EP1087851B1 - Echangeur thermique a plaques et son procede de fabrication - Google Patents

Echangeur thermique a plaques et son procede de fabrication Download PDF

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Publication number
EP1087851B1
EP1087851B1 EP19990931659 EP99931659A EP1087851B1 EP 1087851 B1 EP1087851 B1 EP 1087851B1 EP 19990931659 EP19990931659 EP 19990931659 EP 99931659 A EP99931659 A EP 99931659A EP 1087851 B1 EP1087851 B1 EP 1087851B1
Authority
EP
European Patent Office
Prior art keywords
plate
connection
heat exchanger
end plate
sleeve
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.)
Expired - Lifetime
Application number
EP19990931659
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German (de)
English (en)
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EP1087851A1 (fr
Inventor
Tommy Roland Augustsson
Lars-Einar Gustavsson
Emil Maretic
Bror Magnus Nilsson
Mats Nilsson
Ib Rasmussen
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Alfa Laval Corporate AB
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Alfa Laval Corporate AB
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Filing date
Publication date
Priority claimed from SE9802175A external-priority patent/SE9802175D0/xx
Application filed by Alfa Laval Corporate AB filed Critical Alfa Laval Corporate AB
Publication of EP1087851A1 publication Critical patent/EP1087851A1/fr
Application granted granted Critical
Publication of EP1087851B1 publication Critical patent/EP1087851B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • F28F9/002—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core with fastening means for other structures

Definitions

  • the present invention concerns a method of producing a plate heat exchanger for heat exchange between two heat exchange fluids, which comprises heat transfer plates provided with so called port holes, an end plate provided with at least one opening and a connection plate, which is adapted for connection of the plate heat exchanger to a conduit, constituting an inlet or outlet for one of the said heat exchange fluids, and which is provided with a through hole.
  • the method comprises stacking of the heat transfer plates to a plate package, with brazing material arranged between the heat transfer plates, such that the port holes form port channels through the plate package.
  • the end plate is placed against an outer heat transfer plate in the plate package, with a brazing material arranged between the end plate and the outer heat transfer plate, such that said opening in the end plate communicates with one of the port channels.
  • the connection plate is placed such that the through hole in the connection plate and the opening in the end plate form respective parts of a connection channel.
  • the plate package, the end plate and the connection plate are brazed together by means of brazing material.
  • the heat transfer plates delimit between them at least two sets of heat transfer passages. Every second heat transfer passage is included in one of the sets and communicates with two of the port channels, the remaining passages being included in the second set of heat transfer passages and communicating with two other port channels.
  • every second heat transfer passage is included in one of the sets and communicates with two of the port channels, the remaining passages being included in the second set of heat transfer passages and communicating with two other port channels.
  • conduits to a plate heat exchanger there are several different ways of connecting conduits to a plate heat exchanger, through which conduits heat exchange fluid is intended to flow to and from the plate heat exchanger, e.g. by welding of the conduits to connection devices formed as pipe sockets or by means of nuts arranged on threaded pipe sockets.
  • a conduit of the said kind is brought to abut against the said connection plate.
  • the conduit is provided with an external thread and is screwed into a corresponding internal thread in the connection plate in the through hole, such that the conduit in both alternatives may communicate with the through hole in the connection plate.
  • connection plate Fixing of a connection plate in relation to an adjacent end plate during brazing together of a plate heat exchanger is associated with certain problems.
  • the heat transfer plates are usually formed with bent edge portions acting to guide adjacent heat transfer plates in the plate package.
  • the end plate is provided with guiding members of one kind or another, which fix the end plate in relation to the outer heat transfer plate in the plate package.
  • the connection plate on the other hand, is not provided with any guiding member, which fixes the same in relation to the end plate.
  • the connection plate is often considerably thicker than the end plate, which means that it is difficult both to bend the connection plate and to keep it plane.
  • connection plate is of great importance; partly, because the connection plate in many cases must be plane in order to seal against the conduits for the heat exchange fluids and, partly, because the brazing joint between the connection plate and the end plate has to be tight, so that heat exchange fluids cannot leak out of the plate heat exchanger between the connection plate and the end plate, or penetrate to between these two plates and give rise to damage on the plate heat exchanger.
  • connection plate has been fixed in relation to the end plate before a brazing operation by being spot welded to the same.
  • This mainly causes to two problems; the connection plate becomes less plane as a result of the spot welding, and it is difficult during the spot welding to keep the through hole in the connection plate exactly opposite to the opening in the end plate.
  • WO 86/05866 there is disclosed a brazed plate heat exchanger of the same general type as that described below with reference to Figures 1 and 2, wherein instead of a connection plate there are fixed to the end plate sleeve couplings or pipe sockets.
  • the sleeve couplings have extensions of reduced thickness which are inserted through aligned holes in the end plate and one or two heat exchange plates and which then have their ends deformed to form flanges so as to provide a first fixing of the sleeve couplings before the heat exchanger is assembled for brazing.
  • Plate heat exchangers of this kind do not have connection plates or the production difficulties associated with connection plates.
  • the object of the present invention is to present a solution to the problem discussed above, such that the production of plate heat exchangers of the kind here in question is simplified and such that the connection plate can be maintained plane.
  • This object can be achieved by a method according to claim 1 or a brazed plate heat exchanger according to claim 7.
  • connection plate during the brazing together of the plate heat exchanger the said connection plate is fixed in relation to the end plate in a plane parallel with the end plate by means of a guiding member extending in the said connection channel.
  • connection plate is fixed in relation to the end plate without need for the connection plate to be subjected to machining or joining processes, which may lead to the connection plate becoming deformed.
  • connection plate may be put against the end plate before the brazing operation with a brazing material arranged between the connection plate and the end plate.
  • a sleeve is used as said guiding member, the sleeve being arranged such that it extends in the said connection channel and abuts against the surface delimiting the connection channel.
  • the sleeve is brazed around its periphery together with at least one of the end plate and the connection plate. the sleeve besides having a guiding function during the brazing together of the plate heat exchanger also getting a sealing function in the finished plate heat exchanger.
  • connection plate has one side closest to the end plate, on which it may be provided with a ring-shaped recess in direct connection with its through hole, and the said sleeve at its one end may be provided with an outer flange.
  • the sleeve is placed in the opening of the end plate such that the flange will rest against the end plate, after which the connection plate is positioned, the outer edge portion of the flange of the sleeve being used for guiding of the connection plate by matching or fitting into the recess of the connection plate.
  • the connection plate hereby will be placed in the desired position in relation to the end plate.
  • the sleeve may be formed in one piece with said end plate. This considerably facilitates the positioning of the connection plate on the end plate, since no separate sleeves have to be arranged in the connection channel.
  • the invention also concerns a plate heat exchanger for heat exchange between two heat exchange fluids.
  • This plate heat exchanger comprises heat transfer plates. which are provided with so called port holes and are permanently joined to a plate package through brazing, the port holes forming port channels through the plate package, an end plate, which is permanently connected with an outer heat transfer plate in the plate package and provided with at least one opening communicating with one of the said port channels. and a connection plate, which is connected with the end plate by a permanent connection and which is intended for the connection of the plate heat exchanger to a conduit forming an inlet or outlet for one of the heat exchange fluids.
  • the connection plate is provided with a through hole and this hole and the opening in the end plate form respective parts of a connection channel.
  • the plate heat exchanger according to the invention is characterized in that a sleeve extends in the said connection channel and around its periphery is fluid-tightly connected with at least one of the end plate and the connection plate.
  • the sleeve extends through both parts of the connection channel.
  • the sleeve may be formed in one piece with the end plate around its said opening, the sleeve preferably being brazed together with the connection plate.
  • the end plate is provided with two openings, which communicate with a respective of the said port channels, and the connection plate is provided with two through holes, the openings and the through holes forming parts of two connection channels, in each of which there extends one sleeve, which is fluid-tightly connected with at least one of the end plate and the connection plate.
  • the aforementioned permanent connection is constituted by a brazing joint between the end plate and the connection plate.
  • the heat transfer plates in a plate heat exchanger are thin and therefore sensitive to loads, to which they are subjected. Particularly dangerous are changing loads, which can give rise to fatigue failure.
  • An end plate may have several different forms. It may either be of the same kind as the heat transfer plates or of a different kind. For example, it may be thicker than the heat transfer plates and cover the entire or only parts of the outermost heat transfer plate in the plate package.
  • the connection plate is usually considerably thicker than the remaining plates of a plate heat exchanger.
  • connection plate When the connection plate is brazed together with a relatively thick end plate, these plates form together a large body, the temperature movements of which will be much slower than the temperature movements of the thin heat transfer plates.
  • a plate heat exchanger which is used intermittently, is subjected to different temperatures, and at least the outer heat transfer plate in the plate package will be subjected to changing loads, which can lead to fatigue failure.
  • a similar problem arises when the end plate is of the same kind as the heat transfer plates. In this case the connection plate forms a large body, the temperature movements of which are considerably slower than those of the end plate, and the end plate will be subjected to changing loads with fatigue failure as a result.
  • a ring-shaped element which extends around the connection channel, is permanently connected with the end plate and with the connection plate to form a considerable part of the permanent connection between the end plate and the connection plate.
  • there is no widespread brazing joint between the end plate and the connection plate since the connection is mainly accomplished via the ring-shaped element.
  • the end plate and the connection plate constitute separate bodies, the different plates in the plate heat exchanger being able to move in relation to each other to much a larger extent than otherwise, without being subjected to large loads.
  • the ring-shaped element is formed in one piece with the sleeve.
  • connection plate on its one side closest to the end plate, may be provided with a ring-shaped recess around its through hole, in which the said ring-shaped element is arranged.
  • the end plate on its one side closest to the connection plate may be provided with a ring-shaped recess around the opening, in which recess the ring-shaped element is arranged.
  • the ring-shaped recess in the connection plate is made in direct connection with the through hole.
  • a ring-shaped element is used, which is formed in one piece with the sleeve.
  • connection plate may be arranged at a distance from the end plate.
  • connection plate may abut against the end plate, the connection plate on its side closest to the end plate being provided with a ring-shaped groove around and at a distance from the through hole.
  • a brazing material has been placed between the connection plate and the end plate in connection with the ring-shaped element, before the brazing together. During the brazing operation the brazing material melts and spreads due to capillary effects between the abutting surfaces of the connection plate, the end plate, the ring-shaped element and the sleeve.
  • connection plate and the end plate form substantially separate thermal bodies, irrespective of the two plates abutting against each other or not.
  • the sleeve extends axially through only a limited part of the through hole in the connection plate.
  • the connection plate may be provided with a thread in the through hole.
  • a sleeve is used.
  • the ring-shaped element being formed in one piece with the sleeve at one end thereof.
  • the sleeve is arranged in the plate heat exchanger such that it extends in the opening in the end plate, the ring-shaped element abutting with one side against the end plate and with an outer end portion against the connection plate in a ring-shaped recess as above.
  • the diameter of the through hole in the connection plate may be chosen according to need without the sleeve and the opening in the end plate having to be changed.
  • the ring-shaped element is provided with a groove for receiving a brazing material.
  • a ring of brazing material is arranged in the groove. Accordingly, the brazing material will be arranged such that it can easily spread around the ring-shaped element during the brazing of the plate heat exchanger for connecting the ring-shaped element with adjacent plates and creating fluid-tight joints between the sleeve and these plates.
  • Fig. 1 shows a known plate heat exchanger 1 comprising a stack of heat transfer plates 2 brazed together to a plate package. Onto the outer heat transfer plates of the plate package, end plates 3. 4 have been brazed, which are thicker than the heat transfer plates 2. One of the end plates 4 is provided with four holes, around which connection devices in the form of pipe sockets 5, 6. 7 and 8 are brazed.
  • Fig. 2 shows a section along the line II-II in fig. 1.
  • Each heat transfer plate 2 is provided with four port holes, two of which are designated 9 and 10 in fig. 2.
  • the heat transfer plates 2 abut against each other in pairs around the port holes such that four port channels are formed through the plate heat exchanger 1.
  • Fig. 2 shows two port channels 11 and 12, respectively.
  • the heat transfer plates 2 are further provided with a pressing pattern of depressions and elevations 13. Thereby, passages 14 for heat exchange fluids are formed between the heat transfer plates 2.
  • the present invention is applicable on plate heat exchangers comprising connection devices in the form of connection plates.
  • One such plate heat exchanger 15 is shown in fig. 3.
  • the plate heat exchanger 15 comprises an end plate 16, onto which two connection plates 17, 18 have been brazed.
  • Each of the connection plates 17, 18 is provided with two through holes 19, 20 and 21, 22, respectively, which are arranged opposite to openings in the end plate 16 and together with these form four connection channels.
  • the connection plates 17. 18 are further provided with a number of holes 23, which suitably are provided with internal threads and which are intended for connecting the plate heat exchanger 15 with conduits, which conduct heat exchange fluids to and from the same.
  • Fig. 4 illustrates previously known technology and shows a section along the line IV-IV in fig. 3 of the end plate 16 and the connection plate 17.
  • this connection plate 17 has been fixed in relation to the end plate 16 by spot welding, i.e. in a hitherto common manner.
  • This form of fixing has caused an unevenness 24 in the connection plate 17. which may create sealing problems when conduits are to be connected to the finished plate heat exchanger.
  • fig. 4 reveals that it may be difficult to position the through holes 19, 20 in the connection plate 17 opposite to the openings 25, 26 in the end plate 16.
  • the known technology it can also be a problem to obtain a tight brazing joint 27 between the end plate 16 and the connection plate 17.
  • Fig. 5 illustrates the present invention and shows a section of the end plate 16 and the connection plate 18 along the line V-V in fig.3.
  • special guiding members are used for fixing the connection plate 18 in relation to the end plate 16 during the brazing together of the plate heat exchanger.
  • guiding members in the shape of sleeves 30, 31 have been inserted and by means of a tool been expanded or flared in their ends as shown in fig. 5, this having been made before assembling of the parts of the plate heat exchanger.
  • collars 32, 33 have been formed at one ends of the sleeves, and despite the collars 32, 33 protruding outside the end plate, they will not get into contact with the outermost heat transfer plate of the plate package.
  • the sleeves 30. 31 fix the connection plate 18 in relation to the end plate 16 during the brazing together of the plate heat exchanger 15 without the connection plate 18 having to be subjected to operations, causing it to deform. Further, the sleeves 30, 31 get a sealing function when they are brazed in the connection channels.
  • a relatively thick ring-shaped piece of brazing material may be placed against each of the sleeves 30, 31 in their respective connection channels. This piece of brazing material is placed against the end surface of the sleeve and will melt and fill the space between the sleeve and both the connection plate 18 and the end plate 16 during the brazing process, which means that no leakage can arise between the connection plate 18 and the end plate 16 in the finished plate heat exchanger.
  • Fig. 6 shows a section corresponding to the section in fig. 5 through an end plate 16 and a connection plate 18 according to another embodiment of the invention.
  • the guiding members are constituted by sleeves 30. 31 formed in one piece with the end plate 16 around the openings therein.
  • this embodiment has the advantage that no separate sleeves have to be inserted into the connection channels.
  • Fig. 7 shows a section corresponding to the section in fig. 5 through an end plate 16 and a connection plate 18 according to a further embodiment of the invention.
  • each sleeve 30, 31 at its one end is provided with a ring-shaped element in the form of an outer flange 34, 35, which is provided with a ring-shaped groove 36, 37 for receiving a brazing material.
  • the connection plate 18 is provided with ring-shaped recesses 38, 39 in direct connection with the through holes 21, 22.
  • the flanges 34, 35 of the sleeves abut against the end plate 16 and with their outer edge portions against the connection plate 18 in its recesses 38, 39 for fixation of the connection plate 18 in relation to the end plate 16 during brazing of the plate heat exchanger.
  • brazing material in the groove 36, 37 of the flange 34, 35 of the sleeve melts and spreads between the sleeve 30, 31 and the connection plate 18, and between the sleeve 30, 31 and the end plate 16.
  • a brazing material may also be arranged between the connection plate 18 and the end plate 16. Also this brazing material melts during the brazing operation and spreads between these two plates 16, 18.
  • this embodiment also has a large flexibility concerning the forming of the through holes 21, 22 in the connection plate 18. Since the flanges 34, 35 of the sleeves abut against the connection plate in its recesses 38, 39, instead of the sleeves abutting against the connection plate in its through hole. a single kind of sleeves may be used and the openings of the end plates may have one and the same size for plate heat exchangers of a certain size, irrespective of which diameter is chosen for the through holes in the connection plate for a specific plate heat exchanger. Further, the connection plates may be provided with threads in their through holes, since no sleeves extend in these through holes.
  • the flanges 34, 35 of the sleeves 30, 31 are shaped such that they, besides constituting a guide for the connection plate 18 during the brazing together of the plate heat exchanger, also constitute spacing members between the connection plate 18 and the end plate 16.
  • a brazing material is placed in the groove 36, 37 in the flange 34, 35 of each sleeve and a ring of brazing material is placed between the respective flanges 34, 35 and the end plate 16 at 40 and 41.
  • connection plate 18 is permanently connected with the end plate 16 by means of the ring-shaped elements constituted by the sleeve flanges 34. 35.
  • connection plate 18 is formed with ring-shaped grooves 42, 43 around and at a distance from its through holes 21, 22.
  • a ring of brazing material is placed between the connection plate 18 and the flange 34, 35 of the respective sleeve 30. 31 at 44 and 45, and between the flange 34, 35 of the respective sleeve and the end plate 16 at 40 and 41.
  • No brazing material is arranged in any other place between the connection plate 18 and the end plate 16.
  • the rings of brazing material melt and this material spreads due to capillary effects between the end plate, the respective sleeves. the connection plate and the respective sleeve flanges.
  • connection plate 18 and the end plate 16 will also spread between the connection plate 18 and the end plate 16, no further though than to the grooves 42, 43 in the connection plate. At these grooves the distance between the connection plate 18 and end plate 16 is too great, namely for capillary effects to arise. Thus, a considerable part of the permanent joint between the connection plate 18 and the end plate 16 is created by the flanges 34, 35 of the sleeves.
  • connection plate 18 and the end plate 16. respectively, constitute separate thermal bodies, which independent of each other may expand and contract as a result of temperature changes.
  • An end plate is permanently joined with an outer heat transfer plate in the respective plate package. Since the end plate 16 constitutes a separate thermal body, the end plate 16 may change temperature much faster than if it formed a thermal body together with the connection plate 18. Accordingly, the loads on the outer heat transfer plate in the plate package will become smaller. To the extent that the temperature movements of the end plate 16 and the outer heat transfer plate differ, the end plate 16 will not create a resistance as big as if the end plate 16 would be brazed together with the connection plate 18. Also this reduces the loads on the outer heat transfer plate in the plate package.
  • the outer heat transfer plates in plate heat exchangers having end plates and connection plates according to the embodiments in figs. 8 and 9 run a smaller risk of fatigue failure than the outer heat transfer plates in the embodiments according to figs. 5-7.
  • Fig. 10 shows an embodiment of the invention, in which a separate ring-shaped element 46 is arranged between the connection plate 18 and the end plate 16.
  • the ring-shaped element 46 extends around a sleeve 30, which extends in a connection channel 47, of which the through hole 21 in the connection plate 18 and the opening 28 in the end plate 16 form parts.
  • the connection plate 18 and the end plate 16 are permanently connected with each other via the ring-shaped element 46.
  • the sleeve 30 has a fixing and a sealing function.
  • the embodiment according to fig. 11 is similar to the embodiment according to fig. 6.
  • the sleeve 30 is formed in one piece with the end plate 16.
  • the end plate 16 is permanently joined with the connection plate 18 via a separate ring-shaped element 46, which extends around the sleeve 30.
  • Fig. 13 shows an embodiment of the invention, in which the connection plate 18 is provided with a ring-shaped recess 49 around and at a distance from its through hole 21.
  • the sleeve 30 has a flange 34, which is provided with an axially protruding ring-shaped projection 50.
  • the projection 50 of the flange abuts against the connection plate 18 in its ring-shaped recess 49 for fixing of the connection plate 18 in relation to the end plate 16 during the brazing together of the plate heat exchanger.
  • the connection plate 18 is permanently connected with the end plate 16 via the flange 34 of the sleeve.
  • Fig. 14 shows an embodiment of the invention, which is similar to the embodiment according to fig. 6.
  • the connection plate 18 is provided with a groove 42 around and at a distance from its through hole 21.
  • a ring of brazing material is placed between the connection plate 18 and the end plate 16. only around the sleeve 30.
  • the brazing material melts and spreads between the sleeve 30 and the connection plate 18, and between the connection plate 18 and the end plate 16; however, no further than to the groove 42.
  • the connection plate 18 and the end plate 16 constitute separate thermal bodies.
  • a guiding member may for example be constituted by a number of pins distributed along the periphery of a connection channel. Further. in embodiments with sleeves formed in one piece with the end plate, such sleeves may abut against the connection plates in recesses around their through holes. A further possibility is to form the connection plate with sleeves, which fit into the openings in the end plate.
  • a connection plate does not have to have exactly two through holes but may instead have only one hole or more than two through holes.
  • not all of the connection plates have to be brazed together with one of two end plates of the plate heat exchanger. Some of the connection plates may instead be brazed together with the other one of the end plates.
  • an end plate may be constituted by two separate parts, one part opposite to each pair of port channels. Alternatively, an end plate may be of the same kind as the heat transfer plates in the plate heat exchanger.
  • Brazing material which is arranged between different parts of the plate heat exchanger before these are brazed together. is normally constituted by a thin foil. However, another possibility is that the parts included in the plate heat exchanger are plated with brazing material.

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

Claims (23)

  1. Procédé de production d'un échangeur à plaques brasées qui est prévu pour un échange de chaleur entre deux fluides d'échange de chaleur et qui comprend:
    des plaques de transfert de chaleur dotées d'orifices d'accès,
    une plaque d'extrémité (16) dotée d'au moins une ouverture (28, 29) et
    une plaque de liaison (18) qui est traversée par un trou (21, 22) et qui est adaptée pour former une liaison entre l'échangeur de chaleur à plaques et un conduit adapté pour conduire l'un desdits fluides d'échange de chaleur vers l'échangeur de chaleur à plaques ou depuis celui-ci, laquelle liaison doit être formée directement entre ladite plaque de liaison (18) et ledit conduit après que l'échangeur de chaleur à plaques brasées a été produit,
    procédé dans lequel :
    lesdites plaques de transfert de chaleur sont empilées pour former un empilement de plaques, un matériau de brasage étant agencé entre les plaques de transfert de chaleur de telle sorte que les orifices d'accès forment des canaux d'accès qui traversent l'empilement de plaques,
    ladite plaque d'extrémité (16) est placée contre une plaque extérieure de transfert de chaleur de l'empilement de plaques, un matériau de brasage étant agencé entre la plaque d'extrémité (16) et la plaque extérieure de transfert de chaleur, de telle sorte que ladite ouverture (28, 29) ménagée dans la plaque d'extrémité (16) communique avec l'un desdits canaux d'accès,
    ladite plaque de liaison (18) est placée de telle sorte que ledit trou (21, 22) qui traverse la plaque de liaison (18) et ladite ouverture (28, 29) ménagée dans la plaque d'extrémité (16) forment des parties respectives d'un canal de liaison et
    ledit empilement de plaques, ladite plaque d'extrémité (16; 34) et ladite plaque de liaison (18; 35) sont brasées ensemble à l'aide d'un matériau de brasage,
    caractérisé en ce que pendant le brasage de l'échangeur de chaleur à plaques, ladite plaque de liaison (18) est fixée par rapport à la plaque d'extrémité (16) dans un plan parallèle à celui de la plaque d'extrémité (16) au moyen d'un élément de guidage qui s'étend dans ledit canal de liaison.
  2. Procédé de production d'un échangeur de chaleur à plaques selon la revendication 1, dans lequel, avant ledit brasage, la plaque de liaison est placée contre la plaque d'extrémité (16) avec un matériau de brasage agencé entre la plaque de liaison (18) et la plaque d'extrémité (16).
  3. Procédé de production d'un échangeur de chaleur à plaques selon les revendications 1 ou 2, dans lequel un manchon (30, 31) est utilisé comme dit élément de guidage et est agencé de manière à s'étendre dans ledit canal de liaison, le manchon (30, 31) venant buter contre la surface qui délimite le canal de liaison.
  4. Procédé de production d'un échangeur de chaleur à plaques selon la revendication 3, dans lequel ledit manchon (30, 31) est brasé sur son pourtour sur au moins l'une parmi ladite plaque d'extrémité (16) et ladite plaque de liaison (18).
  5. Procédé de production d'un échangeur de chaleur à plaques selon l'une quelconque des revendications 3 et 4, dans lequel un côté de ladite plaque de liaison (18) dudit échangeur de chaleur à plaques qui est situé près de ladite plaque d'extrémité (16) est doté d'un creux (38, 39) de forme annulaire directement associé à ladite perforation (21, 22), ledit manchon (30, 31) étant doté à l'une de ses extrémités d'une bride extérieure (34, 35), et dans lequel, avant l'opération de brasage, le manchon (30, 31) est placé dans ladite ouverture (28, 29) de la plaque d'extrémité (16) de telle sorte que la bride (34, 35) repose contre la plaque d'extrémité (16), après quoi la plaque de liaison (18) est placée et la partie de bord extérieur de la bride (34, 35) du manchon est utilisée pour guider la plaque de liaison (18) en s'ajustant dans ledit creux (38, 39) de la plaque de liaison.
  6. Procédé de production d'un échangeur de chaleur à plaques selon les revendications 3 ou 4, dans lequel ledit manchon (30, 31) est formé d'un seul tenant avec ladite plaque d'extrémité (16).
  7. Echangeur de chaleur à plaques brasées qui est prévu pour l'échange de chaleur entre deux fluides d'échange de chaleur et qui comprend:
    des plaques d'échange de chaleur qui sont dotées d'orifices dits d'accès et qui sont reliés de manière permanente à un empilement de plaques par brasage, les orifices d'accès formant des canaux d'accès qui traversent l'empilement de plaques,
    une plaque d'extrémité (16) qui est reliée de manière permanente à la plaque d'extérieure de transfert de chaleur dudit empilement de plaques et qui est dotée d'au moins une ouverture (28, 29) qui communique avec l'un desdits canaux d'accès, et
    une plaque de liaison (18) qui est reliée de manière permanente à ladite plaque d'extrémité (16) par une liaison permanente et qui est adaptée pour former une liaison entre l'échangeur de chaleur à plaques et un conduit adapté pour conduire l'un desdits fluides d'échange de chaleur vers ou depuis l'échangeur de chaleur à plaques, cette liaison devant être formée directement entre ladite plaque de liaison (18) et ladite conduit après que l'échangeur de chaleur à plaques brasées a été produit, la plaque de liaison (18) étant traversée par un trou (21, 22) et ce trou (21, 22) et ladite ouverture (28, 29) de la plaque d'extrémité (16) formant des parties respectives d'un canal de liaison,
    caractérisé en ce qu'un manchon (30, 31) s'étend dans ledit canal de liaison entre la plaque de liaison et la plaque d'extrémité, son pourtour étant relié de manière étanche aux fluides à au moins l'une parmi ladite plaque d'extrémité (16) et ladite plaque de liaison (18).
  8. Echangeur de chaleur à plaques selon la revendication 7, dans lequel ledit manchon (30, 31 ) s'étend dans les deux dites parties du canal de liaison.
  9. Echangeur de chaleur à plaques selon l'une quelconque des revendications 7 et 8, dans lequel ledit manchon (30, 31) est formé d'un seul tenant avec ladite plaque d'extrémité (16) autour de ladite ouverture (28, 29) de cette dernière.
  10. Echangeur de chaleur à plaques selon la revendication 9, dans lequel ledit manchon (30, 31 ) est brasé en même temps que ladite plaque de liaison (16).
  11. Echangeur de chaleur à plaques selon l'une quelconque des revendications 7 à 9, dans lequel ladite plaque d'extrémité (16) est dotée de deux ouvertures (28, 29) qui communiquent avec l'un desdites canaux d'accès, ladite plaque de liaison (18) étant traversée par deux trous (21, 22), les ouvertures (28, 29) et les trous (21, 22) formant des parties de deux canaux de liaison dans chacun desquels s'étend un manchon (30, 31) relié de manière étanche aux fluides à au moins l'une parmi la plaque d'extrémité (16) et la plaque de liaison (18).
  12. Echangeur de chaleur à plaques selon l'une quelconque des revendications 7 à 11, dans lequel ladite liaison permanente est constituée par un raccord brasé entre ladite plaque d'extrémité (16) et ladite plaque de liaison (18).
  13. Echangeur de chaleur à plaques selon la revendication 7, dans lequel un élément (34, 35; 46) de forme annulaire qui s'étend autour dudit canal de liaison est relié de manière permanente à ladite plaque d'extrémité (16) et à ladite plaque de liaison (18) pour former une partie importante de la liaison permanente entre la plaque d'extrémité (16) et la plaque de liaison (18).
  14. Echangeur de chaleur à plaques selon la revendication 13, dans lequel ledit élément (34, 35) de forme annulaire est réalisé d'un seul tenant avec ledit manchon (30, 31).
  15. Echangeur de chaleur à plaques selon l'une quelconque des revendications 13 et 14, dans lequel un côté de ladite plaque de liaison (18) est proche de ladite plaque d'extrémité (16), la plaque de liaison (18) étant dotée sur ce côté d'un creux (38, 39; 49) de forme annulaire qui entoure ledit trou (21, 22) qui la traverse et dans lequel est agencé ledit élément (34, 35; 46) de forme annulaire.
  16. Echangeur de chaleur à plaques selon l'une quelconque des revendications 13 à 15, dans lequel un côté de ladite plaque d'extrémité (16) est proche de ladite plaque de liaison (18), la plaque d'extrémité (16) étant dotée sur ce côté d'un creux (48) de forme annulaire qui entoure ladite ouverture, ledit élément (34, 35; 46) de forme annulaire étant agencé dans ce creux.
  17. Echangeur de chaleur à plaques selon la revendication 15, dans lequel ledit creux (38, 39) de forme annulaire de ladite plaque de liaison (18) est formé en liaison directe avec ledit trou (30, 31).
  18. Echangeur de chaleur à plaques selon l'une quelconque des revendications 13 à 17, dans lequel ladite plaque de liaison (18) est agencée à distance de ladite plaque d'extrémité (16).
  19. Echangeur de chaleur à plaques selon l'une quelconque des revendications 13 à 17, dans lequel ladite plaque de liaison (18) vient buter contre ladite plaque d'extrémité (16) et dans lequel la plaque de liaison (18) est dotée sur son côté le plus proche de la plaque d'extrémité (16) d'une rainure (42, 43) de forme annulaire qui entoure ledit trou (21, 22) à distance de ce dernier.
  20. Echangeur à plaque selon l'une quelconque des revendications 7 à 14, dans lequel ledit manchon (30, 31) s'étend axialement à travers seule une partie limitée dudit trou (21, 22) qui traverse la plaque de liaison (18).
  21. Echangeur de chaleur à plaques selon la revendication 14, dans lequel ledit élément (34, 35; 46) de forme annulaire est doté d'une rainure (36, 37) de réception d'un matériau de brasage.
  22. Echangeur de chaleur à plaques selon l'une quelconque des revendications 7 à 21, dans lequel ladite plaque de liaison (18) présente un trou (23) doté d'un filet intérieur et adapté pour relier l'échangeur de chaleur à plaques audit conduit destiné à amener ou décharger l'un desdits fluides d'échange de chaleur.
  23. Echangeur de chaleur à plaques selon l'une quelconque des revendications 7 à 21, dans lequel ladite plaque de liaison (18) présente dans ledit trou (21, 22) un filet intérieur adapté pour réaliser ladite liaison entre l'échangeur de chaleur à plaques et ledit conduit destiné à amener ou décharger l'un desdits fluides d'échange de chaleur.
EP19990931659 1998-06-16 1999-06-03 Echangeur thermique a plaques et son procede de fabrication Expired - Lifetime EP1087851B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE9802175A SE9802175D0 (sv) 1998-06-16 1998-06-16 Ett förfarande för att framställa en plattvärmeväxlare; samt en plattvärmeväxlare
SE9802175 1998-06-16
SE9804177 1998-12-01
SE9804177A SE513540C2 (sv) 1998-06-16 1998-12-01 Ett förfarande för att framställa en plattvärmeväxlare samt en plattvärmeväxlare
PCT/SE1999/000960 WO2000000310A1 (fr) 1998-06-16 1999-06-03 Echangeur thermique a plaques et son procede de fabrication

Publications (2)

Publication Number Publication Date
EP1087851A1 EP1087851A1 (fr) 2001-04-04
EP1087851B1 true EP1087851B1 (fr) 2004-08-18

Family

ID=26663329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990931659 Expired - Lifetime EP1087851B1 (fr) 1998-06-16 1999-06-03 Echangeur thermique a plaques et son procede de fabrication

Country Status (6)

Country Link
EP (1) EP1087851B1 (fr)
AT (1) ATE273762T1 (fr)
AU (1) AU4810299A (fr)
DE (1) DE69919540T2 (fr)
SE (1) SE513540C2 (fr)
WO (1) WO2000000310A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1645828B1 (fr) * 2004-10-11 2016-08-10 MAHLE Behr GmbH & Co. KG Échangeur de chaleur à plaques empilées
WO2011117988A1 (fr) * 2010-03-25 2011-09-29 三菱電機株式会社 Échangeur thermique à plaques, procédé de fabrication d'un échangeur thermique à plaques, et appareil de pompe à chaleur
SI2853333T1 (sl) * 2013-09-26 2019-12-31 Alfa Laval Corporate Ab Postopek spajanja kovinskih delov z uporabo plasti za znižanje tališča
EP2853332A1 (fr) 2013-09-26 2015-04-01 Alfa Laval Corporate AB Nouveau concept de brasage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8501599D0 (sv) * 1985-04-01 1985-04-01 Torell Ab Anordning vid en plattvermevexlare
DE19713883A1 (de) * 1997-04-04 1998-10-08 Knecht Filterwerke Gmbh Lagerung eines Wärmetauschers

Also Published As

Publication number Publication date
AU4810299A (en) 2000-01-17
WO2000000310A1 (fr) 2000-01-06
EP1087851A1 (fr) 2001-04-04
DE69919540T2 (de) 2004-12-30
SE513540C2 (sv) 2000-09-25
DE69919540D1 (de) 2004-09-23
ATE273762T1 (de) 2004-09-15
SE9804177D0 (sv) 1998-12-01
SE9804177L (sv) 1999-12-17

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