EP2507573A1 - Heat exchanger having a positively positioned header box - Google Patents

Heat exchanger having a positively positioned header box

Info

Publication number
EP2507573A1
EP2507573A1 EP10787384A EP10787384A EP2507573A1 EP 2507573 A1 EP2507573 A1 EP 2507573A1 EP 10787384 A EP10787384 A EP 10787384A EP 10787384 A EP10787384 A EP 10787384A EP 2507573 A1 EP2507573 A1 EP 2507573A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
flat tubes
exchanger according
collector box
segments
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Withdrawn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
EP10787384A
Other languages
German (de)
French (fr)
Inventor
Jens Nies
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2507573A1 publication Critical patent/EP2507573A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • 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
    • 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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/14—Fastening; Joining by using form fitting connection, e.g. with tongue and groove

Definitions

  • the invention relates to a heat exchanger with a form-fitting fixed collector box according to the preamble of claim 1.
  • collector boxes for example coolant radiators for a motor vehicle, it is known to fix collector boxes in a form-fitting manner at a bottom of a soldered block of pipes and ribs, for example by means of corrugated-slot flange. In this case, a u O-ring seal between the collector box and the bottom is inserted, wherein the bottom is formed as a formed sheet metal part with punched passages.
  • the holding structure comprises a plurality of retaining troughs which rise on the edge above the ground.
  • the crenellated design ensures a simple bending and a uniformly distributed holding force on the collector box.
  • this shaping can be achieved by simple machining measures such as partial sawing or else complete sawing of an extruded profile.
  • the base comprises a plurality of segments each formed as extruded profile part, wherein the segments and the flat tubes are alternately stacked on each other.
  • a design of the floor as a package system allows in a simple way the construction of the floors of standardized common parts, which is particularly advantageous for small batches.
  • a contact surface between the flat tube end and the side surface of the base segments can be designed to be particularly large and thus mechanically strong and leakproof.
  • the portion of the bottom has a plurality of passages for respectively receiving the flat tubes.
  • Such passages can be introduced by punching, milling, sawing or other suitable means in a base of an extruded profile part.
  • the flat tubes are generally advantageously designed as extruded profile parts, but depending on the requirements, they can also be formed as folded sheet metal parts.
  • the flat tubes are each composed of several components, in particular rods and cover plates, assembled ("bar-and-plate” flat tubes).
  • the flat tubes in a narrow-side edge region have a solid cross section, wherein the cross section forms part of a sealing surface. This is especially in a training of the floor of several separate segments (package system) against a simple and effective sealing of the collector box against the ground.
  • the cross section in a depth direction has a diameter of between approximately 1 mm and approximately 5 mm, in particular between approximately 2 mm and approximately 4 mm. This ensures a sufficient sealing surface.
  • the flat tubes preferably have a narrow diameter between about 1.5 mm and about 10 mm.
  • the heat exchanger may be a coolant radiator or an intercooler of an internal combustion engine, with a charge intercooler regularly opening slightly wider tubes, e.g. between 4 mm and 10 mm, and a coolant cooler regularly includes slightly narrower tubes between about 1, 5 mm and about 4 mm.
  • a fixedly applied seal is provided between the collector box and the bottom.
  • Such seals are also referred to as "Formed In Place Gaskets" (FIPG), which may be a paste-like, completely or partially curing sealant which is preferably applied automatically by means of a robotic arm Profile as ground against, as can be dispensed with a circumferential sealing groove for insertion of an O-ring seal.
  • FIPG Form In Place Gaskets
  • an embodiment according to the invention may comprise a lateral end plate parallel to the stack of flat tubes, wherein the end plate likewise has a holding structure for the form-fitting retention of the collector box.
  • the collector box can be kept circumferentially, namely the longitudinal side by the edge-side support structure of the soil and narrow side by the support structures of the end plates.
  • Fig. 1 shows a perspective view of a heat exchanger according to the invention.
  • Fig. 2 shows the heat exchanger of Fig. 1 without collector box.
  • Fig. 3 shows the heat exchanger of Fig. 2 without end plate.
  • FIG. 4 shows a detailed spatial view of the bottom of the heat exchanger from FIG. 1.
  • Fig. 5 shows the heat exchanger of Fig. 3 without seal.
  • the heat exchanger shown in Fig. 1 of a first embodiment is designed as a coolant radiator for the internal combustion engine of a motor vehicle.
  • the heat exchanger comprises a plurality of flat tubes 1 stacked in a width direction of the heat exchanger, between each of which a layer of ribs 2 is arranged.
  • the flat tubes 1 are received with their end portions in each case in a bottom 3 of the heat exchanger, each received in a bottom 3 of the heat exchanger, wherein the bottom 3 and a seal 4 sealingly arranged on the collector box 5 together form a collector of the heat exchanger.
  • the collector box 5 in the present case has a connection 5a for the supply or discharge of a fluid.
  • a second bottom and a second header box are arranged in the same construction.
  • the collector boxes can be made of plastic or metal depending on requirements.
  • the base 3 is presently not listed as a one-piece component, but is formed from a plurality of separate sections or segments 3a, 3b.
  • the segments 3a, 3b are alternately stacked alternately in alternation with the flat tubes in the manner of a package construction, so that side surfaces of the segments 3a, 3b are each soldered in a planar manner to the end regions of the broad sides of the flat tubes 1.
  • All of the segments 3a, 3b are sections of extruded profile parts, which may be reworked if necessary. Segments of a first type 3a are each arranged between two flat tubes, wherein a total of two segments of a second type 3b are arranged on the end side of the stack. All of the segments 3a, 3b have at one in the depth direction and air flow direction front and rear end each one above the plane of the bottom 3 towering holding tine 6.
  • the Haltezin- NEN 6 are formed sufficiently thin to after placing the collector box 5 for positive fit holder to be bent.
  • the bent retaining tongues (not shown) are then clamped or crimped over an edge-side collar 5b of the collector box 5, so that the collector box is fixed in a form-fitting manner.
  • the pinnacles 6 of the segments 3 a, 3 b thus form a total of an edge-holding structure of the bottom 3.
  • the segments 3a, 3b differ from each other only in that the middle segments 3b have a shoulder 7 spaced from the pinnacles 6, so that the edge of the collector box 5 is supported inwardly.
  • the terminal segments 3b do not have these paragraphs 7, since they would be the circulation of Sammlerkastenrandes in the way.
  • the terminal segments 3b can also be produced by reworking the middle segments 3a, so that overall only one type of extruded profile or extruded profile is required, from which the segments 3 are sawed off.
  • the peripheral gasket 4 is not formed as a prefabricated O-ring gasket, but as a fixed-molded gasket (FIPG) Due to the stacked construction of the bottom 3, parts of the tops of the flat tubes 1 form parts the surface overlaid by the gasket 4.
  • the flat tubes 1 In order to form a sufficient sealing surface, the flat tubes 1 have a region of solid cross-section 1 a which has a width b of about 3 mm in the depth direction of the heat exchanger, the thickness d of the flat tubes in their narrow direction is about 2 mm.
  • the flat tubes are each formed as extruded profiles or extruded profiles. In the present case, they are designed as multi-chamber tubes with webs between adjacent passages.
  • the broad sides of the flat tubes 1 are solder-plated, so that both a soldering with the ribs 2 and with the segments 3 a, 3 b of the bottom 3 can be done in a brazing furnace.
  • Alternative or supplementary solder cladding of the individual components is also conceivable.
  • the heat exchanger is closed in the stacking direction at the end by two end plates 8, which also have bendable holding structures 8a with crenels 6 'at their ends for positive retention of the collector box 5.
  • the holding structures 8a may also be formed as a continuous tab or it may be dispensed with a narrow-side determination of Sammlerkastens.
  • the base 3 is not produced in packaged fashion, but essentially in one piece or as a single bottom section. For this purpose, with otherwise the same shape connecting webs between the segments 3 are left or instead of a complete sawing formed only passages for the flat tubes. These passages can be formed by punching, milling, sawing or other processing measures.

Landscapes

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

Abstract

The invention relates to a heat exchanger having a positively positioned header box (5), comprising a floor (3) having a retaining structure (6) on the edge thereof, a plurality of flat tubes (1) disposed in parallel, each opening into the floor, and a header box (5), wherein the header box is positively positioned on the floor (3) by means of the retaining structure (6), wherein at least one section of the floor (3) having the retaining structure at the edge thereof is implemented as an extruded profile part.

Description

Wärmetauscher mit formschlüssig festgelegtem  Heat exchangers with positively fixed
Sammlerkasten  collector's box
Die Erfindung betrifft einen Wärmetauscher mit formschlüssig festgelegtem Sammlerkasten nach dem Oberbegriff des Anspruchs 1 . The invention relates to a heat exchanger with a form-fitting fixed collector box according to the preamble of claim 1.
Aus der Praxis des Baus von Wärmetauschern, zum Beispiel Kühlmittelkühlern für ein Kraftfahrzeug, ist es bekannt, Sammlerkästen formschlüssig an einem Boden eines verlöteten Blocks aus Rohren und Rippen festzulegen, zum Beispiel mittels Wellschlitz-Bördelung. Dabei wird eine u O-Ring- Dichtung zwischen Sammlerkasten und Boden eingelegt, wobei der Boden als umgeformtes Blechteil mit ausgestanzten Durchzügen ausgebildet ist. From the practice of building heat exchangers, for example coolant radiators for a motor vehicle, it is known to fix collector boxes in a form-fitting manner at a bottom of a soldered block of pipes and ribs, for example by means of corrugated-slot flange. In this case, a u O-ring seal between the collector box and the bottom is inserted, wherein the bottom is formed as a formed sheet metal part with punched passages.
Es ist die Aufgabe der Erfindung, einen Wärmetauscher mit formschlüssig festgelegtem Sammlerkasten anzugeben, der auf einfache Weise an ver- schiedene Baugrößen anpassbar ist. It is the object of the invention to provide a heat exchanger with a form-fitting fixed collector box, which is easily adaptable to different sizes.
Diese Aufgabe wird für einen eingangs genannten Wärmetauscher erfindungsgemäß mit den kennzeichnenden Merkmalen des Anspruchs 1 gelöst. Durch die zumindest abschnittsweise Ausbildung des Bodens als extrudier- tes Profilteil kann eine einfache Änderung zum Beispiel eine Anzahl der Flachrohre erfolgen, ohne dass aufwendige Formwerkzeuge hergestellt werden müssen, wie sie etwa für aus Blechen geformte Böden erforderlich sind. Die Ausbildung einer randseitigen Haltestruktur ist durch geeignete Formgebung des extrudierten Profilteils besonders leicht möglich, zum Beispiel durch einen zum Zweck einer Umbiegung entsprechend dünn ausgebildeten Bereich. This object is achieved according to the invention for a heat exchanger mentioned above with the characterizing features of claim 1. As a result of the at least partial formation of the floor as an extruded profile part, a simple change can be made, for example, by a number of flat tubes, without the need for elaborate molding tools, such as those required for trays made of sheet metal. The formation of a peripheral holding structure is particularly easily possible by suitable shaping of the extruded profile part, for example by an area correspondingly thin for the purpose of a bend.
Bei einer bevorzugten Ausführungsform der Erfindung umfasst die Halte- struktur eine Mehrzahl von randseitig über dem Boden aufragenden Haltezinnen. Durch die zinnenförmige Ausgestaltung ist ein einfaches Umbiegen und eine gleichmäßig verteilte Haltekraft an dem Sammlerkasten gewährleistet. Zudem ist diese Formgebung durch einfache Bearbeitungsmaßnahmen wie teilweises Einsägen oder auch vollständiges Absägen eines extru- dierten Profils erzielbar. In a preferred embodiment of the invention, the holding structure comprises a plurality of retaining troughs which rise on the edge above the ground. The crenellated design ensures a simple bending and a uniformly distributed holding force on the collector box. In addition, this shaping can be achieved by simple machining measures such as partial sawing or else complete sawing of an extruded profile.
Bei einer besonders bevorzugten Ausführungsform der Erfindung umfasst der Boden eine Mehrzahl von jeweils als extrudiertes Profilteil ausgebildeten Segmenten, wobei die Segmente und die Flachrohre abwechselnd aufein- ander gestapelt sind. Eine solche Gestaltung des Bodens als Paketsystem ermöglicht auf einfache Weise den Bau der Böden aus standardisierten Gleichteilen, was insbesondere bei Kleinserien vorteilhaft ist. Zudem kann je nach Anforderungen eine Kontaktfläche zwischen Flachrohrende und Seitenfläche der Bodensegmente besonders groß und somit mechanisch fest und leckdicht ausgelegt sein. In a particularly preferred embodiment of the invention, the base comprises a plurality of segments each formed as extruded profile part, wherein the segments and the flat tubes are alternately stacked on each other. Such a design of the floor as a package system allows in a simple way the construction of the floors of standardized common parts, which is particularly advantageous for small batches. In addition, depending on the requirements, a contact surface between the flat tube end and the side surface of the base segments can be designed to be particularly large and thus mechanically strong and leakproof.
Bei einer alternativen oder ergänzenden Ausführungsform hat der Abschnitt des Bodens eine Mehrzahl von Durchzügen zur jeweiligen Aufnahme der Flachrohre. Solche Durchzüge können durch Stanzen, Fräsen, Sägen oder andere geeignete Maßnahme in eine Grundfläche eines extrudierten Profilteils eingebracht werden. In an alternative or supplementary embodiment, the portion of the bottom has a plurality of passages for respectively receiving the flat tubes. Such passages can be introduced by punching, milling, sawing or other suitable means in a base of an extruded profile part.
Allgemein vorteilhaft sind die Flachrohre als extrudierte Profilteile ausgebildet, je nach Anforderungen können sie aber auch als gefaltete Blechteile ausgeformt sein. Bei einer alternativen Ausführungsform sind die Flachrohre jeweils aus mehreren Bauteilen, insbesondere Stäben und Deckplatten, zusammengesetzt (,,bar-and-plate"-Flachrohre). The flat tubes are generally advantageously designed as extruded profile parts, but depending on the requirements, they can also be formed as folded sheet metal parts. In an alternative embodiment, the flat tubes are each composed of several components, in particular rods and cover plates, assembled ("bar-and-plate" flat tubes).
Bei einer besonders bevorzugten Ausgestaltung der Erfindung haben die Flachrohre in einem schmalseitigen Randbereich einen massiven Querschnitt, wobei der Querschnitt einen Teil einer Dichtfläche ausbildet. Dies kommt insbesondere bei einer Ausbildung des Bodens aus mehren separaten Segmenten (Paketsystem) einer einfachen und effektiven Abdichtung des Sammlerkastens gegenüber dem Boden entgegen. In bevorzugter De- tailgestaltung hat dabei der Querschnitt in einer Tiefenrichtung einen Durchmesser zwischen etwa 1 mm und etwa 5 mm, insbesondere zwischen etwa 2 mm und etwa 4 mm. Dies stellt eine ausreichende Dichtfläche sicher. In a particularly preferred embodiment of the invention, the flat tubes in a narrow-side edge region have a solid cross section, wherein the cross section forms part of a sealing surface. This is especially in a training of the floor of several separate segments (package system) against a simple and effective sealing of the collector box against the ground. In a preferred detailed design, the cross section in a depth direction has a diameter of between approximately 1 mm and approximately 5 mm, in particular between approximately 2 mm and approximately 4 mm. This ensures a sufficient sealing surface.
Allgemein bevorzugt haben die Flachrohre einen schmalen Durchmesser zwischen etwa 1 ,5 mm und etwa 10 mm. Der Wärmetauscher kann insbesondere ein Kühlmittelkühler oder ein Ladeluftkühler eines Verbrennungsmotors sein, wobei ein Ladeluftkühler regelmäßig etwas breitere Rohre, z.B. zwischen 4 mm und 10 mm, umfasst und ein Kühlmittelkühler regelmäßig etwas schmalere Rohre zwischen etwa 1 ,5 mm und etwa 4 mm. Generally, the flat tubes preferably have a narrow diameter between about 1.5 mm and about 10 mm. In particular, the heat exchanger may be a coolant radiator or an intercooler of an internal combustion engine, with a charge intercooler regularly opening slightly wider tubes, e.g. between 4 mm and 10 mm, and a coolant cooler regularly includes slightly narrower tubes between about 1, 5 mm and about 4 mm.
Bei einer besonders bevorzugten Detailgestaltung der Erfindung ist zwischen dem Sammlerkasten und dem Boden eine ortsfest aufgebrachte Dichtung vorgesehen. Solche Dichtungen werden auch als „Formed In Place Gaskets" (FIPG) bezeichnet. Es kann sich etwa um eine pastöse, ganz oder teilweise aushärtende Dichtmasse handeln, die bevorzugt automatisiert mittels eines Roboterarms aufgetragen wird. Diese Art der Abdichtung kommt der erfindungsgemäßen Verwendung eines extrudierten Profils als Boden entgegen, da auf eine umlaufende Dichtungsnut zur Einlegung einer O-Ring- Dichtung verzichtet werden kann. Allgemein vorteilhaft kann eine erfindungsgemäße Ausführungsform eine seitliche Abschlussplatte parallel zu dem Stapel von Flachrohren umfassen, wobei die Abschlussplatte ebenfalls eine Haltestruktur zur formschlüssigen Halterung des Sammlerkastens aufweist. Somit kann der Sammlerkasten umlaufend gehalten werden, nämlich längsseitig durch die randseitige Haltestruktur des Bodens und schmalseitig durch die Haltestrukturen der Abschlussplatten. In a particularly preferred detailed design of the invention, a fixedly applied seal is provided between the collector box and the bottom. Such seals are also referred to as "Formed In Place Gaskets" (FIPG), which may be a paste-like, completely or partially curing sealant which is preferably applied automatically by means of a robotic arm Profile as ground against, as can be dispensed with a circumferential sealing groove for insertion of an O-ring seal. In general terms, an embodiment according to the invention may comprise a lateral end plate parallel to the stack of flat tubes, wherein the end plate likewise has a holding structure for the form-fitting retention of the collector box. Thus, the collector box can be kept circumferentially, namely the longitudinal side by the edge-side support structure of the soil and narrow side by the support structures of the end plates.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus den nachfol- gend beschriebenen Ausführungsbeispielen sowie aus den abhängigen Ansprüchen. Further advantages and features of the invention will become apparent from the embodiments described below and from the dependent claims.
Nachfolgend werden mehrere Ausführungsbeispiele der Erfindung beschrieben und anhand der anliegenden Zeichnungen näher erläutert. Hereinafter, several embodiments of the invention will be described and explained in more detail with reference to the accompanying drawings.
Fig. 1 zeigt eine räumliche Ansicht eines erfindungsgemäßen Wärmetauschers. Fig. 1 shows a perspective view of a heat exchanger according to the invention.
Fig. 2 zeigt den Wärmetauscher aus Fig. 1 ohne Sammlerkasten.  Fig. 2 shows the heat exchanger of Fig. 1 without collector box.
Fig. 3 zeigt den Wärmetauscher aus Fig. 2 ohne Abschlussplatte.  Fig. 3 shows the heat exchanger of Fig. 2 without end plate.
Fig. 4 zeigt eine räumliche Detailansicht des Bodens des Wärmetauschers aus Fig. 1 .  4 shows a detailed spatial view of the bottom of the heat exchanger from FIG. 1.
Fig. 5 zeigt den Wärmetauscher aus Fig. 3 ohne Dichtung.  Fig. 5 shows the heat exchanger of Fig. 3 without seal.
Der in Fig. 1 gezeigte Wärmetauscher eines ersten Ausführungsbeispiels ist als Kühlmittelkühler für den Verbrennungsmotor eines Kraftfahrzeugs ausgebildet. The heat exchanger shown in Fig. 1 of a first embodiment is designed as a coolant radiator for the internal combustion engine of a motor vehicle.
Der Wärmetauscher umfasst eine Mehrzahl von in einer Breitenrichtung des Wärmetauschers gestapelten Flachrohren 1 , zwischen denen jeweils eine Lage von Rippen 2 angeordnet ist. Die Flachrohre 1 sind mit ihren Endbereichen jeweils in einem Boden 3 des Wärmetauschers aufgenommen, chen jeweils in einem Boden 3 des Wärmetauschers aufgenommen, wobei der Boden 3 und ein mittels einer Dichtung 4 dichtend darauf angeordneter Sammlerkasten 5 zusammen einen Sammler des Wärmetauschers ausbilden. Der Sammlerkasten 5 verfügte vorliegend über einen Anschluss 5a zur Zuführung oder Abführung eines Fluids. An dem nicht dargestellten, gegenüberliegenden Ende des Wärmetauschers sind in gleicher Bauweise ein zweiter Boden und ein zweiter Sammlerkasten angeordnet. Die Sammlerkästen können je nach Anforderungen aus Kunststoff oder auch Metall bestehen. The heat exchanger comprises a plurality of flat tubes 1 stacked in a width direction of the heat exchanger, between each of which a layer of ribs 2 is arranged. The flat tubes 1 are received with their end portions in each case in a bottom 3 of the heat exchanger, each received in a bottom 3 of the heat exchanger, wherein the bottom 3 and a seal 4 sealingly arranged on the collector box 5 together form a collector of the heat exchanger. The collector box 5 in the present case has a connection 5a for the supply or discharge of a fluid. At the opposite end of the heat exchanger, not shown, a second bottom and a second header box are arranged in the same construction. The collector boxes can be made of plastic or metal depending on requirements.
Der Boden 3 ist vorliegend nicht als einstückiges Bauteil aufgeführt, sondern wird aus einer Mehrzahl separater Abschnitte bzw. Segmente 3a, 3b gebildet. Die Segmente 3a, 3b werden nach Art einer Paketbauweise abwechselnd im Wechsel mit den Flachrohren aufeinander gestapelt, so dass Sei- tenflächen der Segmente 3a, 3b jeweils flächig mit den Endbereichen der breiten Seiten der Flachrohre 1 flächig verlötet sind. The base 3 is presently not listed as a one-piece component, but is formed from a plurality of separate sections or segments 3a, 3b. The segments 3a, 3b are alternately stacked alternately in alternation with the flat tubes in the manner of a package construction, so that side surfaces of the segments 3a, 3b are each soldered in a planar manner to the end regions of the broad sides of the flat tubes 1.
Sämtliche der Segmente 3a, 3b sind Abschnitte von extrudierten Profilteilen, die gegebenenfalls nachbearbeitet sein können. Segmente einer ersten Bauart 3a sind jeweils zwischen zwei Flachrohren angeordnet, wobei insgesamt zwei Segmente einer zweiten Bauart 3b endseitig des Stapels angeordnet sind. Sämtliche der Segmente 3a, 3b haben an einem in Tiefenrichtung bzw. Luft-Durchströmungsrichtung vorderen und hinteren Ende jeweils eine über die Ebene des Bodens 3 aufragende Haltezinne 6. Die Haltezin- nen 6 sind ausreichend dünn ausgebildet, um nach einem Aufsetzen des Sammlerkastens 5 zur formschlüssigen Halterung umgebogen zu werden. Die umgebogenen Haltezinnen (nicht dargestellt) sind dann über einen rand- seitigen Kragen 5b des Sammlerkastens 5 verklammert bzw. vercrimpt, so dass der Sammlerkasten formschlüssig festgelegt ist. Die Zinnen 6 der Segmente 3a, 3b bilden somit insgesamt eine randseitige Haltestruktur des Bodens 3 aus. All of the segments 3a, 3b are sections of extruded profile parts, which may be reworked if necessary. Segments of a first type 3a are each arranged between two flat tubes, wherein a total of two segments of a second type 3b are arranged on the end side of the stack. All of the segments 3a, 3b have at one in the depth direction and air flow direction front and rear end each one above the plane of the bottom 3 towering holding tine 6. The Haltezin- NEN 6 are formed sufficiently thin to after placing the collector box 5 for positive fit holder to be bent. The bent retaining tongues (not shown) are then clamped or crimped over an edge-side collar 5b of the collector box 5, so that the collector box is fixed in a form-fitting manner. The pinnacles 6 of the segments 3 a, 3 b thus form a total of an edge-holding structure of the bottom 3.
Die Segmente 3a, 3b unterscheiden sich nur dadurch voneinander, dass die mittleren Segmente 3b über einen von den Zinnen 6 beabstandeten Absatz 7 verfügen, so dass der Rand des Sammlerkastens 5 nach innen abgestützt ist. Die endständigen Segmente 3b haben diese Absätze 7 nicht, da sie dem Umlauf des Sammlerkastenrandes im Weg wären. Je nach Steifigkeit des Sammlerkastens 5 kann auf die Absätze 7 verzichtet werden. Die endständi- gen Segmente 3b können auch durch Nachbearbeitung der mittleren Segmente 3a hergestellt werden, so dass insgesamt nur eine Art von extrudier- tem Profil bzw. Strangpressprofil erforderlich ist, aus dem dann die Segmente 3 abgesägt werden. Die umlaufende Dichtung 4 ist nicht als vorgefertigte O-Ring-Dichtung ausgebildet, sondern als ortsfest aufgebrachte Dichtung bzw.„Formed-In-Place- Gasket" (FIPG). Aufgrund der gestapelten Bauweise des Bodens 3 bilden Teile der Oberseiten der Flachrohre 1 Teile der von der Dichtung 4 überlagerten Fläche aus. Um eine ausreichend Dichtfläche auszubilden, haben die Flachrohre 1 einen Bereich massiven Querschnitts 1 a. Dieser hat in der Tiefenrichtung des Wärmetauschers eine Breite b von vorliegend etwa 3 mm. Die Dicke d der Flachrohre in ihrer Schmalrichtung beträgt etwa 2 mm. The segments 3a, 3b differ from each other only in that the middle segments 3b have a shoulder 7 spaced from the pinnacles 6, so that the edge of the collector box 5 is supported inwardly. The terminal segments 3b do not have these paragraphs 7, since they would be the circulation of Sammlerkastenrandes in the way. Depending on the rigidity of the collector box 5 can be dispensed paragraphs 7. The terminal segments 3b can also be produced by reworking the middle segments 3a, so that overall only one type of extruded profile or extruded profile is required, from which the segments 3 are sawed off. The peripheral gasket 4 is not formed as a prefabricated O-ring gasket, but as a fixed-molded gasket (FIPG) Due to the stacked construction of the bottom 3, parts of the tops of the flat tubes 1 form parts the surface overlaid by the gasket 4. In order to form a sufficient sealing surface, the flat tubes 1 have a region of solid cross-section 1 a which has a width b of about 3 mm in the depth direction of the heat exchanger, the thickness d of the flat tubes in their narrow direction is about 2 mm.
Die Flachrohre sind jeweils als extrudierte Profile bzw. Strangpressprofile ausgebildet. Vorliegend sind sie als Mehrkammerrohre mit Stegen zwischen benachbarten Durchlässen ausgebildet. Zweckmäßig sind die Breitseiten der Flachrohre 1 lotplattiert, so dass sowohl eine Verlötung mit den Rippen 2 als auch mit den Segmenten 3a, 3b des Bodens 3 in einem Lötofen erfolgen kann. Auch alternative oder ergänzende Lotplattierungen der einzelnen Bau- teile sind denkbar. Der Wärmetauscher wird in Stapelrichtung endseitig von zwei Abschlussplatten 8 abgeschlossen, die an ihren Enden ebenfalls verbiegbare Haltestrukturen 8a mit Zinnen 6' zur formschlüssigen Halterung des Sammlerkas- tens 5 aufweisen. Je nach Auslegung und Tiefe des Wärmetauschers können die Haltestrukturen 8a auch als durchgängige Lasche ausgebildet sein oder es kann auf eine schmalseitige Festlegung des Sammlerkastens verzichtet werden. Bei einem zweiten Ausführungsbeispiel der Erfindung (nicht dargestellt) ist der Boden 3 im Unterschied zum ersten Ausführungsbeispiel nicht in Paketbauweise, sondern im Wesentlichen einstückig bzw. als ein einziger Bodenabschnitt hergestellt. Hierzu werden bei sonst gleicher Formgebung Verbindungsstege zwischen den Segmenten 3 stehen gelassen bzw. anstelle eines vollständigen Absägens nur Durchzüge für die Flachrohre ausgebildet. Diese Durchzüge können durch Stanzen, Fräsen, Sägen oder sonstige Bearbeitungsmaßnahmen ausgebildet werden. The flat tubes are each formed as extruded profiles or extruded profiles. In the present case, they are designed as multi-chamber tubes with webs between adjacent passages. Suitably, the broad sides of the flat tubes 1 are solder-plated, so that both a soldering with the ribs 2 and with the segments 3 a, 3 b of the bottom 3 can be done in a brazing furnace. Alternative or supplementary solder cladding of the individual components is also conceivable. The heat exchanger is closed in the stacking direction at the end by two end plates 8, which also have bendable holding structures 8a with crenels 6 'at their ends for positive retention of the collector box 5. Depending on the design and depth of the heat exchanger, the holding structures 8a may also be formed as a continuous tab or it may be dispensed with a narrow-side determination of Sammlerkastens. In a second embodiment of the invention (not shown), unlike the first exemplary embodiment, the base 3 is not produced in packaged fashion, but essentially in one piece or as a single bottom section. For this purpose, with otherwise the same shape connecting webs between the segments 3 are left or instead of a complete sawing formed only passages for the flat tubes. These passages can be formed by punching, milling, sawing or other processing measures.

Claims

Patentansprüche claims
Wärmetauscher mit formschlüssig festgelegtem Sammlerkasten, umfassend Heat exchanger with a form-fitting fixed collector box, comprising
einen Boden (3) mit einer randseitigen Haltestruktur (6), eine Mehrzahl von parallel angeordneten Flachrohren (1 ), die jeweils in dem Boden einmünden, und a bottom (3) with a peripheral holding structure (6), a plurality of parallel flat tubes (1), each opening in the bottom, and
einen Sammlerkasten, wobei der Sammlerkasten mittels der Haltestruktur formschlüssig an dem Boden festgelegt ist, a collector box, wherein the collector box is fixed by means of the holding structure in a form-fitting manner to the floor,
dadurch gekennzeichnet, characterized,
dass zumindest ein Abschnitt des Bodens mit der randseitigen Haltestruktur als extrudiertes Profilteil ausgebildet ist. that at least a portion of the bottom is formed with the edge-side support structure as extruded profile part.
Wärmetauscher nach Anspruch 1 , dadurch gekennzeichnet, dass die Haltestruktur eine Mehrzahl von randseitig über dem Boden aufragenden Haltezinnen (6) umfasst. Heat exchanger according to claim 1, characterized in that the holding structure comprises a plurality of edge-rising above the floor retaining tins (6).
Wärmetauscher nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Boden eine Mehrzahl von jeweils als extrudiertes Profilteil ausgebildeten Segmenten (3a, 3b) umfasst, wobei die Segmente (3a, 3b) und die Flachrohre (1 ) abwechselnd aufeinander gestapelt sind. Wärmetauscher nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Abschnitt des Bodens eine Mehrzahl von Durchzügen zur jeweiligen Aufnahme der Flachrohre aufweist. Heat exchanger according to claim 1 or 2, characterized in that the bottom comprises a plurality of each formed as extruded profile part segments (3a, 3b), wherein the segments (3a, 3b) and the flat tubes (1) are stacked alternately. Heat exchanger according to claim 1 or 2, characterized in that the portion of the bottom has a plurality of passages for receiving the respective flat tubes.
Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Flachrohre (1 ) als extrudierte Profilteile ausgebildet sind. Heat exchanger according to one of the preceding claims, characterized in that the flat tubes (1) are formed as extruded profile parts.
Wärmetauscher nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Flachrohre jeweils aus mehreren Bauteilen, insbesondere Stäben und Deckplatten, zusammengesetzt sind. Heat exchanger according to one of claims 1 to 4, characterized in that the flat tubes are each composed of a plurality of components, in particular rods and cover plates.
Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Flachrohre (1 ) in einem schmalseitigen Randbereich einen massiven Querschnitt (1 a) aufweisen, wobei der Querschnitt einen Teil einer Dichtfläche ausbildet. Heat exchanger according to one of the preceding claims, characterized in that the flat tubes (1) in a narrow-side edge region have a solid cross-section (1 a), wherein the cross-section forms part of a sealing surface.
Wärmetauscher nach Anspruch 7, dadurch gekennzeichnet, dass der massive Querschnitt in einer Tiefenrichtung eine Breite (b) zwischen etwa 1 mm und etwa 5 mm, insbesondere zwischen etwa 2 mm und etwa 4 mm aufweist. Heat exchanger according to claim 7, characterized in that the solid cross-section in a depth direction has a width (b) between about 1 mm and about 5 mm, in particular between about 2 mm and about 4 mm.
Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Flachrohre (1 ) einen schmalen Durchmesser (d) zwischen etwa 1 ,5 mm und etwa 10 mm aufweisen. Heat exchanger according to one of the preceding claims, characterized in that the flat tubes (1) have a narrow diameter (d) between about 1, 5 mm and about 10 mm.
Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen dem Sammlerkasten (5) und dem Boden (3) eine ortsfest aufgebrachte Dichtung (4) vorgesehen ist. Heat exchanger according to one of the preceding claims, characterized in that between the collector box (5) and the base (3) a fixedly applied seal (4) is provided.
Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine seitliche Abschlussplatte (8) parallel zu dem Stapel von Flachrohren (1 ) vorgesehen ist, wobei die Abschlussplatte (8) ebenfalls eine Haltestruktur (8a, 6') zur formschlüssigen Halterung des Sammlerkastens (5) aufweist. Heat exchanger according to one of the preceding claims, characterized in that a lateral end plate (8) is provided parallel to the stack of flat tubes (1), wherein the end plate (8) also has a holding structure (8a, 6 ') for the positive retention of the collector box (8). 5).
EP10787384A 2009-12-02 2010-11-30 Heat exchanger having a positively positioned header box Withdrawn EP2507573A1 (en)

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DE200910056509 DE102009056509A1 (en) 2009-12-02 2009-12-02 Heat exchanger with form-fitting fixed collector box
PCT/EP2010/068520 WO2011067247A1 (en) 2009-12-02 2010-11-30 Heat exchanger having a positively positioned header box

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