EP1567820A1 - Heat exchanger - Google Patents

Heat exchanger

Info

Publication number
EP1567820A1
EP1567820A1 EP03779839A EP03779839A EP1567820A1 EP 1567820 A1 EP1567820 A1 EP 1567820A1 EP 03779839 A EP03779839 A EP 03779839A EP 03779839 A EP03779839 A EP 03779839A EP 1567820 A1 EP1567820 A1 EP 1567820A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
exchanger according
base
lid
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.)
Granted
Application number
EP03779839A
Other languages
German (de)
French (fr)
Other versions
EP1567820B1 (en
Inventor
Uwe FÖRSTER
Kurt Molt
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 Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1567820A1 publication Critical patent/EP1567820A1/en
Application granted granted Critical
Publication of EP1567820B1 publication Critical patent/EP1567820B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 conditioning systems with R134a as the refrigerant consist of a heat exchanger network made of flat tubes and collecting tubes with a circular cross section arranged on both sides of the network. Such constructions were sufficient in strength for the pressures occurring in a condenser. With modern refrigerants such as CO2, however, there are considerably higher pressures that are no longer manageable with conventional heat exchanger designs. Extruded manifolds with increased wall thickness have therefore been proposed in WO 98/51983, a manifold consisting of four circular flow channels arranged next to one another. The production of such an extruded manifold is expensive because of the tools required for it.
  • header pipe Another type of header pipe was proposed in DE-A 199 06 289, a header pipe being constructed from extruded parts and having two circular flow channels for the refrigerant C02. With this construction too, at least part of the collecting pipe must pass through
  • the manifold is in two parts, i.e. made of a bottom and a lid, which consists of a bent sheet metal strip in the form of, for example, a W and forms two approximately circular flow channels with the bottom.
  • the lid and the base as well as the flat tubes inserted in the base 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.
  • the edges of the cover, which overlap the base have individual tabs or tabs, which overlap the base in its edge region and thus cause the base and cover to be pre-fixed before the soldering process. There is therefore no longer any need for an additional soldering device to solder the heat exchanger.
  • An increased pressure stability is achieved if the bottom is concave.
  • the central web or the longitudinal partition wall has notches in the area of the flat tube ends, which allow the refrigerant to flow out of the flat tubes and the refrigerant to flow from one longitudinal channel into the other. As a result, there are diverse possibilities for flow control of the refrigerant, in particular in connection with transverse dividing walls.
  • the number of longitudinal channels of the collecting tank can be multiplied by the cross-sectional shape of the cover having a WW shape or a multiple W shape. This creates two additional longitudinal channels, ie a larger volume is made available for the refrigerant if necessary. It may also be advantageous to provide two or more rows of flat tubes instead of just one row of flat tubes.
  • FIG. 1 shows a perspective partial view of a single-row gas cooler
  • FIG. 2 shows a longitudinal section through the gas cooler according to FIG. 1
  • FIG. 3 shows a section along the line III-III in FIG. 2
  • FIG. 4 shows a second exemplary embodiment of a gas cooler with a shoulder in FIG 5, a longitudinal section through the gas cooler according to FIG. 4,
  • FIG. 6 a third exemplary embodiment of a double-row gas cooler with a four-channel collecting box, and
  • FIG. 7 a further perspective view of the gas cooler according to FIG. 6.
  • the gas cooler 1 shows a partial view of a condenser or gas cooler 1, as can preferably be used in an air conditioning system of a motor vehicle operated with the refrigerant CO2.
  • the gas cooler 1 has a heat exchanger network, of which only flat tubes 2 are shown here in part, the tube ends 2a of which are received by a base 3 of a collecting tank 4. Between the flat tubes 2 are not shown corrugated fins to enlarge the air-side heat exchange surface.
  • the collecting tube 4 also consists of a W or M-shaped cover 5, which engages behind the bottom 3 with tabs or tabs 6 arranged on the edge.
  • the W- or M-shaped cover is formed so 'that a longitudinal partition is formed such that areas of the lid touch and are soldered together. This creates a double-walled partition.
  • the bottom can also show the partition.
  • FIG. 2 shows a section through the gas cooler 1 according to FIG. 1, namely in parallel between two flat tubes 2.
  • the W or M shape of the cover 5 which is bent from a sheet metal strip and which has two outer edge regions 7 , 8 and has a central web 9 which is designed as a fold and which extends in the longitudinal direction of the collecting tank
  • the bottom 3 is concave, ie curved outwards.
  • the central web 9 has a web back 12, the entire surface resting on the bottom 3 and is soldered thereto to form a 'tension rod.
  • FIG. 3 shows a section along the line III-III in FIG. 2, the flat tubes 2 being 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 in the base 3 and protrude into the interior of the longitudinal channels -10, 11. In this area - around the flat tube ends 2a - is the
  • 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 having a W-shaped cover '17 and a flat bottom 18.
  • FIG. 5 shows a longitudinal section through the gas cooler 16 according to FIG. 4.
  • the cover 17 has two edges 19, 20, on the inside of which shoulders 21, 22 are formed, which serve as an attachment for the bottom 18.
  • the bottom 18 is gripped by tabs 23, 24 which protrude from the edges 19, 20.
  • FIGS. 6 and 7 show a third exemplary 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 box 28.
  • the latter has a lid 29 which is bent and folded from a sheet metal strip and which has the shape of a double W, i. H. has three central webs 30 which divide the collecting box 28 into four longitudinal channels 31.
  • this cover 29 also has shoulders 32 for the contact of the base 27, which is also fixed by rags 33.
  • This multichannel design creates a larger volume for the header tank 28 and at the same time ensures the pressure stability required for the high internal pressures.

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)
  • 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

Wärmeübertrager Heat exchanger
Die Erfindung betrifft einen Wärmeübertrager, insbesondere einen Gas- kühler 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 Netzes 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 conditioning systems with R134a as the refrigerant consist of a heat exchanger network made of flat tubes and collecting tubes with a circular cross section arranged on both sides of the network. Such constructions were sufficient in strength for the pressures occurring in a condenser. With modern refrigerants such as CO2, however, there are considerably higher pressures that are no longer manageable with conventional heat exchanger designs. Extruded manifolds with increased wall thickness have therefore been proposed in WO 98/51983, a manifold consisting of four circular flow channels arranged next to one another. 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 C02 aufweist. Auch bei dieser Bauweise muss wenigstens ein Teil des Sammelrohres durchAnother type of header pipe was proposed in DE-A 199 06 289, a header pipe being constructed from extruded parts and having two circular flow channels for the refrigerant C02. With this construction too, at least part of the collecting pipe must pass through
BESTATIGUNGSKOPIE Extrusion hergestellt werden, was sich ungünstig auf die Herstellkosten des Wärmeübertragers (Gaskühler) auswirkt.BESTATIGUNGSKOPIE Extrusion are produced, which has an adverse effect on the manufacturing costs of the heat exchanger (gas cooler).
Es ist daher Aufgabe der vorliegenden Erfindung, einen Wärmeübertrager der eingangs genannten Art mit einem kostengünstigen und druekfesten Sammelrohr zu versehen.It is therefore an object of the present invention to provide a heat exchanger of the type mentioned at the outset with an inexpensive and pressure-resistant manifold.
Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Patentanspruches 1. . • ; • The solution to this problem results from the features of claim 1.. •; •
Danach ist das Sammelrohr zweiteilig, d: h. aus einem Böden 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.After that, the manifold is in two parts, i.e. made of a bottom and a lid, which consists of a bent sheet metal strip in the form of, for example, a W and forms two approximately circular flow channels with the bottom. The lid and the base as well as the flat tubes inserted in the base 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 design of the collecting tank is inexpensive because no expensive tools' for bending or folding the cover and base are needed.
Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen. Beispielsweise weisen die Ränder des Deckels, die den Boden übergreifen, einzelne Lappen oder Laschen auf, die den Boden in seinem Randbereich übergreifen und damit eine Vorfixierung von Boden und Deckel vor dem Lötprozess bewirken. Es bedarf also keiner zusätzlichen Lötvorrichtung mehr, um den Wärmeübertrager zu löten. Eine erhöhte Druckstabilität wird erreicht, wenn der Boden konkav ausgebildet ist. Vorteilhaft ist es ferner, dass der Mittelsteg bzw. die Längstrennwand im Bereich der Flachrohrenden Ausklinkungen aufweist, die ein Ausströmen des Kälte- mittels 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 querverlaufenden Trennwänden. Vorteilhaft ist es auch, wenn auf der Innenseite der Deckelränder ein Absatz als Anlage für den Boden 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.Advantageous embodiments of the invention result from the subclaims. For example, the edges of the cover, which overlap the base, have individual tabs or tabs, which overlap the base in its edge region and thus cause the base and cover to be pre-fixed before the soldering process. There is therefore no longer any need for an additional soldering device to solder the heat exchanger. An increased pressure stability is achieved if the bottom is concave. It is also advantageous that the central web or the longitudinal partition wall has notches in the area of the flat tube ends, which allow the refrigerant to flow out of the flat tubes and the refrigerant to flow from one longitudinal channel into the other. As a result, there are diverse possibilities for flow control of the refrigerant, in particular in connection with transverse dividing walls. It is also advantageous if a shoulder is provided as an attachment for the floor on the inside of the lid edges. This results in the assembly of the cover and floor a defined contact surface. Finally, the number of longitudinal channels of the collecting tank can be multiplied by the cross-sectional shape of the cover having a WW shape or a multiple W shape. This creates two additional longitudinal channels, ie a larger volume is made available for the refrigerant if necessary. It may also be advantageous to provide two or more rows of flat tubes instead of just one row of flat tubes.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im Folgenden näher beschrieben. Es zeigenExemplary embodiments of the invention are shown in the drawings and are described in more detail below. Show it
Fig. 1 eine perspektivische Teilansicht eines einreihigen Gaskühlers, Fig. 2 einen Längsschnitt durch den Gaskühler gemäß Fig. 1 , Fig. 3 einen Schnitt entlang der Linie lll-lll 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. 6.1 shows a perspective partial view of a single-row gas cooler, FIG. 2 shows a longitudinal section through the gas cooler according to FIG. 1, FIG. 3 shows a section along the line III-III in FIG. 2, FIG. 4 shows a second exemplary embodiment of a gas cooler with a shoulder in FIG 5, a longitudinal section through the gas cooler according to FIG. 4, FIG. 6 a third exemplary embodiment of a double-row gas cooler with a four-channel collecting box, and FIG. 7 a further perspective view of the gas cooler according to 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.1 shows a partial view of a condenser or gas cooler 1, as can preferably be used in an air conditioning system of a motor vehicle operated with the refrigerant CO2. As is known per se, the gas cooler 1 has a heat exchanger network, of which only flat tubes 2 are shown here in part, the tube ends 2a of which are received by a base 3 of a collecting tank 4. Between the flat tubes 2 are not shown corrugated fins to enlarge the air-side heat exchange surface. The collecting tube 4 also consists of a W or M-shaped cover 5, which engages behind the bottom 3 with tabs or tabs 6 arranged on the edge.
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 cover is formed so 'that a longitudinal partition is formed such that areas of the lid touch and are soldered together. This creates a double-walled partition.
Statt des Deckels kann auch der Boden die Trennwand ausweisen.Instead of the lid, the bottom can also show the partition.
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 ausge- bildeten Mittelsteg 9 aufweist, der eine in Längsrichtung des SammelkastensFIG. 2 shows a section through the gas cooler 1 according to FIG. 1, namely in parallel between two flat tubes 2. One can clearly see in this cross section the W or M shape of the cover 5 which is bent from a sheet metal strip and which has two outer edge regions 7 , 8 and has a central web 9 which is designed as a fold and which extends in the longitudinal direction of the collecting tank
4 verlaufende Längstrennwand bildet und damit den Sammelkasten 4 in zwei Längskanäle 10, 1 1 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 6,4 extending longitudinal partition and thus divides the collecting box 4 into two longitudinal channels 10, 1 1. The bottom 3 is concave, ie curved outwards. The central web 9 has a web back 12, the entire surface resting on the bottom 3 and is soldered thereto to form a 'tension rod. The bottom 3, which in each case protrudes somewhat beyond the narrow sides of the flat tubes 2, is
13 hintergriffen, womit eine Fixierung von Deckel 5 und Boden 3 bewirkt wird.13 engaged, whereby a fixation of the lid 5 and bottom 3 is effected.
Fig. 3 zeigt einen Schnitt entlang der Linie lll-lll 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 dieFIG. 3 shows a section along the line III-III in FIG. 2, the flat tubes 2 being 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 in the base 3 and protrude into the interior of the longitudinal channels -10, 11. In this area - around the flat tube ends 2a - is the
Längstrennwand bzw. der Mittelsteg 9 mit torbogenförmigen AusklinkungenLongitudinal partition or the central web 9 with arched notches
14 versehen, sodass sein U-förmiger Spalt 15 um die Flachrohrenden 2ä 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.14 provided so that its U-shaped gap 15 remains around the flat tube ends 2a. On the one hand, refrigerant can escape from the flat tubes 2 through this gap 15, and on the other hand, refrigerant can flow from one longitudinal channel 10 into the other longitudinal channel 11 or vice versa.
Die Spalte 15 bilden somit Überströmöffnungen zwischen den beiden Längskanälen 10, 11.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 having a W-shaped cover '17 and a flat bottom 18. FIG. 5 shows a longitudinal section through the gas cooler 16 according to FIG. 4. The cover 17 has two edges 19, 20, on the inside of which shoulders 21, 22 are formed, which serve as an attachment for the bottom 18. On the side facing away from paragraphs 21, 22, the bottom 18 is gripped by tabs 23, 24 which protrude 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 Blechstreifen 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 mehrkanalige Ausführung wird ein größeres Volumen für den Sammelkasten 28 gebildet und gleichzeitig die für die hohen Innendrücke erforderliche Druckstabilität gesorgt. 6 and 7 show a third exemplary 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 box 28. The latter has a lid 29 which is bent and folded from a sheet metal strip and which has the shape of a double W, i. H. has three central webs 30 which divide the collecting box 28 into four longitudinal channels 31. As already described above, this cover 29 also has shoulders 32 for the contact of the base 27, which is also fixed by rags 33. This multichannel design creates a larger volume for the header tank 28 and at the same time ensures the pressure stability required for the high internal pressures.

Claims

P a t e n t a n s p r ü c h eP a t e n t a n s r ü c h e
'1. Wärmeübertrager mit mindestens einem zweiteiligen Sammelkästen und einem vorzugsweise aus Flachrohren und Wellrippen bestehenden Wärmeübertragernetz, wobei der zumindest eine Sammelkasten aus einem Boden und einem Deckel besteht und der Boden Öffnungen zur Aufnahme von Enden der Flachrohre ausweist der Boden mit dem Deckel fluiddicht verbunden ist und der Sammel- ' 1. Heat exchanger with at least one two-part collecting box and a heat exchanger network preferably consisting of flat tubes and corrugated fins, the at least one collecting box consisting of a base and a lid and the base having openings for receiving the ends of the flat tubes, the base being connected to the lid in a fluid-tight manner and the collecting
. kästen zumindest eine Längstrennwand zur Bildung von zumindest zwei Längskanälen aufweist, wobei der Deckel derart ausgebildet ist, daß die Längstrennwand durch zwei im wesentlichen parallel ausgerichtete Bereiche des Deckels gebildet ist.. boxes has at least one longitudinal partition to form at least two longitudinal channels, the lid being designed in such a way that the longitudinal partition is formed by two essentially parallel areas of the lid.
2. Wärmeübertrager nach Anspruch 1 , dadurch gekennzeichnet, daß die beiden im wesentlichen parallel ausgerichtete Bereiche sich berühren.2. Heat exchanger according to claim 1, characterized in that the two essentially parallel areas touch each other.
3. Wärmeübertrager nach Anspruch 1 oder-2, dadurch gekennzeichnet, daß die beiden im wesentlichen parallel ausgerichtete Bereiche miteinander verbunden, wie beispielsweise verlötet, sind.3. Heat exchanger according to claim 1 or 2, characterized in that the two essentially parallel areas are connected to one another, such as soldered.
4. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Längstrennwand als umgebogene o oder gefaltete Blechwand ausgebildet ist.4. Heat exchanger according to one of the preceding claims, characterized in that a longitudinal partition is designed as a bent or folded sheet metal wall.
5. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Längstrennwand als Falz ausgebildet ist. 5 5. Heat exchanger according to one of the preceding claims, characterized in that a longitudinal partition is designed as a fold. 5
6. Wärmeübertrager nach einem der vorhergehenden- Ansprüche, dadurch gekennzeichnet, dass der Deckel eine, zwei, drei oder eine Mehrzahl von Trennwänden aufweist.6. Heat exchanger according to one of the preceding claims, characterized in that the cover has one, two, three or a plurality of partitions.
7. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Deckel den Boden an Rand übergreift.7. Heat exchanger according to one of the preceding claims, characterized in that the cover overlaps the edge of the base.
8. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Boden den Deckel an Rand übergreift.8. Heat exchanger according to one of the preceding claims, characterized in that the base overlaps the edge of the lid.
9. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Boden konkav ausgebildet ist und eine Wölbung aufweist, die vom Inneren des Sammelkastens nach außen weist.' 9. Heat exchanger according to one of the preceding claims, characterized in that the base is concave and has a curvature which points outwards from the inside of the collecting box. '
10. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Boden konvex ausgebildet ist und eine Wölbung aufweist, die vom Äußeren des Sammelkastens nach innen weist.10. Heat exchanger according to one of the preceding claims, characterized in that the base is convex and has a curvature that points inwards from the outside of the collecting box.
11. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Deckel oder der Boden an zumindest einem Rand, vorteilhaft an zwei Rändern, den Boden oder den Deckel hintergreift.11. Heat exchanger according to one of the preceding claims, characterized in that the cover or the base engages behind the base or the cover on at least one edge, advantageously on two edges.
12. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Boden oder der Deckel mit Lappen ausgebildet ist, die den Deckel - oder den Boden am Rand hintergreifen.12. Heat exchanger according to one of the preceding claims, characterized in that the base or the lid is designed with tabs which engage behind the lid or the base at the edge.
13. Wärmeübertrager nach Anspruch 12, dadurch gekennzeichnet, dass die Lappen zwischen den Flachrohren angeordnet sind. 13. Heat exchanger according to claim 12, characterized in that the tabs are arranged between the flat tubes.
4. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zumindest eine Längstrennwand Ausnehmungen oder Ausklinkungen aufweist.4. Heat exchanger according to one of the preceding claims, characterized in that the at least one longitudinal partition has recesses or notches.
15. Wärmeübertrager nach Anspruch 14, dadurch gekennzeichnet, daß die Trennwand Ausnehmungen oder Ausklinkungen aufweist, in welche Flachrohrenden zumindest teilweise eingreifen oder hineinragen.15. Heat exchanger according to claim 14, characterized in that the partition has recesses or notches into which flat tube ends at least partially engage or protrude.
16. Wärmeübertrager nach Anspruch 14, dadurch gekennzeichnet, daß die Trennwand Ausnehmungen oder Ausklinkungen aufweist, in welche keine Flachrohrenden hineinragen.16. Heat exchanger according to claim 14, characterized in that the partition has recesses or notches into which no flat tube ends protrude.
17. Wärmeübertrager nach Anspruch 15, dadurch gekennzeichnet, dass zwischen den Ausklinkungen und den Flachrohrenden freie Bereiche wie beispielsweise Spalte belassen sind.17. Heat exchanger according to claim 15, characterized in that free areas such as gaps are left between the notches and the flat tube ends.
18. Wärmeübertrager nach Anspruch 17, dadurch gekennzeichnet, daß die freien Bereiche als u-förmige Spalte ausgebildet sind.18. Heat exchanger according to claim 17, characterized in that the free areas are designed as a U-shaped column.
19. Wärmeübertrager nach Anspruch 17, dadurch gekennzeichnet, daß die freien Bereiche teilweise als Anschläge für die Rohre ausgebildet sind.19. Heat exchanger according to claim 17, characterized in that the free areas are partially designed as stops for the pipes.
20. Wärmeübertrager nach einem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Ränder von Deckel oder Boden auf der Innenseite in Längsrichtung verlaufende Absätze aufweisen, an welchen der Boden oder Deckel anliegt.20. Heat exchanger according to a preceding claim, characterized in that the edges of the lid or base have shoulders on the inside running in the longitudinal direction, against which the base or lid rests.
21. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Deckel weitere Längstrennwände zur Bildung von weiteren Längskanälen aufweist.21. Heat exchanger according to one of the preceding claims, characterized in that the cover has further longitudinal partitions to form further longitudinal channels.
22. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die weiteren Längstrenπwände oder einzelne Längstrennwände keine Ausnehmungen oder Ausklinkungen aufweisen.22. Heat exchanger according to one of the preceding claims, characterized in that the further longitudinal separating walls or Individual longitudinal partitions do not have any recesses or notches.
23. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die weiteren Längstrennwände oder einzelne Längstrennwände Ausnehmungen oder Ausklinkungen aufweisen, die jedoch nicht der Überströmung eines Fluids dienen.23. Heat exchanger according to one of the preceding claims, characterized in that the further longitudinal partitions or individual longitudinal partitions have recesses or notches, which, however, do not serve to allow a fluid to flow over them.
24. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Flachrohre (26) zwei- oder mehrreihig angeordnet sind. 24. Heat exchanger according to one of the preceding claims, characterized 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 true EP1567820A1 (en) 2005-08-31
EP1567820B1 EP1567820B1 (en) 2008-04-23

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

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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
DE50309713D1 (en) 2008-06-05
ATE393369T1 (en) 2008-05-15
AU2003287989A1 (en) 2004-06-18
US7121332B2 (en) 2006-10-17
US20050230093A1 (en) 2005-10-20
WO2004048875A1 (en) 2004-06-10
DE10255487A1 (en) 2004-06-09
EP1567820B1 (en) 2008-04-23

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