EP0578933B1 - Welded plate type heat exchanger - Google Patents
Welded plate type heat exchanger Download PDFInfo
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- EP0578933B1 EP0578933B1 EP93106729A EP93106729A EP0578933B1 EP 0578933 B1 EP0578933 B1 EP 0578933B1 EP 93106729 A EP93106729 A EP 93106729A EP 93106729 A EP93106729 A EP 93106729A EP 0578933 B1 EP0578933 B1 EP 0578933B1
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- plate
- plates
- type heat
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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
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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
- F28F2240/00—Spacing means
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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
- F28F2275/00—Fastening; Joining
- F28F2275/06—Fastening; Joining by welding
Definitions
- the invention relates to a plate heat exchanger with a plurality of profiled, substantially rectangular plates with inlet and outlet openings in the corner areas, which are arranged in a stack such that flow spaces between the plates can be alternately fed with a first and a heat-exchanging second medium, the Plates are connected to one another by welding and sealed from the environment, and the plate profiling is formed on both sides of the plates and accordingly forms apex planes on both sides.
- Welded plate heat exchangers have the advantage over heat exchangers with detachable plates that the elastic seals between the plates can be dispensed with. Therefore, welded plate heat exchangers can be operated at higher temperatures and pressures as well as with more aggressive media than heat exchangers with seals. In addition, there is no fear of malfunctions due to leaking seals that need to be replaced.
- Welded plate heat exchangers are known from the English patent applications 2 126 703 and 2 167 175, in which the spacing and welding of adjacent plates is carried out using separate metal sealing strips. These sealing strips are welded onto one plate in accordance with the desired flow, then the neighboring plate is aligned accordingly and in turn welded onto these metal strips. With regard to the latter welding process, it is necessary to weld through the upper plate. So that there is no damage to the previously made welded connection, the sealing strips must be staggered relative to one another in successive flow spaces. All of this leads to very high manufacturing costs for these plate heat exchangers.
- the present invention is therefore based on the object of specifying a plate heat exchanger in which all of the plates are welded to one another, but which is distinguished from the prior art by much less expensive production.
- the plates are angled several times along their outer circumference, so that they have an offset first peripheral region which runs parallel to the plate and which is aligned with the apex plane of the plate profile and offset a second parallel peripheral area, which is aligned with the opposite apex plane of the plate profiling, that the inlet and outlet openings of each plate for the one medium have annular surfaces which are approximately - preferably exactly - offset from one apex plane, while the inlet and outlet openings for the other medium have ring surfaces which are approximately — preferably exactly — offset from the other apex plane, and that two adjacent plates are continuous along the adjoining first edge regions and along or adjoining the ring surfaces forming bends in a cassette are welded, are welded while adjacent cassettes continuously along the adjacent second edge regions and along the annular surfaces or subsequent turns.
- the design according to the invention has the advantage that all plates can be shaped identically, so that only one type of stamp is necessary for the entire heat exchanger. To produce the cassettes, the plates only need to be rotated 180 ° against each other so that they come to lie back to back in pairs.
- the ring surfaces on one side of the plate longitudinal axis are offset opposite to the ring surfaces on the other side of the plate longitudinal axis.
- the plates then have to be rotated about their transverse axis and the media predominantly flow in the counterflow direction.
- edge areas as well as the ring surface of each plate are flat so that a problem-free, tight weld is guaranteed.
- a particularly advantageous embodiment of the invention consists in that the bends adjoining the ring surfaces are arranged approximately perpendicularly thereto and that these bends are alternately directed so that the plates which form a common cassette each have bends which can be plugged together.
- the disks of a cassette no longer need ver within the disk hole welded, but from the top of the plate, which is more accessible and visible. The welding is therefore easier and at the same time more reliable.
- bends of two plates to be put together are of unequal length, in such a way that the free edges of the bends are aligned when plugged together. This makes welding even easier.
- each plate has a large and slightly less protruding bend at the top and the same at the bottom.
- the first edge region, along which the plates are welded to form a cassette, is expediently connected to the second edge region by an intermediate piece running perpendicular to the plate plane, along which the cassettes are welded to one another.
- the edge areas immediately follow one another on the outside and a compact structure of the plate is obtained.
- the heat exchanger plates 1 of both designs have in common that they each have an opening 2 at their four corners for the inflow and outflow of the heat-exchanging media and that the field between these openings is profiled with shafts 8.
- These shafts 8 are arranged symmetrically with respect to the plate plane, that is to say they protrude by the same amount on both sides.
- both designs have in common that the plates are surrounded by a first edge region 3, this edge region being offset from one apex plane of the shafts 8, at least as far as the shafts 8 protrude.
- Two of the four openings 2 are offset by the same amount in one apex plane of the shafts 8 and the other two openings in the other apex plane of the shafts 8.
- the openings 2 are each surrounded by an annular surface 5 and 9, which join this offset.
- the two openings arranged in the left half of the plate, of which only the upper one is visible, are offset with their ring surfaces 9 as well as the first edge region 3, whereas the two openings arranged in the right half of the plate , of which only the upper one is also visible, are offset with their ring area 5 to the rear.
- an approximately cylindrical bend 5a and 9a adjoins the inner edge of the ring surfaces 5 and 9, respectively.
- the size and direction of these bends are chosen so that in the case of two plates with which a cassette is to be formed, the bends at openings 2 or 3, which should not have a passage to the space between the plates, are to be slid into one another and then the free edges of the bends are aligned when plugged together. This allows these bends to be welded easily and reliably from the top of the plate.
- a second edge region 4 adjoins the inner edge region 3 via an intermediate piece that runs perpendicular to the plate plane, but which runs in the opposite apex plane to the edge region 3.
- FIGS 3 and 4 show sections through the plate pack according to Figure 1, but the plates have no bends 5a and 9a.
- the welding at the inlet and outlet openings is carried out along the ring surfaces 5 and 9, which are adjacent to one another in pairs.
- the other plate construction according to FIGS. 1 a to 4 a differs in that the second edge region 4 is dispensed with, that is to say the plates run out with the first edge region 3 and that adjacent cassettes are connected by interposed U-profiles 10, cf. Figure 1a.
- These U-profiles 10 are dimensioned such that they fit flush into the space between the edge areas 3 of adjacent cassettes, so that their legs can easily be welded to these edge areas.
- the plates do not need to be welded together individually, but there is the advantageous possibility of laying the plates and U-profiles one on top of the other and welding two plates, which form a cassette, and two U-profiles placed on both sides in a single operation. eat.
- the plate heat exchanger is assembled in such a way that two plates belonging together are placed one on top of the other, so that, for example, the bends 5a are inserted into one another, so that the bends 5a are then welded together at both openings, and then a U-profile frame 10 and the third heat exchanger plate is placed so that their bends 9a are mated with the corresponding bends 9a of the second plate and then the bends 9a are welded together.
- This process is repeated with the placement of the fourth plate, which in turn is inserted and welded with the bends 5a.
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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
Description
Die Erfindung betrifft einen Plattenwärmetauscher mit mehreren profilierten, im wesentlichen rechteckigen Platten mit Ein- und Auslauföffnungen in den Eckbereichen, die derart in einem Stapel angeordnet sind, daß zwischen den Platten Strömungsräume abwechselnd mit einem ersten und einem damit wärmetauschenden zweiten Medium beschickbar sind, wobei die Platten durch Schweißen miteinander verbunden und gegenüber der Umgebung abgedichtet sind, und wobei die Plattenprofilierung beidseits der Platten ausgebildet ist und demgemäß beidseits Scheitelebenen bildet.The invention relates to a plate heat exchanger with a plurality of profiled, substantially rectangular plates with inlet and outlet openings in the corner areas, which are arranged in a stack such that flow spaces between the plates can be alternately fed with a first and a heat-exchanging second medium, the Plates are connected to one another by welding and sealed from the environment, and the plate profiling is formed on both sides of the plates and accordingly forms apex planes on both sides.
Geschweißte Plattenwärmetauscher haben gegenüber den Wärmetauschern mit lösbaren Platten den Vorteil, daß auf die elastischen Dichtungen zwischen den Platten verzichtet werden kann. Daher können geschweißte Plattenwärmetauscher mit höheren Temperaturen und Drücken wie auch mit aggressiveren Medien betrieben werden als Wärmetauscher mit Dichtungen. Darüber hinaus sind keine Betriebsstörungen durch undicht werdende und deshalb auszutauschende Dichtungen zu befürchten.Welded plate heat exchangers have the advantage over heat exchangers with detachable plates that the elastic seals between the plates can be dispensed with. Therefore, welded plate heat exchangers can be operated at higher temperatures and pressures as well as with more aggressive media than heat exchangers with seals. In addition, there is no fear of malfunctions due to leaking seals that need to be replaced.
Durch die englischen Patentanmeldungen 2 126 703 und 2 167 175 sind geschweißte Plattenwärmetauscher bekannt, bei denen die Distanzierung und Verschweißung benachbarter Platten über separate Dichtungsstreifen aus Metall erfolgt. Diese Dichtungsstreifen werden entsprechend der gewünschten Strömungsbeaufschlagung auf die eine Platte geschweißt, sodann wird die Nachbarplatte entsprechend ausgerichtet und ihrerseits auf diese Metallstreifen angeschweißt. Hinsichtlich des letztgenannten Schweißvorganges ist es jeweils notwendig, durch die obere Platte hindurchzuschweißen. Damit es hier nicht zu Schädigungen der zuvor hergestellten Schweißverbindung kommt, müssen die Dichtungsstreifen in aufeinanderfolgenden Strömungszwischenräumen jeweils relativ zueinander versetzt angeordnet werden. All dies führt zu sehr hohem Herstellungsaufwand für diese Plattenwärmetauscher.Welded plate heat exchangers are known from the
Dervorliegenden Erfindung liegt deshalb die Aufgabe zugrunde, einen Plattenwärmetauscheranzugeben, bei dem alle Platten miteinander verschweißt sind, der sich jedoch gegenüber dem Stand der Technik durch wesentlich kostengünstigere Herstellung auszeichnet.The present invention is therefore based on the object of specifying a plate heat exchanger in which all of the plates are welded to one another, but which is distinguished from the prior art by much less expensive production.
Diese Aufgabe wird für den eingangs genannten Wärmetauscher mit Plattenprofilierung erfindungsgemäß dadurch gelöst, daß die Platten längs ihrem äußeren Umfang mehrfach abgewinkelt sind, so daß sie einen versetzten ersten parallel zur Platte umlaufenden Randbereich aufweisen, der mit der einen Scheitelebene der Plattenprofilierung fluchtet und einen zweiten versetzten hierzu parallel umlaufenden Randbereich, der mit der gegenüber liegenden Scheitelebene der Plattenprofilierung fluchtet, daß gleichermaßen die Ein- und Auslauföffnung jeder Platte für das eine Medium Ringflächen aufweisen, die etwa - vorzugsweise genau - zu der einen Scheitelebene versetzt sind, während die Ein- und Auslauföffnung für das andere Medium Ringflächen aufweisen, die etwa - vorzugsweise genau - zu der anderen Scheitelebene versetzt sind, und daß jeweils zwei benachbarte Platten durchgehend entlang den aneinanderliegenden ersten Randbereichen und entlang den Ringflächen oder daran anschließenden Abbiegungen zu einer Kassette verschweißt sind, während benachbarte Kassetten durchgehend entlang den aneinanderliegenden zweiten Randbereichen und entlang den Ringflächen oder daran anschließenden Abbiegungen verschweißt sind.This object is achieved according to the invention for the heat exchanger with plate profiling mentioned at the outset in that the plates are angled several times along their outer circumference, so that they have an offset first peripheral region which runs parallel to the plate and which is aligned with the apex plane of the plate profile and offset a second parallel peripheral area, which is aligned with the opposite apex plane of the plate profiling, that the inlet and outlet openings of each plate for the one medium have annular surfaces which are approximately - preferably exactly - offset from one apex plane, while the inlet and outlet openings for the other medium have ring surfaces which are approximately — preferably exactly — offset from the other apex plane, and that two adjacent plates are continuous along the adjoining first edge regions and along or adjoining the ring surfaces forming bends in a cassette are welded, are welded while adjacent cassettes continuously along the adjacent second edge regions and along the annular surfaces or subsequent turns.
Auf diese Weise erübrigt sich das Anbringen separater Dichtungsleisten. Vielmehr brauchen lediglich die aneinanderliegenden Plattenränder miteinander verschweißt zu werden, was angesichts der dünnen Wandstärke der Platten keine Probleme macht. Wesentlich ist dabei, daß durch den gezielten Versatz der Ringflächen und gegebenenfalls der Abbiegungen an den Ein- und Auslaßöffnungen auch dort ohne zusätzliche Maßnahmen die zum Trennen der Produktströme notwendige Verschweißung längs aneinanderliegender Plattenbereiche möglich ist.In this way, there is no need to attach separate sealing strips. Rather, only the adjacent plate edges need to be welded together, which makes no problems in view of the thin wall thickness of the plates. It is essential that the targeted offset of the ring surfaces and, if necessary, the bends at the inlet and outlet openings also makes it possible to weld longitudinally adjacent plate regions there without additional measures, to separate the product streams.
Darüber hinaus bietet die erfindungsgemäße Gestaltung den Vorteil, daß alle Platten identisch geprägt sein können, daß also für den gesamten Wärmetauscher nur ein Stempeltyp notwendig ist. Zur Herstellung der Kassetten brauchen die Platten lediglich um 180° gegeneinander verdreht zu werden, damit sie paarweise Rücken an Rücken zu liegen kommen.In addition, the design according to the invention has the advantage that all plates can be shaped identically, so that only one type of stamp is necessary for the entire heat exchanger. To produce the cassettes, the plates only need to be rotated 180 ° against each other so that they come to lie back to back in pairs.
Strömungstechnisch besonders günstig ist es, wenn die Ringflächen an der einen Seite der Plattenlängsachse entgegengesetzt zu den Ringflächen an der anderen Seite der Plattenlängsachse versetzt sind. Die Platten müssen dann um ihre Querachse verdreht werden und die Medien strömen überwiegend in Gegenstromrichtung. Selbstverständlich liegt es aber auch im Rahmen der Erfindung, die Ringflächen relativ zur Plattenquerachse zu versetzen.From a fluidic point of view, it is particularly favorable if the ring surfaces on one side of the plate longitudinal axis are offset opposite to the ring surfaces on the other side of the plate longitudinal axis. The plates then have to be rotated about their transverse axis and the media predominantly flow in the counterflow direction. Of course, it is also within the scope of the invention to offset the ring surfaces relative to the transverse axis of the plate.
In allen Fällen empfiehlt es sich, daß die Randbereiche wie auch die Ringfläche jeder Platte plan ausgebildet sind, damit eine problemlose, dichte Schweißung gewährleistet ist.In all cases, it is recommended that the edge areas as well as the ring surface of each plate are flat so that a problem-free, tight weld is guaranteed.
Eine besonders zweckmäßige Ausgestaltung der Erfindung besteht darin, daß die sich an die Ringflächen anschließenden Abbiegungen etwa senkrecht dazu angeordnet sind und daß diese Abbiegungen abwechselnd so gerichtet sind, daß die Platten, die eine gemeinsame Kassette bilden, jeweils zusammensteckbare Abbiegungen aufweisen. Dadurch brauchen die Platten einer Kassette nicht mehr innerhalb des Plattenloches verschweißt werden, sondern von der Plattenoberseite, die besser zugänglich und sichtbar ist. Die Verschweißung wird daher leichter und gleichzeitig zuverlässiger.A particularly advantageous embodiment of the invention consists in that the bends adjoining the ring surfaces are arranged approximately perpendicularly thereto and that these bends are alternately directed so that the plates which form a common cassette each have bends which can be plugged together. As a result, the disks of a cassette no longer need ver within the disk hole welded, but from the top of the plate, which is more accessible and visible. The welding is therefore easier and at the same time more reliable.
Dabei ist es besonders günstig, wenn die zusammenzusteckenden Abbiegungen zweier Platten ungleich lang sind, derart, daß die freien Ränder der Abbiegungen in zusammengestecktem Zustand fluchten. Dadurch wird das Verschweißen nochmals erleichtert.It is particularly expedient if the bends of two plates to be put together are of unequal length, in such a way that the free edges of the bends are aligned when plugged together. This makes welding even easier.
Bei dieser Bauform hat also jede Platte oben eine weit und eine etwas weniger weit vorstehende Abbiegung und unten ebenso.With this design, each plate has a large and slightly less protruding bend at the top and the same at the bottom.
Der erste Randbereich, längs dem die Platten zur Bildung einer Kassette verschweißt werden, ist zweckmäßig durch ein senkrecht zur Plattenebene umlaufendes Zwischenstück mit dem zweiten Randbereich verbunden, längs dem die Kassetten miteinander verschweißt werden. Dadurch folgen die Randbereiche nach außen unmittelbar aufeinander und man erhält einen kompakten Aufbau der Platte.The first edge region, along which the plates are welded to form a cassette, is expediently connected to the second edge region by an intermediate piece running perpendicular to the plate plane, along which the cassettes are welded to one another. As a result, the edge areas immediately follow one another on the outside and a compact structure of the plate is obtained.
In Weiterbildung der Erfindung bietet sich auch die Möglichkeit, den zweiten, außen liegenden Randbereich wegzulassen und die Verschweißung benachbarter Kassetten derart durchzuführen, daß ein umlaufendes U-Profil zwischen benachbarte Kassetten eingelegt wird, das mit seinen beiden Schenkeln an den voneinander distanzierten Seiten der ersten Randbereiche anliegt und mit diesen durchgehend verschweißt wird. Dieses U-Profil hat zweckmäßig die Form eines Rahmens, kann aber auch aus einzelnen Stücken zusammengesetzt werden.In a further development of the invention, there is also the possibility of omitting the second, outer edge region and of welding adjacent cassettes in such a way that a circumferential U-profile is inserted between neighboring cassettes, the two legs of which on the spaced apart sides of the first edge regions is applied and is continuously welded to them. This U-profile has the shape of a frame, but can also be assembled from individual pieces.
Weitere Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung; dabei zeigt
Figur 1 drei im oberen Lochbereich geschnittene Platten in Schrägansicht gemäß einer ersten Bauform;Figur 2 die Draufsicht auf eine solche Platte;Figur 3 eine schematische Seitenansicht durch einen Stapel solcher Platten;Figur 4 eine Ansicht von oben auf diesen Stapel und- Figur 1 a bis Figur 4a die gleichen Ansichten wie die zuvor genannten Figuren bei einer zweiten Plattenbauform.
- Figure 1 three cut in the upper hole area in oblique view according to a first design;
- Figure 2 is a plan view of such a plate;
- Figure 3 is a schematic side view through a stack of such plates;
- Figure 4 is a top view of this stack and
- Figure 1 a to 4a, the same views as the aforementioned figures in a second plate design.
Den Wärmetauscherplatten 1 beider Bauformen ist gemeinsam, daß sie an ihren vier Ecken jeweils eine Öffnung 2 für den Zu- und Ablauf derwärmetauschenden Medien aufweisen und daß das Feld zwischen diesen Öffnungen mit Wellen 8 profiliert ist. Diese Wellen 8 sind symmetrisch bezüglich der Plattenebene angeordnet, stehen also beidseits um das gleiche Maß vor.The
Außerdem ist beiden Bauformen gemeinsam, daß die Platten von einem ersten Randbereich 3 umgeben sind wobei dieser Randbereich zu der einen Scheitelebene der Wellen 8 hin versetzt ist, und zwar mindestens so weit, wie die Wellen 8 vorstehen. Um das gleiche Maß sind auch zwei der vier Öffnungen 2 in die eine Scheitelebene der Wellen 8 und die beiden anderen Öffnungen in die andere Scheitelebene der Wellen 8 versetzt. Dabei sind die Öffnungen 2 jeweils von einer Ringfläche 5 bzw. 9 umgeben, die diesen Versatz mitmachen.In addition, both designs have in common that the plates are surrounded by a
Bezogen auf die vordere Platte in Figur 1 sind also die beiden in der linken Plattenhälfte angeordneten Öffnungen, von denen nur die obere sichtbar ist, mit ihren Ringflächen 9 ebenso wie der erste Randbereich 3 nach vorn versetzt, wogegen die beiden in der rechten Plattenhälfte angeordneten Öffnungen, von denen ebenfalls nur die obere sichtbar ist, mit ihrem Ringbereich 5 nach hinten versetzt sind.With respect to the front plate in FIG. 1, the two openings arranged in the left half of the plate, of which only the upper one is visible, are offset with their
Insoweit stimmen beide Plattenbauformen überein.In this respect, both plate designs are the same.
Bei der Plattenbauform gemäß den Figuren 1 bis 4 schließt sich an den Innenrand der Ringflächen 5 und 9 jeweils eine etwa zylindrische Abbiegung 5a bzw. 9a an. Größe und Richtung dieser Abbiegungen sind so gewählt, daß bei zwei Platten, mit denen eine Kassette gebildet werden soll, die Abbiegungen an den Öffnungen 2 oder 3, die keinen Durchlaß zum Plattenzwischenraum aufweisen sollen, gleitend ineinander zu stecken sind und daß dann die freien Ränder der Abbiegungen in zusammengestecktem Zustand miteinander fluchten. Dadurch können diese Abbiegungen von der Plattenoberseite her einfach und zuverlässig verschweißt werden.In the plate design according to FIGS. 1 to 4, an approximately
Außerdem schließt sich an den inneren Randbereich 3 über ein senkrecht zur Plattenebene umlaufendes Zwischenstück ein zweiter Randbereich 4 an, der jedoch in der entgegengesetzten Scheitelebene verläuft wie der Randbereich 3.In addition, a
Die Verbindung dieser Plattenbauform geschieht wie folgt: An die hintere Wärmetauschplatte 1 in Figur 1 wird eine gleichartige Wärmetauschplatte - jedoch mit entgegengesetzten Abbiegungen - in umgekehrter Orientierung, das heißt 180° um die Querachse gedreht, gelegt. Dann liegen beide Platten, also die hintere und die mittlere, längs dem ersten Randbereich 3 sowie längs den beiden Ringflächen 9 und den ineinandererstreckenden Abbiegungen 9a aneinander und werden längs dem Randbereich 3 sowie stumpf am Rand der Abbiegungen 9a zusammengeschweißt. So entsteht eine erste Kassette mit einem Strömungskanal 6 wie in den Bildern 1, 3 und 4 dargestellt.The connection of this plate design takes place as follows: A similar heat exchange plate is placed on the rear
Weitere, gleichermaßen hergestellte Kassettten werden dann Rücken an Rücken aneinandergelegt und durch Verschweißen entlang den aneinanderliegenden äußeren Randbereichen 4 und den ineinandererstreckenden Abbiegungen 5a miteinander verschweißt, wobei der ZwischenkassettenkanaI 7 entsteht. Auf diese Weise wird weiter vorgegangen, bis der Plattenstapel die gewünschte Größe hat, etwa entsprechend Figur 3 und 4.Additional cassettes made in the same way are then placed back to back welded to one another by welding along the adjacent
Stattdessen ist es ebenso möglich, zuerst alle Kassetten herzustellen, indem die Randbereiche 3 und Abbiegungen 9a aller Plattenpaare miteinander verschweißt werden und später alle Kassetten längs den äußeren Randbereichen 4 und den Abbiegungen 5a zu verschweißen.Instead, it is also possible to first produce all the cassettes by welding the
Ebenso ist es stattdessen möglich, eine Platte nach der anderen anzuschweißen, und zwar jeweils längs den Abbiegungen 5a und 9a sowie längs der Randbereiche 3 und erst am Schluß das komplette Plattenpaket längs der äußeren Randbereiche 4 zu verschweißen.It is also possible instead to weld one plate after the other, namely along the
Die Figuren 3 und 4 zeigen Schnitte durch das Plattenpaket gemäß Figur 1, wobei die Platten jedoch keine Abbiegungen 5a und 9a aufweisen. Die Verschweißung an den Ein- und Auslauföffnungen erfolgt in diesem Fall längs den paarweise aneinanderliegenden Ringflächen 5 bzw. 9.Figures 3 and 4 show sections through the plate pack according to Figure 1, but the plates have no
Die andere Plattenbauform gemäß den Figuren 1 a bis 4a unterscheidet sich dadurch, daß auf den zweiten Randbereich 4 verzichtet wird, die Platten also mit dem ersten Randbereich 3 auslaufen und daß die Verbindung benachbarter Kassetten durch zwischengelegte U-Profile 10 erfolgen, vgl. Figur 1a. Diese U-Profile 10 sind so bemessen, daß sie in den Zwischenraum zwischen den Randbereichen 3 benachbarter Kassetten bündig hineinpassen, so daß ihre Schenkel leicht mit diesen Randbereichen verschweißt werden können.The other plate construction according to FIGS. 1 a to 4 a differs in that the
Bei dieser Bauform brauchen die Platten nicht einzeln zusammengeschweißt werden, sondern es besteht die vorteilhafte Möglichkeit, die Platten und U-Profile übereinander zu legen und jeweils zwei Platten, die eine Kassette bilden, und zwei beidseits aufgelegte U-Profile in einem einzigen Arbeitsgang zusammenzuschwei- ßen.With this design, the plates do not need to be welded together individually, but there is the advantageous possibility of laying the plates and U-profiles one on top of the other and welding two plates, which form a cassette, and two U-profiles placed on both sides in a single operation. eat.
Am zweckmäßigsten erfolgt der Zusammenbau des Plattenwärmetauschers in der Weise, daß zwei zusammengehörende Platten aufeinandergelegt werden, so daß beispielsweise die Abbiegungen 5a ineinanderstecken, daß sodann gleichzeitig an beiden Öffnungen die Abbiegungen 5a miteinander verschweißt werden, daß anschließend ein U-Profilrahmen 10 und die dritte Wärmetauscherplatte aufgelegt wird, so daß ihre Abbiegungen 9a mit den korrespondierenden Abbiegungen 9a der zweiten Platte ineinanderstecken und daß sodann die Abbiegungen 9a miteinander verschweißt werden. Dieser Vorgang wiederholt sich mit dem Auflegen der vierten Platte, die wiederum mit den Abbiegungen 5a eingesteckt und verschweißt wird. Wenn das komplette Plattenpaket derart an den Öffnungen verschweißt ist, werden zum Schluß alle Außenränder verschweißt.Most conveniently, the plate heat exchanger is assembled in such a way that two plates belonging together are placed one on top of the other, so that, for example, the
Auch bei dieser Bauform besteht die Möglichkeit, die Abbiegungen 5a und 9a wegzulassen und stattdessen die Verschweißung längs der aneinanderliegenden Ringflächen 5 oder 9 vorzunehmen. Diese Variante ist in den Figuren 1 bis 4a dargestellt.With this type of construction there is also the possibility of omitting the
Diese Verschweißung ist zwar von der Zugänglichkeit her etwas problematisch, bietet aber dafür den Vorteil, daß der gesamte Wärmetauscher aus absolut identischen Platten zusammengebaut werden kann, wogegen man bei dem eingangs beschriebenen Ausführungsbeispiel zwei leicht unterschiedliche Plattentypen benötigt, weil die Abbiegungen einmal nach vorn, einmal nach hinten und mit unterschiedlicher Länge vorstehen müssen. In der Praxis hat dies kaum Bedeutung. Daher kann die Verschweißung über die abgebogenen Ränder 5a oder 9a auch bei der Bauform gemäß den Figuren 1a bis 4a vorteilhaft angewendet werden.This welding is somewhat problematic in terms of accessibility, but it offers the advantage that the entire heat exchanger can be assembled from absolutely identical plates, whereas two slightly different plate types are required in the exemplary embodiment described at the outset, because the bends are made once towards the front and once must protrude to the rear and with different lengths. In practice, this is of little importance. Therefore, the welding over the
Claims (12)
characterised in that
along their outer periphery the plates (1) are multiply bent so that they have a first, offset peripheral edge region (3) parallel to the plate and aligned with one of the peak (vertex) planes of the plate profiling (8) and a second offset peripheral edge region (4) which extends parallel to the first edge region and which is aligned with the oppositely lying peak plane of the plate profiling (8), in that in equal measure the inlet and outlet openings (20 of each plate have annular surfaces (9) for one of the media which surfaces are offset approximately to the first-mentioned peak plane of the plate profiling, while the inlet and outlet openings (2) for the other medium have annular surfaces (5) offset approximately to the other peak plane, and in that in each case two adjacent plates are continuously welded together into a box structure along the first edge regions (3) bearing against each other and along the annular surfaces (9) or the best parts (9a) adjoining them, which adjacent box structures are welded together throughout the second edge regions (4) and the annular surfaces (5) or the bent parts (5a) adjoining them.
characterised in that
all the plates have an identical shape but are alternately angularly displaced by 180°.
characterised in that
the annular surfaces (5) on one side of the longitudinal axis of the plate are offset oppositely to the annular surfaces (9) of the opposite side of the longitudinal axis of the plate.
characterised in that
the two mentioned edge regions (3, 4) of each plate are flat.
characterised in that
the two annular surfaces (5, 9) of the openings (2) are flat.
characterised in that
the bent parts (5a, 9a) extend approximately perpendicularly to the annular surfaces (5, 9) and the plates of a box structure have respective bent parts (5a, 9a) that can be fitted into each other.
characterised in that
the plate of a box structure lying at the rear relative to the bend has longer bent parts such that the free edges of the bent parts are aligned with each other in the fitted together condition.
characterised in that
the plates are identically profiled but are divided into two types of plates relative to the direction of the bend of the bended parts.
characterised in that
the two edge regions (3,4) are connected together by way of an intermediate piece extending peripherally at a right angle to the planes of the plates.
characterised in that
the welding together of adjacent box structures takes place, while omitting the second edge region (4), by way of a peripheral, inserted profiled member (10) of approximately U-shape the two limbs of which bear against at the mutually spaced apart sides of the first edge region (3) and which is continuously welded together with these sides.
characterised in that
the profiled member (10) is a prefabricated frame.
characterised in that
the weld seams are formed as frontal seams along the bent parts (5a, 9a) and along the edge regions (4) or along the edge regions (3) and profiled parts (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4223321 | 1992-07-16 | ||
| DE4223321A DE4223321A1 (en) | 1992-07-16 | 1992-07-16 | Welded plate heat exchanger |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0578933A1 EP0578933A1 (en) | 1994-01-19 |
| EP0578933B1 true EP0578933B1 (en) | 1995-12-06 |
| EP0578933B2 EP0578933B2 (en) | 1999-03-24 |
Family
ID=6463292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93106729A Expired - Lifetime EP0578933B2 (en) | 1992-07-16 | 1993-04-26 | Welded plate type heat exchanger |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5327958A (en) |
| EP (1) | EP0578933B2 (en) |
| AT (1) | ATE131279T1 (en) |
| DE (2) | DE4223321A1 (en) |
| ES (1) | ES2080554T5 (en) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9200213D0 (en) * | 1992-01-27 | 1992-01-27 | Alfa Laval Thermal Ab | WELDED PLATE HEAT EXCHANGER |
| US5471913A (en) * | 1994-04-21 | 1995-12-05 | Margittai; Thomas B. | Apparatus for heating, mixing, and sealing a fluid |
| SE502638C2 (en) * | 1994-05-18 | 1995-11-27 | Tetra Laval Holdings & Finance | Flat heat exchangers with permanently joined modules |
| SE502779C2 (en) * | 1994-05-18 | 1996-01-08 | Tetra Laval Holdings & Finance | Welded plate heat exchanger and method for welding heat transfer plates to a plate heat exchanger |
| DE19617396C2 (en) * | 1996-05-02 | 1998-03-26 | Dornier Gmbh | Flow module |
| DK174409B1 (en) * | 1998-01-12 | 2003-02-17 | Apv Heat Exchanger As | Heat exchanger plate with reinforced edge design |
| DE19802012C2 (en) * | 1998-01-21 | 2002-05-23 | Modine Mfg Co | Caseless plate heat exchanger |
| SE512240C2 (en) | 1998-06-24 | 2000-02-14 | Alfa Laval Ab | Ways of joining at least four heat transfer plates to a plate package and plate package |
| DE19846518B4 (en) * | 1998-10-09 | 2007-09-20 | Modine Manufacturing Co., Racine | Heat exchangers, in particular for gases and liquids |
| CA2260890A1 (en) * | 1999-02-05 | 2000-08-05 | Long Manufacturing Ltd. | Self-enclosing heat exchangers |
| SE513784C2 (en) * | 1999-03-09 | 2000-11-06 | Alfa Laval Ab | Permanently joined plate heat exchanger |
| DE19959780B4 (en) * | 1999-04-12 | 2004-11-25 | Rehberg, Peter, Dipl.-Ing. | Plate heat exchangers |
| DE19917761C1 (en) * | 1999-12-07 | 2001-01-18 | Peter Rehberg | Plate heat exchanger has stacked rectangular heat exchanger plates provided with flow openings at corners for each transfer medium enclosed by flat ring on one side and raised teeth on opposite side of plate |
| DE19939264B4 (en) * | 1999-08-19 | 2005-08-18 | Behr Gmbh & Co. Kg | Plate heat exchangers |
| SE516178C2 (en) * | 2000-03-07 | 2001-11-26 | Alfa Laval Ab | Heat transfer plate, plate package, plate heat exchanger and the use of plate and plate package respectively for the production of plate heat exchanger |
| US20020162646A1 (en) | 2001-03-13 | 2002-11-07 | Haasch James T. | Angled turbulator for use in heat exchangers |
| US7004237B2 (en) * | 2001-06-29 | 2006-02-28 | Delaware Capital Formation, Inc. | Shell and plate heat exchanger |
| SE524783C2 (en) * | 2003-02-11 | 2004-10-05 | Alfa Laval Corp Ab | Plate package, plate heat exchanger and plate module |
| SE524883C2 (en) * | 2003-12-10 | 2004-10-19 | Swep Int Ab | Plate type heat exchanger, has separate low temperature flow channels extending around high temperature flow inlet |
| US7624788B2 (en) * | 2004-04-22 | 2009-12-01 | State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of The University Of Oregon | Heat exchanger |
| ATE350636T1 (en) * | 2004-05-06 | 2007-01-15 | Movi Alluminium S R L | HEAT EXCHANGER |
| DE102004022433B4 (en) * | 2004-05-06 | 2007-01-04 | Joachim Schult | Profiled heat transfer plate for a welded heat exchanger |
| DE102004032085A1 (en) * | 2004-06-28 | 2006-01-12 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Compound building element with at least one temperature control channel with a temperature control fluid takes the form of a stack of metal plates with interruption zones forming temperature control channels |
| CA2477817C (en) * | 2004-08-16 | 2012-07-10 | Dana Canada Corporation | Stacked plate heat exchangers and heat exchanger plates |
| JP2006284165A (en) * | 2005-03-07 | 2006-10-19 | Denso Corp | Exhaust gas heat exchanger |
| US20070158055A1 (en) * | 2006-01-09 | 2007-07-12 | Man Zai Industrial Co., Ltd. | Heat dissipating device |
| US8453721B2 (en) * | 2007-01-31 | 2013-06-04 | Tranter, Inc. | Seals for a stacked-plate heat exchanger |
| DE102007063634B4 (en) * | 2007-11-26 | 2009-10-15 | Gesmex Gmbh | Method for connecting at least two heat exchanger plates |
| SE534915C2 (en) * | 2010-06-18 | 2012-02-14 | Alfa Laval Corp Ab | Plate heat exchanger and method for manufacturing a plate heat exchanger |
| EP2604962B1 (en) * | 2011-12-13 | 2014-10-15 | Vahterus Oy | Plate heat exchanger and method for manufacturing a plate heat exchanger |
| DE102013213398A1 (en) * | 2013-07-09 | 2015-01-15 | Elringklinger Ag | Method for connecting a plurality of functional elements |
| US20150129181A1 (en) * | 2013-11-11 | 2015-05-14 | Tranter, Inc. | Modular heat exchanger |
| US11745118B1 (en) | 2022-06-02 | 2023-09-05 | Ace Machine Design Llc | Mechanical vapor recompression solvent recovery |
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|---|---|---|---|---|
| FR1192623A (en) * | 1959-12-26 | 1959-10-27 | parallel plate countercurrent heat exchanger | |
| DE1601216B2 (en) * | 1967-11-03 | 1971-06-16 | Linde Ag, 6200 Wiesbaden | TIN PANEL FOR PLATE HEAT EXCHANGER WITH A STACK OF SUCH TIN PANELS |
| DE1928146A1 (en) * | 1968-06-06 | 1969-12-11 | Delaney Gallay Ltd | Heat exchanger |
| FR2280871A1 (en) * | 1974-08-01 | 1976-02-27 | Chausson Usines Sa | Built-up construction heat exchanger - has panels with peripheral support surface and embossed crown sections |
| GB2126703B (en) * | 1982-09-07 | 1986-07-09 | Apv Int Ltd | Plate heat exchanger |
| US4592914A (en) * | 1983-06-15 | 1986-06-03 | James River-Dixie/Northern, Inc. | Two-blank disposable container for microwave food cooking |
| GB8429359D0 (en) * | 1984-11-21 | 1985-01-03 | Apv Int Ltd | Heat exchanger |
| US4723601A (en) * | 1985-03-25 | 1988-02-09 | Nippondenso Co., Ltd. | Multi-layer type heat exchanger |
| JPH063352B2 (en) * | 1987-07-27 | 1994-01-12 | 栄産業株式会社 | Panel heat exchanger |
| US4872578A (en) * | 1988-06-20 | 1989-10-10 | Itt Standard Of Itt Corporation | Plate type heat exchanger |
| SE9000712L (en) * | 1990-02-28 | 1991-08-29 | Alfa Laval Thermal | PERMANENT COMBINED PLATE HEAT EXCHANGER |
| US5158135A (en) * | 1990-06-05 | 1992-10-27 | Zexel Corporation | Laminate type heat exchanger |
| US5125453A (en) * | 1991-12-23 | 1992-06-30 | Ford Motor Company | Heat exchanger structure |
-
1992
- 1992-07-16 DE DE4223321A patent/DE4223321A1/en not_active Withdrawn
-
1993
- 1993-04-26 AT AT93106729T patent/ATE131279T1/en active
- 1993-04-26 EP EP93106729A patent/EP0578933B2/en not_active Expired - Lifetime
- 1993-04-26 ES ES93106729T patent/ES2080554T5/en not_active Expired - Lifetime
- 1993-04-26 DE DE59301080T patent/DE59301080D1/en not_active Expired - Lifetime
- 1993-06-22 US US08/081,648 patent/US5327958A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0578933A1 (en) | 1994-01-19 |
| ES2080554T3 (en) | 1996-02-01 |
| EP0578933B2 (en) | 1999-03-24 |
| ATE131279T1 (en) | 1995-12-15 |
| DE59301080D1 (en) | 1996-01-18 |
| US5327958A (en) | 1994-07-12 |
| DE4223321A1 (en) | 1994-01-20 |
| ES2080554T5 (en) | 1999-08-01 |
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