EP2691713B1 - Refrigerator - Google Patents

Refrigerator Download PDF

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Publication number
EP2691713B1
EP2691713B1 EP12707768.3A EP12707768A EP2691713B1 EP 2691713 B1 EP2691713 B1 EP 2691713B1 EP 12707768 A EP12707768 A EP 12707768A EP 2691713 B1 EP2691713 B1 EP 2691713B1
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EP
European Patent Office
Prior art keywords
throttle
segment
refrigerator
condenser
refrigerator according
Prior art date
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EP12707768.3A
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German (de)
French (fr)
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EP2691713A2 (en
Inventor
Hans Ihle
Thomas Bischofberger
Cuma DÜLGER
Panagiotis Fotiadis
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Priority to PL12707768T priority Critical patent/PL2691713T3/en
Publication of EP2691713A2 publication Critical patent/EP2691713A2/en
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Publication of EP2691713B1 publication Critical patent/EP2691713B1/en
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    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/006—General constructional features for mounting refrigerating machinery components
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size

Definitions

  • the present invention relates to a refrigeration appliance, in particular a domestic refrigeration appliance, comprising a heat-insulating housing enclosing a storage chamber for refrigerated goods and a refrigerant circuit comprising a compressor, a condenser, a throttle and an evaporator cooling the storage chamber.
  • a refrigeration appliance in particular a domestic refrigeration appliance, comprising a heat-insulating housing enclosing a storage chamber for refrigerated goods and a refrigerant circuit comprising a compressor, a condenser, a throttle and an evaporator cooling the storage chamber.
  • adiabatic cooling depends on the pressure difference passed between condenser and evaporator. The warmer the refrigerant is at the outlet of the condenser, the warmer it gets even after the expansion in the evaporator. Theoretically, while it is possible for the temperature of the refrigerant at the condenser outlet to be as close as possible to the temperature of the environment to which the condenser gives off its heat, the smaller the temperature difference, the greater the required condenser size. Cooling achievable at the condenser is also limited by parasitic heat transfer between warm, upstream regions of the condenser and cooler downstream regions. When a downstream portion of the condenser is surrounded by air already heated at upstream portions of the condenser, it can no longer cool the refrigerant below the temperature of that air.
  • a frame heater is provided to prevent condensation on the housing in the vicinity of a mounted between the body and door of the housing seal.
  • a frame heater comprises a tube which is inserted in the refrigerant circuit between compressor and condenser or downstream of the condenser to heat with the heat of compression of the refrigerant, the condensation-prone surfaces of the housing above the dew point. Since the condensation hazard of the thermal coupling If these surfaces are due to the cooled storage chamber, the heat released by the frame heating ultimately also flows to a considerable extent into the storage chamber, thereby burdening the energy efficiency of the refrigeration appliance.
  • US Pat. No. 2,515,212 discloses a refrigerator in which a throttle is provided for the realization of different temperatures in the series-connected evaporators of a normal refrigeration compartment and a freezer compartment between the evaporators.
  • the throttle extends along a rear wall of the device in contact with a condenser conduit laid along the rear wall
  • US Pat. No. 2,515,212 discloses a refrigerator according to the preamble of claim 1.
  • Object of the present invention is to improve the energy efficiency of a refrigerator, in particular a household appliance.
  • a refrigeration device characterized in that in a refrigerator of the type defined above, the throttle is at least partially disposed on a side wall of the housing between an outer skin and an insulating layer thereof.
  • the throttle contributes little to the volume of the refrigerant circuit due to its small compared to other areas of the refrigerant circuit free cross section and therefore does not appreciably increase the amount of refrigerant required to operate the refrigerant circuit.
  • Due to the arrangement on the side wall the throttle is protected against waste heat released by the condenser, which is generally arranged at the back of the device.
  • the side wall is therefore a relatively cool region of the refrigerator housing and allows for effective additional cooling of the circulating through the throttle refrigerant.
  • the throttle is preferably protected and not visible from the outside arranged in the side wall.
  • the outer skin of the side wall is preferably metallic.
  • the choke is preferably glued to the outer skin to ensure that it remains in heat-conducting contact with the outer skin when the insulating layer is applied during assembly of the refrigerator.
  • the insulating layer is formed in in the usual way, preferably by expanding synthetic resin foam in a cavity bounded by the outer skin of the housing.
  • an upstream section of the throttle is arranged on the side wall.
  • a downstream portion of the throttle may be routed in a manner known per se in a suction pipe leading from the evaporator to the compressor.
  • this upstream portion In order to keep the pressure drop of the refrigerant at least in the upstream portion of the throttle small, this preferably has a larger cross-section than the downstream portion. Since this upstream portion is not intended to substantially increase the volume of the refrigerant circuit, it is preferable that the upstream portion has a free diameter of less than 1 millimeter.
  • the upstream portion preferably has a length of at least 1 meter.
  • the length of the upstream section will be up to 2 meters.
  • downstream portion and the upstream portion of the condenser are joined together outside of an insulating layer of the side wall.
  • the refrigerant circuit has a dryer whose feed line for refrigerant is fluidically connected to the upstream end of the throttle on the side wall.
  • FIGS 1 and 2 show perspective views of a household refrigeration appliance 1 in table construction.
  • a heat-insulating housing of the device is composed of a substantially cuboidal body 2 and a door 3, which together define a storage chamber 4.
  • the body 2 has a known construction with a deep-drawn plastic inner container 5, a composite of several elements together outer skin and an intermediate space between the inner container 5 and the outer skin filling insulating polyurethane foam.
  • the elements of the outer skin include two sheet-metal blanks 6 each extending over a side wall of the body 2 and connected to the inner container 5 on a front frame 7 of the body 2 facing the door 3.
  • a machine room 8 is recessed near the bottom, which receives a refrigerant compressor 9.
  • a condenser 10 is connected to a pressure port of the compressor 9.
  • the condenser 10 is in Fig. 2 as a wire tube heat exchanger mounted on a rear wall of the body 2 above the engine room 8; Other constructions of the condenser 10, in particular as a compact, likewise accommodated in the machine room 8 and forcibly cooled by a fan finned heat exchanger are also considered.
  • a downstream connection of the condenser 10 is connected via a sleeve 11 with a throttle tube 12 which extends in a loop shape on the inside of one of the sheet-metal blanks 6 facing the insulating layer.
  • the sleeves 11, 16 make it possible to assemble the device 1 by, before the sheet metal blanks 6 are assembled with the inner container to attach the throttle 12 to one of the sheet metal blanks 6, the body 2 together so that the ends of the throttle 12 in the engine room lie free, then froth the body and finally to insert the throttle 12 with the aid of the sleeves 11, 16 in the refrigerant circuit.
  • Fig. 3 shows a perspective view of the inside of the sheet metal blank 6 with the throttle tube 12.
  • the blank 6 comprises a flat central plate 13, which is provided to form the outer skin of a side wall of the body 2, and at which the throttle tube 12 by means of adhesive tape strip fourteenth is attached. Angled from the central plate 13 webs 15 extend in the assembled device 1 on the front frame 7 and its back, and there are foam-tight connected to the inner container 5 and a (not shown) rear wall panel.
  • a second sleeve 16 disposed in the engine room 8 connects the throttle tube 12 to a second, narrower throttle tube 17 that intersects the insulating layer of the body 2 to provide an evaporator 18 in close thermal contact with the bearing chamber 4.
  • the throttle tube 17 is guided directly on the surface of a suction pipe 19, which leads from the evaporator 18 to the compressor 9, or within this intake manifold 19.
  • the volume of the entire refrigerant loop changes little, compared to a conventional one, despite a length of the choke tube 12 of typically 1 to 2 meters Refrigerant circuit of a refrigerator of the same size, and accordingly, the amount of circulating refrigerant required for efficient operation changes little.
  • the throttle tube 12 extends on the central plate 13 at a distance from the web 15 connected to the inner container 5, the heat flow from the throttle tube 12 to the storage chamber 4 via the connection between the sheet metal blank 6 and the inner container 5 is negligible. Due to the spatial distance from the condenser 10, the throttle tube 12 is shielded from heat emitted by the condenser 10. Therefore, with the throttle tube 12, a greater cooling of the refrigerant can be achieved than by an enlargement of the condenser 10 by the volume of the throttle tube 12.
  • the device 1 is positioned so that the side wall containing the throttle tube 12 is exposed, so that emitted from the throttle tube 12 heat quickly to the Environment can be given further.
  • the invention is applicable, albeit to a small extent, but also in refrigeration device with hidden side wall such as a built-in appliance or a laterally flanked by other objects table device.
  • the sheet metal blank 6 acts as a heat accumulator that receives heat from the throttle tube 12 as long as the compressor 9 is in operation and drives the circulation of refrigerant. In a subsequent standstill phase of the compressor, the heat of the sheet metal blank 6 can be distributed to the environment even in such a refrigeration device.

Description

Die vorliegende Erfindung betrifft ein Kältegerät, insbesondere ein Haushaltskältegerät, mit einem eine Lagerkammer für Kühlgut umschließenden wärmeisolierenden Gehäuse und einem Kältemittelkreis, der einen Verdichter, einen Verflüssiger, eine Drossel und einen die Lagerkammer kühlenden Verdampfer umfasst. Die Wirkung eines solchen bekannten Kältegeräts basiert darauf, dass der Verdichter dampfförmiges Kältemittel aus dem Verdampfer absaugt, verdichtet und das durch die Verdichtung adiabatisch erwärmte Kältemittel dem Verflüssiger zuführt, wo es unter Abgabe von Wärme kondensiert. Das dabei erhaltene flüssige Kältemittel entspannt sich beim Durchgang durch die Drossel und gelangt adiabatisch abgekühlt wieder zum Verdampfer.The present invention relates to a refrigeration appliance, in particular a domestic refrigeration appliance, comprising a heat-insulating housing enclosing a storage chamber for refrigerated goods and a refrigerant circuit comprising a compressor, a condenser, a throttle and an evaporator cooling the storage chamber. The effect of such a known refrigeration device based on the fact that the compressor sucks vaporized refrigerant from the evaporator, and compresses the adiabatically heated by the compression refrigerant to the condenser, where it condenses while releasing heat. The resulting liquid refrigerant relaxes when passing through the throttle and adiabatically cooled returns to the evaporator.

Das Ausmaß der adiabatischen Abkühlung hängt ab von der zwischen Verflüssiger und Verdampfer durchlaufenen Druckdifferenz. Je wärmer das Kältemittel am Ausgang des Verflüssigers ist, umso wärmer gelangt es auch nach der Entspannung in den Verdampfer. Theoretisch ist es zwar möglich, die Temperatur des Kältemittels am Ausgang des Verflüssigers beliebig nah an die Temperatur der Umgebung, an die der Verflüssiger seine Wärme abgibt, anzunähern, doch sind die erforderlichen Abmessungen des Verflüssigers umso größer, je geringer diese Temperaturdifferenz sein soll. Die am Verflüssiger erreichbare Abkühlung ist außerdem durch parasitäre Wärmeübertragung zwischen warmen, stromaufwärtigen Bereichen des Verflüssigers und kühleren stromabwärtigen Bereichen eingeschränkt. Wenn ein stromabwärtiger Bereich des Verflüssigers von Luft umspült ist, die bereits an stromaufwärtigen Bereichen des Verflüssigers erwärmt ist, kann er das Kältemittel nicht mehr unter die Temperatur dieser Luft abkühlen.The extent of adiabatic cooling depends on the pressure difference passed between condenser and evaporator. The warmer the refrigerant is at the outlet of the condenser, the warmer it gets even after the expansion in the evaporator. Theoretically, while it is possible for the temperature of the refrigerant at the condenser outlet to be as close as possible to the temperature of the environment to which the condenser gives off its heat, the smaller the temperature difference, the greater the required condenser size. Cooling achievable at the condenser is also limited by parasitic heat transfer between warm, upstream regions of the condenser and cooler downstream regions. When a downstream portion of the condenser is surrounded by air already heated at upstream portions of the condenser, it can no longer cool the refrigerant below the temperature of that air.

Es sind Kältegeräte bekannt, bei denen eine Rahmenheizung zur Verhinderung von Kondensation am Gehäuse in der Umgebung einer zwischen Korpus und Tür des Gehäuses angebrachten Dichtung vorgesehen ist. Eine solche Rahmenheizung umfasst ein Rohr, das in den Kältemittelkreislauf zwischen Verdichter und Verflüssiger oder stromabwärts vom Verflüssiger eingefügt ist, um mit der Kompressionswärme des Kältemittels die kondensationsgefährdeten Oberflächen des Gehäuses über den Taupunkt zu erwärmen. Da die Kondensationsgefährdung von der thermischen Kopplung dieser Oberflächen an die gekühlte Lagerkammer herrührt, fließt letztlich auch die von der Rahmenheizung frei gesetzte Wärme zu einem beträchtlichen Teil in die Lagerkammer und belastet so die Energieeffizienz des Kältegeräts.There are refrigerators are known in which a frame heater is provided to prevent condensation on the housing in the vicinity of a mounted between the body and door of the housing seal. Such a frame heater comprises a tube which is inserted in the refrigerant circuit between compressor and condenser or downstream of the condenser to heat with the heat of compression of the refrigerant, the condensation-prone surfaces of the housing above the dew point. Since the condensation hazard of the thermal coupling If these surfaces are due to the cooled storage chamber, the heat released by the frame heating ultimately also flows to a considerable extent into the storage chamber, thereby burdening the energy efficiency of the refrigeration appliance.

US 2 515 212 A offenbart ein Kältegerät, bei dem zur Realisierung unterschiedlicher Temperaturen in den in Reihe verbundenen Verdampfern eines Normalkühlfachs und eines Gefrierfachs zwischen den Verdampfern eine Drossel vorgesehen ist. Um eine Trennwand zwischen das Normalkühlfach und das Gefrierfach umgebenden Isolationsmaterialschichten zu überwinden, verläuft die Drossel entlang einer Rückwand des Geräts in Kontakt mit einer entlang der Rückwand verlegten Verflüssigerleitung US 2 515 212 A offenbart ein Kältegerät gemäß dem Oberbegriff des Anspruchs 1. US Pat. No. 2,515,212 discloses a refrigerator in which a throttle is provided for the realization of different temperatures in the series-connected evaporators of a normal refrigeration compartment and a freezer compartment between the evaporators. In order to overcome a partition wall between insulation material layers surrounding the normal cooling compartment and the freezer compartment, the throttle extends along a rear wall of the device in contact with a condenser conduit laid along the rear wall US Pat. No. 2,515,212 discloses a refrigerator according to the preamble of claim 1.

Aufgabe der vorliegenden Erfindung ist, die Energieeffizienz eines Kältegeräts, insbesondere eines Haushaltsgeräts, zu verbessern.Object of the present invention is to improve the energy efficiency of a refrigerator, in particular a household appliance.

Die Aufgabe wird durch ein Kältegerät gemäß Anspruch 1 gelöst, indem bei einem Kältegerät vom eingangs definierten Typ die Drossel wenigstens teilweise an einer Seitenwand des Gehäuses zwischen einer Außenhaut und einer Isolierschicht derselben angeordnet ist. Die Drossel trägt aufgrund ihres im Vergleich zu anderen Bereichen des Kältemittelkreislaufs kleinen freien Querschnitts wenig zum Volumen des Kältemittelkreises bei und erhöht daher nicht nennenswert die Menge des zum Betreiben des Kältemittelkreises benötigten Kältemittels. Durch die Anordnung an der Seitenwand ist die Drossel vor Abwärme, die der im Allgemeinen an der Geräterückseite angeordnete Verflüssiger frei setzt, geschützt. Die Seitenwand ist daher ein relativ kühler Bereich des Kältegerätegehäuses und ermöglicht eine wirksame zusätzliche Abkühlung des durch die Drossel zirkulierenden Kältemittels.The object is achieved by a refrigeration device according to claim 1, characterized in that in a refrigerator of the type defined above, the throttle is at least partially disposed on a side wall of the housing between an outer skin and an insulating layer thereof. The throttle contributes little to the volume of the refrigerant circuit due to its small compared to other areas of the refrigerant circuit free cross section and therefore does not appreciably increase the amount of refrigerant required to operate the refrigerant circuit. Due to the arrangement on the side wall, the throttle is protected against waste heat released by the condenser, which is generally arranged at the back of the device. The side wall is therefore a relatively cool region of the refrigerator housing and allows for effective additional cooling of the circulating through the throttle refrigerant.

Die Drossel ist vorzugsweise geschützt und von außen nicht sichtbar in der Seitenwand angeordnet. Um die Wärme der Drossel schnell aufnehmen und weiterleiten zu können, ist die Außenhaut der Seitenwand vorzugsweise metallisch.The throttle is preferably protected and not visible from the outside arranged in the side wall. In order to absorb and forward the heat of the throttle quickly, the outer skin of the side wall is preferably metallic.

Die Drossel ist an der Außenhaut vorzugsweise verklebt, um sicher zu stellen, dass sie in wärmeleitendem Kontakt mit der Außenhaut bleibt, wenn im Laufe des Zusammenbaus des Kältegeräts die Isolierschicht angebracht wird. Die Isolierschicht entsteht in fachüblicher Weise vorzugsweise durch Expandierenlassen von Kunstharzschaum in einem von der Außenhaut begrenzten Hohlraum des Gehäuses.The choke is preferably glued to the outer skin to ensure that it remains in heat-conducting contact with the outer skin when the insulating layer is applied during assembly of the refrigerator. The insulating layer is formed in in the usual way, preferably by expanding synthetic resin foam in a cavity bounded by the outer skin of the housing.

Eine schnelle und einfache Verklebung der Drossel und der Außenhaut ist mit Hilfe von Klebeband möglich.A quick and easy bonding of the throttle and the outer skin is possible with the help of adhesive tape.

Um zu verhindern, dass über die Drossel Wärme in den Verdampfer eingetragen wird, ist vorzugsweise nur ein stromaufwärtiger Abschnitt der Drossel an der Seitenwand angeordnet.In order to prevent heat from being introduced into the evaporator via the throttle, preferably only an upstream section of the throttle is arranged on the side wall.

Ein stromabwärtiger Abschnitt der Drossel kann stattdessen in an sich bekannter Weise in einem vom Verdampfer zum Verdichter führenden Saugrohr verlegt sein.Instead, a downstream portion of the throttle may be routed in a manner known per se in a suction pipe leading from the evaporator to the compressor.

Um den Druckabfall des Kältemittels zumindest im stromaufwärtigen Abschnitt der Drossel gering zu halten, hat dieser vorzugsweise einen größeren Querschnitt als der stromabwärtige Abschnitt. Da dieser stromaufwärtige Abschnitt das Volumen des Kältemittelkreises nicht wesentlich erhöhen soll, ist bevorzugt, dass der stromaufwärtige Abschnitt einen freien Durchmesser von weniger als 1 Millimeter hat.In order to keep the pressure drop of the refrigerant at least in the upstream portion of the throttle small, this preferably has a larger cross-section than the downstream portion. Since this upstream portion is not intended to substantially increase the volume of the refrigerant circuit, it is preferable that the upstream portion has a free diameter of less than 1 millimeter.

Um eine wirksame Kühlung des Kältemittels zwischen seinem Austritt aus dem Verflüssiger und dem Eintritt in den Verdampfer zu ermöglichen, hat der stromaufwärtige Abschnitt vorzugsweise eine Länge von wenigstens 1 Meter. In der Praxis wird bei einem normal großen Haushaltskältegerät die Länge des stromaufwärtigen Abschnitts bis zu 2 Meter betragen.In order to allow efficient cooling of the refrigerant between its exit from the condenser and entry into the evaporator, the upstream portion preferably has a length of at least 1 meter. In practice, with a normal size household refrigerator, the length of the upstream section will be up to 2 meters.

Für den Zusammenbau des Kältegeräts ist es zweckmäßig, wenn der stromabwärtige Abschnitt und der stromaufwärtige Abschnitt des Verflüssigers außerhalb einer Isolierschicht der Seitenwand aneinander gefügt sind.For the assembly of the refrigerator, it is useful if the downstream portion and the upstream portion of the condenser are joined together outside of an insulating layer of the side wall.

Bevorzugt weist der Kältemittelkreis einen Trockner auf, dessen Zuleitung für Kältemittel mit dem stromaufwärtigen Ende der Drossel an der Seitenwand strömungstechnisch verbunden ist.Preferably, the refrigerant circuit has a dryer whose feed line for refrigerant is fluidically connected to the upstream end of the throttle on the side wall.

Weitere Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die beigefügten Figuren. Es zeigen:

Fig. 1
eine perspektivische Ansicht eines erfindungsgemäßen Haushaltskältegeräts von vorn;
Fig. 2
eine perspektivische Ansicht des Kältegeräts von hinten;
Fig. 3
eine Draufsicht auf ein eine Außenhaut einer Seitenwand des Kältegeräts bildenden Blechzuschnitt mit einem daran befestigten Drosselabschnitt; und
Fig. 4
ein Schema des Kältemittelkreislaufs des Kältegeräts.
Further advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying figures. Show it:
Fig. 1
a perspective view of a household refrigerator according to the invention from the front;
Fig. 2
a perspective view of the refrigerator from behind;
Fig. 3
a plan view of an outer skin of a side wall of the refrigerator forming sheet metal blank with a throttle section attached thereto; and
Fig. 4
a diagram of the refrigerant circuit of the refrigerator.

Figuren 1 und 2 zeigen perspektivische Ansichten eines Haushaltskältegeräts 1 in Tischbauweise. Ein wärmeisolierendes Gehäuse des Geräts setzt sich zusammen aus einem im Wesentlichen quaderförmigen Korpus 2 und einer Tür 3, die gemeinsam eine Lagerkammer 4 begrenzen. Der Korpus 2 hat einen an sich bekannten Aufbau mit einem aus Kunststoff tiefgezogenen Innenbehälter 5, einer aus mehreren Elementen zusammen gefügten Außenhaut und einer einen Zwischenraum zwischen dem Innenbehälter 5 und der Außenhaut ausfüllenden Isolierschicht aus Polyurethanschaum. Zu den Elementen der Außenhaut gehören zwei sich jeweils über eine Seitenwand des Korpus 2 erstreckende Blechzuschnitte 6, die mit dem Innenbehälter 5 an einem der Tür 3 zugewandten vorderen Rahmen 7 des Korpus 2 verbunden sind. Figures 1 and 2 show perspective views of a household refrigeration appliance 1 in table construction. A heat-insulating housing of the device is composed of a substantially cuboidal body 2 and a door 3, which together define a storage chamber 4. The body 2 has a known construction with a deep-drawn plastic inner container 5, a composite of several elements together outer skin and an intermediate space between the inner container 5 and the outer skin filling insulating polyurethane foam. The elements of the outer skin include two sheet-metal blanks 6 each extending over a side wall of the body 2 and connected to the inner container 5 on a front frame 7 of the body 2 facing the door 3.

An der Rückseite des Korpus 2 ist in Bodennähe ein Maschinenraum 8 ausgespart, der einen Kältemittel-Verdichter 9 aufnimmt. Ein Verflüssiger 10 ist an einem Druckanschluss des Verdichters 9 angeschlossen. Der Verflüssiger 10 ist in Fig. 2 als ein an einer Rückwand des Korpus 2 über dem Maschinenraum 8 montierter Drahtrohr-Wärmetauscher dargestellt; andere Bauformen des Verflüssigers 10, insbesondere als kompakter, ebenfalls im Maschinenraum 8 untergebrachter und durch einen Ventilator zwangsgekühlter Lamellen-Wärmetauscher kommen ebenfalls in Betracht. Ein stromabwärtiger Anschluss des Verflüssigers 10 ist über eine Muffe 11 mit einem Drosselrohr 12 verbunden, das sich schleifenförmig auf der der Isolierschicht zugewandten Innenseite eines der Blechzuschnitte 6 erstreckt.At the back of the body 2, a machine room 8 is recessed near the bottom, which receives a refrigerant compressor 9. A condenser 10 is connected to a pressure port of the compressor 9. The condenser 10 is in Fig. 2 as a wire tube heat exchanger mounted on a rear wall of the body 2 above the engine room 8; Other constructions of the condenser 10, in particular as a compact, likewise accommodated in the machine room 8 and forcibly cooled by a fan finned heat exchanger are also considered. A downstream connection of the condenser 10 is connected via a sleeve 11 with a throttle tube 12 which extends in a loop shape on the inside of one of the sheet-metal blanks 6 facing the insulating layer.

Die Muffen 11, 16 ermöglichen, das Gerät 1 zusammenzubauen, indem, bevor die Blechzuschnitte 6 mit dem Innenbehälter zusammengefügt werden, die Drossel 12 an einem der Blechzuschnitte 6 zu befestigen, den Korpus 2 so zusammenzufügen, dass die Enden der Drossel 12 im Maschinenraum 8 frei liegen, dann den Korpus auszuschäumen und schließlich die Drossel 12 mit Hilfe der Muffen 11, 16 in den Kältemittelkreislauf einzufügen.The sleeves 11, 16 make it possible to assemble the device 1 by, before the sheet metal blanks 6 are assembled with the inner container to attach the throttle 12 to one of the sheet metal blanks 6, the body 2 together so that the ends of the throttle 12 in the engine room lie free, then froth the body and finally to insert the throttle 12 with the aid of the sleeves 11, 16 in the refrigerant circuit.

Fig. 3 zeigt eine perspektivische Ansicht der Innenseite des Blechzuschnitts 6 mit dem Drosselrohr 12. Der Zuschnitt 6 umfasst eine ebene zentrale Platte 13, die vorgesehen ist, um die Außenhaut einer Seitenwand des Korpus 2 zu bilden, und an der das Drosselrohr 12 mit Hilfe von Klebebandstreifen 14 befestigt ist. Von der zentralen Platte 13 abgewinkelte Stege 15 erstrecken sich beim fertig montierten Gerät 1 auf dessen vorderen Rahmen 7 beziehungsweise seine Rückseite, und sind dort mit dem Innenbehälter 5 beziehungsweise einer (nicht dargestellten) Rückwandplatte schaumdicht verbunden. Fig. 3 shows a perspective view of the inside of the sheet metal blank 6 with the throttle tube 12. The blank 6 comprises a flat central plate 13, which is provided to form the outer skin of a side wall of the body 2, and at which the throttle tube 12 by means of adhesive tape strip fourteenth is attached. Angled from the central plate 13 webs 15 extend in the assembled device 1 on the front frame 7 and its back, and there are foam-tight connected to the inner container 5 and a (not shown) rear wall panel.

Wiederum bezogen auf Fig. 1 verbindet eine zweite im Maschinenraum 8 angeordnete Muffe 16 das Drosselrohr 12 mit einem zweiten, engeren Drosselrohr 17, das die Isolierschicht des Korpus 2 kreuzt, um einen in engem thermischen Kontakt mit der Lagerkammer 4 angeordneten Verdampfer 18 zu versorgen. Wie in Fig. 4 schematisch zu erkennen, ist das Drosselrohr 17 unmittelbar an der Oberfläche eines Saugrohrs 19, das vom Verdampfer 18 zum Verdichter 9 führt, oder innerhalb dieses Saugrohrs 19 geführt.Again referring to Fig. 1 a second sleeve 16 disposed in the engine room 8 connects the throttle tube 12 to a second, narrower throttle tube 17 that intersects the insulating layer of the body 2 to provide an evaporator 18 in close thermal contact with the bearing chamber 4. As in Fig. 4 can be seen schematically, the throttle tube 17 is guided directly on the surface of a suction pipe 19, which leads from the evaporator 18 to the compressor 9, or within this intake manifold 19.

Indem für das Drosselrohr 12 ein Rohr mit geringem Innendurchmesser, typischerweise ca. 0,8 Millimeter, verwendet wird, ändert sich - trotz einer Länge des Drosselrohrs 12 von typischerweise 1 bis 2 Meter - das Volumen des gesamten Kältemittelkreislaufs nur wenig im Vergleich zu einem herkömmlichen Kältemittelkreislauf eines Kältegeräts gleicher Größe, und dementsprechend ändert sich auch die für einen effizienten Betrieb benötigte Menge an zirkulierendem Kältemittel wenig. Da das Drosselrohr 12 auf der zentralen Platte 13 beabstandet von dem mit dem Innenbehälter 5 verbundenen Steg 15 verläuft, ist der Wärmefluss vom Drosselrohr 12 zur Lagerkammer 4 über die Verbindung zwischen Blechzuschnitt 6 und Innenbehälter 5 vernachlässigbar. Durch den räumlichen Abstand vom Verflüssiger 10 ist das Drosselrohr 12 vor vom Verflüssiger 10 abgegebener Wärme abgeschirmt. Daher ist mit dem Drosselrohr 12 eine stärkere Abkühlung des Kältemittels erreichbar, als durch eine Vergrößerung des Verflüssigers 10 um das Volumen des Drosselrohrs 12.By using a small inner diameter tube, typically about 0.8 millimeter, for the choke tube 12, the volume of the entire refrigerant loop changes little, compared to a conventional one, despite a length of the choke tube 12 of typically 1 to 2 meters Refrigerant circuit of a refrigerator of the same size, and accordingly, the amount of circulating refrigerant required for efficient operation changes little. Since the throttle tube 12 extends on the central plate 13 at a distance from the web 15 connected to the inner container 5, the heat flow from the throttle tube 12 to the storage chamber 4 via the connection between the sheet metal blank 6 and the inner container 5 is negligible. Due to the spatial distance from the condenser 10, the throttle tube 12 is shielded from heat emitted by the condenser 10. Therefore, with the throttle tube 12, a greater cooling of the refrigerant can be achieved than by an enlargement of the condenser 10 by the volume of the throttle tube 12.

Vorzugsweise ist das Gerät 1 so aufgestellt, dass die das Drosselrohr 12 enthaltende Seitenwand frei liegt, so dass von dem Drosselrohr 12 abgegebene Wärme schnell an die Umgebung weiter gegeben werden kann. Die Erfindung ist, wenn auch in geringem Umfang, aber auch bei Kältegerät mit verdeckter Seitenwand wie etwa einem Einbaugerät oder einem seitlich von anderen Gegenständen flankierten Tischgerät anwendbar. Hier wirkt der Blechzuschnitt 6 als ein Wärmespeicher, der Wärme vom Drosselrohr 12 aufnimmt, solange der Verdichter 9 in Betrieb ist und die Zirkulation von Kältemittel antreibt. In einer anschließenden Stillstandsphase des Verdichters kann sich auch bei einem solchen Kältegerät die Wärme des Blechzuschnitts 6 an die Umgebung verteilen.Preferably, the device 1 is positioned so that the side wall containing the throttle tube 12 is exposed, so that emitted from the throttle tube 12 heat quickly to the Environment can be given further. The invention is applicable, albeit to a small extent, but also in refrigeration device with hidden side wall such as a built-in appliance or a laterally flanked by other objects table device. Here, the sheet metal blank 6 acts as a heat accumulator that receives heat from the throttle tube 12 as long as the compressor 9 is in operation and drives the circulation of refrigerant. In a subsequent standstill phase of the compressor, the heat of the sheet metal blank 6 can be distributed to the environment even in such a refrigeration device.

Claims (8)

  1. Refrigerator, in particular a household refrigerator, having a thermally insulating housing (2, 3), which encloses a storage chamber (4), and a refrigerant circuit, which comprises a compressor (9), a condenser (10), a restrictor (12, 17) and an evaporator (18), which cools the storage chamber (4), wherein the restrictor (12, 17) is disposed at least partially on a wall of the housing (2) between an outer skin (6) and an insulating layer of the wall to cool refrigerant circulating therein, characterised in that the wall is a side wall.
  2. Refrigerator according to claim 1, characterised in that the restrictor (12, 17) is bonded to the outer skin (6), in particular by adhesive tape (14).
  3. Refrigerator according to one of the preceding claims, characterised in that the restrictor (12, 17) comprises an upstream segment (12) and a downstream segment (17) and the part of the restrictor disposed on the side wall is the upstream segment (12).
  4. Refrigerator according to claim 3, characterised in that the downstream segment of the restrictor (12, 17) is positioned in a suction tube (19) leading from the evaporator (18) to the compressor (8).
  5. Refrigerator according to claim 3 or 4, characterised in that the downstream segment (17) has a smaller cross section than the upstream segment (12).
  6. Refrigerator according to one of claims 3 to 5, characterised in that the upstream segment (12) has a free diameter of less than 1 mm.
  7. Refrigerator according to one of claims 3 to 6, characterised in that the upstream segment (12) has a length of at least 1 m.
  8. Refrigerator according to one of claims 3 to 7, characterised in that the downstream (17) segment and the upstream segment (12) are joined to one another outside an insulating layer of the side wall.
EP12707768.3A 2011-03-28 2012-03-09 Refrigerator Active EP2691713B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12707768T PL2691713T3 (en) 2011-03-28 2012-03-09 Refrigerator

Applications Claiming Priority (2)

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DE102011006260A DE102011006260A1 (en) 2011-03-28 2011-03-28 The refrigerator
PCT/EP2012/054059 WO2012130584A2 (en) 2011-03-28 2012-03-09 Refrigerator

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EP2691713A2 EP2691713A2 (en) 2014-02-05
EP2691713B1 true EP2691713B1 (en) 2015-07-15

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US (1) US20140053593A1 (en)
EP (1) EP2691713B1 (en)
CN (1) CN103477169B (en)
DE (1) DE102011006260A1 (en)
ES (1) ES2544837T3 (en)
PL (1) PL2691713T3 (en)
RU (1) RU2553251C2 (en)
WO (1) WO2012130584A2 (en)

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KR102459784B1 (en) 2017-08-01 2022-10-28 엘지전자 주식회사 Vacuum adiabatic body and refrigerator
KR102449175B1 (en) 2017-08-01 2022-09-29 엘지전자 주식회사 Vacuum adiabatic body and refrigerator
KR102427466B1 (en) 2017-08-01 2022-08-01 엘지전자 주식회사 Vehicle, refrigerater for vehicle, and controlling method for refrigerator for vehicle
KR102449177B1 (en) 2017-08-01 2022-09-29 엘지전자 주식회사 Vacuum adiabatic body and refrigerator
KR102529116B1 (en) * 2017-08-01 2023-05-08 엘지전자 주식회사 Vacuum adiabatic body, fabrication method for the vacuum adibatic body, and refrigerating or warming apparatus insulated by the vacuum adiabatic body
KR102459786B1 (en) 2017-08-16 2022-10-28 엘지전자 주식회사 Vacuum adiabatic body and refrigerator

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Also Published As

Publication number Publication date
RU2013143743A (en) 2015-05-10
WO2012130584A2 (en) 2012-10-04
PL2691713T3 (en) 2015-12-31
CN103477169B (en) 2016-03-02
US20140053593A1 (en) 2014-02-27
CN103477169A (en) 2013-12-25
DE102011006260A1 (en) 2012-10-04
ES2544837T3 (en) 2015-09-04
RU2553251C2 (en) 2015-06-10
EP2691713A2 (en) 2014-02-05
WO2012130584A3 (en) 2012-11-22

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