeignete Klebenassen können beim Aufeinanderstapeln jeweils zwischengefügt werden. Sofern die Platten aus einem thermoplastischen Kunststoff bestehen, kann zum gleichzeitigen Verschweißen aller an einer Seitenfläche liegenden gleichphasigen Berührungslinien ein beheizbares Werkzeug verwendet werden, in welches Nuten entsprechend den an den Seiten des Wärmetauscherkörpers liegenden Außenkanten der einzelnen Platten eingeschnitten sind. Beim Einsenken der Seitenfläche in diese Nuten wird der Werkstoff aufgeschmolzen und verschweißt.One can press 15 collecting boxes 11, 12, 13, 14 with a soft-elastic, sealing coating onto the side surfaces of a heat exchanger body. It is more advantageous to fold the edges of adjacent plates running in phase, to glue them to one another or to weld them. Suitable adhesives can be interposed when stacked on top of each other. If the plates are made of a thermoplastic plastic, a heatable tool can be used for the simultaneous welding of all in-phase contact lines lying on one side surface, into which grooves are cut in accordance with the outer edges of the individual plates lying on the sides of the heat exchanger body. When the side surface is countersunk in these grooves, the material is melted and welded.

Eine weitere Möglichkeit zum Anschluß eines Sammelkastens 11 ist in Figur 6 dargestellt. Er kann über die Seitenflächen des Plattenstapels gestülpt und auf geeignete Weise, z. B. durch Verkleben, dicht befestigt werden. Um den Wärmetauscher regelmäßig warten und reinigen zu können, wird der Sammelkasten vorzugsweise lösbar befestigt und auch die Verbindung der Platten lösbar ausgeführt. Der Sammelkasten kann in diesem Falle - wenigstens wo er am Plattenstapel anliegt - aus elastischem Material bestehen und mit einem Zugband 25 befestigt sein. Die Eintrittstrichter 19 können durch ein eingefügtes U-Profil 26 mit Durchtrittsöffnung 27 ausgesteift werden, um die Ränder 2 dicht schließend aufeinanderpressen zu können. Ein dichter Verschluß zweier aufeinanderliegender Ränder 2 kann auch mittels eines aufgesteckten U-Profils 28 erreicht werden.Another possibility for connecting a collecting tank 11 is shown in FIG. It can be placed over the side surfaces of the plate stack and in a suitable manner, for. B. by gluing, tightly attached. In order to be able to maintain and clean the heat exchanger regularly, the collecting box is preferably detachably fastened and the connection of the plates is also detachable. In this case, the collecting box can - at least where it rests against the stack of plates elastic material and be attached with a drawstring 25. The inlet funnels 19 can be stiffened by an inserted U-profile 26 with a passage opening 27 in order to be able to press the edges 2 tightly against one another. A tight seal between two superimposed edges 2 can also be achieved by means of an attached U-profile 28.

Claims (11)

1. Plattenwärmetauscherkörper, bestehend aus einen Stapel von gewellten Platten, zwischen denen durchströmbare Kanäle bestehen.
dadurch gekennzeichnet.
daß die Platten wenigstens in Teilbereichen in zwei kreuzweise zueinander liegenden Richtungen gewellt sind und daß in dem Stapel aufeinanderfolgende Platten so angeordnet sind. daß die Wellungen in dem kreuzweise gewellten Bereichen in der einen Richtung gleichphasig und in der anderen Richtung gegenphasig verlaufen.1. plate heat exchanger body, consisting of a stack of corrugated plates, between which flow-through channels exist.
characterized.
that the plates are corrugated at least in partial areas in two crosswise directions and that successive plates are arranged in the stack. that the corrugations in the cross-corrugated areas are in phase in one direction and in phase opposition in the other direction. 2. Plattenwärmetauscherkörper nach Anspruch 1. dadurch gekennzeichnet, daß alle Platten die gleiche rechteckige Grundfläche haben und daß die entsprechenden Außenkanten im Stapel jeweils in einer Ebene liegen.2. plate heat exchanger body according to claim 1, characterized in that all plates have the same rectangular base and that the corresponding outer edges in the stack are each in one plane. 3. Plattenwärmetauscherkörper nach den Ansprüchen 1 oder 2. dadurch gekennzeichnet. daß er als Kreuzstranrekuperator aufgebaut ist. wobei alle Platten gleichförmig gewellt sind und die Richtungen des gleichphasigen und gegenphasigen Verlaufs mit jeder Platte wechseln.3. plate heat exchanger body according to claims 1 or 2. characterized. that it is constructed as a cross-fuel recuperator. whereby all plates are corrugated uniformly and the directions of the in-phase and opposite-phase course change with each plate. 4. Plattenwärmetauscrerkörper nach den Ansprüche 1 oder 2. dadurch gekennzeichnet. daß er als Gleich- oder Gegenstrcmwärmetauscher aufgebaut ist, wobei die Wellungen aller Platten in der gleichen Richtung gleichphasig zueinander verlaufen.4. plate heat exchanger body according to claims 1 or 2. characterized. that he is the same or the opposite strcm heat exchanger is constructed, the corrugations of all plates in the same direction run in phase with each other. 5. Plattenwärmetauscherkörper nach Anspruch 4, dadurch gekennzeichnet, daß die Platten quer zur Richtung der gleichphasigen Wellung zwei gegenüberliegende äußere Bereiche (17) aufweisen, in denen sich die übereinandergestapelten Platten nicht berühren.5. plate heat exchanger body according to claim 4, characterized in that the plates transverse to the direction of the in-phase corrugation have two opposite outer regions (17) in which the stacked plates do not touch. 6. Plattenwärmetauscherkörper nach Anspruch 5, dadurch gekennzeichnet, daß die Platten in den genannten äußeren Bereichen (17) ungewellt sind.6. plate heat exchanger body according to claim 5, characterized in that the plates in the said outer regions (17) are not corrugated. 7. Plattenwärmetauscherkörper nach Anspruch 5, dadurch gekennzeichnet, daß alle Platten in den genannten äußeren Bereichen (17) kreuzweise gewellt und so gestapelt sind, daß die Wellungen in beiden Richtungen gleichphasig verlaufen.7. plate heat exchanger body according to claim 5, characterized in that all plates in said outer regions (17) are corrugated crosswise and stacked so that the corrugations are in phase in both directions. 8. Plattenwärmetauscherkörper nach den Ansprüchen 2 bis 7, dadurch gekennzeichnet, daß die Platten einen umlaufenden ungewellten Rand (2,3) parallel zur Mittelebene (18) haben.8. plate heat exchanger body according to claims 2 to 7, characterized in that the plates have a peripheral non-corrugated edge (2,3) parallel to the central plane (18). 9. Plattenwärmetauscherkörper nach Anspruch 8, dadurch gekennzeichnet, daß je zwei einander gegenüberliegende ungewellte Ränder (2,3) ein vom Niveau der Mittelebene (18) um eine Amplitudenhöhe der Wellung abweichendes Niveau haben, daß sich die Richtung dieser Niveauabweichung an jeder Ecke umgekehrt und daß in dem Stapel je zwei gegenüberliegende Ränder benachbarter Platten dicht aufeinanderliegen.9. plate heat exchanger body according to claim 8, characterized in that two mutually opposite undulating edges (2,3) have a level deviating from the level of the central plane (18) by an amplitude level of the corrugation that the direction of this level reversing at each corner and that in the stack two opposite edges of adjacent plates lie close together. 10. Plattenwärmetauscherkörper nach Anspruch 9, dadurch gekennzeichnet, daß die auf einander liegenden Ränder benachbarter Platten durch Kleb- oder Schweißverbindungen oder durch aufgesetzte U-Profile dichtend verbunden sind.10. plate heat exchanger body according to claim 9, characterized in that the mutually lying edges of adjacent plates are sealed by adhesive or welded connections or by U-profiles. 11. Plattenwärmetauscherkörper nach den Ansprüchen 1 bis 10, dadurch gekennzeichnet, daß er durch lösbare mechanische Mittel zusammengehalten wird und wiederholt zerlegbar ist.11. Plate heat exchanger body according to claims 1 to 10, characterized in that it is held together by releasable mechanical means and can be dismantled repeatedly.
EP86110554A 1985-08-06 1986-07-30 Plate heat exchanger Expired EP0211400B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8522627U DE8522627U1 (en) 1985-08-06 1985-08-06 Plate heat exchanger
DE8522627U 1985-08-06

Publications (2)

Publication Number Publication Date
EP0211400A1 true EP0211400A1 (en) 1987-02-25
EP0211400B1 EP0211400B1 (en) 1988-11-02

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ID=6783936

Family Applications (1)

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EP86110554A Expired EP0211400B1 (en) 1985-08-06 1986-07-30 Plate heat exchanger

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US (1) US4724902A (en)
EP (1) EP0211400B1 (en)
CA (1) CA1273005A (en)
DE (2) DE8522627U1 (en)

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WO2018067026A1 (en) * 2016-10-04 2018-04-12 Deta Engineering Llc Plate heat exchanger and design of seal unit therefor

Also Published As

Publication number Publication date
DE8522627U1 (en) 1985-09-19
CA1273005A (en) 1990-08-21
US4724902A (en) 1988-02-16
EP0211400B1 (en) 1988-11-02
DE3661112D1 (en) 1988-12-08

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