EP1890102B1 - Domed header plate for the tank of a heat exchanger - Google Patents

Domed header plate for the tank of a heat exchanger Download PDF

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Publication number
EP1890102B1
EP1890102B1 EP20070012127 EP07012127A EP1890102B1 EP 1890102 B1 EP1890102 B1 EP 1890102B1 EP 20070012127 EP20070012127 EP 20070012127 EP 07012127 A EP07012127 A EP 07012127A EP 1890102 B1 EP1890102 B1 EP 1890102B1
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EP
European Patent Office
Prior art keywords
header plate
tubes
axis
plate according
curvature
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EP20070012127
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German (de)
French (fr)
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EP1890102A1 (en
Inventor
Klaus Kalbacher
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Modine Manufacturing Co
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Modine Manufacturing Co
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Classifications

    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/08—Reinforcing means for header boxes

Definitions

  • the invention relates to a bottom part for a collecting box of a heat exchanger, e.g. a cooler, in particular oil cooler, with the other features in the preamble of claim 1.
  • a heat exchanger e.g. a cooler, in particular oil cooler
  • the bottom part also referred to as tube plate, for a collection box of this oil cooler consists of an at least partially flat flat part, which is designed approximately U-shaped in cross section.
  • a U-shaped in cross-section cover part is fastened such that it is received with its two-sided legs between side walls of the bottom part, wherein in this area a pressure-resistant connection between the bottom part and the lid part.
  • the bottom part contains openings for receiving Conssteckender pipes, which are in this case formed as flat tubes. In adaptation to the openings are approximately slit-shaped.
  • the flat part has at least one rounded region, namely in such a way that the flat central region merges on both sides via rounded side regions into the two side walls of the bottom part.
  • the slit-shaped openings for receiving and securing fashionsteckender flat tubes extending in the transverse direction over the central region.
  • the Tubes are juxtaposed to form spaces therebetween in which cooling fins are placed which enhance the heat exchange between the tubes and the medium to be cooled which flows through the tubes.
  • the tubes are pressure-tight in the openings of the bottom part, eg by soldering.
  • the collecting box is acted upon by a medium to be cooled, which flows through the tubes and can reach a second collecting box, the bottom part is pressurized, whereby the bottom part can deform such that it is bent in the direction of the tubes. Accordingly, the connections between the bottom part and the tubes are under heavy mechanical stress. These high mechanical loads can lead to damage, in particular leaks in the joints, and affect the life of such a designed heat exchanger.
  • a perforated plate for a tube heat exchanger DE 31 21 226 A1
  • the plate should generally have a curved or bulged or bent shape.
  • This is to be achieved in that, instead of such a perforated plate whose center region is approximately at the same height as the ends thereof, inclined surfaces adjoin the middle region on both sides, which project beyond the plane of the central region.
  • the middle region is connected via these inclined surfaces with U-shaped bent edges at its ends.
  • the middle area is essentially flat.
  • the perforated plate has a sag which progressively increases from its edges to the middle region. In this case, the plate on the side of the bundle of tubes, ie on the opposite side of the water tank, bent.
  • a heat exchanger with an approximately spherical collecting box in which the bottom part and the cover part of the collecting box are formed as part of a ball in order to better withstand the high internal pressure in the collecting box.
  • a heat exchanger with cylindrical tube header boxes known.
  • the cylinder tube has slots on the side facing the tubes, into which flat tubes are inserted. In each case between two slots with inserted flat tubes located surface area of the collection box tube is formed as a convex curved dome.
  • a collecting box which consists of lid and bottom part, the individual areas of the bottom part, which are located between slot openings for insertion of the tubes, designed as a convex curved to the tubes dome.
  • the invention has for its object to provide a bottom part for a header of a heat exchanger, e.g. for an oil cooler, which allows an increased strength of the flat part itself and also the connections between the flat part and pipes to be fastened thereto.
  • a heat exchanger e.g. for an oil cooler
  • a bottom part for a collecting box of a heat exchanger of the type mentioned according to the invention in that the flat part has a biaxially curved central part, which is about a longitudinal first axis and at the same time about a transverse, in particular approximately at right angles to the first Axis extending second axis is curved. It may be advantageous if the central part is curved in accordance with approximately a spherical cap.
  • curvature of the central part of a subsequent deformation of the flat part is already taken into account by pressure load; because the bottom part is connected to form a header box with a lid part and is the collection box with a medium under pressure Normally, a deformation of the flat part is to be expected under this medium pressure.
  • Such a deformation under pressure tends at least in sections to a ball. Due to the corresponding curved central part is already taken into account by Vorwegkrümmung. As a result, no deformation of the flat part or at least a considerably reduced deformation of the same result under pressure. As a result, the connections between the flat part and attached pipes are mechanically relieved considerably.
  • a bottom part 10 is shown, which is suitable for a collecting box of a heat exchanger 24, a part of which is schematically shown in FIG Fig. 4 is indicated.
  • the heat exchanger 24 is suitable, for example, for an internal combustion engine, in particular a motor vehicle. It can serve as a cooler, in particular, for example, as an oil cooler, or instead be integrated as a condenser or as an evaporator and, for example, in a refrigeration cycle.
  • the bottom part 10 consists of an at least partially flat flat part 11 with an in Fig. 1 to 3 upwardly facing side 12, on the flat part 11 a not further shown cover part, for example by soldering, welding od. Like. Can be fastened.
  • the flat portion 11 includes openings 13 which serve to receive therapeutically active devices 14, as is made Fig. 4 is apparent.
  • the flat part 11 has at least a rounded portion and is characterized in particular in that this flat part 11 has a curved central part 15, the biaxial, in particular corresponding to about a spherical cap, and thus z. B. spherical segment, curved.
  • the curved central part 15 is curved about a in the drawings only schematically indicated, longitudinally extending first axis 16 and at the same time about a transversely, in particular approximately at right angles, to the first axis 16 extending second axis 17.
  • the flat part 11 has in the embodiment shown approximately rectangular contour with an approximately parallel to the first axis 16 extending longitudinal side 18 and a transverse thereto, in particular approximately at right angles thereto, extending transverse side 19. Accordingly, the curved central portion 15 is approximately rectangular. Accordingly, an approximately parallel to the longitudinal side 18 of the flat part 11 extending longitudinal axis forms the first axis 16 and thereby the axis of curvature for the transverse curvature of the central part 15, as is apparent from Fig. 1 and in particular Fig. 3 you can see.
  • the radius of curvature for this transverse curvature is in Fig. 3 with r1, it being understood that the radius of curvature r1, relative to the other illustration in FIG Fig. 3 , not to scale.
  • Fig. 2 An approximately parallel to the transverse side 19 of the flat part 11 extending transverse axis forms the second axis 17 and is the axis of curvature for the longitudinal curvature of the central part 15.
  • the radius of curvature for this longitudinal curvature is in Fig. 2 schematically drawn with r2. It is understood that here too the size of the radius of curvature r2 in comparison to the representation of the flat part 11 is not to scale, since r2 in practice significantly larger than in the illustration according to FIG Fig. 2 is.
  • the radius of curvature r1 about the first axis 16 may be different from that of r2 about the second axis 17. Then results in the curved central portion 15 a deviating from a spherical portion biaxial curvature. Instead, the radius of curvature r1 about the first axis 16 may be the same as that r2 about the second axis. Then arises for the curvature of the central part 15 such as a spherical cap, d. H. a sphere section.
  • the transverse curvature of the curved central part 15 is approximately at the center of the longitudinal side 18 due to the longitudinal curvature largest, wherein the size of the curvature decreases from this center to both sides in the longitudinal direction.
  • the curved central part 15 is surrounded by a flat edge region 20 on the longitudinal side 18 and transverse side 19, which is not curved.
  • This flat edge region 20 has at least on one side, in particular on the side 12, approximately planar attachment surfaces 21, which serve for the attachment of a cover part thereto.
  • At least most of the openings 13 used to receive tubes 14 are contained in the curved central part 15.
  • the arrangement may be such that e.g. only the outermost edge 22 of the two longitudinally outermost openings 13, which is adjacent to the flat local edge region 20, has no transverse curvature about the first axis 16.
  • the arrangement can also be made such that only individual regions of the flat part 11 have a biaxial curvature and other regions only a uniaxial curvature, in particular transverse curvature.
  • Viewed in the longitudinal direction of the central part 15 can, for. B. at the beginning of a biaxial curved region are present, to which a uniaxially curved region, for. B. with transverse curvature, follows, then followed by a biaxially curved region.
  • the tubes 14 are formed as flat tubes.
  • the openings 13 are formed as a correspondingly adapted slots.
  • the slot profile of these openings 13 is directed transversely to the longitudinal side 18 and the first axis 16 of the curved central part 15.
  • At least some of these particular slot-shaped openings 13 are delimited by a passage 23, are created by the enlarged contact surfaces on the respective pipe 14 facing inside of the passage 23 and thus the strength and the guarantee of a tight connection between the flat part 11 and the individual tubes fourteenth is increased.
  • the passages 23 point towards the side 12 of the flat part 11, to which the cover part (not shown) is to be fastened. Thus, the passages 23 then protrude when the collecting box is formed toward its interior.
  • the passages 23 but also to the other, the side 12 opposite side point.
  • the passages 23 advantageously each have the same height, i. Instead, the passages 23, for example in the middle region of the central part 15, can also be higher than in the adjacent regions.
  • the height of the passages 23 may be e.g. starting from the middle on both sides in the longitudinal direction 18.
  • the flat part 11 represents an integral component and is formed, for example, of aluminum. The production takes place for example by injection molding or deep drawing.
  • the flat part 11 has a cross-sectional thickness of the order of about 0.8 to 6 mm.
  • the bottom part 10 is suitable for this and a cover part, not shown, which e.g. is placed on the mounting surfaces 21, a collecting box for a heat exchanger, e.g. for an oil cooler, to assemble.
  • the cover part not shown, on the flat, not curved edge portion 20 of the flat part 11, and in this case in particular on the flat mounting surfaces 21 of this, for. by welding, soldering od.
  • the cover part may also be formed of aluminum and preferably consists of a deep-drawn part.
  • Fig. 4 shows a portion of a heat exchanger 24 with at least one bottom part 10 to which a cover member, not shown, for attaching a header box is fastened, and with tubes 14 in the form of eg flat tubes, which are received in corresponding slit-shaped openings 13 in the bottom part 10 and pressure-tight by eg Soldering, welding od. Like. Are attached.
  • the fastening of the tubes 14 takes place at the openings 13 and the passages 23.
  • the bottom part 10 and / or the collector to be formed therefrom have the features described above. It can be seen that the tubes 14 despite the biaxial, z. B. approximately spherical segment, curved central portion 15 all have the same length.
  • tubes 14 protrude with their ends, which protrude beyond the flat portion 11 and are directed towards the interior of a collecting box to be formed on different levels over the bottom part 10 and protrude accordingly different far into the interior of a manner to be formed Collection box into it.
  • the tubes 14, which are located approximately in the region of the center of the central part 15, with their ends continue on the bottom part 10 than the remaining tubes 14, which connect in the longitudinal direction 18, starting from the center, on both sides. These adjoining on both sides of tubes 14 are end less than the bottom part 10 over than the tubes 14 in the region of the center.

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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)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Description

Die Erfindung bezieht sich auf einen Bodenteil für einen Sammelkasten eines Wärmeaustauschers, z.B. eines Kühlers, insbesondere Ölkühlers, mit den übrigen Merkmalen im Oberbegriff des Anspruchs 1.The invention relates to a bottom part for a collecting box of a heat exchanger, e.g. a cooler, in particular oil cooler, with the other features in the preamble of claim 1.

In der EP 0 526 687 A1 ist ein Ölkühler beschrieben, bei dem der Bodenteil, auch als Rohrboden bezeichnet, für einen Sammelkasten dieses Ölkühlers aus einem zumindest zum Teil ebenen Flachteil besteht, der im Querschnitt etwa U-förmig gestaltet ist. An diesem Flachteil ist ein im Querschnitt umgekehrt U-förmiger Deckelteil derart befestigbar, dass dieser mit seinen beidseitigen Schenkeln zwischen Seitenwänden des Bodenteils aufgenommen wird, wobei in diesem Bereich eine druckfeste Verbindung zwischen dem Bodenteil und dem Deckelteil geschieht. Der Bodenteil enthält Öffnungen zum Aufnehmen einzusteckender Rohre, die hierbei als Flachrohre ausgebildet sind. In Anpassung daran sind die Öffnungen etwa schlitzförmig. Der Flachteil hat zumindest einen gerundeten Bereich, nämlich in der Weise, dass der ebene Mittelbereich beidseitig über gerundete Seitenbereiche übergeht in die beiden Seitenwände des Bodenteils. Die schlitzförmigen Öffnungen zum Aufnehmen und Befestigen einzusteckender Flachrohre erstrecken sich in Querrichtung betrachtet über den Mittelbereich. Die Rohre sind nebeneinander angeordnet unter Bildung von Zwischenräumen dazwischen, in denen Kühlrippen platziert sind, die den Wärmeaustausch zwischen den Rohren und dem zu kühlenden Medium, das die Rohre durchfließt, verbessern. Die Rohre sind in den Öffnungen des Bodenteils druckdicht befestigt, z.B. durch Löten. Wird der Sammelkasten mit einem zu kühlenden Medium beaufschlagt, das die Rohre durchfließt und zu einem zweiten Sammelkasten gelangen kann, wird der Bodenteil mit Druck beaufschlagt, wodurch sich der Bodenteil derart verformen kann, dass er in Richtung zu den Rohren hin gebogen wird. Demgemäß stehen auch die Verbindungen zwischen dem Bodenteil und den Rohren unter starker mechanischer Beanspruchung. Diese hohen mechanischen Belastungen können zu Schäden, insbesondere Undichtigkeiten im Bereich der Verbindungen, führen und beeinträchtigen die Lebensdauer eines so gestalteten Wärmeaustauschers.In the EP 0 526 687 A1 an oil cooler is described in which the bottom part, also referred to as tube plate, for a collection box of this oil cooler consists of an at least partially flat flat part, which is designed approximately U-shaped in cross section. On this flat part, a U-shaped in cross-section cover part is fastened such that it is received with its two-sided legs between side walls of the bottom part, wherein in this area a pressure-resistant connection between the bottom part and the lid part. The bottom part contains openings for receiving einzusteckender pipes, which are in this case formed as flat tubes. In adaptation to the openings are approximately slit-shaped. The flat part has at least one rounded region, namely in such a way that the flat central region merges on both sides via rounded side regions into the two side walls of the bottom part. The slit-shaped openings for receiving and securing einzusteckender flat tubes extending in the transverse direction over the central region. The Tubes are juxtaposed to form spaces therebetween in which cooling fins are placed which enhance the heat exchange between the tubes and the medium to be cooled which flows through the tubes. The tubes are pressure-tight in the openings of the bottom part, eg by soldering. If the collecting box is acted upon by a medium to be cooled, which flows through the tubes and can reach a second collecting box, the bottom part is pressurized, whereby the bottom part can deform such that it is bent in the direction of the tubes. Accordingly, the connections between the bottom part and the tubes are under heavy mechanical stress. These high mechanical loads can lead to damage, in particular leaks in the joints, and affect the life of such a designed heat exchanger.

Es ist eine Lochplatte für einen Röhren-Wärmeaustauscher bekannt ( DE 31 21 226 A1 ), bei dem die Platte im allgemeinen eine gewölbte bzw. ausgebauchte oder durchgebogene Form haben soll. Dies soll dadurch erreicht sein, dass anstelle einer solchen Lochplatte, deren Mittelbereich etwa in der gleichen Höhe wie deren Enden liegt, sich beidseitig an den Mittelbereich geneigte Flächen anschließen, die über die Ebene des Mittelbereichs hinausragen. Der Mittelbereich ist über diese geneigten Flächen mit U-förmig gebogenen Rändern an seinen Enden verbunden. Der Mittelbereich ist im wesentlichen eben. Erwähnt ist hierbei auch, dass die Lochplatte eine Durchbiegung aufweist, die progressiv von ihren Rändern zum Mittelbereich größer wird. Dabei ist die Platte auf der Seite der Bündel von Rohren, d.h. auf der dem Wasserkasten gegenüberliegenden Seite, durchgebogen. Hiermit ist eine Krümmung um eine in Längsrichtung und parallel zur Längserstreckung der Lochplatte verlaufende Achse angesprochen. Auch bei einem anderen bekannten Wärmeaustauscher ( US-A-4 207 944 ) ist der eine Teil eines Sammelkastens, nämlich dessen Bodenteil, um eine längs verlaufende Achse etwa halbzylinderförmig gekrümmt. Auch aus DE 40 04 949 A1 und JP 2005308366 A ist ein Sammelkasten für einen Wärmeaustauscher bekannt, dessen Bodenteil um eine längs und etwa parallel zum Längsverlauf des Sammelkastens verlaufende Achse gekrümmt ist. Aus der GB-A-1 016 251 ist ein Wärmeaustauscher mit einem etwa kugelförmigen Sammelkasten bekannt, bei dem der Bodenteil und der Deckelteil des Sammelkastens als Teil einer Kugel ausgebildet sind, um dem hohen Innendruck im Sammelkasten besser zu widerstehen. Aus der EP-A-0 198 581 ist ein Wärmeaustauscher mit zylinderrohrförmigen Sammelkästen bekannt. Das Zylinderrohr weist auf der den Rohren zugewandten Seite Schlitze auf, in die Flachrohre eingesteckt sind. Ein jeweils zwischen zwei Schlitzen mit eingesteckten Flachrohren befindlicher Flächenbereich des Sammelkastenrohres ist als konvex gekrümmter Dom ausgebildet. Bei einem Sammelkasten, der aus Deckel und Bodenteil besteht, sind die einzelnen Bereiche des Bodenteils, die sich zwischen Schlitzöffnungen zum Einstecken der Rohre befinden, als zu den Rohren hin konvex gekrümmte Dome gestaltet.It is known a perforated plate for a tube heat exchanger ( DE 31 21 226 A1 ), in which the plate should generally have a curved or bulged or bent shape. This is to be achieved in that, instead of such a perforated plate whose center region is approximately at the same height as the ends thereof, inclined surfaces adjoin the middle region on both sides, which project beyond the plane of the central region. The middle region is connected via these inclined surfaces with U-shaped bent edges at its ends. The middle area is essentially flat. It is also mentioned here that the perforated plate has a sag which progressively increases from its edges to the middle region. In this case, the plate on the side of the bundle of tubes, ie on the opposite side of the water tank, bent. Hereby, a curvature is addressed about an axis extending in the longitudinal direction and parallel to the longitudinal extent of the perforated plate. Also in another known heat exchanger ( US-A-4,207,944 ) is the one part of a collecting tank, namely its bottom part, about a longitudinal axis curved approximately semicylindrical. Also from DE 40 04 949 A1 and JP 2005308366 A is a collection box for a heat exchanger known, the bottom part is curved about a longitudinal axis and approximately parallel to the longitudinal course of the collecting tank axis. From the GB-A-1 016 251 For example, a heat exchanger with an approximately spherical collecting box is known in which the bottom part and the cover part of the collecting box are formed as part of a ball in order to better withstand the high internal pressure in the collecting box. From the EP-A-0 198 581 is a heat exchanger with cylindrical tube header boxes known. The cylinder tube has slots on the side facing the tubes, into which flat tubes are inserted. In each case between two slots with inserted flat tubes located surface area of the collection box tube is formed as a convex curved dome. In a collecting box, which consists of lid and bottom part, the individual areas of the bottom part, which are located between slot openings for insertion of the tubes, designed as a convex curved to the tubes dome.

Der Erfindung liegt die Aufgabe zugrunde, einen Bodenteil für einen Sammelkasten eines Wärmeaustauschers, z.B. für einen Ölkühler, zu schaffen, der eine gesteigerte Festigkeit des Flachteils selbst ermöglicht und außerdem auch der Verbindungen zwischen dem Flachteil und daran zu befestigenden Rohren.The invention has for its object to provide a bottom part for a header of a heat exchanger, e.g. for an oil cooler, which allows an increased strength of the flat part itself and also the connections between the flat part and pipes to be fastened thereto.

Die Aufgabe ist bei einem Bodenteil für einen Sammelkasten eines Wärmeaustauschers der eingangs genannten Art gemäß der Erfindung dadurch gelöst, dass der Flachteil einen zweiachsig gekrümmten Zentralteil aufweist, der um eine längs verlaufende erste Achse und zugleich auch um eine quer, insbesondere etwa rechtwinklig, zur ersten Achse verlaufende zweite Achse gekrümmt ist. Von Vorteil kann es sein, wenn der Zentralteil entsprechend etwa einer Kugelkalotte gekrümmt ist. Mit einer derartigen zweiachsigen, insbesondere etwa kugelabschnittförmigen, Krümmung des Zentralteils wird einer späteren Verformung des Flachteils bei Druckbelastung bereits vorweg Rechnung getragen; denn ist der Bodenteil zur Bildung eines Sammelkastens mit einem Deckelteil verbunden und wird der Sammelkasten mit einem Medium unter Druck beaufschlagt, so ist normalerweise eine Verformung des Flachteils unter diesem Mediumdruck zu erwarten. Eine derartige Verformung unter Druckbelastung tendiert zumindest abschnittweise zu einer Kugel. Aufgrund des entsprechend gekrümmten Zentralteils ist dem durch Vorwegkrümmung bereits Rechnung getragen. Dies führt dazu, dass sich unter Druckbelastung keine Verformung des Flachteils oder zumindest eine erheblich reduzierte Verformung dieses ergibt. Daraus resultiert, dass die Verbindungen zwischen dem Flachteil und daran befestigten Rohren mechanisch erheblich entlastet sind. Aufgrund des entsprechend gekrümmten Zentralteils lässt sich zumindest in Grenzen ein fast idealer Zustand erreichen, bei dem bei Belastung des Flachteils sonst herrschende Biegespannungen aufgrund der zweiachsigen, z. B. etwa kugelabschnittförmigen, Krümmung in Zugspannungen umgewandelt sind, wodurch eine größere Festigkeit des Flachteils selbst und der Verbindungen zwischen diesem und den Rohren erreicht wird. Da die Festigkeit des Flachteils und der Verbindungen zwischen diesem und den Rohren vom Äußeren des Flachteils zur Mitte hin abnimmt, wird besonders im mittleren Bereich des Flachteils durch den zweiachsig, z. B. etwa kugelabschnittförmig, gekrümmten Zentralteil diesem Rechnung getragen und die Festigkeit des Flachteils im mittleren Bereich entsprechend gesteigert. Aufgrund dieser gesteigerten Festigkeit ist es möglich, die Querschnittsdicke des Bodenteils und/oder der Rohre weiter zu reduzieren und somit zu einer Gewichts- und Kostenersparnis zu gelangen. Die gesteigerte mechanische Festigkeit steigert zugleich die Lebensdauer eines unter Verwendung des erfindungsgemäßen Bodenteils gebildeten Sammelkastens und eines dementsprechend gestalteten Wärmeaustauschers. Dies bedingt keinen Mehraufwand hinsichtlich des Materials, der Bauteilzahl und der einzelnen Fertigungsstufen. Vorteilhaft ist ferner, dass reproduzierbar und dauerhaft dichte Verbindungen zwischen dem Bodenteil und den einzelnen Rohren bei geringen Fertigungstoleranzen möglich sind.The object is achieved in a bottom part for a collecting box of a heat exchanger of the type mentioned according to the invention in that the flat part has a biaxially curved central part, which is about a longitudinal first axis and at the same time about a transverse, in particular approximately at right angles to the first Axis extending second axis is curved. It may be advantageous if the central part is curved in accordance with approximately a spherical cap. With such a biaxial, in particular approximately spherical section-shaped, curvature of the central part of a subsequent deformation of the flat part is already taken into account by pressure load; because the bottom part is connected to form a header box with a lid part and is the collection box with a medium under pressure Normally, a deformation of the flat part is to be expected under this medium pressure. Such a deformation under pressure tends at least in sections to a ball. Due to the corresponding curved central part is already taken into account by Vorwegkrümmung. As a result, no deformation of the flat part or at least a considerably reduced deformation of the same result under pressure. As a result, the connections between the flat part and attached pipes are mechanically relieved considerably. Due to the correspondingly curved central part can be reached, at least within limits, an almost ideal state in which under loading of the flat part otherwise prevailing bending stresses due to the biaxial, z. B. about spherical segment, curvature are converted into tensile stresses, whereby a greater strength of the flat part itself and the connections between this and the tubes is achieved. Since the strength of the flat part and the connections between this and the tubes from the exterior of the flat part towards the center decreases, especially in the central region of the flat part by the biaxial, z. B. approximately spherical segment-shaped, curved central part carried this bill and increased the strength of the flat part in the middle region accordingly. Due to this increased strength, it is possible to further reduce the cross-sectional thickness of the bottom part and / or the tubes and thus to achieve a weight and cost savings. The increased mechanical strength increases at the same time the life of a collecting box formed using the bottom part according to the invention and a correspondingly designed heat exchanger. This does not require additional expenditure with regard to the material, the number of components and the individual production stages. A further advantage is that reproducible and permanently tight connections between the bottom part and the individual tubes are possible with low manufacturing tolerances.

Weitere besondere Erfindungsmerkmale und Ausgestaltungen enthalten die Unteransprüche.Other particular features of the invention and embodiments include the dependent claims.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung.Further details and advantages of the invention will become apparent from the following description.

Der vollständige Wortlaut der Ansprüche ist vorstehend allein zur Vermeidung unnötiger Wiederholungen nicht wiedergegeben, sondern statt dessen lediglich durch Hinweis auf die Ansprüche darauf Bezug genommen, wodurch jedoch alle diese Anspruchsmerkmale als an dieser Stelle ausdrücklich und erfindungswesentlich offenbart zu gelten haben. Dabei sind alle in der vorstehenden und folgenden Beschreibung erwähnten Merkmale sowie auch die allein aus den Zeichnungen entnehmbaren Merkmale weitere Bestandteile der Erfindung, auch wenn sie nicht besonders hervorgehoben und insbesondere nicht in den Ansprüchen erwähnt sind.The full text of the claims is not reproduced above solely to avoid unnecessary repetition, but instead referred to merely by reference to the claims on it, which, however, all of these claim characteristics have to be considered as explicit and essential to the invention at this point. Here are all mentioned in the preceding and following description features as well as the removable only from the drawings features further components of the invention, even if they are not particularly highlighted and in particular not mentioned in the claims.

Die Erfindung ist nachfolgend anhand eines in den Zeichnungen gezeigten Ausführungsbeispieles näher erläutert. Es zeigen:

Fig. 1
eine schematische perspektivische Ansicht eines Bodenteils für einen Sammelkasten eines Wärmeaustauschers,
Fig. 2
einen schematischen Längsschnitt des Bodenteils entlang der Linie II - II in Fig. 1,
Fig. 3
einen schematischen Querschnitt des Bodenteils entlang der Linie III - III in Fig. 2,
Fig. 4
eine schematische perspektivische Ansicht eines Teils eines Wärmeaustauschers mit einem Bodenteil entsprechend Fig. 1 bis 3.
The invention is explained in more detail with reference to an embodiment shown in the drawings. Show it:
Fig. 1
a schematic perspective view of a bottom part for a collecting box of a heat exchanger,
Fig. 2
a schematic longitudinal section of the bottom part along the line II - II in Fig. 1 .
Fig. 3
a schematic cross section of the bottom part along the line III - III in Fig. 2 .
Fig. 4
a schematic perspective view of a portion of a heat exchanger with a bottom part accordingly Fig. 1 to 3 ,

In den Zeichnungen ist ein Bodenteil 10 gezeigt, der für einen Sammelkasten eines Wärmeaustauschers 24 geeignet ist, von dem ein Teil schematisch in Fig. 4 angedeutet ist. Der Wärmeaustauscher 24 ist beispielsweise für eine Brennkraftmaschine, insbesondere eines Kraftfahrzeuges, geeignet. Er kann als Kühler, insbesondere z.B. als Ölkühler, dienen oder statt dessen als Kondensator oder als Verdampfer und hierbei z.B. in einen Kältekreislauf eingebunden werden.In the drawings, a bottom part 10 is shown, which is suitable for a collecting box of a heat exchanger 24, a part of which is schematically shown in FIG Fig. 4 is indicated. The heat exchanger 24 is suitable, for example, for an internal combustion engine, in particular a motor vehicle. It can serve as a cooler, in particular, for example, as an oil cooler, or instead be integrated as a condenser or as an evaporator and, for example, in a refrigeration cycle.

Der Bodenteil 10 besteht aus einem zumindest zum Teil ebenen Flachteil 11 mit einer in Fig. 1 bis 3 nach oben weisenden Seite 12, an der am Flachteil 11 ein nicht weiter gezeigter Deckelteil z.B. durch Löten, Schweißen od. dgl. befestigbar ist. Der Flachteil 11 enthält Öffnungen 13, die zum Aufnehmen einzusteckender Rohre 14 dienen, wie dies aus Fig. 4 ersichtlich ist. Der Flachteil 11 weist zumindest einen gerundeten Bereich auf und ist im Besonderen dadurch gekennzeichnet, dass dieser Flachteil 11 einen gekrümmten Zentralteil 15 aufweist, der zweiachsig, insbesondere entsprechend etwa einer Kugelkalotte, und somit z. B. kugelabschnittförmig, gekrümmt ist. Mit einer solchen Krümmung des Zentralteils 15 wird einer späteren Verformung des Flachteils 11 bereits vorweg Rechnung getragen; denn ist der Bodenteil 10 zur Bildung eines Sammelkastens mit einem Deckelteil verbunden und wird der Sammelkasten mit einem Medium beaufschlagt, so ist eine Verformung des Flachteils 11 unter dem Mediumdruck zu erwarten. Eine derartige Verformung unter Druckbelastung tendiert zumindest abschnittsweise zu einer Kugel. Aufgrund des etwa zweiachsig, insbesondere entsprechend einer Kugelkalotte, gekrümmten Zentralteils 15 ist durch Vorwegkrümmung dem Rechnung getragen mit dem Resultat, dass sich unter Druckbelastung keine Verformung des Flachteils 11 oder zumindest eine wesentlich reduzierte Verformung dieses ergibt. Dies führt dazu, dass die Verbindungen zwischen den eingesetzten Rohren 14 und dem Flachteil 11 mechanisch erheblich entlastet sind. Aufgrund des entsprechend gekrümmten Zentralteils 15 lässt sich zumindest in Grenzen ein Idealzustand erreichen, bei dem bei Belastung des Flachteils 11 sonst herrschende Biegespannungen aufgrund dieser Krümmung in Zugspannungen umgewandelt sind, wodurch eine größere Festigkeit des Flachteils 11 selbst und der genannten Verbindungen zwischen dem Flachteil 11 und den Rohren 14 erreicht wird. Da die Festigkeit des Flachteils 11 und der Verbindungen zwischen dem Flachteil 11 und den Rohren 14 beim Flachteil 11 von außen nach innen abnimmt, wird besonders im mittleren Bereich des Flachteils 11 durch den gekrümmten Zentralteil 15 dem Rechnung getragen und die Festigkeit des Flachteils 11 im mittleren Bereich entsprechend gesteigert.The bottom part 10 consists of an at least partially flat flat part 11 with an in Fig. 1 to 3 upwardly facing side 12, on the flat part 11 a not further shown cover part, for example by soldering, welding od. Like. Can be fastened. The flat portion 11 includes openings 13 which serve to receive einzusteckender tubes 14, as is made Fig. 4 is apparent. The flat part 11 has at least a rounded portion and is characterized in particular in that this flat part 11 has a curved central part 15, the biaxial, in particular corresponding to about a spherical cap, and thus z. B. spherical segment, curved. With such a curvature of the central part 15 a later deformation of the flat part 11 is already taken into account in advance; because the bottom part 10 is connected to form a collecting tank with a cover part and the collecting tank is subjected to a medium, so a deformation of the flat part 11 is to be expected under the medium pressure. Such a deformation under pressure tends at least in sections to a ball. Due to the approximately biaxial, in particular according to a spherical cap, curved central part 15 is borne by Vorwegkrümmung the bill with the result that under pressure loading no deformation of the flat part 11 or at least a significantly reduced deformation results. This leads to the fact that the connections between the inserted tubes 14 and the flat part 11 are mechanically relieved considerably. Due to the correspondingly curved central part 15, an ideal state can be achieved, at least within limits when the flat part 11 is loaded Bending stresses due to this curvature are converted into tensile stresses, whereby a greater strength of the flat part 11 itself and said connections between the flat part 11 and the tubes 14 is achieved. Since the strength of the flat part 11 and the connections between the flat part 11 and the tubes 14 decreases in the flat part 11 from outside to inside, especially in the central region of the flat part 11 is supported by the curved central part 15 and the strength of the flat part 11 in the middle Increased accordingly area.

Der gekrümmte Zentralteil 15 ist um eine in den Zeichnungen nur schematisch angedeutete, längs verlaufende erste Achse 16 und zugleich auch um eine quer, insbesondere etwa rechtwinklig, zur ersten Achse 16 verlaufende zweite Achse 17 gekrümmt. Der Flachteil 11 hat beim gezeigten Ausführungsbeispiel etwa rechteckige Kontur mit einer etwa parallel zur ersten Achse 16 verlaufenden Längsseite 18 und einer quer dazu, insbesondere etwa rechtwinklig dazu, verlaufenden Querseite 19. Dementsprechend ist auch der gekrümmte Zentralteil 15 etwa rechteckig. Demgemäß bildet eine etwa parallel zur Längsseite 18 des Flachteils 11 verlaufende Längsachse die erste Achse 16 und dabei die Krümmungsachse für die Querkrümmung des Zentralteils 15, wie dies aus Fig. 1 und insbesondere aus Fig. 3 zu sehen ist. Der Krümmungsradius für diese Querkrümmung ist in Fig. 3 mit r1 bezeichnet, wobei es sich versteht, dass der Krümmungsradius r1, bezogen auf die sonstige Darstellung in Fig. 3, nicht maßstäblich ist.The curved central part 15 is curved about a in the drawings only schematically indicated, longitudinally extending first axis 16 and at the same time about a transversely, in particular approximately at right angles, to the first axis 16 extending second axis 17. The flat part 11 has in the embodiment shown approximately rectangular contour with an approximately parallel to the first axis 16 extending longitudinal side 18 and a transverse thereto, in particular approximately at right angles thereto, extending transverse side 19. Accordingly, the curved central portion 15 is approximately rectangular. Accordingly, an approximately parallel to the longitudinal side 18 of the flat part 11 extending longitudinal axis forms the first axis 16 and thereby the axis of curvature for the transverse curvature of the central part 15, as is apparent from Fig. 1 and in particular Fig. 3 you can see. The radius of curvature for this transverse curvature is in Fig. 3 with r1, it being understood that the radius of curvature r1, relative to the other illustration in FIG Fig. 3 , not to scale.

Eine etwa parallel zur Querseite 19 des Flachteils 11 verlaufende Querachse bildet die zweite Achse 17 und ist die Krümmungsachse für die Längskrümmung des Zentralteils 15. Der Krümmungsradius für diese Längskrümmung ist in Fig. 2 schematisch mit r2 eingezeichnet. Es versteht sich, dass auch hier die Größe des Krümmungsradius r2 im Vergleich zur Darstellung des Flachteils 11 nicht maßstäblich ist, da r2 in der Praxis deutlich größer als in der Darstellung gemäß Fig. 2 ist.An approximately parallel to the transverse side 19 of the flat part 11 extending transverse axis forms the second axis 17 and is the axis of curvature for the longitudinal curvature of the central part 15. The radius of curvature for this longitudinal curvature is in Fig. 2 schematically drawn with r2. It is understood that here too the size of the radius of curvature r2 in comparison to the representation of the flat part 11 is not to scale, since r2 in practice significantly larger than in the illustration according to FIG Fig. 2 is.

Der Krümmungsradius r1 um die erste Achse 16 kann ein anderer sein als derjenige r2 um die zweite Achse 17. Dann ergibt sich beim gekrümmten Zentralteil 15 eine von einem Kugelabschnitt abweichende zweiachsige Krümmung. Statt dessen kann der Krümmungsradius r1 um die erste Achse 16 der gleiche sein wie derjenige r2 um die zweite Achse. Dann ergibt sich für die Krümmung des Zentralteils 15 etwa eine solche einer Kugelkalotte, d. h. eines Kugelabschnitts.The radius of curvature r1 about the first axis 16 may be different from that of r2 about the second axis 17. Then results in the curved central portion 15 a deviating from a spherical portion biaxial curvature. Instead, the radius of curvature r1 about the first axis 16 may be the same as that r2 about the second axis. Then arises for the curvature of the central part 15 such as a spherical cap, d. H. a sphere section.

Wie insbesondere aus Fig. 2 und 3 ersichtlich ist, ist die Querkrümmung des gekrümmten Zentralteils 15 etwa im Bereich der Mitte der Längsseite 18 aufgrund der Längskrümmung am größten, wobei die Größe der Krümmung ausgehend von dieser Mitte zu beiden Seiten in Längsrichtung abnimmt.As in particular from Fig. 2 and 3 As can be seen, the transverse curvature of the curved central part 15 is approximately at the center of the longitudinal side 18 due to the longitudinal curvature largest, wherein the size of the curvature decreases from this center to both sides in the longitudinal direction.

Der gekrümmte Zentralteil 15 ist von einem ebenen Randbereich 20 auf der Längsseite 18 und Querseite 19 umrandet, der nicht gekrümmt ist. Dieser ebene Randbereich 20 weist zumindest auf einer Seite, insbesondere auf der Seite 12, etwa ebene Befestigungsflächen 21 auf, die für die Befestigung eines Deckelteils daran dienen.The curved central part 15 is surrounded by a flat edge region 20 on the longitudinal side 18 and transverse side 19, which is not curved. This flat edge region 20 has at least on one side, in particular on the side 12, approximately planar attachment surfaces 21, which serve for the attachment of a cover part thereto.

Zumindest die meisten Öffnungen 13, die zum Aufnehmen von Rohren 14 dienen, sind im gekrümmten Zentralteil 15 enthalten. Je nach Gestaltung kann dabei die Anordnung so getroffen sein, dass z.B. lediglich der äußerste Rand 22 der beiden in Längsrichtung äußersten Öffnungen 13, der dem ebenen dortigen Randbereich 20 benachbart ist, keine Querkrümmung um die erste Achse 16 aufweist.At least most of the openings 13 used to receive tubes 14 are contained in the curved central part 15. Depending on the design, the arrangement may be such that e.g. only the outermost edge 22 of the two longitudinally outermost openings 13, which is adjacent to the flat local edge region 20, has no transverse curvature about the first axis 16.

Die Anordnung kann auch so getroffen sein, dass nur einzelne Bereiche des Flachteils 11 eine zweiachsige Krümmung und andere Bereiche nur eine einachsige Krümmung, insbesondere Querkrümmung, aufweisen. In Längsrichtung des Zentralteils 15 betrachtet kann z. B. am Beginn ein zweiachsig gekrümmter Bereich vorliegen, auf den ein einachsig gekrümmter Bereich, z. B. mit Querkrümmung, folgt, an den sich dann ein zweiachsig gekrümmter Bereich anschließt.The arrangement can also be made such that only individual regions of the flat part 11 have a biaxial curvature and other regions only a uniaxial curvature, in particular transverse curvature. Viewed in the longitudinal direction of the central part 15 can, for. B. at the beginning of a biaxial curved region are present, to which a uniaxially curved region, for. B. with transverse curvature, follows, then followed by a biaxially curved region.

Beim gezeigten Ausführungsbeispiel sind die Rohre 14 als Flachrohre ausgebildet. In Anpassung daran sind die Öffnungen 13 als entsprechend angepasste Schlitze ausgebildet. Der Schlitzverlauf dieser Öffnungen 13 ist quer zur Längsseite 18 und zur ersten Achse 16 des gekrümmten Zentralteils 15 gerichtet. Zumindest einige dieser insbesondere schlitzförmigen Öffnungen 13 sind von einem Durchzug 23 begrenzt, durch die vergrößerte Anlageflächen auf der dem jeweiligen Rohr 14 zugewandten Innenseite des Durchzuges 23 geschaffen sind und damit die Festigkeit und die Gewähr einer dichten Verbindung zwischen dem Flachteil 11 und den einzelnen Rohren 14 erhöht wird. Mit Vorzug weisen die Durchzüge 23 zu der Seite 12 des Flachteils 11 hin, an der der nicht gezeigte Deckelteil zu befestigen ist. Somit stehen die Durchzüge 23 dann bei gebildetem Sammelkasten zu dessen Inneren hin vor. Bei einem anderen, nicht gezeigten Ausführungsbeispiel können die Durchzüge 23 aber auch zur anderen, der Seite 12 gegenüberliegenden Seite hin weisen. Die Durchzüge 23 haben vorteilhaft allesamt jeweils die gleiche Höhe, d.h. den gleich großen Überstand über den dazwischen befindlichen Flächenbereich des Zentralteils 15. Statt dessen können die Durchzüge 23 z.B im mittleren Bereich des Zentralteils 15 auch höher als bei den angrenzenden Bereichen sein. Die Höhe der Durchzüge 23 kann z.B. ausgehend von der Mitte zu beiden Seiten in Längsrichtung 18 abnehmen.In the embodiment shown, the tubes 14 are formed as flat tubes. In adaptation to the openings 13 are formed as a correspondingly adapted slots. The slot profile of these openings 13 is directed transversely to the longitudinal side 18 and the first axis 16 of the curved central part 15. At least some of these particular slot-shaped openings 13 are delimited by a passage 23, are created by the enlarged contact surfaces on the respective pipe 14 facing inside of the passage 23 and thus the strength and the guarantee of a tight connection between the flat part 11 and the individual tubes fourteenth is increased. With preference, the passages 23 point towards the side 12 of the flat part 11, to which the cover part (not shown) is to be fastened. Thus, the passages 23 then protrude when the collecting box is formed toward its interior. In another, not shown embodiment, the passages 23 but also to the other, the side 12 opposite side point. The passages 23 advantageously each have the same height, i. Instead, the passages 23, for example in the middle region of the central part 15, can also be higher than in the adjacent regions. The height of the passages 23 may be e.g. starting from the middle on both sides in the longitudinal direction 18.

Der Flachteil 11 stellt ein einstückiges Bauteil dar und ist z.B. aus Aluminium gebildet. Die Herstellung erfolgt z.B. durch Spritzgießen oder Tiefziehen. Der Flachteil 11 weist eine Querschnittsdicke in der Größenordnung von etwa 0,8 bis 6 mm auf.The flat part 11 represents an integral component and is formed, for example, of aluminum. The production takes place for example by injection molding or deep drawing. The flat part 11 has a cross-sectional thickness of the order of about 0.8 to 6 mm.

Der Bodenteil 10 ist dafür geeignet, aus diesem und einem nicht gezeigten Deckelteil, der z.B. auf die Befestigungsflächen 21 aufgesetzt wird, einen Sammelkasten für einen Wärmeaustauscher, z.B. für einen Ölkühler, zusammenzusetzen. Dabei wird der nicht gezeigte Deckelteil am ebenen, nicht gekrümmten Randbereich 20 des Flachteils 11, und hierbei insbesondere an den ebenen Befestigungsflächen 21 dieses, z.B. durch Schweißen, Löten od. dgl., druckdicht befestigt. Der Deckelteil kann ebenfalls aus Aluminium gebildet sein und besteht vorzugsweise aus einem Tiefziehteil.The bottom part 10 is suitable for this and a cover part, not shown, which e.g. is placed on the mounting surfaces 21, a collecting box for a heat exchanger, e.g. for an oil cooler, to assemble. In this case, the cover part, not shown, on the flat, not curved edge portion 20 of the flat part 11, and in this case in particular on the flat mounting surfaces 21 of this, for. by welding, soldering od. Like., Pressure-tight. The cover part may also be formed of aluminum and preferably consists of a deep-drawn part.

Fig. 4 zeigt einen Teil eines Wärmeaustauschers 24 mit mindestens einem Bodenteil 10, an dem ein nicht gezeigter Deckelteil zur Bildung eines Sammelkastens befestigbar ist, und mit Rohren 14 in Form z.B. von Flachrohren, die in entsprechend schlitzförmig gestalteten Öffnungen 13 im Bodenteil 10 aufgenommen und druckdicht durch z.B. Löten, Schweißen od. dgl. befestigt sind. Hierbei erfolgt die Befestigung der Rohre 14 an den Öffnungen 13 und den Durchzügen 23. Der Bodenteil 10 und/oder der daraus zu bildende Sammelkasten weisen die vorstehend beschriebenen Merkmale auf. Man erkennt, dass die Rohre 14 trotz des zweiachsig, z. B. etwa kugelabschnittförmig, gekrümmten Zentralteils 15 alle die gleiche Länge aufweisen. Die in den Öffnungen 13 aufgenommenen Rohre 14 ragen mit ihren Enden, die über den Flachteil 11 überstehen und zum Inneren eines zu bildenden Sammelkastens gerichtet sind, unterschiedlich weit über den Bodenteil 10 über und ragen dementsprechend unterschiedlich weit in das Innere eines in beschriebener Weise zu bildenden Sammelkastens hinein. Die Rohre 14, die sich etwa im Bereich der Mitte des Zentralteils 15 befinden, stehen mit ihren Enden weiter über den Bodenteil 10 über als die übrigen Rohre 14, die sich in Längsrichtung 18, ausgehend von der Mitte, zu beiden Seiten anschließen. Diese sich zu beiden Seiten anschließenden Rohre 14 stehen endseitig weniger weit über den Bodenteil 10 über als die Rohre 14 im Bereich der Mitte. Auch dadurch wird eine Steigerung der Festigkeit erreicht; denn die Festigkeit des Flachteils 11 und der Verbindungen zwischen diesem und den Rohren 14 ist im Bereich der Enden des Bodenteils 10 größer als im Bereich der Mitte. Die Festigkeit nimmt von außen zur Mitte hin ab. Da aufgrund gleich langer Rohre 14 diese nun im Bereich etwa der Mitte des gekrümmten Zentralteils 15 weiter überstehen als zu beiden Seiten, in Längsrichtung 18 betrachtet, ergibt sich in diesem mittleren Bereich ein größeres Widerstandsmoment, wodurch die Festigkeit gesteigert wird. Fig. 4 shows a portion of a heat exchanger 24 with at least one bottom part 10 to which a cover member, not shown, for attaching a header box is fastened, and with tubes 14 in the form of eg flat tubes, which are received in corresponding slit-shaped openings 13 in the bottom part 10 and pressure-tight by eg Soldering, welding od. Like. Are attached. Here, the fastening of the tubes 14 takes place at the openings 13 and the passages 23. The bottom part 10 and / or the collector to be formed therefrom have the features described above. It can be seen that the tubes 14 despite the biaxial, z. B. approximately spherical segment, curved central portion 15 all have the same length. The recorded in the openings 13 tubes 14 protrude with their ends, which protrude beyond the flat portion 11 and are directed towards the interior of a collecting box to be formed on different levels over the bottom part 10 and protrude accordingly different far into the interior of a manner to be formed Collection box into it. The tubes 14, which are located approximately in the region of the center of the central part 15, with their ends continue on the bottom part 10 than the remaining tubes 14, which connect in the longitudinal direction 18, starting from the center, on both sides. These adjoining on both sides of tubes 14 are end less than the bottom part 10 over than the tubes 14 in the region of the center. This also achieves an increase in strength; because the strength of the flat part 11 and the connections between this and the tubes 14 is greater in the region of the ends of the bottom part 10 as in the area of the middle. The strength decreases from the outside towards the middle. Since due to the same length of tubes 14 these now in the range about the center of the curved central portion 15 survive further than on both sides, viewed in the longitudinal direction 18, results in this central region a larger moment of resistance, whereby the strength is increased.

Durch die besondere Gestaltung des Bodenteils 10, eines unter Verwendung eines solchen Bodenteils 10 herstellbaren Sammelkastens für einen Wärmeaustauscher und eines Wärmeaustauschers 24 wird eine Steigerung der Festigkeit sowohl des Bodenteils 10 als auch der Verbindungen zwischen diesem und den Rohren 14 erreicht. Dies macht es möglich, ggf. die Querschnittsdicke der einzelnen Bauteile weiter zu reduzieren und somit zu einer Gewichts- und Kostenersparnis zu gelangen. Aufgrund der Steigerung der mechanischen Festigkeit wird auch die Lebensdauer eines unter Verwendung des beschriebenen Bodenteils 10 gebildeten Sammelkastens und eines dementsprechend gestalteten Wärmeaustauschers 24 erhöht, wobei dies keinen Mehraufwand hinsichtlich des Materials, der Bauteilzahl und der einzelnen Fertigungsstufen bedingt. Von Vorteil ist ferner, dass reproduzierbar und dauerhaft dichte Verbindungen zwischen dem Bodenteil 10 und den Rohren 14 bei geringen Fertigungstoleranzen erzielt werden.Due to the special design of the bottom part 10, a producible using such a bottom part 10 header tank for a heat exchanger and a heat exchanger 24, an increase in the strength of both the bottom part 10 and the connections between this and the tubes 14 is achieved. This makes it possible, if necessary, to further reduce the cross-sectional thickness of the individual components and thus to achieve weight and cost savings. Due to the increase in mechanical strength, the life of a collecting box formed using the described bottom portion 10 and a correspondingly designed heat exchanger 24 is increased, which does not require additional expenditure with regard to the material, the number of components and the individual production stages. A further advantage is that reproducible and permanently tight connections between the bottom part 10 and the tubes 14 are achieved with low manufacturing tolerances.

Claims (26)

  1. Header plate for the tank of a heat exchanger, consisting of an at least partially planar flat part (11), to which a cover part can be fastened and which contains orifices (13) for the reception of tubes (14) to be plugged in, the flat part (11) having at least one rounded region, characterized in that the flat part (11) has a biaxially curved central part (15) which is curved about a longitudinally running first axis (16) and at the same time also about a second axis (17) running transversely, in particular approximately at right angles, to the first axis (16).
  2. Header plate according to Claim 1, characterized in that the central part (15) is curved approximately correspondingly to a spherical cap.
  3. Header plate according to Claim 1, characterized in that the radius of curvature (r1) about the first axis (16) is different from that (r2) about the second axis (17).
  4. Header plate according to Claim 1, characterized in that the radius of curvature (r1) about the first axis (16) is the same as that (r2) about the second axis (17).
  5. Header plate according to one of Claims 1 to 4, characterized in that at least most orifices (13) for receiving the tubes (14) are contained in the curved central part (15).
  6. Header plate according to one of Claims 1 to 5, characterized in that the curved central part (15) is bordered by a planar non-curved marginal region (20).
  7. Header plate according to Claim 6, characterized in that the planar marginal region (20) has, at least on one side (12), approximately planar fastening surfaces (21) for the fastening of a cover part thereto, for example by soldering, welding or the like.
  8. Header plate according to one of Claims 1 to 7, characterized in that the flat part (11) has an approximately rectangular contour.
  9. Header plate according to one of Claims 1 to 8, characterized in that the central part (15) is approximately rectangular.
  10. Header plate according to one of Claims 1 to 9, characterized in that a longitudinal axis running approximately parallel to the longitudinal direction (18) of the flat part (11) forms the first axis (16) and the axis of curvature for the transverse curvature of the central part (15).
  11. Header plate according to one of Claims 1 to 10, characterized in that a transverse axis running approximately parallel to the transverse direction (19) of the flat part (11) forms the second axis (17) and the axis of curvature for the longitudinal curvature of the central part (15).
  12. Header plate according to one of Claims 1 to 11, characterized in that the transverse curvature of the curved central part (15) has the greatest curvature approximately in the region of the middle of the central part (15), and in that the size of the curvature decreases from the middle toward both sides in the longitudinal direction (18).
  13. Header plate according to one of Claims 1 to 12, characterized in that individual regions of the flat part (11) have a biaxial curvature and/or other regions of this have a uniaxial curvature.
  14. Header plate according to one of Claims 1 to 13, characterized in that the orifices (13) are designed, in adaptation to flat tubes (14) to be received, as correspondingly adapted slots, and in that the slot run is directed in each case transversely to the first axis (16) of the central part (15).
  15. Header plate according to one of Claims 1 to 14, characterized in that at least some orifices (13) for receiving the tubes (14) are delimited by a rim (23).
  16. Header plate according to Claim 15, characterized in that the rims (23) point towards that side (12) of the flat part (11) on which the cover part can be fastened or towards the opposite side.
  17. Header plate according to Claim 15 or 16, characterized in that the height of the rims (23) is the same for all the rims (23).
  18. Header plate according to one of Claims 1 to 17, characterized in that the flat part (11) is formed from aluminium.
  19. Header plate according to one of Claims 1 to 18, characterized in that the flat part (11) has a cross-sectional thickness of the order of about 0.8 to 6 mm.
  20. Tank for a heat exchanger, which is composed of a header plate (10) and of a cover part, characterized in that the header plate (10) has the features of one or more of the preceding claims.
  21. Tank according to Claim 20, characterized in that the cover part is fastened, pressure-tight, to the planar non-curved marginal region (20) of the flat part (11), in particular to the planar fastening surfaces (21) of this, by welding, soldering or the like.
  22. Tank according to Claim 20 or 21, characterized in that the rims (23) project towards the interior of the tank.
  23. Tank according to one of Claims 20 to 22, characterized in that the cover part is formed from aluminium and preferably consists of a deep-drawn part.
  24. Heat exchanger with at least one tank formed from a header plate (10) and cover part and with tubes (14) which are received and fashioned, pressure-tight, in orifices (13) in the header plate (10), the header plate (10) having the features of one or more of the preceding claims, characterized in that all the tubes (14) have the same length, and in that the tubes (14) received in the orifices (13) project, with their end directed towards the interior of the tank, beyond the header plate (10) and protrude into the tank interior to a different extent, the tubes (14) located in the region of the middle of the central part (15) projecting with their ends beyond the header plate (10) further than the tubes (14) following on both sides in the longitudinal direction.
  25. Heat exchanger according to Claim 24, characterized in that the tubes (14) are designed as flat tubes.
  26. Heat exchanger according to Claim 24, characterized in that the tubes (14) which follow on both sides from the middle of the central part (15) project with their ends beyond the header plate (10) to a lesser extent than the tubes (14) in the region of the middle.
EP20070012127 2006-08-09 2007-06-21 Domed header plate for the tank of a heat exchanger Ceased EP1890102B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610037192 DE102006037192A1 (en) 2006-08-09 2006-08-09 Floor part for a collecting box of a heat exchanger

Publications (2)

Publication Number Publication Date
EP1890102A1 EP1890102A1 (en) 2008-02-20
EP1890102B1 true EP1890102B1 (en) 2013-04-03

Family

ID=38694948

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070012127 Ceased EP1890102B1 (en) 2006-08-09 2007-06-21 Domed header plate for the tank of a heat exchanger

Country Status (3)

Country Link
EP (1) EP1890102B1 (en)
DE (1) DE102006037192A1 (en)
WO (1) WO2008021162A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106461353A (en) * 2013-12-13 2017-02-22 法雷奥热系统公司 Collection box and corresponding heat exchanger

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008011579A1 (en) * 2008-02-28 2009-09-03 Behr Gmbh & Co. Kg Base plate of a collecting tank for cooling water and heat exchanger for motor vehicles
DE102012202886A1 (en) * 2012-02-24 2013-08-29 Behr Gmbh & Co. Kg Heat exchanger for motor vehicles, has pipe, block with ribs, pipe base and collecting box, where base area of pipe base is formed in curved shape with low point that is deeply arranged opposite to outer areas
DE102019209222A1 (en) * 2019-06-26 2020-12-31 Krones Ag Tubular heat exchanger

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GB1016251A (en) * 1960-09-22 1966-01-05 Richardsons Westgarth & Co Improvements in or relating to heat exchangers
US4207944A (en) * 1978-02-15 1980-06-17 Joseph Oat Corporation Heat exchanger for withstanding cyclic changes in temperature
FR2484071B1 (en) * 1980-06-05 1985-12-13 Valeo HOLE PLATE FOR A HEAT EXCHANGER WITH FLUID CIRCULATION TUBES
US4615385B1 (en) * 1985-04-12 1994-12-20 Modine Mfg Co Heat exchanger
JPH02109184U (en) * 1989-02-17 1990-08-30
FR2742531B1 (en) * 1995-12-13 1998-01-30 Valeo Thermique Moteur Sa HEAT EXCHANGER COLLECTING PLATE, MANUFACTURING METHOD AND HEAT EXCHANGER COMPRISING SUCH A COLLECTING PLATE
US7775267B2 (en) * 2003-07-08 2010-08-17 Showa Denko K.K. Evaporator
JP2005308366A (en) * 2004-04-26 2005-11-04 T Rad Co Ltd Heat exchanger
US7303003B2 (en) * 2004-12-24 2007-12-04 Showa Denko K.K. Heat exchanger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106461353A (en) * 2013-12-13 2017-02-22 法雷奥热系统公司 Collection box and corresponding heat exchanger
CN106461353B (en) * 2013-12-13 2022-05-03 法雷奥热系统公司 Collecting tank and corresponding heat exchanger

Also Published As

Publication number Publication date
EP1890102A1 (en) 2008-02-20
WO2008021162A3 (en) 2008-07-03
DE102006037192A1 (en) 2008-02-14
WO2008021162A2 (en) 2008-02-21

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