EP3171107B1 - Refrigeration device with water supply - Google Patents

Refrigeration device with water supply Download PDF

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Publication number
EP3171107B1
EP3171107B1 EP16194273.5A EP16194273A EP3171107B1 EP 3171107 B1 EP3171107 B1 EP 3171107B1 EP 16194273 A EP16194273 A EP 16194273A EP 3171107 B1 EP3171107 B1 EP 3171107B1
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EP
European Patent Office
Prior art keywords
pipeline
sleeve
storage chamber
refrigeration appliance
appliance according
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EP16194273.5A
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German (de)
French (fr)
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EP3171107A1 (en
Inventor
Klaus Pfeiffer
Karl-Friedrich Laible
Eugen Gaplikow
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25CPRODUCING, WORKING OR HANDLING ICE
    • F25C1/00Producing ice
    • F25C1/22Construction of moulds; Filling devices for moulds
    • F25C1/25Filling devices for moulds
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00General constructional features
    • F25D23/06Walls
    • F25D23/065Details
    • F25D23/068Arrangements for circulating fluids through the insulating material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25CPRODUCING, WORKING OR HANDLING ICE
    • F25C2400/00Auxiliary features or devices for producing, working or handling ice
    • F25C2400/14Water supply
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25CPRODUCING, WORKING OR HANDLING ICE
    • F25C2500/00Problems to be solved
    • F25C2500/08Sticking or clogging of ice

Definitions

  • the present invention relates to a refrigeration device, in particular a household refrigeration device, with a water supply, such as in FIG WO2014 / 090608 A1 described.
  • a water supply that connects the refrigeration device to a building water connection is required in particular when an automatic ice maker is to be operated in a storage chamber of the refrigeration device.
  • the U.S. 4,020,644 A discloses a cooling device with a water supply system for an automatic ice maker.
  • the cooling device On the thermal insulation side, the cooling device comprises a water supply line which is held in contact with an outer housing of the cooling device by a holding element.
  • the US 2004/148957 A1 discloses an ice maker in a freezer compartment of a refrigerator with a fill tube for transporting liquid to an ice tray.
  • An opening is formed on an inner wall of the freezer compartment through which the filling tube extends with play.
  • the warm air generated during evaporator defrosting can flow around the filling tube through the clearance-containing opening in the inner wall and heat the filling tube.
  • slots are provided in the filling tube.
  • the filling pipe can be heated electrically, but this has a significant impact on the energy efficiency of the refrigeration device, as on the one hand energy has to be used to keep the filling pipe frost-free and on the other hand the compressor of the refrigeration device has to run longer to avoid the heating of the Filling tube released heat out of the storage chamber.
  • the object of the invention is to create a refrigeration device with a water supply, in which it is ensured that the water supply is functional at all times without the energy efficiency of the device being impaired as a result.
  • the object is achieved in that in a refrigeration device, in particular a household refrigerator, with a storage chamber that can be cooled to below 0 ° C and a water supply opening into the storage chamber, the water supply within the storage chamber is formed by an elastically expandable pipe.
  • a refrigeration device in particular a household refrigerator
  • the water supply within the storage chamber is formed by an elastically expandable pipe.
  • the water supply is surrounded by a sleeve over at least part of its length.
  • the sleeve is dimensioned in order to prevent the pipeline from expanding beyond its elastic limit.
  • the water supply will be provided to supply an ice maker in the storage chamber with fresh water; In principle, however, other consumers in the storage chamber can also be supplied via the water supply.
  • a shut-off valve should be provided in a frost-free section of the water supply so that its function is not impaired by ice formation.
  • the pipeline preferably comprises a hose made of rubber-elastic material.
  • the pipeline could also consist of a non-stretchable elastic material such as a thin sheet of metal, but then special cross-sectional shapes of the pipeline such as a cross or star cross-section are required to enable the cross-sectional expansion required to release the ice plug under pressure.
  • a section of the pipeline that protrudes into the storage chamber can be stabilized by the sleeve, which can be necessary in particular when this section is off a slightly pliable material and could bend under the weight of the water it contains. Sheathing through the sleeve can also be used here for thermal insulation of the pipeline and delay the freezing of the water in it after a filling process.
  • the pipeline extends outside the storage chamber, it makes sense to narrowly limit a possible widening of the pipeline there by a sleeve surrounding it, preferably by the sleeve closely surrounding the pipe outside the storage chamber. Since many resilient materials are more resilient when warm than when cold, without such a limitation there would be a risk that the warm part of the pipeline would be excessively stretched before the expansion at its cold end is sufficient to clear the ice plug, or the cold end even completely unstretched and the ice plug remains in place.
  • the pipeline can also be pushed into the sleeve. This is particularly useful if the sleeve is to surround the pipeline only over part of its length and / or if a different material is to be used for the sleeve than for the pipeline.
  • the sleeve should expediently separate the pipeline from a layer of insulation material surrounding the storage chamber. In this way, permanent deformation of the insulation material layer through repeated expansion of the pipeline, which would lead to a cold bridge between the storage chamber and the surroundings, can be prevented.
  • the sleeve surrounds the pipeline with clearance.
  • the pipeline still has space to expand within the insulation material layer, at a point up to which the ice plug does not extend, which considerably facilitates the expansion of the expansion past the plug to the end of the pipeline.
  • an upstream section of the water supply is preferably not elastically expandable.
  • the pipe 14 ends shortly before the water supply 7 passes through the insulation material layer 13.
  • a pipe 15 made of rubber-elastic material is pushed onto the end of the pipe 14 and secured by a clamp 16 or the like.
  • the pipeline 15 extends through the insulation material layer 13 and protrudes freely into the storage chamber 3, so that an outlet end 19 of the pipeline 15 above the (in Fig. 2a not shown) tray 5 is.
  • the cross section of the pipeline 15 is only a few millimeters - at least in that section 17 that extends through the insulation material layer 13 and in the section 18 protruding into the storage chamber 3 in order to minimize the inflow of ambient heat to the storage chamber 3 via the pipeline 15.
  • the pipeline 15 is not surrounded by the sleeve 21. If the shut-off valve 10 is opened to let fresh water into the tray 5, but at the same time the pipe 15 is blocked by the ice plug 20, the pressure of the domestic water pipe is in the pipe 15 and expands the pipe 15 at this point 22, as in Figure 2b shown. As a result, the wall of the pipeline 15 also lifts off the ice plug 20, and liquid water can penetrate into the gap 23 that forms around the upstream end of the ice plug 20. So the gap 23 grows in length, and as soon as it is as in Figure 2c shown has reached the outlet end 19 of the pipeline 15, the ice plug 20 is pushed out under the pressure of the water and falls into the tray 5.
  • the water supply 7 is now continuous, and the tray 5 can be filled.
  • the stretched parts of the pipeline 15 contract again, so that if the water in section 18 freezes again after filling, an ice plug 20 with the same dimensions as before is created, which can be expelled by expanding the pipeline 15 again.
  • the pipeline 15 and the sleeve 24 are connected by webs 26 over their entire length.
  • the webs 26, like the pipeline 15, are thin-walled and are able to yield to a widening of the pipeline 15.
  • the webs 26 can extend in a straight line in the axial direction of the extrusion profile 22, but they can also run helically around the pipeline 15. In the latter case, a single web 26 can be sufficient to keep the pipeline 15 centered in the sleeve 21.
  • the diameter of the sleeve 24 is expediently dimensioned here so that the sleeve 24 prevents the pipe 15 from expanding beyond its elastic limit. In this way, local overstressing of the pipeline 15, which in the long term would lead to the pipeline 15 bursting, can be reliably prevented even if the wall thickness of the pipeline 15 is small.
  • the design of the Fig. 5 resembles that of Figures 2a-c in that the expandable pipeline 15 is surrounded outside of the insulation material layer 13 and on part of its way through the insulation material layer 13 by a tight-fitting, non-extensible sleeve 28 which protrudes from the outside into the insulation material layer 13.
  • the pipe 15 is a piece of rubber or silicone hose which is fastened to the end of a rigid pipe 14 coming from the shut-off valve 10 and is pushed into the sleeve 28.
  • the sleeve 28 is in turn against the insulation material of the layer 13 tightly plug-connected to a sleeve 29 engaging in the insulation material layer 13 from the storage chamber 3, the diameter of which is larger than that of the sleeve 17 and which thus accommodates the pipe 15 with clearance and - in contrast to the sleeve 17 - allows the pipe 15 to expand under pressure .
  • the length and diameter of the sleeve 29 are dimensioned such that the temperature at the end 30 of the sleeve 29 facing away from the storage chamber is always above 0 ° C., so that the ice plug 20 never expands over the entire length of the sleeve 29.
  • a widening can always form in the pipeline 15 upstream of the plug 20 and grow towards the outlet end 19, thereby loosening the ice plug 20.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Insulation (AREA)

Description

Die vorliegende Erfindung betrifft ein Kältegerät, insbesondere ein Haushaltskältegerät, mit einer Wasserzuführung, wie z.B. in WO2014/090608 A1 beschrieben.The present invention relates to a refrigeration device, in particular a household refrigeration device, with a water supply, such as in FIG WO2014 / 090608 A1 described.

Eine Wasserzuführung, die das Kältegerät mit einem Gebäudewasseranschluss verbindet, wird insbesondere dann benötigt, wenn in einer Lagerkammer des Kältegeräts ein automatischer Eisbereiter betrieben werden soll.A water supply that connects the refrigeration device to a building water connection is required in particular when an automatic ice maker is to be operated in a storage chamber of the refrigeration device.

Bei dem aus WO 2014/090608 A1 bekannten Kältegerät ragt ein Füllrohr, das ein stromabwärtiges Ende der Wasserzuführung bildet, in die Lagerkammer hinein und ist dort Temperaturen von unter 0°C ausgesetzt. Dies hat zur Folge, dass wenn sich das Füllrohr nach einem Befüllen des Eisbereiters mit Wasser nicht vollständig entleert, darin zurückbleibendes Wasser gefrieren kann. Wenn dadurch die Wasserzuführung verstopft, kommt die Eiserzeugung zum Erliegen.In the off WO 2014/090608 A1 Known refrigeration device, a filling pipe, which forms a downstream end of the water supply, protrudes into the storage chamber and is exposed to temperatures below 0 ° C there. As a result, if the filling tube does not completely empty itself after the ice maker has been filled with water, the water remaining in it can freeze. If this clogs the water supply, ice production comes to a standstill.

Die US 4 020 644 A offenbart eine Kühlvorrichtung mit einem Wasserzuführsystem für einen automatischen Eisbereiter. Die Kühlvorrichtung umfasst wärmeisolationsseitig eine Wasserversorgungsleitung, welche durch ein Haltelement in Kontakt mit einem Außengehäuse der Kühlvorrichtung gehalten wird.The U.S. 4,020,644 A discloses a cooling device with a water supply system for an automatic ice maker. On the thermal insulation side, the cooling device comprises a water supply line which is held in contact with an outer housing of the cooling device by a holding element.

Die US 2004/148957 A1 offenbart eine Eismaschine in einem Gefrierfach eines Kühlschranks mit einem Füllrohr zum Transportieren von Flüssigkeit zu einer Eisschale. An einer Innenwand des Gefrierfachs ist eine Öffnung ausgebildet, durch die sich das Füllrohr mit Spiel erstreckt. Die bei Verdampferabtauung erzeugte warme Luft kann durch die spielhaltige Öffnung in der Innenwand um das Füllrohr strömen und das Füllrohr erwärmen. Zusätzlich sind Schlitze in dem Füllrohr vorgesehen. Um dem vorzubeugen, kann das Füllrohr elektrisch beheizt werden, allerdings beeinträchtigt dies erheblich die Energieeffizienz des Kältegeräts, da einerseits Energie aufgewandt werden muss, um das Füllrohr frostfrei zu halten, und andererseits der Verdichter des Kältegeräts länger laufen muss, um die von der Heizung des Füllrohrs abgegebene Wärme wieder aus der Lagerkammer hinauszuschaffen.The US 2004/148957 A1 discloses an ice maker in a freezer compartment of a refrigerator with a fill tube for transporting liquid to an ice tray. An opening is formed on an inner wall of the freezer compartment through which the filling tube extends with play. The warm air generated during evaporator defrosting can flow around the filling tube through the clearance-containing opening in the inner wall and heat the filling tube. In addition, slots are provided in the filling tube. To prevent this, the filling pipe can be heated electrically, but this has a significant impact on the energy efficiency of the refrigeration device, as on the one hand energy has to be used to keep the filling pipe frost-free and on the other hand the compressor of the refrigeration device has to run longer to avoid the heating of the Filling tube released heat out of the storage chamber.

Es ist auch vorgeschlagen worden, Umgebungswärme einzusetzen, um die Wasserzuführung eisfrei zu halten. Dadurch kann zwar die für den Betrieb der Heizung aufgewandte Energie eingespart werden, doch führt der vermehrte Wärmezufluss zur Lagerkammer auch hier zu verlängerten Verdichterlaufzeiten und entsprechend erhöhtem Energieverbrauch.It has also been proposed to use ambient heat to keep the water supply free of ice. As a result, the energy used to operate the heating can be saved, but the increased flow of heat to the storage chamber also leads to longer compressor running times and correspondingly increased energy consumption.

Aufgabe der Erfindung ist, ein Kältegerät mit Wasserzuführung zu schaffen, bei dem sichergestellt ist, dass die Wasserzuführung jederzeit funktionsfähig ist, ohne dass dadurch die Energieeffizienz des Gerätes beeinträchtigt wird.The object of the invention is to create a refrigeration device with a water supply, in which it is ensured that the water supply is functional at all times without the energy efficiency of the device being impaired as a result.

Die Aufgabe wird gelöst, indem bei einem Kältegerät, insbesondere einem Haushaltskältegerät, mit einer auf unter 0°C abkühlbaren Lagerkammer und einer in die Lagerkammer einmündenden Wasserzuführung die Wasserzuführung innerhalb der Lagerkammer durch eine elastisch aufweitbare Rohrleitung gebildet ist. Dies schließt nicht aus, dass Wasser, das nach einem Befüllvorgang in der Rohrleitung zurückbleibt, darin gefriert und darin einen Pfropfen aus Eis bildet. Infolge der Dehnbarkeit der Rohrleitung kann jedoch flüssiges Wasser, das mit ausreichendem Druck in die Wasserzuführung eingespeist wird, die Rohrleitung aufweiten und so entweder einen Weg am Pfropfen vorbei schaffen, so dass der Pfropfen durch vorbeiströmendes Wasser aufgetaut wird, oder den Pfropfen als Ganzes aus der Rohrleitung herausdrücken.The object is achieved in that in a refrigeration device, in particular a household refrigerator, with a storage chamber that can be cooled to below 0 ° C and a water supply opening into the storage chamber, the water supply within the storage chamber is formed by an elastically expandable pipe. This does not rule out that water that remains in the pipeline after a filling process freezes in it and forms a plug of ice in it. As a result of the ductility of the pipeline, however, liquid water that is fed into the water supply with sufficient pressure can widen the pipeline and thus either create a path past the plug, so that the plug is thawed by the water flowing past, or the plug as a whole Press out the pipe.

Die Wasserzuführung ist erfindungsgemäß auf wenigstens einem Teil ihrer Länge von einer Hülse umgeben. Erfindungsgemäß ist die Hülse bemessen, um eine Aufweitung der Rohrleitung über ihre Elastizitätsgrenze hinaus zu verhindern.According to the invention, the water supply is surrounded by a sleeve over at least part of its length. According to the invention, the sleeve is dimensioned in order to prevent the pipeline from expanding beyond its elastic limit.

Meist wird die Wasserzuführung vorgesehen sein, um einen Eisbereiter in der Lagerkammer mit frischem Wasser zu versorgen; grundsätzlich können aber auch andere Verbraucher in der Lagerkammer über die Wasserzuführung versorgt werden.Usually the water supply will be provided to supply an ice maker in the storage chamber with fresh water; In principle, however, other consumers in the storage chamber can also be supplied via the water supply.

Ein Absperrventil sollte in einem frostfreien Abschnitt der Wasserzuführung vorgesehen sein, um nicht durch Eisbildung in seiner Funktion beeinträchtigt zu werden.A shut-off valve should be provided in a frost-free section of the water supply so that its function is not impaired by ice formation.

Vorzugsweise umfasst die Rohrleitung einen Schlauch aus gummielastischem Material. Grundsätzlich könnte die Rohrleitung auch aus einem nicht dehnbaren elastischen Material wie etwa einem dünnen Metallblech bestehen, allerdings sind dann spezielle Querschnittsformen der Rohrleitung wie etwa ein Kreuz- oder Sternquerschnitt erforderlich, um die zum Freigeben des Eispfropfens erforderliche Querschnittsaufweitung unter Druck zu ermöglichen.The pipeline preferably comprises a hose made of rubber-elastic material. In principle, the pipeline could also consist of a non-stretchable elastic material such as a thin sheet of metal, but then special cross-sectional shapes of the pipeline such as a cross or star cross-section are required to enable the cross-sectional expansion required to release the ice plug under pressure.

Ein Abschnitt der Rohrleitung, der in die Lagerkammer hineinragt, kann durch die Hülse stabilisiert werden, was insbesondere dann nötig sein kann, wenn dieser Abschnitt aus einem leicht biegsamen Material besteht und sich unter dem Gewicht des in darin enthaltenen Wassers verbiegen könnte. Eine Ummantelung durch die Hülse kann hier auch der thermischen Isolation der Rohrleitung dienen und das Gefrieren des Wassers darin nach einem Befüllvorgang verzögern.A section of the pipeline that protrudes into the storage chamber can be stabilized by the sleeve, which can be necessary in particular when this section is off a slightly pliable material and could bend under the weight of the water it contains. Sheathing through the sleeve can also be used here for thermal insulation of the pipeline and delay the freezing of the water in it after a filling process.

Insbesondere wenn die Rohrleitung sich auch außerhalb der Lagerkammer erstreckt, ist es sinnvoll, eine mögliche Aufweitung der Rohrleitung dort durch eine sie umgebende Hülse eng zu begrenzen, vorzugsweise indem die Hülse die Rohrleitung außerhalb der Lagerkammer eng anliegend umgibt. Da viele elastische Materialien in warmem Zustand nachgiebiger sind als in kaltem, bestünde ohne eine solche Begrenzung die Gefahr, dass der warme Teil der Rohrleitung übermäßig gedehnt wird, bevor die Aufweitung an ihrem kalten Ende ausreicht, um den Eispfropfen zu beseitigen, oder das kalte Ende gar vollends ungedehnt und der Eispfropfen sitzen bleibt.In particular if the pipeline extends outside the storage chamber, it makes sense to narrowly limit a possible widening of the pipeline there by a sleeve surrounding it, preferably by the sleeve closely surrounding the pipe outside the storage chamber. Since many resilient materials are more resilient when warm than when cold, without such a limitation there would be a risk that the warm part of the pipeline would be excessively stretched before the expansion at its cold end is sufficient to clear the ice plug, or the cold end even completely unstretched and the ice plug remains in place.

Die Hülse und die Rohrleitung können einteilig extrudiert sein; dann wird die Hülse, um die Aufweitung der Rohrleitung wirksam zu begrenzen, in der Regel eine größere Wandstärke als letztere aufweisen.The sleeve and the pipeline can be extruded in one piece; then, in order to effectively limit the expansion of the pipeline, the sleeve will generally have a greater wall thickness than the latter.

Die Rohrleitung kann aber auch in die Hülse eingeschoben sein. Dies ist insbesondere dann zweckmäßig, wenn die Hülse die Rohrleitung nur auf einem Teil ihrer Länge umgeben soll und/oder wenn für die Hülse ein anderer Werkstoff als für die Rohrleitung verwendet werden soll.However, the pipeline can also be pushed into the sleeve. This is particularly useful if the sleeve is to surround the pipeline only over part of its length and / or if a different material is to be used for the sleeve than for the pipeline.

Zweckmäßigerweise sollte die Hülse die Rohrleitung von einer die Lagerkammer umgebenden Isolationsmaterialschicht trennen. So kann einer dauerhaften Verformung der Isolationsmaterialschicht durch wiederholtes Aufweiten der Rohrleitung, die zu einer Kältebrücke zwischen Lagerkammer und Umgebung führen würde, vorgebeugt werden.The sleeve should expediently separate the pipeline from a layer of insulation material surrounding the storage chamber. In this way, permanent deformation of the insulation material layer through repeated expansion of the pipeline, which would lead to a cold bridge between the storage chamber and the surroundings, can be prevented.

Zumindest in einem der Lagerkammer benachbarten Bereich der Isolationsmaterialschicht ist es zweckmäßig, wenn die Hülse die Rohrleitung spielhaltig umgibt. So hat die Rohrleitung noch innerhalb der Isolationsmaterialschicht, an einer Stelle, bis zu der der Eispfropfen sich nicht erstreckt, Platz, sich aufzuweiten, was die Ausbreitung der Aufweitung am Pfropfen vorbei bis zum Ende der Rohrleitung erheblich erleichtert.At least in an area of the insulation material layer adjacent to the storage chamber, it is useful if the sleeve surrounds the pipeline with clearance. Thus, the pipeline still has space to expand within the insulation material layer, at a point up to which the ice plug does not extend, which considerably facilitates the expansion of the expansion past the plug to the end of the pipeline.

Umgekehrt ist es zumindest in einem von der Lagerkammer abgewandten Bereich der Isolationsmaterialschicht zweckmäßig, wenn die Hülse die Rohrleitung spielfrei umgibt. So kann der Zustrom von Umgebungswärme zur Lagerkammer minimiert werden.Conversely, it is expedient, at least in an area of the insulation material layer facing away from the storage chamber, if the sleeve surrounds the pipeline without play. In this way, the flow of ambient heat to the storage chamber can be minimized.

Da die elastische Aufweitung nur dann die Entfernung des Eispfropfens begünstigt, wenn sie in dessen unmittelbarer Umgebung stattfindet, ist ein stromaufwärtiger Abschnitt der Wasserzuführung vorzugsweise nicht elastisch aufweitbar.Since the elastic expansion only favors the removal of the ice plug when it takes place in its immediate vicinity, an upstream section of the water supply is preferably not elastically expandable.

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

Fig. 1
einen schematischen Schnitt durch ein erfindungsgemäßes Kältegerät;
Fig. 2a
ein vergrößertes Detail des Kältegeräts mit durch einen Eispfropfen verstopfter Rohrleitung;
Fig. 2b
das Detail der Fig. 2a bei einsetzender Aufweitung der Rohrleitung;
Fig. 2c
das Detail der Fig. 2a beim Lösen des Eispfropfens;
Fig. 3
einen zu Fig. 2a analogen Schnitt gemäß einer abgewandelten Ausgestaltung;
Fig. 4
einen Schnitt entlang der Ebene IV-IV der Fig. 3; und
Fig. 5
einen zu Fig. 2a analogen Schnitt gemäß einer weiteren abgewandelten Ausgestaltung.
Further features and advantages of the invention emerge from the following description of exemplary embodiments with reference to the accompanying figures. Show it:
Fig. 1
a schematic section through an inventive refrigeration device;
Fig. 2a
an enlarged detail of the refrigeration device with the pipeline blocked by an ice plug;
Figure 2b
the detail of the Fig. 2a when the pipeline starts to expand;
Figure 2c
the detail of the Fig. 2a when loosening the ice plug;
Fig. 3
one to Fig. 2a analog section according to a modified embodiment;
Fig. 4
a section along the plane IV-IV of Fig. 3 ; and
Fig. 5
one to Fig. 2a analog section according to a further modified embodiment.

Fig. 1 zeigt einen Schnitt durch ein Haushaltskältegerät, hier einen Gefrierschrank, mit einem Korpus 1 und einer an den Korpus 1 angelenkten Tür 2, die eine gekühlte Lagerkammer 3 umgeben. In der Lagerkammer 3 ist ein Eisbereiter 4 untergebracht. Der Eisbereiter 4 umfasst in an sich bekannter Weise ein Tablett 5 mit einer Mehrzahl von Eiswürfelformen, das zwischen einer Gefrierstellung, in der die Eiswürfelformen nach oben offen und mit frischem Wasser befüllbar sind, und einer Auswurfstellung schwenkbar ist, in der die Eiswürfelformen nach unten offen sind, um die fertigen Eiswürfel in einen unter dem Tablett 5 angeordneten Vorratsbehälter 6 auszugeben. Fig. 1 shows a section through a household refrigerator, here a freezer, with a body 1 and a door 2 hinged to the body 1, which surround a cooled storage chamber 3. An ice maker 4 is housed in the storage chamber 3. The ice maker 4 comprises, in a manner known per se, a tray 5 with a plurality of ice cube molds, which is between a freezing position in which the ice cube molds after are open at the top and can be filled with fresh water, and an ejection position can be pivoted in which the ice cube molds are open at the bottom in order to dispense the finished ice cubes into a storage container 6 arranged under the tray 5.

Die Befüllung des Tabletts 5 mit Wasser erfolgt über eine Wasserzuführung 7. Diese umfasst eine Leitung, typischerweise einen druckfesten, nicht dehnbaren Schlauch 8, der sich von einem Gebäudewasserhahn 9 bis zu einem Absperrventil 10, hier in einem Maschinenraum 11 des Kältegeräts untergebracht, erstreckt, sowie eine in dem Kältegerät fest verlegte Leitung 12, die sich vom Absperrventil durch eine Isolationsmaterialschicht 13 des Korpus 1 hindurch bis in die Lagerkammer 3 erstreckt und über dem Tablett 5 endet. Ein Großteil der Leitung 12 verläuft frostgeschützt außerhalb der Isolationsmaterialschicht 13 und ist hier durch ein steifes Rohr 14 gebildet, das durch den in der Gebäudewasserleitung herrschenden Druck, wenn dieser in dem Rohr 14 ansteht, nicht aufweitbar ist.The tray 5 is filled with water via a water supply 7. This includes a line, typically a pressure-resistant, non-stretchable hose 8, which extends from a building water tap 9 to a shut-off valve 10, housed here in a machine room 11 of the refrigeration device, as well as a line 12 which is permanently laid in the refrigeration device and which extends from the shut-off valve through an insulation material layer 13 of the body 1 into the storage chamber 3 and ends above the tray 5. A large part of the line 12 runs outside of the insulation material layer 13 protected from frost and is formed here by a stiff pipe 14 which cannot be expanded by the pressure prevailing in the building water pipe when this is present in the pipe 14.

Wie in Fig. 2a in einer vergrößerten Detailansicht gezeigt, endet das Rohr 14 kurz vor dem Durchtritt der Wasserzuführung 7 durch die Isolationsmaterialschicht 13. Eine Rohrleitung 15 aus gummielastischem Material ist auf das Ende des Rohrs 14 aufgesteckt und durch eine Schelle 16 o. dgl. gesichert. Die Rohrleitung 15 erstreckt sich durch die Isolationsmaterialschicht 13 hindurch und ragt frei in die Lagerkammer 3 hinein, so dass ein Austrittsende 19 der Rohrleitung 15 über dem (in Fig. 2a nicht dargestellten) Tablett 5 liegt.As in Fig. 2a Shown in an enlarged detailed view, the pipe 14 ends shortly before the water supply 7 passes through the insulation material layer 13. A pipe 15 made of rubber-elastic material is pushed onto the end of the pipe 14 and secured by a clamp 16 or the like. The pipeline 15 extends through the insulation material layer 13 and protrudes freely into the storage chamber 3, so that an outlet end 19 of the pipeline 15 above the (in Fig. 2a not shown) tray 5 is.

Der Querschnitt der Rohrleitung 15 beträgt - zumindest in demjenigen Abschnitt 17, der sich durch die Isolationsmaterialschicht 13 erstreckt, und in dem in die Lagerkammer 3 hineinragenden Abschnitt 18 nur wenige Millimeter, um den Zufluss von Umgebungswärme zur Lagerkammer 3 über die Rohrleitung 15 zu minimieren. Dies hat zur Folge, dass nach einem Befüllen des Tabletts 5 regelmäßig Wasser in der Rohrleitung 15 zurückbleibt, das im Abschnitt 18 gefriert und dort einen die Rohrleitung 15 auf ihrem gesamten Querschnitt versperrenden Eispfropfen 20 bildet.The cross section of the pipeline 15 is only a few millimeters - at least in that section 17 that extends through the insulation material layer 13 and in the section 18 protruding into the storage chamber 3 in order to minimize the inflow of ambient heat to the storage chamber 3 via the pipeline 15. As a result, after the tray 5 has been filled, water regularly remains in the pipeline 15, which freezes in the section 18 and there forms an ice plug 20 blocking the pipeline 15 over its entire cross section.

Eine steife, nicht dehnbare Hülse 21 umgibt einen außerhalb der Isolationsmaterialschicht 13 liegenden Abschnitt der Rohrleitung 15 und erstreckt sich bis in die Isolationsmaterialschicht 13 hinein. Die Hülse 21 liegt außen eng an der Rohrleitung 15 an und lässt keine nennenswerte Aufweitung der Rohrleitung 15 unter Druck zu.A stiff, inextensible sleeve 21 surrounds a section of the pipeline 15 lying outside the insulation material layer 13 and extends into the Insulation material layer 13 into it. The sleeve 21 rests closely on the outside of the pipeline 15 and does not allow any significant expansion of the pipeline 15 under pressure.

In einem Teil zur Lagerkammer 3 benachbarten Teil des Abschnitts 17 ist die Rohrleitung 15 nicht von der Hülse 21 umgeben. Wenn das Absperrventil 10 geöffnet wird, um frisches Wasser in das Tablett 5 einzulassen, gleichzeitig aber die Rohrleitung 15 durch den Eispfropfen 20 versperrt ist, liegt der Druck der Hauswasserleitung in der Rohrleitung 15 an und dehnt die Rohrleitung 15 an dieser Stelle 22 auf, wie in Fig. 2b gezeigt. Dadurch hebt sich die Wand der Rohrleitung 15 auch vom Eispfropfen 20 ab, und flüssiges Wasser kann in den sich rings um das stromaufwärtige Ende des Eispfropfens 20 bildenden Spalt 23 eindringen. So wächst der Spalt 23 in die Länge, und sobald er wie in Fig. 2c gezeigt das Austrittsende 19 der Rohrleitung 15 erreicht hat, wird der Eispfropfen 20 unter dem Druck des Wassers herausgeschoben und fällt ins Tablett 5. Die Wasserzuführung 7 ist nun durchgängig, und das Tablett 5 kann befüllt werden. Während des Befüllens ziehen die gedehnten Teile der Rohrleitung 15 sich wieder zusammen, so dass, wenn nach dem Befüllen wieder das Wasser im Abschnitt 18 gefriert, ein Eispfropfen 20 mit denselben Abmessungen wie zuvor entsteht, der durch neuerliches Aufweiten der Rohrleitung 15 ausgetrieben werden kann.In a part of the section 17 adjacent to the storage chamber 3, the pipeline 15 is not surrounded by the sleeve 21. If the shut-off valve 10 is opened to let fresh water into the tray 5, but at the same time the pipe 15 is blocked by the ice plug 20, the pressure of the domestic water pipe is in the pipe 15 and expands the pipe 15 at this point 22, as in Figure 2b shown. As a result, the wall of the pipeline 15 also lifts off the ice plug 20, and liquid water can penetrate into the gap 23 that forms around the upstream end of the ice plug 20. So the gap 23 grows in length, and as soon as it is as in Figure 2c shown has reached the outlet end 19 of the pipeline 15, the ice plug 20 is pushed out under the pressure of the water and falls into the tray 5. The water supply 7 is now continuous, and the tray 5 can be filled. During filling, the stretched parts of the pipeline 15 contract again, so that if the water in section 18 freezes again after filling, an ice plug 20 with the same dimensions as before is created, which can be expelled by expanding the pipeline 15 again.

Fig. 3 zeigt einen zu Fig. 2a analogen Schnitt durch eine Ecke des Korpus 1 und die sich dort durch die Isolationsmaterialschicht 13 erstreckende Rohrleitung 15 gemäß einer zweiten Ausgestaltung der Erfindung, und Fig. 4 zeigt einen Schnitt durch die Rohrleitung 15 entlang der Ebene IV-IV aus Fig. 3. Die Rohrleitung 15 ist hier zusammen mit einer sie umgebenden Hülse 24 als Extrusionsprofil 25 gefertigt. Die Rohrleitung 15 ist dünnwandig genug, um unter Druck elastisch aufweitbar zu sein, die Hülse 24 ist aufgrund ihrer größeren Wandstärke steif und nicht nennenswert aufweitbar, sie schützt den in die Lagerkammer 3 hineinragenden Abschnitt 18 der Rohrleitung 15 vor versehentlichem Verbiegen, das dazu führen könnte, dass das Wasser aus der Rohrleitung 15 nicht ins Tablett 5 gelangt. Fig. 3 shows one to Fig. 2a analogous section through a corner of the body 1 and the pipe 15 extending there through the insulating material layer 13 according to a second embodiment of the invention, and Fig. 4 shows a section through the pipeline 15 along the plane IV-IV Fig. 3 . The pipeline 15 is manufactured here together with a sleeve 24 surrounding it as an extrusion profile 25. The pipeline 15 is thin enough to be elastically expandable under pressure, the sleeve 24 is stiff due to its greater wall thickness and cannot be expanded significantly, it protects the section 18 of the pipeline 15 protruding into the storage chamber 3 from accidental bending that could lead to this that the water from the pipe 15 does not get into the tray 5.

Die Rohrleitung 15 und die Hülse 24 sind über ihre ganze Länge hinweg über Stege 26 verbunden. Die Stege 26 sind wie die Rohrleitung 15 dünnwandig und sind in der Lage, einer Aufweitung der Rohrleitung 15 nachgeben. Die Stege 26 können sich geradlinig in axialer Richtung des Extrusionsprofils 22 erstrecken, sie können aber auch schraubenlinienförmig um die Rohrleitung 15 herum verlaufen. In letzterem Falle kann ein einziger Steg 26 ausreichen, um die Rohrleitung 15 in der Hülse 21 zentriert zu halten.The pipeline 15 and the sleeve 24 are connected by webs 26 over their entire length. The webs 26, like the pipeline 15, are thin-walled and are able to yield to a widening of the pipeline 15. The webs 26 can extend in a straight line in the axial direction of the extrusion profile 22, but they can also run helically around the pipeline 15. In the latter case, a single web 26 can be sufficient to keep the pipeline 15 centered in the sleeve 21.

Der Durchmesser der Hülse 24 ist hier zweckmäßigerweise so bemessen, dass die Hülse 24 eine Aufweitung der Rohrleitung 15 über ihre Elastizitätsgrenze hinaus verhindert. So kann eine lokale Überbeanspruchung der Rohrleitung 15, die auf Dauer zu einem Platzen der Rohrleitung 15 führen würde, auch bei geringer Wandstärke der Rohrleitung 15 sicher unterbunden werden.The diameter of the sleeve 24 is expediently dimensioned here so that the sleeve 24 prevents the pipe 15 from expanding beyond its elastic limit. In this way, local overstressing of the pipeline 15, which in the long term would lead to the pipeline 15 bursting, can be reliably prevented even if the wall thickness of the pipeline 15 is small.

Wie bei der ersten Ausgestaltung ist die Rohrleitung 15 über ein steifes Rohr 14 mit dem Absperrventil 10 verbunden. Das steife Rohr 14 ist an einem aus dem Korpus 1 herausragenden Ende des Extrusionsprofils 22 in die Rohrleitung 15 eingesteckt; sein Durchmesser ist so gewählt, dass die Rohrleitung 15 von innen an die Hülse 24 angedrückt ist. So ist ein Zwischenraum 27 zwischen Rohrleitung 15 und Hülse 21 nach außen dicht verschlossen, und ein Zufluss von warmer Umgebungsluft durch den Zwischenraum 27 in die Lagerkammer 3 ist ausgeschlossen. Wenn die Stege 26 wie oben erwähnt schraubenlinienförmig um die Rohrleitung 15 verlaufen, kann dadurch auch Wärmetransport durch Luftzirkulation zwischen einem warmen und einem kalten Ende des Zwischenraums 27 wirksam unterbunden werden.As in the first embodiment, the pipeline 15 is connected to the shut-off valve 10 via a rigid pipe 14. The rigid tube 14 is inserted into the pipeline 15 at an end of the extrusion profile 22 protruding from the body 1; its diameter is selected such that the pipe 15 is pressed against the sleeve 24 from the inside. Thus, an intermediate space 27 between the pipeline 15 and the sleeve 21 is sealed to the outside and an inflow of warm ambient air through the intermediate space 27 into the storage chamber 3 is excluded. If the webs 26 run helically around the pipeline 15, as mentioned above, heat transport by air circulation between a warm and a cold end of the intermediate space 27 can thereby also be effectively prevented.

Die Wirkungsweise dieser Ausgestaltung gleicht der mit Bezug auf Fig. 2a-c beschriebenen: Wenn sich am Ende der Rohrleitung 15 ein Eispfropfen bildet, dann steigt bei Öffnen des Absperrventils 10 der Druck in der Rohrleitung 15, und diese dehnt sich, bis sie durch die Hülse 24 an weiterer Aufweitung gehindert wird. Durch diese Aufweitung kann Wasser zwischen den Eispfropfen und den ihn umgebenden Teil der Rohrleitung 15 eindringen und den Eispfropfen lösen.The mode of operation of this embodiment is the same as with reference to FIG Figures 2a-c If an ice plug forms at the end of the pipeline 15, the pressure in the pipeline 15 increases when the shut-off valve 10 is opened, and the pipeline expands until it is prevented from further expanding by the sleeve 24. This expansion allows water to penetrate between the ice plug and the part of the pipeline 15 surrounding it and loosen the ice plug.

Die Ausgestaltung der Fig. 5 gleicht derjenigen der Fig. 2a-c darin, dass die dehnbare Rohrleitung 15 außerhalb der Isolationsmaterialschicht 13 und auf einem Teil ihres Wegs durch die Isolationsmaterialschicht 13 von einer eng anliegenden, nicht dehnbaren Hülse 28 umgeben ist, die von der Außenseite her in die Isolationsmaterialschicht 13 hineinragt. Die Rohrleitung 15 ist ein Stück Gummi- oder Silikonschlauch, das am Ende einer vom Absperrventil 10 kommenden steifen Leitung 14 befestigt und in die Hülse 28 eingeschoben ist. Die Hülse 28 ist wiederum gegen das Isolationsmaterial der Schicht 13 dicht mit einer von der Lagerkammer 3 her in die Isolationsmaterialschicht 13 eingreifenden Hülse 29 steckverbunden, deren Durchmesser größer als der der Hülse 17 ist und die somit die Rohrleitung 15 spielhaltig aufnimmt und - im Gegensatz zur Hülse 17 - eine Aufweitung der Rohrleitung 15 unter Druck zulässt. Länge und Durchmesser der Hülse 29 sind so bemessen, dass am von der Lagerkammer abgewandten Ende 30 der Hülse 29 die Temperatur stets über 0°C liegt, so dass der Eispfropfen 20 sich niemals über die gesamte Länge der Hülse 29 ausdehnt. So kann sich an dem Ende 30 stets stromaufwärts vom Pfropfen 20 eine Aufweitung in der Rohrleitung 15 bilden und zum Austrittsende 19 wachsen und dadurch der Eispfropfen 20 gelöst werden.The design of the Fig. 5 resembles that of Figures 2a-c in that the expandable pipeline 15 is surrounded outside of the insulation material layer 13 and on part of its way through the insulation material layer 13 by a tight-fitting, non-extensible sleeve 28 which protrudes from the outside into the insulation material layer 13. The pipe 15 is a piece of rubber or silicone hose which is fastened to the end of a rigid pipe 14 coming from the shut-off valve 10 and is pushed into the sleeve 28. The sleeve 28 is in turn against the insulation material of the layer 13 tightly plug-connected to a sleeve 29 engaging in the insulation material layer 13 from the storage chamber 3, the diameter of which is larger than that of the sleeve 17 and which thus accommodates the pipe 15 with clearance and - in contrast to the sleeve 17 - allows the pipe 15 to expand under pressure . The length and diameter of the sleeve 29 are dimensioned such that the temperature at the end 30 of the sleeve 29 facing away from the storage chamber is always above 0 ° C., so that the ice plug 20 never expands over the entire length of the sleeve 29. Thus, at the end 30, a widening can always form in the pipeline 15 upstream of the plug 20 and grow towards the outlet end 19, thereby loosening the ice plug 20.

BEZUGSZEICHENREFERENCE MARK

11
KorpusBody
22
Türdoor
33
LagerkammerStorage room
44th
EisbereiterIce maker
55
Tabletttray
66th
VorratsbehälterStorage container
77th
WasserzuführungWater supply
88th
Schlauchtube
99
HauswasserhahnHouse faucet
1010
AbsperrventilShut-off valve
1111
MaschinenraumEngine room
1212th
Leitungmanagement
1313
IsolationsmaterialschichtInsulation material layer
1414th
Rohrpipe
1515th
RohrleitungPipeline
1616
Schelleclamp
1717th
Abschnitt der RohrleitungSection of the pipeline
1818th
Abschnitt der RohrleitungSection of the pipeline
1919th
AustrittsendeExit end
2020th
EispfropfenIce plugs
2121st
HülseSleeve
2222nd
aufgeweitete Stellewidened place
2323
Spaltgap
2424
HülseSleeve
2525th
ExtrusionsprofilExtrusion profile
2626th
Stegweb
2727
ZwischenraumSpace
2828
HülseSleeve
2929
HülseSleeve
3030th
Ende der HülseEnd of the sleeve

Claims (13)

  1. Refrigeration appliance, in particular a household refrigeration appliance, with a storage chamber (3) which can be cooled to below 0°C and a water supply (7) feeding into the storage chamber (3), wherein the water supply (7) is formed by a resiliently expandable pipeline (15), at least inside the storage chamber (3), characterised in that the pipeline (15) is surrounded by a sleeve (21; 24; 28; 29) on at least one part of its length, wherein the sleeve (21; 24; 28, 29) is dimensioned such that it inhibits an expansion of the pipeline (15) beyond its resiliency limit.
  2. Refrigeration appliance according to claim 1, characterised in that an ice maker (4) fed by the water supply (7) is provided in the storage chamber (3).
  3. Refrigeration appliance according to claim 1 or 2, characterised in that a stop valve (10) is provided in a frost-free section of the water supply (7).
  4. Refrigeration appliance according to one of the preceding claims, characterised in that the pipeline (15) comprises a resilient rubber hose.
  5. Refrigeration appliance according to one of the preceding claims, characterised in that the sleeve (24) surrounds a section (18) of the pipeline (15) protruding into the storage chamber (3).
  6. Refrigeration appliance according to one of the preceding claims, characterised in that the sleeve (21, 28) surrounds the pipeline (15) outside the storage chamber (3) with a close fit.
  7. Refrigeration appliance according to one of the preceding claims, characterised in that the sleeve (24) and the pipeline (15) are extruded in one piece.
  8. Refrigeration appliance according to claim 7, characterised in that the sleeve (24) and the pipeline (15) are connected by at least one web (26).
  9. Refrigeration appliance according to one of claims 1 to 6, characterised in that the pipeline (15) is inserted into the sleeve (28).
  10. Refrigeration appliance according to one of the preceding claims, characterised in that the sleeve (21; 24; 28, 29) separates the pipeline (15) from an insulation material layer (13) surrounding the storage chamber (3).
  11. Refrigeration appliance according to claim 10, characterised in that the sleeve (24, 29) surrounds the pipeline (15) while retaining play at least in a region of the insulation material layer (13) adjacent to the storage chamber (3).
  12. Refrigeration appliance according to claim 10 or 11, characterised in that the sleeve (21, 28) surrounds the pipeline (15) without play at least in a region of the insulation material layer (13) facing away from the storage chamber (3).
  13. Refrigeration appliance according to one of the preceding claims, characterised in that an upstream section (8) of the water supply (7) is not resiliently expandable.
EP16194273.5A 2015-11-18 2016-10-18 Refrigeration device with water supply Active EP3171107B1 (en)

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CN110145907B (en) * 2019-05-17 2021-03-16 合肥美的电冰箱有限公司 Heating control method and device and ice maker
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EP3171107A1 (en) 2017-05-24
US20190301782A1 (en) 2019-10-03
US11112158B2 (en) 2021-09-07
DE102015222731A1 (en) 2017-05-18
US20170138656A1 (en) 2017-05-18

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