EP1756486A1 - Evaporator for a refrigerator, and method for the production thereof - Google Patents

Evaporator for a refrigerator, and method for the production thereof

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Publication number
EP1756486A1
EP1756486A1 EP05754576A EP05754576A EP1756486A1 EP 1756486 A1 EP1756486 A1 EP 1756486A1 EP 05754576 A EP05754576 A EP 05754576A EP 05754576 A EP05754576 A EP 05754576A EP 1756486 A1 EP1756486 A1 EP 1756486A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant tube
circuit board
adhesive
heat exchanger
evaporator
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
EP05754576A
Other languages
German (de)
French (fr)
Other versions
EP1756486B2 (en
EP1756486B1 (en
Inventor
Detlef Cieslik
Thorsten Kusnik
Berthold Pflomm
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1756486A1 publication Critical patent/EP1756486A1/en
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Publication of EP1756486B1 publication Critical patent/EP1756486B1/en
Publication of EP1756486B2 publication Critical patent/EP1756486B2/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F28D1/047—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 bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—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 bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F28D1/0478—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 bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag the conduits having a non-circular cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
    • F28F1/22—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • F25B2339/023—Evaporators consisting of one or several sheets on one face of which is fixed a refrigerant carrying coil
    • 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
    • F28D2021/0071—Evaporators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49359—Cooling apparatus making, e.g., air conditioner, refrigerator

Definitions

  • the present invention relates to an evaporator for a refrigerator with a circuit board, a refrigerant tube and a layer of an adhesive connecting the refrigerant tube to the circuit board, and a method for producing such an evaporator.
  • An evaporator of this type and method for its production are known from DE 109 38 773 AI.
  • a meandering bent pipe is held against a circuit board, and the spaces between the meanders of the pipe are filled with an adhesive.
  • This adhesive can be expanded PU foam or pourable thermosetting plastics.
  • a foam as an adhesive is particularly advantageous if the evaporator is to be installed as a so-called cold wall evaporator, i.e. the evaporator is embedded between an inner container of the refrigeration device and a thermal insulation layer surrounding the inner container, and heat exchange anyway only via the surface of the circuit board facing the inner container, but not via the rear side carrying the refrigerant tube is desired. Casting with non-foamed thermosetting plastic requires a considerable amount of material and is accordingly expensive.
  • the object of the present invention is to provide a method for producing a heat exchanger or a heat exchanger which can be produced using such a method and which can be used with simple means to produce an effective and reproducible heat Ensure exchange between the refrigerant tube and the carrier plate of the refrigerant tube.
  • the adhesive bead By placing the adhesive bead with the shape of the refrigerant tube adapted profile between the refrigerant tube and the circuit board, it is ensured that, with a small amount of adhesive used, a large-area contact between the latter and the refrigerant tube on the one hand or between it and the circuit board on the other hand can be produced, via which an intensive heat exchange takes place between the refrigerant tube and the circuit board.
  • the adhesive By squeezing the bead between the refrigerant tube and the circuit board, the adhesive is displaced from a direct contact area between the tube and the circuit board, so that an optimal heat transfer is possible at this point.
  • the adhesive is applied to the refrigerant tube prior to compression, since this ensures that the caterpillar comes to lie along the entire length between the refrigerant tube and the circuit board.
  • the refrigerant tube When compressing the caterpillar, the refrigerant tube is preferably flattened at the same time, so as to enlarge the area of direct contact between the refrigerant tube and the circuit board or the thickness of the adhesive layer on both sides of the contact area is as small as possible and the surfaces of the refrigerant tube and the surface wetted with the adhesive To make the board as large as possible.
  • a butyl rubber is particularly preferred as the adhesive.
  • This material is characterized by an extremely low water absorption and permeability and thus prevents moisture from collecting at the interfaces between the adhesive and the tube or the circuit board, and freezing affects the cohesion and thus the thermal conductivity of the evaporator.
  • the use of butyl rubber with its good thermal conductivity compared to other adhesives creates good heat transfer between the circuit board and the pipe carrying the refrigerant.
  • the good adhesive properties of the butyl rubber also ensure a very intensive connection between the pipe carrying the refrigerant and the carrier board connected to the pipe for the purpose of releasing the cold, as a result of which the pipe is permanently connected to the board and is mechanically very resilient.
  • butyl also enable the use of the heat exchanger in the user's access area, but above all as an evaporator in the interior of a refrigerator or freezer.
  • both flat heat exchangers such as B. so-called plate evaporator or rear wall condenser as well as spatially constructed heat exchangers such.
  • Another important advantage of this material is that it can be loaded immediately after application. It is not necessary to wait for the material to harden after being compressed, so that the residence time of the evaporators in a press used for this can be kept short and the productivity of the press is accordingly high.
  • FIG. 1 is a perspective view of a heat exchanger according to the invention, using the example of an evaporator.
  • Figs. 2 - 5 each show a schematic section through parts used to manufacture the evaporator or the finished evaporator in different phases of manufacture.
  • the evaporator shown in FIG. 1 in a perspective view is constructed from a flat circuit board 1 made of aluminum sheet, on which a refrigerant tube 2 also made of aluminum is arranged in a meandering manner. Circuit board 1 and tube 2 are held together by butyl rubber, which extends between tube 2 and circuit board 1 on both sides of a line along which. Touch tube 2 and circuit board 1 against each other.
  • Fig. 2 shows the refrigerant tube 2 and the circuit board 1 in a first stage of the manufacture of the evaporator, cut in a plane perpendicular to a straight section of the meandering tube 2.
  • three sections through the tube 2 can be seen; they are circular, and a pipe bend 4 connecting them can be seen between two of them.
  • a nozzle 5 moves along the refrigerant tube 2 and is about to apply a bead 6 made of butyl rubber.
  • the application of the caterpillar 6 has ended, and the refrigerant tube 2 together with the caterpillar lies in grooves 8 of a press mold 7, the course of which is adapted to the meandering shape of the refrigerant tube 2.
  • the cross-sectional shape of the grooves 8 corresponds approximately to half an ellipse, the cross-sectional area of the complete ellipse corresponding to that of the refrigerant tube 2.
  • Fig. 4 shows the evaporator after the pressing together of plate 1, bead 6 and refrigerant tube 2 between the die 7 and a press punch, not shown, pressed from above against the plate 1.
  • the cross-section of the refrigerant tube 2 is flattened by the pressing pressure to form an ellipse which fills the cross section of the groove 8.
  • the rubber of the caterpillar 6 is displaced in the lateral direction, so that the circuit board 1 and the refrigerant tube 2 are in a narrow strip-shaped contact zone 9, which extends over the entire length of the refrigerant tube 2, touch directly.
  • Gussets 10 formed between the circuit board 1 and the tube 2 on both sides of the contact zone 9 are filled with the rubber 3 of the caterpillar 6 and thus form two rubber bands which extend to the right and left of the refrigerant tube 2 over its entire length.
  • the butyl rubber creates a firm, resilient connection between the circuit board 1 and the refrigerant tube 2.
  • the high thermal conductivity of the rubber compared to other sealing or adhesive materials enables efficient heat exchange even between those surface areas of circuit board 1 and tube 2 that are not in be in direct contact with each other. Since the gusset 10 between the board 1 and tube 2 are free of air pockets, the cooling capacity of the evaporators according to the invention can be reproduced exactly.

Abstract

A method for producing a heat exchanger, a) a coolant pipe and a blank are provided; b) a bead that is made of a plastic adhesive is placed between the coolant pipe and the blank so as to extend in a manner that is adapted to the shape of the coolant pipe; and c) the bead located between the coolant pipe and the blank is compressed.

Description

Beschreibung Verdampfer für ein Kältegerät und Verfahren zu dessen Herstellung Description Evaporator for a refrigerator and process for its manufacture
[001] Die vorliegende Erfindung betrifft einen Verdampfer für ein Kältegerät mit einer Platine, einem Kaltemittelrohr und einer das Kaltemittelrohr mit der Platine verbindenden Lage eines Haftmittels sowie ein Verfahren zur Herstellung eines solchen Verdampfers.The present invention relates to an evaporator for a refrigerator with a circuit board, a refrigerant tube and a layer of an adhesive connecting the refrigerant tube to the circuit board, and a method for producing such an evaporator.
[002] Ein Verdampfer dieser Art und Verfahren zu seiner Herstellung sind aus DE 109 38 773 AI bekannt. Bei dem bekannten Herstellungsverfahren wird eine mäanderförmig gebogene Rohrleitung gegen eine Platine gedrückt gehalten, und die Zwischenräume zwischen den Mäandern der Rohrleitung werden mit einem Haftmittel ausgefüllt. Bei diesem Haftmittel kann es sich um expandierten PU-Schaum oder auch um gießfähige duroplastische Kunststoffe handeln. Ein Schaum als Haftmittel ist besonders vorteilhaft, wenn der Verdampfer als sogenannter Coldwall Verdampfer eingebaut werden soll, d.h. der Verdampfer zwischen einem Innenbehälter des Kältegeräts und einer den Innenbehälter umgebenden thermischen Isolationsschicht eingebettet wird, und ein Wärmeaustausch ohnehin nur über die dem Innenbehälter zugewandte Oberfläche der Platine, nicht aber über deren das Kaltemittelrohr tragende Rückseite erwünscht ist. Das Vergießen mit nicht aufgeschäumtem duroplastischem Kunststoff erfordert einen erheblichen Materialaufwand und ist dementsprechend kostspielig.An evaporator of this type and method for its production are known from DE 109 38 773 AI. In the known manufacturing process, a meandering bent pipe is held against a circuit board, and the spaces between the meanders of the pipe are filled with an adhesive. This adhesive can be expanded PU foam or pourable thermosetting plastics. A foam as an adhesive is particularly advantageous if the evaporator is to be installed as a so-called cold wall evaporator, i.e. the evaporator is embedded between an inner container of the refrigeration device and a thermal insulation layer surrounding the inner container, and heat exchange anyway only via the surface of the circuit board facing the inner container, but not via the rear side carrying the refrigerant tube is desired. Casting with non-foamed thermosetting plastic requires a considerable amount of material and is accordingly expensive.
[003] Es ist auch bekannt, das Kaltemittelrohr an der Platine mit Hilfe eines zwischen beiden angebrachten doppelseitigen Klebebandes zu befestigen. Bei dieser Technik behindert jedoch das Klebeband den Wärmeaustausch zwischen Kaltemittelrohr und Platine und beeinträchtigt so die Effizienz des Verdampfers.It is also known to attach the refrigerant tube to the circuit board with the aid of a double-sided adhesive tape attached between the two. With this technique, however, the adhesive tape hinders the heat exchange between the refrigerant tube and the circuit board and thus impairs the efficiency of the evaporator.
[004] Aus DE 102 18 826 AI ist ein Verdampfer bekannt, bei dem das Kaltemittelrohr an der Platine mit Hilfe einer Bitumenfolie befestigt ist, welche auf Platine und Kaltemittelrohr aufgelegt, erhitzt und verpresst wird, so dass das durch die Erhitzung plastische Bitumenmaterial in die zwischen der Platine und dem Kaltemittelrohr gebildeten Zwickel eindringt und für eine großflächige Haftverbindung zwischen beiden sorgt. Mit dieser Technik ist es jedoch schwierig zu gewährleisten, dass die Luft vollständig aus den Zwickeln ausgetrieben wird, so dass bestehen bleibende Lufttaschen den Wärmeaustausch beeinträchtigen und so für schwankende Effizienzen verschiedener Wärmetauscher sorgen können.From DE 102 18 826 AI an evaporator is known in which the refrigerant tube is attached to the circuit board with the aid of a bitumen film, which is placed on the circuit board and the refrigerant tube, heated and pressed, so that the plastic bitumen material heated by the in the penetrates gusset formed between the circuit board and the refrigerant tube and ensures a large-area adhesive connection between the two. With this technique, however, it is difficult to ensure that the air is completely expelled from the gussets, so that persistent air pockets impair the heat exchange and can therefore cause fluctuating efficiencies of different heat exchangers.
[005] Aufgabe der vorliegenden Erfindung ist, ein Verfahren zum Herstellen eines Wärmetauschers bzw. einen mit einem solchen Verfahren herstellbaren Wärmetauschers anzugeben, die mit einfachen Mitteln einen wirksamen und reproduzierbaren Wärme- austausch zwischen Kaltemittelrohr und Trägerplatine des Kältemittelrohres gewährleisten.The object of the present invention is to provide a method for producing a heat exchanger or a heat exchanger which can be produced using such a method and which can be used with simple means to produce an effective and reproducible heat Ensure exchange between the refrigerant tube and the carrier plate of the refrigerant tube.
[006] Die Aufgabe wird zum einen gelöst durch ein Verfahren mit den Schritten des Anspruchs 1.[006] The object is achieved on the one hand by a method having the steps of claim 1.
[007] Indem die Haftmittelraupe mit an den Verlauf des Kältemittelrohrs angepassten Verlauf zwischen dem Kaltemittelrohr und der Platine platziert wird, ist gewährleistet, dass bei geringer eingesetzter Menge an Haftmittel ein großflächiger Kontakt zwischen diesem und dem Kaltemittelrohr einerseits bzw. zwischen ihm und der Platine andererseits hergestellt werden kann, über den ein intensiver Wärmeaustausch zwischen Kaltemittelrohr und Platine stattfindet. Durch Zusammendrücken der Raupe zwischen dem Kaltemittelrohr und der Platine wird das Haftmittel aus einem unmittelbaren Kontaktbereich zwischen Rohr und Platine verdrängt, so dass an dieser Stelle ein optimaler Wärmeübergang möglich ist.By placing the adhesive bead with the shape of the refrigerant tube adapted profile between the refrigerant tube and the circuit board, it is ensured that, with a small amount of adhesive used, a large-area contact between the latter and the refrigerant tube on the one hand or between it and the circuit board on the other hand can be produced, via which an intensive heat exchange takes place between the refrigerant tube and the circuit board. By squeezing the bead between the refrigerant tube and the circuit board, the adhesive is displaced from a direct contact area between the tube and the circuit board, so that an optimal heat transfer is possible at this point.
[008] Vorzugsweise wird das Haftmittel vor dem Zusammendrücken auf das Kaltemittelrohr aufgetragen, da so gewährleistet ist, dass die Raupe auf ihrer gesamten Länge zwischen dem Kaltemittelrohr und der Platine zu liegen kommt.Preferably, the adhesive is applied to the refrigerant tube prior to compression, since this ensures that the caterpillar comes to lie along the entire length between the refrigerant tube and the circuit board.
[009] Beim Zusammendrücken der Raupe wird vorzugsweise gleichzeitig das Kaltemittelrohr mit abgeflacht, um so den Bereich unmittelbaren Kontakts zwischen dem Kaltemittelrohr und der Platine zu vergrößern bzw. die Dicke der Haftmittelschicht beiderseits des Kontaktbereichs möglichst gering und die mit dem Haftmittel benetzten Oberflächen von Kaltemittelrohr und Platine möglichst groß zu machen.When compressing the caterpillar, the refrigerant tube is preferably flattened at the same time, so as to enlarge the area of direct contact between the refrigerant tube and the circuit board or the thickness of the adhesive layer on both sides of the contact area is as small as possible and the surfaces of the refrigerant tube and the surface wetted with the adhesive To make the board as large as possible.
[010] Besonders bevorzugt als Haftmittel ist ein Butylkautschuk. Dieses Material zeichnet sich durch eine extrem geringe Wasseraufnahme und -durchlässigkeit aus und verhindert so, dass Feuchtigkeit an den Grenzflächen zwischen dem Haftmittel und dem Rohr bzw. der Platine sammelt und durch Gefrieren den Zusammenhalt und damit die Wärmeleitfähigkeit des Verdampfers beeinträchtigt. Hinzu kommt, dass durch die Verwendung von Butylkautschuk mit seinen im Vergleich zu anderen Haftmitteln guten Wärmeleiteigenschaften ein guter Wärmeübergang zwischen der Platine und dem Kältemittel führenden Rohr erzeugt ist. Die guten Klebeeigenschaften des Butyl- kautschuks stellen außerdem eine sehr intensive Verbindung zwischen dem Kältemittel führenden Rohr und der zur Kälteabgabe dienenden, mit dem Rohr verbundenen Trägerplatine sicher, wodurch das Rohr mit der Platine dauerhaft fest und mechanisch sehr belastbar verbunden ist. Die lebensmittelechten Eigenschaften von Butyl ermöglichen auch den Einsatz des Wärmetauschers im Zugriffsbereich des Benutzers, aber vor allem als Verdampfer im Innenraum eines Kühl- oder Gefriergerätes. Durch den Einsatz von Butylkautschuk als Kleber lassen sich sowohl ebene Wärmetauscher wie z. B. sogenannte Platten Verdampfer oder Rückwandverflüssiger als auch räumlich bauende Wärmetauscher wie z. B. sogenannte Kastenverdampfer und C-förmige Verdampfer sowie sogenannte Wickelverflüssiger mit gutem Fertigungserfolg in einer Großserienfertigung herstellen.A butyl rubber is particularly preferred as the adhesive. This material is characterized by an extremely low water absorption and permeability and thus prevents moisture from collecting at the interfaces between the adhesive and the tube or the circuit board, and freezing affects the cohesion and thus the thermal conductivity of the evaporator. In addition, the use of butyl rubber with its good thermal conductivity compared to other adhesives creates good heat transfer between the circuit board and the pipe carrying the refrigerant. The good adhesive properties of the butyl rubber also ensure a very intensive connection between the pipe carrying the refrigerant and the carrier board connected to the pipe for the purpose of releasing the cold, as a result of which the pipe is permanently connected to the board and is mechanically very resilient. The food-safe properties of butyl also enable the use of the heat exchanger in the user's access area, but above all as an evaporator in the interior of a refrigerator or freezer. By using butyl rubber as an adhesive, both flat heat exchangers such as B. so-called plate evaporator or rear wall condenser as well as spatially constructed heat exchangers such. B. so-called box evaporators and C-shaped Manufacture evaporators and so-called winding condensers with good manufacturing success in a large series production.
[011] Ein weiterer wichtiger Vorteil dieses Materials ist, dass es sofort nach Auftragen belastbar ist. Es ist nicht notwendig, nach dem Zusammendrücken ein Aushärten des Materials abzuwarten, so dass die Verweildauer der Verdampfer in einer hierfür verwendeten Presse kurz gehalten werden kann und die Produktivität der Presse dementsprechend hoch ist.Another important advantage of this material is that it can be loaded immediately after application. It is not necessary to wait for the material to harden after being compressed, so that the residence time of the evaporators in a press used for this can be kept short and the productivity of the press is accordingly high.
[012] Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen mit Bezug auf die beigefügten Figuren. Es zeigen:Further features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying figures. Show it:
[013] Fig. 1 eine perspektivische Ansicht eines erfindungsgemäßen Wärmetauschers, am Beispiel eines Verdampfers; und1 is a perspective view of a heat exchanger according to the invention, using the example of an evaporator; and
[014] Figs. 2 - 5 jeweils einen schematischen Schnitt durch zur Herstellung des Verdampfers verwendete Teile bzw. den fertigen Verdampfer in verschiedenen Phasen der Fertigung.Figs. 2 - 5 each show a schematic section through parts used to manufacture the evaporator or the finished evaporator in different phases of manufacture.
[015] Der in Fig. 1 in perspektivischer Ansicht gezeigte Verdampfer ist aufgebaut aus einer ebenen Platine 1 aus Aluminiumblech, auf dem ein ebenfalls aus Aluminium bestehendes Kaltemittelrohr 2 mäanderförmig angeordnet ist. Platine 1 und Rohr 2 sind zusammengehalten durch Butylkautschuk, der sich zwischen Rohr 2 und Platine 1 beiderseits einer Linie erstreckt, an der sich . Rohr 2 und Platine 1 gegenseitig berühren.The evaporator shown in FIG. 1 in a perspective view is constructed from a flat circuit board 1 made of aluminum sheet, on which a refrigerant tube 2 also made of aluminum is arranged in a meandering manner. Circuit board 1 and tube 2 are held together by butyl rubber, which extends between tube 2 and circuit board 1 on both sides of a line along which. Touch tube 2 and circuit board 1 against each other.
[016] Fig. 2 zeigt das Kaltemittelrohr 2 und die Platine 1 in einem ersten Stadium der Fertigung des Verdampfers, geschnitten in einer zu einem geradlinigen Abschnitt des mäanderartig vorgeformten Rohrs 2 senkrechten Ebene. In der Figur sind drei Schnitte durch das Rohr 2 zu sehen; sie sind kreisrund, und zwischen zweien von ihnen ist ein sie verbindender Rohrbogen 4 zu sehen. Eine Düse 5 bewegt sich am Kaltemittelrohr 2 entlang und ist im Begriff, eine Raupe 6 aus Butylkautschuk aufzutragen.Fig. 2 shows the refrigerant tube 2 and the circuit board 1 in a first stage of the manufacture of the evaporator, cut in a plane perpendicular to a straight section of the meandering tube 2. In the figure, three sections through the tube 2 can be seen; they are circular, and a pipe bend 4 connecting them can be seen between two of them. A nozzle 5 moves along the refrigerant tube 2 and is about to apply a bead 6 made of butyl rubber.
[017] Im Stadium der Fig. 3 ist das Auftragen der Raupe 6 beendet, und das Kaltemittelrohr 2 mitsamt der Raupe liegt in Rillen 8 einer Pressform 7, deren Verlauf an die Mäanderform des Kältemittelrohrs 2 angepasst ist. Die Querschnittsform der Rillen 8 entspricht ungefähr der Hälfte einer Ellipse, wobei die Querschnittsfläche der vollständigen Ellipse der des Kältemittelrohrs 2 entspricht.In the stage of FIG. 3, the application of the caterpillar 6 has ended, and the refrigerant tube 2 together with the caterpillar lies in grooves 8 of a press mold 7, the course of which is adapted to the meandering shape of the refrigerant tube 2. The cross-sectional shape of the grooves 8 corresponds approximately to half an ellipse, the cross-sectional area of the complete ellipse corresponding to that of the refrigerant tube 2.
[018] Fig. 4 zeigt den Verdampfer nach dem Zusammenpressen von Platine 1, Raupe 6 und Kaltemittelrohr 2 zwischen der Pressform 7 und einem nicht dargestellten, von oben gegen die Platine 1 gedrückten Pressstempel. Durch den Pressdruck ist das Kaltemittelrohr 2 im Querschnitt zu einer Ellipse abgeflacht, die den Querschnitt der Rille 8 ausfüllt. Der Kautschuk der Raupe 6 ist in seitlicher Richtung verdrängt, so dass Platine 1 und Kaltemittelrohr 2 sich in einer schmalen streifenförmigen Kontaktzone 9, die sich über die gesamte Länge des Kältemittelrohrs 2 erstreckt, unmittelbar berühren. Zwischen der Platine 1 und dem Rohr 2 beiderseits der Kontaktzone 9 gebildete Zwickel 10 sind mit dem Kautschuk 3 der Raupe 6 ausgefüllt und bilden so zwei Kautschukbänder, die sich rechts und links des Kältemittelrohrs 2 über dessen gesamte Länge erstrecken.Fig. 4 shows the evaporator after the pressing together of plate 1, bead 6 and refrigerant tube 2 between the die 7 and a press punch, not shown, pressed from above against the plate 1. The cross-section of the refrigerant tube 2 is flattened by the pressing pressure to form an ellipse which fills the cross section of the groove 8. The rubber of the caterpillar 6 is displaced in the lateral direction, so that the circuit board 1 and the refrigerant tube 2 are in a narrow strip-shaped contact zone 9, which extends over the entire length of the refrigerant tube 2, touch directly. Gussets 10 formed between the circuit board 1 and the tube 2 on both sides of the contact zone 9 are filled with the rubber 3 of the caterpillar 6 and thus form two rubber bands which extend to the right and left of the refrigerant tube 2 over its entire length.
[019] Fig. 5 zeigt den fertigen Verdampfer nach Entnahme aus der Pressform 7.5 shows the finished evaporator after removal from the press mold 7.
[020] Der Butylkautschuk schafft eine feste, belastbare Verbindung zwischen Platine 1 und Kaltemittelrohr 2. Die im Vergleich zu anderen Dicht- bzw. Haftmaterialien hohe Wärmeleitfähigkeit des Kautschuks ermöglicht einen effizienten Wärmeaustausch auch zwischen solchen Oberflächenbereichen von Platine 1 und Rohr 2, die nicht in unmittelbarem Kontakt miteinander stehen. Da die Zwickel 10 zwischen Platine 1 und Rohr 2 frei von Lufteinschlüssen sind, ist die Kühlleistung der erfindungsgemäßen Verdampfer exakt reproduzierbar. The butyl rubber creates a firm, resilient connection between the circuit board 1 and the refrigerant tube 2. The high thermal conductivity of the rubber compared to other sealing or adhesive materials enables efficient heat exchange even between those surface areas of circuit board 1 and tube 2 that are not in be in direct contact with each other. Since the gusset 10 between the board 1 and tube 2 are free of air pockets, the cooling capacity of the evaporators according to the invention can be reproduced exactly.

Claims

AnsprücheExpectations
[001] Verfahren zum Herstellen eines Wärmetauschers mit den Schritten: a) Bereitstellen eines Kältemittelrohres (2) und einer Platine (1); b) Platzieren einer Raupe (6) aus einem plastischen Haftmittel (3) mit an den Ver- lauf des Kältemittelrohrs (2) angepasstem Verlauf zwischen dem Kaltemittelrohr (2) und der Platine (1); und c) Zusammendrücken der Raupe (6) zwischen dem Kaltemittelrohr (2) und der Platine (1).Method for producing a heat exchanger with the steps: a) providing a refrigerant tube (2) and a circuit board (1); b) placing a bead (6) made of a plastic adhesive (3) with a course adapted to the course of the refrigerant tube (2) between the refrigerant tube (2) and the circuit board (1); and c) compressing the caterpillar (6) between the refrigerant tube (2) and the circuit board (1).
[002] Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass in Schritt b) das Haftmittel (3) auf das Kaltemittelrohr (2) aufgetragen wird.[002] The method according to claim 1, characterized in that in step b) the adhesive (3) is applied to the refrigerant tube (2).
[003] Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in Schritt a) das Kaltemittelrohr (2) mäanderartig gebogen wird.Method according to claim 1 or 2, characterized in that in step a) the refrigerant tube (2) is bent in a meandering manner.
[004] Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in Schritt c) das Kaltemittelrohr (2) abgeflacht wird.[004] Method according to one of the preceding claims, characterized in that in step c) the refrigerant tube (2) is flattened.
[005] Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Haftmittel (3) ein Butylkautschuk ist.[005] Method according to one of the preceding claims, characterized in that the adhesive (3) is a butyl rubber.
[006] Wärmetauscher für ein Kältegerät mit einer Platine (1), einem Kaltemittelrohr (2) und einer das Kaltemittelrohr (2) mit der Platine (1) verbindenden Lage eines Haftmittels (3), dadurch gekennzeichnet, dass die Haftmittellage sich strei- fenförmig entlang des Kältemittelrohrs (2) erstreckt.[006] Heat exchanger for a refrigeration device with a circuit board (1), a refrigerant tube (2) and a layer of an adhesive (3) connecting the refrigerant tube (2) to the circuit board (1), characterized in that the adhesive layer is strip-shaped extends along the refrigerant pipe (2).
[007] Wärmetauscher nach Anspruch 6, dadurch gekennzeichnet, dass die Haftmittellage zwei Stränge beiderseits einer Berührungszone (9) zwischen dem Kaltemittelrohr (2) und der Platine (1) bildet.Heat exchanger according to claim 6, characterized in that the adhesive layer forms two strands on both sides of a contact zone (9) between the refrigerant tube (2) and the circuit board (1).
[008] Wärmetauscher nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass das Kaltemittelrohr (2) einen abgeflachten Querschnitt aufweist.[008] Heat exchanger according to claim 6 or 7, characterized in that the refrigerant tube (2) has a flattened cross section.
[009] Wärmetauscher nach einem der Ansprüche 6 bis 7, dadurch gekennzeichnet, dass das Haftmittel (3) ein Butylkautschuk ist.[009] Heat exchanger according to one of claims 6 to 7, characterized in that the adhesive (3) is a butyl rubber.
[010] Wärmetauscher nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Wärmetauscher als Verdampfer oder als Verflüssiger ausgebildet ist. Heat exchanger according to one of claims 1 to 9, characterized in that the heat exchanger is designed as an evaporator or as a condenser.
EP05754576.6A 2004-06-07 2005-06-07 Evaporator for a refrigerator, and method for the production thereof Active EP1756486B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004027706A DE102004027706A1 (en) 2004-06-07 2004-06-07 Evaporator for a refrigerator and method for its production
PCT/EP2005/052602 WO2005121662A1 (en) 2004-06-07 2005-06-07 Evaporator for a refrigerator, and method for the production thereof

Publications (3)

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EP1756486A1 true EP1756486A1 (en) 2007-02-28
EP1756486B1 EP1756486B1 (en) 2011-12-07
EP1756486B2 EP1756486B2 (en) 2016-11-16

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US (1) US8701749B2 (en)
EP (1) EP1756486B2 (en)
CN (1) CN1965202A (en)
AT (1) ATE536520T1 (en)
BR (1) BRPI0511881A (en)
DE (1) DE102004027706A1 (en)
ES (1) ES2375569T3 (en)
RU (1) RU2386087C2 (en)
WO (1) WO2005121662A1 (en)

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BRPI0511881A (en) 2008-01-15
US20080066489A1 (en) 2008-03-20
DE102004027706A1 (en) 2005-12-22
EP1756486B2 (en) 2016-11-16
US8701749B2 (en) 2014-04-22
RU2386087C2 (en) 2010-04-10
CN1965202A (en) 2007-05-16
ATE536520T1 (en) 2011-12-15
WO2005121662A1 (en) 2005-12-22
ES2375569T3 (en) 2012-03-02
EP1756486B1 (en) 2011-12-07
RU2006142347A (en) 2008-07-20

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