WO2004023049A1 - Heat exchanger-turbine assembly - Google Patents

Heat exchanger-turbine assembly Download PDF

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Publication number
WO2004023049A1
WO2004023049A1 PCT/EP2003/008008 EP0308008W WO2004023049A1 WO 2004023049 A1 WO2004023049 A1 WO 2004023049A1 EP 0308008 W EP0308008 W EP 0308008W WO 2004023049 A1 WO2004023049 A1 WO 2004023049A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
turbine
line
fan
evaporator
Prior art date
Application number
PCT/EP2003/008008
Other languages
German (de)
French (fr)
Inventor
Klaus Flinner
Georg Hausmann
Stefan Holzer
Jörg STELZER
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 EP03793627A priority Critical patent/EP1530698A1/en
Priority to AU2003257491A priority patent/AU2003257491A1/en
Publication of WO2004023049A1 publication Critical patent/WO2004023049A1/en
Priority to US11/058,083 priority patent/US20050144974A1/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
    • F25B39/022—Evaporators with plate-like or laminated elements
    • F25B39/024—Evaporators with plate-like or laminated elements with elements constructed in the shape of a hollow panel
    • 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
    • F25B11/00—Compression machines, plants or systems, using turbines, e.g. gas turbines
    • F25B11/02—Compression machines, plants or systems, using turbines, e.g. gas turbines as expanders
    • F25B11/04—Compression machines, plants or systems, using turbines, e.g. gas turbines as expanders centrifugal type
    • 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
    • F25B39/04—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F28F13/125—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation by stirring
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/14—Power generation using energy from the expansion of the refrigerant
    • F25B2400/141—Power generation using energy from the expansion of the refrigerant the extracted power is not recycled back in the refrigerant circuit
    • 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
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D2015/0291—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes comprising internal rotor means, e.g. turbine driven by the working fluid

Definitions

  • the present invention relates to a heat exchanger turbine arrangement according to the preamble of claim 1.
  • a fan which sets the second heat transfer fluid in motion along the surface of the heat exchanger.
  • refrigeration devices such as household refrigerators, freezers, etc., which have such a fan
  • the fan is usually driven by an electric motor.
  • such a fan can be used both on the evaporator and on the condenser.
  • the attachment of such an electric motor is associated with considerable effort and cost, since a supply line must be laid through the heat-insulating housing wall of the refrigerator for its power supply.
  • This housing wall is conventionally constructed from a one-piece plastic inner container and an outer wall which enclose an intermediate space which is filled with insulating foam material during the course of the manufacture of the device. In order to prevent foam from penetrating into the interior of the refrigerator at the location of a cable duct, such a duct must be carefully sealed.
  • a turbine arranged in a line through which the circulated heat transfer fluid flows is used to directly drive a fan acting on the other heat transfer fluid.
  • the turbine is arranged on a line section in front of or behind the heat exchanger.
  • the turbine housing and its connections to the line must be absolutely leakproof for the refrigerant. This makes the installation of such a turbine in a refrigeration device complex. Since such a turbine is also not a commercially available product, whereas small electric motors, which are suitable for driving a fan in a refrigeration device, are suitable for a large number of applications in huge quantities are manufactured and are accordingly inexpensive, it is difficult to provide the turbine at economical costs compared to electric motors.
  • the object of the present invention is to provide a heat exchanger / turbine arrangement which can be used economically in a refrigeration device, in particular a household refrigeration device.
  • the turbine Since the turbine is enclosed in a housing of the heat exchanger, the costs for an independent housing of the turbine and the effort for its assembly in the refrigeration device are eliminated. In extreme cases, the turbine can be reduced to an impeller on a drive shaft for the fan, bearings for the shaft can be formed directly on the housing of the heat exchanger.
  • a magnet is preferably arranged in the housing and coupled to the turbine in order to generate a rotating magnetic field outside the housing. This makes it unnecessary to lead a drive shaft for the fan out of the housing of the heat exchanger, because the fan can be driven via magnetic coupling with the aid of a second magnet which is arranged rotatably opposite this first magnet outside the housing.
  • a particular advantage of the magnetic coupling to the fan is that if the fan is mechanically blocked, the turbine in the line is not prevented from rotating, so that such a block does not simultaneously block the flow of the first heat transfer fluid in the line ,
  • the housing of the heat exchanger is preferably constructed from a flat plate and a structured plate, in which the course of the refrigerant line through the heat exchanger is formed, and the magnet is arranged on the flat wall. So it is possible to glue the heat exchanger with its flat plate to the foam side of an internal refrigerator unit and the fan to it Place the magnets of the heat exchanger opposite on the inside of the inner container.
  • the turbine can be formed simply and inexpensively with blades designed as an extruded profile.
  • a heat exchanger of the type described above can be used as a condenser or as an evaporator for a refrigerator.
  • FIG. 1 shows a perspective view of an evaporator for a refrigeration device equipped with a turbine according to the present invention
  • FIG. 2 shows a schematic radial section through the turbine from FIG. 1;
  • Fig. 3 shows an axial section through the turbine.
  • Fig. 1 shows a perspective view of an evaporator for a refrigerator as an embodiment of a heat exchanger according to the invention.
  • the evaporator 1 is constructed in a conventional manner from two soldered sheets 2, 3 made of non-magnetic, good heat-conducting material such as aluminum, a flat sheet 2, which is provided in order to be attached to an inner container of a refrigerator by adhesive on the foam side, and a sheet 3 in which a refrigerant line 4 is formed.
  • a suction line for the refrigerant is led out of the evaporator 1 at a connecting piece 5 and an injection line is introduced concentrically to the latter.
  • a turbine 6 is arranged on the evaporator 1 at a point where the narrow injection line merges into the further refrigerant line 4 of the evaporator.
  • FIGS. 2 and 3 show a section through the turbine 6 in a plane parallel to the sheets 2, 3.
  • a paddle wheel 8 is rotatably mounted such that its blades 9 are flowed against by a refrigerant jet emerging from the injection line 10 at high pressure and high speed.
  • Part of the expansion of the refrigerant conventionally achieved by capillary injection at the beginning of its passage through the evaporator is thus achieved in the evaporator 1 according to the invention in that the refrigerant flow in the turbine 6 does 8 work when driving the impeller.
  • the paddle wheel 8 has a constant cross section in the axial direction, perpendicular to the plane of FIG. 2.
  • Such a paddle wheel can be manufactured inexpensively by forming an extruded profile, e.g. made of aluminum or a plastic resistant to the refrigerant, with the cross-section of the paddle wheel, and cutting the extruded profile into slices.
  • Fig. 3 shows an axial section through the turbine 6 in the state mounted on the container inner wall 16 of a refrigerator.
  • a shaft 11 of the turbine is held by two ball bearings 12, one of which is held on an outer shell 13 and the other on a support sleeve 14, which are each fastened to the flat sheet 2 of the evaporator.
  • the outer disk 13 can be covered by the sheet 3 when the evaporator 1 is fully assembled, or it can be formed in one piece in the sheet 3.
  • a magnet 15 is attached to one end of the shaft 11 facing the flat sheet metal 2. This rotates together with the paddle wheel 8 when coolant flows against the latter.
  • a fan 17 is mounted on the inside of the container inner wall 16 in such a way that a shaft 18 thereof is aligned with the shaft 11 of the turbine 6.
  • the shaft 18 is fastened to the inner wall 16 of the container via ball bearings 12 and a carrier sleeve 19.
  • the end of the shaft 18 facing the inner wall 16 of the container carries a magnet 20 which is opposite the magnet 15 of the turbine. Due to the attraction between the magnets 15, 20 the latter tends to follow a rotation of the magnet 15 driven by the refrigerant in the turbine 6 and thus to drive the fan 17. Since between the Shafts 11, 18 of the turbine 6 and the fan 17 there is no direct mechanical coupling, there is no risk of the evaporator leaking at the turbine 6. At the same time, a blockage of the fan 17 cannot lead to the impeller 8 itself getting stuck and so on blocks the flow of refrigerant in the evaporator 1.

Abstract

The invention relates to a heat exchanger comprising a conduit for a first heat exchanger fluid and a turbine (6) that is located in said conduit and can be driven by a current of the first heat exchanger fluid. A magnet (15), which is coupled to the turbine (6) in order to generate a rotating magnetic field outside the conduit (4, 22), is located in the conduit (4).

Description

Wärmetauscher-Turbine-Anordnung Heat exchanger turbine assembly
Die vorliegende Erfindung betrifft eine Wärmetauscher-Turbine-Anordnung nach dem Oberbegriff des Anspruchs 1.The present invention relates to a heat exchanger turbine arrangement according to the preamble of claim 1.
Eine solche Anordnung ist aus FR-A-2 792 063 bekannt.Such an arrangement is known from FR-A-2 792 063.
Um den Wärmeübergang zwischen einem in einem Wärmetauscher umgewälzten ersten Wärmeträgerfluid und einem den Wärmetauscher umgebenden zweiten Wärmeträgerfluid, insbesondere Luft, zu intensivieren, ist es bekannt, einen Ventilator einzusetzen, der das zweite Wärmeträgerfluid entlang der Oberfläche des Wärmetauschers in Bewegung versetzt. Üblicherweise ist bei Kältegeräten wie etwa Haushaltskühlschränken, Gefrierschränken, etc., die über einen solchen Ventilator verfügen, der Ventilator durch einen Elektromotor angetrieben. Bei einem Kältegerät kann ein solcher Ventilator sowohl am Verdampfer als auch am Verflüssiger zum Einsatz kommen. Insbesondere beim Verdampfer ist die Anbringung eines solchen Elektromotors mit erheblichem Aufwand und Kosten verbunden, da für dessen Stromversorgung eine Versorgungsleitung durch die wärmeisolierende Gehäusewand des Kältegeräts gelegt werden muss. Diese Gehäusewand ist herkömmlicherweise aufgebaut aus einem einteiligen Kunststoff- Innenbehälter und einer Außenwand, die einen Zwischenraum umschließen, der im Laufe der Fertigung des Geräts mit isolierendem Schaummaterial ausgefüllt wird. Um zu verhindern, dass am Ort einer Leitungsdurchführung Schaum in den Innenraum des Kältegerätes eindringt, muss eine solche Durchführung sorgfältig abgedichtet werden.In order to intensify the heat transfer between a first heat transfer fluid circulated in a heat exchanger and a second heat transfer fluid, in particular air, surrounding the heat exchanger, it is known to use a fan which sets the second heat transfer fluid in motion along the surface of the heat exchanger. In refrigeration devices such as household refrigerators, freezers, etc., which have such a fan, the fan is usually driven by an electric motor. In a refrigeration device, such a fan can be used both on the evaporator and on the condenser. In particular in the case of the evaporator, the attachment of such an electric motor is associated with considerable effort and cost, since a supply line must be laid through the heat-insulating housing wall of the refrigerator for its power supply. This housing wall is conventionally constructed from a one-piece plastic inner container and an outer wall which enclose an intermediate space which is filled with insulating foam material during the course of the manufacture of the device. In order to prevent foam from penetrating into the interior of the refrigerator at the location of a cable duct, such a duct must be carefully sealed.
Bei dem aus FR-A-2 792 063 bekannten Wärmetauscher wird eine in einer von dem umgewälzten Wärmeträgerfluid durchströmten Leitung angeordnete Turbine genutzt, um einen a uf das jeweils andere Wärmeträgerfluid wirkenden Ventilator direkt anzutreiben. Die Turbine ist an einem Leitungsabschnitt vor oder hinter dem Wärmetauscher angeordnet. Das Turbinengehäuse und seine Anschlüsse an die Leitung müssen für das Kältemittel absolut dicht sein. Dies macht den Einbau einer solchen Turbine in ein Kältegerät aufwändig. Da es sich außerdem bei einer solchen Turbine nicht um ein marktgängiges Produkt handelt, wohingegen kleine Elektromotoren, die zum Antrieb eines Ventilators in einem Kältegerät geeignet sind, für eine Vielzahl von Anwendungen in riesigen Stückzahlen hergestellt werden und entsprechend preiswert sind, ist es schwierig, die Turbine zu im Vergleich zu Elektromotoren wirtschaftlichen Kosten bereitzustellen.In the heat exchanger known from FR-A-2 792 063, a turbine arranged in a line through which the circulated heat transfer fluid flows is used to directly drive a fan acting on the other heat transfer fluid. The turbine is arranged on a line section in front of or behind the heat exchanger. The turbine housing and its connections to the line must be absolutely leakproof for the refrigerant. This makes the installation of such a turbine in a refrigeration device complex. Since such a turbine is also not a commercially available product, whereas small electric motors, which are suitable for driving a fan in a refrigeration device, are suitable for a large number of applications in huge quantities are manufactured and are accordingly inexpensive, it is difficult to provide the turbine at economical costs compared to electric motors.
Aufgabe der vorliegenden Erfindung ist, eine Wärmetauscher-Turbine-Anordnung bereitzustellen, die in einem Kältegerät, insbesondere einem Haushaltskältegerät, wirtschaftlich einsetzbar ist.The object of the present invention is to provide a heat exchanger / turbine arrangement which can be used economically in a refrigeration device, in particular a household refrigeration device.
Die Aufgabe wird erfindungsgemäß gelöst durch eine Anordnung mit den Merkmalen des Anspruchs 1.The object is achieved according to the invention by an arrangement with the features of claim 1.
Da die Turbine in einem Gehäuse des Wärmetauschers eingeschlossen ist, fallen die Kosten für ein eigenständiges Gehäuse der Turbine und der Aufwand für dessen Montage im Kältegerät fort. Im Extremfall kann die Turbine auf ein Laufrad an einer Antriebswelle für den Ventilator reduziert werden, Lager für die Welle können unmittelbar am Gehäuse des Wärmetauschers ausgeformt werden.Since the turbine is enclosed in a housing of the heat exchanger, the costs for an independent housing of the turbine and the effort for its assembly in the refrigeration device are eliminated. In extreme cases, the turbine can be reduced to an impeller on a drive shaft for the fan, bearings for the shaft can be formed directly on the housing of the heat exchanger.
Vorzugsweise ist in dem Gehäuse ein Magnet angeordnet und zum Erzeugen eines rotierenden Magnetfelds außerhalb des Gehäuses an die Turbine gekoppelt. Dadurch wird es überflüssig, eine Antriebswelle für den Ventilator aus dem Gehäuse des Wärmetauschers herauszuführen, denn der Ventilator kann über Magnetkopplung mit Hilfe eines außerhalb des Gehäuses diesem ersten Magneten gegenüber drehbar angeordneten zweiten Magneten angetrieben werden. Ein besonderer Vorteil der magnetischen Kopplung an den Ventilator ist, dass im Falle einer mechanischen Blockierung des Ventilators die Turbine in der Leitung nicht an einer Drehung gehindert ist, so dass durch eine derartige Blockierung nicht gleichzeitig auch der Strom des ersten Wärmeträgerfluids in der Leitung blockiert wird.A magnet is preferably arranged in the housing and coupled to the turbine in order to generate a rotating magnetic field outside the housing. This makes it unnecessary to lead a drive shaft for the fan out of the housing of the heat exchanger, because the fan can be driven via magnetic coupling with the aid of a second magnet which is arranged rotatably opposite this first magnet outside the housing. A particular advantage of the magnetic coupling to the fan is that if the fan is mechanically blocked, the turbine in the line is not prevented from rotating, so that such a block does not simultaneously block the flow of the first heat transfer fluid in the line ,
Ferner ist vorzugsweise das Gehäuse des Wärmetauschers aus einer ebenen Platte und einer strukturierten Platte, in welcher der Verlauf der Kältemittelleitung durch den Wärmetauscher ausgeformt ist, aufgebaut, und der Magnet ist an der ebenen Wand angeordnet. So ist es möglich, den Wärmetauscher mit seiner flachen Platte an der Schaumseite eines Kältegeräte-Innenbehälters zu verkleben und den Ventilator dem Magneten des Wärmetauschers gegenüberliegend an der Innenseite des Innenbehälters zu platzieren.Furthermore, the housing of the heat exchanger is preferably constructed from a flat plate and a structured plate, in which the course of the refrigerant line through the heat exchanger is formed, and the magnet is arranged on the flat wall. So it is possible to glue the heat exchanger with its flat plate to the foam side of an internal refrigerator unit and the fan to it Place the magnets of the heat exchanger opposite on the inside of the inner container.
Die Turbine kann einfach und preiswert mit als Strangpressprofil ausgebildeten Schaufeln gebildet sein.The turbine can be formed simply and inexpensively with blades designed as an extruded profile.
Ein Wärmetauscher der oben beschriebenen Art kann als Verflüssiger oder als Verdampfer für ein Kältegerät eingesetzt werden.A heat exchanger of the type described above can be used as a condenser or as an evaporator for a refrigerator.
Weitere Merkmale und Vorteile der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen mit Bezug auf die beigefügten Figuren. Es zeigen:Further features and advantages of the present invention result from the following description of exemplary embodiments with reference to the attached figures. Show it:
Fig. 1 eine perspektivische Ansicht eines mit einer Turbine gemäß der vorliegenden Erfindung ausgestatteten Verdampfers für ein Kältegerät;1 shows a perspective view of an evaporator for a refrigeration device equipped with a turbine according to the present invention;
Fig. 2 einen schematischen radialen Schnitt durch die Turbine aus Fig. 1; undFIG. 2 shows a schematic radial section through the turbine from FIG. 1; and
Fig. 3 einen axialen Schnitt durch die Turbine.Fig. 3 shows an axial section through the turbine.
Fig. 1 zeigt eine perspektivische Ansicht eines Verdampfers für ein Kältegerät als ein Ausführungsbeispiel eines erfindungsgemäßen Wärmetauschers. Der Verdampfer 1 ist in an sich herkömmlicher Weise aufgebaut aus zwei miteinander verlöteten Blechen 2, 3 aus nichtmagnetischem, gut wärmeleitendem Material wie etwa Aluminium, einem ebenen Blech 2, das vorgesehen ist, um an einem Innenbehälter eines Kältegeräts schaumseitig durch Kleben befestigt zu werden, und einem Blech 3, in welchem eine Kältemittelleitung 4 ausgeformt ist. An einem Anschlussstutzen 5 ist eine Absaugleitung für das Kältemittel aus dem Verdampfer 1 herausgeführt und konzentrisch zu dieser eine Einspritzleitung eingeführt. Eine Turbine 6 ist an dem Verdampfer 1 an einer Stelle angeordnet, wo die schmale Einspritzleitung in die weitere Kältemittelleitung 4 des Verdampfers übergeht.Fig. 1 shows a perspective view of an evaporator for a refrigerator as an embodiment of a heat exchanger according to the invention. The evaporator 1 is constructed in a conventional manner from two soldered sheets 2, 3 made of non-magnetic, good heat-conducting material such as aluminum, a flat sheet 2, which is provided in order to be attached to an inner container of a refrigerator by adhesive on the foam side, and a sheet 3 in which a refrigerant line 4 is formed. A suction line for the refrigerant is led out of the evaporator 1 at a connecting piece 5 and an injection line is introduced concentrically to the latter. A turbine 6 is arranged on the evaporator 1 at a point where the narrow injection line merges into the further refrigerant line 4 of the evaporator.
Die Struktur der Turbine 6 ist in zwei Schnitten in Fig. 2 bzw. 3 genauer gezeigt. Fig. 2 zeigt einen Schnitt durch die Turbine 6 in einer zu den Blechen 2, 3 parallelen Ebene. In einer kreisrunden Kammer 7 ist ein Schaufelrad 8 derart drehbar gelagert, dass seine Schaufeln 9 von einem aus der Einspritzleitung 10 mit hohem Druck und hoher Geschwindigkeit austretenden Kältemittelstrahl angeströmt werden. Ein Teil der herkömmlicherweise durch Kapillareinspritzung erreichten Expansion des Kältemittels zu Beginn seines Durchgangs durch den Verdampfer wird somit beim erfindungsgemäßen Verdampfer 1 dadurch erreicht, dass die Kältemittelströmung in der Turbine 6 beim Antreiben des Schaufelrades 8 Arbeit leistet.The structure of the turbine 6 is shown in more detail in two sections in FIGS. 2 and 3. Fig. 2 shows a section through the turbine 6 in a plane parallel to the sheets 2, 3. In a circular chamber 7, a paddle wheel 8 is rotatably mounted such that its blades 9 are flowed against by a refrigerant jet emerging from the injection line 10 at high pressure and high speed. Part of the expansion of the refrigerant conventionally achieved by capillary injection at the beginning of its passage through the evaporator is thus achieved in the evaporator 1 according to the invention in that the refrigerant flow in the turbine 6 does 8 work when driving the impeller.
Das Schaufelrad 8 hat einen in axialer Richtung, senkrecht zur Ebene der Fig. 2, gleichbleibenden Querschnitt. Ein solches Schaufelrad ist preiswert herstellbar durch Formen eines Strangpressprofils, z.B. aus Aluminium oder aus einem gegen das Kältemittel beständigen Kunststoff, mit dem Querschnitt des Schaufelrades, und Schneiden des Strangpressprofils in Scheiben.The paddle wheel 8 has a constant cross section in the axial direction, perpendicular to the plane of FIG. 2. Such a paddle wheel can be manufactured inexpensively by forming an extruded profile, e.g. made of aluminum or a plastic resistant to the refrigerant, with the cross-section of the paddle wheel, and cutting the extruded profile into slices.
Fig. 3 zeigt einen axialen Schnitt durch die Turbine 6 im an der Behälterinnenwand 16 eines Kältegerätes montierten Zustand. Eine Welle 11 der Turbine ist von zwei Kugellagern 12 gehalten, von denen eines an einer äußeren Schale 13 und das andere an einer Trägermuffe 14 gehalten ist, die jeweils an dem ebenen Blech 2 des Verdampfers befestigt sind. Die äußere Scheibe 13 kann beim fertig montierten Verdampfer 1 von dem Blech 3 überdeckt sein, oder sie kann einteilig in dem Blech 3 ausgeformt sein.Fig. 3 shows an axial section through the turbine 6 in the state mounted on the container inner wall 16 of a refrigerator. A shaft 11 of the turbine is held by two ball bearings 12, one of which is held on an outer shell 13 and the other on a support sleeve 14, which are each fastened to the flat sheet 2 of the evaporator. The outer disk 13 can be covered by the sheet 3 when the evaporator 1 is fully assembled, or it can be formed in one piece in the sheet 3.
An einem dem ebenen Blech 2 zugewandten Ende der Welle 11 ist ein Magnet 15 befestigt. Dieser rotiert gemeinsam mit dem Schaufelrad 8, wenn letzteres von Kühlmittel angeströmt wird.A magnet 15 is attached to one end of the shaft 11 facing the flat sheet metal 2. This rotates together with the paddle wheel 8 when coolant flows against the latter.
An der Innenseite der Behälterinnenwand 16 ist ein Ventilator 17 so montiert, dass eine Welle 18 desselben mit der Welle 11 der Turbine 6 fluchtet. Die Welle 18 ist über Kugellager 12 und eine Trägermuffe 19 an der Behälterinnenwand 16 befestigt. Das der Behälter- innenwand 16 zugewandte Ende der Welle 18 trägt einen Magneten 20, der dem Magneten 15 der Turbine gegenüberliegt. Aufgrund der Anziehung zwischen den Magneten 15, 20 neigt letzterer dazu, einer von dem Kältemittel in der Turbine 6 angetriebenen Drehung des Magneten 15 zu folgen und so den Ventilator 17 drehanzutreiben. Da zwischen den Wellen 11 , 18 der Turbine 6 und des Ventilators 17 keine unmittelbare mechanische Kopplung vorhanden ist, besteht keine Gefahr des Undichtwerdens des Verdampfers an der Turbine 6. Gleichzeitig kann eine Blockade des Ventilators 17 nicht dazu führen, dass das Schaufelrad 8 selbst stecken bleibt und so den Strom des Kältemittels im Verdampfer 1 blockiert. A fan 17 is mounted on the inside of the container inner wall 16 in such a way that a shaft 18 thereof is aligned with the shaft 11 of the turbine 6. The shaft 18 is fastened to the inner wall 16 of the container via ball bearings 12 and a carrier sleeve 19. The end of the shaft 18 facing the inner wall 16 of the container carries a magnet 20 which is opposite the magnet 15 of the turbine. Due to the attraction between the magnets 15, 20 the latter tends to follow a rotation of the magnet 15 driven by the refrigerant in the turbine 6 and thus to drive the fan 17. Since between the Shafts 11, 18 of the turbine 6 and the fan 17 there is no direct mechanical coupling, there is no risk of the evaporator leaking at the turbine 6. At the same time, a blockage of the fan 17 cannot lead to the impeller 8 itself getting stuck and so on blocks the flow of refrigerant in the evaporator 1.

Claims

Patentansprüche claims
1. Wärmetauscher mit einer Leitung (4, 22) für ein erstes Wärmeträgerfluid und einer in der Leitung (4, 22) angeordneten, durch eine Strömung des ersten1. Heat exchanger with a line (4, 22) for a first heat transfer fluid and one in the line (4, 22) arranged by a flow of the first
Wärmeträgerfluids antreibbaren Turbine (6), dadurch gekennzeichnet, dass in der Leitung (4, 22) ein Magnet (15) angeordnet und zum Erzeugen eines rotierenden Magnetfelds außerhalb der Leitung (4, 22) an die Turbine (6) gekoppelt ist.Turbine (6) which can be driven by heat transfer fluid, characterized in that a magnet (15) is arranged in the line (4, 22) and is coupled to the turbine (6) in order to generate a rotating magnetic field outside the line (4, 22).
2. Wärmetauscher nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Turbine (6) als Strangpressprofil ausgebildete Schaufeln (9) hat.2. Heat exchanger according to claim 1 or 2, characterized in that the turbine (6) has blades (9) designed as an extruded profile.
3. Wärmetauscher nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass ein durch das rotierende Magnetfeld antreibbarer Strömungserzeuger auf ein mit der3. Heat exchanger according to claim 1 or 2, characterized in that a flow generator driven by the rotating magnetic field on a with the
Leitung (4, 22) in thermischem Kontakt stehendes zweites Wärmeträgerfluid wirkt.Line (4, 22) in thermal contact with the second heat transfer fluid acts.
4. Wärmetauscher nach Anspruch 3, dadurch gekennzeichnet, dass der Strömungserzeuger ein Ventilator (17) ist.4. Heat exchanger according to claim 3, characterized in that the flow generator is a fan (17).
5. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass er ein Verflüssiger (21) für ein Kältegerät ist.5. Heat exchanger according to one of the preceding claims, characterized in that it is a condenser (21) for a refrigerator.
6. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass er ein Verdampfer (1) für ein Kältegerät ist.6. Heat exchanger according to one of the preceding claims, characterized in that it is an evaporator (1) for a refrigerator.
7. Kältegerät, gekennzeichnet durch einen Wärmetauscher (1 , 21 ) nach einem der vorhergehenden Ansprüche. 7. Refrigeration device, characterized by a heat exchanger (1, 21) according to one of the preceding claims.
PCT/EP2003/008008 2002-08-13 2003-07-22 Heat exchanger-turbine assembly WO2004023049A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP03793627A EP1530698A1 (en) 2002-08-13 2003-07-22 Heat exchanger-turbine assembly
AU2003257491A AU2003257491A1 (en) 2002-08-13 2003-07-22 Heat exchanger-turbine assembly
US11/058,083 US20050144974A1 (en) 2002-08-13 2005-02-10 Heat exchanger-turbine assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10237133A DE10237133A1 (en) 2002-08-13 2002-08-13 Heat exchanger-turbine arrangement for use in refrigerator, especially domestic refrigerator, has magnet in fluid flow line coupled to turbine in line to generate rotating magnetic field outside line
DE10237133.4 2002-08-13

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EP (1) EP1530698A1 (en)
CN (1) CN1675508A (en)
AU (1) AU2003257491A1 (en)
DE (1) DE10237133A1 (en)
PL (1) PL373259A1 (en)
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WO (1) WO2004023049A1 (en)

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WO2010094662A3 (en) * 2009-02-17 2011-02-24 Stemke, Gudrun Evaporator and cooling device using such an evaporator

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US8516791B2 (en) * 2007-07-30 2013-08-27 General Electric Company Methods and apparatus for mixing fluid in turbine engines
US8438835B2 (en) * 2007-07-30 2013-05-14 General Electric Company Methods and apparatus for mixing fluid in turbine engines
US20090092477A1 (en) * 2007-10-08 2009-04-09 Ching-Feng Hsu Economizer for air conditioning system or the like
US20110030929A1 (en) * 2009-08-10 2011-02-10 Denso International America, Inc. Self-powered heat exchanger
US20120125575A1 (en) * 2010-11-24 2012-05-24 Tai-Her Yang Cold/heat discharge with inner fluid to actuate the external fluid pump
CN116986157B (en) * 2023-09-27 2023-12-15 山东烯泰天工节能科技有限公司 Cold air circulation device for ship-borne refrigerated container

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DE10237133A1 (en) 2004-02-26
US20050144974A1 (en) 2005-07-07
CN1675508A (en) 2005-09-28
PL373259A1 (en) 2005-08-22
EP1530698A1 (en) 2005-05-18
AU2003257491A1 (en) 2004-03-29

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