EP2927632A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP2927632A1
EP2927632A1 EP15162148.9A EP15162148A EP2927632A1 EP 2927632 A1 EP2927632 A1 EP 2927632A1 EP 15162148 A EP15162148 A EP 15162148A EP 2927632 A1 EP2927632 A1 EP 2927632A1
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EP
European Patent Office
Prior art keywords
tube
heat exchanger
exchanger according
tubes
collecting
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.)
Withdrawn
Application number
EP15162148.9A
Other languages
German (de)
French (fr)
Inventor
Hicham Rouhana
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
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Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2927632A1 publication Critical patent/EP2927632A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • 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
    • F28F9/0229—Double end plates; Single end plates with hollow spaces
    • 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
    • F28D1/047—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 bent, e.g. in a serpentine or zig-zag
    • F28D1/0475—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 bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend
    • F28D1/0476—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 bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend the conduits having a non-circular cross-section
    • 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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • 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

Definitions

  • the invention relates to a heat exchanger, in particular for motor vehicles.
  • Heat exchangers are well known in the art.
  • tube bundles of flat tubes are usually provided, the pipe ends passing through openings in a collection box and there are soldered to the collection box.
  • failures occur in the pipe / box connection. It shows that the failures usually occur on the narrow pipe side of the pipe / box connection.
  • the object of the present invention is achieved with a heat exchanger according to claim 1.
  • An embodiment of the invention relates to a heat exchanger with at least one collecting box with a plurality of tube openings and with a tube bundle of tubes, wherein the ends of the tubes engage in openings of the collecting box, wherein the tubes have a broad side with the length L1 with opposite tube side walls and two end narrow sides having the width Io each having a pipe wall arc, wherein the pipe wall arc has a diameter I1 which is greater than the distance of the opposite pipe side walls.
  • the pipe wall arch has a circular segment-like contour. This increases the pressure stability and at the same time increases the solderable area on the formwork side, which improves the stability of the soldering.
  • the pipe wall sheet has a diameter I1 which is greater by at least 10%, preferably more than 15% or more greater than the distance Io of the opposite pipe side walls, thus, an area for the soldering is provided, which is a significant increase in stability leads.
  • the openings of the collecting tank have the same contour as the contour of the pipe.
  • the opening also has an approximately bony contour on, with an elongated central portion and circular end portions.
  • each tube end engages in each case an opening of one of the two headers.
  • a collecting box is provided, wherein the tubes are designed bent such that each tube end of a tube engages in each case an opening of a collecting tank.
  • the openings of the collecting tank or the collecting tanks have a raised edge as a passage, which is directed inwards in the collecting tanks or outwardly from the collecting box.
  • the solderable surface is increased, which in turn improves the stability of the connection between the pipe and opening.
  • the collecting box has a tube bottom and a box lid, wherein the openings are made in the tubesheet.
  • FIG. 1 shows a schematic view of an opening 1 of a collecting tank 2, preferably in a tube plate 3 of the collecting tank 2, wherein the opening has a preferably circumferential raised edge 4 as a passage.
  • a tube 5 is inserted with its pipe end 6 and soldered to the raised edge 4.
  • the edge 4 has approximately the height H.
  • the edge 4 or the passage can protrude into both the collection box 2 and alternatively protrude away from the interior of the header 2, ie in the direction of the tube bundle.
  • FIG. 2 shows a schematic view of an opening 10 in a collection box 11 according to the prior art.
  • the contour of the opening corresponds to the contour of a flat tube having a substantially rectangular cross-sectional area with a broad side with the length Lo and a narrow side with the width Io. On the narrow sides, the contour is rounded.
  • the cross-sectional area is approximately Lo * Io.
  • FIG. 3 shows a schematic view of an opening 20 in a collecting box 21 according to the invention.
  • the contour of the opening corresponds to the contour of a flat tube having a substantially rectangular cross-sectional area with a broad side with the length L1 and a narrow side with the width Io, softer further provided on the narrow sides of a pipe wall arc, which has a diameter I1, which is larger as the width Io in the middle region of the opening.
  • I1 is preferably greater than or equal to 1.1 * 10.
  • the length L1 of the opening 20 is less than or equal to the length of the opening Lo according to the prior art, so that the cross-sectional area of the opening 20 is greater than or equal to the cross-sectional area of the tube 10.
  • the opening shown has the contour shown, wherein the tube used has the same contour as the contour of the opening. This results in a larger contact surface between the opening and the tube, so that when soldering a larger area is connected together and thus a more stable connection is generated.
  • the tubes 33, 42 in this case have a broad side with the length L1 with opposite tube side walls and two end narrow sides with the width Io, each with a pipe wall arch, wherein the pipe wall arch has a diameter I1 which is greater than the distance Io of the opposite pipe side walls.
  • the pipe wall arch has a circular segment-like contour.
  • the pipe wall arch has a diameter I1 which is greater than or equal to 10%, preferably 15% or more, than the distance Io of the opposite pipe side walls, so that the following applies: I1 ⁇ 1.1 * Io or I1 ⁇ 1.15 * io.
  • the tubes therefore experience at their lateral edge regions, on the narrow sides, an extension which is arc-shaped, circular arc-shaped or circular segment-shaped and which has a diameter which is greater than the width of the tube in the central region.
  • the tube is thereby extended approximately bone-shaped.
  • This extension can be present only at the end of the pipe, which in the opening or, alternatively, the extension may be over the entire length of the tube.
  • FIGS. 4 and 5 show alternative designs of heat exchangers 30, 40. It is in FIG. 4 a heat exchanger 30 with two manifolds 31, 32 shown, each tube 33 are arranged with its two pipe ends 35 such that in each case a pipe end 35 engages in each case an opening 36 in one of the two manifolds 31, 32.
  • FIG. 5 a heat exchanger 40 is shown with only one collecting box 41, wherein each tube 42 are formed and arranged with its two pipe ends 43 such that in each case a pipe end 43 engages in each case an opening 44 of the same collecting tank 41.
  • a conventional manner in the collecting box 41 at least one partition wall is provided, which is not shown here.
  • Corrugated ribs 37, 45 could continue to be provided between the tubes.

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

Abstract

Die Erfindung betrifft einen Wärmetauscher mit zumindest einem Sammelkasten mit einer Vielzahl von Rohröffnungen und mit einem Rohrbündel von Rohren, wobei die Enden der Rohre in Öffnungen des Sammeikastens eingreifen, wobei die Rohre eine Breitseite mit der Länge L mit gegenüberliegenden Rohrseitenwänden und zwei endseitigen Schmalseiten mit der Breite B mit jeweils einem Rohr-wandbogen aufweisen, wobei der Rohrwandbogen einen Durchmesser aufweist, der größer ist als der Abstand der gegenüberliegenden Rohrseitenwände.The invention relates to a heat exchanger with at least one collecting box with a plurality of tube openings and with a tube bundle of tubes, wherein the ends of the tubes engage in openings of the Sammeikastens, the tubes having a broad side with the length L with opposite tube side walls and two end narrow sides with the Have width B, each with a pipe wall arc, wherein the pipe wall arc has a diameter which is greater than the distance of the opposite pipe side walls.

Description

Technisches GebietTechnical area

Die Erfindung betrifft einen Wärmetauscher, insbesondere für Kraftfahrzeuge.The invention relates to a heat exchanger, in particular for motor vehicles.

Stand der TechnikState of the art

Wärmetauscher sind im Stand der Technik hinlänglich bekannt. Dabei sind in der Regel Rohrbündel von Flachrohren vorgesehen, wobei die Rohrenden durch Öffnungen in einen Sammelkasten reichen und dort mit dem Sammelkasten verlötet sind. Bei Thermowechsel bzw. bei thermischer Belastung auf Zug/Druck treten Risse, also Ausfälle, im Bereich der Rohr/Kastenverbindung auf. Dabei zeigt sich, dass die Ausfälle in der Regel an der Rohrschmalseite der Rohr/Kastenverbindung auftreten.Heat exchangers are well known in the art. In this case, tube bundles of flat tubes are usually provided, the pipe ends passing through openings in a collection box and there are soldered to the collection box. When changing the temperature or thermal stress on train / pressure cracks, so failures occur in the pipe / box connection. It shows that the failures usually occur on the narrow pipe side of the pipe / box connection.

Es ist weiterhin die DE 2839142 bekannt geworden, bei welcher Ovalrohre bei einem Wärmetauscher eingesetzt werden, wobei die langen Rohrseitenwände elastisch verspannt sind und damit eine nach innen gewölbte Konkave Seitenwand bilden.It is still the DE 2839142 have become known in which oval tubes are used in a heat exchanger, wherein the long tube side walls are elastically braced and thus form an inwardly curved concave side wall.

Darstellung der Erfindung, Aufgabe, Lösung, VorteilePresentation of the invention, object, solution, advantages

Daher ist es die Aufgabe der vorliegenden Erfindung, einen Wärmetauscher zu schaffen, welcher insbesondere im Hinblick auf die Anforderungen bei Thermowechseln verbessert ist.Therefore, it is the object of the present invention to provide a heat exchanger, which is improved in particular with regard to the requirements for thermal changes.

Die Aufgabe der vorliegenden Erfindung wird mit einem Wärmetauscher gemäß Anspruch 1 gelöst.The object of the present invention is achieved with a heat exchanger according to claim 1.

Ein Ausführungsbeispiel der Erfindung betrifft einen Wärmetauscher mit zumindest einem Sammelkasten mit einer Vielzahl von Rohröffnungen und mit einem Rohrbündel von Rohren, wobei die Enden der Rohre in Öffnungen des Sammelkastens eingreifen, wobei die Rohre eine Breitseite mit der Länge L1 mit gegenüberliegenden Rohrseitenwänden und zwei endseitigen Schmalseiten mit der Breite Io mit jeweils einem Rohrwandbogen aufweisen, wobei der Rohrwandbogen einen Durchmesser I1 aufweist, der größer ist als der Abstand der gegenüberliegenden Rohrseitenwände. Dadurch wird an den Schmalseiten des Rohrs im Bereich der Rohr-Öffnungsverbindung eine größere Fläche zur Verfügung gestellt, welche verlötet werden kann, so dass eine stabilere Verbindung erzeugt wird, die insbesondere auch bei Thermowechseln stabiler ist.An embodiment of the invention relates to a heat exchanger with at least one collecting box with a plurality of tube openings and with a tube bundle of tubes, wherein the ends of the tubes engage in openings of the collecting box, wherein the tubes have a broad side with the length L1 with opposite tube side walls and two end narrow sides having the width Io each having a pipe wall arc, wherein the pipe wall arc has a diameter I1 which is greater than the distance of the opposite pipe side walls. As a result, a larger area is provided on the narrow sides of the tube in the region of the tube-opening connection, which can be soldered, so that a more stable connection is produced, which is more stable especially in the case of thermal changes.

Dabei ist es vorteilhaft, wenn der Rohrwandbogen eine kreissegmentartige Kontur aufweist. Damit wird die Druckstabilität erhöht und gleichzeitig an der Schalseite die verlötbare Fläche erhöht, was die Stabilität der Verlötung verbessert.It is advantageous if the pipe wall arch has a circular segment-like contour. This increases the pressure stability and at the same time increases the solderable area on the formwork side, which improves the stability of the soldering.

Besonders vorteilhaft ist es, wenn der Rohrwandbogen einen Durchmesser I1 aufweist, der um mindestens 10%, vorzugsweise mehr als 15% oder mehr größer ist als der Abstand Io der gegenüberliegenden Rohrseitenwände, Dadurch wird eine Fläche für die Verlötung zur Verfügung gestellt, die zu einer deutlichen Stabilitätssteigerung führt.It when the pipe wall sheet has a diameter I1 which is greater by at least 10%, preferably more than 15% or more greater than the distance Io of the opposite pipe side walls, Thus, an area for the soldering is provided, which is a significant increase in stability leads.

Auch ist es zweckmäßig, wenn die Öffnungen des Sammelkastens die gleiche Kontur aufweisen, wie die Kontur des Rohrs. Dadurch weist die Öffnung ebenso eine etwa knochenförmige Kontur auf, mit einem länglichen Mittelteil und kreisförmigen Endbereichen.It is also expedient if the openings of the collecting tank have the same contour as the contour of the pipe. As a result, the opening also has an approximately bony contour on, with an elongated central portion and circular end portions.

Vorteilhaft ist es, wenn zwei Sammelkästen vorgesehen sind, wobei jedes Rohrende in jeweils eine Öffnung einer der beiden Sammelkästen eingreift. Alternativ ist es vorteilhaft, wenn ein Sammelkasten vorgesehen ist, wobei die Rohre derart gebogen ausgeführt sind, dass jedes Rohrende eines Rohrs in jeweils eine Öffnung des einen Sammelkastens eingreift.It is advantageous if two manifolds are provided, each tube end engages in each case an opening of one of the two headers. Alternatively, it is advantageous if a collecting box is provided, wherein the tubes are designed bent such that each tube end of a tube engages in each case an opening of a collecting tank.

Zur Verbesserung der Rohr-Öffnungsverbindung ist es vorteilhaft, wenn die Öffnungen des Sammelkastens oder der Sammelkästen einen hochgestellten Rand als Durchzug aufweisen, welcher nach innen in den Sammelkästen oder nach außen vom Sammelkasten weg gerichtet ist. Dadurch wird die verlötbare Fläche vergrößert, was wiederum die Stabilität der Verbindung zwischen Rohr und Öffnung verbessert.To improve the pipe-opening connection, it is advantageous if the openings of the collecting tank or the collecting tanks have a raised edge as a passage, which is directed inwards in the collecting tanks or outwardly from the collecting box. As a result, the solderable surface is increased, which in turn improves the stability of the connection between the pipe and opening.

Besonders vorteilhaft ist es, wenn die Rohrseitenwände eines Rohrs im Wesentlichen parallel zueinander angeordnet sind. Dies führt zu einer verbesserte Herstellbarkeit, weil die Kontur gut kalibrierbar ist.It when the tube side walls of a tube are arranged substantially parallel to each other is particularly advantageous. This leads to an improved manufacturability, because the contour is well calibrated.

Auch ist es zweckmäßig, wenn der Sammelkasten einem Rohrboden und einen Kastendeckel aufweist, wobei die Öffnungen in dem Rohrboden eingebracht sind.It is also expedient if the collecting box has a tube bottom and a box lid, wherein the openings are made in the tubesheet.

Vorteilhafte Weiterbildungen der vorliegenden Erfindung sind in den Unteransprüchen und der nachfolgenden Figurenbeschreibung beschrieben.Advantageous developments of the present invention are described in the subclaims and the following description of the figures.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Im Folgenden wird die Erfindung anhand von einem Ausführungsbeispiel unter Bezugnahme auf eine Zeichnung detailliert erläutert. In der Zeichnung zeigt:

Fig.1
eine schematische Ansicht einer Öffnung eines Sammelkastens mit umlaufendem hochgestellten Rand als Durchzug mit einem darin ausgenommenen Rohrende,
Fig.2
eine schematische Ansicht einer Öffnung eines Sammelkastens nach dem Stand der Technik,
Fig.3
eine schematische Ansicht einer erfindungsgemäßen Öffnung eines Sammelkastens,
Fig.4
eine schematische Ansicht eines Wärmetauschers mit Sammelkästen und Rohren, und
Fig.5
eine schematische Ansicht eines alternativen Wärmetauschers mit Sammelkästen und Rohren.
In the following the invention with reference to an embodiment with reference to a drawing will be explained in detail. In the drawing shows:
Fig.1
a schematic view of an opening of a collecting tank with circumferential raised edge as a passage with a pipe end recessed therein,
Fig.2
a schematic view of an opening of a collecting tank according to the prior art,
Figure 3
a schematic view of an opening according to the invention a collecting box,
Figure 4
a schematic view of a heat exchanger with headers and pipes, and
Figure 5
a schematic view of an alternative heat exchanger with headers and pipes.

Bevorzugte Ausführung der ErfindungPreferred embodiment of the invention

Die Figur 1 zeigt eine schematische Ansicht einer Öffnung 1 eines Sammelkastens 2, bevorzugt in einem Rohrboden 3 des Sammelkastens 2, wobei die Öffnung einen bevorzugt umlaufenden hochgestellten Rand 4 als Durchzug aufweist. In diese Öffnung 1 ist ein Rohr 5 mit seinem Rohrende 6 eingesteckt und mit dem hochgestellten Rand 4 verlötet. Der Rand 4 hat dabei etwa die Höhe H. Der Rand 4 bzw. der Durchzug kann dabei sowohl in den Sammelkasten 2 hineinragen als auch alternativ vom Inneren des Sammelkastens 2 weg ragen, also in Richtung des Rohrbündels.The FIG. 1 shows a schematic view of an opening 1 of a collecting tank 2, preferably in a tube plate 3 of the collecting tank 2, wherein the opening has a preferably circumferential raised edge 4 as a passage. In this opening 1, a tube 5 is inserted with its pipe end 6 and soldered to the raised edge 4. The edge 4 has approximately the height H. The edge 4 or the passage can protrude into both the collection box 2 and alternatively protrude away from the interior of the header 2, ie in the direction of the tube bundle.

Die Figur 2 zeigt eine schematische Ansicht einer Öffnung 10 in einem Sammelkasten 11 nach dem Stand der Technik. Die Kontur der Öffnung entspricht der Kontur eines Flachrohrs mit einer im Wesentlichen rechteckigen Querschnittsfläche mit einer Breitseite mit der Länge Lo und einer Schmalseite mit der Breite Io. An den Schmalseiten ist die Kontur abgerundet. Die Querschnittsfläche ist dabei etwa Lo * Io.The FIG. 2 shows a schematic view of an opening 10 in a collection box 11 according to the prior art. The contour of the opening corresponds to the contour of a flat tube having a substantially rectangular cross-sectional area with a broad side with the length Lo and a narrow side with the width Io. On the narrow sides, the contour is rounded. The cross-sectional area is approximately Lo * Io.

Die Figur 3 zeigt eine schematische Ansicht einer Öffnung 20 in einem Sammelkasten 21 gemäß der Erfindung. Die Kontur der Öffnung entspricht der Kontur eines Flachrohrs mit einer im Wesentlichen rechteckigen Querschnittsfläche mit einer Breitseite mit der Länge L1 und einer Schmalseite mit der Breite Io, bei weicher weiterhin an den Schmalseiten ein Rohrwandbogen vorgesehen ist, welcher einen Durchmesser I1 aufweist, welcher größer ist als die Breite Io im mittleren Bereich der Öffnung. Dabei ist I1 bevorzugt größer oder gleich 1,1 * Io. Alternativ ist es vorteilhaft, wenn I1 ≥ 1,15 *Io oder größer ist.The FIG. 3 shows a schematic view of an opening 20 in a collecting box 21 according to the invention. The contour of the opening corresponds to the contour of a flat tube having a substantially rectangular cross-sectional area with a broad side with the length L1 and a narrow side with the width Io, softer further provided on the narrow sides of a pipe wall arc, which has a diameter I1, which is larger as the width Io in the middle region of the opening. In this case, I1 is preferably greater than or equal to 1.1 * 10. Alternatively, it is advantageous if I1 ≥ 1.15 * Io or greater.

Dabei ist es bevorzugt, wenn die Länge L1 der Öffnung 20 kleiner oder gleich der Länge der Öffnung Lo nach dem Stand der Technik ist, so dass die Querschnittsfläche der Öffnung 20 größer oder gleich der Querschnittsfläche des Rohrs 10 ist.It is preferred if the length L1 of the opening 20 is less than or equal to the length of the opening Lo according to the prior art, so that the cross-sectional area of the opening 20 is greater than or equal to the cross-sectional area of the tube 10.

Die gezeigte Öffnung weist die dargestellte Kontur auf, wobei das verwendete Rohr die gleiche Kontur aufweist, wie die Kontur der Öffnung. Dadurch ergibt sich eine größere Anlagefläche zwischen Öffnung und Rohr, so dass beim Verlöten eine größere Fläche miteinander verbunden wird und damit eine stabilere Verbindung erzeugt wird. Die Rohre 33, 42 weisen dabei eine Breitseite mit der Länge L1 mit gegenüberliegenden Rohrseitenwänden und zwei endseitigen Schmalseiten mit der Breite Io mit jeweils einem Rohrwandbogen auf, wobei der Rohrwandbogen einen Durchmesser I1 aufweist, der größer ist als der Abstand Io der gegenüberliegenden Rohrseitenwände. Der Rohrwandbogen weist dabei eine kreissegmentartige Kontur auf. Dabei weist der Rohrwandbogen einen Durchmesser I1 auf, der um 10%, vorzugsweise um 15% oder mehr größer oder gleich ist als der Abstand Io der gegenüberliegenden Rohrseitenwände, so dass gilt: I1 ≥ 1,1 * Io oder I1 ≥ 1,15 * Io.The opening shown has the contour shown, wherein the tube used has the same contour as the contour of the opening. This results in a larger contact surface between the opening and the tube, so that when soldering a larger area is connected together and thus a more stable connection is generated. The tubes 33, 42 in this case have a broad side with the length L1 with opposite tube side walls and two end narrow sides with the width Io, each with a pipe wall arch, wherein the pipe wall arch has a diameter I1 which is greater than the distance Io of the opposite pipe side walls. The pipe wall arch has a circular segment-like contour. In this case, the pipe wall arch has a diameter I1 which is greater than or equal to 10%, preferably 15% or more, than the distance Io of the opposite pipe side walls, so that the following applies: I1 ≥ 1.1 * Io or I1 ≥ 1.15 * io.

Die Rohre erfahren daher an ihren seitlichen Randbereichen, an den Schmalseiten, eine Erweiterung, die bogenförmig, kreisbogenförmig oder kreissegmentförmig ausgebildet ist und die einen Durchmesser aufweist, welcher größer ist als die Breite des Rohrs im mittleren Bereich. Das Rohr wird dadurch etwa knochenförmig erweitert. Dabei kann diese Erweiterung nur am Rohrende vorliegen, welches in die Öffnung eingesteckt wird oder alternativ kann die Erweiterung über die gesamte Länge des Rohrs vorliegen.The tubes therefore experience at their lateral edge regions, on the narrow sides, an extension which is arc-shaped, circular arc-shaped or circular segment-shaped and which has a diameter which is greater than the width of the tube in the central region. The tube is thereby extended approximately bone-shaped. This extension can be present only at the end of the pipe, which in the opening or, alternatively, the extension may be over the entire length of the tube.

Die Figuren 4 und 5 zeigen alternative Gestaltungen von Wärmetauschern 30, 40. Dabei ist in Figur 4 ein Wärmetauscher 30 mit zwei Sammelkästen 31, 32 dargestellt, wobei jedes Rohr 33 mit seinen beiden Rohrenden 35 derart angeordnet sind, dass jeweils ein Rohrende 35 in jeweils eine Öffnung 36 in einer der beiden Sammelkästen 31, 32 eingreift.The FIGS. 4 and 5 show alternative designs of heat exchangers 30, 40. It is in FIG. 4 a heat exchanger 30 with two manifolds 31, 32 shown, each tube 33 are arranged with its two pipe ends 35 such that in each case a pipe end 35 engages in each case an opening 36 in one of the two manifolds 31, 32.

Alternativ ist in Figur 5 ein Wärmetauscher 40 mit nur einem Sammelkasten 41 dargestellt, wobei jedes Rohr 42 mit seinen beiden Rohrenden 43 derart geformt und angeordnet sind, dass jeweils ein Rohrende 43 in jeweils eine Öffnung 44 des gleichen Sammelkastens 41 eingreift. Zur Fluidtrennung ist dabei üblicher Weise in dem Sammelkasten 41 zumindest eine Trennwand vorgesehen, welche hier jedoch nicht gezeigt ist. Dabei kann man je nach Ausführung der Rohre 42 eine Umlenkung in der Breite oder in der Tiefe oder Kombinationen hiervon realisieren.Alternatively, in FIG. 5 a heat exchanger 40 is shown with only one collecting box 41, wherein each tube 42 are formed and arranged with its two pipe ends 43 such that in each case a pipe end 43 engages in each case an opening 44 of the same collecting tank 41. For fluid separation, a conventional manner in the collecting box 41 at least one partition wall is provided, which is not shown here. Depending on the design of the tubes 42, it is possible to realize a deflection in the width or in the depth or combinations thereof.

Zwischen den Rohren könne weiterhin Wellrippen 37, 45 vorgesehen sein.Corrugated ribs 37, 45 could continue to be provided between the tubes.

Claims (9)

Wärmetauscher (30,40) mit zumindest einem Sammelkasten (31,32,41) mit einer Vielzahl von Rohröffnungen (20,36,44) und mit einem Rohrbündel von Rohren (33,42), wobei die Enden (35,43) der Rohre in die Rohröffnungen (20,36,44) des Sammelkastens (31,32,41) eingreifen, wobei die Rohre (33,42) eine Breitseite mit der Länge L1 mit gegenüberliegenden Rohrseitenwänden und zwei endseitigen Schmalseiten mit der Breite Io mit jeweils einem Rohrwandbogen aufweisen, dadurch gekennzeichnet, dass der Rohrwandbogen einen Durchmesser I1 aufweist, der größer ist als der Abstand Io der gegenüberliegenden Rohrseitenwände.A heat exchanger (30, 40) comprising at least one collecting box (31, 32, 41) having a multiplicity of tube openings (20, 36, 44) and a tube bundle of tubes (33, 42), the ends (35, 43) of Engage tubes in the tube openings (20,36,44) of the collecting box (31,32,41), wherein the tubes (33,42) has a broad side with the length L1 with opposite tube side walls and two end narrow sides with the width Io with one each Have pipe wall arch, characterized in that the pipe wall arc has a diameter I1 which is greater than the distance Io of the opposite pipe side walls. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass der Rohrwandbogen eine kreissegmentartige Kontur aufweist.Heat exchanger according to claim 1, characterized in that the pipe wall arc has a circular segment-like contour. Wärmetauscher nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Rohrwandbogen einen Durchmesser 11 aufweist, der um 10%, vorzugsweise 15% oder mehr größer ist als der Abstand Io der gegenüberliegenden Rohrseitenwände.Heat exchanger according to claim 1 or 2, characterized in that the pipe wall sheet has a diameter 11 which is greater by 10%, preferably 15% or more than the distance Io of the opposite pipe side walls. Wärmetauscher nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Öffnungen (20) des Sammelkastens die gleiche Kontur aufweisen, wie die Kontur des Rohrs.Heat exchanger according to claim 1, 2 or 3, characterized in that the openings (20) of the collecting box have the same contour as the contour of the tube. Wärmetauscher nach Anspruch 1, 2, 3 oder 4, dadurch gekennzeichnet, dass zwei Sammelkästen (31,32) vorgesehen sind, wobei jedes Rohrende (35) in jeweils eine Öffnung (36) einer der beiden Sammelkästen eingreift.Heat exchanger according to claim 1, 2, 3 or 4, characterized in that two collecting boxes (31,32) are provided, wherein each tube end (35) engages in each case an opening (36) of one of the two collecting tanks. Wärmetauscher nach Anspruch 1, 2, 3 oder 4, dadurch gekennzeichnet, dass ein Sammelkasten (41) vorgesehen ist, wobei die Rohre (42) derart gebogen oder geformt ausgeführt sind, dass jedes Rohrende (43) eines Rohrs (42) in jeweils eine Öffnung (44) des einen Sammelkastens (41) eingreift.Heat exchanger according to claim 1, 2, 3 or 4, characterized in that a collecting box (41) is provided, wherein the tubes (42) are designed bent or shaped such that each tube end (43) of a tube (42) in each case one Opening (44) of a collecting tank (41) engages. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Öffnungen (20) des Sammelkastens (21,41) oder der Sammelkästen (31,32) einen hochgestellten Rand (4) als Durchzug aufweisen, welcher nach innen in den Sammelkasten oder nach außen vom Sammelkasten weg gerichtet ist.Heat exchanger according to one of the preceding claims, characterized in that the openings (20) of the collecting box (21,41) or the collecting boxes (31,32) have a raised edge (4) as a passage, which inwardly into the collecting box or to the outside directed away from the collector box. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Rohrseitenwände eines Rohrs im Wesentlichen parallel zueinander angeordnet sind.Heat exchanger according to one of the preceding claims, characterized in that the tube side walls of a tube are arranged substantially parallel to each other. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Sammelkästen (21) einem Rohrboden (3) und einen Kastendeckel aufweist, wobei die Öffnungen in dem Rohrboden (3) eingebracht sind.Heat exchanger according to one of the preceding claims, characterized in that the collecting boxes (21) has a tube plate (3) and a box lid, wherein the openings in the tube plate (3) are introduced.
EP15162148.9A 2014-04-04 2015-04-01 Heat exchanger Withdrawn EP2927632A1 (en)

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US10401097B2 (en) 2019-09-03
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CN104976903B (en) 2019-01-01

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