EP1764571A1 - Heat exchanger, especially radiator, for air conditioning system - Google Patents

Heat exchanger, especially radiator, for air conditioning system Download PDF

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Publication number
EP1764571A1
EP1764571A1 EP06015635A EP06015635A EP1764571A1 EP 1764571 A1 EP1764571 A1 EP 1764571A1 EP 06015635 A EP06015635 A EP 06015635A EP 06015635 A EP06015635 A EP 06015635A EP 1764571 A1 EP1764571 A1 EP 1764571A1
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EP
European Patent Office
Prior art keywords
heat exchanger
flat tubes
flat
indentations
exchanger according
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Granted
Application number
EP06015635A
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German (de)
French (fr)
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EP1764571B1 (en
Inventor
Matthias Dipl.-Ing. Traub
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Mahle Behr GmbH and Co KG
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Behr GmbH and Co KG
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Publication of EP1764571A1 publication Critical patent/EP1764571A1/en
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    • 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
    • F28F3/042—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 local deformations of the element
    • F28F3/044—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 local deformations of the element the deformations being pontual, e.g. dimples
    • 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

Definitions

  • the invention relates to a heat exchanger, in particular a radiator, for an air conditioner with flat tubes, which are flowed through in a direction of coolant and between which louvers are arranged, which are flowed around by air or other medium.
  • a heat exchanger for motor vehicles which comprises a plurality of flat tubes, which are traversed by a liquid cooling medium. Between the flat tubes are arranged by ambient air or other media acted upon corrugated fins, wherein the flat tubes have on at least one of its flat sides inwardly directed indentations.
  • Conventional heat exchangers, in particular radiators, for air conditioning systems are usually equipped with deflections, so that they are flowed through several times.
  • simply through-flow heat exchangers are to be preferred, since due to the simple flow through a natural stratification occurs.
  • the heating capacity in simply flowed through heat exchangers, in particular radiators, compared to heat exchangers with one or more deflections of the coolant at the same tube geometry rather low.
  • the object of the invention is to provide a heat exchanger, in particular a radiator, for an air conditioner, according to the preamble of claim 1, which has a higher heat output than conventional simply flowed through the heat exchanger, in particular radiator.
  • the object is in a heat exchanger, in particular a radiator, for an air conditioner with flat tubes, which are flowed through in a direction of coolant and between which louvers are arranged, which are flowed around by air or other medium, achieved in that the flat tubes a light Inner tube width of more than 1.2 mm and have indentations that extend into the interior of the flat tubes.
  • the present invention provides a compromise between the requirement for high heat output and the goal of keeping the coolant side pressure drop as small as possible.
  • the relatively large inner diameter of the pipe leads to a relatively small pressure drop on the coolant side, but also to lower heat output.
  • the partial imprints which are also referred to as winglets.
  • the indentations improve the heat transfer on the coolant side, whereby the coolant-side pressure drop does not rise or only moderately increases with a suitable geometry of the impressions.
  • a preferred embodiment of the heat exchanger is characterized in that the indentations have a depth of 0.1 to 0.4 mm. These values have proven to be particularly advantageous in the context of the present invention.
  • the flat tubes have a clear inner tube width of 1.3 to 1.5 mm.
  • the flat tubes have a light Pipe width of 1.38 mm. In this case, customary manufacturing tolerances must be taken into account.
  • a further preferred embodiment of the heat exchanger is characterized in that the indentations are formed by elongated depressions, which are provided on each flat side of the flat tubes.
  • a further preferred embodiment of the heat exchanger is characterized in that the indentations are formed by elongated depressions, which are respectively provided on both flat sides of the flat tubes.
  • Another preferred embodiment of the heat exchanger is characterized in that the indentations are formed knob-like. Particularly advantageous is a combination of elongated with knob-like impressions on both flat sides of the flat tubes has proven.
  • FIG. 1 shows a heat exchanger 1 in plan view.
  • the heat exchanger 1 is a radiator of an air conditioning system of a motor vehicle.
  • the heat exchanger 1 comprises a lower collection box 4, which is equipped with an inlet connection 5, through which, as indicated by an arrow 6, coolant enters the heat exchanger 1.
  • the heat exchanger 1 has an upper collecting box 7, which is equipped with an outlet nozzle 8, through which, as indicated by an arrow 10, the coolant exits the heat exchanger 1.
  • the two header boxes 4, 7 are connected by a plurality of flat tubes, which are simply flowed through in the direction of an arrow 14 by the coolant. Between each two flat tubes, a gap is provided in which an air guide, in particular a corrugated fin is arranged.
  • the louvers between the flat tubes are traversed perpendicularly to the plane of the drawing of a medium, in particular of ambient air.
  • FIG. 2 shows in perspective a section of a flat tube 20 of the heat exchanger shown in FIG.
  • the flat tube 20 has in the middle a longitudinally extending bead 22, which serves to give the flat tube 20 a greater rigidity. Because of the bead 22, the flat tube 20 is also referred to as a bead tube.
  • the flat tube 20 comprises an upper flat side 24 and a lower flat side 25.
  • the two flat sides 24, 25 are provided with a plurality of elongated depressions 26 to 29.
  • flat tubes with the outside dimensions 26.0 ⁇ 1.9 ⁇ 0.26 mm 3 are mainly used. These flat tubes have a clear inner tube width of 1.38 mm. The height of the impressions is in the range of 0.1 to 0.4 mm. Due to the height of the indentations, the heat transfer on the coolant side can be varied until a desired performance result is achieved.
  • the flat tube 31 includes a plurality of indentations 41, 42, which are each arranged in pairs V-shaped to each other. In the invisible flat side of the flat tube 31 also impressions 44, 45 are formed, which complement with the indentations 41, 42 to a rhombus.
  • the flat tubes 32 and 33 show further V-shaped or diamond-shaped arrangements of oblong indentations.
  • the flat tubes 34 and 36 show X-shaped arrangements of impressions with the two flat sides of the respective flat tube.
  • the flat tube 35 in turn has V-shaped impressions.
  • the flat tube 37 is formed identically to the flat tube 31.
  • the flat tubes 38 and 39 in addition to elongated indentations or depressions, as shown in FIGS. 31 and 37, also have knob-like embossments 51 to 54.
  • the flat tubes 31 to 39 are each flowed through from bottom to top.

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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)

Abstract

Heat exchanger comprises flat tubes (20) having a light inner width of more than 1.2 mm and impressions (26-29) extending into the inner chamber of the flat tubes. Preferred Features: The impressions have a depth of 0.1-0.4 mm. The flat tubes have a width of 1.3-1.5 mm. The impressions are formed by longitudinal recesses arranged on both sides of the flat tubes.

Description

Die Erfindung betrifft einen Wärmeübertrager, insbesondere einen Heizkörper, für eine Klimaanlage mit Flachrohren, die in einer Richtung von Kühlmittel durchströmt werden und zwischen denen Luftleiteinrichtungen angeordnet sind, die von Luft oder einem anderen Medium umströmt werden.The invention relates to a heat exchanger, in particular a radiator, for an air conditioner with flat tubes, which are flowed through in a direction of coolant and between which louvers are arranged, which are flowed around by air or other medium.

Aus der deutschen Offenlegungsschrift DE 101 27 084 A1 ist ein Wärmeübertrager für Kraftfahrzeuge bekannt, der eine Vielzahl von Flachrohren umfasst, die von einem flüssigen Kühlmedium durchströmbar sind. Zwischen den Flachrohren sind von Umgebungsluft oder anderen Medien beaufschlagbare Wellrippen angeordnet, wobei die Flachrohre auf wenigstens einer ihrer Flachseiten nach innen gerichtete Einprägungen aufweisen. Herkömmliche Wärmeübertrager, insbesondere Heizkörper, für Klimaanlagen sind meist mit Umlenkungen ausgestattet, so dass sie mehrfach durchströmt werden. Bei manchen Anlagekonzepten, die zum Beispiel einen unten angeordneten Kühlmitteleintritt und einen oben angeordneten Kühlmittelaustritt aufweisen, sind einfach durchströmte Wärmeübertrager vorzuziehen, da sich aufgrund der einfachen Durchströmung eine natürliche Schichtung einstellt. Allerdings ist die Heizleistung bei einfach durchströmten Wärmeübertragern, insbesondere Heizkörpern, im Vergleich zu Wärmeübertragern mit einer oder mehreren Umlenkungen des Kühlmittels bei gleicher Rohrgeometrie eher gering.From the German Offenlegungsschrift DE 101 27 084 A1 a heat exchanger for motor vehicles is known, which comprises a plurality of flat tubes, which are traversed by a liquid cooling medium. Between the flat tubes are arranged by ambient air or other media acted upon corrugated fins, wherein the flat tubes have on at least one of its flat sides inwardly directed indentations. Conventional heat exchangers, in particular radiators, for air conditioning systems are usually equipped with deflections, so that they are flowed through several times. In some investment concepts, which, for example, have a coolant inlet arranged at the bottom and a coolant outlet arranged at the top, simply through-flow heat exchangers are to be preferred, since due to the simple flow through a natural stratification occurs. However, the heating capacity in simply flowed through heat exchangers, in particular radiators, compared to heat exchangers with one or more deflections of the coolant at the same tube geometry rather low.

Aufgabe der Erfindung ist es, einen Wärmeübertrager, insbesondere einen Heizkörper, für eine Klimaanlage, gemäß dem Oberbegriff des Anspruchs 1 zu schaffen, der eine höhere Heizleistung aufweist als herkömmliche einfach durchströmte Wärmeübertrager, insbesondere Heizkörper.The object of the invention is to provide a heat exchanger, in particular a radiator, for an air conditioner, according to the preamble of claim 1, which has a higher heat output than conventional simply flowed through the heat exchanger, in particular radiator.

Die Aufgabe ist bei einem Wärmeübertrager, insbesondere einem Heizkörper, für eine Klimaanlage mit Flachrohren, die in einer Richtung von Kühlmittel durchströmt werden und zwischen denen Luftleiteinrichtungen angeordnet sind, die von Luft oder einem anderen Medium umströmt werden, dadurch gelöst, dass die Flachrohre eine lichte innere Rohrweite von mehr als 1,2 mm und Einprägungen aufweisen, die sich in den Innenraum der Flachrohre erstrecken. Als lichte innere Rohrweite wird die Höhe des Innenraums eines Flachrohrs bezeichnet. Die vorliegende Erfindung schafft entgegen von üblichen Auslegungsregeln und Vorurteilen einen Kompromiss zwischen der Forderung nach einer hohen Heizleistung und dem Ziel, den kühlmittelseitigen Druckabfall möglich klein zu halten. Die relativ große lichte innere Rohrweite führt zu einem relativ kleinen Druckabfall auf der Kühlmittelseite, aber auch zu geringerer Heizleistung. Dieser Nachteil kann jedoch durch die partiellen Einprägungen, die auch als Winglets bezeichnet werden, behoben werden. Durch die Einprägungen wird der Wärmeübergang auf der Kühlmittelseite verbessert, wobei der kühlmittelseitige Druckabfall bei geeigneter Geometrie der Einprägungen nicht oder nur moderat ansteigt.The object is in a heat exchanger, in particular a radiator, for an air conditioner with flat tubes, which are flowed through in a direction of coolant and between which louvers are arranged, which are flowed around by air or other medium, achieved in that the flat tubes a light Inner tube width of more than 1.2 mm and have indentations that extend into the interior of the flat tubes. As a clear inner tube width, the height of the interior of a flat tube is called. Contrary to common design rules and prejudices, the present invention provides a compromise between the requirement for high heat output and the goal of keeping the coolant side pressure drop as small as possible. The relatively large inner diameter of the pipe leads to a relatively small pressure drop on the coolant side, but also to lower heat output. However, this disadvantage can be overcome by the partial imprints, which are also referred to as winglets. The indentations improve the heat transfer on the coolant side, whereby the coolant-side pressure drop does not rise or only moderately increases with a suitable geometry of the impressions.

Ein bevorzugtes Ausführungsbeispiel des Wärmeübertragers ist dadurch gekennzeichnet, dass die Einprägungen eine Tiefe von 0,1 bis 0,4 mm aufweisen. Diese Werte haben sich im Rahmen der vorliegenden Erfindung als besonders vorteilhaft erwiesen.A preferred embodiment of the heat exchanger is characterized in that the indentations have a depth of 0.1 to 0.4 mm. These values have proven to be particularly advantageous in the context of the present invention.

Ein weiteres bevorzugtes Ausführungsbeispiel des Wärmeübertragers ist dadurch gekennzeichnet, dass die Flachrohre eine lichte innere Rohrweite von 1,3 bis 1,5 mm aufweisen. Vorzugsweise haben die Flachrohre eine lichte Rohrweite von 1,38 mm. Dabei sind übliche, herstellungsbedingte Toleranzen zu berücksichtigen.Another preferred embodiment of the heat exchanger is characterized in that the flat tubes have a clear inner tube width of 1.3 to 1.5 mm. Preferably, the flat tubes have a light Pipe width of 1.38 mm. In this case, customary manufacturing tolerances must be taken into account.

Ein weiteres bevorzugtes Ausführungsbeispiel des Wärmeübertragers ist dadurch gekennzeichnet, dass die Einprägungen von länglichen Vertiefungen gebildet werden, die auf jeweils einer Flachseite der Flachrohre vorgesehen sind.A further preferred embodiment of the heat exchanger is characterized in that the indentations are formed by elongated depressions, which are provided on each flat side of the flat tubes.

Ein weiteres bevorzugtes Ausführungsbeispiel des Wärmeübertragers ist dadurch gekennzeichnet, dass die Einprägungen von länglichen Vertiefungen gebildet werden, die jeweils auf beiden Flachseiten der Flachrohre vorgesehen sind. Damit wurden im Rahmen der vorliegenden Erfindung die besten Resultate erzielt.A further preferred embodiment of the heat exchanger is characterized in that the indentations are formed by elongated depressions, which are respectively provided on both flat sides of the flat tubes. Thus, the best results were achieved in the context of the present invention.

Ein weiteres bevorzugtes Ausführungsbeispiel des Wärmeübertragers ist dadurch gekennzeichnet, dass die Einprägungen noppenartig ausgebildet sind. Als besonders vorteilhaft hat sich eine Kombination von länglichen mit noppenartigen Einprägungen auf beiden Flachseiten der Flachrohre erwiesen.Another preferred embodiment of the heat exchanger is characterized in that the indentations are formed knob-like. Particularly advantageous is a combination of elongated with knob-like impressions on both flat sides of the flat tubes has proven.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung verschiedene Ausführungsbeispiele im Einzelnen beschrieben sind. Dabei können die in den Ansprüchen und in der Beschreibung erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein. Es zeigen:

Figur 1
einen erfindungsgemäßen Wärmeübertrager in der Draufsicht;
Figur 2
eine perspektivische Darstellung eines Abschnitts eines Flachrohrs mit Einprägungen und
Figur 3
neun Ausführungsbeispiele von Flachrohren in der Draufsicht.
Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. The features mentioned in the claims and in the description may each be essential to the invention individually or in any desired combination. Show it:
FIG. 1
a heat exchanger according to the invention in plan view;
FIG. 2
a perspective view of a portion of a flat tube with indentations and
FIG. 3
nine embodiments of flat tubes in plan view.

In Figur 1 ist ein Wärmeübertrager 1 in der Draufsicht dargestellt. Bei dem Wärmeübertrager 1 handelt es sich um einen Heizkörper einer Klimaanlage eines Kraftfahrzeugs. Der Wärmeübertrager 1 umfasst einen unteren Sammelkasten 4, der mit einem Eintrittsstutzen 5 ausgestattet ist, durch den, wie durch einen Pfeil 6 angedeutet ist, Kühlmittel in den Wärmeübertrager 1 eintritt. Des Weiteren weist der Wärmeübertrager 1 einen oberen Sammelkasten 7 auf, der mit einem Austrittsstutzen 8 ausgestattet ist, durch den, wie durch einen Pfeil 10 angedeutet ist, das Kühlmittel aus dem Wärmeübertrager 1 austritt. Die beiden Sammelkästen 4, 7 sind durch eine Vielzahl von Flachrohren miteinander verbunden, die in Richtung eines Pfeils 14 einfach von dem Kühlmittel durchströmt werden. Zwischen jeweils zwei Flachrohren ist ein Zwischenraum vorgesehen, in dem eine Luftleiteinrichtung, insbesondere eine Wellrippe angeordnet ist. Die Luftleiteinrichtungen zwischen den Flachrohren werden senkrecht zur Zeichenebene der Figur 1 von einem Medium, insbesondere von Umgebungsluft, durchströmt.FIG. 1 shows a heat exchanger 1 in plan view. The heat exchanger 1 is a radiator of an air conditioning system of a motor vehicle. The heat exchanger 1 comprises a lower collection box 4, which is equipped with an inlet connection 5, through which, as indicated by an arrow 6, coolant enters the heat exchanger 1. Furthermore, the heat exchanger 1 has an upper collecting box 7, which is equipped with an outlet nozzle 8, through which, as indicated by an arrow 10, the coolant exits the heat exchanger 1. The two header boxes 4, 7 are connected by a plurality of flat tubes, which are simply flowed through in the direction of an arrow 14 by the coolant. Between each two flat tubes, a gap is provided in which an air guide, in particular a corrugated fin is arranged. The louvers between the flat tubes are traversed perpendicularly to the plane of the drawing of a medium, in particular of ambient air.

In Figur 2 ist ein Abschnitt eines Flachrohrs 20 des in Figur 1 dargestellten Wärmeübertragers perspektivisch dargestellt. Das Flachrohr 20 weist in der Mitte eine in Längsrichtung verlaufende Sicke 22 auf, die dazu dient, dem Flachrohr 20 eine größere Steifigkeit zu verleihen. Wegen der Sicke 22 wird das Flachrohr 20 auch als Sickenrohr bezeichnet. Das Flachrohr 20 umfasst eine obere Flachseite 24 und eine untere Flachseite 25. Die beiden Flachseiten 24, 25 sind mit einer Vielzahl von länglichen Vertiefungen 26 bis 29 versehen.FIG. 2 shows in perspective a section of a flat tube 20 of the heat exchanger shown in FIG. The flat tube 20 has in the middle a longitudinally extending bead 22, which serves to give the flat tube 20 a greater rigidity. Because of the bead 22, the flat tube 20 is also referred to as a bead tube. The flat tube 20 comprises an upper flat side 24 and a lower flat side 25. The two flat sides 24, 25 are provided with a plurality of elongated depressions 26 to 29.

Im Rahmen der vorliegenden Erfindung werden hauptsächlich Flachrohre mit den Außenabmessungen 26,0 x 1,9 x 0,26 mm3 verwendet. Diese Flachrohre weisen eine lichte innere Rohrweite von 1,38 mm auf. Die Höhe der Einprägungen liegt im Bereich von 0,1 bis 0,4 mm. Durch die Höhe der Einprägungen kann der Wärmeübergang auf der Kühlmittelseite variiert werden, bis ein gewünschtes Leistungsresultat erzielt wird.In the context of the present invention, flat tubes with the outside dimensions 26.0 × 1.9 × 0.26 mm 3 are mainly used. These flat tubes have a clear inner tube width of 1.38 mm. The height of the impressions is in the range of 0.1 to 0.4 mm. Due to the height of the indentations, the heat transfer on the coolant side can be varied until a desired performance result is achieved.

In Figur 3 sind neun verschiedene rechteckförmige Abschnitte gezeigt, die jeweils ein Ausführungsbeispiel eines Flachrohrs in der Draufsicht darstellen. In durchgezogenen Linien sind verschiedene Einprägungen in der sichtbaren Flachseite des jeweiligen Flachrohrs dargestellt. Mit gestrichelten Linien sind Einprägungen in der darunter angeordneten Flachseite des jeweiligen Flachrohrs angedeutet.In Figure 3 nine different rectangular sections are shown, each representing an embodiment of a flat tube in plan view. In solid lines are different imprints in the visible Flat side of each flat tube shown. With dashed lines indentations in the underlying flat side of the respective flat tube are indicated.

Das Flachrohr 31 umfasst mehrere Einprägungen 41, 42, die jeweils paarweise V-förmig zueinander angeordnet sind. In der nicht sichtbaren Flachseite des Flachrohrs 31 sind ebenfalls Einprägungen 44, 45 ausgebildet, die sich mit den Einprägungen 41, 42 zu einer Raute ergänzen. Die Flachrohre 32 und 33 zeigen weitere V-förmige beziehungsweise rautenförmige Anordnungen von länglichen Einprägungen. Die Flachrohre 34 und 36 zeigen X-förmige Anordnungen von Einprägungen mit den beiden Flachseiten des jeweiligen Flachrohrs. Das Flachrohr 35 weist wiederum V-förmig angeordnete Einprägungen auf. Das Flachrohr 37 ist identisch zu dem Flachrohr 31 ausgebildet. Die Flachrohre 38 und 39 weisen zusätzlich zu länglichen Einprägungen beziehungsweise Vertiefungen, wie sie in 31 und 37 gezeigt sind, noch noppenartige Einprägungen 51 bis 54 auf. Die Flachrohre 31 bis 39 werden jeweils von unten nach oben durchströmt.The flat tube 31 includes a plurality of indentations 41, 42, which are each arranged in pairs V-shaped to each other. In the invisible flat side of the flat tube 31 also impressions 44, 45 are formed, which complement with the indentations 41, 42 to a rhombus. The flat tubes 32 and 33 show further V-shaped or diamond-shaped arrangements of oblong indentations. The flat tubes 34 and 36 show X-shaped arrangements of impressions with the two flat sides of the respective flat tube. The flat tube 35 in turn has V-shaped impressions. The flat tube 37 is formed identically to the flat tube 31. The flat tubes 38 and 39, in addition to elongated indentations or depressions, as shown in FIGS. 31 and 37, also have knob-like embossments 51 to 54. The flat tubes 31 to 39 are each flowed through from bottom to top.

Claims (7)

Wärmeübertrager, insbesondere Heizkörper, für eine Klimaanlage mit Flachrohren (20;31-39), die in einer Richtung von Kühlmittel durchströmt werden und zwischen denen Luftleiteinrichtungen angeordnet sind, die von Luft oder einem anderen Medium umströmt werden, dadurch gekennzeichnet, dass die Flachrohre (20;31-39) eine lichte innere Rohrweite von mehr als 1,2 mm und Einprägungen (26-29;41-45,51-54) aufweisen, die sich in den Innenraum der Flachrohre erstrecken.Heat exchanger, in particular radiator, for an air conditioner with flat tubes (20; 31-39), through which coolant flows in one direction and between which louvers are arranged, which are surrounded by air or another medium, characterized in that the flat tubes ( 20, 31-39) have a clear inner tube width of more than 1.2 mm and indentations (26-29, 41-45, 51-54) which extend into the interior of the flat tubes. Wärmeübertrager nach Anspruch 1, dadurch gekennzeichnet, dass die Einprägungen (26-29;41-45,51-54) eine Tiefe von 0,1 bis 0,4 mm aufweisen.Heat exchanger according to claim 1, characterized in that the indentations (26-29; 41-45, 51-54) have a depth of 0.1 to 0.4 mm. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Flachrohre (20;31-39) eine lichte innere Rohrweite von weniger als 1,8 mm aufweisen.Heat exchanger according to one of the preceding claims, characterized in that the flat tubes (20; 31-39) have a clear inner tube width of less than 1.8 mm. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Flachrohre (20;31-39) eine lichte innere Rohrweite von 1,3 bis 1,5 mm aufweisen.Heat exchanger according to one of the preceding claims, characterized in that the flat tubes (20; 31-39) have a clear inner tube width of 1.3 to 1.5 mm. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Einprägungen von länglichen Vertiefungen gebildet werden, die auf jeweils einer Flachseite der Flachrohre vorgesehen sind.Heat exchanger according to one of the preceding claims, characterized in that the indentations are formed by elongated depressions, which are provided on each flat side of the flat tubes. Wärmeübertrager nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Einprägungen (26-29;41-45) von länglichen Vertiefungen gebildet werden, die jeweils auf beiden Flachseiten der Flachrohre vorgesehen sind.Heat exchanger according to one of claims 1 to 3, characterized in that the indentations (26-29, 41-45) are formed by elongated recesses, which are respectively provided on both flat sides of the flat tubes. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Einprägungen (51-54) noppenartig ausgebildet sind.Heat exchanger according to one of the preceding claims, characterized in that the indentations (51-54) are formed knob-like.
EP06015635.3A 2005-09-17 2006-07-27 Heat exchanger, especially radiator, for air conditioning system Not-in-force EP1764571B1 (en)

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DE200510044558 DE102005044558A1 (en) 2005-09-17 2005-09-17 Heat exchanger, in particular radiator, for air conditioning

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US20180017024A1 (en) * 2016-07-12 2018-01-18 Borgwarner Emissions Systems Spain, S.L.U. Heat exchanger for an egr system
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EP1398589A2 (en) * 2002-09-12 2004-03-17 Modine Manufacturing Company Coolant radiator
WO2004106835A2 (en) * 2003-05-29 2004-12-09 Halla Climate Control Corporation Plate for heat exchanger
WO2005005904A1 (en) * 2003-07-15 2005-01-20 Outokumpu Copper Products Oy Pressure containing heat transfer tube and method of making thereof
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WO2017140851A1 (en) * 2016-02-19 2017-08-24 Valeo Termico, S.A. Circulation duct for conveying a fluid of a heat exchanger, and heat exchanger
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CN109489466A (en) * 2018-11-13 2019-03-19 哈尔滨工程大学 A kind of heat exchanger with staggeredly concaveconvex structure

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