EP1567820B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP1567820B1
EP1567820B1 EP03779839A EP03779839A EP1567820B1 EP 1567820 B1 EP1567820 B1 EP 1567820B1 EP 03779839 A EP03779839 A EP 03779839A EP 03779839 A EP03779839 A EP 03779839A EP 1567820 B1 EP1567820 B1 EP 1567820B1
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EP
European Patent Office
Prior art keywords
heat exchanger
exchanger according
cover
flat tubes
longitudinal
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.)
Expired - Lifetime
Application number
EP03779839A
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German (de)
French (fr)
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EP1567820A1 (en
Inventor
Uwe FÖRSTER
Kurt Molt
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Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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Publication of EP1567820A1 publication Critical patent/EP1567820A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • 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
    • 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
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • 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
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0214—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions
    • 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
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0073—Gas coolers

Definitions

  • the invention relates to a heat exchanger, in particular a gas cooler for CO2 as a refrigerant, according to the preamble of claim 1.
  • Heat exchangers for air conditioners with R134a as refrigerant consist of a heat exchanger network of flat tubes as well as collector tubes of circular cross-section arranged on both sides of the grid. Such constructions were sufficient in strength for the pressures occurring in a condenser. In modern refrigerants such as CO2, however, occur significantly higher pressures that can no longer be overcome with the conventional Wäremübertragerbau und.
  • the manifold is in two parts, d: h. made of a bottom and a lid consisting of a bent sheet metal strip in the form of, for example, a W and forming with the bottom two approximately circular flow channels.
  • the lid and the bottom as well as the flat tubes inserted into the bottom are soldered together pressure-tight.
  • a longitudinal partition of the lid / bottom acts as a tie rod, since it is soldered to the bottom / lid.
  • This construction of the header tank is inexpensive, since no expensive tools for bending and folding the lid and the floor are needed.
  • the bottom or lid is formed with lobes that engage behind the lid or the bottom edge and thus cause a pre-fixing of the bottom and lid before the soldering process. So it does not require any additional soldering to solder the heat exchanger.
  • the flaps are arranged between the flat tubes.
  • the middle web or the longitudinal dividing wall has notches in the region of the flat tube ends, which allow the refrigerant to flow out of the flat tubes and an overflow of the refrigerant from one longitudinal channel into the other. This results in various possibilities for flow guidance of the refrigerant, in particular in connection with transverse dividing walls.
  • the bottom is concave and has a bulge facing outwardly from the interior of the header tank.
  • the bottom may be convex and have a bulge facing inwardly from the exterior of the header tank. It is also advantageous if on the inside of the edges of the lid or bottom a paragraph is provided as an attachment for the bottom or lid. This results in the assembly of lids and floor a defined contact surface.
  • the number of longitudinal channels of the header tank can be multiplied by having the cross-sectional shape of the cover in a WW shape or a multiple W shape. As a result, two additional longitudinal channels are created in each case, that is, if necessary, a larger volume for the refrigerant is provided. It may also be advantageous to provide two or more flat rows of tubes instead of just one row of flat tubes.
  • Fig. 1 shows a partial view of a condenser or gas cooler 1, as he can preferably find use in an operated with the refrigerant CO2 air conditioning of a motor vehicle.
  • the gas cooler 1 has - as is known - a heat exchanger network, of which only flat tubes 2 are partially shown here, which are taken with their tube ends 2a of a bottom 3 of a header 4. Between the flat tubes 2 are not shown corrugated fins to increase the air-side heat exchange surface.
  • the manifold 4 further consists of a W or. M-shaped lid 5, which engages behind the bottom 3 with lugs or tabs 6 arranged on the edge side.
  • the W- or M-shaped lid is formed such that a longitudinal partition wall is formed such that portions of the lid itself touch and soldered together. Thus, a double-walled partition is formed.
  • Fig. 2 shows a section through the gas cooler 1 according to Fig. 1 , In parallel between two flat tubes 2. It can be clearly seen in this cross section, the W- or M-shape of the bent from a sheet metal strip cover 5, the two outer edge regions 7, 8 and formed as a fold center web 9 which has a in Forming longitudinal direction of the collecting tank 4 extending longitudinal partition and thus the collection box 4 divided into two longitudinal channels 10, 11.
  • the bottom 3 is concave, ie arched outwards.
  • the central web 9 has a web 12, which rests on the entire surface of the bottom 3 and is soldered thereto to form a tie rod.
  • the bottom 3, which projects slightly beyond the narrow sides of the flat tubes 2 in each case, is engaged behind by tabs 6, 13, whereby a fixation of the cover 5 and the bottom 3 is effected.
  • Fig. 3 shows a section along the line III-III in Fig. 2 , wherein the flat tubes 2 are hatched in a simplified representation.
  • the flat tubes 2 have a multi-channel cross-section which is produced by extrusion.
  • the flat tube ends 2a are received in corresponding openings 3a of the bottom 3 and project into the interior of the longitudinal channels 10, 11.
  • the longitudinal partition wall or the central web 9 is provided with arched notches 14, so that its U-shaped gap 15 remains around the flat tube ends 2a around.
  • refrigerant can escape from the flat tubes 2 through this gap 15, and on the other hand, refrigerant can flow over from one longitudinal channel 10 into the other longitudinal channel 11 or vice versa.
  • the gaps 15 thus form overflow openings between the two longitudinal channels 10, 11.
  • Fig. 4 shows a second embodiment of a gas cooler 16 with a W-shaped lid 17 and a flat bottom 18th
  • Fig. 5 shows a longitudinal section through the gas cooler 16 according to Fig. 4
  • the lid 17 has two edges 19, 20, on the inside paragraphs 21, 22 are formed, which serve as an abutment for the bottom 18.
  • the bottom 18 of tabs 23, 24 is engaged behind, projecting from the edges 19, 20.
  • Fig. 6 and Fig. 7 show a third embodiment of a gas cooler 25 with two rows of flat tubes 26, the ends of which are received by a flat bottom 27 of a collecting tank 28.
  • the latter has a bent and folded from a metal strip cover 29, which has the shape of a double W, ie three central webs 30, which divide the collecting box 28 into four longitudinal channels 31.
  • this cover 29 has paragraphs 32 for the installation of the bottom 27, which is also fixed by tabs 33.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Power Steering Mechanism (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

Heat exchanger ( 1 ), in particular a gas condenser for a CO<SUB>2 </SUB>coolant, comprising at least one two-part collector chamber ( 4 ) consisting of a base ( 3 ) and a cover ( 5 ) and a heat exchanger network consisting of flat tubes ( 2 ) and corrugated ribs.

Description

Die Erfindung betrifft einen Wärmeübertrager, insbesondere einen Gaskühler für CO2 als Kältemittel, nach dem Oberbegriff des Patentanspruches 1.The invention relates to a heat exchanger, in particular a gas cooler for CO2 as a refrigerant, according to the preamble of claim 1.

Wärmeübertrager für Klimaanlagen mit R134a als Kältemittel bestehen aus einem Wärmeübertragernetz aus Flachrohren sowie beidseitig des Netze angeordneten Sammelrohren mit kreisförmigen Querschnitt. Derartige Konstruktionen waren bezüglich der Festigkeit ausreichend für die in einem Kondensator auftretenden Drücke. Bei modernen Kältemittel wie beispielsweise CO2 treten jedoch erheblich höhere Drücke auf, die mit den herkömmlichen Wäremübertragerbauweisen nicht mehr zu bewältigen sind. Man hat daher in der WO 98/51983 extrudierte Sammelrohre mit einer erhöhten Wandstärke vorgeschlagen, wobei ein Sammelrohr aus vier nebeneinander angeordneten kreisförmigen Strömungskanälen besteht. Die Herstellung eines solchen extrudierten Sammelrohres ist wegen der dafür benötigten Werkzeuge kostenaufwendig.Heat exchangers for air conditioners with R134a as refrigerant consist of a heat exchanger network of flat tubes as well as collector tubes of circular cross-section arranged on both sides of the grid. Such constructions were sufficient in strength for the pressures occurring in a condenser. In modern refrigerants such as CO2, however, occur significantly higher pressures that can no longer be overcome with the conventional Wäremübertragerbauweisen. One has therefore in the WO 98/51983 extruded manifolds proposed with an increased wall thickness, wherein a manifold consists of four juxtaposed circular flow channels. The production of such an extruded manifold is expensive because of the tools required for it.

Ein anderer Typ von Sammelrohr wurde in der DE-A 199 06 289 vorgeschlagen, wobei ein Sammelrohr aus extrudierten Teilen aufgebaut ist und zwei kreisförmige Strömungskanäle für das Kältemittel CO2 aufweist. Auch bei dieser Bauweise muss wenigstens ein Teil des Sammelrohres durch Extrusion hergestellt werden, was sich ungünstig auf die Herstellkosten des Wärmeübertragers (Gaskühler) auswirkt.Another type of manifold was in the DE-A 199 06 289 proposed, wherein a collecting tube is constructed of extruded parts and has two circular flow channels for the refrigerant CO2. Even with this design must at least a part of the manifold by Extrusion are produced, which adversely affects the manufacturing costs of the heat exchanger (gas cooler).

Es ist daher Aufgabe der vorliegenden Erfindung, einen Wärmeübertrager der eingangs genannte Art mit einem kostengünstigen und druckfesten Sammelrohr zu versehen.It is therefore an object of the present invention to provide a heat exchanger of the type mentioned with a cost and pressure-resistant manifold.

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Patentanspruches 1.The solution to this problem arises from the features of claim 1.

Danach ist das Sammelrohr zweiteilig, d: h. aus einem Boden und einem Deckel hergestellt, der aus einem gebogenen Blechstreifen in Form beispielsweise eines W besteht und mit dem Boden zwei annährend kreisförmige Strömungskanäle bildet. Der Deckel und der Boden sowie auch die in den Boden eingesetzten Flachrohre werden miteinander druckdicht verlötet. Eine Längstrennwand des Deckels/Bodens wirkt dabei als Zuganker, da er mit dem Boden/Deckel verlötet ist. Diese Bauweise des Sammelkastens ist kostengünstig, da keine teuren Werkzeuge für das Biegen bzw. Falten des Deckels und des Bodens benötigt werden.Thereafter, the manifold is in two parts, d: h. made of a bottom and a lid consisting of a bent sheet metal strip in the form of, for example, a W and forming with the bottom two approximately circular flow channels. The lid and the bottom as well as the flat tubes inserted into the bottom are soldered together pressure-tight. A longitudinal partition of the lid / bottom acts as a tie rod, since it is soldered to the bottom / lid. This construction of the header tank is inexpensive, since no expensive tools for bending and folding the lid and the floor are needed.

Der Boden oder der Deckel ist mit Lappen ausgebildet, die den Deckel oder den Boden am Rand hintergreifen und damit eine Vorfixierung von Boden und Deckel vor dem Lötprozess bewirken. Es bedarf also keiner zusätzlichen Lötvorrichtung mehr, um den Wärmeübertrager zu löten. Die Lappen sind zwischen den Flachrohren angeordnet. Der Mittelsteg bzw. die Längstrennwand weist im Bereich der Flachrohrenden Ausklinkungen auf, die ein Ausströmen des Kältemittels aus den Flachrohren und ein Überströmen des Kältemittels von einem Längskanal in den anderen ermöglichen. Dadurch ergeben sich vielfältige Möglichkeiten zur Strömungsführung des Kältemittels, insbesondere in Verbindung mit querveriaufenden Trennwänden. Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen. Eine erhöhte Druckstabilität wird erreicht, wenn der Boden konkav ausgebildet ist und eine Wölbung aufweist, die vom Inneren des Sammelkastens nach außen weist. Der Boden kann konvex ausgebildet sein und eine Wölbung aufweisen, die vom Äußeren des Sammelkastens nach innen weist. Vorteilhaft ist es auch, wenn auf der Innenseite der Ränder von Deckel oder Boden ein Absatz als Anlage für den Boden oder Deckel vorgesehen ist. Dadurch ergibt sich bei der Montage von Deckel und Boden eine definierte Anlagefläche. Schließlich kann die Zahl der Längskanäle des Sammelkastens vervielfacht werden, indem die Querschnittsform des Deckels eine WW-Form oder eine Mehrfach-W-Form aufweist. Dadurch werden jeweils zwei zusätzliche Längskanäle geschaffen, d. h. es wird bedarfsweise ein größeres Volumen für das Kältemittel zur Verfügung gestellt. Dabei kann es ebenfalls von Vorteil sein, statt nur einer Flachrohrreihe zwei oder mehrere Flachrohrreihen vorzusehen.The bottom or lid is formed with lobes that engage behind the lid or the bottom edge and thus cause a pre-fixing of the bottom and lid before the soldering process. So it does not require any additional soldering to solder the heat exchanger. The flaps are arranged between the flat tubes. The middle web or the longitudinal dividing wall has notches in the region of the flat tube ends, which allow the refrigerant to flow out of the flat tubes and an overflow of the refrigerant from one longitudinal channel into the other. This results in various possibilities for flow guidance of the refrigerant, in particular in connection with transverse dividing walls. Advantageous embodiments of the invention will become apparent from the dependent claims. Increased pressure stability is achieved when the bottom is concave and has a bulge facing outwardly from the interior of the header tank. The bottom may be convex and have a bulge facing inwardly from the exterior of the header tank. It is also advantageous if on the inside of the edges of the lid or bottom a paragraph is provided as an attachment for the bottom or lid. This results in the assembly of lids and floor a defined contact surface. Finally, the number of longitudinal channels of the header tank can be multiplied by having the cross-sectional shape of the cover in a WW shape or a multiple W shape. As a result, two additional longitudinal channels are created in each case, that is, if necessary, a larger volume for the refrigerant is provided. It may also be advantageous to provide two or more flat rows of tubes instead of just one row of flat tubes.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im Folgenden näher beschrieben. Es zeigen

Fig. 1
eine perspektivische Teilansicht eines einreihiges Gaskühlers,
Fig. 2
einen Längsschnitt durch den Gaskühler gemäß Fig. 1,
Fig. 3
einen Schnitt entlang der Linie III-III in Fig. 2,
Fig. 4
ein zweites Ausführungsbeispiel eines Gaskühlers mit Absatz im Deckelrand,
Fig. 5
einen Längsschnitt durch den Gaskühler gemäß Fig.4,
Fig. 6
ein drittes Ausführungsbeispiel eines zweireihigen Gaskühlers mit vierkanaligem Sammelkasten und
Fig. 7
eine weitere perspektivische Ansicht des Gaskühlers nach Fig. 6.
Embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it
Fig. 1
a partial perspective view of a single-row gas cooler,
Fig. 2
a longitudinal section through the gas cooler according to Fig. 1 .
Fig. 3
a section along the line III-III in Fig. 2 .
Fig. 4
A second embodiment of a gas cooler with paragraph in the lid edge,
Fig. 5
a longitudinal section through the gas cooler according to Figure 4 .
Fig. 6
a third embodiment of a double-row gas cooler with four-channel collecting tank and
Fig. 7
another perspective view of the gas cooler after Fig. 6 ,

Fig. 1 zeigt eine Teilansicht eines Kondensators bzw. Gaskühlers 1, wie er bevorzugt in einer mit dem Kältemittel CO2 betriebenen Klimaanlage eines Kraftfahrzeuges Verwendung finden kann. Der Gaskühler 1 weist - wie an sich bekannt - ein Wärmeübertragernetz auf, von dem hier nur Flachrohre 2 teilweise dargestellt sind, die mit ihren Rohrenden 2a von einem Boden 3 eines Sammelkastens 4 aufgenommen werden. Zwischen den Flachrohren 2 befinden sich nicht dargestellte Wellrippen zur Vergrößerung der luftseitigen Wärmeaustauschfläche. Das Sammelrohr 4 besteht ferner aus einem W-bzw. M-förmig ausgebildeten Deckel 5, der den Boden 3 mit randseitig angeordneten Laschen bzw. Lappen 6 hintergreift. Fig. 1 shows a partial view of a condenser or gas cooler 1, as he can preferably find use in an operated with the refrigerant CO2 air conditioning of a motor vehicle. The gas cooler 1 has - as is known - a heat exchanger network, of which only flat tubes 2 are partially shown here, which are taken with their tube ends 2a of a bottom 3 of a header 4. Between the flat tubes 2 are not shown corrugated fins to increase the air-side heat exchange surface. The manifold 4 further consists of a W or. M-shaped lid 5, which engages behind the bottom 3 with lugs or tabs 6 arranged on the edge side.

Der W- oder M-förmige Deckel ist derart ausgebildet daß eine Längstrennwand derart gebildet ist, daß sich Bereiche des Deckels sich berühren und miteinander verlötet sind. So wird eine doppelwandige Trennwand gebildet.The W- or M-shaped lid is formed such that a longitudinal partition wall is formed such that portions of the lid itself touch and soldered together. Thus, a double-walled partition is formed.

Fig. 2 zeigt einen Schnitt durch den Gaskühler 1 gemäß Fig. 1, und zwar parallel zwischen zwei Flachrohren 2. Man erkennt in diesem Querschnitt deutlich die W- bzw. M-Form des aus einem Blechstreifen gebogenen Deckels 5, der zwei äußere Randbereiche 7, 8 und einen als Falz ausgebildeten Mittelsteg 9 aufweist, der eine in Längsrichtung des Sammelkastens 4 verlaufende Längstrennwand bildet und damit den Sammelkasten 4 in zwei Längskanäle 10, 11 unterteilt. Der Boden 3 ist konkav ausgebildet, d. h. nach außen gewölbt. Der Mittelsteg 9 weist einen Stegrücken 12 auf, der vollflächig auf dem Boden 3 aufliegt und mit diesem zur Bildung eines zugankers verlötet wird. Der Boden 3, der jeweils etwas über die Schmalseiten der Flachrohre 2 hinausragt, wird in diesen Bereichen von Lappen 6, 13 hintergriffen, womit eine Fixierung von Deckel 5 und Boden 3 bewirkt wird. Fig. 2 shows a section through the gas cooler 1 according to Fig. 1 , In parallel between two flat tubes 2. It can be clearly seen in this cross section, the W- or M-shape of the bent from a sheet metal strip cover 5, the two outer edge regions 7, 8 and formed as a fold center web 9 which has a in Forming longitudinal direction of the collecting tank 4 extending longitudinal partition and thus the collection box 4 divided into two longitudinal channels 10, 11. The bottom 3 is concave, ie arched outwards. The central web 9 has a web 12, which rests on the entire surface of the bottom 3 and is soldered thereto to form a tie rod. The bottom 3, which projects slightly beyond the narrow sides of the flat tubes 2 in each case, is engaged behind by tabs 6, 13, whereby a fixation of the cover 5 and the bottom 3 is effected.

Fig. 3 zeigt einen Schnitt entlang der Linie III-III in Fig. 2, wobei die Flachrohre 2 in vereinfachter Darstellung schraffiert sind. Tatsächlich weisen die Flachrohre 2 einen Mehrkanalquerschnitt auf, der durch Extrudieren hergestellt wird. Die Flachrohrenden 2a sind in entsprechenden Öffnungen 3a des Bodens 3 aufgenommen und ragen in das Innere der Längskanäle 10, 11 hinein. In diesem Bereich - um die Flachrohrenden 2a herum - ist die Längstrennwand bzw. der Mittelsteg 9 mit torbogenförmigen Ausklinkungen 14 versehen, sodass sein U-förmiger Spalt 15 um die Flachrohrenden 2a herum verbleibt. Durch diesen Spalt 15 kann einerseits Kältemittel aus den Flachrohren 2 austreten, und andererseits kann Kältemittel von einem Längskanal 10 in den anderen Längskanal 11 bzw. umgekehrt überströmen. Die Spalte 15 bilden somit Überströmöffnungen zwischen den beide Längskanälen 10, 11. Fig. 3 shows a section along the line III-III in Fig. 2 , wherein the flat tubes 2 are hatched in a simplified representation. In fact, the flat tubes 2 have a multi-channel cross-section which is produced by extrusion. The flat tube ends 2a are received in corresponding openings 3a of the bottom 3 and project into the interior of the longitudinal channels 10, 11. In this area - around the flat tube ends 2a around - the longitudinal partition wall or the central web 9 is provided with arched notches 14, so that its U-shaped gap 15 remains around the flat tube ends 2a around. On the one hand, refrigerant can escape from the flat tubes 2 through this gap 15, and on the other hand, refrigerant can flow over from one longitudinal channel 10 into the other longitudinal channel 11 or vice versa. The gaps 15 thus form overflow openings between the two longitudinal channels 10, 11.

Fig. 4 zeigt ein zweites Ausführungsbeispiel für einen Gaskühler 16 mit einem W-förmig ausgebildeten Deckel 17 und einem ebenen Boden 18.Fig. 5 zeigt einen Längsschnitt durch den Gaskühler 16 gemäß Fig. 4. Der Deckel 17 weist zwei Ränder 19, 20 auf, an deren Innenseite Absätze 21, 22 eingeformt sind, die als Anlage für den Boden 18 dienen. Auf der den Absätzen 21, 22 abgewandten Seite wird der Boden 18 von Lappen 23, 24 hintergriffen, die von den Rändern 19, 20 vorstehen. Fig. 4 shows a second embodiment of a gas cooler 16 with a W-shaped lid 17 and a flat bottom 18th Fig. 5 shows a longitudinal section through the gas cooler 16 according to Fig. 4 , The lid 17 has two edges 19, 20, on the inside paragraphs 21, 22 are formed, which serve as an abutment for the bottom 18. On the side facing away from the paragraphs 21, 22, the bottom 18 of tabs 23, 24 is engaged behind, projecting from the edges 19, 20.

Fig. 6 und Fig. 7 zeigen ein drittes Ausführungsbeispiel eines Gaskühlers 25 mit zwei Reihen von Flachrohren 26, deren Enden von einem ebenen Boden 27 eines Sammelkastens 28 aufgenommen werden. Letzterer weist einen aus einem Blechstreifens gebogenen und gefalteten Deckel 29 auf, der die Form eines zweifachen W, d. h. drei Mittelstege 30 aufweist, die den Sammelkasten 28 in vier Längskanäle 31 unterteilen. Wie oben bereits beschrieben, weist auch dieser Deckel 29 Absätze 32 für die Anlage des Bodens 27 auf, der ebenfalls durch Lappen 33 fixiert wird. Durch diese mehrkantige Ausführung wird ein größeres Volumen für den Sammelkasten 28 gebildet und gleichzeitig die für die hohen Innendrücke erforderliche Druckstabilität gesorgt. Fig. 6 and Fig. 7 show a third embodiment of a gas cooler 25 with two rows of flat tubes 26, the ends of which are received by a flat bottom 27 of a collecting tank 28. The latter has a bent and folded from a metal strip cover 29, which has the shape of a double W, ie three central webs 30, which divide the collecting box 28 into four longitudinal channels 31. As already described above, this cover 29 has paragraphs 32 for the installation of the bottom 27, which is also fixed by tabs 33. By this polygonal design, a larger volume for the collecting box 28 is formed and at the same time provided the required for the high internal pressures pressure stability.

Claims (13)

  1. Heat exchanger (1, 16, 25) with at least one two-part collector box (4, 28) and with a heat exchanger network preferably consisting of flat tubes (2, 26) and corrugated fins, the at least one collection box (4, 28) consisting of a bottom (3, 18, 27) and a cover (5, 17, 29), the bottom (3, 18, 27) having openings to receive ends (2a) of the flat tubes (2, 26), the bottom (3, 18, 27) being connected to the cover (5, 17, 29) in a fluid-tight manner, such that the collector box (4, 28) has at least one longitudinal partition (9, 30) so as to form at least two longitudinal channels (10, 11, 31), the at least one longitudinal partition (9, 30) being soldered to the bottom (3, 18, 27) and the at least one longitudinal partition (9, 30) having recesses or apertures (14) into which the ends (2a) of flat tubes engage or project at least partially, or into which no flat tube ends project, characterised in that the cover (5, 17, 29) is designed in such manner that the at least one longitudinal partition (9, 30) is formed by two substantially parallel areas of the cover (5, 17, 29), these two substantially parallel areas being in contact and soldered to one another, such that the at least one partition (9, 30) is formed as a bent or folded sheet wall and the bottom (3, 18, 27) or the cover (5, 17, 29) is formed with tabs (6, 13, 23, 24, 33) which engage behind the cover (5, 17, 29) or the bottom (3, 18, 27) at the edge, the said tabs (6, 13, 23, 24, 33) being arranged between the flat tubes (2, 26).
  2. Heat exchanger according to Claim 1, characterised in that a longitudinal partition (9, 30) is made as a fold.
  3. Heat exchanger according to either of the preceding claims, characterised in that the cover (5, 17, 29) has one, two, three or a plurality of partitions (9, 30).
  4. Heat exchanger according to any of the preceding claims, characterised in that the bottom (3) is of concave shape with a curvature facing from the inside of the collector box (4) towards the outside.
  5. Heat exchanger according to any of the preceding Claims 1 to 3, characterised in that the bottom (3) is of convex shape with a curvature facing from the outside of the collector box (4) towards the inside.
  6. Heat exchanger according to any of the preceding claims, characterised in that free areas such as gaps (15) are left between the indentations (14) and the flat tube ends (2a).
  7. Heat exchanger according to any of the preceding claims, characterised in that the said free areas are in the form of U-shaped gaps (15).
  8. Heat exchanger according to any of the preceding claims, characterised in that the free areas are designed partially as abutments for the tubes (2, 26).
  9. Heat exchanger according to any of the preceding claims, characterised in that the edges (19, 20) of the cover (17, 29) or the bottom have on the inside steps (21, 22, 32) which extend longitudinally, against which the bottom (18, 27) or the cover rest.
  10. Heat exchanger according to any of the preceding claims, characterised in that the cover (29) has additional longitudinal partitions (30) for forming further longitudinal channels (31).
  11. Heat exchanger according to Claim 10, characterised in that the additional partitions or individual partitions have no recesses or indentations.
  12. Heat exchanger according to Claim 10, characterised in that the additional partitions or individual partitions have recesses or indentations which, however, do not serve for fluid overflow.
  13. Heat exchanger according to any of the preceding claims, characterised in that the flat tubes (26) are arranged in two or more rows.
EP03779839A 2002-11-27 2003-11-03 Heat exchanger Expired - Lifetime EP1567820B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10255487A DE10255487A1 (en) 2002-11-27 2002-11-27 Heat exchanger
DE10255487 2002-11-27
PCT/EP2003/012227 WO2004048875A1 (en) 2002-11-27 2003-11-03 Heat exchanger

Publications (2)

Publication Number Publication Date
EP1567820A1 EP1567820A1 (en) 2005-08-31
EP1567820B1 true EP1567820B1 (en) 2008-04-23

Family

ID=32308795

Family Applications (1)

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EP03779839A Expired - Lifetime EP1567820B1 (en) 2002-11-27 2003-11-03 Heat exchanger

Country Status (6)

Country Link
US (1) US7121332B2 (en)
EP (1) EP1567820B1 (en)
AT (1) ATE393369T1 (en)
AU (1) AU2003287989A1 (en)
DE (2) DE10255487A1 (en)
WO (1) WO2004048875A1 (en)

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Also Published As

Publication number Publication date
US7121332B2 (en) 2006-10-17
EP1567820A1 (en) 2005-08-31
DE10255487A1 (en) 2004-06-09
ATE393369T1 (en) 2008-05-15
US20050230093A1 (en) 2005-10-20
AU2003287989A1 (en) 2004-06-18
DE50309713D1 (en) 2008-06-05
WO2004048875A1 (en) 2004-06-10

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