EP1552238B1 - Heat exchanger, in particular evaporator - Google Patents

Heat exchanger, in particular evaporator Download PDF

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Publication number
EP1552238B1
EP1552238B1 EP03747979A EP03747979A EP1552238B1 EP 1552238 B1 EP1552238 B1 EP 1552238B1 EP 03747979 A EP03747979 A EP 03747979A EP 03747979 A EP03747979 A EP 03747979A EP 1552238 B1 EP1552238 B1 EP 1552238B1
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EP
European Patent Office
Prior art keywords
heat exchanger
longitudinal
exchanger according
web
separating wall
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
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EP03747979A
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German (de)
French (fr)
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EP1552238A1 (en
Inventor
Andreas Leister
Kurt Molt
Wolfgang Seewald
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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 EP1552238A1 publication Critical patent/EP1552238A1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/0202Header boxes having their inner space divided by partitions
    • F28F9/0204Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0214Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00Heat-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
    • F28D1/02Heat-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
    • F28D1/04Heat-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
    • F28D1/053Heat-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
    • F28D1/0535Heat-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
    • F28D1/05366Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05391Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0085Evaporators

Definitions

  • the invention relates to a heat exchanger, in particular an evaporator, consisting of a heat exchanger network of corrugated fins and flat tubes, according to the preamble of claim 1 - known by the DE-A-3813339 ,
  • the one by the DE-A 198 26 881 become known soldered flat tube evaporator is formed in two rows, ie, seen in the direction of air flow, there are two rows of flat tubes, between which corrugated fins are arranged, one behind the other, the ends of the flat tubes open into collection boxes, each through a longitudinal partition in a front and a rear chamber are divided. Within these chambers partially transverse partitions are provided.
  • the flow of the refrigerant extends in the rows of flat tubes both from top to bottom and from bottom to top, wherein a deflection of the refrigerant on the one hand “in width”, ie transversely to the air flow direction and on the other hand “in depth”, ie in the air flow direction.
  • Object of the present invention is therefore to improve a heat exchanger of the type mentioned in that its production is simplified and thus reduces production costs and its performance can be improved.
  • the heat exchanger according to the invention is formed einreihig, d. H. the flat tubes are continuous throughout the depth (in the direction of air flow) and provided with a longitudinal divider which is brazed to the longitudinal divider wall.
  • the single-row heat exchanger according to the invention and the double-row heat exchanger according to the prior art are thus functionally identical with regard to the refrigerant charge.
  • From the construction according to the invention has the advantage that the continuous flat tubes and the continuous corrugated fins are much easier to cassettieren and that beyond the insertion of the flat tubes in the bottoms results in a stop that defines the insertion depth of the flat tube ends.
  • the heat transfer performance is increased because a heat transfer takes place over the entire depth of the heat exchanger.
  • the flat tube end is divided into two flat tube ends, which are received by passages of the soil, these passages are interrupted in the region of the longitudinal partition wall.
  • the flat tube end is straight, d. H. without a recess and is absorbed by a continuous passage in the floors of the collecting tanks. This results in a good soldering of the flat tubes in the floors.
  • the longitudinal dividing wall has recesses in the region of the passages and the flat tubes arranged in the passages, which are adapted to the contour of passage and flat tube and thus ensure good soldering.
  • the flat tube has a constant thickness.
  • the flat tube has a smaller thickness in the region of the separating web, specifically in the form of a narrow central web connecting the two flat tube halves.
  • the flat tube end is also straight, ie inserted without recess and through an opening in the bottom, which corresponds to the contour of the flat tube end.
  • the longitudinal dividing wall has narrow slots or recesses in the area of the narrow central webs projecting into the collecting box, which overlap the middle webs - this results in a region in which there is a dense soldering between the longitudinal dividing wall and the dividing web ensured.
  • the. Openings in the ground partially as passages, ie formed in the region of the longitudinal partition broken passages.
  • Fig. 1 shows as an example of a heat exchanger according to the invention a single-row flat tube evaporator 1 with a heat exchanger network 2 and an upper header 3 and a lower header 4.
  • this evaporator 1 corresponds to the generic state of the art, ie DE-A 198 26 881 or DE-A-3813339 ,
  • the guidance of the refrigerant, ie the flow pattern essentially corresponds to this prior art.
  • Fig. 1a shows a section in the region of the collecting tube 3 from the evaporator 1.
  • the collecting box 3 is divided by a longitudinal partition wall 5 into two chambers 6a and 6b, in which ends 7, 8 of flat tubes 9 open, which are formed continuously, ie the only row of tubes this Form evaporator 1. Between the flat tubes 9 continuous corrugated fins 10 are arranged, which are flowed over by ambient air.
  • the collection box 4, not shown here is constructed analogously.
  • Fig. 2 shows a similar section as Fig. 1a ie, an upper header 11 divided into two longitudinal chambers 12, 13.
  • a continuous flat tube 14 is formed as an extruded tube and has a plurality of channels 14 'on.
  • a separating web 15 is arranged, which divides the flat tube 14 into two flow paths 14a and 14b.
  • the separating web 15 terminates in the upper region of the flat tube 14 which opens into the chambers 12, 13 in a recess 16 into which a longitudinal dividing wall 17 of the collecting box 11 engages.
  • the flat tube 14 thus has on both sides of the recess 16 two flat tube ends 18, 19, which communicate with the flow paths 14b and 14a.
  • Fig. 2a shows a section Fig. 2 in the region of the longitudinal dividing wall 17, which is formed from two adjacent sheet metal sections 17a, 17b of the collecting tank 11.
  • the lower end 17 c of the partition wall 17 rests on a bottom 20, which is part of the collecting box 11. From the bottom 20 passages 21 are formed, which receive the pipe ends 18, 19 and are interrupted in the region of the longitudinal partition wall 17.
  • Fig. 2b shows a section BB (see. Fig. 2c ) in the plane of the longitudinal dividing wall 17 and the separating webs 15. It can be seen that the upper edge 15a of the separating web 15 abuts against the underside 20a of the bottom 20; the bottom 20 is thus clamped between the upper edge 15a of the separating webs 15 and the lower edge 17c of the longitudinal dividing wall 17. All contact points solder together and thus ensure a secure seal between the two chambers 12, 13 and the flow paths 14a, 14b.
  • Fig. 2c shows a further illustration, namely a section along the plane AA (see. Fig. 2b It can be seen that the split flat tube ends 18, 19 are received in passages 21 which are interrupted due to the longitudinal dividing wall 17.
  • Fig. 2d shows a part of the longitudinal partition wall 17 with a tab 22, the - as well as in Fig. 2b recognizable - plugged to caulk the header box in a corresponding slot in the ground and is soldered to this tight. Otherwise, the lower edge 17 c of the partition wall 17 is straight, ie adapted to the contour of the bottom 20.
  • FIG. 3 shows a second embodiment relevant to the invention.
  • a flat tube 23 is divided by a dividing web 24 in the middle, the end 24a of the dividing web 24 lying flush with the upper edge 23a of the flat tubes - the flat tube 23 has, in contrast to the flat tube 14 Fig. 2 so no recess on.
  • a longitudinal partition 25 extends.
  • Fig. 3a shows a section Fig. 3 in the region of the longitudinal dividing wall 25, which rests on the one hand with its lower edge 25c on a bottom 26 and on the other hand has recesses 27 in the region of the continuous flat tubes 23.
  • the recesses 27 in the partition are clearly in Fig. 3d to recognize - they are adapted in shape to the contour of the continuous passages 28 and the flat tubes 23, which are slightly above the upper edge of the passages 27 addition. Due to the continuous passages 28 results in a good soldering of the ends of the flat tubes 23 with the bottom 26.
  • the partition 25 is also soldered with its entire lower contour, as in Fig. 3d can be seen, with the bottom 26, the passages 28 and the upper edge 24 a of the separating web 24th
  • Fig. 3b shows a section BB in the plane of the partition 25 (corresponding to the plane BB in Fig. 3c ). This results in a dense foreclosure of the two chambers on both sides of the partition 25th
  • Fig. 3d shows between the two recesses 27 a tab 29, which, as in Fig. 3b recognizable - engages the bottom 26 and soldered there.
  • Fig. 4 shows an embodiment of the invention with a continuous flat tube 30, which in turn is divided in the middle by a divider 31 in two flow paths.
  • the flat tube 30 terminates in the two chambers 32, 33 of the collecting tank 34 with the longitudinal partition 35, the - Fig. 4a shows - rests on a bottom 36 of the collecting box 34.
  • Fig. 4c shows that this separation web 31 (narrow center web) has a relatively small thickness compared to the thickness of the flat tube 30.
  • the ends of the flat tubes 30 are received in non-continuous passages 37, which are interrupted in the region of the partition wall 35.
  • the partition wall 35 has - as in Fig. 4d clearly recognizable - from its lower edge 35a outgoing slots 38, which correspond to the contour of the narrow central webs 31 and these include (see. Fig. 4b ).
  • the ends of the narrow central webs 31 thus project slightly beyond the bottom 36 and therefore engage in the slots 38 of the partition 35.
  • the partition 35 further comprises (see. Fig. 4d ) projecting from its lower edge 35a tabs 39 which engage in the bottom 36 (see. Fig. 4b ).
  • connections, not shown, between the lower header 4 and the lower end of the flat tubes 14, 23, 30 are preferably analogous to the embodiments described above.
  • the invention has been described with reference to embodiments in which the collecting boxes are each made of a one-piece sheet, which is formed such that two of its longitudinal sides form the longitudinal partition wall of the collecting tank.
  • This embodiment is in the DE-A 198 26 881 described. If the collecting tank is placed in its entirety on the flat tube ends during the manufacture of the heat exchanger, the advantages of the invention are particularly borne, in particular the stop for the tube ends in the collecting box, since the tubes are thereby fixable in their position.
  • the invention also includes other embodiments, such as heat exchangers with two-piece, ie consisting of tube sheet and lid headers.

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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)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention relates to a heat exchanger, in particular an evaporator, consisting of a heat exchange network of undulating ribs and flat pipes, in addition to two collecting basins, subdivided into chambers by longitudinal partitions. Said collecting basins have bases provided with orifices, in which the ends of the flat pipes are housed. According to the invention, the flat pipes (14) are configured to run in the direction of the air flow and are arranged in a row, each pipe comprising a separating strut (15) that runs longitudinally and is aligned with the longitudinal partitions (17). The separating struts and longitudinal partitions are soldered together.

Description

Die Erfindung bezieht sich auf einen Wärmeübertrager, insbesondere einen Verdampfer, bestehend aus einem Wärmeübertragernetz von Wellrippen und Flachrohren, nach dem Oberbegriff des Patentanspruches 1 - bekannt durch die DE-A-3813339 .The invention relates to a heat exchanger, in particular an evaporator, consisting of a heat exchanger network of corrugated fins and flat tubes, according to the preamble of claim 1 - known by the DE-A-3813339 ,

Der durch die DE-A 198 26 881 bekannt gewordene gelötete Flachrohrverdampfer ist zweireihig ausgebildet, d. h., in Luftströmungsrichtung gesehen, befinden sich zwei Reihen von Flachrohren, zwischen denen Wellrippen angeordnet sind, hintereinander, wobei die Enden der Flachrohre in Sammelkästen münden, die jeweils durch eine Längstrennwand in eine vordere und eine hintere Kammer unterteilt sind. Innerhalb dieser Kammern sind teilweise Quertrennwände vorgesehen. Die Strömung des Kältemittels verläuft in den Flachrohrreihen sowohl von oben nach unten als auch von unten nach oben, wobei eine Umlenkung des Kältemittels einerseits "in der Breite", d. h. quer zur Luftströmungsrichtung und andererseits "in der Tiefe", d. h. in Luftströmungsrichtung erfolgt. Letzteres geschieht durch Überströmöffnungen in der Längstrennwand. Die Herstellung eines solchen Verdampfers wirft, insbesondere beim so genannten Kassettieren, d. h. dem Aufbau des Wärmeübertragernetzes aus Wellrippen und Flachrohren gewisse Probleme auf. Beide Flachrohrreihen müssen genau ausgerichtet werden, damit ihre Enden beim Aufsetzen der Sammelkästen genau in deren Öffnungen passen. Darüber hinaus müssen die Wellrippen zwischen den Flachrohren ebenfalls ausgerichtet werden. Schließlich kann es beim Aufsetzen der Böden auf die Rohrenden zu unterschiedlichen Einstecktiefen der Rohrenden kommen, weil weder an den Flachrohren noch an den Sammelkästen entsprechende Anschläge oder dergleichen vorgesehen sind. Im Hinblick auf die Wärmeübertragungsleistung ergeben sich insofern Potenziale, als die gesamte Tiefe (in Luftströmungsrichtung) dieses Verdampfers nicht in vollem Umfang für die Wärmeübertragung genutzt ist, weil sich zwischen beiden Rohrreihen ein Luftspalt befindet.The one by the DE-A 198 26 881 become known soldered flat tube evaporator is formed in two rows, ie, seen in the direction of air flow, there are two rows of flat tubes, between which corrugated fins are arranged, one behind the other, the ends of the flat tubes open into collection boxes, each through a longitudinal partition in a front and a rear chamber are divided. Within these chambers partially transverse partitions are provided. The flow of the refrigerant extends in the rows of flat tubes both from top to bottom and from bottom to top, wherein a deflection of the refrigerant on the one hand "in width", ie transversely to the air flow direction and on the other hand "in depth", ie in the air flow direction. The latter happens through overflow openings in the longitudinal partition wall. The production of such an evaporator raises certain problems, in particular in the case of so-called cassetting, ie the construction of the heat exchanger network of corrugated fins and flat tubes. Both rows of flat tubes must be precisely aligned so that their ends fit exactly into their openings when placing the headers. In addition, the corrugated fins between the flat tubes must also be aligned. Finally, it can come to different insertion depths of the pipe ends when placing the floors on the pipe ends, because neither stops are provided on the flat tubes still on the manifolds or the like. With regard to the heat transfer performance, there are potentials insofar as the entire depth (in the air flow direction) of this evaporator is not fully utilized for the heat transfer, because there is an air gap between the two rows of tubes.

Aufgabe der vorliegenden Erfindung ist es daher, einen Wärmeübertrager der eingangs genannten Art dahingehend zu verbessern, dass seine Herstellung vereinfacht wird und damit die Produktionskosten gesenkt sowie seine Leistung verbessert werden.Object of the present invention is therefore to improve a heat exchanger of the type mentioned in that its production is simplified and thus reduces production costs and its performance can be improved.

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Patentanspruches 1. Danach ist der erfindungsgemäße Wärmeübertrager einreihig ausgebildet, d. h. die Flachrohre sind über die Tiefe (in Luftströmungsrichtung) durchgehend ausgebildet und mit einem in Längsrichtung verlaufenden Trennsteg versehen, der mit der Längstrennwand verlötet ist. Der erfindungsgemäße einreihige Wärmeübertrager und der zweireihige Wärmeübertrager nach dem Stand der Technik sind somit - im Hinblick auf die Kältemittelführung - funktionell gleich. Aus der erfindungsgemäßen Bauweise ergibt sich der Vorteil, dass die durchgehenden Flachrohre und auch die durchgehenden Wellrippen wesentlich einfacher zu kassettieren sind und dass sich darüber hinaus beim Einstecken der Flachrohre in die Böden ein Anschlag ergibt, der die Einstecktiefe der Flachrohrenden definiert. Schließlich wird auch die Wärmeübertragungsleistung gesteigert, weil eine Wärmeübertragung über die gesamte Tiefe des Wärmeübertragers erfolgt.The solution of this problem arises from the features of claim 1. Thereafter, the heat exchanger according to the invention is formed einreihig, d. H. the flat tubes are continuous throughout the depth (in the direction of air flow) and provided with a longitudinal divider which is brazed to the longitudinal divider wall. The single-row heat exchanger according to the invention and the double-row heat exchanger according to the prior art are thus functionally identical with regard to the refrigerant charge. From the construction according to the invention has the advantage that the continuous flat tubes and the continuous corrugated fins are much easier to cassettieren and that beyond the insertion of the flat tubes in the bottoms results in a stop that defines the insertion depth of the flat tube ends. Finally, the heat transfer performance is increased because a heat transfer takes place over the entire depth of the heat exchanger.

Durch die FR-A 2 803 377 wurde zwar ein einreihiger Flachrohrverdampfer mit einer U-förmigen Kältemittelführung durch die Flachrohre bekannt - allerdings ist über die Verbindung zwischen der im Sammelkasten angeordneten Längstrennwand und den Flachrohren nichts ausgesagt. Diese Verbindung stellt jedoch bei einer Lötkonstruktion ein besonderes Problem dar, welches durch die Erfindung gelöst wird. Darüber hinaus weist dieser Verdampfer nur einen Sammelkasten mit Längstrennwand auf, d. h. die Umlenkung des Kältemittels erfolgt in den Flachrohren und ausschließlich "in der Tiefe".By the FR-A 2 803 377 Although a single-row flat tube evaporator with a U-shaped refrigerant guide through the flat tubes was known - but nothing is said about the connection between the arranged in the collecting box longitudinal partition wall and the flat tubes. However, this connection presents a particular problem in a soldering construction, which is solved by the invention. In addition, this evaporator has only one collecting box with longitudinal partition, ie the deflection of the refrigerant takes place in the flat tubes and only "in depth".

Vorteilhafte Ausgestaltungen der Erfindung gemäß Anspruch 1 ergeben sich aus den Unteransprüchen.Advantageous embodiments of the invention according to claim 1 emerge from the dependent claims.

In der Erfindung weist das Ende des Flachrohres im Bereich des Trennsteges eine Aussparung auf, mit der es sich gegenüber der Unterseite des Bodens abstützt. Andererseits greift von oben die Längstrennwand in diese Aussparung ein und gewährleistet somit eine dichte Verlötung. Durch die Aussparung wird das Flachrohrende in zwei Flachrohrenden geteilt, die von Durchzügen des Bodens aufgenommen werden, wobei diese Durchzüge im Bereich der längs verlaufenden Trennwand unterbrochen sind.In the invention, the end of the flat tube in the region of the separating web on a recess with which it is supported against the underside of the bottom. On the other hand engages from above the longitudinal partition in this recess and thus ensures a tight soldering. Through the recess, the flat tube end is divided into two flat tube ends, which are received by passages of the soil, these passages are interrupted in the region of the longitudinal partition wall.

In der Erfindung ist das Flachrohrende gerade, d. h. ohne eine Aussparung und wird von einem durchgehenden Durchzug in den Böden der Sammelkästen aufgenommen. Dies ergibt eine gute Verlötung der Flachrohre in den Böden. Die Längstrennwand weist dagegen im Bereich der Durchzüge und der in den Durchzügen angeordneten Flachrohre Aussparungen auf, die an die Kontur von Durchzug und Flachrohr angepasst sind und somit eine gute Verlötung gewährleisten. Bei den zuvor erwähnten Lösungen weist das Flachrohr eine gleich bleibende Dicke auf.In the invention, the flat tube end is straight, d. H. without a recess and is absorbed by a continuous passage in the floors of the collecting tanks. This results in a good soldering of the flat tubes in the floors. In contrast, the longitudinal dividing wall has recesses in the region of the passages and the flat tubes arranged in the passages, which are adapted to the contour of passage and flat tube and thus ensure good soldering. In the aforementioned solutions, the flat tube has a constant thickness.

Gemäss der Erfindung weist das Flachrohr im Bereich des Trennsteges eine geringere Dicke auf, und zwar in Form eines schmalen Mittelsteges, der die beiden Flachrohrhälften verbindet. Das Flachrohrende ist ebenfalls gerade, d. h. ohne Aussparung und durch eine Öffnung im Boden gesteckt, die der Kontur des Flachrohrendes entspricht. Die Längstrennwand weist im Bereich der in den Sammelkasten hineinragenden schmalen Mittelstege schmale Schlitze oder Aussparungen auf, welche die Mittelstege übergreifen - dadurch ist in diesem Bereich eine dichte Verlötung zwischen Längstrennwand und Trennsteg gewährleistet. Vorteilhafterweise sind die. Öffnungen im Boden teilweise als Durchzüge, d. h. im Bereich der Längstrennwand unterbrochene Durchzüge ausgebildet.According to the invention, the flat tube has a smaller thickness in the region of the separating web, specifically in the form of a narrow central web connecting the two flat tube halves. The flat tube end is also straight, ie inserted without recess and through an opening in the bottom, which corresponds to the contour of the flat tube end. The longitudinal dividing wall has narrow slots or recesses in the area of the narrow central webs projecting into the collecting box, which overlap the middle webs - this results in a region in which there is a dense soldering between the longitudinal dividing wall and the dividing web ensured. Advantageously, the. Openings in the ground partially as passages, ie formed in the region of the longitudinal partition broken passages.

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

Fig. 1
einen einreihigen Flachrohrverdampfer ,
Fig. 1a
einen Ausschnitt des Flachrohrverdampfers gemäß Fig. 1,
Fig. 2, 2a, 2b, 2c, 2d
eine Ausführungsform relevant für die Erfindung mit Aussparung im Flachrohrende,
Fig. 3,
3a,
3b, 3c, 3d
eine zweite Ausführungsform relevant für die Erfindung mit Aussparung in der Längstrennwand und
Fig. 4, 4a, 4b, 4c, 4d
eine Ausführungsform der Erfindung mit schmalem Mittel- steg.
Embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it
Fig. 1
a single-row flat tube evaporator,
Fig. 1a
a section of the flat tube evaporator according to Fig. 1 .
Fig. 2, 2a, 2b, 2c, 2d
an embodiment relevant to the invention with recess in the flat tube end,
3,
3a,
3b, 3c, 3d
a second embodiment relevant to the invention with recess in the longitudinal partition wall and
Fig. 4, 4a, 4b, 4c, 4d
an embodiment of the invention with a narrow center web.

Fig. 1 zeigt als Beispiel für einen erfindungsgemäßen Wärmeübertrager einen einreihigen Flachrohrverdampfer 1 mit einem Wärmeübertragernetz 2 und einem oberen Sammelkasten 3 sowie einem unteren Sammelkasten 4. Hinsichtlich der hier nicht dargestellten Kältemittelanschlüsse entspricht dieser Verdampfer 1 dem gattungsgemäßen Stand der Technik, d. h. der DE-A 198 26 881 oder DE-A-3813339 . Auch die Führung des Kältemittels, d. h. das Strömungsmuster entspricht im Wesentlichen diesem Stand der Technik. Fig. 1 shows as an example of a heat exchanger according to the invention a single-row flat tube evaporator 1 with a heat exchanger network 2 and an upper header 3 and a lower header 4. With regard to the refrigerant connections not shown here, this evaporator 1 corresponds to the generic state of the art, ie DE-A 198 26 881 or DE-A-3813339 , The guidance of the refrigerant, ie the flow pattern essentially corresponds to this prior art.

Fig. 1a zeigt einen Ausschnitt im Bereich des Sammelrohres 3 aus dem Verdampfer 1. Der Sammelkasten 3 ist durch eine Längstrennwand 5 in zwei Kammern 6a und 6b unterteilt, in welche Enden 7, 8 von Flachrohren 9 münden, die durchgehend ausgebildet sind, d. h. die einzige Rohrreihe dieses Verdampfers 1 bilden. Zwischen den Flachrohren 9 sind durchgehende Wellrippen 10 angeordnet, die von Umgebungsluft überströmt werden. Der hier nicht dargestellte Sammelkasten 4 ist analog aufgebaut. Fig. 1a shows a section in the region of the collecting tube 3 from the evaporator 1. The collecting box 3 is divided by a longitudinal partition wall 5 into two chambers 6a and 6b, in which ends 7, 8 of flat tubes 9 open, which are formed continuously, ie the only row of tubes this Form evaporator 1. Between the flat tubes 9 continuous corrugated fins 10 are arranged, which are flowed over by ambient air. The collection box 4, not shown here is constructed analogously.

Fig. 2 sowie die Fig. 2a bis 2d zeigen ein Ausführungsbeispiel relevant für die Erfindung. Fig. 2 zeigt einen ähnlichen Ausschnitt wie Fig. 1a, d. h. einen oberen Sammelkasten 11, der in zwei in Längsrichtung verlaufenden Kammern 12, 13 unterteilt ist. Ein durchgehendes Flachrohr 14 ist als extrudiertes Rohr ausgebildet und weist eine Vielzahl von Kanälen 14' auf. Mittig und in Längsrichtung des Flachrohres 14 verlaufend, ist ein Trennsteg 15 angeordnet, der das Flachrohr 14 in zwei Strömungswege 14a und 14b unterteilt. Der Trennsteg 15 endet im oberen in die Kammern 12, 13 mündenden Bereich des Flachrohres 14 in einer Aussparung 16, in welche eine Längstrennwand 17 des Sammelkastens 11 eingreift. Das Flachrohr 14 weist somit beiderseits der Aussparung 16 zwei Flachrohrenden 18, 19 auf, die mit den Strömungswegen 14b bzw. 14 a kommunizieren. Fig. 2 as well as the Fig. 2a to 2d show an embodiment relevant to the invention. Fig. 2 shows a similar section as Fig. 1a ie, an upper header 11 divided into two longitudinal chambers 12, 13. A continuous flat tube 14 is formed as an extruded tube and has a plurality of channels 14 'on. Running centrally and in the longitudinal direction of the flat tube 14, a separating web 15 is arranged, which divides the flat tube 14 into two flow paths 14a and 14b. The separating web 15 terminates in the upper region of the flat tube 14 which opens into the chambers 12, 13 in a recess 16 into which a longitudinal dividing wall 17 of the collecting box 11 engages. The flat tube 14 thus has on both sides of the recess 16 two flat tube ends 18, 19, which communicate with the flow paths 14b and 14a.

Fig. 2a zeigt einen Ausschnitt aus Fig. 2 im Bereich der Längstrennwand 17, die aus zwei aneinander liegenden Blechabschnitten 17a, 17b des Sammelkastens 11 gebildet ist. Das untere Ende 17c der Trennwand 17 liegt auf einem Boden 20 auf, der Teil des Sammelkasten 11 ist. Aus dem Boden 20 sind Durchzüge 21 ausgeformt, welche die Rohrenden 18, 19 aufnehmen und im Bereich der Längstrennwand 17 unterbrochen sind. Fig. 2a shows a section Fig. 2 in the region of the longitudinal dividing wall 17, which is formed from two adjacent sheet metal sections 17a, 17b of the collecting tank 11. The lower end 17 c of the partition wall 17 rests on a bottom 20, which is part of the collecting box 11. From the bottom 20 passages 21 are formed, which receive the pipe ends 18, 19 and are interrupted in the region of the longitudinal partition wall 17.

Fig. 2b zeigt einen Schnitt B-B (vgl. Fig. 2c) in der Ebene der Längstrennwand 17 und der Trennstege 15. Man sieht, dass die Oberkante 15a des Trennsteges 15 an die Unterseite 20a des Bodens 20 anstößt; der Boden 20 ist somit zwischen Oberkante 15a der Trennstege 15 und Unterkante 17c der Längstrennwand 17 eingespannt. Alle Kontaktstellen verlöten miteinander und gewährleisten somit eine sichere Abdichtung zwischen den beiden Kammern 12, 13 und den Strömungswegen 14a, 14b. Fig. 2b shows a section BB (see. Fig. 2c ) in the plane of the longitudinal dividing wall 17 and the separating webs 15. It can be seen that the upper edge 15a of the separating web 15 abuts against the underside 20a of the bottom 20; the bottom 20 is thus clamped between the upper edge 15a of the separating webs 15 and the lower edge 17c of the longitudinal dividing wall 17. All contact points solder together and thus ensure a secure seal between the two chambers 12, 13 and the flow paths 14a, 14b.

Fig. 2c zeigt eine weitere Darstellung, und zwar einen Schnitt längs der Ebene A-A (vgl. Fig. 2b), d. h. etwa parallel zum Boden 20 durch die Trennwand 17. Man erkennt, dass die geteilten Flachrohrenden 18, 19 in Durchzügen 21 aufgenommen sind, die aufgrund der Längstrennwand 17 unterbrochen sind. Fig. 2c shows a further illustration, namely a section along the plane AA (see. Fig. 2b It can be seen that the split flat tube ends 18, 19 are received in passages 21 which are interrupted due to the longitudinal dividing wall 17.

Fig. 2d zeigt einen Teil der Längstrennwand 17 mit einem Lappen 22, der - wie auch in Fig. 2b erkennbar - zur Verstemmung des Sammelkastens in einen entsprechenden Schlitz im Boden gesteckt und mit diesem dicht verlötet ist. Ansonsten ist die Unterkante 17c der Trennwand 17 durchgehend gerade, d. h. an die Kontur des Bodens 20 angepasst. Fig. 2d shows a part of the longitudinal partition wall 17 with a tab 22, the - as well as in Fig. 2b recognizable - plugged to caulk the header box in a corresponding slot in the ground and is soldered to this tight. Otherwise, the lower edge 17 c of the partition wall 17 is straight, ie adapted to the contour of the bottom 20.

Fig. 3 sowie die Fig. 3a bis 3d zeigen ein zweites Ausführungsbeispiel relevant für die Erfindung. Ein Flachrohr 23 ist durch einen Trennsteg 24 in der Mitte geteilt, wobei das Ende 24a des Trennsteges 24 mit der Oberkante 23a der Flachrohre auf einer Höhe liegt - das Flachrohr 23 weist im Gegensatz zu dem Flachrohr 14 aus Fig. 2 also keine Aussparung auf. In Verlängerung des Steges 24 erstreckt sich eine Längstrennwand 25. Fig. 3 as well as the Fig. 3a to 3d show a second embodiment relevant to the invention. A flat tube 23 is divided by a dividing web 24 in the middle, the end 24a of the dividing web 24 lying flush with the upper edge 23a of the flat tubes - the flat tube 23 has, in contrast to the flat tube 14 Fig. 2 so no recess on. In extension of the web 24, a longitudinal partition 25 extends.

Fig. 3a zeigt einen Ausschnitt aus Fig. 3 im Bereich der Längstrennwand 25, die einerseits mit ihrer Unterkante 25c auf einem Boden 26 aufliegt und andererseits Aussparungen 27 im Bereich der durchgehenden Flachrohre 23 aufweist. Aus dem Boden 26 sind durchgehende Durchzüge 28 ausgeformt, was besonders deutlich aus der Draufsicht in Fig. 3c hervorgeht. Die Aussparungen 27 in der Trennwand sind deutlich in Fig. 3d zu erkennen - sie sind in ihrer Form der Kontur der durchgehenden Durchzüge 28 und der Flachrohre 23 angepasst, die etwas über die Oberkante der Durchzüge 27 hinaus stehen. Aufgrund der durchgehenden Durchzüge 28 ergibt sich eine gute Verlötung der Enden der Flachrohre 23 mit dem Boden 26. Die Trennwand 25 verlötet ebenfalls mit ihrer gesamten unteren Kontur, wie sie in Fig. 3d erkennbar ist, mit dem Boden 26, den Durchzügen 28 und der Oberkante 24a des Trennsteges 24. Fig. 3a shows a section Fig. 3 in the region of the longitudinal dividing wall 25, which rests on the one hand with its lower edge 25c on a bottom 26 and on the other hand has recesses 27 in the region of the continuous flat tubes 23. From the bottom 26 continuous passages 28 are formed, which is particularly clear from the top view in Fig. 3c evident. The recesses 27 in the partition are clearly in Fig. 3d to recognize - they are adapted in shape to the contour of the continuous passages 28 and the flat tubes 23, which are slightly above the upper edge of the passages 27 addition. Due to the continuous passages 28 results in a good soldering of the ends of the flat tubes 23 with the bottom 26. The partition 25 is also soldered with its entire lower contour, as in Fig. 3d can be seen, with the bottom 26, the passages 28 and the upper edge 24 a of the separating web 24th

Fig. 3b zeigt einen Schnitt B-B in der Ebene der Trennwand 25 (entsprechend der Ebene B-B in Fig. 3c). Es ergibt sich somit eine dichte Abschottung der beiden Kammern beiderseits der Trennwand 25. Fig. 3b shows a section BB in the plane of the partition 25 (corresponding to the plane BB in Fig. 3c ). This results in a dense foreclosure of the two chambers on both sides of the partition 25th

Fig. 3d zeigt zwischen den beiden Aussparungen 27 einen Lappen 29, der, wie auch in Fig. 3b erkennbar - in den Boden 26 eingreift und dort verlötet ist. Fig. 3d shows between the two recesses 27 a tab 29, which, as in Fig. 3b recognizable - engages the bottom 26 and soldered there.

Fig. 4 zeigt ein Ausführungsbeispiel der Erfindung mit einem durchgehenden Flachrohr 30, welches wiederum in der Mitte durch einen Trennsteg 31 in zwei Strömungswege unterteilt ist. Das Flachrohr 30 mündet endseitig in die beiden Kammern 32, 33 des Sammelkastens 34 mit der Längstrennwand 35, die - wie Fig. 4a zeigt - auf einem Boden 36 des Sammelkasten 34 aufliegt. Fig. 4 shows an embodiment of the invention with a continuous flat tube 30, which in turn is divided in the middle by a divider 31 in two flow paths. The flat tube 30 terminates in the two chambers 32, 33 of the collecting tank 34 with the longitudinal partition 35, the - Fig. 4a shows - rests on a bottom 36 of the collecting box 34.

Fig. 4c zeigt, dass dieser Trennsteg 31 (schmaler Mittelsteg) eine relativ geringe Dicke gegenüber der Dicke des Flachrohres 30 aufweist. Die Enden der Flachrohre 30 sind in nicht durchgehenden Durchzügen 37 aufgenommen, die im Bereich der Trennwand 35 unterbrochen sind. Die Trennwand 35 weist - wie in Fig. 4d deutlich erkennbar - von ihrer Unterkante 35a ausgehende Schlitze 38 auf, welche der Kontur der schmalen Mittelstege 31 entsprechen und diese umfassen (vgl. Fig. 4b). Die Enden der schmalen Mittelstege 31 ragen also etwas über den Boden 36 hinaus und greifen daher in die Schlitze 38 der Trennwand 35 ein. Somit ist auch hier eine sichere Verlötung zwischen Trennwand 35 und Trennsteg 31 gewährleistet. Die Trennwand 35 weist ferner (vgl. Fig. 4d) von ihrer Unterkante 35a abragende Lappen 39 auf, die in den Boden 36 eingreifen (vgl. Fig. 4b). Fig. 4c shows that this separation web 31 (narrow center web) has a relatively small thickness compared to the thickness of the flat tube 30. The ends of the flat tubes 30 are received in non-continuous passages 37, which are interrupted in the region of the partition wall 35. The partition wall 35 has - as in Fig. 4d clearly recognizable - from its lower edge 35a outgoing slots 38, which correspond to the contour of the narrow central webs 31 and these include (see. Fig. 4b ). The ends of the narrow central webs 31 thus project slightly beyond the bottom 36 and therefore engage in the slots 38 of the partition 35. Thus, a secure soldering between partition 35 and divider 31 is guaranteed here. The partition 35 further comprises (see. Fig. 4d ) projecting from its lower edge 35a tabs 39 which engage in the bottom 36 (see. Fig. 4b ).

Die nicht dargestellten Verbindungen zwischen dem unteren Sammelkasten 4 und dem unteren Ende der Flachrohre 14, 23, 30 sind vorzugsweise analog zu den oben beschriebenen Ausführungsbeispielen.The connections, not shown, between the lower header 4 and the lower end of the flat tubes 14, 23, 30 are preferably analogous to the embodiments described above.

Die Erfindung wurde anhand von Ausführungsbeispielen beschrieben, bei denen die Sammelkästen jeweils aus einem einteiligen Blech hergestellt sind, das derart umgeformt wird, daß zwei seiner Längsseiten die Längstrennwand des Sammelkastens bilden. Diese Ausgestaltung ist in der DE-A 198 26 881 beschrieben. Wird der Sammelkasten während der Fertigung des Wärmeübertragers in seiner Gesamtheit auf die Flachrohrenden aufgesetzt, kommen die Vorteile der Erfindung besonders zu tragen, insbesondere der Anschlag für die Rohrenden in dem Sammelkasten, da die Rohre hierdurch in ihrer Lage fixierbar sind.The invention has been described with reference to embodiments in which the collecting boxes are each made of a one-piece sheet, which is formed such that two of its longitudinal sides form the longitudinal partition wall of the collecting tank. This embodiment is in the DE-A 198 26 881 described. If the collecting tank is placed in its entirety on the flat tube ends during the manufacture of the heat exchanger, the advantages of the invention are particularly borne, in particular the stop for the tube ends in the collecting box, since the tubes are thereby fixable in their position.

Die Erfindung umfaßt jedoch auch andere Ausgestaltungsformen, wie beispielsweise Wärmeübertrager mit zweiteiligen, das heißt aus Rohrboden und Deckel bestehenden Sammelkästen.However, the invention also includes other embodiments, such as heat exchangers with two-piece, ie consisting of tube sheet and lid headers.

Claims (10)

  1. A heat exchanger, in particular an evaporator, comprising a heat exchanger network of undulated ribs and flat tubes and at least one collector divided into chambers by a longitudinal separating wall, the collector comprising a bottom having openings in which ends of the flat tubes are received, the flat tubes (14, 23, 30) being configured continuously in the direction of air flow and arranged in a row and comprising a separating web (15, 24, 31) that is aligned with the longitudinal separating walls (17, 25, 35) and extends in the longitudinal direction, characterized in that the flat tube (30) has a smaller thickness in the shape of a narrow center web (21) in the region of the separating web (31) and the longitudinal separating wall (35) has recesses (38) in which the end of the center web (31) protruding over the bottom (36) engages.
  2. The heat exchanger according to claim 1, characterized in that the width of the recess (16) corresponds to the thickness of the separating wall (17).
  3. The heat exchanger according to claim 1 or 2, characterized in that the longitudinal separating wall is soldered to the separating web.
  4. The heat exchanger according to claim 1 or 2, characterized in that the longitudinal separating wall (17) is soldered to the separating web (15) directly above the bottom (20).
  5. The heat exchanger according to claim 1, 2, 3 or 4, characterized in that the flat tubes (14) have flat tube ends (18, 19) on both sides of the recess (16), the ends being received in openings in the bottom (20).
  6. The heat exchanger according to claim 5, characterized in that the openings are configured as passages (21) which are interrupted in the region of the longitudinal separating wall (17).
  7. The heat exchanger according to claim 1, characterized in that the openings in the bottom (26) are configured as continuous passages (28) and the longitudinal separating wall (25) has recesses (27) in the region of the passages (28).
  8. The heat exchanger according to claim 1, characterized in that the longitudinal separating wall (25) has sporadic tabs (29) which are inserted through slots in the bottom (26), in particular caulked.
  9. The heat exchanger according to claim 1, characterized in that the openings in the bottom (36) are designed as interrupted passages (37), which are each connected through a slot for receiving the narrow center web.
  10. A heat exchanger according to any one of the preceding claims, characterized in that the bottom and the longitudinal separating wall of the collector are integral.
EP03747979A 2002-09-18 2003-09-08 Heat exchanger, in particular evaporator Expired - Lifetime EP1552238B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10243416A DE10243416A1 (en) 2002-09-18 2002-09-18 Heat exchanger, in particular evaporator
DE10243416 2002-09-18
PCT/EP2003/009930 WO2004029533A1 (en) 2002-09-18 2003-09-08 Heat exchanger, in particular evaporator

Publications (2)

Publication Number Publication Date
EP1552238A1 EP1552238A1 (en) 2005-07-13
EP1552238B1 true EP1552238B1 (en) 2010-07-07

Family

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Application Number Title Priority Date Filing Date
EP03747979A Expired - Lifetime EP1552238B1 (en) 2002-09-18 2003-09-08 Heat exchanger, in particular evaporator

Country Status (7)

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EP (1) EP1552238B1 (en)
JP (1) JP4348297B2 (en)
CN (1) CN100390487C (en)
AT (1) ATE473409T1 (en)
AU (1) AU2003267057A1 (en)
DE (2) DE10243416A1 (en)
WO (1) WO2004029533A1 (en)

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Publication number Priority date Publication date Assignee Title
KR100913141B1 (en) * 2004-09-15 2009-08-19 삼성전자주식회사 An evaporator using micro- channel tubes
CN102401602A (en) * 2011-11-24 2012-04-04 无锡市鑫盛换热器制造有限公司 Anti-hot-cracking type heat exchanger
CN108204635A (en) * 2018-01-17 2018-06-26 珠海格力电器股份有限公司 The connection structure and outdoor unit and air conditioner of sheet metal component

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Publication number Publication date
WO2004029533A1 (en) 2004-04-08
CN100390487C (en) 2008-05-28
JP2005539197A (en) 2005-12-22
JP4348297B2 (en) 2009-10-21
DE50312864D1 (en) 2010-08-19
CN1682090A (en) 2005-10-12
EP1552238A1 (en) 2005-07-13
ATE473409T1 (en) 2010-07-15
DE10243416A1 (en) 2004-04-01
AU2003267057A1 (en) 2004-04-19

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