EP0623798B2 - Plate heat exchanger, especially oil cooler - Google Patents

Plate heat exchanger, especially oil cooler Download PDF

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Publication number
EP0623798B2
EP0623798B2 EP94107014A EP94107014A EP0623798B2 EP 0623798 B2 EP0623798 B2 EP 0623798B2 EP 94107014 A EP94107014 A EP 94107014A EP 94107014 A EP94107014 A EP 94107014A EP 0623798 B2 EP0623798 B2 EP 0623798B2
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EP
European Patent Office
Prior art keywords
plate
heat exchanger
openings
fluid
heat exchanging
Prior art date
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EP94107014A
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German (de)
French (fr)
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EP0623798B1 (en
EP0623798A2 (en
EP0623798A3 (en
Inventor
Andreas Dipl.-Ing. Baumann
Andreas Dipl.-Ing. Grüner
Gerd Schleier
Gebhard Schwarz
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Mahle Behr GmbH and Co KG
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Behr GmbH and Co KG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • 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
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0089—Oil coolers

Definitions

  • the invention relates to a plate heat exchanger, in particular an oil / coolant cooler for internal combustion engines according to the preamble of patent claim 1.
  • EP-B1-258,236 It is from the EP-B1-258,236 known to provide the plates of a plate heat exchanger with circumferential edges, which interlock at several stacked plates so that they can be soldered tight by a soldering process. It is also known, a plate heat exchanger to supply two fluids, a working and a cooling medium, in each case via two connecting pieces, wherein after the above EP-B1-258,236 the outer plate, to which the connecting pieces are fastened, is stabilized by a support plate.
  • the invention is therefore the object of a plate heat exchanger of the type mentioned in such a way that the number of common parts used increases, or the number of parts used is reduced overall.
  • a plate heat exchanger with the features of claim 1 is proposed in which turbulence inserts are arranged in the heat exchanger plates.
  • the proposed in claim 1 embodiment reduces the number of heat exchanger plates used, so that all plates can be manufactured with the same tool.
  • a special housing for the plate heat exchanger is not needed, since the peripheral edges of the heat exchanger plates are joined by joining technology, for example, soldered, and thus form a housing-like outer shell of the plate heat exchanger. From this construction results as a further distribution that leakage at the joints leads only to a discharge of a fluid, but mixing of the fluids is excluded.
  • the design of the gap between two stacked heat exchanger plates by the use of different turbulence inserts is varied.
  • the plate heat exchanger can be very easily adapted to different fluids or different uses (eg low pressure loss or high heat exchange performance).
  • the heat exchanger plates, the turbulence inserts and all other attachments can be made of the same material, whereby a recycling of the heat exchanger is very easy.
  • individual components can also be made of different materials, whereby adaptation to special applications is greatly facilitated.
  • turbulence-generating elevations are embossed in the heat exchanger plate. This embodiment avoids the insertion of a single turbulence insert and significantly reduces the number of parts used.
  • the heat exchanger plates can be combined by the U-shaped design of the characteristics with heat exchanger plates that still need sealing washers.
  • the plate heat exchanger is provided with a closure plate having two openings corresponding to two corresponding openings in the heat exchanger plates.
  • the supply and discharge of a fluid from the top and that of the other fluid from the bottom can be carried out.
  • the plate heat exchanger is provided at the bottom with connecting pieces, which have a smooth shaft with an incorporated groove into which a sealing ring is inserted.
  • Such a plate heat exchanger can be connected by simple plug-in assembly to the oil circuit of a motor or gearbox. The attachment to a motor or gearbox takes place by suitable means.
  • a special mounting plate is provided on the plate heat exchanger, which can be produced inexpensively according to customer requirements.
  • the end plate already has the end plate formations and openings for attachment of the plate heat exchanger to another body.
  • a special mounting plate is thereby superfluous.
  • the formations and openings of the end plate are manufactured according to the respective customer requirements.
  • the end plate is designed customer-specific for plate heat exchangers of the same power.
  • the end plate is designed as a deep-drawn sheet metal part.
  • the openings that must be introduced into the end plate can be stamped in a deep-drawn sheet metal part, so that a complex, machining production is not necessary.
  • an insert and a cover plate is inserted between the end plate and the adjacent heat exchanger plate.
  • the cover plate covers at least one opening of the heat exchanger plate fluid-tight, so that a deflection of the fluid is ensured within the space between two heat exchanger plates.
  • the cover plate openings which allow a connection of the fluid channels of the plate heat exchanger to the connection piece.
  • the connecting pieces for example, an embodiment with a smooth shaft, are inserted into the end plate of the plate heat exchanger and connected by joining technology with the end plate.
  • an insert is inserted between the cover plate and the end plate.
  • This Einlegteil directs the fluid flowing through to the fluid-carrying channels of the plate heat exchanger, or to the connection piece in the end plate.
  • the fluid flow can be passed to any arranged connecting piece in the end plate, so that the connecting pieces the fluid channels of the plate heat exchanger need not be opposite.
  • a customized configuration of the plate heat exchanger is facilitated because the geometric conditions at the installation site can be easily taken into account.
  • the insert is fluid-tight and mechanically stable with the cover plate and the end plate by joining technology, in particular soldered.
  • Fig. 1 shows an exploded view of a cut plate heat exchanger not according to the invention 1.
  • the sealing discs 5 are usually made of a metallic material, but they can also be made of plastic or ceramic. They have the same thickness d as the turbulence inserts 4, 4 'and are inserted in openings 15, 15' of the turbulence inserts 4, 4 ', the inner diameter of the openings 15, 15' corresponding to the outer diameter of the sealing disks 5.
  • the turbulence inserts 4, 4 ' are inserted into the trough-shaped heat exchanger plates 3 such that the sealing disks 5 come to lie alternately over the openings 12 and 12', the openings of the sealing disks 5 corresponding to the openings 12, 12 '.
  • the sealing discs 5 seal the openings 12 and 12 'relative to the space between the heat exchanger plates 3 and the turbulence insert 4, 4' therein, so that passageways are formed through which passes the corresponding fluid in the next adjacent space.
  • the oil / coolant cooler shown here, there is an alternating filling of the intermediate spaces with coolant, oil, sensor means, etc.
  • the distribution of the fluid in the intermediate spaces is due to the pressure with which the fluids are pressed into the plate heat exchanger 1, wherein the individual Gaps cause a certain throttling of the fluid flows through the interstices.
  • the uniform distribution of the fluids in the interstices can be controlled by the design of the turbulence inserts 4, 4 '.
  • the supply and discharge lines for the fluids can be arranged in a row (shown here) or diagonally opposite (cross flow).
  • the coolant is via connections 9 zu,. derived (only one port shown).
  • the terminals 9 are mounted on a terminal plate 2. They are continuous to the openings 12 'of the heat exchanger plates 3 and the openings 14 of the turbulence inserts 4.
  • Each gap oil is sealed by means of the sealing rings 5 against the coolant flow, so that the coolant is passed through in the next space KM.
  • the lowermost heat exchanger plate 3 of the plate heat exchanger 1 is sealed by means of a closure plate 6, so that the coolant is deflected in the plate heat exchanger 1 and 9 flows through the second port again.
  • the supply and discharge of the oil could also be done by means of connections to the connection plate 2.
  • the oil ports 8, however, the coolant ports 9 are arranged obliquely opposite.
  • openings 13 are provided in the connection plate 6, which correspond to the openings 12 of the heat exchanger plates 3, while the connection plate 2 closes the openings 12 of the uppermost heat exchanger plate 3 tightly.
  • the oil is introduced upper connecting piece 8, which are inserted into the terminal plate 6 and fixedly connected thereto.
  • the oil is introduced through the ports 8 and the openings 13 and 12 through a gap KM in the first space oil, the gap KM is completed by sealing discs 5 against the flow of oil.
  • a portion of the oil flow is distributed in the space oil, thereby deflected and flows through the second port 8 from.
  • the oil via the walls of the heat exchanger plate 3 and the turbulence inserts 4 its heat to the coolant in the adjacent spaces KM from.
  • the remaining oil flow is through the next gap KM, which in turn is sealed by sealing discs 5 against the flow of oil, forwarded in the following space oil.
  • the number of heat exchanger plates 3 is chosen so that the required heat exchange performance of the heat exchanger 1 is achieved, it may therefore differ from the example explained here.
  • the connecting pieces 8 have a smooth shaft 10, in which an annular groove 11 is incorporated.
  • the groove 11 serves to receive an O-ring seal.
  • the plate heat exchanger 1 can be mounted by plug-in mounting on, for example, an engine block.
  • holes 16 are provided in the end plate, by means of which the plate heat exchanger 1 can be screwed to stud bolts for example.
  • the adaptation of the fasteners to specific customer requirements is carried out with the help of an individual mounting plate 7, which is provided in the representation as a cranked plate.
  • the mounting plate 7 can be mounted in addition to the end plate 6, for example, subsequently, or alone on the plate heat exchanger 1, wherein it takes over the function of the end plate 6 in the second case.
  • the stacked heat exchanger plates 3 are joining technically connected to each other at their adjacent peripheral edges, eg soldered or glued, in this case, the inserted sealing discs 5 and the turbulence inserts 4, 4 'are connected. Due to the large number of compounds (eg heat exchanger plates 3 with the turbulence inserts 4, 4 '), the heat exchanger 1 is very stable, since the compounds act in the interstices as tie rods.
  • Fig.2 shows a variant of the heat exchanger plates 3 Fig. 1 in a design corresponding to claim 1. Also in this embodiment of the heat exchanger plates 23 all heat exchanger plates 23 of a plate heat exchanger 1 are the same. However, during assembly of the heat exchanger 1, every second heat exchanger plate 23 is rotated by 180 ° about the vertical axis. Around the openings 26 of the heat exchanger plate 23 annular shapes 25 are formed, which serve to seal the opening 26 with respect to the opening 27. The height h of the forms 25 corresponds to the thickness d of the turbulence inserts 4, 4 '.
  • the head 28 of the embossments 25 is flattened to ensure good contact with the adjacent heat exchanger plate 23, so that the cross section of the embossment 25 has a "U" profile which is greatly flattened at the base of the "U”.
  • a turbulence insert 4 or 4 ' (for coolant or for oil) is arranged, wherein through the larger openings 15, 15' of the turbulence inserts 4, 4 ', the forms 25 of the heat exchanger plate 23 are inserted.
  • the openings 14, 14 'of the turbulence inserts come to lie over the openings 27 and the non-pronounced side of the opening 26. Sealing washers 5 are not required in this embodiment.
  • the handling during assembly and joining of the heat exchanger 1 corresponds to that in the description FIG. 1 illustrated approach.
  • Fig. 3 shows a further variant not according to the invention in FIG. 2 illustrated heat exchanger plate shape.
  • the heat exchanger plates 33 also have annular shapes 35 around the openings 36.
  • turbulence-generating elevations 39 for example, truncated conical nubs, impressed, which have the same height h as the characteristics 35.
  • the elevations 39 are used in the assembled state of the generation of turbulence, so that it can be dispensed with the introduction of additional turbulence inserts in the intermediate space (here, for example, the gap KM).
  • the heat exchanger plate 33 can with the heat exchanger plates 3 or 23 of the FIGS. 1 and 2 combined, so that find in the spaces oil turbulence inserts use, while in the spaces KM only the embossed projections 39 protrude and provide sufficient turbulence of the coolant. In this variant alternately spaces for coolant and spaces for oil are provided.
  • the mounted heat exchanger is sealed in a single operation at the peripheral edges and at the contact surfaces of the forms 35 with the adjacent heat exchanger plates 23.
  • the turbulence inserts 4, 4 'and the elevations 39 are connected to the heat exchanger plates 23, 33.
  • Fig. 4 shows a heat exchanger without separately inserted turbulence inserts 4, 4 'or sealing disks 5 according to claim 2.
  • the heat exchanger plates 43 have around the openings 46 annular shapes 45, the cross-sectional profile is approximately "U" -shaped. Between the openings 46 and 47 and in the remaining edge areas turbulence-generating elevations 49, such as frustoconical knobs, impressed, with a circular area around the openings 47 remains in an unembossed state to a secure seal with an adjacent expression 45 of the adjacent heat exchanger plate 43 guarantee.
  • the heat exchanger plates 43 are stacked without additional inserts, with each second heat exchanger plate 43 is rotated by 180 ° about the vertical axis.
  • two different heat exchanger plates 43 'and 43 "(not shown) can be used, in which the turbulence-generating elevations 49 of a heat exchanger plate 43' for use with coolant and the turbulence-generating elevations 49 a second heat exchanger plate 43" on the use tuned with oil.
  • FIGS. 5 and 6 show a plate heat exchanger with twelve heat exchanger plates 3 in the assembled state.
  • the trough-shaped heat exchanger plates 3 are stacked with each other, with their peripheral edges come to rest each other.
  • the connection plate 2 is mounted on the underside of the heat exchanger plate 3, while the end plate 6 (not visible) is arranged with the connection piece 8 and the individual mounting plate 7 on the upper side of the heat exchanger plate 3.
  • the coolant is supplied via the left connection piece 9 and distributed in the heat exchanger 1 to six spaces. After flowing through the gaps, the coolant is discharged via the right connection piece 9 again.
  • the oil flow is analog, wherein the oil supply via the right connection piece 8 and the oil removal via the left connection piece 8.
  • the oil is distributed in the heat exchanger 1 to five spaces and cooled there.
  • the heat exchanger 1 is fastened there by means of the individual fastening plate 7, for example screwed to corresponding stud bolts.
  • the coolant is supplied via coolant hoses, which are fastened in a known manner to the terminals 9.
  • FIGS. 7 and 8 show a closure plate 60, which is designed as a deep-drawn sheet metal part. It has two openings 64, 64 ', which serve to supply and discharge of a fluid. Furthermore, four formations 61 are integrally formed with the openings 62 to the end plate 60. They serve to attach the end plate to another body, such as a motor or gear block.
  • the outer edge 63 of the end plate 60 is set up, for example, by deep drawing perpendicular to the bottom surface of the end plate 60, whereby the end plate 60 and the formations 61 are stiffened in itself and a torsion-safe attachment of the end plate 60 is ensured on another body.
  • the end plate 60 is soldered to the heat exchanger plates 3 of the plate heat exchanger 1 fluid-tight.
  • Fig. 9 shows an insert 65 and a closure plate 66.
  • the insert 65 is designed as a deep-drawn sheet metal part.
  • elevations 67 and an edge 68 are pulled out of the plane of the insert 65 upwards.
  • the elevations 67 and the edge 68 form flow-conducting channels, which conduct a fluid flowing through to the corresponding openings 12, 12 'of the plate heat exchanger 1.
  • the nubs in the center region of the insert-like elevations 67 act on the fluid flowing through turbulence generating.
  • these knob-shaped elevations 67 serve the support of the insert on an adjacent cover plate (not shown).
  • the underside of the insert 65 rests on a closure plate 66.
  • the openings 64, 64 'of the insert 65 correspond with the corresponding openings of the end plate 66.
  • the end plate 66 has at its edges formations 70, which are provided with openings 69 and serve the attachment of the end plate 66 to another body.
  • the end plate 66 and the insert 65 are soldered together and with the heat exchanger plates 3 of the plate heat exchanger 1 fluid-tight and mechanically strong.
  • Fig. 10 shows a partial section through a plate heat exchanger 1 with a plurality of heat exchanger plates 3, a connection plate 2 and a coolant connection 9.
  • the opening 12 'of the lowermost heat exchanger plate 3 is fluid-tightly sealed by a cover plate 71, whereas the opening 12 is arranged above a corresponding opening 72 of the cover plate 71, so that at this point a fluid passage is made possible.
  • the cover plate 71 is in turn fluid-tightly connected to the insert 65, wherein the opening 64 'of the insert 65 is disposed on the openings 12 and 72 of the heat exchanger plate 3 and the cover plate 71.
  • the peripheral edge 68 of the insert 65 is fluid-tightly connected to the cover plate 71 at its edges.
  • the elevations 67 form with the cover plate 71 flow-conducting channels, through which a fluid flowing through mixed and to the openings 64, 64 'is passed.
  • the underside of the insert 65 is fluid-tight and mechanically firmly connected to the end plate 66, in particular soldered.
  • the end plate 66 has openings 64, 64 ', through which a fluid can flow. In these openings 64, 64 'connecting pieces are used, which allow a connection of the plate heat exchanger 1 to a motor or 1 gear housing.
  • the formations 70 with the openings 69 are used to attach the plate heat exchanger 1 to the aforementioned engine or transmission housings.

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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)

Description

Die Erfindung betrifft einen Plattenwärmetauscher, insbesondere einen Öl/Kühlmittel-Kühler für Verbrennungskraftmaschinen nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a plate heat exchanger, in particular an oil / coolant cooler for internal combustion engines according to the preamble of patent claim 1.

Durch die US-A 4,708,199 wurde ein Plattenwärmetauscher mit kreisförmigen aufeinandergestapelten Platten gleicher Form bekannt. Dieser kreisrunde Stapelscheibenwärmetauscher ist für die Kühlung von Motoröl durch Kühlmittel vorgesehen und wird mittels eines zentral angeordneten Rohres am Motorblock befestigt. Dieser Typ von Rundscheibenölkühler wird jeweils mit einem koaxial zu dem Zentralrohr angeordneten Ölfilter verbaut, die Ölzulauf- und -abströmöffnungen sind an diese spezielle Bauweise angepaßt. Die Durchtrittsöffnungen für das erste Fluid (Motoröl) und das zweite Fluid (Wasser) liegen jeweils auf einem gemeinsamen Kreis, wobei die Durchtrittsöffnungen untereinander auf dem Umfang des gemeinsamen Kreises den gleichen Abstand bzw. Umfangswinkel aufweisen. Bei den Durchtrittsöffnungen wechselt jeweils eine einfache Durchtrittsöffnung mit einer Durchtrittsöffnung mit Kragen oder Ausprägung ab. Beim Zusammenbau des Rundscheibenwärmetauschers werden benachbarte Platten jeweils um die Teilung benachbarter Durchtrittsöffnungen verdreht, so daß sich mindestens zwei Durchgangskanäle für das Öl und mindestens zwei Durchgangskanäle für das Kühlmittel ausbilden. Diese Bauweise beruht darauf, daß alle Platten kreisförmig ausgebildet sind, einen kreisringförmigen hochgestellten Rand aufweisen und um eine gemeinsame Achse schwenkbar sind.By the US-A 4,708,199 a plate heat exchanger has been known with circular stacked plates of the same shape. This circular stacked plate heat exchanger is provided for the cooling of engine oil by coolant and is attached by means of a centrally located tube on the engine block. This type of disc oil cooler is installed in each case with a coaxial with the central pipe arranged oil filter, the oil inlet and -abströmöffnungen are adapted to this special design. The passage openings for the first fluid (engine oil) and the second fluid (water) are each on a common circle, wherein the passage openings have the same distance or circumferential angle to each other on the circumference of the common circle. In the passage openings each changes a simple passage opening with a passage opening with collar or expression. When assembling the circular heat exchanger adjacent plates are each rotated by the pitch of adjacent passage openings, so that at least two passageways for the oil and at least two passageways for the coolant form. This construction is based on the fact that all plates are circular, have an annular raised edge and are pivotable about a common axis.

Es ist aus der EP-B1-258 236 bekannt, die Platten eines Plattenwärmetauschers mit umlaufenden Rändern zu versehen, die bei mehreren aufeinandergestapelten Platten ineinandergreifen, so daß sie durch einen Lötvorgang dicht gelötet werden können. Ferner ist bekannt, einem Plattenwärmetauscher zwei Fluide, ein Arbeits- und ein Kühlmedium, über jeweils zwei Anschlußstutzen zuzuführen, wobei nach der oben genannten EP-B1-258 236 die äußere Platte, an der die Anschlußstutzen befestigt sind, durch eine Stützplatte stabilisiert ist.It is from the EP-B1-258,236 known to provide the plates of a plate heat exchanger with circumferential edges, which interlock at several stacked plates so that they can be soldered tight by a soldering process. It is also known, a plate heat exchanger to supply two fluids, a working and a cooling medium, in each case via two connecting pieces, wherein after the above EP-B1-258,236 the outer plate, to which the connecting pieces are fastened, is stabilized by a support plate.

Nachteilig ist beim vorgenannten Stand der Technik, daß für einen solchen Plattenwärmetauscher eine Vielzahl von Einzelteilen benötigt wird. Die unterschiedliche Ausgestaltung der einzelnen Platten des Wärmetauschers ist hierbei besonders kostenträchtig, da für jede Plattenform eigene Presswerkzeuge benötigt werden. Außerdem wird auch der Zusammenbau des Wärmetauschers erschwert, da die unterschiedlichen Platten in einer bestimmten Reihenfolge montiert werden müssen.A disadvantage of the aforementioned prior art that a large number of individual parts is required for such a plate heat exchanger. The different design of the individual plates of the heat exchanger is in this case particularly costly, since for each plate shape own pressing tools are needed. In addition, the assembly of the heat exchanger is difficult because the different plates must be mounted in a particular order.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Plattenwärmetauscher der eingangs genannten Art so auszugestalten, daß die Anzahl der verwendeten Gleichteile erhöht, bzw. die Anzahl der verwendeten Teile insgesamt verringert wird.The invention is therefore the object of a plate heat exchanger of the type mentioned in such a way that the number of common parts used increases, or the number of parts used is reduced overall.

Zur Lösung dieser Aufgabe wird ein Plattenwärmetauscher mit den Merkmalen des Anspruchs 1 vorgeschlagen, bei dem in den Wärmetauscherplatten Turbulenzeinlagen angeordnet sind.To solve this problem, a plate heat exchanger with the features of claim 1 is proposed in which turbulence inserts are arranged in the heat exchanger plates.

Die in Anspruch 1 vorgeschlagene Ausgestaltung vermindert die Anzahl der verwendeten Wärmetauscherplatten, so daß alle Platten mit dem gleichen Werkzeug hergestellt werden können. Ein besonderes Gehäuse für den Plattenwärmetauscher wird nicht benötigt, da die umlaufenden Ränder der Wärmetauscherplatten fügetechnisch dicht verbunden, beispielsweise verlötet, sind und somit eine gehäuseähnliche äußere Hülle des Plattenwärmetauschers bilden. Aus dieser Konstruktion ergibt sich als weiterer Verteil, daß eine Leckage an den Verbindungsstellen lediglich zu einem Austritt eines Fluids führt, eine Vermischung der Fluide aber ausgeschlossen ist.The proposed in claim 1 embodiment reduces the number of heat exchanger plates used, so that all plates can be manufactured with the same tool. A special housing for the plate heat exchanger is not needed, since the peripheral edges of the heat exchanger plates are joined by joining technology, for example, soldered, and thus form a housing-like outer shell of the plate heat exchanger. From this construction results as a further distribution that leakage at the joints leads only to a discharge of a fluid, but mixing of the fluids is excluded.

Nach Anspruch 1 wird die Gestaltung des Zwischenraums zwischen zwei aufeinandergestapelten Wärmetauscherplatten durch die Verwendung unterschiedlicher Turbulenzeinlagen, variiert. Auf diese Weise kann der Plattenwärmetauscher sehr einfach auf unterschiedliche Fluide bzw. unterschiedliche Einsatzzwecke (z.B. geringer Druckverlust oder hohe Wärmeaustauschleistung) abgestimmt werden. Die Wärmetauscherplatten, die Turbulenzeinlagen und alle übrigen Anbauteile können dabei aus dem gleichen Werkstoff gefertigt sein, wodurch ein Recycling des Wärmetauschers sehr einfach möglich ist. Andererseits können einzelne Bauteile aber auch aus unterschiedlichen Werkstoffen hergestellt sein, wodurch eine Anpassung an spezielle Einsatzgebiete sehr erleichtert wird.According to claim 1, the design of the gap between two stacked heat exchanger plates by the use of different turbulence inserts, is varied. In this way, the plate heat exchanger can be very easily adapted to different fluids or different uses (eg low pressure loss or high heat exchange performance). The heat exchanger plates, the turbulence inserts and all other attachments can be made of the same material, whereby a recycling of the heat exchanger is very easy. On the other hand, individual components can also be made of different materials, whereby adaptation to special applications is greatly facilitated.

Beispielsweise sind in die Wärmetauscherplatte turbulenzerzeugende Erhebungen eingeprägt. Durch diese Ausgestaltung wird das Einlegen einer einzelnen Turbulenzeinlage vermieden und die Zahl der verwendeten Teile deutlich reduziert.For example, turbulence-generating elevations are embossed in the heat exchanger plate. This embodiment avoids the insertion of a single turbulence insert and significantly reduces the number of parts used.

Nach Anspruch 2 können die Wärmetauscherplatten durch die U-förmige Ausbildung der Ausprägungen mit Wärmetauscherplatten kombiniert werden, die noch Dichtscheiben benötigen.According to claim 2, the heat exchanger plates can be combined by the U-shaped design of the characteristics with heat exchanger plates that still need sealing washers.

Nach den Ansprüchen 1 und 3 wird der Plattenwärmetauscher mit einer Abschlußplatte versehen, die zwei Öffnungen aufweist, die mit zwei entsprechenden Öffnungen in den Wärmetauscherplatten korrespondieren. Durch diese Ausgestaltung kann die Zu- und Abfuhr eines Fluids von der Oberseite und die des anderen Fluids von der Unterseite her erfolgen. Besonders vorteilhaft ist dies in dem Fall, daß der Plattenwärmetauscher an der Unterseite mit Anschlußstutzen versehen ist, die einen glatten Schaft mit einer eingearbeiteten Nut aufweisen, in die ein Dichtring eingelegt ist. Solch ein Plattenwärmetauscher kann durch einfache Steckmontage an den Ölkreislauf eines Motors oder Getriebes angeschlossen werden. Die Befestigung an einem Motor oder Getriebe erfolgt duch geeignete Hilfsmittel. So ist nach Anspruch 4 eine spezielle Befestigungsplatte an dem Plattenwärmetauscher vorgesehen, die nach Kundenwünschen kostengünstig hergestellt werden kann.According to claims 1 and 3, the plate heat exchanger is provided with a closure plate having two openings corresponding to two corresponding openings in the heat exchanger plates. With this configuration, the supply and discharge of a fluid from the top and that of the other fluid from the bottom can be carried out. This is particularly advantageous in the case that the plate heat exchanger is provided at the bottom with connecting pieces, which have a smooth shaft with an incorporated groove into which a sealing ring is inserted. Such a plate heat exchanger can be connected by simple plug-in assembly to the oil circuit of a motor or gearbox. The attachment to a motor or gearbox takes place by suitable means. Thus, according to claim 4, a special mounting plate is provided on the plate heat exchanger, which can be produced inexpensively according to customer requirements.

Nach Anspruch 5 weist bereits die Abschlußplatte Ausformungen und Öffnungen zur Befestigung des Plattenwärmetauschers an einem anderen Körper auf. Eine spezielle Befestigungsplatte wird dadurch überflüssig. Die Ausformungen und Öffnungen der Abschlußplatte werden nach den jeweiligen Kundenwünschen gefertigt. So ist für Plattenwärmetauscher gleicher Leistung nur jeweils die Abschlußplatte kundenspezifisch ausgestaltet. Besonders vorteilhaft und preisgünstig wird die Abschlußplatte als ein tiefgezogenes Blechteil ausgeführt. Neben einer Einsparung an Material und Bearbeitungskosten führt eine solche Ausführungsform auch zu einer merklichen Gewichtsreduzierung. Die Öffnungen, die in die Abschlußplatte eingebracht werden müssen, können bei einem tiefgezogenen Blechteil eingestanzt werden, so daß eine aufwendige, spanabhebende Fertigung nicht notwendig ist.According to claim 5, already has the end plate formations and openings for attachment of the plate heat exchanger to another body. A special mounting plate is thereby superfluous. The formations and openings of the end plate are manufactured according to the respective customer requirements. Thus, only the end plate is designed customer-specific for plate heat exchangers of the same power. Particularly advantageous and inexpensive, the end plate is designed as a deep-drawn sheet metal part. In addition to a saving in material and processing costs, such an embodiment also leads to a significant reduction in weight. The openings that must be introduced into the end plate can be stamped in a deep-drawn sheet metal part, so that a complex, machining production is not necessary.

Nach Anspruch 6 wird zwischen der Abschlußplatte und der angrenzende Wärmetauscherplatte ein Einlegeteil und ein Abdeckblech eingelegt. Das Abdeckblech deckt mindestens eine Öffnung der Wärmetauscherplatte fluiddicht ab, so daß eine Umlenkung des Fluids innerhalb des Zwischenraumes zwischen zwei Wärmetauscherplatten gewährleistet ist. Andererseits weist das Abdeckblech Öffnungen auf, die eine Verbindung der Fluidkanäle des Plattenwärmetauschers zu den Anschlußstutzen ermöglichen. Die Anschlußstutzen, beispielsweise eine Ausführungsform mit glattem Schaft, werden in die Abschlußplatte des Plattenwärmetauschers eingesetzt und mit der Abschlußplatte fügetechnisch verbunden.According to claim 6, an insert and a cover plate is inserted between the end plate and the adjacent heat exchanger plate. The cover plate covers at least one opening of the heat exchanger plate fluid-tight, so that a deflection of the fluid is ensured within the space between two heat exchanger plates. On the other hand, the cover plate openings, which allow a connection of the fluid channels of the plate heat exchanger to the connection piece. The connecting pieces, for example, an embodiment with a smooth shaft, are inserted into the end plate of the plate heat exchanger and connected by joining technology with the end plate.

Nach Anspruch 7 ist zwischen dem Abdeckblech und der Abschlußplatte ein Einlegeteil eingelegt. Dieses Einlegteil leitet das durchströmende Fluid zu den fluidführenden Kanälen des Plattenwärmetauschers, bzw. zu den Anschlußstutzen in der Abschlußplatte. Mit Hilfe des Einlegeteiles kann der Fluidstrom zu beliebig angeordneten Anschlußstutzen in der Abschlußplatte geleitet werden, so daß die Anschlußstutzen den Fluidkanälen des Plattenwärmetauschers nicht gegenüber liegen müssen. Eine kundenspezifische Konfiguration des Plattenwärmetauschers wird dadurch erleichtert, da auf die geometrischen Gegebenheiten am Einbauort leicht Rücksicht genommen werden kann. Das Einlegeteil ist fluiddicht und mechanisch stabil mit dem Abdeckblech und der Abschlußplatte fügetechnisch verbunden, insbesondere verlötet.According to claim 7, an insert is inserted between the cover plate and the end plate. This Einlegteil directs the fluid flowing through to the fluid-carrying channels of the plate heat exchanger, or to the connection piece in the end plate. With the help of the insert, the fluid flow can be passed to any arranged connecting piece in the end plate, so that the connecting pieces the fluid channels of the plate heat exchanger need not be opposite. A customized configuration of the plate heat exchanger is facilitated because the geometric conditions at the installation site can be easily taken into account. The insert is fluid-tight and mechanically stable with the cover plate and the end plate by joining technology, in particular soldered.

Die Erfindung ist in der Zeichnung anhand von Ausführungsbeispielen für Öl/Kühlmittel-Kühler dargestellt. Es zeigen:

Fig.1
Explosionszeichnung eines nicht erfindungsgemäßen Plattenwärmetauschers mit Turbu- lenzeinlagen;
Fig. 2
Explosionszeichnung zweier Wärmetauscherplatten mit angeformten Dichtringen und Turbulenzeinlagen;
Fig.3
Explosionszeichnung zweier nicht erfindungsgemäßen Wärmetauscherplatten mit angeformten Dichtringen und einer Turbulenzeinlage;
Fig.4
Explosionszeichnung zweier Wärmetauscherplatten mit angeformten Dichtringen ohne Turbulenzeinlagen;
Fig. 5
Ansicht eines montierten Plattenwärmetauschers;
Fig. 6
Seitenansicht eines montierten Plattenwärmetauschers;
Fig. 7
Draufsicht einer tiefgezogenen Abschlußplatte;
Fig. 8
Seitenansicht einer tiefgezogenen Abschlußplatte;
Fig. 9
Explosionszeichnung eines Einlegeteils und einer Abschlußplatte und
Fig. 10
Schnitt eines Plattentwärmetauschers mit Einlegeteil und Abschlußplatte.
The invention is illustrated in the drawing with reference to embodiments of oil / coolant radiator. Show it:
Fig.1
Exploded view of a plate heat exchanger not according to the invention with turbulence inserts;
Fig. 2
Exploded view of two heat exchanger plates with molded sealing rings and turbulence inserts;
Figure 3
Exploded view of two non-inventive heat exchanger plates with molded sealing rings and a turbulence insert;
Figure 4
Exploded view of two heat exchanger plates with molded sealing rings without turbulence inserts;
Fig. 5
View of a mounted plate heat exchanger;
Fig. 6
Side view of a mounted plate heat exchanger;
Fig. 7
Top view of a deep-drawn end plate;
Fig. 8
Side view of a deep-drawn end plate;
Fig. 9
Exploded view of an insert and a closure plate and
Fig. 10
Section of a plate heat exchanger with insert and end plate.

Fig. 1 zeigt eine Explosionszeichnung eines geschnittenen nicht erfindungsgemäßen Plattenwärmetauschers 1. Hierbei sind zwischen zwei gleichen, wannenförmigen Wärmetauscherplatten 3 jeweils eine Turbulenzeinlage 4 bzw. 4' und jeweils zwei kreisringförmige Dichtscheiben 5 (im Schnitt ist nur eine Dichtscheibe 5 dargestellt) angeordnet. Die Dichtscheiben 5 sind in der Regel aus einem metallischen Werkstoff, sie können aber auch aus Kunststoff oder Keramik hergestellt sein. Sie weisen die gleiche Dicke d wie die Turbulenzeinlagen 4, 4' auf und sind in Öffnungen 15, 15' der Turbulenzeinlagen 4, 4' eingelegt, wobei der innendurchmesser der Öffnungen 15, 15' dem Außendurchmesser der Dichtscheiben 5 entspricht. Die Turbulenzeinlagen 4, 4' sind so in die wannenförmigen Wärmetauscherplatten 3 eingelegt, daß die Dichtscheiben 5 abwechselnd über den Öffnungen 12 und 12' zu liegen kommen, wobei die Öffnungen der Dichtscheiben 5 mit den Öffnungen 12, 12' korrespondieren. Die Dichtscheiben 5 dichten die Öffnungen 12 bzw. 12' gegenüber dem Raum zwischen den Wärmetauscherplatten 3 und der darin befindlichen Turbulenzeinlage 4, 4' ab, so daß Durchgangskanäle entstehen, durch die das entsprechende Fluid in den nächsten angrenzenden Zwischenraum gelangt. Bei dem hier dargestellten Öl/Kühlmittel-Kühler ergibt sich eine abwechselnde Befüllung der Zwischenräume mit Kühlmittel, Öl, Fühlmittel usw. Die Verteilung des Fluids in den Zwischenräumen erfolgt aufgrund des Druckes, mit dem die Fluide in den Plattenwärmetauscher 1 gepreßt werden, wobei die einzelnen Zwischenräume eine gewisse Drosselung der Fluidströme durch die Zwischenräume bewirken. Die gleichmäßige Verteilung der Fluide in den Zwischenräumen kann durch die Ausgestaltung der Turbulenzeinlagen 4, 4' gesteuert werden. Die Zu- und Ableitungen für die Fluide können dabei in einer Reihe (hier dargestellt) oder diagonal gegenüberliegend (Kreuzstrom) angeordnet sein. Bei Fluiden, deren Viskosität sich stark unterscheidet, kommen Turbulenzeinlagen 4, 4' zum Einsatz, die sich in ihrer Ausgestaltung unterscheiden. Im dargestellten Beispiel sind die Turbulenzeinlagen 4 für ein Kühlmittel und die Turbulenzeinlagen 4' flor ein Öl ausgelegt. Das Kühlmittel wird über Anschlüsse 9 zubzw. abgeleitet (nur ein Anschluß dargestellt). Die Anschlüsse 9 sind auf einer Anschlußplatte 2 befestigt. Sie sind durchgängig zu den Öffnungen 12' der Wärmetauscherplatten 3 und den Öffnungen 14 der Turbulenzeinlagen 4. Jeder Zwischenraum Öl wird mittels der Dichtringe 5 gegenüber dem Kühlmittel strom abgedichtet, so daß das Kühlmittel in den nächsten Zwischenraum KM durchgeleitet wird. Die unterste Wärmetauscherplatte 3 des Plattenwärmetauschers 1 wird mittels einer Abschlußplatte 6 dicht verschlossen, so daß das Kühlmittel im Plattenwärmetauscher 1 umgelenkt wird und durch den zweiten Anschluß 9 wieder abfließt. Die Zu- bzw. Ableitung des Öls könnte ebenfalls mittels Anschlüssen an der Anschlußplatte 2 erfolgen. Im dargestellten Beispiel sind die Ölanschlüsse 8 jedoch den Kühlmittelanschlüssen 9 schräg gegenüberliegend angeordnet. Hierbei sind in der Anschlußplatte 6 Öffnungen 13 vorgesehen, die mit den Öffnungen 12 der Wärmetauscherplatten 3 korrespondieren, während die Anschlußplatte 2 die Öffnungen 12 der obersten Wärmetauscherplatte 3 dicht verschließt. Das Öl wird Ober Anschlußstutzen 8 eingeleitet, die in die Anschlußplatte 6 eingesetzt und mit dieser fest verbunden sind. Hierbei wird das Öl durch die Anschlüsse 8 und die Öffnungen 13 und 12 durch einen Zwischenraum KM in den ersten Zwischenraum Öl eingeleitet, wobei der Zwischenraum KM durch Dichtscheiben 5 gegenüber dem Ölstrom abgeschlossen ist. Ein Teil des Ölstromes wird im Zwischenraum Öl verteilt, dabei umgelenkt und fließt über den zweiten Anschluß 8 ab. Dabei gibt das Öl über die Wandungen der Wärmetauscherplatte 3 und die Turbulenzeinlagen 4 seine Wärme an das Kühlmittel in den benachbarten Zwischenräumen KM ab. Der restliche Ölstrom wird durch den nächsten Zwischenraum KM, der wiederum durch Dichtscheiben 5 gegenüber dem Ölstrom abgedichtet ist, in den folgenden Zwischenraum Öl weitergeleitet. Die Anzahl der Wärmetauscherplatten 3 wird so gewählt, daß die geforderte Wärmeaustauschleistung des Wärmetauschers 1 erreicht wird, sie kann somit von dem hier erläuterten Beispiel abweichen. Die Anschlußstutzen 8 weisen einen glatten Schaft 10 auf, in den eine ringförmige Nut 11 eingearbeitet ist. Die Nut 11 dient der Aufnahme eines O-Dichtringes. Durch diese Ausgestaltung kann der Plattenwärmetauscher 1 durch Steckmontage an beispielsweise einem Motorblock montiert werden. Zur Fixierung des Plattenwärmetauschers 1 an einem solchen Motorblock sind in der Abschlußplatte 6 Bohrungen 16 vorgesehen, mittels derer der Plattenwärmetauscher 1 z.B. an Stehbolzen angeschraubt werden kann. Die Anpassung der Befestigungen an spezielle Kundenwünsche erfolgt mit Hilfe einer individuellen Befestigungsplatte 7, die in der Darstellung als gekröpfte Platte vorgesehen ist. Die Befestigungsplatte 7 kann zusätzlich zur Abschlußplatte 6, beispielsweise auch nachträglich, oder allein am Plattenwärmetauscher 1 montiert werden, wobei sie im zweiten Fall die Funktion der Abschlußplatte 6 mit übernimmt. Die aufeinandergestapelten Wärmetauscherplatten 3 werden fügetechnisch an ihren aneinanderliegenden umlaufenden Rändern dicht miteinander verbunden, z.B. gelötet oder geklebt, hierbei werden die eingelegten Dichtscheiben 5 und die Turbulenzeinlagen 4, 4' mit verbunden. Durch die große Anzahl von Verbindungen (z.B. Wärmetauscherplatten 3 mit den Turbulenzeinlagen 4, 4') wird der Wärmetauscher 1 sehr stabil, da die Verbindungen in den Zwischenräumen wie Zuganker wirken. Fig. 1 shows an exploded view of a cut plate heat exchanger not according to the invention 1. Here are between two identical, tub-shaped heat exchanger plates 3 each a turbulence insert 4 or 4 'and two annular sealing discs 5 (in section, only a sealing disc 5 is shown). The sealing discs 5 are usually made of a metallic material, but they can also be made of plastic or ceramic. They have the same thickness d as the turbulence inserts 4, 4 'and are inserted in openings 15, 15' of the turbulence inserts 4, 4 ', the inner diameter of the openings 15, 15' corresponding to the outer diameter of the sealing disks 5. The turbulence inserts 4, 4 'are inserted into the trough-shaped heat exchanger plates 3 such that the sealing disks 5 come to lie alternately over the openings 12 and 12', the openings of the sealing disks 5 corresponding to the openings 12, 12 '. The sealing discs 5 seal the openings 12 and 12 'relative to the space between the heat exchanger plates 3 and the turbulence insert 4, 4' therein, so that passageways are formed through which passes the corresponding fluid in the next adjacent space. In the case of the oil / coolant cooler shown here, there is an alternating filling of the intermediate spaces with coolant, oil, sensor means, etc. The distribution of the fluid in the intermediate spaces is due to the pressure with which the fluids are pressed into the plate heat exchanger 1, wherein the individual Gaps cause a certain throttling of the fluid flows through the interstices. The uniform distribution of the fluids in the interstices can be controlled by the design of the turbulence inserts 4, 4 '. The supply and discharge lines for the fluids can be arranged in a row (shown here) or diagonally opposite (cross flow). For fluids whose viscosity differs greatly, turbulence inserts 4, 4 'are used, which differ in their design. In the example shown, the turbulence inserts 4 are designed for a coolant and the turbulence inserts 4 'flor an oil. The coolant is via connections 9 zubzw. derived (only one port shown). The terminals 9 are mounted on a terminal plate 2. They are continuous to the openings 12 'of the heat exchanger plates 3 and the openings 14 of the turbulence inserts 4. Each gap oil is sealed by means of the sealing rings 5 against the coolant flow, so that the coolant is passed through in the next space KM. The lowermost heat exchanger plate 3 of the plate heat exchanger 1 is sealed by means of a closure plate 6, so that the coolant is deflected in the plate heat exchanger 1 and 9 flows through the second port again. The supply and discharge of the oil could also be done by means of connections to the connection plate 2. In the example shown, the oil ports 8, however, the coolant ports 9 are arranged obliquely opposite. In this case, openings 13 are provided in the connection plate 6, which correspond to the openings 12 of the heat exchanger plates 3, while the connection plate 2 closes the openings 12 of the uppermost heat exchanger plate 3 tightly. The oil is introduced upper connecting piece 8, which are inserted into the terminal plate 6 and fixedly connected thereto. In this case, the oil is introduced through the ports 8 and the openings 13 and 12 through a gap KM in the first space oil, the gap KM is completed by sealing discs 5 against the flow of oil. A portion of the oil flow is distributed in the space oil, thereby deflected and flows through the second port 8 from. In this case, the oil via the walls of the heat exchanger plate 3 and the turbulence inserts 4 its heat to the coolant in the adjacent spaces KM from. The remaining oil flow is through the next gap KM, which in turn is sealed by sealing discs 5 against the flow of oil, forwarded in the following space oil. The number of heat exchanger plates 3 is chosen so that the required heat exchange performance of the heat exchanger 1 is achieved, it may therefore differ from the example explained here. The connecting pieces 8 have a smooth shaft 10, in which an annular groove 11 is incorporated. The groove 11 serves to receive an O-ring seal. By this configuration, the plate heat exchanger 1 can be mounted by plug-in mounting on, for example, an engine block. For fixing the plate heat exchanger 1 to such an engine block 6 holes 16 are provided in the end plate, by means of which the plate heat exchanger 1 can be screwed to stud bolts for example. The adaptation of the fasteners to specific customer requirements is carried out with the help of an individual mounting plate 7, which is provided in the representation as a cranked plate. The mounting plate 7 can be mounted in addition to the end plate 6, for example, subsequently, or alone on the plate heat exchanger 1, wherein it takes over the function of the end plate 6 in the second case. The stacked heat exchanger plates 3 are joining technically connected to each other at their adjacent peripheral edges, eg soldered or glued, in this case, the inserted sealing discs 5 and the turbulence inserts 4, 4 'are connected. Due to the large number of compounds (eg heat exchanger plates 3 with the turbulence inserts 4, 4 '), the heat exchanger 1 is very stable, since the compounds act in the interstices as tie rods.

Fig.2 zeigt eine Variante der Wärmetauscherplatten 3 aus Fig. 1 in einer dem Anspruch 1 entsprechenden Gestaltung. Auch bei dieser Ausgestaltung der Wärmetauscherplatten 23 sind alle Wärmetauscherplatten 23 eines Plattenwärmetauschers 1 gleich. Allerdings wird bei der Montage des Wärmetauschers 1 jede zweite Wärmetauscherplatte 23 um 180° um die Hochachse gedreht. Um die Öffnungen 26 der Wärmetauscherplatte 23 sind kreisringförmige Ausprägungen 25 angeformt, die der Abdichtung der Öffnung 26 gegenüber der Öffnung 27 dienen. Die Höhe h der Ausprägungen 25 entspricht der Dicke d der Turbulenzeinlagen 4, 4'. Der Kopf 28 der Ausprägungen 25 ist abgeflacht, um einen guten Kontakt zu der benachbarten Wärmetauscherplatte 23 zu gewährleisten, so daß der Querschnitt der Ausprägung 25 ein "U"-Profil aufweist, das an der Basis des "U" stark abgeflacht ist. Zwischen zwei Wärmetauscherplatten 23 ist eine Turbulenzeinlage 4 bzw. 4' (für Kühlmittel bzw. für Öl) angeordnet, wobei durch die größeren Öffnungen 15, 15' der Turbulenzeinlagen 4, 4' die Ausprägungen 25 der Wärmetauscherplatte 23 durchgesteckt sind. Die Öffnungen 14, 14' der Turbulenzeinlagen kommen dabei über den Öffnungen 27 und der nicht ausgeprägten Seite der Öffnung 26 zu liegen. Dichtscheiben 5 sind bei dieser Ausführungsform nicht erforderlich. Die Handhabung bei der Montage und dem Fügen des Wärmetauschers 1 entspricht der in der Beschreibung zu Figur 1 dargestellten Vorgehensweise. Fig.2 shows a variant of the heat exchanger plates 3 Fig. 1 in a design corresponding to claim 1. Also in this embodiment of the heat exchanger plates 23 all heat exchanger plates 23 of a plate heat exchanger 1 are the same. However, during assembly of the heat exchanger 1, every second heat exchanger plate 23 is rotated by 180 ° about the vertical axis. Around the openings 26 of the heat exchanger plate 23 annular shapes 25 are formed, which serve to seal the opening 26 with respect to the opening 27. The height h of the forms 25 corresponds to the thickness d of the turbulence inserts 4, 4 '. The head 28 of the embossments 25 is flattened to ensure good contact with the adjacent heat exchanger plate 23, so that the cross section of the embossment 25 has a "U" profile which is greatly flattened at the base of the "U". Between two heat exchanger plates 23, a turbulence insert 4 or 4 '(for coolant or for oil) is arranged, wherein through the larger openings 15, 15' of the turbulence inserts 4, 4 ', the forms 25 of the heat exchanger plate 23 are inserted. The openings 14, 14 'of the turbulence inserts come to lie over the openings 27 and the non-pronounced side of the opening 26. Sealing washers 5 are not required in this embodiment. The handling during assembly and joining of the heat exchanger 1 corresponds to that in the description FIG. 1 illustrated approach.

Fig. 3 zeigt eine weitere nicht erfindungsgemäße Variante der in Figur 2 dargestellten Wärmetauscherplattenform. Diese Variante erleichtert aber das Verständnis der Erfindung. Hierbei weisen die Wärmetauscherplatten 33 ebenfalls kreisringförmige Ausprägungen 35 um die Öffnungen 36 auf. Zusätzlich sind in die Wärmetauscherplatte 33 zwischen den Öffnungen 36 und 37 turbulenzerzeugende Erhebungen 39, beispielsweise kegelstumpfförmige Noppen, eingeprägt, die die gleiche Höhe h wie die Ausprägungen 35 aufweisen. Die Erhebungen 39 dienen im montierten Zustand der Erzeugung von Turbulenzen, so daß auf die Einbringung von zusätzlichen Turbulenzeinlagen in den Zwischenraum (hier z.B. der Zwischenraum KM) verzichtet werden kann. Um die Öffnungen 37 verbleibt ein kreisförmiger Bereich in einem ungeprägten Zustand, um im montierten Zustand als Kontaktfläche zu der anliegenden kreisringförmigen Ausprägung 25 der benachbarten Wärmetauscherplatte 23 zu dienen. Die Wärmetauscherplatte 33 kann mit den Wärmetauscherplatten 3 oder 23 der Figuren 1 und 2 kombiniert werden, so daß in den Zwischenräumen Öl Turbulenzeinlagen Verwendung finden, während in die Zwischenräume KM lediglich die eingeprägten Erhebungen 39 hineinragen und für eine ausreichende Verwirbelung des Kühlmittels sorgen. Auch bei dieser Variante sind abwechselnd Zwischenräume für Kühlmittel und Zwischenräume für Öl vorgesehen. Der montierte Wärmetauscher wird in einem Arbeitsgang an den umlaufenden Rändern und an den Kontaktflächen der Ausprägungen 35 mit den benachbarten Wärmetauscherplatten 23 dicht gefügt. Gleichzeitig werden die Turbulenzeinlagen 4, 4' und die Erhebungen 39 mit den Wärmetauscherplatten 23, 33 verbunden. Fig. 3 shows a further variant not according to the invention in FIG. 2 illustrated heat exchanger plate shape. However, this variant facilitates the understanding of the invention. Here, the heat exchanger plates 33 also have annular shapes 35 around the openings 36. In addition, in the heat exchanger plate 33 between the openings 36 and 37 turbulence-generating elevations 39, for example, truncated conical nubs, impressed, which have the same height h as the characteristics 35. The elevations 39 are used in the assembled state of the generation of turbulence, so that it can be dispensed with the introduction of additional turbulence inserts in the intermediate space (here, for example, the gap KM). Around the openings 37 remains a circular area in an unembossed state to serve in the mounted state as a contact surface to the adjacent annular shape 25 of the adjacent heat exchanger plate 23. The heat exchanger plate 33 can with the heat exchanger plates 3 or 23 of the FIGS. 1 and 2 combined, so that find in the spaces oil turbulence inserts use, while in the spaces KM only the embossed projections 39 protrude and provide sufficient turbulence of the coolant. In this variant alternately spaces for coolant and spaces for oil are provided. The mounted heat exchanger is sealed in a single operation at the peripheral edges and at the contact surfaces of the forms 35 with the adjacent heat exchanger plates 23. At the same time, the turbulence inserts 4, 4 'and the elevations 39 are connected to the heat exchanger plates 23, 33.

Fig. 4 zeigt einen Wärmetauscher ohne separat eingelegte Turbulenzeinlagen 4, 4' oder Dichtscheiben 5 gemäß Anspruch 2. Die Wärmetauscherplatten 43 weisen um die Öffnungen 46 kreisringförmige Ausprägungen 45 auf, deren Querschnittsprofil etwa "U"-förmig ist. Zwischen den Öffnungen 46 und 47 und in den verbleibenden Randbereichen sind turbulenzerzeugende Erhebungen 49, beispielsweise kegelstumpfförmige Noppen, eingeprägt, wobei ein kreisförmiger Bereich um die Öffnungen 47 in einem ungeprägten Zustand verbleibt, um eine sichere Abdichtung mit einer anliegenden Ausprägung 45 der benachbarten Wärmetauscherplatte 43 zu gewährleisten. Bei der Montage werden die Wärmetauscherplatten 43 ohne zusätzliche Einlegeteile aufeinandergestapelt, wobei jede zweite Wärmetauscherplatte 43 um 180° um die Hochachse gedreht ist. Zur Erhöhung der Wärmeaustauschleistung können auch zwei unterschiedliche Wärmetauscherplatten 43' und 43" (nicht dargestellt) zum Einsatz kommen, bei denen die turbulanzerzeugenden Erhebungen 49 einer Wärmetauscherplatte 43' auf den Einsatz mit Kühlmittel und die turbulenzerzeugenden Erhebungen 49 einer zweiten Wärmetauscherplatte 43" auf den Einsatz mit Öl abgestimmt sind. Fig. 4 shows a heat exchanger without separately inserted turbulence inserts 4, 4 'or sealing disks 5 according to claim 2. The heat exchanger plates 43 have around the openings 46 annular shapes 45, the cross-sectional profile is approximately "U" -shaped. Between the openings 46 and 47 and in the remaining edge areas turbulence-generating elevations 49, such as frustoconical knobs, impressed, with a circular area around the openings 47 remains in an unembossed state to a secure seal with an adjacent expression 45 of the adjacent heat exchanger plate 43 guarantee. During assembly, the heat exchanger plates 43 are stacked without additional inserts, with each second heat exchanger plate 43 is rotated by 180 ° about the vertical axis. To increase the heat exchange performance, two different heat exchanger plates 43 'and 43 "(not shown) can be used, in which the turbulence-generating elevations 49 of a heat exchanger plate 43' for use with coolant and the turbulence-generating elevations 49 a second heat exchanger plate 43" on the use tuned with oil.

Die Fig. 5 und 6 zeigen einen Plattenwärmetauscher mit zwölf Wärmetauscherplatten 3 im montierten Zustand. Hierbei sind die wannenförmigen Wärmetauscherplatten 3 ineinandergestapelt, wobei ihre umlaufenden Ränder aneinander zu liegen kommen. In Abweichung vom Aufbau des Plattenwärmetauschers 1 in Figur 1 ist die Anschlußplatte 2 auf der Unterseite der Wärmetauscherplatte 3 montiert, während die Abschlußplatte 6 (nicht sichtbar), mit den Anschlußstutzen 8 und die individuelle Befestigungsplatte 7 auf der Oberseite der Wärmetauscherplatte 3 angeordnet ist. Das Kühlmittel wird über den linken Anschlußstutzen 9 zugeführt und im Wärmetauscher 1 auf sechs Zwischenräume verteilt. Nach dem Durchströmten der Zwischenräume wird das Kühlmittel über den rechten Anschlußstutzen 9 wieder abgeführt. Der Öldurchfluß erfolgt analog, wobei die Ölzufuhr über den rechten Anschlußstutzen 8 und die Ölabfuhr über den linken Anschlußstutzen 8 erfolgt. Das Öl wird im Wärmetauscher 1 auf fünf Zwischenräume verteilt und dort gekühlt. Der Anschluß des Wärmetauschers 1 an z.B. einen Motor- oder Getriebeblock erfolgt über Steckmontage, wobei die Anschlußstutzen 8 mit den glatten Schäften 10 und den Dichtringen 17, die in die Ringnuten 11 eingelegt sind, in entsprechende Aufnahmebohrungen am Gehäuse des Motor- oder Getriebeblocks eingesteckt werden. Der Wärmetauscher 1 wird dort mit Hilfe der individuellen Befestigungsplatte 7 befestigt, beispielsweise an entsprechenden Stehbolzen angeschraubt. Das Kühlmittel wird über Kühlmittelschläuche zugeführt, die in bekannter Weise an den Anschlüssen 9 befestigt werden.The FIGS. 5 and 6 show a plate heat exchanger with twelve heat exchanger plates 3 in the assembled state. Here, the trough-shaped heat exchanger plates 3 are stacked with each other, with their peripheral edges come to rest each other. In deviation from the construction of the plate heat exchanger 1 in FIG. 1 the connection plate 2 is mounted on the underside of the heat exchanger plate 3, while the end plate 6 (not visible) is arranged with the connection piece 8 and the individual mounting plate 7 on the upper side of the heat exchanger plate 3. The coolant is supplied via the left connection piece 9 and distributed in the heat exchanger 1 to six spaces. After flowing through the gaps, the coolant is discharged via the right connection piece 9 again. The oil flow is analog, wherein the oil supply via the right connection piece 8 and the oil removal via the left connection piece 8. The oil is distributed in the heat exchanger 1 to five spaces and cooled there. The connection of the heat exchanger 1 to eg a motor or gear block via plug-in mounting, wherein the connecting piece 8 with the smooth shanks 10 and the sealing rings 17 which are inserted into the annular grooves 11 are inserted into corresponding receiving bores on the housing of the engine or transmission block , The heat exchanger 1 is fastened there by means of the individual fastening plate 7, for example screwed to corresponding stud bolts. The coolant is supplied via coolant hoses, which are fastened in a known manner to the terminals 9.

Die Fig. 7 und 8 zeigen eine Abschlußplatte 60, die als tiefgezogenes Blechteil ausgeführt ist. Sie weist zwei Öffnungen 64, 64' auf, die der Zu- bzw. Abfuhr eines Fluids dienen. Des weiteren sind vier Ausformungen 61 mit den Öffnungen 62 an die Abschlußplatte 60 angeformt. Sie dienen der Befestigung der Abschlußplatte an einem anderen Körper, beispielsweise einem Motor- oder Getriebeblock. Der äußere Rand 63 der Abschlußplatte 60 ist beispielsweise durch Tiefziehen senkrecht zur Bodenfläche der Abschlußplatte 60 aufgestellt, wodurch die Abschlußplatte 60 und die Ausformungen 61 in sich versteift werden und eine verwindungssichere Anbringung der Abschlußplatte 60 an einem anderen Körper gewährleistet ist. Die Abschlußplatte 60 wird mit den Wärmetauscherplatten 3 des Plattenwärmetauschers 1 fluiddicht verlötet.The FIGS. 7 and 8 show a closure plate 60, which is designed as a deep-drawn sheet metal part. It has two openings 64, 64 ', which serve to supply and discharge of a fluid. Furthermore, four formations 61 are integrally formed with the openings 62 to the end plate 60. They serve to attach the end plate to another body, such as a motor or gear block. The outer edge 63 of the end plate 60 is set up, for example, by deep drawing perpendicular to the bottom surface of the end plate 60, whereby the end plate 60 and the formations 61 are stiffened in itself and a torsion-safe attachment of the end plate 60 is ensured on another body. The end plate 60 is soldered to the heat exchanger plates 3 of the plate heat exchanger 1 fluid-tight.

Fig. 9 zeigt ein Einlegeteil 65 und eine Abschlußplatte 66. Das Einlegeteil 65 ist als tiefgezogenes Blechteil ausgeführt. Hierbei werden Erhebungen 67 und ein Rand 68 aus der Plattenebene des Einlegeteils 65 nach oben herausgezogen. Die Erhebungen 67 und der Rand 68 bilden strömungsleitende Kanäle, die ein durchströmendes Fluid zu den entsprechenden Öffnungen 12, 12' des Plattenwärmetauschers 1 leiten. Die im mittleren Bereich des Einlegteils noppenförmigen Erhebungen 67 wirken auf das durchströmende Fluid turbulenzerzeugend. Des weiteren dienen diese noppenförmigen Erhebungen 67 der Abstützung des Einlegeteils an einem angrenzenden Abdeckblech (nicht dargestellt). Die Unterseite des Einlegeteils 65 liegt auf einer Abschlußplatte 66 auf. Hierbei korrespondieren die Öffnungen 64, 64' des Einlegeteils 65 mit den entsprechenden Öffnungen der Abschlußplatte 66. Die Abschlußplatte 66 weist an ihren Rändern Ausformungen 70 auf, die mit Öffnungen 69 versehen sind und der Befestigung der Abschlußplatte 66 an einem anderen Körper dienen. Die Abschlußplatte 66 und das Einlegeteil 65 werden miteinander und mit den Wärmetauscherplatten 3 des Plattenwärmetauschers 1 fluiddicht und mechanisch belastbar verlötet. Fig. 9 shows an insert 65 and a closure plate 66. The insert 65 is designed as a deep-drawn sheet metal part. In this case, elevations 67 and an edge 68 are pulled out of the plane of the insert 65 upwards. The elevations 67 and the edge 68 form flow-conducting channels, which conduct a fluid flowing through to the corresponding openings 12, 12 'of the plate heat exchanger 1. The nubs in the center region of the insert-like elevations 67 act on the fluid flowing through turbulence generating. Furthermore, these knob-shaped elevations 67 serve the support of the insert on an adjacent cover plate (not shown). The underside of the insert 65 rests on a closure plate 66. Here, the openings 64, 64 'of the insert 65 correspond with the corresponding openings of the end plate 66. The end plate 66 has at its edges formations 70, which are provided with openings 69 and serve the attachment of the end plate 66 to another body. The end plate 66 and the insert 65 are soldered together and with the heat exchanger plates 3 of the plate heat exchanger 1 fluid-tight and mechanically strong.

Fig. 10 zeigt einen Teilschnitt durch einen Plattenwärmetauscher 1 mit mehreren Wärmetauscherplatten 3, einer Anschlußplatte 2 und einem Kühlmittelanschluß 9. Die Öffnung 12' der untersten Wärmetauscherplatte 3 ist durch ein Abdeckblech 71 fluiddichtverschlossen, wohingegen die Öffnung 12 über einer korrespondierenden Öffnung 72 des Abdeckblechs 71 angeordnet ist, so daß an dieser Stelle ein Fluiddurchgang ermöglicht wird. Das Abdeckblech 71 ist mit dem Einlegeteil 65 wiederum fluiddicht verbunden, wobei die Öffnung 64' des Einlegeteils 65 auf den Öffnungen 12 bzw. 72 der Wärmetauscherplatte 3 bzw. des Abdeckblechs 71 angeordnet ist. Der umlaufende Rand 68 des Einlegeteils 65 ist mit dem Abdeckblech 71 an dessen Rändern fluiddicht verbunden. Die Erhebungen 67 bilden mit dem Abdeckblech 71 strömungsleitende Kanäle, durch die ein durchströmendes Fluid durchmischt und zu den Öffnungen 64, 64' geleitet wird. Die Unterseite des Einlegeteils 65 ist mit der Abschlußplatte 66 fluiddicht und mechanisch fest verbunden, insbesondere verlötet. Die Abschlußplatte 66 weist Öffnungen 64, 64' auf, durch die ein Fluid durchströmen kann. In diese Öffnungen 64, 64' werden Anschlußstutzen eingesetzt, die einen Anschluß des Plattenwärmetauschers 1 an ein Motor- oder1 Getriebegehäuse erlauben. Die Ausformungen 70 mit den Öffnungen 69 dienen der Befestigung des Plattenwärmetauschers 1 an den vorgenannten Motor- bzw. Getriebegehäusen. Fig. 10 shows a partial section through a plate heat exchanger 1 with a plurality of heat exchanger plates 3, a connection plate 2 and a coolant connection 9. The opening 12 'of the lowermost heat exchanger plate 3 is fluid-tightly sealed by a cover plate 71, whereas the opening 12 is arranged above a corresponding opening 72 of the cover plate 71, so that at this point a fluid passage is made possible. The cover plate 71 is in turn fluid-tightly connected to the insert 65, wherein the opening 64 'of the insert 65 is disposed on the openings 12 and 72 of the heat exchanger plate 3 and the cover plate 71. The peripheral edge 68 of the insert 65 is fluid-tightly connected to the cover plate 71 at its edges. The elevations 67 form with the cover plate 71 flow-conducting channels, through which a fluid flowing through mixed and to the openings 64, 64 'is passed. The underside of the insert 65 is fluid-tight and mechanically firmly connected to the end plate 66, in particular soldered. The end plate 66 has openings 64, 64 ', through which a fluid can flow. In these openings 64, 64 'connecting pieces are used, which allow a connection of the plate heat exchanger 1 to a motor or 1 gear housing. The formations 70 with the openings 69 are used to attach the plate heat exchanger 1 to the aforementioned engine or transmission housings.

Claims (7)

  1. Plate heat exchanger, especially oil/coolant cooler for combustion engines, comprising multiple, stacked heat exchanging plates, shaped like a vat and with a circumferential rim, an end plate with fittings for the supply and removal of a first fluid and with additional fittings for the supply and removal of a second fluid,
    wherein all heat exchanging plates (23) of the plate heat exchanger (1) are shaped rectangular and show the same shape and adjoining heat exchanging plates (3, 23) are rotated relative to one another about the vertical axis by 180° and the circumferential rim of a heat exchanging plate contacts the circumferential rim of an adjoining heat exchanging plate or contacts the circumferential rim of the end plate and is connected to the rim by sealing joining techniques, especially brazed, characterized in,
    a) that inserts for turbulence (4, 4') are arranged in the heat exchanging plates (3), and each heat exchanging plate (23) comprises four openings (26, 27),
    b) that two openings (26) on one longitudinal side are provided with protruding sections (25), which are arranged in a circle surrounding the opening (26),
    c) that the four openings form ducts for the first and the second fluid with the protruding sections and are connected with the four fittings (8, 9), and
    d) that the inserts for turbulence (4, 4') have openings (14, 14', 15, 15') with different diameters and that the protruding sections (25) of the heat exchanging plates (23) are fed through the bigger openings (15, 15').
  2. Plate heat exchanger according to claim 1, characterized in, that the cross section of the protruding sections (25, 45) exhibit the shape of an "U", approximately, wherein the basis of the "U"-shaped protruding section (25, 45) comprises a flattening (28, 48), which runs parallel to the surface of the heat exchanging plate (23, 43).
  3. Plate heat exchanger according to claim 2, characterized in, that the fittings (8) are inserted in the end plate (6), wherein the smooth nozzle (10) of the fitting (8) comprises a groove (11).
  4. Plate heat exchanger according to any of the claims 1 to 3, characterized in, that the plate heat exchanger (1) comprises a fastening plate (7), which comprises drillings, elongated holes or comparable devices, which can be used for fastening to another body.
  5. Plate heat exchanger according to any of the claims 3 to 4, characterized in, that the end plate (60) is furnished with mouldings (61) and openings (62) to fasten the plate heat exchanger (1) to another body.
  6. Plate heat exchanger according to any of the claims 3 to 5, characterized in, that an inserting part (65) and a cover plate (71) is inserted between the end plate (66) and the adjoining plate for heat exchange (3), wherein the cover plate (71) closes at least one opening (12') of the heat exchanging plate (3).
  7. Plate heat exchanger according to claim 6, characterized in, that the inserting part (65) comprises elevations (67) and a rim (68), which form ducts to direct a fluid flow and which are connected fluid-tight with the adjoining cover plate (71) and the end plate (66).
EP94107014A 1993-05-05 1994-05-04 Plate heat exchanger, especially oil cooler Expired - Lifetime EP0623798B2 (en)

Applications Claiming Priority (2)

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DE4314808 1993-05-05
DE4314808A DE4314808C2 (en) 1993-05-05 1993-05-05 Plate heat exchanger, in particular oil / coolant cooler

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EP0623798A2 EP0623798A2 (en) 1994-11-09
EP0623798A3 EP0623798A3 (en) 1995-06-28
EP0623798B1 EP0623798B1 (en) 1999-02-17
EP0623798B2 true EP0623798B2 (en) 2009-11-18

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EP0418227A1 (en) † 1987-05-29 1991-03-27 Alfa Laval Thermal Permanently joined plate heat exchanger.
DE9309741U1 (en) † 1993-06-30 1993-08-26 Filterwerk Mann & Hummel Gmbh, 71638 Ludwigsburg Heat exchanger

Also Published As

Publication number Publication date
ES2127309T3 (en) 1999-04-16
EP0623798B1 (en) 1999-02-17
DE4314808C2 (en) 2003-10-30
DE59407818D1 (en) 1999-03-25
EP0623798A2 (en) 1994-11-09
DE4314808A1 (en) 1994-11-10
EP0623798A3 (en) 1995-06-28

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