WO2005066564A1 - Heat exchanger and production method therefor - Google Patents

Heat exchanger and production method therefor Download PDF

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Publication number
WO2005066564A1
WO2005066564A1 PCT/EP2004/053365 EP2004053365W WO2005066564A1 WO 2005066564 A1 WO2005066564 A1 WO 2005066564A1 EP 2004053365 W EP2004053365 W EP 2004053365W WO 2005066564 A1 WO2005066564 A1 WO 2005066564A1
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WO
WIPO (PCT)
Prior art keywords
molded part
heat exchanger
tube
carrier plate
channel
Prior art date
Application number
PCT/EP2004/053365
Other languages
German (de)
French (fr)
Inventor
Detlef Cieslik
Thorsten Kusnik
Harald Stickel
Original Assignee
BSH Bosch und Siemens Hausgeräte 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.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to AT04804740T priority Critical patent/ATE443838T1/en
Priority to DE502004010134T priority patent/DE502004010134D1/en
Priority to EP04804740A priority patent/EP1702190B1/en
Publication of WO2005066564A1 publication Critical patent/WO2005066564A1/en

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of 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
    • F25B2339/022—Evaporators constructed from a pair of plates forming a space in which is located 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/02—Fastening; Joining by using bonding materials; by embedding elements in particular materials
    • F28F2275/025—Fastening; Joining by using bonding materials; by embedding elements in particular materials by using adhesives

Definitions

  • the present invention relates to a heat exchanger, in particular an evaporator for a refrigerator, such as a household refrigerator or freezer, and a method for its production.
  • a heat exchanger which is made up of a carrier plate, a meandering tube extending over the carrier plate for a refrigerant and a heat-insulating layer of a bitumen composition.
  • the bitumen layer is first placed in the form of a plate on the arrangement of the carrier plate and the refrigerant tube and then molded with the aid of a stamp in which a meandering groove is formed on the base plate in accordance with the course of the refrigerant tube.
  • the bitumen layer has different thicknesses on opposite sides of the pipe, or the bituminous layer tears in places when it is molded onto the base plate and the refrigerant pipe. If the positional deviation is so great that the tube is no longer inside the channel, it is squeezed flat when the plunger is pressed on and the evaporator is destroyed.
  • the stroke of the stamp must be at least so large that the bitumen layer comes into contact with the carrier plate in the area between the meanders of the refrigerant pipe. If the Hüb is larger than is absolutely necessary for this, the bilumen material is driven into the gusset between the pipeline, which is elliptical in cross section, and the carrier plate.
  • the known method is therefore unusable if, instead of the bitumen plate, a plate is to be formed from a highly effective heat-insulating material, since the penetration of such a material into the gusset would impair the heat exchange between the refrigerant tube and the base plate and thus the efficiency of the evaporator ,
  • the object of the present invention is to provide a method for producing a heat exchanger which allows the production of high-quality heat exchangers even with low demands on the production tolerances, or a heat exchanger which can be produced using such a method.
  • the object is achieved according to the invention in that the molded part is made of Solating material is provided from the outset with a preformed groove running on its surface, in which the tube is placed before the carrier plate is attached to the surface. Even if the angles of curvature on the various bends of the tube differ slightly from the corresponding angles of the channel, the tube can still be inserted into the channel without difficulty by slightly elastic bending. Crushing of the pipe between the molded part and the carrier plate is thus excluded.
  • the thickness of the tube perpendicular to the surface of the molded part is initially greater than the depth of the groove formed therein, so that the tube, even if it rests on the bottom of the groove, protrudes a little from it. If now the molded part and the carrier plate are pressed against one another in order to bring at least parts of the surface of the molded part into contact with the carrier plate, the tube between the carrier plate and the molded part is simultaneously flattened, as a result of which the heat transfer between the plate and the tube is more desirable Way improved.
  • the molded part can be produced simply and economically by expanding a plastic material in a mold.
  • Polystyrene and polyurethane are particularly suitable as the plastic material to be expanded.
  • the expanded material In order to achieve a good insulation effect, a high proportion of pores in the expanded material is desirable; on the other hand, the expanded material must have sufficient strength to flatten the refrigerant pipe.
  • the molded part and the carrier plate are preferably connected by gluing, in particular with the aid of an adhesive film.
  • This adhesive film is preferably attached to the molded part, since, as an alternative to this, adhesive film attached to the carrier plate would have to be left free in each case at the regions of the carrier plate which are in contact with the refrigerant pipe, in order not to impair the heat transfer between the pipe and carrier plate.
  • Fig. 1 is a perspective view of the components of an evaporator according to the invention before they are assembled;
  • FIG. 2 shows a section through a completely assembled evaporator according to the invention.
  • a support plate of the evaporator made of aluminum with 1 a refrigerant tube with 2 and a molded part made of polystyrene foam with 3 is designated.
  • the refrigerant tube 2 has a suction line connection which is provided for connection to an inlet of a compressor in order to draw evaporated refrigerant out of the tube 2, and a capillary 5 which extends inside the suction line connection and is intended to supply liquid refrigerant from a condenser ,
  • the free end of the capillary 5 is caulked at a constriction 6 of the refrigerant tube 2. From here, the refrigerant flows through the meandering pipe 2 to a connection point 7, where it opens again on the suction line connection 4.
  • the molded part 3 is a plate made of polystyrene foam, in the top 8 of which a groove 9 is formed, the course of which corresponds to the shape of the refrigerant tube 2.
  • the depth of the channel 9 is somewhat less than the diameter of the refrigerant tube 2, which is circular in cross section before the individual components 1, 2, 3 of the evaporator are joined.
  • the density of the polystyrene foam is 40 g / dm.
  • a fast-adhering adhesive is applied to the top 8 of the molded part 3.
  • the evaporator is assembled by first inserting the refrigerant tube 2 into the channel 9 of the molded part 3.
  • the carrier plate 1 placed on the molded part 3 and the refrigerant tube initially only touches the refrigerant tube ⁇ 2.
  • the arrangement thus created is compressed between two stamps of a press (not shown).
  • the strength of the material of the molded part 3 and the wall thickness of the refrigerant tube 2 are coordinated with one another in such a way that a plastic deformation of the tube cross section occurs before the top side 8 comes into contact with the carrier plate 1.
  • the foam material may be compressed in areas of the molded part 3 at the bottom of the channel 9.
  • the force of the press is determined so that the molded part 3 cannot be compressed over its entire surface, but rather the movement of the stamp comes to a standstill when the upper side 8 touches the carrier plate 1. Penetration of the material of the molded part 3 into the gusset 11 between the refrigerant tube 2 and the carrier plate 1 is thus excluded in the example shown. Depending on the choice of density for the foamed polystyrene molded part 3, the gussets 11 can, however, also be filled with the material of the molded part 3.
  • a temperature sensor 12 for monitoring the temperature of the evaporator can be inserted into a groove 13 extending from the edge of the molded part 3 between two parallel sections of the channel 9 before or after the carrier plate 1 and molded part 3 are glued together.
  • the carrier plate 1 and molding 3 are instead using a Medicaretra g enes adhesive product using an adhesive film secured together.
  • This adhesive film is applied to the top 8 of the molded part 3 before the refrigerant tube 2 is inserted into the channel 9.
  • the refrigerant tube 2 is then placed on the adhesive film above the channel 9 and pressed into the channel 9, the adhesive film being able to tear or stretch along the channel 9, depending on the material properties.
  • the flattening of the refrigerant tube 2 and the adhering of the carrier plate 1 and the film part 3 take place in a single operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Laminated Bodies (AREA)

Abstract

A heat exchanger is produced from a supporting plate (1), a shaped part (3), which is made of a heat-insulating material and has a surface (8) with a channel (9) running along this surface (8), and from a tube (2), which is formed according to the course of the channel (9) and which is provided for a heat transfer fluid. The tube (2) is placed inside the channel (9), and the supporting plate (1) is fastened to the surface (8) provided with the tube (2).

Description

Beschreibung Wärmetauscher und Herstellungsverfahren dafür Description of heat exchanger and manufacturing process therefor
[001] Die vorliegende Erfindung betrifft einen Wärmetauscher, insbesondere einen Verdampfer für ein Kältegerät, wie etwa einen Haushaltskühl- oder -gefrierschrank, sowie ein Verfahren zu dessen Herstellung.The present invention relates to a heat exchanger, in particular an evaporator for a refrigerator, such as a household refrigerator or freezer, and a method for its production.
[002] Aus DE 102 18 826 AI ist ein Wärmetauscher bekannt, der aus einer Trägerplatte, einem sich mäanderförmig über die Trägerplatte erstreckenden Rohr für ein Kältemittel und einer wärmeisolierenden Schicht aus einer Biturnenzusammensetzung aufgebaut ist. Die Bitumenschicht wird zunächst in Form einer Platte auf die Anordnung aus Trägerplatte und Kältemittelrohr aufgelegt und dann mit Hilfe eines Stempels angeformt, in welchem eine mäanderförmige Rinne entsprechend dem Verlauf des Kältemittelrohrs auf der Basisplatte gebildet ist.From DE 102 18 826 AI a heat exchanger is known which is made up of a carrier plate, a meandering tube extending over the carrier plate for a refrigerant and a heat-insulating layer of a bitumen composition. The bitumen layer is first placed in the form of a plate on the arrangement of the carrier plate and the refrigerant tube and then molded with the aid of a stamp in which a meandering groove is formed on the base plate in accordance with the course of the refrigerant tube.
[003] Bei der Herstellung des Verdampfers muss streng darauf geachtet werden, dass das Kältemittelrohr auf der Trägerplatte exakt entsprechend dem Verlauf der Rinne des Stempels platziert wird. Wenn das Rohr nicht mittig in der Rinne zu liegen kommt, ergeben sich unterschiedliche Dicken der Bitumenschicht an einander gegenüberliegenden Seiten des Rohrs, oder die Bitaienschicht reißt beim Anformen an die Basisplatte und das Kältemittelrohr stellenweise auf. Wenn die Positionsabweichung so stark ist, dass das Rohr nicht mehr innerhalb der Rinne liegt, so wird es beim Andrücken des Stempels flach gequetscht und der Verdampfer so zerstört.In the manufacture of the evaporator, care must be taken to ensure that the refrigerant tube is placed on the carrier plate exactly in accordance with the course of the trough of the stamp. If the pipe does not come to rest in the center of the channel, the bitumen layer has different thicknesses on opposite sides of the pipe, or the bituminous layer tears in places when it is molded onto the base plate and the refrigerant pipe. If the positional deviation is so great that the tube is no longer inside the channel, it is squeezed flat when the plunger is pressed on and the evaporator is destroyed.
[004] Der Hub des Stempels muss wenigstens so groß sein, dass die Bitumenschicht im Bereich zwischen den Mäandern des Kältemittelrohrs mit der Trägerplatte in Kontakt kommt. Wenn der Hüb größer als hierfür unbedingt notwendig ist, wird das Bilu- menmaterial in die Zwickel zwischen der im Querschnitt elliptischen Rohrleitung und der Trägerplatte getrieben. Das bekannte Verfahren ist d∑her nicht brauchbar, wenn anstelle der Bitmenplatte eine Platte aus einem hochwirksam wärmeisolierenden Material angeformt werden soll, da das Eindringen eines solchen Materials in die Zwickel den Wärmeaustausch zwischen dem Kältemittelrohr und der Basisplatte und damit die Effizienz des Verdampfers beeinträchtigen würde.The stroke of the stamp must be at least so large that the bitumen layer comes into contact with the carrier plate in the area between the meanders of the refrigerant pipe. If the Hüb is larger than is absolutely necessary for this, the bilumen material is driven into the gusset between the pipeline, which is elliptical in cross section, and the carrier plate. The known method is therefore unusable if, instead of the bitumen plate, a plate is to be formed from a highly effective heat-insulating material, since the penetration of such a material into the gusset would impair the heat exchange between the refrigerant tube and the base plate and thus the efficiency of the evaporator ,
[005] Aufgabe der vorliegenden Erfindung ist, ein Verfεhren zum Herstellen eines Wärmetauschers, das die Herstellung hochwertiger Wärmetauscher auch bei geringen Anforderungen an die Herstellungstoleranzen erlaubt, bzw. einen Wärmetauscher anzugeben, der mit einem solchen Verfahren herstellbar ist.The object of the present invention is to provide a method for producing a heat exchanger which allows the production of high-quality heat exchangers even with low demands on the production tolerances, or a heat exchanger which can be produced using such a method.
[006] Die Aufgabe wird erfindungsgemäße dadurch gelöst, dass das Formteil aus wärmei- solierendem Material von vornherein mit einer auf dessen Oberfläche verlaufenden, vorgeformten Rinne bereitgestellt wird, in welcher das Rohr platziert wird, bevor die Trägerplatte an der Oberfläche befestigt wird. Auch wenn die Krümmingswinkel an den diversen Biegungen des Rohrs geringfügig von entsprechenden Winkeln der Rinne abweichen, kann das Rohr durch leichtes elastisches Biegen noch ohne Schwierigkeiten in die Rinne eingefügt werden. Ein Zerquetschen des Rohrs zwischen dem Formteil und der Trägerplatte ist so ausgeschlossen.[006] The object is achieved according to the invention in that the molded part is made of Solating material is provided from the outset with a preformed groove running on its surface, in which the tube is placed before the carrier plate is attached to the surface. Even if the angles of curvature on the various bends of the tube differ slightly from the corresponding angles of the channel, the tube can still be inserted into the channel without difficulty by slightly elastic bending. Crushing of the pipe between the molded part and the carrier plate is thus excluded.
[007] Vorzugsweise ist die Dicke des Rohrs senkrecht zu der Oberfläche des Formteils zunächst größer als die Tiefe der darin gebildeten Rinne, so dass das Rohr, auch wenn es am Boden der Rinne anliegt, ein Stück weit aus dieser herausragt. Wenn nun das Formteil und die Trägerplatte gegeneinander gedrückt werden, um wenigstens Teile der Oberfläche des Formteils mit der Trägerplatte in Kontakt zu bringen, wird gleichzeitig das Rohr zwischen der Trägerplatte und dem Formteil flachgedrückt, wodurch sich der Wärmeübergang zwischen der Platte und dem Rohr in erwünschter Weise verbessert.Preferably, the thickness of the tube perpendicular to the surface of the molded part is initially greater than the depth of the groove formed therein, so that the tube, even if it rests on the bottom of the groove, protrudes a little from it. If now the molded part and the carrier plate are pressed against one another in order to bring at least parts of the surface of the molded part into contact with the carrier plate, the tube between the carrier plate and the molded part is simultaneously flattened, as a result of which the heat transfer between the plate and the tube is more desirable Way improved.
[008] Das Formteil kann einfach und wirtschaftlich durch Expandieren eines Kunststoffmaterials in einem Formwerkzeug hergestellt werden. Als zu expandierendes Kunststoffmaterial kommen insbesondere Polystyrol und Polyurethan in Betracht.The molded part can be produced simply and economically by expanding a plastic material in a mold. Polystyrene and polyurethane are particularly suitable as the plastic material to be expanded.
[009] Um eine gute Isolationswirkung zu erzielen, ist ein hoher Porenanteil im expandierten Material wünschenswert; andererseits mtss das expandierte Material eine zum Flachdrücken des Kältemittelrohrs ausreichende Festigkeit aufweisen. Bei einem 3 Formteil aus Polystyrol hat sich eine Dichte von 30 bis 50 g/dm , vorzugsweise ca. 40 3 g/dm , als geeignet erwiesen.In order to achieve a good insulation effect, a high proportion of pores in the expanded material is desirable; on the other hand, the expanded material must have sufficient strength to flatten the refrigerant pipe. In the case of a 3 molded part made of polystyrene, a density of 30 to 50 g / dm, preferably approximately 40 3 g / dm, has proven to be suitable.
[010] Das Formteil und die Trägerplatte sind vorzugsweise durch Kleben, insbesondere mit Hilfe einer Klebefolie verbunden. Diese Klebefolie ist vorzugsweise am Formteil angebracht, da alternativ dazu an der Trägerplatte angebrachte Klebefolie jeweils an den vom Kältemittelrohr berührten Bereichen der Trägerplatte ausgespart sein müsste, um den Wärmeübergang zwischen Rohr und Trägerplatte nicht zu beeinträchtigen.The molded part and the carrier plate are preferably connected by gluing, in particular with the aid of an adhesive film. This adhesive film is preferably attached to the molded part, since, as an alternative to this, adhesive film attached to the carrier plate would have to be left free in each case at the regions of the carrier plate which are in contact with the refrigerant pipe, in order not to impair the heat transfer between the pipe and carrier plate.
[011] Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels mit Bezug auf die beigefügten Figuren. Es zeigen:[011] Further features and advantages of the invention result from the following description of an exemplary embodiment with reference to the attached figures. Show it:
[012] Fig. 1 eine perspektivische Ansicht der Komponenten eines erfindungsgemäßen Verdampfers vor ihrem Zusammenbau; undFig. 1 is a perspective view of the components of an evaporator according to the invention before they are assembled; and
[013] Fig. 2 einen Schnitt durch einen fertig zusammengebauten erfindungsgemäßen Verdampfer. [014] In Fig. 1 ist eine Trägerplatte des Verdampfers aus Aluminium mit 1, ein Kältemittelrohr mit 2 und ein Formteil aus Polystyrolschaurn mit 3 bezeichnet. Das Kältemittelrohr 2 hat einen Saugleitungsanschluss der zum Anschließen an einen Einlass eines Verdichters vorgesehen ist, um verdampftes Kältemittel aus dem Rohr 2 abzuziehen, und eine Kapillare 5, die sich im Innern des Saugleitangsanschlusses erstreckt und vorgesehen ist, utn flüssiges Kältemittel von einem Verflüssiger her zuzuführen. Das freie Ende der Kapillare 5 ist an einer Engstelle 6 des Kältemittelrohrs 2 verstemmt. Von hier aus durchfließt das Kältemittel das mäanderartig verlaufende Rohr 2 bis zu einer Anschlussstelle 7, wo es wieder auf dem Saugleitungsanschluss 4 mündet.2 shows a section through a completely assembled evaporator according to the invention. In Fig. 1, a support plate of the evaporator made of aluminum with 1, a refrigerant tube with 2 and a molded part made of polystyrene foam with 3 is designated. The refrigerant tube 2 has a suction line connection which is provided for connection to an inlet of a compressor in order to draw evaporated refrigerant out of the tube 2, and a capillary 5 which extends inside the suction line connection and is intended to supply liquid refrigerant from a condenser , The free end of the capillary 5 is caulked at a constriction 6 of the refrigerant tube 2. From here, the refrigerant flows through the meandering pipe 2 to a connection point 7, where it opens again on the suction line connection 4.
[015] Das Formteil 3 ist eine Platte aus Polystyrolschaum, in deren Oberseite 8 eine Rinne 9 gebildet ist, deren Verlauf der Gestalt des Kältemittelrohrs 2 entspricht. Die Tiefe der Rinne 9 ist etwas geringer als der Durchmesser des vor dem Zusammenfügen der einzelnen Komponenten 1, 2, 3 des Verdampfers im Querschnitt noch kreisrunden 3 Kältemittelrohrs 2. Die Dichte des Polystyrolsschaums beträgt 40 g/dm . Ein schnell haftender Klebstoff ist auf die Oberseite 8 des Formteils 3 aufgetragen.The molded part 3 is a plate made of polystyrene foam, in the top 8 of which a groove 9 is formed, the course of which corresponds to the shape of the refrigerant tube 2. The depth of the channel 9 is somewhat less than the diameter of the refrigerant tube 2, which is circular in cross section before the individual components 1, 2, 3 of the evaporator are joined. The density of the polystyrene foam is 40 g / dm. A fast-adhering adhesive is applied to the top 8 of the molded part 3.
[016] Der Verdampfer wird zusammengefügt, indem zunächst das Kältemittelrohr 2 in die Rinne 9 des Formteils 3 eingefügt wird. Die auf das Formteil 3 und das Kältemittelrohrs aufgelegte Trägerplatte 1 berührt zunächst nur das Kältemittelrohr<2. Die so geschaffene Anordnung wird zwischen zwei Stempeln einer (nicht dargestellten) Presse zusammengedrückt. Die Festigkeit des Materials des Formteils 3 und die Wandstärke des Kältemittelrohrs 2 sind so aufeinander abgestimmt, dass eine plastische Verformung des Rohrquerschnitts auftritt, bevor die Oberseite 8 mit der Trägerplatte 1 in Kontakt kommt. Dabei kann es, wie in Fig. 2 dargestellt, in Bereichen des Formteils 3 am Boden der Rinne 9 zu einer Verdichtung des Schaummaterials kommen. Die Kraft der Presse ist jedoch so festgelegt, dass das Formteil 3 nicht auf seiner ganzen Fläche gestaucht werden kann, sondern die Bewegung der Stempel zum Erliegen kommt, wenn die Oberseite 8 die Trägerplatte 1 berührt. Ein Eindringen des Materials des Formteils 3 in die Zwickel 11 zwischen dem Kältemittelrohi- 2 und der Trägerplatte 1 ist bei dem gezeigten Beispiel so ausgeschlossen. Je nach Wähl der Dichte für das geschäumte Polystyrol-Formteil 3 können die Zwickel 11 jedoch auch mit dem Material des Formteils 3 verfüllt sein.The evaporator is assembled by first inserting the refrigerant tube 2 into the channel 9 of the molded part 3. The carrier plate 1 placed on the molded part 3 and the refrigerant tube initially only touches the refrigerant tube <2. The arrangement thus created is compressed between two stamps of a press (not shown). The strength of the material of the molded part 3 and the wall thickness of the refrigerant tube 2 are coordinated with one another in such a way that a plastic deformation of the tube cross section occurs before the top side 8 comes into contact with the carrier plate 1. As shown in FIG. 2, the foam material may be compressed in areas of the molded part 3 at the bottom of the channel 9. However, the force of the press is determined so that the molded part 3 cannot be compressed over its entire surface, but rather the movement of the stamp comes to a standstill when the upper side 8 touches the carrier plate 1. Penetration of the material of the molded part 3 into the gusset 11 between the refrigerant tube 2 and the carrier plate 1 is thus excluded in the example shown. Depending on the choice of density for the foamed polystyrene molded part 3, the gussets 11 can, however, also be filled with the material of the molded part 3.
[017] Wenn die Bewegung der Presse aufhört, bleibt im Allgemeinen eine elastische Restverförmung des Kältemittelrohrs 2 zurück, so dass dieses zwischen der Trägerplatte 1 und dem Formteil 3 unter Druck steht, die Klebstoffschicht während zwischen der Oberseite 8 und der Trägerplatte 1 zugbelastet ist. Im Laufe der Alterung des Verdampfers können diese elastischen Spannungen durch eine fortschreitende Stauchung der Bereiche 10 abgebaut werden.When the movement of the press stops, an elastic residual deformation of the refrigerant tube 2 generally remains, so that this is under pressure between the carrier plate 1 and the molded part 3, the adhesive layer during is tensile between the top 8 and the support plate 1. As the evaporator ages, these elastic tensions can be reduced by progressively compressing the regions 10.
[018] Ein Temperaturfühler 12 zur Überwachung der Temperatur des Verdampfers kann in eine sich vom Rand des Formteils 3 aus zwischen zwei parallele Abschnitte der Rinne 9 erstreckende Rille 13 vor oder nach dem Zusammenkleben von Trägerplatte 1 und Formteil 3 eingefügt werden.A temperature sensor 12 for monitoring the temperature of the evaporator can be inserted into a groove 13 extending from the edge of the molded part 3 between two parallel sections of the channel 9 before or after the carrier plate 1 and molded part 3 are glued together.
[019] Einer zweiten Ausgestaltung zufolge werden Trägerplatte 1 und Formteil 3 anstatt mit Hilfe eines aufgetragenen Klebers mit Hilfe einer Klebefolie aneinander befestigt. Diese Klebefolie wird vor dem Einfügen des Kältemittelrohrs 2 in die Rinne 9 auf die Oberseite 8 des Formteils 3 aufgebracht. Das Kältemittelrohr 2 wird dann auf die Klebefolie oberhalb der Rinne 9 aufgelegt und in die Rinne 9 hineingedrückt, wobei die Klebefolie je nach Materialbeschaffenheit entlang der Rinne 9 reißen oder gedehnt werden kann. Wie bei der zuvor betrachteten Ausgestaltung finden das Abflachen des Kältemittelrohrs 2 und das Aneinanderkleben von Trägerplatte 1 und Foπnteil 3 in einem gleichen Arbeitsgang statt. [019] According to a second embodiment of the carrier plate 1 and molding 3 are instead using a aufgetra g enes adhesive product using an adhesive film secured together. This adhesive film is applied to the top 8 of the molded part 3 before the refrigerant tube 2 is inserted into the channel 9. The refrigerant tube 2 is then placed on the adhesive film above the channel 9 and pressed into the channel 9, the adhesive film being able to tear or stretch along the channel 9, depending on the material properties. As in the previously considered embodiment, the flattening of the refrigerant tube 2 and the adhering of the carrier plate 1 and the film part 3 take place in a single operation.

Claims

AnsprücheExpectations
[001] Verfahren zum Herstellen eines Wärmetauschers mit den Schritten a) Bereitstellen einer Trägerplatte (1), eines Formteils (3) aus einem wärmeisolierenden Material, das eine Oberfläche (8) mit einer auf dieser Oberfläche (8) verlaufenden Rinne (9) aufweist, und eines entsprechend dem Verlauf der Rinne (9) geformten Rohrs (2) für ein Wärmeträgerfluid, b) Platzieren des Rohrs (2) in der Rinne (9), c) Befestigen der Trägerplatte (1) an der Oberfläche (8).Method for producing a heat exchanger with the steps a) providing a carrier plate (1), a molded part (3) made of a heat-insulating material which has a surface (8) with a groove (9) running on this surface (8) , and a tube (2) for a heat transfer fluid shaped according to the course of the channel (9), b) placing the tube (2) in the channel (9), c) fastening the carrier plate (1) to the surface (8).
[002] Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Dicke des Rohrs (2) senkrecht zu der Oberfläche (8) größer ist als die Tiefe der Rinne (9), und dass das Rohr (2) zwischen der Trägerplatte (1) und dem Formteil (3) flachgedrückt wird, bis wenigstens Teile der Oberfläche (8) die Trägerplatte (1) berühren.[002] The method according to claim 1, characterized in that the thickness of the tube (2) perpendicular to the surface (8) is greater than the depth of the channel (9), and that the tube (2) between the support plate (1) and the molded part (3) is pressed flat until at least parts of the surface (8) touch the carrier plate (1).
[003] Verfäiren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Formteil (3) durch Expandieren eines Kunststoffmaterials hergestellt wird. [004] Verfäiren nach Anspruch 3, dadurch gekennzeichnet, dass das Kunst- stoffmaterial Polystyrol ist. [005] Verfäiren nach Anspruch dadurch gekennzeichnet, dass das Polystyrol auf 3 f« ~ eine Dichte von 30 bis 50 g/dm expandiert wird.Verfäiren according to claim 1 or 2, characterized in that the molded part (3) is produced by expanding a plastic material. [004] Veräiren according to claim 3, characterized in that the plastic material is polystyrene. Veräiren according to claim characterized in that the polystyrene is expanded to 3 f «~ a density of 30 to 50 g / dm.
[006] Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Befestigen durch Kleben erfolgt.[006] Method according to one of the preceding claims, characterized in that the fastening is carried out by gluing.
[007] Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die Oberfläche (8) des Formteils (3) vor dem Zusammendrücken mit einer Klebefolie versehen wird.[007] The method according to claim 6, characterized in that the surface (8) of the molded part (3) is provided with an adhesive film before being pressed together.
[008] Wärmetauscher mit einer Trägerplatte (1), einem an der Trägerplatte (1) befestigten Formteil (3) aus einem wärmeisolierenden Material, in dem an einer der Trägerplatte (1) zugewandten Oberfläche (8) eine Rinne (9) gebildet ist, in der sich ein Rohr (2) für ein Wärmeträgerfluid erstreckt, dadurch gekennzeichnet, dass die Rinne (9) an dem Formteil (3) vorgeformt und das Rohr (2) in die Rinne (9) eingefügt ist.Heat exchanger with a carrier plate (1), a molded part (3) fastened to the carrier plate (1) made of a heat-insulating material, in which a channel (9) is formed on a surface (8) facing the carrier plate (1), in which a tube (2) for a heat transfer fluid extends, characterized in that the channel (9) is preformed on the molded part (3) and the tube (2) is inserted into the channel (9).
[009] Wärmetauscher nach Anspruch 8, dadurch gekennzeichnet, dass das Rohr (2) zumindest abschnittsweise abgeflacht ist und mit der Abflachung an der Trägerplatte (1) anliegt.Heat exchanger according to claim 8, characterized in that the tube (2) is flattened at least in sections and abuts with the flattening on the carrier plate (1).
[010] Wärmetauscher nach Anspruch 9, dadurch gekennzeichnet, dass das Rohr (2) durch das wärmeisolierende Material des Formteils (3) bis zur Abflachung hin umschließt.[010] Heat exchanger according to claim 9, characterized in that the tube (2) through the heat-insulating material of the molded part (3) until it flattens.
[011] Wärmetauscher nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass das Rohr (2) zwischen der Trägerplatte (1) und dem Formteil (3) in Tiefenrichtung der Rinne (9) druckbelastet ist.[011] Heat exchanger according to one of claims 8 to 10, characterized in that the tube (2) between the carrier plate (1) and the molded part (3) in the depth direction of the channel (9) is pressure-loaded.
[012] Wärmetauscher nach Anspruch 8 oder 10, daiirch gekennzeichnet, dass das Formteil (3) aus einem expandierten Kunststoffmaterial hergestellt ist.Heat exchanger according to claim 8 or 10, characterized in that the molded part (3) is made of an expanded plastic material.
[013] Wärmetauscher nach Anspruch 12, dadurch gekennzeichnet, dass das expandierte Kunststoffmaterial am Boden der Rinne (9) verdichtet ist.[013] Heat exchanger according to claim 12, characterized in that the expanded plastic material is compressed at the bottom of the channel (9).
[014] Wärmetauscher nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass das Kunststoffmaterial Polystyrol ist.[014] Heat exchanger according to claim 12 or 13, characterized in that the plastic material is polystyrene.
[015] Wärmetauscher nach Anspruch 14 dadurch gekennzeichnet, dass das ex- 3 pandierte Polystyrol eine Dichte von 30 bis 50 g/dm hat.[015] Heat exchanger according to claim 14, characterized in that the expanded polystyrene has a density of 30 to 50 g / dm.
[016] Wärmetauscher nach einem der Ansprüche 8 bis 15, dadurch gekennzeichnet, dass Trägerplatte (1) und Formteil (3) verklebt sind.[016] Heat exchanger according to one of claims 8 to 15, characterized in that the carrier plate (1) and molded part (3) are glued.
[017] Wärmetauscher nach Anspruch 16, gekennzeichnet durch eine Klebefolie zwischen der Trägerplatte (1) und dem Formteil (3).[017] Heat exchanger according to claim 16, characterized by an adhesive film between the carrier plate (1) and the molded part (3).
[018] Wärmetauscher nach einem der Ansprüche 8 bis 17, gekennzeichnet durch eine an der Oberfläche (8) des Formteils (3) gebildete Rille (13) für einen Temperaturfühler (12). [018] Heat exchanger according to one of claims 8 to 17, characterized by a groove (13) formed on the surface (8) of the molded part (3) for a temperature sensor (12).
PCT/EP2004/053365 2003-12-23 2004-12-09 Heat exchanger and production method therefor WO2005066564A1 (en)

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AT04804740T ATE443838T1 (en) 2003-12-23 2004-12-09 HEAT EXCHANGER AND PRODUCTION PROCESS THEREOF
DE502004010134T DE502004010134D1 (en) 2003-12-23 2004-12-09 HEAT EXCHANGERS AND MANUFACTURING METHOD THEREFOR
EP04804740A EP1702190B1 (en) 2003-12-23 2004-12-09 Heat exchanger and production method therefor

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DE10360900A DE10360900A1 (en) 2003-12-23 2003-12-23 Heat exchanger and manufacturing method therefor

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CN104776648B (en) * 2015-03-17 2018-01-30 宁波日樱电器有限公司 A kind of high-efficiency evaporator that can prevent inner container of icebox from ftractureing
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CN100504261C (en) * 2005-09-22 2009-06-24 海尔集团公司 Low-temperature cabinet, low-temperature cabinet vaporizer fixing strip and fitting method
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CN100533035C (en) 2009-08-26
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RU2350872C2 (en) 2009-03-27
ATE443838T1 (en) 2009-10-15
DE502004010134D1 (en) 2009-11-05
DE10360900A1 (en) 2005-07-21
ES2332912T3 (en) 2010-02-15
RU2006120461A (en) 2008-01-27
EP1702190B1 (en) 2009-09-23

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