EP2909562A1 - Heat exchanger - Google Patents

Heat exchanger

Info

Publication number
EP2909562A1
EP2909562A1 EP13783291.1A EP13783291A EP2909562A1 EP 2909562 A1 EP2909562 A1 EP 2909562A1 EP 13783291 A EP13783291 A EP 13783291A EP 2909562 A1 EP2909562 A1 EP 2909562A1
Authority
EP
European Patent Office
Prior art keywords
edge
height
recess
region
narrow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13783291.1A
Other languages
German (de)
French (fr)
Other versions
EP2909562B1 (en
Inventor
Jürgen Kaiser
Boris Kerler
Alexander Meiser
Wael Nassar
Martin Paarmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2909562A1 publication Critical patent/EP2909562A1/en
Application granted granted Critical
Publication of EP2909562B1 publication Critical patent/EP2909562B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • 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
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • 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

Definitions

  • the present invention relates to a heat exchanger for heat exchange between a first fluid and a second fluid according to the preamble of claim 1.
  • the invention also relates to a floor for such a heat exchanger.
  • a generic heat exchanger for example in the manner of a cooler, is known from WO 2008/071362 A1, having a block for the separate and heat-exchanging guidance of the two fluids, which has a number of flat tubes through which the first fluid flows, with a tube narrow side and a tube broad side.
  • the flat tubes terminate each longitudinal end in a bottom of a box, the flat tubes are guided through corresponding through holes in the ground in the box.
  • Each of the through holes in the bottom has a the corresponding flat tube bordering and erected edge, the edge broadsides are usually higher than the narrow edges and merge into one another via a corresponding inclination.
  • the present invention therefore deals with the problem of providing a heat exchanger of the generic type an improved embodiment, which is characterized in particular by a longer service life.
  • This problem is solved according to the invention by the subject matters of the independent claims.
  • Advantageous embodiments are the subject of the dependent claims.
  • the present invention is based on the general idea, in the region of an inclination over which a broad side edge merges into a lower edge narrow side, to provide a particular rounded recess whose height is less than that of the edge narrow side, whereby the stresses in the region of the corners of the flat tubes are bordered by the respective edge of the passage opening, reduced by about 14% and the life can be increased by about 50%.
  • the heat exchanger according to the invention is constructed as follows: It has a block for the separate and heat exchanging guidance of a first and a second fluid, said block having a number of first fluid flowed through flat tubes with a narrow pipe side and a pipe broadside.
  • the flat tubes are introduced via corresponding through holes in a bottom in a box and fluidly connected thereto.
  • Each of these through holes has an associated edge of the associated flat tube and erected, wherein the marginal broad sides of this edge are higher than the narrow edges and merge into one another via a corresponding inclination.
  • the recess is now provided in the region of this inclination, in particular in a corner region, whose height is less than that of the edge narrow side and which leads to the voltage reduction described above.
  • a contact surface edge of a contact surface between the edge and the flat tube in the region of the recess has a lower height than in the region of the edge narrow side. This contributes significantly to reduce the stresses occurring in the corner region of the flat tube.
  • the height of the particular rounded recess corresponds to about half the height of the edge broadside.
  • the variation of the height was carried out after the surprising finding of the effect of the recess according to the invention.
  • the recess can show both a roundish, angular and a tapered geometry.
  • the height of the edge broadside may for example be about 7 mm, in which case the height of the recess is about 3.5 mm. This information is particularly conceivable for common heat exchangers, as used for example as coolers in motor vehicles.
  • FIG. 2 shows a detailed representation of a bottom of the heat exchanger with a recess arranged in the region of an inclination of an edge
  • FIG. 3 is a view as in Fig. 2, but from a different perspective
  • FIG. 4a is a detailed view of a bottom of a heat exchanger according to the prior art with bent-out edge on the edge narrow side and an interrupted drawn contact surface edge between the bottom and flat tube,
  • FIG. 5a is a representation as in Fig. 4a, but in a heat exchanger according to the invention / soil,
  • Fig. 5b is a representation as in Fig. 4b, but with interrupted subscribed contact surface edge in a heat exchanger / floor according to the invention.
  • a heat exchanger 1 for exchanging heat between a first and a second fluid, for example for heat exchange between air and coolant, has a block 2 for the separate and heat-exchanging guidance of the two fluids, comprising a number of flat tubes 3 through which the first fluid flows has a narrow pipe side 4 and a pipe broadside 5.
  • the flat tubes 3 are via appropriate fürgangsöff- 6 (see also Figures 2 and 3) in a bottom 7 in a box 8 and thereby fluidly connected thereto.
  • Each of the through holes 6 has a corresponding flat tube 3 bordering and erected edge 9, wherein the marginal broad sides 10 are higher than the narrow edges of the page 1 1 and on a corresponding inclination 12 merge into each other (see in particular Figure 3).
  • a rounded recess 13 is now provided in the region of this inclination 12, the height hi is less than the height h 2 of the edge narrow side 1 1 and of course less than the height h 3 of the edge broadside 10.
  • a voltage in a bordered by the edge 9 flat tube 3 clearly, for example, by 14%, can be reduced, whereby the life of the heat exchanger 1 can be increased by almost 50%.
  • the height hi of the rounded-out recess 13 preferably corresponds to approximately half of the height h 3 of the edge broadside, so that, for example, at a height h 3 of approximately 7 mm, the height hi of the recess 13 is approximately 3.5 mm.
  • the recess 13 is located directly on the edge narrow side 1 1 and then goes over the slope 12 in the edge broadside 10 on.
  • bottom 7 protection should not only be desired exclusively for the heat exchanger 1 according to the invention, but additionally also for the bottom 7, as illustrated as a single segment in FIGS. 2 and 3, for example. From such individual segments thus an almost arbitrarily long bottom 7 can be assembled.
  • a bottom 7, that is, such a bottom element 7 ' has a passage opening 6 with a surrounding raised edge 9, wherein the marginal broad sides 10 are higher than the narrow edges 1 1 and pass over a corresponding inclination 12 into each other.
  • Each of the bottom elements 7 ' has in the region of the slope 12 the previously mentioned rounded recess 13, the height hi is less than the height h 2 of the narrow edge.
  • four recesses 13 on the peripheral edge 9 are provided per floor element 7 'or per floor 7.
  • the bottom 7 or the associated bottom element 7 ' may be formed, for example, as a sheet metal part.
  • FIGS. 4 a and 4 b there is shown a heat exchanger 1 'according to the prior art, for example according to DE 10 201 1075 071 A1, in which the edge 9' is bent outwards on the narrow edge 1 1 ' is.
  • the contact surface edge 14 ' is drawn here interrupted and represents an edge of a contact surface 16' between the edge 9 'and the flat tube 3'.
  • the height h of the contact surface edge 14 in the region of the narrow edge 1 1 ' thus corresponds to the height h 5 of the contact surface edge 14 'in the region of the recess 13'.
  • the contact surface edge 14 in the region of the recess 13 likewise has a fillet 15 which contributes substantially to reducing the stresses occurring in the corner region of the flat tube 3.
  • Fig. 5b but also shown in Fig. 5a.
  • the contact surface edge 14 extends in the region of the recess 13 below the contact surface edge 14 in the region of the edge narrow side 11.
  • the contact surface 16 is correspondingly excluded in the region of the recess 13.
  • the contact surface edge 14 thus has a smaller height h 5 in the region of the recess 13 than in the region of the narrow edge 1 1, that is, the height h of the contact surface edge 14 in the region of the narrow edge 1 1 is greater than in the region of the recess thirteenth
  • the height h of the contact surface edge 14 is also smaller in the region of the edge narrow side 1 1 than the height h 3 of the edge 9 in the region of the edge broadside 10. The same applies to the height h 5 of the contact surface edge 14 in the region of the recess thirteenth
  • the edge 9 in the corner region that is, in the region of the recess 13 have a reduced wall thickness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention relates to a heat exchanger (1) for exchanging heat between a first fluid and a second fluid, comprising a block (2) for conducting the two fluids separately and so as to exchange heat, said block having a number of first flat tubes (3) through which the first fluid flows and which comprise a narrow tube side (4) and a wide tube side (5), and comprising a box (8) which has a base (7), said flat tubes (3) being guided into the box (8) via corresponding through-openings (6) in the base (7). Each through-opening (6) has at least one raised edge (9) which surrounds the corresponding flat tube (3). The wide edge sides (10) are higher than the narrow edge sides (11) and transition into one another via a corresponding inclination (12). It is essential to the invention that a recess (13) is provided in the region of the inclination (12), the height (h1) of said recess being lower than the height (h2) of the narrow edge side (11), and a contact surface edge (14) of a contact surface (16) between the edge (9) and the flat tube (3) has a lower height (h5) in the region of the recess (13) than in the region of the narrow edge side (11). In this manner, a stress load can be reduced and the service life can be extended.

Description

Wärmetauscher  heat exchangers
Die vorliegende Erfindung betrifft einen Wärmetauscher zum Wärmetausch zwischen einem ersten Fluid und einem zweiten Fluid gemäß dem Oberbegriff des Anspruchs 1 . Die Erfindung betrifft außerdem einen Boden für einen derartigen Wärmetauscher. The present invention relates to a heat exchanger for heat exchange between a first fluid and a second fluid according to the preamble of claim 1. The invention also relates to a floor for such a heat exchanger.
Aus der WO 2008/071362 A1 ist ein gattungsgemäßer Wärmetauscher, beispielsweise in der Art eines Kühlers, bekannt, mit einem Block zur getrennten und wärmetauschenden Führung der beiden Fluide, der eine Anzahl vom ersten Fluid durchströmte Flachrohre mit einer Rohrschmalseite und einer Rohrbreitseite aufweist. Die Flachrohre enden jeweils längsendseitig in einem Boden eines Kastens, wobei die Flachrohre über entsprechende Durchgangsöffnungen im Boden in den Kasten geführt sind. Jede der Durchgangsöffnungen im Boden besitzt dabei einen das zugehörige Flachrohr einfassenden und aufgestellten Rand, wobei die Randbreitseiten üblicherweise höher sind als die Randschmalseiten und über eine entsprechende Neigung ineinander übergehen. A generic heat exchanger, for example in the manner of a cooler, is known from WO 2008/071362 A1, having a block for the separate and heat-exchanging guidance of the two fluids, which has a number of flat tubes through which the first fluid flows, with a tube narrow side and a tube broad side. The flat tubes terminate each longitudinal end in a bottom of a box, the flat tubes are guided through corresponding through holes in the ground in the box. Each of the through holes in the bottom has a the corresponding flat tube bordering and erected edge, the edge broadsides are usually higher than the narrow edges and merge into one another via a corresponding inclination.
Nachteilig bei dem bekannten Wärmetauscher ist jedoch, dass sich aufgrund der hohen Temperaturdifferenzen Spannungen im Bereich der Neigung zwischen der Randbreitseite und der Randschmalseite am Boden des Wärmetauschers ergeben, die sich nachteilig auf die Lebensdauer des Wärmetauschers auswirken. A disadvantage of the known heat exchanger, however, that arise due to the high temperature differences stresses in the range of inclination between the edge broad side and the narrow side edge at the bottom of the heat exchanger, which adversely affect the life of the heat exchanger.
Die vorliegende Erfindung beschäftigt sich daher mit dem Problem, für einen Wärmetauscher der gattungsgemäßen Art eine verbesserte Ausführungsform anzugeben, die sich insbesondere durch eine längere Lebensdauer auszeichnet. Dieses Problem wird erfindungsgemäß durch die Gegenstände der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche. The present invention therefore deals with the problem of providing a heat exchanger of the generic type an improved embodiment, which is characterized in particular by a longer service life. This problem is solved according to the invention by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.
Die vorliegende Erfindung beruht auf dem allgemeinen Gedanken, im Bereich einer Neigung, über welche eine Randbreitseite in eine niedere Randschmalseite übergeht, eine insbesondere ausgerundete Ausnehmung vorzusehen, deren Höhe geringer ist als diejenige der Randschmalseite, wodurch die Spannungen im Bereich der Ecken der Flachrohre, die vom jeweiligen Rand der Durchgangsöff- nung umrandet sind, um ca. 14 % reduziert und die Lebensdauer um ca. 50 % erhöht werden können. Generell ist dabei der erfindungsgemäße Wärmetauscher wie folgt aufgebaut: Er besitzt einen Block zur getrennten und wärmetauschenden Führung eines ersten und eines zweiten Fluides, wobei dieser Block eine Anzahl vom ersten Fluid durchströmte Flachrohre mit einer Rohrschmalseite und einer Rohrbreitseite besitzt. Die Flachrohre sind dabei über entsprechende Durchgangsöffnungen in einem Boden in einen Kasten eingeführt und fluidisch mit diesem verbunden. Jede dieser Durchgangsöffnungen weist einen das zugehörige Flachrohr einfassenden und aufgestellten Rand auf, wobei die Randbreitseiten dieses Randes höher sind als die Randschmalseiten und über eine entsprechende Neigung ineinander übergehen. Erfindungsgemäß ist nun im Bereich dieser Neigung, insbesondere in einem Eckbereich, die Ausnehmung vorgesehen, deren Höhe geringer ist als die der Randschmalseite und die zu der zuvor beschriebenen Spannungsreduzierung führt. Zusätzlich weist ein Kontaktflächenrand einer Kontaktfläche zwischen dem Rand und dem Flachrohr im Bereich der Ausnehmung eine geringere Höhe auf als im Bereich der Randschmalseite. Dies trägt wesentlich dazu bei, die im Eckbereich des Flachrohres auftretenden Spannungen zu reduzieren. Das Vorsehen dieser Ausnehmung hat in überraschender Weise zu einer deutlichen Abnahme der Spannung und damit zu einem deutlichen Anstieg der Lebensdauer des Wärmetauschers geführt. Zweckmäßig entspncht die Höhe der insbesondere ausgerundeten Ausnehmung ca. der Hälfte der Höhe der Randbreitseite. Durch Variation der Höhen der Ausnehmungen konnte festgestellt werden, dass die Reduzierung der Spannung in den Ecken der Flachrohre dann am Größten war, wenn die Höhe der Ausnehmung ca. der Hälfte der Höhe der Randbreitseite entsprach. Die Variation der Höhe wurde dabei nach dem überraschenden Auffinden der erfindungsgemäßen Wirkung der Ausnehmung vorgenommen. Die Ausnehmung kann dabei sowohl eine rundliche, eckige sowie eine spitz zulaufende Geometrie aufzeigen. The present invention is based on the general idea, in the region of an inclination over which a broad side edge merges into a lower edge narrow side, to provide a particular rounded recess whose height is less than that of the edge narrow side, whereby the stresses in the region of the corners of the flat tubes are bordered by the respective edge of the passage opening, reduced by about 14% and the life can be increased by about 50%. In general, the heat exchanger according to the invention is constructed as follows: It has a block for the separate and heat exchanging guidance of a first and a second fluid, said block having a number of first fluid flowed through flat tubes with a narrow pipe side and a pipe broadside. The flat tubes are introduced via corresponding through holes in a bottom in a box and fluidly connected thereto. Each of these through holes has an associated edge of the associated flat tube and erected, wherein the marginal broad sides of this edge are higher than the narrow edges and merge into one another via a corresponding inclination. According to the invention, the recess is now provided in the region of this inclination, in particular in a corner region, whose height is less than that of the edge narrow side and which leads to the voltage reduction described above. In addition, a contact surface edge of a contact surface between the edge and the flat tube in the region of the recess has a lower height than in the region of the edge narrow side. This contributes significantly to reduce the stresses occurring in the corner region of the flat tube. The provision of this recess has led in a surprising manner to a significant decrease in the voltage and thus to a significant increase in the life of the heat exchanger. Appropriately, the height of the particular rounded recess corresponds to about half the height of the edge broadside. By varying the heights of the recesses, it could be stated that the reduction in the tension in the corners of the flat tubes was greatest when the height of the recess corresponded to approximately half the height of the edge broadside. The variation of the height was carried out after the surprising finding of the effect of the recess according to the invention. The recess can show both a roundish, angular and a tapered geometry.
Die Höhe der Randbreitseite kann beispielsweise ca. 7 mm betragen, wobei dann die Höhe der Ausnehmung ca. 3,5 mm beträgt. Diese Angaben sind insbesondere für gängige Wärmetauscher, wie diese beispielsweise als Kühler in Kraftfahrzeugen eingesetzt werden, vorstellbar. The height of the edge broadside may for example be about 7 mm, in which case the height of the recess is about 3.5 mm. This information is particularly conceivable for common heat exchangers, as used for example as coolers in motor vehicles.
Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen. Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.
Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen. It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.
Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Bauteile beziehen. Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.
Dabei zeigen, jeweils schematisch, einen Ausschnitt aus einem erfindungsgemäßen Wärmetauscher, Show, in each case schematically, a section of a heat exchanger according to the invention,
Fig. 2 eine Detaildarstellung eines Bodens des Wärmetauschers mit einer im Bereich einer Neigung eines Randes angeordneten Ausnehmung, 2 shows a detailed representation of a bottom of the heat exchanger with a recess arranged in the region of an inclination of an edge,
Fig. 3 eine Darstellung wie in Fig. 2, jedoch aus anderer Perspektive, 3 is a view as in Fig. 2, but from a different perspective,
Fig. 4a eine Detaildarstellung eines Bodens eines Wärmetauschers nach dem Stand der Technik mit nach außen abgebogenem Rand an der Randschmalseite und einem unterbrochen gezeichneten Kontaktflächenrand zwischen Boden und Flachrohr, 4a is a detailed view of a bottom of a heat exchanger according to the prior art with bent-out edge on the edge narrow side and an interrupted drawn contact surface edge between the bottom and flat tube,
Fig. 4b ein Flachrohr mit unterbrochen gezeichnetem Kontaktflächenrand zu einem Boden nach dem Stand der Technik, 4b, a flat tube with interrupted drawn contact surface edge to a bottom according to the prior art,
Fig. 5a eine Darstellung wie in Fig. 4a, jedoch bei einem erfindungsgemäßen Wärmetauscher/Boden, 5a is a representation as in Fig. 4a, but in a heat exchanger according to the invention / soil,
Fig. 5b eine Darstellung wie in Fig. 4b, jedoch mit unterbrochen gezeichnetem Kontaktflächenrand bei einem erfindungsgemäßen Wärmetauscher/Boden. Fig. 5b is a representation as in Fig. 4b, but with interrupted subscribed contact surface edge in a heat exchanger / floor according to the invention.
Entsprechend der Figur 1 , weist ein erfindungsgemäßer Wärmetauscher 1 zum Wärmetausch zwischen einem ersten und einem zweiten Fluid, beispielsweise zum Wärmetausch zwischen Luft und Kühlmittel, einen Block 2 zur getrennten und wärmetauschenden Führung der beiden Fluide auf, der eine Anzahl vom ersten Fluid durchströmte Flachrohre 3 mit einer Rohrschmalseite 4 und einer Rohrbreitseite 5 besitzt. Die Flachrohre 3 sind über entsprechende Durchgangsöff- nungen 6 (vergleiche auch die Figuren 2 und 3) in einem Boden 7 in einen Kasten 8 geführt und dadurch fluidisch mit diesem verbunden. Jede der Durchgangsöffnungen 6 besitzt einen das zugehörige Flachrohr 3 einfassenden und aufgestellten Rand 9, wobei die Randbreitseiten 10 höher sind als die Randschmalseiten 1 1 und über eine entsprechende Neigung 12 ineinander übergehen (vergleiche insbesondere Figur 3). Erfindungsgemäß ist nun im Bereich dieser Neigung 12 eine ausgerundete Ausnehmung 13 vorgesehen, deren Höhe hi geringer ist als die Höhe h2 der Randschmalseite 1 1 und selbstverständlich auch geringer als die Höhe h3 der Randbreitseite 10. Durch die ausgerundete Ausnehmung 13 kann eine Spannung in einem durch den Rand 9 eingefassten Flachrohr 3 deutlich, beispielsweise um 14 %, reduziert werden, wodurch die Lebensdauer des Wärmetauschers 1 um nahezu 50 % gesteigert werden kann. According to FIG. 1, a heat exchanger 1 according to the invention for exchanging heat between a first and a second fluid, for example for heat exchange between air and coolant, has a block 2 for the separate and heat-exchanging guidance of the two fluids, comprising a number of flat tubes 3 through which the first fluid flows has a narrow pipe side 4 and a pipe broadside 5. The flat tubes 3 are via appropriate Durchgangsöff- 6 (see also Figures 2 and 3) in a bottom 7 in a box 8 and thereby fluidly connected thereto. Each of the through holes 6 has a corresponding flat tube 3 bordering and erected edge 9, wherein the marginal broad sides 10 are higher than the narrow edges of the page 1 1 and on a corresponding inclination 12 merge into each other (see in particular Figure 3). According to the invention, a rounded recess 13 is now provided in the region of this inclination 12, the height hi is less than the height h 2 of the edge narrow side 1 1 and of course less than the height h 3 of the edge broadside 10. By the rounded recess 13, a voltage in a bordered by the edge 9 flat tube 3 clearly, for example, by 14%, can be reduced, whereby the life of the heat exchanger 1 can be increased by almost 50%.
Die Höhe hi der ausgerundeten Ausnehmung 13 entspricht dabei vorzugsweise ca. der Hälfte der Höhe h3 der Randbreitseite, so dass beispielsweise bei einer Höhe h3 von ca. 7 mm die Höhe hi der Ausnehmung 13 ca. 3,5 mm beträgt. Wie insbesondere den Detaildarstellungen in den Figuren 2 und 3 zu entnehmen ist, liegt die Ausnehmung 13 direkt an der Randschmalseite 1 1 an und geht anschließend über die Neigung 12 in die Randbreitseite 10 über. The height hi of the rounded-out recess 13 preferably corresponds to approximately half of the height h 3 of the edge broadside, so that, for example, at a height h 3 of approximately 7 mm, the height hi of the recess 13 is approximately 3.5 mm. As can be seen in particular the detailed representations in Figures 2 and 3, the recess 13 is located directly on the edge narrow side 1 1 and then goes over the slope 12 in the edge broadside 10 on.
Schutz soll hierbei jedoch nicht nur ausschließlich für den erfindungsgemäßen Wärmetauscher 1 begehrt werden, sondern zusätzlich auch für den Boden 7, wie dieser als Einzelsegment beispielsweise in den Figuren 2 und 3 dargestellt ist. Aus derartigen Einzelsegmenten kann somit ein nahezu beliebig langer Boden 7 zusammengesetzt werden. Ein derartiger Boden 7, das heißt ein derartiges Bodenelement 7', weist eine Durchgangsöffnung 6 mit einem diesen umgebenden aufgestellten Rand 9 auf, wobei die Randbreitseiten 10 höher sind als die Randschmalseiten 1 1 und über eine entsprechende Neigung 12 ineinander übergehen. Jedes der Bodenelemente 7' besitzt dabei im Bereich der Neigung 12 die zuvor erwähnte ausgerundete Ausnehmung 13, deren Höhe hi geringer ist als die Höhe h2 der Randschmalseite. Insgesamt sind so je Bodenelement 7' bzw. je Boden 7 vier Ausnehmungen 13 am umlaufenden Rand 9 vorgesehen. Der Boden 7 bzw. das zugehörige Bodenelement 7' kann beispielsweise als Blechformteil ausgebildet sein. In this case, however, protection should not only be desired exclusively for the heat exchanger 1 according to the invention, but additionally also for the bottom 7, as illustrated as a single segment in FIGS. 2 and 3, for example. From such individual segments thus an almost arbitrarily long bottom 7 can be assembled. Such a bottom 7, that is, such a bottom element 7 ', has a passage opening 6 with a surrounding raised edge 9, wherein the marginal broad sides 10 are higher than the narrow edges 1 1 and pass over a corresponding inclination 12 into each other. Each of the bottom elements 7 'has in the region of the slope 12 the previously mentioned rounded recess 13, the height hi is less than the height h 2 of the narrow edge. Altogether, four recesses 13 on the peripheral edge 9 are provided per floor element 7 'or per floor 7. The bottom 7 or the associated bottom element 7 'may be formed, for example, as a sheet metal part.
Mit der erfindungsgemäßen Ausnehmung 13 ist es möglich, die auf insbesondere die Flachrohre 3 wirkende Spannung deutlich zu reduzieren und damit die Lebensdauer des Wärmetauschers 1 deutlich zu erhöhen. With the recess 13 according to the invention, it is possible to significantly reduce the voltage acting on the flat tubes 3, in particular, and thus significantly increase the service life of the heat exchanger 1.
Betrachtet man die Fig. 4a und 4b, so ist dort ein Wärmetauscher 1 ' nach dem Stand der Technik, beispielsweise nach der DE 10 201 1 075 071 A1 , gezeigt, bei welchem an der Randschmalseite 1 1 ' der Rand 9' nach außen abgebogen ist. Dies führt dazu, dass ein Kontaktflächenrand 14' zwischen dem Rand 9' und dem Flachrohr 3' auf der Randschmalseite 1 1 ' auf gleicher Höhe h verläuft, wie im Bereich der ausgerundeten Ausnehmung 13', wie dies anschaulich in Fig. 4b dargestellt ist. Der Kontaktflächenrand 14' ist dabei unterbrochen gezeichnet und stellt einen Rand einer Kontaktfläche 16 ' zwischen dem Rand 9' und dem Flachrohr 3' dar. Die Höhe h des Kontaktflächenrandes 14 im Bereich der Randschmalseite 1 1 ', entspricht somit der Höhe h5 des Kontaktflächenrandes 14' im Bereich der Ausnehmung 13'. Looking at FIGS. 4 a and 4 b, there is shown a heat exchanger 1 'according to the prior art, for example according to DE 10 201 1075 071 A1, in which the edge 9' is bent outwards on the narrow edge 1 1 ' is. This results in that a contact surface edge 14 'between the edge 9' and the flat tube 3 'on the edge narrow side 1 1' at the same height h, as in the region of the rounded recess 13 ', as shown clearly in Fig. 4b. The contact surface edge 14 'is drawn here interrupted and represents an edge of a contact surface 16' between the edge 9 'and the flat tube 3'. The height h of the contact surface edge 14 in the region of the narrow edge 1 1 ', thus corresponds to the height h 5 of the contact surface edge 14 'in the region of the recess 13'.
Bei dem erfindungsgemäßen Wärmetauscher 1 nach den Fig. 1 bis 3 und 5 hingegen, weist der Kontaktflächenrand 14 im Bereich der Ausnehmung 13 analog zu dieser ebenfalls eine Ausrundung 15 auf, die wesentlich dazu beiträgt, die im Eckbereich des Flachrohres 3 auftretenden Spannungen zu reduzieren. Dies ist sehr anschaulich in Fig. 5b, aber auch in Fig. 5a gezeigt. Man kann deutlich erkennen, dass der Kontaktflächenrand 14 im Bereich der Ausnehmung 13 unterhalb des Kontaktflächenrandes 14 im Bereich der Randschmalseite 1 1 verläuft. Die Kontaktfläche 16 ist im Bereich der Ausnehmung 13 entsprechend ausgenommen. Der Kontaktflächenrand 14 weist somit im Bereich der Ausnehmung 13 eine geringere Höhe h5 aufweist als im Bereich der Randschmalseite 1 1 , das heißt die Höhe h des Kontaktflächenrandes 14 im Bereich der Randschmalseite 1 1 ist größer als im Bereich der Ausnehmung 13. In contrast, in the case of the heat exchanger 1 according to the invention according to FIGS. 1 to 3 and 5, the contact surface edge 14 in the region of the recess 13 likewise has a fillet 15 which contributes substantially to reducing the stresses occurring in the corner region of the flat tube 3. This is very clear in Fig. 5b, but also shown in Fig. 5a. It can be clearly seen that the contact surface edge 14 extends in the region of the recess 13 below the contact surface edge 14 in the region of the edge narrow side 11. The contact surface 16 is correspondingly excluded in the region of the recess 13. The contact surface edge 14 thus has a smaller height h 5 in the region of the recess 13 than in the region of the narrow edge 1 1, that is, the height h of the contact surface edge 14 in the region of the narrow edge 1 1 is greater than in the region of the recess thirteenth
Die Höhe h des Kontaktflächenrandes 14 ist zudem im Bereich der Randschmalseite 1 1 kleiner als die Höhe h3 des Randes 9 im Bereich der Randbreitseite 10. Gleiches gilt auch für die Höhe h5 des Kontaktflächenrandes 14 im Bereich der Ausnehmung 13. The height h of the contact surface edge 14 is also smaller in the region of the edge narrow side 1 1 than the height h 3 of the edge 9 in the region of the edge broadside 10. The same applies to the height h 5 of the contact surface edge 14 in the region of the recess thirteenth
Zur weiteren Entlastung des Flachrohres 3, kann der Rand 9 im Eckbereich, das heißt im Bereich der Ausnehmung 13 eine reduzierte Wandstärke aufweisen. To further relieve the flat tube 3, the edge 9 in the corner region, that is, in the region of the recess 13 have a reduced wall thickness.

Claims

Ansprüche claims
1 . Wärmetauscher (1 ) zum Wärmetausch zwischen einem ersten Fluid und einem zweiten Fluid, 1 . Heat exchanger (1) for exchanging heat between a first fluid and a second fluid,
- mit einem Block (2) zur getrennten und wärmetauschenden Führung der beiden Fluide, der eine Anzahl vom ersten Fluid durchströmte Flachrohre (3) mit einer Rohrschmalseite (4) und einer Rohrbreitseite (5) aufweist,  - With a block (2) for the separate and heat exchange guidance of the two fluids, which has a number of first fluid flowed through flat tubes (3) with a narrow side pipe (4) and a pipe broadside (5),
- mit einem einen Boden (7) aufweisenden Kasten (8), wobei die Flachrohre (3) über entsprechende Durchgangsöffnungen (6) im Boden (7) in den Kasten (8) geführt sind,  - With a bottom (7) having box (8), wherein the flat tubes (3) via corresponding through holes (6) in the bottom (7) are guided in the box (8),
- wobei jede Durchgangsöffnung (6) mindestens einen das zugehörige Flachrohr (3) einfassenden und aufgestellten Rand (9) aufweist,  each passage opening (6) has at least one edge (9) enclosing and erecting the associated flat tube (3),
- wobei die Randbreitseiten (10) höher sind als die Randschmalseiten (1 1 ) und über eine entsprechende Neigung (12) ineinander übergehen,  - The edge broad sides (10) are higher than the narrow edges (1 1) and pass over a corresponding inclination (12) into each other,
dadurch gekennzeichnet, characterized,
- dass im Bereich der Neigung (12) eine Ausnehmung (13) vorgesehen ist, deren Höhe (hi) geringer ist als die Höhe (h2) der Randschmalseite (1 1 ),- That in the region of the inclination (12) has a recess (13) is provided whose height (hi) is less than the height (h 2 ) of the narrow edge side (1 1),
- dass ein Kontaktflächenrand (14) einer Kontaktfläche (16) zwischen dem Rand (9) und dem Flachrohr (3) im Bereich der Ausnehmung (13) eine geringere Höhe h5 aufweist als im Bereich der Randschmalseite (1 1 ). - That a contact surface edge (14) of a contact surface (16) between the edge (9) and the flat tube (3) in the region of the recess (13) has a lower height h 5 than in the region of the narrow edge (1 1).
2. Wärmetauscher nach Anspruch 1 , 2. Heat exchanger according to claim 1,
dadurch gekennzeichnet, characterized,
dass die Höhe (hi) der Ausnehmung (13) ca. der Hälfte der Höhe (h3) der Randbreitseite (10) entspricht. the height (hi) of the recess (13) corresponds to approximately half the height (h 3 ) of the edge broadside (10).
3. Wärmetauscher nach Anspruch 1 oder 2, 3. Heat exchanger according to claim 1 or 2,
dadurch gekennzeichnet, characterized,
- dass die Höhe (h3) der Randbreitseite (10) ca. 7 mm beträgt, und/oder - That the height (h 3 ) of the edge broadside (10) is about 7 mm, and / or
- dass die Höhe (hi) der Ausnehmung (13) ca. 3,5 mm beträgt.  - That the height (hi) of the recess (13) is approximately 3.5 mm.
4. Wärmetauscher nach einem der Ansprüche 1 bis 3, 4. Heat exchanger according to one of claims 1 to 3,
dadurch gekennzeichnet, characterized,
dass die Höhe h des Kontaktflächenrandes (14) im Bereich der Randschmalseite (1 1 ) kleiner ist als die Höhe h3 des Randes (9) im Bereich der Randbreitseite (10). the height h of the contact surface edge (14) in the region of the edge narrow side (1 1) is smaller than the height h 3 of the edge (9) in the region of the edge broadside (10).
5. Wärmetauscher nach einem der Ansprüche 1 bis 4,  5. Heat exchanger according to one of claims 1 to 4,
dadurch gekennzeichnet, characterized,
dass die Ausnehmung (13) direkt an der Randschmalseite (1 1 ) anliegt. the recess (13) bears directly against the edge narrow side (1 1).
6. Boden (7) für einen Wärmetauscher (1 ) nach einem der Ansprüche 1 bis 5, mit einer Durchgangsöffnung (6) zur Aufnahme eines Flachrohrs (3), wobei6. bottom (7) for a heat exchanger (1) according to one of claims 1 to 5, with a passage opening (6) for receiving a flat tube (3), wherein
- die Durchgangsöffnung (6) einen aufgestellten Rand (9) aufweist, - The passage opening (6) has a raised edge (9),
- die Randbreitseiten (10) höher sind als die Randschmalseiten (1 1 ) und über eine entsprechende Neigung (12) ineinander übergehen,  - The edge broad sides (10) are higher than the narrow edges (1 1) and pass over a corresponding inclination (12) into each other,
- im Bereich der Neigung (12) eine Ausnehmung (13) vorgesehen ist, deren Höhe (hi) geringer ist als die Höhe (h2) der Randschmalseite (1 1 ). - In the region of the inclination (12) is provided a recess (13) whose height (hi) is less than the height (h 2 ) of the narrow edge side (1 1).
7. Boden nach Anspruch 6, 7. floor according to claim 6,
dadurch gekennzeichnet, characterized,
dass die Höhe (hi) der Ausnehmung (13) ca. der Hälfte der Höhe (h3) der Randbreitseite (10) entspricht. the height (hi) of the recess (13) corresponds to approximately half the height (h 3 ) of the edge broadside (10).
8. Boden nach Anspruch 6 oder 7, 8. Floor according to claim 6 or 7,
dadurch gekennzeichnet, dass die Höhe (h3) der Randbreitseite (10) ca. 7 mm beträgt. characterized, that the height (h 3 ) of the edge broadside (10) is approximately 7 mm.
9. Boden nach einem der Ansprüche 6 bis 8, 9. Floor according to one of claims 6 to 8,
dadurch gekennzeichnet, characterized,
dass die Höhe (hi) der Ausnehmung (13) ca. 3,5 mm beträgt. the height (hi) of the recess (13) is approximately 3.5 mm.
10. Boden nach einem der Ansprüche 6 bis 9, 10. Floor according to one of claims 6 to 9,
dadurch gekennzeichnet, characterized,
dass die Ausnehmung (13) direkt an der Randschmalseite (1 1 ) anliegt. the recess (13) bears directly against the edge narrow side (1 1).
***** *****
EP13783291.1A 2012-10-22 2013-10-21 Heat exchanger Not-in-force EP2909562B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012219268.9A DE102012219268A1 (en) 2012-10-22 2012-10-22 heat exchangers
PCT/EP2013/071943 WO2014064036A1 (en) 2012-10-22 2013-10-21 Heat exchanger

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EP2909562B1 EP2909562B1 (en) 2016-09-28

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US (1) US10215502B2 (en)
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BR (1) BR112015008246B1 (en)
CA (1) CA2881876A1 (en)
DE (1) DE102012219268A1 (en)
WO (1) WO2014064036A1 (en)

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CN108571378A (en) * 2018-06-14 2018-09-25 东风贝洱热系统有限公司 A kind of main chip of intercooler of automobile

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JP3822958B2 (en) * 1997-08-04 2006-09-20 サンデン株式会社 Manufacturing method of heat exchanger
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BR112015008246B1 (en) 2020-11-17
CA2881876A1 (en) 2014-05-01
US20150292813A1 (en) 2015-10-15
US10215502B2 (en) 2019-02-26
EP2909562B1 (en) 2016-09-28
BR112015008246A2 (en) 2017-07-04
CN104704314A (en) 2015-06-10
DE102012219268A1 (en) 2014-04-24

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