EP1148312A1 - Radiator for vehicles - Google Patents

Radiator for vehicles Download PDF

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Publication number
EP1148312A1
EP1148312A1 EP01107034A EP01107034A EP1148312A1 EP 1148312 A1 EP1148312 A1 EP 1148312A1 EP 01107034 A EP01107034 A EP 01107034A EP 01107034 A EP01107034 A EP 01107034A EP 1148312 A1 EP1148312 A1 EP 1148312A1
Authority
EP
European Patent Office
Prior art keywords
flat tubes
flat
longitudinal
tube
flat tube
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
EP01107034A
Other languages
German (de)
French (fr)
Other versions
EP1148312B1 (en
Inventor
Bernhard Lamich
Viktor Brost
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.)
Modine Manufacturing Co
Original Assignee
Modine Manufacturing Co
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
Priority claimed from DE2000119268 external-priority patent/DE10019268A1/en
Priority claimed from DE2000160006 external-priority patent/DE10060006A1/en
Application filed by Modine Manufacturing Co filed Critical Modine Manufacturing Co
Publication of EP1148312A1 publication Critical patent/EP1148312A1/en
Application granted granted Critical
Publication of EP1148312B1 publication Critical patent/EP1148312B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F28F9/04—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
    • 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
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0082—Charged air coolers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49373—Tube joint and tube plate structure

Definitions

  • the invention relates to a heat exchanger for motor vehicles with a finned tube block consisting of flat tubes with fins arranged therebetween, the shaped ends of the flat tubes opening into opposite collecting or deflection boxes and being connected to one another with the long sides of the shaped ends, the ends being connected the flat tubes are in contact with the connecting edges of the collecting or deflection boxes and are connected by means of soldering.
  • the invention further relates to a method for producing such heat exchangers, in which the finned tube block is soldered to the header or deflection boxes at the same time.
  • a disadvantage of the prior art mentioned is the considerable degree of deformation to which the pipe ends are subjected, which is why high-quality materials are necessary.
  • the flat tubes have rectangularly shaped ends, the large diameter of the rectangles generally being much smaller than the large diameter of the flat tubes. This constriction leads to fluidic disadvantages.
  • the German application No. 100 16 113.8 recently filed by the applicant has already alleviated or eliminated the disadvantages mentioned.
  • the present patent application seeks alternative solutions which offer the possibility of using welded or drawn flat tubes and which, moreover, are also intended to eliminate the disadvantages mentioned.
  • the ends of welded or extruded or drawn flat tubes have a separating cut which divides the ends of the flat tubes into two parts, that at least one of the parts of each flat tube has a bend transversely to the longitudinal direction which leads to a connecting surface between The long side of the flat tube and the long side of the part of the adjacent flat tube leads and that the collecting or deflection boxes with their connecting edges extend over the bend and the cut section and are connected to the narrow sides of the flat tubes.
  • the flat tubes are welded have one or more longitudinal beads, which form a plurality of flow channels in the flat tube, wherein the longitudinal beads within the separated section are eliminated by forming. Welded flat tubes are cheaper than drawn flat tubes.
  • the material of the longitudinal beads within the cut-off section is pressed outwards into the longitudinal edges, as a result of which the connecting surfaces which form at the ends of the adjacent flat tubes are smooth and pose little problem with regard to a tight soldered connection.
  • This claim is only optional.
  • the longitudinal seam is arranged outside the separating cut, preferably on a long side of the flat tube, in the vicinity of a narrow side of the flat tube. This simplifies the application of the separating cut.
  • the flat tubes are drawn or extruded tubes and have one or more longitudinal walls for subdivision into several flow channels. This is particularly advantageous with coolant coolers.
  • longitudinal beads or longitudinal walls can be dispensed with. An indoor insert is provided for this case.
  • Claim 7 provides that both ends or both parts of each flat tube each have two bends arranged transversely to the longitudinal direction of the flat tube, the one bend being arranged approximately where the connecting surface of the long side of the one flat tube begins with the long side of the adjacent flat tube and the other bend is provided approximately where the cut section of the flat tubes begins or ends.
  • the separating cut is preferably arranged parallel to the long sides of each flat tube, so that both end faces of the flat tube are separated.
  • claim 1 also includes designs with only one bend, namely that at the end of the cut section where the flat tube begins. Where the connection surface begins, there may also be a gradual transition into the connection surface.
  • Claim 8 alternatively provides that only one of the parts mentioned has a bend and the other part remains smooth.
  • the long sides of the flat tubes are essentially smooth on the side on which they form a connecting surface with the long side of the adjacent flat tube. It is advantageous if one or more pressure joining points are arranged between the long sides or in the connecting surface.
  • the method according to the invention provides that the ends of the flat tubes are separated and at least one of the two parts of each flat tube formed after the separation is bent transversely to the longitudinal direction of the flat tubes in order to form a connecting surface with the longitudinal side of the adjacent flat tube that the collecting or Deflection boxes with their connecting edges are pushed over the ribbed flat tube block and the connecting edges are connected to the narrow sides of the separated parts of the flat tubes.
  • the separation can be carried out with a laser beam or a liquid jet or by means of conventional separating means and is preferably carried out parallel to the long sides of the flat tubes, exactly in the middle between the two long sides. It is preferably provided that both parts of the flat tubes are bent once or twice transversely to the longitudinal direction of the flat tubes.
  • the at least one separating cut is arranged outside the center line on at least one of the two narrow sides. The separating cut should preferably be arranged parallel to both long sides of the flat tube, that is to say on both narrow sides outside their center line.
  • the attachment of at least one off-center separating cut is very advantageous for heat exchangers with flat tubes with somewhat wider narrow sides, because the narrower, separated part of the ends of the flat tubes can be shaped or bent more easily.
  • Claim 13 provides for two, preferably parallel, eccentric separating cuts to be arranged in the narrow sides of the ends of the flat tubes, the central part resulting from the separating cuts remaining undeformed and both lateral parts being bent so that their long sides lie against the long sides of adjacent flat tube ends.
  • the cutout is preferably carried out with a tool with which the Cut out in both opposite narrow sides in one operation can.
  • the subsequent turning of the narrow parts can be done simultaneously the attachment of the cutout, but also later, after the assembly of the Ribs - flat tube blocks.
  • the coolers 1 consist of flat tubes 2 and corrugated fins 3 arranged between them .
  • the corrugated fins 3 were not shown in FIGS. 1 and 2, but can be seen, for example, in FIG. 3.
  • the partial view in FIG. 1 shows only one header box 5.
  • the other header box 5 is arranged identically at the opposite ends 4 of the flat tubes 2 . All parts are made of aluminum and are coated with solder as required.
  • the collecting boxes 5 are of the simplest geometrical shape, so that their production is possible very inexpensively using known methods of forming technology.
  • Each collecting box 5 has two connecting edges 7 with which it overlaps the narrow sides 11 of the flat tubes 2 at the ends 4 in the section 12 (FIG. 2).
  • the ends 4 of the compartment tubes 2 each have a separating cut 8 .
  • the separating cut 8 runs in the direction of the large diameter D of the flat tubes 2, or parallel to the long sides 6. This has the advantage that both narrow sides 11 of the flat tubes 2 are wide enough to make a firm and tight connection with the connecting edges 7 .
  • the ends 4 of the flat tubes have two parts 2a and 2b .
  • the parts 2a and 2b are bent transversely to the longitudinal direction of the flat tubes 2 , that is to say they have two bends 9 according to FIGS. 1, 2, 3, 8, 10. As the figures show, these bends 9 are not necessarily sharp bends.
  • a bend 9 is understood to mean at least one change in direction.
  • the specific design of the bends 9 depends on the distance between the flat tubes 2 and the height of the corrugated fins 3 in the fin-tube block.
  • the turns 9 cause the longitudinal side 6 of a flat tube 2 with the longitudinal side 6 of the part 2b of the adjacent flat tube 2 are each give a compound surface 10 of the part 2a.
  • the ends 4 of the flat tubes 2 are cut open after the flat tubes 2 have been cut to length.
  • the cut flat tubes 2 can then be joined together with the corrugated fins 3 to form a fin-tube block.
  • the parts 2a and 2b can then be bent as described.
  • the collecting boxes are block 5 is mounted in such a way that their joining edges are pushed 7 on both sides over the separated portion 12 of the ends 4 of the flat tubes 2 - to the thus prepared ribs - tube.
  • the connecting edges 7 also include the bends 9 , which is particularly evident from FIG. 3.
  • the collecting boxes 5 extend with their connecting edges 7 to just below the section 12. It is also possible to make the bends 9 directly after the ends 4 of the flat tubes 2 have been separated and only then to join the finned tube block.
  • the partial view of the cooler 1 in FIG. 3 further shows that, in the embodiments described so far, both parts 2a and 2b have been bent and 2 connecting surfaces 10 form due to the abutment of the longitudinal sides 6 of adjacent flat tubes.
  • the end faces of the collecting boxes 5 are closed with a cover 20 .
  • 4 shows the section A - A through part of the cooler 1.
  • the section runs just below the cut section 12 and therefore shows the flat tubes 2, which are not cut there.
  • the flat tubes 2 have long sides 6 and narrow sides 11, the narrow sides 11 being already connected to the connecting edge 7 of the header boxes 5 in this area.
  • 5 shows a section through the connecting surfaces 10 in FIG. 3. This shows what has already been mentioned above that the longitudinal sides 6 of adjacent flat tubes 2 form the connecting surfaces 10 , namely through part 2a of a flat tube 2 and one Part 2b of the adjacent flat tube 2. Both parts 2a and 2b have bends 9 .
  • FIG. 5 shows that there is no constriction of the flow channel 16 , so that there can be no pressure loss caused thereby.
  • 7 shows an embodiment in which flat tubes 2 welded with a longitudinal seam 14 have been used.
  • the longitudinal seam 14 is located in a longitudinal wall 6 of the flat tube 2, but in relative proximity to a narrow side 11, because there is a higher rigidity in the tube, which facilitates the connection by means of welding.
  • the weld seam 14 should be arranged at least outside the separating cut 8.
  • 8 to 11 show an embodiment in which flat tubes 2 provided with a longitudinal bead 13 on both longitudinal sides 6 are used.
  • the longitudinal beads 13 lie one on top of the other and because they are soldered to one another, two flow channels 16 are formed in the flat tube 2.
  • the longitudinal beads 13 could be disruptive in the connecting surfaces 10 , that is to say there could be leaks here. It has therefore been provided in this exemplary embodiment to remove the longitudinal beads 13 in the region of the connecting surfaces 10 by pressing them flat.
  • the material required for the longitudinal beads 13 was pressed outwards and leads to an enlargement of the narrow sides 11 within the area of the connecting surfaces 10, which is shown in FIG. 8 but in particular in FIG. 10.
  • 12 is a partial side view of the fins 3 - tube 2 - block with bent ends 4 of the flat tubes 2. There the detail W has been drawn in, which is shown in FIGS. 13 and 14 in two different versions. In FIG.
  • the separating cut 8 has an approximately circular hole 21 at its beginning or end. Something like this has proven to be advantageous if the bend 9 must be relatively large because the tearing of the narrow sides 11 of the flat tubes 2 can be counteracted.
  • the holes 21 can e.g. B. in the manufacture of the separating cuts 8 by means of a laser beam or water jet, by piercing the beam there and then leading to the end 4 of the flat tube 2 . In most cases, however, such end crater-like holes 21 are not required and have not been provided according to FIG. 14. 15 and 16 show a further variant in which only the parts 2b of the ends 4 of the flat tubes 2 have been bent. Parts 2a remain straight. In the same way, 6 connecting surfaces 10 are formed with the adjacent longitudinal sides.
  • FIG. 17 shows a section with three flat tubes 2, in which the separating cut 8 has been made, whereby two parts 2a; 2b arise.
  • the depth of the separating cut 8 determines the size of the cut section 12 .
  • the separating cut 8 lies exactly between the two long sides 6.
  • Fig. 18 shows an additional measure, which consists in that between the adjacent longitudinal sides 6 of two adjacent flat tubes 2, or their parts 2a; 2b, one or more pressure joining points 22 have been arranged.
  • Such pressure joining points 22 are known to be attached using suitable forming tools. In the present case, the pressure joining points 22 can take place, for example, together with the attachment of the bends 9 if the bends 9 are to be attached after the ribs 3- pipe 2- block have been joined together.
  • the heat exchanger in FIGS. 19 to 28 is an air-cooled intercooler for motor vehicles, which consists of flat tubes 2 and corrugated fins 3 arranged between them.
  • the flat tubes 2 are welded, extruded or drawn.
  • the partial view in FIG. 19 shows only one collecting box 5.
  • the other collecting box 5 is arranged identically at the opposite ends 4 of the flat tubes 2 . All parts are made of aluminum and are coated with solder as required.
  • the collecting boxes 5 are of the simplest geometrical shape, so that their production is possible very inexpensively using known methods of forming technology.
  • Each collecting box 5 has two connecting edges 7, with which it engages over the narrow sides 11 of the flat tubes 2 at the ends 4 in the section which has been separated.
  • the ends 4 of the compartment tubes 2 each have a separating cut 8 .
  • the separating cut 8 runs in the direction of the large diameter of the flat tubes 2, or parallel to the long sides 6. This has the advantage that both narrow sides 11 of the flat tubes 2 are wide enough to make a firm and tight connection with the connecting edges 7 .
  • the ends 4 of the flat tubes have two parts 2a and 2b .
  • the wider parts 2a remain undeformed, while the narrower parts 2b have a bend 9 .
  • the bends 9 are designed so that the long side 6 of the flat tubes 2 of the narrower parts 2b abuts on the long side 6 of the adjacent flat tube 2 , in each case on the long side 6, which belongs to the non-bent, wider part 2a , which the Fig. 19 clearly shows.
  • undeformed side parts 30 were used which at the same time close the front openings of the collecting boxes 5 .
  • these undeformed middle parts 2c have a favorable effect on the soldered connection between the connecting edges 7 of the header boxes 5 and the narrow sides 11 of the flat tubes 2 , because the middle parts 2c are also connected to the connecting edge 7 .
  • the bends 9 are also carried out here so that the long side 6 of the flat tube 2 or the narrower part 2a abuts the long side 6 of the corresponding part 2b of the adjacent flat tube 2 , so that they can be tightly connected by means of soldering. This is also shown in particular by FIGS. 19, 22 and 23. Shortly below the separating cut 8 in the flat tube ends 4 , the ends 4 of the flat tubes 2 have not yet been separated.
  • FIG. 19 further shows that in this exemplary embodiment continuous, deformed side panels 30 were used. Such side parts 30 also have the next embodiment that is shown in FIGS. 26, 27 and 28.
  • the narrow sides 11 of the flat tubes 2 are first provided with a cutout, as is shown in FIG. 27.
  • the cutout takes up about 50% of the width B of the narrow side 11 of the flat tubes 2 , so that sufficiently wide edges remain on the parts 2a and 2b , which allow a secure connection at the connecting edges 7 .

Abstract

The refrigerator (1) has a block with ribs arranged between flat pipes (2), where the shaped ends (4) of the flat pipes open into opposite collecting (5) or guiding tanks. The longitudinal sides (6) of the shaped ends are connected underneath each other. The ends of the flat pips are welded to the connection edges (7) of the collection tanks. The ends of welded or extruded flat pipes are divided into two by a separation section. At least one part of each flat pipe has a transverse bend, which bends towards a connection face between the longitudinal side of the flat pipe and the longitudinal side of the divided part of the next flat pipe. The collection tank and its connection edges extend over the bent part and as far as the separated section and are connected to the narrow sides of the flat pipes. An Independent claim is included for a method to manufacture the refrigerator or heat exchanger.

Description

Die Erfindung betrifft einen Wärmetauscher für Kraftfahrzeuge mit einem Rippen - Rohr - Block, bestehend aus Flachrohren mit dazwischen angeordneten Rippen, wobei die umgeformten Enden der Flachrohre in gegenüberliegenden Sammel - oder Umlenkkästen münden und mit den Längsseiten der umgeformten Enden untereinander verbunden sind, wobei die Enden der Flachrohre mit den Verbindungsrändern der Sammel - oder Umlenkkästen in Kontakt und mittels Löten verbunden sind.
Ferner betrifft die Erfindung ein Verfahren zur Herstellung solcher Wärmetauscher, bei dem der Rippen - Rohr - Block mit den Sammel - oder Umlenkkästen gleichzeitig verlötet werden.
In jüngerer Zeit häufen sich die Vorschläge über Wärmetauscher bzw. Kühler, die insgesamt aus Aluminium herstellbar sind, weil die Automobilindustrie sich durch staatliche Vorschriften gezwungen sieht, die Recyclefähigkeit von PKW' s deutlich zu verbessern.
An und für sich sind solche Kühler schon seit langem Stand der Technik, wie beispielsweise die DE - PS 1 551 448 aus 1967 oder das deutsche Gebrauchsmuster Nr. 1 519 204 aus 1940 zeigen. Davon unterscheidet sich die neuere deutsche Anmeldung Nr. 195 43 986 A1 nur unwesentlich.
Die genannten Veröffentlichungen beinhalten Wärmetauscher, die häufig als "rohrbodenlose" Wärmetauscher bezeichnet werden, weil sie im Unterschied zu den weitverbreiteten Wärmetauschern mit Rohrböden, bei denen die Enden der Flachrohre in Öffnungen der Rohrböden stecken, deren Ränder mit den Sammelkästen verbunden sind, aufgeweitete Rohrenden besitzen, die direkt mit den Sammelkästen und miteinander verbunden sind und somit keine Rohrböden erfordern.
Nachteilig an dem genannten Stand der Technik ist der beträchtliche Umformgrad, dem die Rohrenden unterzogen werden, weshalb qualitativ hochwertige Werkstoffe notwendig sind. Die Flachrohre weisen rechteckig umgeformte Enden auf, wobei in der Regel der große Durchmesser der Rechtecke wesentlich kleiner ist, als der große Durchmesser der Flachrohre. Diese Einschnürung führt zu strömungstechnischen Nachteilen. Ferner gibt es Probleme, die Sammelkästen mit den rechteckigen Enden mittels Löten dicht zu bekommen. Das trifft insbesondere auf die Eckbereiche der aneinander liegenden Flachrohrenden zu.
Die vor kurzem von der Anmelderin eingereichte deutsche Anmeldung Nr. 100 16 113.8 hat die angeführten Nachteile bereits abgeschwächt oder ganz aufgehoben. Mit der vorliegenden Patentanmeldung werden alternative Lösungsvorschläge angestrebt, die die Möglichkeit bieten, geschweißte oder gezogene Flachrohre einzusetzen und die im übrigen die erwähnten Nachteile ebenfalls beseitigen sollen.The invention relates to a heat exchanger for motor vehicles with a finned tube block consisting of flat tubes with fins arranged therebetween, the shaped ends of the flat tubes opening into opposite collecting or deflection boxes and being connected to one another with the long sides of the shaped ends, the ends being connected the flat tubes are in contact with the connecting edges of the collecting or deflection boxes and are connected by means of soldering.
The invention further relates to a method for producing such heat exchangers, in which the finned tube block is soldered to the header or deflection boxes at the same time.
Recently, there have been increasing proposals for heat exchangers or coolers, which can be made entirely of aluminum, because the automotive industry is forced by state regulations to significantly improve the recyclability of cars.
In and of themselves, such coolers have long been state of the art, as shown, for example, by DE-PS 1 551 448 from 1967 or German utility model No. 1 519 204 from 1940. The more recent German application No. 195 43 986 A1 differs only slightly from this.
The publications mentioned contain heat exchangers, which are often referred to as "tube plate-less" heat exchangers because, in contrast to the widespread heat exchangers with tube plates, in which the ends of the flat tubes are inserted into openings in the tube plates, the edges of which are connected to the header boxes, they have flared tube ends that are directly connected to the header boxes and to each other and therefore do not require tube sheets.
A disadvantage of the prior art mentioned is the considerable degree of deformation to which the pipe ends are subjected, which is why high-quality materials are necessary. The flat tubes have rectangularly shaped ends, the large diameter of the rectangles generally being much smaller than the large diameter of the flat tubes. This constriction leads to fluidic disadvantages. Furthermore, there are problems in sealing the collection boxes with the rectangular ends by means of soldering. This applies in particular to the corner areas of the flat tube ends lying against one another.
The German application No. 100 16 113.8 recently filed by the applicant has already alleviated or eliminated the disadvantages mentioned. The present patent application seeks alternative solutions which offer the possibility of using welded or drawn flat tubes and which, moreover, are also intended to eliminate the disadvantages mentioned.

Bei dem erfindungsgemäßen Wärmetauscher ist vorgesehen, daß die Enden geschweißter oder extrudierter oder gezogener Flachrohre einen Trennschnitt aufweisen, der die Enden der Flachrohre in zwei Teile aufteilt, daß mindestens eines der Teile eines jeden Flachrohres quer zur Längsrichtung eine Abbiegung aufweist, die zu einer Verbindungsfläche zwischen der Längsseite des Flachrohres und der Längsseite des Teils des benachbarten Flachrohres führt und daß die Sammel - oder Umlenkkästen mit ihren Verbindungsrändern bis über die Abbiegung und den aufgetrennten Abschnitt hinweg reichen und mit den Schmalseiten der Flachrohre verbunden sind.
Durch diese Ausbildung führt der erfindungsgemäße Wärmetauscher zu folgenden Vorteilen. Weil am Ende der Flachrohre lediglich relativ geringe Abbiegungen vorhanden sind, muß kein hochwertiger Werkstoff eingesetzt werden. Die Materialbelastung ist äußerst gering. Es gibt auch keine Einschnürung an den Enden der Flachrohre, so daß mit wesentlich geringerem Druckverlust zu rechnen ist, als beim Stand der Technik. Der Strömungsquerschnitt an den Enden wurde sogar erweitert, obwohl keine wesentliche Materialdehnung vorhanden ist. Es können deutlich geringere Wanddicken der Flachrohre zum Einsatz kommen, weil eine sehr geringe Umformung im Endbereich der Flachrohre vorhanden ist. Auf das Expandieren der Rohrenden wurde komplett verzichtet.
Gemäß Anspruch 2 ist vorgesehen, daß die Flachrohre geschweißt sind eine oder mehrere Längssicken aufweisen, die mehrere Strömungskanäle im Flachrohr ausbilden wobei die Längssicken innerhalb des aufgetrennten Abschnitts umformtechnisch beseitigt sind.
Geschweißte Flachrohre sind kostengünstiger als gezogene Flachrohre. Das Material der Längssicken innerhalb des aufgetrennten Abschnittes wird nach außen, in die Längsränder gedrückt, wodurch die Verbindungsflächen, die sich an den Enden der benachbarten Flachrohre einstellen, glatt sind und wenig Probleme bezüglich einer dichten löttechnischen Verbindung bereiten. Dieser Anspruch ist lediglich fakultativ vorgesehen.
Gemäß Anspruch 4 ist bei geschweißten Flachrohren die Längsnaht außerhalb des Trennschnittes, vorzugsweise auf einer Längsseite des Flachrohres, in der Nähe einer Schmalseite des Flachrohres angeordnet. Das vereinfacht die Anbringung des Trennschnittes.
Gemäß Anspruch 5 sind die Flachrohre gezogene oder extrudierte Rohre und haben eine oder mehrere Längswände zur Unterteilung in mehrere Strömungskanäle. Das ist besonders bei Kühlflüssigkeitskühlern vorteilhaft.
Nach Anspruch 6 kann jedoch auf Längssicken oder Längswände verzichtet werden. Für diesen Fall ist ein Inneneinsatz vorgesehen. Das ist besonders für Ladeluftkühler vorteilhaft.
Anspruch 7 sieht vor, daß beide Enden bzw. beide Teile eines jeden Flachrohres jeweils zwei quer zur Längsrichtung des Flachrohres angeordnete Abbiegungen aufweisen, wobei die eine Abbiegung etwa dort angeordnet ist, wo die Verbindungsfläche der Längsseite des einen Flachrohres mit der Längsseite des benachbarten Flachrohres beginnt und die andere Abbiegung etwa dort vorgesehen ist, wo der aufgetrennte Abschnitt der Flachrohre beginnt bzw. endet. Der Trennschnitt ist vorzugsweise parallel zu den Längsseiten eines jeden Flachrohres angeordnet, so daß beide Stirnseiten des Flachrohres aufgetrennt sind. Dadurch ist eine vorteilhafte Ausführung der Erfindung gekennzeichnet worden. Im Gegensatz zum Anspruch 7 umfaßt Anspruch 1 auch Ausführungen mit nur einer Abbiegung, nämlich die am Ende des aufgetrennten Abschnittes, wo das Flachrohr beginnt.
Dort wo die Verbindungsfläche beginnt kann auch ein allmählicher Übergang in die Verbindungsfläche vorhanden sein.
Anspruch 8 sieht alternativ dazu vor, daß nur eines der erwähnten Teile eine Abbiegung aufweist und das andere Teil glatt bleibt.
Die Längsseiten der Flachrohre sind auf der Seite, auf der sie mit der Längsseite des benachbarten Flachrohres eine Verbindungsfläche bilden im wesentlichen glatt.
Es ist vorteilhaft, wenn zwischen den Längsseiten bzw. in der Verbindungsfläche ein oder mehrere Druckfügepunkte angeordnet werden.
Das erfindungsgemäße Verfahren sieht vor, daß die Enden der Flachrohre aufgetrennt und mindestens eines der nach dem Auftrennen entstandenen zwei Teile eines jeden Flachrohres quer zur Längsrichtung der Flachrohre abgebogen wird, um mit der Längsseite des benachbarten Flachrohres eine Verbindungsfläche zu bilden, daß die Sammel - oder Umlenkkästen mit ihren Verbindungsrändern über den Rippen - Flachrohr - Block geschoben und die Verbindungsränder mit den Schmalseiten der aufgetrennten Teile der Flachrohre verbunden werden.
Das Auftrennen kann mit einem Laserstrahl oder einem Flüssigkeitsstrahl oder mittels üblicher Trennmittel erfolgen und geschieht vorzugsweise parallel zu den Längsseiten der Flachrohre, genau in der Mitte zwischen beiden Längsseiten. Vorzugsweise ist vorgesehen, daß beide Teile der Flachrohre einfach oder zweifach quer zur Längsrichtung der Flachrohre abgebogen werden.
Bei dem Wärmetauscher der angegebenen Art ist gemäß Anspruch 11 vorgesehen, daß der mindestens eine Trennschnitt außerhalb der Mittellinie an mindestens einer der zwei Schmalseiten angeordnet ist. Vorzugsweise soll der Trennschnitt parallel zu beiden Längsseiten des Flachrohres, also an beiden Schmalseiten außerhalb ihrer Mittellinie, angeordnet sein. Die Anbringung mindestens eines außermittigen Trennschnittes ist für Wärmetauscher mit Flachrohren mit etwas breiteren Schmalseiten sehr vorteilhaft, weil der schmalere, abgetrennte Teil der Enden der Flachrohre leichter umgeformt, bzw. abgebogen werden kann.
Gemäß Anspruch 12 wurde daran gedacht, das schmalere Teil der Enden der Flachrohre umzuformen und das breitere Teil unverformt zu belassen, so daß die zum schmaleren Teil gehörende Längsseite des einen Flachrohres an der zum breiteren, unverformten Teil gehörenden Längsseite des benachbarten Flachrohres anliegt.
Anspruch 13 sieht demgegenüber vor, zwei, vorzugsweise parallele, außermittige Trennschnitte in den Schmalseiten der Enden der Flachrohre anzuordnen, wobei das durch die Trennschnitte entstehende Mittelteil unverformt bleibt und beide seitlichen Teile abgebogen sind, so daß ihre Längsseiten an den Längsseiten benachbarter Flachrohrenden anliegen.In the heat exchanger according to the invention it is provided that the ends of welded or extruded or drawn flat tubes have a separating cut which divides the ends of the flat tubes into two parts, that at least one of the parts of each flat tube has a bend transversely to the longitudinal direction which leads to a connecting surface between The long side of the flat tube and the long side of the part of the adjacent flat tube leads and that the collecting or deflection boxes with their connecting edges extend over the bend and the cut section and are connected to the narrow sides of the flat tubes.
As a result of this design, the heat exchanger according to the invention has the following advantages. Because there are only relatively small bends at the end of the flat tubes, no high-quality material has to be used. The material load is extremely low. There is also no constriction at the ends of the flat tubes, so that a much lower pressure loss can be expected than in the prior art. The flow cross-section at the ends was even expanded, although there is no significant material expansion. Significantly smaller wall thicknesses of the flat tubes can be used because there is very little deformation in the end area of the flat tubes. There was no need to expand the pipe ends.
According to claim 2 it is provided that the flat tubes are welded have one or more longitudinal beads, which form a plurality of flow channels in the flat tube, wherein the longitudinal beads within the separated section are eliminated by forming.
Welded flat tubes are cheaper than drawn flat tubes. The material of the longitudinal beads within the cut-off section is pressed outwards into the longitudinal edges, as a result of which the connecting surfaces which form at the ends of the adjacent flat tubes are smooth and pose little problem with regard to a tight soldered connection. This claim is only optional.
In the case of welded flat tubes, the longitudinal seam is arranged outside the separating cut, preferably on a long side of the flat tube, in the vicinity of a narrow side of the flat tube. This simplifies the application of the separating cut.
According to claim 5, the flat tubes are drawn or extruded tubes and have one or more longitudinal walls for subdivision into several flow channels. This is particularly advantageous with coolant coolers.
According to claim 6, however, longitudinal beads or longitudinal walls can be dispensed with. An indoor insert is provided for this case. This is particularly advantageous for intercoolers.
Claim 7 provides that both ends or both parts of each flat tube each have two bends arranged transversely to the longitudinal direction of the flat tube, the one bend being arranged approximately where the connecting surface of the long side of the one flat tube begins with the long side of the adjacent flat tube and the other bend is provided approximately where the cut section of the flat tubes begins or ends. The separating cut is preferably arranged parallel to the long sides of each flat tube, so that both end faces of the flat tube are separated. This has characterized an advantageous embodiment of the invention. In contrast to claim 7, claim 1 also includes designs with only one bend, namely that at the end of the cut section where the flat tube begins.
Where the connection surface begins, there may also be a gradual transition into the connection surface.
Claim 8 alternatively provides that only one of the parts mentioned has a bend and the other part remains smooth.
The long sides of the flat tubes are essentially smooth on the side on which they form a connecting surface with the long side of the adjacent flat tube.
It is advantageous if one or more pressure joining points are arranged between the long sides or in the connecting surface.
The method according to the invention provides that the ends of the flat tubes are separated and at least one of the two parts of each flat tube formed after the separation is bent transversely to the longitudinal direction of the flat tubes in order to form a connecting surface with the longitudinal side of the adjacent flat tube that the collecting or Deflection boxes with their connecting edges are pushed over the ribbed flat tube block and the connecting edges are connected to the narrow sides of the separated parts of the flat tubes.
The separation can be carried out with a laser beam or a liquid jet or by means of conventional separating means and is preferably carried out parallel to the long sides of the flat tubes, exactly in the middle between the two long sides. It is preferably provided that both parts of the flat tubes are bent once or twice transversely to the longitudinal direction of the flat tubes.
In the heat exchanger of the type specified, it is provided according to claim 11 that the at least one separating cut is arranged outside the center line on at least one of the two narrow sides. The separating cut should preferably be arranged parallel to both long sides of the flat tube, that is to say on both narrow sides outside their center line. The attachment of at least one off-center separating cut is very advantageous for heat exchangers with flat tubes with somewhat wider narrow sides, because the narrower, separated part of the ends of the flat tubes can be shaped or bent more easily.
According to claim 12, it was thought to reshape the narrower part of the ends of the flat tubes and to leave the wider part undeformed, so that the long side of the one flat tube belonging to the narrower part rests on the long side of the adjacent flat tube belonging to the wider, undeformed part.
Claim 13, on the other hand, provides for two, preferably parallel, eccentric separating cuts to be arranged in the narrow sides of the ends of the flat tubes, the central part resulting from the separating cuts remaining undeformed and both lateral parts being bent so that their long sides lie against the long sides of adjacent flat tube ends.

Als weitere alternative Lösung ist gemäß Anspruch 14 vorgesehen, daß der Trennschnitt mittels eines symmetrischen oder asymmetrischen Ausschnitts der Schmalseiten gebildet ist. Das hat den Vorteil, daß beidseitig des Ausschnitts relativ schmale Teile vorhanden sind, die sich ebenfalls vorteilhaft abbiegen lassen.As a further alternative solution is provided according to claim 14 that the separating cut by means of a symmetrical or asymmetrical cutout of the narrow sides is formed. This has the advantage that relative to both sides of the cutout narrow parts are available, which can also be turned advantageously.

Der Ausschnitt wird vorzugsweise mit einem Werkzeug ausgeführt, mit dem der Ausschnitt in beiden gegenüberliegenden Schmalseiten in einem Arbeitsgang erfolgen kann. Das nachfolgende Abbiegen der schmalen Teile kann gleichzeitig mit der Anbringung des Ausschnitts, aber auch später, nach dem Zusammenfügen des Rippen - Flachrohr - Blocks, durchgeführt werden.The cutout is preferably carried out with a tool with which the Cut out in both opposite narrow sides in one operation can. The subsequent turning of the narrow parts can be done simultaneously the attachment of the cutout, but also later, after the assembly of the Ribs - flat tube blocks.

Weitere Merkmale sind in den Patentansprüchen enthalten. Außerdem gehen Merkmale und Wirkungen aus der nachfolgenden Beschreibung von Ausführungsbeispielen hervor. Es wird Bezug auf die beiliegenden Zeichnungen genommen. Die einzelnen Figuren zeigen Folgendes:

Fig.1
Perspektivansicht auf einen Teil des erfindungsgemäßen Kühlers mit Sammelkasten;
Fig. 2
Perspektivansicht aus einem anderen Blickwinkel ohne Sammelkasten;
Fig. 3
Teil einer Seitenansicht;
Fig. 4
Schnitt A - A aus Fig. 3;
Fig. 5
Schnitt B - B aus Fig. 3;
Fig. 6
Einzelheit "V" von Fig. 4;
Fig. 7
Einzelheit "U" aus Fig. 4;
Fig. 8
Perspektivansicht einer zweiten Ausführung;
Fig. 9
Schnitt A-A in Fig. 8;
Fig. 10
vergrößerter Ausschnitt aus Fig. 8;
Fig. 11
Einzelheit "Z" in Fig. 9 ;
Fig. 12 bis 14
Einzelheiten der Auftrennung der Enden der Flachrohre;
Fig. 15
Schnitt durch eine dritte Ausführungsform;
Fig. 16
Seitenansicht von Fig. 15;
Fig. 17
Flachrohr mit aufgetrenntem Abschnitt;
Fig. 18
Variante mit Verbindung der Längsseiten der Flachrohre;
Fig. 19
Schnitt durch eine vierte Ausführungsform;
Fig. 20 u. 21
Rohrende der vierten Ausführungsform;
Fig. 22
Perspektivansicht der fünften Ausführungsform;
Fig. 23
Seitenansicht der fünften Ausführungsform;
Fig. 24 u. 25
Rohrende der fünften Ausführungsform;
Fig. 26
Längsschnitt der sechsten Ausführungsform;
Fig. 27 u. 28
Rohrende der sechsten Ausführungsform;
Further features are contained in the claims. Features and effects also emerge from the following description of exemplary embodiments. Reference is made to the accompanying drawings. The individual figures show the following:
Fig. 1
Perspective view of a part of the cooler according to the invention with collecting box;
Fig. 2
Perspective view from a different point of view without collecting box;
Fig. 3
Part of a side view;
Fig. 4
Section A - A of Fig. 3;
Fig. 5
Section BB from FIG. 3;
Fig. 6
Detail "V" of Fig. 4;
Fig. 7
Detail "U" from Fig. 4;
Fig. 8
Perspective view of a second embodiment;
Fig. 9
Section AA in Fig. 8;
Fig. 10
enlarged section of Fig. 8;
Fig. 11
Detail "Z" in Fig. 9;
12 to 14
Details of the separation of the ends of the flat tubes;
Fig. 15
Section through a third embodiment;
Fig. 16
Side view of Fig. 15;
Fig. 17
Flat tube with cut section;
Fig. 18
Variant with connection of the long sides of the flat tubes;
Fig. 19
Section through a fourth embodiment;
Fig. 20 u. 21
Pipe end of the fourth embodiment;
Fig. 22
Perspective view of the fifth embodiment;
Fig. 23
Side view of the fifth embodiment;
24 u. 25th
Pipe end of the fifth embodiment;
Fig. 26
Longitudinal section of the sixth embodiment;
Fig. 27 u. 28
Pipe end of the sixth embodiment;

Die Kühler 1 bestehen aus Flachrohren 2 und dazwischen angeordneten Wellrippen 3. Die Wellrippen 3 wurden in den Figuren 1 und 2 nicht gezeichnet, sind aber beispielsweise in Fig. 3 zu erkennen. Die Teilansicht in der Fig. 1 zeigt lediglich einen Sammelkasten 5. Es versteht sich, daß der andere Sammelkasten 5 an den gegenüberliegenden Enden 4 der Flachrohre 2 identisch angeordnet ist. Sämtliche Teile bestehen aus Aluminium und sind nach Bedarf mit Lot beschichtet. Die Sammelkästen 5 sind von einfachster geometrischer Form, so daß ihre Herstellung sehr kostengünstig mit bekannten Verfahren der Umformtechnik möglich ist. Jeder Sammelkasten 5 hat zwei Verbindungsränder 7 mit denen er die Schmalseiten 11 der Flachrohre 2 an den Enden 4 im aufgetrennten Abschnitt 12 (Fig. 2) übergreift. Die Enden 4 der Fachrohre 2 weisen jeweils einen Trennschnitt 8 auf. Der Trennschnitt 8 verläuft in der Richtung des großen Durchmessers D der Flachrohre 2, bzw. parallel zu den Längsseiten 6. Das hat den Vorteil, daß beide Schmalseiten 11 der Flachrohre 2 breit genug sind, um mit den Verbindungsrändern 7 eine feste und dicht Verbindung einzugehen. Nachdem der Trennschnitt 8 an den Enden 4 der Flachrohre 2 angebracht wurde, weisen die Enden 4 der Flachrohre zwei Teile 2a und 2b auf. Die Teile 2a und 2b werden quer zur Längsrichtung der Flachrohre 2 abgebogen, sie weisen also gemäß den Fig. 1, 2, 3, 8, 10 u. a. zwei Abbiegungen 9 auf. Wie die Figuren zeigen, sind diese Abbiegungen 9 nicht unbedingt scharfe Abkantungen. Unter einer Abbiegung 9 ist zumindest eine Richtungsänderung zu verstehen. Im Einzelfall hängt die konkrete Ausbildung der Abbiegungen 9 von dem Abstand der Flachrohre 2 bzw. der Höhe der Wellrippen 3 im Rippen - Rohr - Block ab. Die Abbiegungen 9 führen dazu, daß die Längsseite 6 des Teiles 2a eines Flachrohres 2 mit der Längsseite 6 des Teiles 2b des benachbarten Flachrohres 2 jeweils eine Verbindungsfläche 10 ergeben. Das Auftrennen der Enden 4 der Flachrohre 2 erfolgt nach dem Ablängen der Flachrohre 2. Dann können die abgelängten Flachrohre 2 mit den Wellrippen 3 zum Rippen - Rohr - Block zusammengefügt werden. Anschließend können dann die Teile 2a und 2b, wie beschrieben, abgebogen werden. An den so vorbereiteten Rippen - Rohr - Block werden die Sammelkästen 5 angebracht und zwar derart, daß ihre Verbindungsränder 7 auf beiden Seiten über den aufgetrennten Abschnitt 12 der Enden 4 der Flachrohre 2 geschoben werden. Dabei schließen die Verbindungsränder 7 auch die Abbiegungen 9 ein, was insbesondere aus der Fig. 3 hervorgeht. Die Sammelkästen 5 reichen mit ihren Verbindungsrändern 7 bis kurz unterhalb des aufgetrennten Abschnitts 12. Es ist aber auch möglich, die Abbiegungen 9 direkt im Anschluß an das Auftrennen der Enden 4 der Flachrohre 2 anzubringen und erst danach den Rippen - Rohr - Block zusammenzufügen.
Die Teilansicht des Kühlers 1 in der Fig. 3 zeigt weiter, daß in den bisher geschilderten Ausführungen beide Teile 2a und 2b abgebogen wurden und durch das Anliegen der Längsseiten 6 benachbarter Flachrohre 2 Verbindungsflächen 10 bilden. Die Stirnseiten der Sammelkästen 5 sind mit einem Deckel 20 verschlossen. Die Fig. 4 stellt den Schnitt A - A durch einen Teil des Kühlers 1 dar. Der Schnitt verläuft kurz unterhalb des aufgetrennten Abschnitts 12 und zeigt deshalb die Flachrohre 2, die dort nicht aufgetrennt sind. Die Flachrohre 2 haben Längsseiten 6 und Schmalseiten 11, wobei die Schmalseiten 11 mit dem Verbindungsrand 7 der Sammelkästen 5 in diesem Bereich schon verbunden sind. Die Fig. 5 stellt einen Schnitt durch die Verbindungsflächen 10 in Fig. 3 dar. Daraus geht hervor, was oben bereits angesprochen wurde, daß die Längsseiten 6 benachbarter Flachrohre 2 die Verbindungsflächen 10 bilden und zwar durch ein Teil 2a des einen Flachrohres 2 und ein Teil 2b des benachbarten Flachrohres 2. Beide Teile 2a und 2b weisen Abbiegungen 9 auf. Die Schmalseiten 11 der Flachrohre 2, bzw. der beiden Teile 2a und 2b, sind auch hier dicht und fest mit den Verbindungsrändern 7 verbunden. (siehe auch Fig. 6) Insbesondere geht aus Fig. 5 hervor, daß keinerlei Einschnürung des Strömungskanals 16 vorhanden ist, so daß es keinen dadurch verursachten Druckverlust geben kann.
Die Fig. 7 zeigt ein Ausführungsbeispiel, bei dem mit einer Längsnaht 14 geschweißte Flachrohre 2 verwendet worden sind. Die Längsnaht 14 befindet sich in einer Längswand 6 des Flachrohres 2, allerdings in relativer Nähe zu einer Schmalseite 11, weil dort eine höhere Steifigkeit im Rohr gegeben ist, die die Verbindung mittels Schweißen erleichtert. Die Schweißnaht 14 sollte zumindest außerhalb des Trennschnittes 8 angeordnet sein.
In den Fig. 8 bis 11 ist ein Ausführungsbeispiel abgebildet, bei dem mit je einer Längssicke 13 auf beiden Längsseiten 6 versehene Flachrohre 2 verwendet werden. Die Längssicken 13 liegen aufeinander und weil sie miteinander verlötet sind, entstehen zwei Strömungskanäle 16 in dem Flachrohr 2. Die Längssicken 13 könnten in den Verbindungsflächen 10 störend sein, das heißt, es könnten hier Undichtigkeiten entstehen. Deshalb hat man in diesem Ausführungsbeispiel vorgesehen, im Bereich der Verbindungsflächen 10 die Längssicken 13 zu entfernen, indem dieselben glattgedrückt wurden. Das für die Längssicken 13 erforderliche Material wurde nach außen gepreßt und führt zu einer Vergrößerung der Schmalseiten 11 innerhalb des Bereiches der Verbindungsflächen 10, was die Fig. 8 aber insbesondere die Fig. 10 zeigt.
Die Fig. 12 ist eine Teil - Seitenansicht auf den Rippen 3 - Rohr 2 - Block mit abgebogenen Enden 4 der Flachrohre 2. Dort ist die Einzelheit W eingezeichnet worden, die in den Fig. 13 und 14 in zwei verschiedenen Ausführungen gezeigt ist. In Fig. 13 weist der Trennschnitt 8 an seinem Anfang bzw. Ende ein etwa kreisrundes Loch 21 auf. So etwas hat sich als vorteilhaft erwiesen, wenn die Abbiegung 9 relativ groß sein muß, weil dem Einreißen der Schmalseiten 11 der Flachrohre 2 entgegengewirkt werden kann. Die Löcher 21 können z. B. bei der Herstellung der Trennschnitte 8 mittels Laserstrahl oder Wasserstrahl hergestellt werden, indem der Strahl dort durchsticht und dann zum Ende 4 des Flachrohres 2 geführt wird. In den meisten Fällen sind solche endkraterartigen Löcher 21 jedoch nicht erforderlich und gemäß Fig. 14 nicht vorgesehen worden.
Die Fig. 15 und 16 zeigen eine weitereVariante, bei der lediglich die Teile 2b der Enden 4 der Flachrohre 2 abgebogen wurden. Die Teile 2a bleiben gerade. In gleicher Weise werden mit den anliegenden Längsseiten 6 Verbindungsflächen 10 ausgebildet.
Die Fig. 17 zeigt einen Ausschnitt mit drei Flachrohren 2, bei denen der Trennschnitt 8 angebracht wurde, wodurch zwei Teile 2a; 2b entstehen. Die Tiefe des Trennschnitts 8 legt die Größe des aufgetrennten Abschnitts 12 fest. Der Trennschnitt 8 liegt genau zwischen den beiden Längsseiten 6.
Die Fig. 18 zeigt eine Zusatzmaßnahme, die darin besteht, daß zwischen den anliegenden Längsseiten 6 zweier benachbarter Flachrohre 2, bzw. deren Teile 2a; 2b, ein oder mehrere Druckfügepunkte 22 angeordnet wurden. Solche Druckfügepunkte 22 werden bekanntermaßen mit geeigneten Umformwerkzeugen angebracht. Im vorliegenden Fall können die Druckfügepunkte 22 beispielsweise gemeinsam mit dem Anbringen der Abbiegungen 9 erfolgen, falls die Abbiegungen 9 nach dem Zusammenfügen des Rippen 3 - Rohr 2 - Blocks angebracht werden sollen. Werden die Abbiegungen 9 bereits nach dem Ablängen der Flachrohre, d. h., vor dem Zusammenfügen des Rippen 3 - Rohr 2 - Blocks angebracht, ist für die Herstellung der Druckfügepunkte 22 ein zusätzlicher Arbeitsschritt am zusammengefügten Rippen 3 - Rohr 2 - Block erforderlich. Die Druckfügepunkte 22 bewirken, daß der Rippen 3 - Rohr 2 - Block vor dem Löten fest zusammengehalten wird, so daß Hilfsvorrichtungen entfallen oder deren Aufwand zumindest reduziert werden kann.
Der Wärmetauscher in den Fig. 19 bis 28 ist ein luftgekühlter Ladeluftkühler für Kraftfahrzeuge, der aus Flachrohren 2 und dazwischen angeordneten Wellrippen 3 besteht. Die Flachrohre 2 sind geschweißter, extrudierter oder gezogener Ausführung. Die Teilansicht in der Fig. 19 zeigt lediglich einen Sammelkasten 5. Es versteht sich, daß der andere Sammelkasten 5 an den gegenüberliegenden Enden 4 der Flachrohre 2 identisch angeordnet ist. Sämtliche Teile bestehen aus Aluminium und sind nach Bedarf mit Lot beschichtet. Die Sammelkästen 5 sind von einfachster geometrischer Form, so daß ihre Herstellung sehr kostengünstig mit bekannten Verfahren der Umformtechnik möglich ist. Jeder Sammelkasten 5 hat zwei Verbindungsränder 7, mit denen er die Schmalseiten 11 der Flachrohre 2 an den Enden 4 im aufgetrennten Abschnitt übergreift. Die Enden 4 der Fachrohre 2 weisen jeweils einen Trennschnitt 8 auf. Der Trennschnitt 8 verläuft in der Richtung des großen Durchmessers der Flachrohre 2, bzw. parallel zu den Längsseiten 6. Das hat den Vorteil, daß beide Schmalseiten 11 der Flachrohre 2 breit genug sind, um mit den Verbindungsrändern 7 eine feste und dichte Verbindung einzugehen. Nach dem der Trennschnitt 8 an den Enden 4 der Flachrohre 2 - und zwar außerhalb der Mitte 31 ihrer Schmalseiten 11 - angebracht wurde, weisen die Enden 4 der Flachrohre zwei Teile 2a und 2b auf. Die breiteren Teile 2a bleiben unverformt, während die schmaleren Teile 2b eine Abbiegung 9 aufweisen. Die Abbiegungen 9 sind so ausgeführt, daß die Längsseite 6 der Flachrohre 2 der schmaleren Teile 2b an der Längsseite 6 des benachbarten Flachrohres 2 anliegt, und zwar jeweils an der Längsseite 6, die zum nicht abgebogenen, breiteren Teil 2a gehört, was die Fig. 19 deutlich zeigt.
Im Ausführungsbeispiel nach Fig. 19 wurden unverformte Seitenteile 30 verwendet, die gleichzeitig die stirnseitigen Öffnungen der Sammelkästen 5 verschließen.
Die nachfolgend zu beschreibenden Fig. 23 bis 25 betreffen ein Ausführungsbeispiel, bei dem die Schmalseiten 11 der Flachrohre 2 deutlich breiter sind, als diejenigen im zuvor beschriebenen Ausführungsbeispiel. Deshalb wurde hier eine Variante gewählt, bei der die Enden 4 der Flachrohre 2 je zwei Trennschnitte 8 an ihren Schmalseiten 11 aufweisen. Dadurch entsteht an allen Enden 4 ein Mittelteil 2c und zwei seitliche Teile 2a, 2b. Wie die Fig. 24 und 25 im Detail zeigen, sind die seitlichen Teile 2a und 2b in diesem Fall von gleicher Größe und Gestalt und sie weisen beide die Abbiegungen 9 auf. Das Mittelteil 2c bleibt unverformt. Insbesondere ist zu erkennen, daß diese unverformten Mittelteile 2c sich günstig auf die Lötverbindung zwischen den Verbindungsrändern 7 der Sammelkästen 5 und den Schmalseiten 11 der Flachrohre 2 auswirken, denn auch die Mittelteile 2c sind mit dem Verbindungsrand 7 verbunden. Die Abbiegungen 9 sind auch hier so ausgeführt, daß die Längsseite 6 des Flachrohrs 2 bzw. des schmaleren Teils 2a an der Längsseite 6 des entsprechenden Teils 2b des benachbarten Flachrohrs 2 anliegt, so daß sie mittels Löten dicht zu verbinden sind. Das zeigen insbesondere ebenfalls die Figuren 19, 22 und 23.
Kurz unterhalb des Trennschnittes 8 in den Flachrohrenden 4 sind die Enden 4 der Flachrohre 2 noch nicht aufgetrennt. Auch dort sind die Schmalseiten 11 der Flachrohre 2 bereits mit den Verbindungsrändern 7 der Sammelkästen 5 verbunden. (Fig. 19, 23) In den Flachrohren 2 befindet sich jeweils ein Inneneinsatz, der für Turbulenz in der Ladeluft und für effizienten Wärmeaustausch sorgt. Auf den Inneneinsatz kommt es hier jedoch nicht besonders an, denn die erwähnte Wirkung kann bekanntlich auch anders erzielt werden, beispielsweise durch Längssicken und / oder Noppen in den Längsseiten 6 der Flachrohre 2. Die Fig. 19 zeigt weiter, daß in diesem Ausführungsbeispiel durchgehende, verformte Seitenteile 30 eingesetzt wurden.
Solche Seitenteile 30 weist auch das nächste Ausführungsbeispiel auf, daß in den Fig. 26, 27 und 28 gezeigt ist. Hierbei werden die Schmalseiten 11 der Flachrohre 2 zunächst mit einem Ausschnitt versehen, wie das in der Fig. 27 gezeigt ist. Der Ausschnitt nimmt etwa 50% der Breite B der Schmalseite 11 der Flachrohre 2 ein, so daß ausreichend breite Ränder an den Teilen 2a und 2b verbleiben, die eine sichere Verbindung an den Verbindungsrändern 7 gestatten.The coolers 1 consist of flat tubes 2 and corrugated fins 3 arranged between them . The corrugated fins 3 were not shown in FIGS. 1 and 2, but can be seen, for example, in FIG. 3. The partial view in FIG. 1 shows only one header box 5. It goes without saying that the other header box 5 is arranged identically at the opposite ends 4 of the flat tubes 2 . All parts are made of aluminum and are coated with solder as required. The collecting boxes 5 are of the simplest geometrical shape, so that their production is possible very inexpensively using known methods of forming technology. Each collecting box 5 has two connecting edges 7 with which it overlaps the narrow sides 11 of the flat tubes 2 at the ends 4 in the section 12 (FIG. 2). The ends 4 of the compartment tubes 2 each have a separating cut 8 . The separating cut 8 runs in the direction of the large diameter D of the flat tubes 2, or parallel to the long sides 6. This has the advantage that both narrow sides 11 of the flat tubes 2 are wide enough to make a firm and tight connection with the connecting edges 7 . After the separating cut 8 has been made at the ends 4 of the flat tubes 2 , the ends 4 of the flat tubes have two parts 2a and 2b . The parts 2a and 2b are bent transversely to the longitudinal direction of the flat tubes 2 , that is to say they have two bends 9 according to FIGS. 1, 2, 3, 8, 10. As the figures show, these bends 9 are not necessarily sharp bends. A bend 9 is understood to mean at least one change in direction. In individual cases, the specific design of the bends 9 depends on the distance between the flat tubes 2 and the height of the corrugated fins 3 in the fin-tube block. The turns 9 cause the longitudinal side 6 of a flat tube 2 with the longitudinal side 6 of the part 2b of the adjacent flat tube 2 are each give a compound surface 10 of the part 2a. The ends 4 of the flat tubes 2 are cut open after the flat tubes 2 have been cut to length. The cut flat tubes 2 can then be joined together with the corrugated fins 3 to form a fin-tube block. The parts 2a and 2b can then be bent as described. The collecting boxes are block 5 is mounted in such a way that their joining edges are pushed 7 on both sides over the separated portion 12 of the ends 4 of the flat tubes 2 - to the thus prepared ribs - tube. The connecting edges 7 also include the bends 9 , which is particularly evident from FIG. 3. The collecting boxes 5 extend with their connecting edges 7 to just below the section 12. It is also possible to make the bends 9 directly after the ends 4 of the flat tubes 2 have been separated and only then to join the finned tube block.
The partial view of the cooler 1 in FIG. 3 further shows that, in the embodiments described so far, both parts 2a and 2b have been bent and 2 connecting surfaces 10 form due to the abutment of the longitudinal sides 6 of adjacent flat tubes. The end faces of the collecting boxes 5 are closed with a cover 20 . 4 shows the section A - A through part of the cooler 1. The section runs just below the cut section 12 and therefore shows the flat tubes 2, which are not cut there. The flat tubes 2 have long sides 6 and narrow sides 11, the narrow sides 11 being already connected to the connecting edge 7 of the header boxes 5 in this area. 5 shows a section through the connecting surfaces 10 in FIG. 3. This shows what has already been mentioned above that the longitudinal sides 6 of adjacent flat tubes 2 form the connecting surfaces 10 , namely through part 2a of a flat tube 2 and one Part 2b of the adjacent flat tube 2. Both parts 2a and 2b have bends 9 . The narrow sides 11 of the flat tubes 2, or of the two parts 2a and 2b, are also tightly and firmly connected to the connecting edges 7 here . (See also FIG. 6) In particular, FIG. 5 shows that there is no constriction of the flow channel 16 , so that there can be no pressure loss caused thereby.
7 shows an embodiment in which flat tubes 2 welded with a longitudinal seam 14 have been used. The longitudinal seam 14 is located in a longitudinal wall 6 of the flat tube 2, but in relative proximity to a narrow side 11, because there is a higher rigidity in the tube, which facilitates the connection by means of welding. The weld seam 14 should be arranged at least outside the separating cut 8.
8 to 11 show an embodiment in which flat tubes 2 provided with a longitudinal bead 13 on both longitudinal sides 6 are used. The longitudinal beads 13 lie one on top of the other and because they are soldered to one another, two flow channels 16 are formed in the flat tube 2. The longitudinal beads 13 could be disruptive in the connecting surfaces 10 , that is to say there could be leaks here. It has therefore been provided in this exemplary embodiment to remove the longitudinal beads 13 in the region of the connecting surfaces 10 by pressing them flat. The material required for the longitudinal beads 13 was pressed outwards and leads to an enlargement of the narrow sides 11 within the area of the connecting surfaces 10, which is shown in FIG. 8 but in particular in FIG. 10.
12 is a partial side view of the fins 3 - tube 2 - block with bent ends 4 of the flat tubes 2. There the detail W has been drawn in, which is shown in FIGS. 13 and 14 in two different versions. In FIG. 13, the separating cut 8 has an approximately circular hole 21 at its beginning or end. Something like this has proven to be advantageous if the bend 9 must be relatively large because the tearing of the narrow sides 11 of the flat tubes 2 can be counteracted. The holes 21 can e.g. B. in the manufacture of the separating cuts 8 by means of a laser beam or water jet, by piercing the beam there and then leading to the end 4 of the flat tube 2 . In most cases, however, such end crater-like holes 21 are not required and have not been provided according to FIG. 14.
15 and 16 show a further variant in which only the parts 2b of the ends 4 of the flat tubes 2 have been bent. Parts 2a remain straight. In the same way, 6 connecting surfaces 10 are formed with the adjacent longitudinal sides.
17 shows a section with three flat tubes 2, in which the separating cut 8 has been made, whereby two parts 2a; 2b arise. The depth of the separating cut 8 determines the size of the cut section 12 . The separating cut 8 lies exactly between the two long sides 6.
Fig. 18 shows an additional measure, which consists in that between the adjacent longitudinal sides 6 of two adjacent flat tubes 2, or their parts 2a; 2b, one or more pressure joining points 22 have been arranged. Such pressure joining points 22 are known to be attached using suitable forming tools. In the present case, the pressure joining points 22 can take place, for example, together with the attachment of the bends 9 if the bends 9 are to be attached after the ribs 3- pipe 2- block have been joined together. If the bends 9 are already made after the flat tubes have been cut to length, ie before the ribs 3- tube 2 block have been joined together, an additional step on the joined ribs 3- tube 2 block is required to produce the pressure joining points 22 . The pressure joining points 22 have the effect that the ribs 3- tube 2- block are held together firmly before soldering, so that auxiliary devices can be dispensed with or their expenditure can at least be reduced.
The heat exchanger in FIGS. 19 to 28 is an air-cooled intercooler for motor vehicles, which consists of flat tubes 2 and corrugated fins 3 arranged between them. The flat tubes 2 are welded, extruded or drawn. The partial view in FIG. 19 shows only one collecting box 5. It goes without saying that the other collecting box 5 is arranged identically at the opposite ends 4 of the flat tubes 2 . All parts are made of aluminum and are coated with solder as required. The collecting boxes 5 are of the simplest geometrical shape, so that their production is possible very inexpensively using known methods of forming technology. Each collecting box 5 has two connecting edges 7, with which it engages over the narrow sides 11 of the flat tubes 2 at the ends 4 in the section which has been separated. The ends 4 of the compartment tubes 2 each have a separating cut 8 . The separating cut 8 runs in the direction of the large diameter of the flat tubes 2, or parallel to the long sides 6. This has the advantage that both narrow sides 11 of the flat tubes 2 are wide enough to make a firm and tight connection with the connecting edges 7 . After the separating cut 8 has been made at the ends 4 of the flat tubes 2 - specifically outside the center 31 of their narrow sides 11 - the ends 4 of the flat tubes have two parts 2a and 2b . The wider parts 2a remain undeformed, while the narrower parts 2b have a bend 9 . The bends 9 are designed so that the long side 6 of the flat tubes 2 of the narrower parts 2b abuts on the long side 6 of the adjacent flat tube 2 , in each case on the long side 6, which belongs to the non-bent, wider part 2a , which the Fig. 19 clearly shows.
In the exemplary embodiment according to FIG. 19, undeformed side parts 30 were used which at the same time close the front openings of the collecting boxes 5 .
23 to 25 to be described below relate to an exemplary embodiment in which the narrow sides 11 of the flat tubes 2 are significantly wider than those in the previously described exemplary embodiment. A variant was therefore chosen here in which the ends 4 of the flat tubes 2 each have two separating cuts 8 on their narrow sides 11 . This creates a central part 2c and two lateral parts 2a, 2b at all ends 4 . 24 and 25 show in detail, the side parts 2a and 2b are in this case of the same size and shape and they both have the bends 9 . The middle part 2c remains undeformed. In particular, it can be seen that these undeformed middle parts 2c have a favorable effect on the soldered connection between the connecting edges 7 of the header boxes 5 and the narrow sides 11 of the flat tubes 2 , because the middle parts 2c are also connected to the connecting edge 7 . The bends 9 are also carried out here so that the long side 6 of the flat tube 2 or the narrower part 2a abuts the long side 6 of the corresponding part 2b of the adjacent flat tube 2 , so that they can be tightly connected by means of soldering. This is also shown in particular by FIGS. 19, 22 and 23.
Shortly below the separating cut 8 in the flat tube ends 4 , the ends 4 of the flat tubes 2 have not yet been separated. There, too, the narrow sides 11 of the flat tubes 2 are already connected to the connecting edges 7 of the header boxes 5 . (Fig. 19, 23) In the flat tubes 2 there is an inner insert, which ensures turbulence in the charge air and efficient heat exchange. Indoor use is not particularly important here, since it is known that the mentioned effect can also be achieved differently, for example by longitudinal beads and / or knobs in the long sides 6 of the flat tubes 2. FIG. 19 further shows that in this exemplary embodiment continuous, deformed side panels 30 were used.
Such side parts 30 also have the next embodiment that is shown in FIGS. 26, 27 and 28. Here, the narrow sides 11 of the flat tubes 2 are first provided with a cutout, as is shown in FIG. 27. The cutout takes up about 50% of the width B of the narrow side 11 of the flat tubes 2 , so that sufficiently wide edges remain on the parts 2a and 2b , which allow a secure connection at the connecting edges 7 .

Claims (21)

Kühler (1) für Kraftfahrzeuge mit einem Rippen (3) - Flachrohr (2) - Block, bestehend aus Flachrohren (2) mit dazwischen angeordneten Rippen (3), wobei die umgeformten Enden (4) der Flachrohre (2) in gegenüberliegende Sammel - oder Umlenkkästen (5) münden und mit den Längsseiten (6) der umgeformten Enden (4) untereinander verbunden sind wobei die Enden (4) der Flachrohre (2) mit den Verbindungsrändern (7) der Sammel - oder Umlenkkästen (5) in Kontakt und mittels Löten verbunden sind,
dadurch gekennzeichnet, daß
die Enden (4) geschweißter oder extrudierter oder gezogener Flachrohre (2) einen Trennschnitt (8) aufweisen, der die Enden (4) der Flachrohre (2) in zwei Teile (2a; 2b) aufteilt, daß mindestens eines der Teile (2a, 2b) eines jeden Flachrohres (2) quer zur Längsrichtung eine Abbiegung (9) aufweist, die zu einer Verbindungsfläche (10) zwischen der Längsseite (6) des Flachrohres (2) und der Längsseite (6) des Teils (2a; 2b) des benachbarten Flachrohres (2) führt und daß die Sammel - oder Umlenkkästen (5) mit ihren Verbindungsrändern (7) bis über die Abbiegung (9) und den aufgetrennten Abschnitt (12) hinweg reichen und mit den Schmalseiten (11) der Flachrohre (2) verbunden sind.Radiator (1) for motor vehicles with a ribs (3) - flat tube (2) - block, consisting of flat tubes (2) with ribs (3) arranged between them, the shaped ends (4) of the flat tubes (2) being arranged in opposite collectors - or deflection boxes (5) open and are connected to one another with the longitudinal sides (6) of the formed ends (4), the ends (4) of the flat tubes (2) being in contact with the connecting edges (7) of the collecting or deflection boxes (5) and are connected by soldering,
characterized in that
the ends (4) of welded or extruded or drawn flat tubes (2) have a separating cut (8) which divides the ends (4) of the flat tubes (2) into two parts (2a; 2b) such that at least one of the parts (2a, 2b) of each flat tube (2) transversely to the longitudinal direction has a bend (9) leading to a connecting surface (10) between the long side (6) of the flat tube (2) and the long side (6) of the part (2a; 2b) leads adjacent flat tube (2) and that the collecting or deflection boxes (5) with their connecting edges (7) extend beyond the bend (9) and the separated section (12) and with the narrow sides (11) of the flat tubes (2) are connected. Kühler nach den Anspruch 1, dadurch gekennzeichnet, daß die Flachrohre (2) Längsnaht (14) geschweißt sind, eine oder mehrere Längssicken (13) aufweisen, die mehrere Strömungskanäle (16) im Flachrohr (2) ausbilden.Cooler according to claim 1, characterized in that the flat tubes (2) are welded longitudinal seam (14), have one or more longitudinal beads (13) which form a plurality of flow channels (16) in the flat tube (2). Kühler nach Anspruch 2, dadurch gekennzeichnet, daß die Längssicken (13) innerhalb des aufgetrennten Abschnitts (12) umformtechnisch beseitigt bzw. glattgedrückt sind.Cooler according to claim 2, characterized in that the longitudinal beads (13) within the separated section (12) have been removed or pressed flat in terms of forming technology. Kühler nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß die Längsnaht (14) außerhalb des Trennschnittes (8), vorzugsweise auf einer Längsseite (6) des Flachrohres (2), in der Nähe einer Schmalseite (11) des Flachrohres (2) angeordnet ist. Cooler according to claims 1 or 2, characterized in that the longitudinal seam (14) outside the separating cut (8), preferably on a longitudinal side (6) of the flat tube (2), in the vicinity of a narrow side (11) of the flat tube (2) is arranged. Kühler nach Anspruch 1, dadurch gekennzeichnet, daß die Flachrohre (2) gezogene oder extrudierte Rohre sind und eine oder mehrere Längswände zur Unterteilung mehrerer Strömungskanäle (16) aufweisen.Cooler according to claim 1, characterized in that the flat tubes (2) are drawn or extruded tubes and have one or more longitudinal walls for dividing a plurality of flow channels (16). Kühler nach Anspruch 1, dadurch gekennzeichnet, daß die Flachrohre (2) keine Längssicken (11) oder Längswände aufweisen und einen Inneneinsatz (14) besitzen.Cooler according to claim 1, characterized in that the flat tubes (2) have no longitudinal beads (11) or longitudinal walls and have an inner insert (14). Kühler nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, daß der Trennschnitt (8) in Richtung des großen Durchmessers (D) der Flachrohre (2), vorzugsweise parallel zu deren Längsseiten (6) angeordnet ist, daß beide Enden (4) bzw. beide Teile (2a; 2b) eines jeden Flachrohres (2) jeweils zwei quer zur Längsrichtung des Flachrohres (2) angeordnete Abbiegungen (9a; 9b) aufweisen, wobei die eine Abbiegung (9b) etwa dort angeordnet ist, wo die Verbindungsfläche (10) der Längsseite (6) des einen Flachrohres (2) mit der Längsseite (6) des benachbarten Flachrohres (2) beginnt und die andere Abbiegung (9a) etwa dort vorgesehen ist, wo der aufgetrennte Abschnitt (12) der Flachrohre (2) beginnt bzw. endet.Cooler according to one of the preceding claims, characterized in that the separating cut (8) is arranged in the direction of the large diameter (D) of the flat tubes (2), preferably parallel to their longitudinal sides (6), that both ends (4) or both parts (2a; 2b) of each flat tube (2) each have two bends (9a; 9b) arranged transversely to the longitudinal direction of the flat tube (2), one bend (9b) being arranged approximately where the connecting surface (10) on the long side (6) one of the flat tubes (2) begins with the long side (6) of the adjacent flat tube (2) and the other bend (9a) is provided approximately where the separated section (12) of the flat tubes (2) begins or ends . Kühler nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß ein Teil (2a) Abbiegungen (9) aufweist und das andere Teil (2b) des Flachrohres (2) gerade bleibt.Cooler according to one of claims 1 to 6, characterized in that one part (2a) has bends (9) and the other part (2b) of the flat tube (2) remains straight. Kühler nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Längsseiten (6) der Flachrohre (2) auf der Seite, auf der sie mit der Längsseite (6) des benachbarten Flachrohres (2) eine Verbindungsfläche (10) bilden im wesentlichen glatt sind.Cooler according to one of the preceding claims, characterized in that the longitudinal sides (6) of the flat tubes (2) are essentially smooth on the side on which they form a connecting surface (10) with the longitudinal side (6) of the adjacent flat tube (2) . Kühler nach Anspruch 9, dadurch gekennzeichnet, daß in der Verbindungsfläche (10) ein oder mehrere Druckfügepunkte (22) angeordnet sind.Cooler according to claim 9, characterized in that one or more pressure joining points (22) are arranged in the connecting surface (10). Kühler nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der mindestens eine Trennschnitt (8) außerhalb der Mittellinie (31) mindestens einer der zwei Schmalseiten (11) der Flachrohrenden (4) angeordnet ist und der Kühler ein Wärmetauscher ist. Cooler according to one of the preceding claims, characterized in that the at least one separating cut (8) is arranged outside the center line (31) of at least one of the two narrow sides (11) of the flat tube ends (4) and the cooler is a heat exchanger. Kühler nach Anspruch 1 und 11, dadurch gekennzeichnet, daß das schmalere Teil (2b) der Enden (4) der Flachrohre (2) umgebogen ist und das breitere Teil (2a) gerade bleibt, so daß die zum schmaleren Teil (2b) gehörende Längsseite (6) des einen Flachrohres (2) an der zum breiteren, geraden Teil (2a) gehörenden Längsseite (6) des Endes (4) des benachbarten Flachrohres (2) anliegt.Cooler according to claims 1 and 11, characterized in that the narrower part (2b) of the ends (4) of the flat tubes (2) is bent over and the wider part (2a) remains straight, so that the long side belonging to the narrower part (2b) (6) one of the flat tubes (2) bears on the longitudinal side (6) of the end (4) of the adjacent flat tube (2) belonging to the wider, straight part (2a). Kühler nach Anspruch 1 und 11, dadurch gekennzeichnet, daß zwei außermittige Trennschnitte (8) in den Schmalseiten (11) der Enden (4) der Flachrohre (2) angeordnet sind, wobei ein Mittelteil (2c) unverformt ist und beide seitlichen Teile (2a; 2b) abgebogen sind, so daß ihre Längsseiten (6) an den Längsseiten (6) benachbarter Flachrohrenden (4) anliegen.Cooler according to claims 1 and 11, characterized in that two off-center separating cuts (8) are arranged in the narrow sides (11) of the ends (4) of the flat tubes (2), a central part (2c) being undeformed and both side parts (2a ; 2b) are bent so that their long sides (6) rest on the long sides (6) of adjacent flat tube ends (4). Kühler nach Anspruch 1, dadurch gekennzeichnet, daß der Trennschnitt (8) mittels eines symmetrischen oder asymmetrischen Ausschnitts der Schmalseiten (11) gebildet ist.Cooler according to claim 1, characterized in that the separating cut (8) is formed by means of a symmetrical or asymmetrical cutout of the narrow sides (11). Kühler nach Anspruch14, dadurch gekennzeichnet, daß die Breite des Ausschnitts vorzugsweise nicht größer ist als 70% der Breite (B) der Schmalseiten (11).Cooler according to claim 14, characterized in that the width of the cutout is preferably not greater than 70% of the width (B) of the narrow sides (11). Verfahren zur Herstellung der Kühler oder Wärmetauscher nach Anspruch 1 oder einem der Ansprüche 2 bis 15, bei dem der Rippen (3) - Flachrohr (2)- Block mit den Sammel - oder Umlenkkästen (5) gleichzeitig verlötet wird,
dadurch gekennzeichnet, daß
die Enden (4) der Flachrohre (2 aufgetrennt und mindestens eines der nach dem Auftrennen entstandenen zwei Teile (2a; 2b) eines jeden Endes (4) der Flachrohre (2) quer zur Längsrichtung der Flachrohre (2) abgebogen wird, um mit der Längsseite (6) des benachbarten Flachrohres (2) eine Verbindungsfläche (10) zu bilden, daß die Sammel - oder Umlenkkästen (5) mit ihren Verbindungsrändern (7) über den Rippen - Flachrohr - Block geschoben und die Verbindungsränder (7) mit den Schmalseiten (11) der aufgetrennten Enden (4) der Flachrohre (2) verbunden werden.Method for producing the cooler or heat exchanger according to Claim 1 or one of Claims 2 to 15, in which the fins (3) - flat tube (2) - block are soldered to the collecting or deflecting boxes (5) at the same time,
characterized in that
the ends (4) of the flat tubes (2 are separated and at least one of the two parts (2a; 2b) of each end (4) of the flat tubes (2) formed after the separation is bent transversely to the longitudinal direction of the flat tubes (2) in order to be able to bend To form a connecting surface (10) on the long side (6) of the adjacent flat tube (2), that the collecting or deflection boxes (5) with their connecting edges (7) are pushed over the ribbed flat tube block and the connecting edges (7) with the narrow sides (11) of the separated ends (4) of the flat tubes (2) are connected. Verfahren nach Anspruch 16, dadurch gekennzeichnet, daß das Auftrennen mit einem Laserstrahl oder einem Flüssigkeitsstrahl oder mittels üblicher Trennmittel vorzugsweise parallel zu und in der Mitte zwischen beiden Längsseiten (6) der Flachrohre (2) erfolgt.A method according to claim 16, characterized in that the cutting is carried out with a laser beam or a liquid jet or by means of conventional separating means, preferably parallel to and in the middle between the two long sides (6) of the flat tubes (2). Verfahren nach den Ansprüche 16 oder 17, dadurch gekennzeichnet, daß alle Teile (2a und 2b) der Flachrohre (2) einfach oder zweifach quer zur Längsrichtung der Flachrohre (2) abgebogen werden.Method according to claims 16 or 17, characterized in that all parts (2a and 2b) of the flat tubes (2) are bent once or twice transversely to the longitudinal direction of the flat tubes (2). Verfahren nach einem der Ansprüche 16 bis 18, dadurch gekennzeichnet, daß das Abbiegen der Teile (2a, 2b) nach dem Auftrennen erfolgt und danach der Rippen (3) - Rohr (2) - Block zusammengefügt wird.Method according to one of claims 16 to 18, characterized in that the bending of the parts (2a, 2b) takes place after the separation and then the fins (3) - tube (2) - block is assembled. Verfahren nach einem der Ansprüche 16 bis 18, dadurch gekennzeichnet, daß das Abbiegen der Teile (2a; 2b) nach dem Zusammenfügen des Rippen (3) - Rohr (2) - Blockes erfolgt.Method according to one of claims 16 to 18, characterized in that the bending of the parts (2a; 2b) takes place after the ribs (3) - tube (2) - block have been joined together. Verfahren nach einem der vorstehenden Ansprüche 16 bis 20, dadurch gekennzeichnet, daß am zusammengefügten Rippen (3) - Rohr (2) - Block Druckfügepunkte (22) in der Verbindungsfläche (10) bzw. zwischen den anliegenden Längsseiten (6) der Teile (2a; 2b) angebracht werden.Method according to one of the preceding claims 16 to 20, characterized in that on the joined ribs (3) - tube (2) - block pressure joining points (22) in the connecting surface (10) or between the adjacent longitudinal sides (6) of the parts (2a ; 2b) are attached.
EP01107034A 2000-04-19 2001-03-21 Radiator for vehicles Expired - Lifetime EP1148312B1 (en)

Applications Claiming Priority (4)

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DE2000119268 DE10019268A1 (en) 2000-03-31 2000-04-19 Vehicle refrigerator; has block with ribs arranged between flat pipes, where flat pipes open into opposite collecting guiding tanks and have bent separated sections connected to adjacent flat pipes
DE10019268 2000-04-19
DE2000160006 DE10060006A1 (en) 2000-12-02 2000-12-02 Vehicle refrigerator; has block with ribs arranged between flat pipes, where flat pipes open into opposite collecting guiding tanks and have bent separated sections connected to adjacent flat pipes
DE10060006 2000-12-02

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US5725563A (en) * 1993-04-21 1998-03-10 Klotz; Antoine Electronic device and method for adrenergically stimulating the sympathetic system with respect to the venous media
DE102004053892A1 (en) * 2004-11-09 2006-05-11 Modine Manufacturing Co., Racine Heat transformer, has flat tubes with flow separation that is performed by longitudinal crimp supported at non deformed side of tubes, where crimp in ends of tubes changes by deformation in side of tubes
US8002022B2 (en) 2005-09-16 2011-08-23 Behr Gmbh & Co. Kg Heat exchanger, in particular exhaust gas heat exchanger for motor vehicles

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DE10147192A1 (en) 2001-09-25 2003-04-17 Modine Mfg Co Heat exchanger with a finned flat tube block and manufacturing process
US7195060B2 (en) * 2005-04-01 2007-03-27 Dana Canada Corporation Stacked-tube heat exchanger
US8646516B2 (en) * 2006-08-17 2014-02-11 Pana Canada Corporation Alternating plate headerless heat exchangers
DE102011077838A1 (en) * 2011-06-20 2012-12-20 Behr Gmbh & Co. Kg Heat exchanger and method for producing a heat exchanger
DE102014206612A1 (en) * 2014-04-04 2015-10-29 Mahle International Gmbh heat exchangers
JP2017009191A (en) * 2015-06-22 2017-01-12 株式会社ティラド Temporary assembly means of header plate and core of heat exchanger
JP7244439B2 (en) * 2017-12-27 2023-03-22 株式会社ティラド Header plateless heat exchanger

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DE1551448A1 (en) 1967-02-17 1970-04-16 Daimler Benz Ag Heat exchangers, especially for portable gas turbines
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EP0775884A2 (en) * 1995-11-25 1997-05-28 Behr GmbH & Co. Heat exchanger and process for manufacturing same

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CH378353A (en) * 1960-09-01 1964-06-15 Urech Karl Heat exchanger with plate-shaped exchange elements
DE1551448A1 (en) 1967-02-17 1970-04-16 Daimler Benz Ag Heat exchangers, especially for portable gas turbines
DE1951138A1 (en) * 1968-10-11 1970-04-23 Vmw Ranshofen Berndorf Ag Light metal radiator for transformers
GB1304284A (en) * 1969-02-21 1973-01-24
US5392849A (en) * 1990-09-28 1995-02-28 Matsushita Refrigeration Company Layer-built heat exchanger
EP0775884A2 (en) * 1995-11-25 1997-05-28 Behr GmbH & Co. Heat exchanger and process for manufacturing same
DE19543986A1 (en) 1995-11-25 1997-05-28 Behr Gmbh & Co Heat exchanger and a method of manufacturing a heat exchanger

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US5725563A (en) * 1993-04-21 1998-03-10 Klotz; Antoine Electronic device and method for adrenergically stimulating the sympathetic system with respect to the venous media
DE102004053892A1 (en) * 2004-11-09 2006-05-11 Modine Manufacturing Co., Racine Heat transformer, has flat tubes with flow separation that is performed by longitudinal crimp supported at non deformed side of tubes, where crimp in ends of tubes changes by deformation in side of tubes
US8002022B2 (en) 2005-09-16 2011-08-23 Behr Gmbh & Co. Kg Heat exchanger, in particular exhaust gas heat exchanger for motor vehicles

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US20010037878A1 (en) 2001-11-08
DE50102959D1 (en) 2004-09-02
ES2225332T3 (en) 2005-03-16
EP1148312B1 (en) 2004-07-28
ATE272201T1 (en) 2004-08-15

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