EP2691711B1 - Refrigerator having an axial fan - Google Patents

Refrigerator having an axial fan Download PDF

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Publication number
EP2691711B1
EP2691711B1 EP12709855.6A EP12709855A EP2691711B1 EP 2691711 B1 EP2691711 B1 EP 2691711B1 EP 12709855 A EP12709855 A EP 12709855A EP 2691711 B1 EP2691711 B1 EP 2691711B1
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EP
European Patent Office
Prior art keywords
air duct
plane
resting
refrigerator according
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP12709855.6A
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German (de)
French (fr)
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EP2691711A2 (en
Inventor
Wolfgang Nuiding
Reinhold Rosner
Simon Schechinger
Bernd Weiland
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP2691711A2 publication Critical patent/EP2691711A2/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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/063—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation with air guides
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/067—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by air ducts
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/067—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by air ducts
    • F25D2317/0671—Inlet ducts
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
    • 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
    • F25D2500/00—Problems to be solved
    • F25D2500/02—Geometry problems

Definitions

  • the present invention relates to a refrigeration appliance, in particular a household refrigerating appliance, with an axial fan which supplies a storage chamber of the refrigerating appliance with cold air.
  • the DE 10 2009 002644 A1 discloses a refrigerator according to the preamble of claim 1.
  • the blowing direction coincides with the direction of the rotation axis, so that the air flow generated, unless it is formed on surfaces outside of the axial fan, is substantially circular in cross-section.
  • such an air duct can hardly be accommodated in a domestic refrigeration appliance with the required cross-sectional area without severely restricting the usability of a storage chamber along which it extends.
  • the free cross section of the air duct and the cross section of the axial fan overlap only in a small area, and since the airfoils of the axial fan, when they sweep this area to move transversely to the axis, the air flow driven by the axial fan, when in the Air duct enters, an impulse not only in the direction of the fan axis, but according to the movement of the air blades and across it.
  • the consequence of this is that the air flow is distributed unevenly over the outlet of the air duct and distributed unevenly therefrom across the width of the storage chamber. This unequal distribution leads to a temperature gradient in the transverse direction of the storage chamber.
  • the object of the present invention is to provide a refrigeration device with an axial fan and an air duct adjoining the axial fan, in which temperature gradients going back to an uneven flow distribution in the air duct are completely or at least substantially suppressed in a storage chamber.
  • a refrigeration device in a refrigerator with an axial fan and an adjoining air duct, wherein an inlet of the air duct is offset from the axis of the fan in a first direction, the air duct with respect to a through the axis the fan extending and parallel to the direction of the offset plane is asymmetric. While the air driven by the axial fan in the air duct due to the offset of the cross sections of axial fan and air duct in the air duct preferably on one side of the plane, hereinafter referred to as the first side, urges, the asymmetry of such an unequal distribution can counteract.
  • the axis of the fan will usually be oriented in the depth direction of a storage chamber of the refrigerator, into which the air duct opens, and the plane extends vertically and in the depth direction of the storage chamber.
  • the effectiveness of the invention does not depend on the orientation of the fan axis and the offset in space.
  • the air duct increases in width from the inlet to an outlet at least transversely to the plane.
  • a part of the air duct lying on a first side of the plane is more strongly supplied with air from the axial fan than a part of the air channel lying on the opposite, second side of the plane, then should to compensate for lying on the first side of the plane part of the air duct have a higher flow resistance than the lying on the second side part.
  • the free cross-section of the first part of the air duct is smaller on at least part of its length than the free cross-section of the second part of the air duct.
  • the free cross section of the first part is preferably at most half as large as that of the second part.
  • the asymmetry defined above is particularly useful when the offset is so large that the axis of the fan does not pass through the inlet of the air duct.
  • the height of the air duct can then be constant in a cross-section perpendicular to the plane.
  • Another way to create the asymmetry is that the height of the air duct in a cross-section perpendicular to the plane is lower on the first side than on the second. This results in the ability to bring the outlet of the air channel on both sides of the plane up to the side walls of the storage chamber, so that over the entire width of the storage chamber distributed air curtain can be obtained directly at the outlet of the air duct.
  • the air duct may further include internal flow directors arranged to urge air from the first to the second side of the plane.
  • Fig. 1 shows in a schematic cross section the upper portion of an inner container 1, which is part of a body of a household refrigerator together with an insulating foam layer surrounding its outer sides.
  • the complete housing of the household refrigeration appliance comprises, in addition to the body, a door which is hinged thereto and from which an inner wall 2, which is deep-drawn like the inner container 1 made of plastic, is shown partially in the figure.
  • Inner container 1 and inner wall 2 delimit an inner space which is divided by partitions 5, 6 parallel to a rear wall 3 or a ceiling 4 of the inner container 1 into a storage chamber 7 for refrigerated goods, a fan chamber 8 mounted at a corner between ceiling 4 and rear wall 3 a suction channel 9 extending along the rear wall 3 and a distribution channel 10 extending below the ceiling 4.
  • An evaporator may be provided in the Distribution channel 10 or a (not shown) evaporator chamber at the upstream (here: lower) end of the intake duct 9 be housed.
  • the evaporator chamber can in turn be separated from the interior of the inner container 1 or, in particular in the case of a combination refrigerator with a plurality of storage chambers 7, be separated within another inner container.
  • the fan chamber 8 includes an axial fan 11 of a known type, with a cuboid frame 12, in whose round passage opening, a rotor 13 with air blades 14 is rotationally driven about a fan axis 15 to push air from the intake passage 9 in the distribution channel 10.
  • the partition wall 6 extends over the entire width of the ceiling 4 from one side wall of the inner container 1 to the other and has at its rear edge in the middle a downwardly directed recess 16 which largely covers the free cross section of the axial fan 11 to the air flow driven by it deflect upward and supply an inlet 17 of the distribution channel 10, which extends above the fan axis 15. A portion of the air flow passing through the axial fan 11 below the fan axis 15 is deflected much more strongly prior to entry into the distribution channel 10 and accordingly more damped than a portion of the air flow passing through the axial fan 11 above the fan axis 15.
  • the contribution of the latter to the air flow in the distribution channel 10 is stronger, and the direction in which the air blades 14 move above the fan axis 15 has an influence on the distribution of the air flow in the distribution channel 10. If the direction of rotation of the rotor 13 is, for example, left-handed , then results in a preferred direction of the air flow in the distribution channel 10, as indicated by an arrow 18 in Fig. 2 indicated.
  • the air flow to the right deflecting guide ribs 27 cause the flow velocity at the outlet 24 in the vicinity of the median plane 21 is significantly higher than in the vicinity of the side wall 23, so by the deflection of the air flow at the Inner wall 2 of the door on both sides of the median plane 21 an approximately equal air flow is obtained, which flows along the inner wall 2 downwards and away from the median plane 21, so that at a sufficient distance from the outlet 24 over the entire width of the inner wall 2 distributed, the storage chamber evenly flushing air flow is obtained.
  • the height of the distribution channel 10 is constant in the width direction of the inner container 1 from one boundary wall 22 to the other 25 and continuously decreases from the inlet 17 to the outlet 24 to a substantially constant free cross-sectional area despite the width of the distribution channel 10 increasing towards the door guarantee.
  • Fig. 3 shows you one Fig. 2 analog section according to a second embodiment of the invention.
  • boundary walls 22 ', 25' extend symmetrically on both sides of the center plane 21 and reach the height of the outlet 24, the side walls 23, 26 of the inner container 1.
  • the distribution channel 10 in this embodiment as well as in Fig. 1 is shown offset relative to the fan axis 15 upwards, the air flow at the inlet 17 of the distribution channel 10 is also unevenly distributed and extends predominantly in the left of the median plane 21 extending portion 19.
  • the height of the distribution channel 10 in cross-section perpendicular to the median plane 21 variable is the height of the distribution channel 10 in cross-section perpendicular to the median plane 21 variable, as in Fig.
  • the height of the distribution channel 10 here decreases continuously from right to left across the width of the inner container 1 away.
  • the cross-sectional modulation is achieved here in that the thickness of the underside horizontal partition wall 6 increases from right to left. It would also be conceivable, however, to provide a cross-sectionally horizontal dividing wall 6 of constant thickness, and instead to form the ceiling 4 of the inner container 1 slightly obliquely, sloping from right to left.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die vorliegende Erfindung betrifft ein Kältegerät, insbesondere ein Haushaltskältegerät, mit einem Axiallüfter, der eine Lagerkammer des Kälteieräts mit Kaltluft versorgt. Die DE 10 2009 002644 A1 offenbart ein Kältegerät gemäß dem Oberbegriff des Anspruchs 1.The present invention relates to a refrigeration appliance, in particular a household refrigerating appliance, with an axial fan which supplies a storage chamber of the refrigerating appliance with cold air. The DE 10 2009 002644 A1 discloses a refrigerator according to the preamble of claim 1.

Bei einem Axiallüfter fällt die Blasrichtung mit der Richtung der Drehachse zusammen, so dass der erzeugte Luftstrom, soweit er nicht an Oberflächen außerhalb des Axiallüfters umgeformt wird, im Querschnitt im Wesentlichen kreisrund ist. Um Strömungsverluste zu minimieren, wäre es an sich zweckmäßig, den Luftstrom in einem Luftkanal gleichen Querschnitts zu führen. Ein solcher Luftkanal ist jedoch in einem Haushaltskältegerät kaum mit der benötigten Querschnittsfläche unterzubringen, ohne die Nutzbarkeit einer Lagerkammer, an der er sich entlang erstreckt, empfindlich einzuschränken. Es ist daher gebräuchlich, einen Axiallüfter in einem Innenraum eines Kältegerätegehäuses an einer von dessen Rückwand und Decke gebildeten Ecke mit in Tiefenrichtung des Gehäuses orientierter Achse anzubringen und einen Luftkanal, der sich von dem Axiallüfter aus zu einem Auslass in der Nähe einer Tür des Kältegerätegehäuses erstreckt, durch eine sich im Wesentlichen parallel zur Decke erstreckende Zwischenwand zu begrenzen, die sich in Höhe der Achse des Axiallüfters oder sogar darüber erstreckt. Der freie Querschnitt des Luftkanals und der Querschnitt des Axiallüfters überschneiden sich daher nur in einem kleinen Bereich, und da die Luftschaufeln des Axiallüfters, wenn sie diesen Bereich überstreichen, sich quer zur Achse bewegen, hat die von dem Axiallüfter angetriebene Luftströmung, wenn sie in den Luftkanal eintritt, einen Impuls nicht nur in Richtung der Lüfterachse, sondern entsprechend der Bewegung der Luftschaufeln auch quer dazu. Die Folge hieraus ist, dass die Luftströmung auch über den Auslass des Luftkanals ungleichmäßig verteilt ist und sich von dort aus ungleichmäßig über die Breite der Lagerkammer verteilt. Diese Ungleichverteilung führt zu einem Temperaturgradienten in Querrichtung der Lagerkammer.In an axial fan, the blowing direction coincides with the direction of the rotation axis, so that the air flow generated, unless it is formed on surfaces outside of the axial fan, is substantially circular in cross-section. In order to minimize flow losses, it would be expedient to guide the air flow in an air duct of the same cross-section. However, such an air duct can hardly be accommodated in a domestic refrigeration appliance with the required cross-sectional area without severely restricting the usability of a storage chamber along which it extends. It is therefore common practice to mount an axial fan in an interior of a refrigeration appliance housing on a corner formed by its rear wall and ceiling with an axis oriented in the depth direction of the housing and an air passage extending from the axial fan to an outlet in the vicinity of a door of the refrigeration appliance housing to be limited by an essentially parallel to the ceiling extending intermediate wall which extends in the amount of the axis of the axial fan or even above. Therefore, the free cross section of the air duct and the cross section of the axial fan overlap only in a small area, and since the airfoils of the axial fan, when they sweep this area to move transversely to the axis, the air flow driven by the axial fan, when in the Air duct enters, an impulse not only in the direction of the fan axis, but according to the movement of the air blades and across it. The consequence of this is that the air flow is distributed unevenly over the outlet of the air duct and distributed unevenly therefrom across the width of the storage chamber. This unequal distribution leads to a temperature gradient in the transverse direction of the storage chamber.

Um eine Mindestlagerdauer eines Kühlguts in der Lagerkammer unabhängig von dessen genauem Aufenthaltsort in der Lagerkammer spezifizieren zu können, muss die Temperatur in der gesamten Lagerkammer einen vorgegebenen Wert unterschreiten. Wenn jedoch die Lagerkammer einen Temperaturgradienten aufweist, und selbst der wärmste Ort der Lagerkammer diese vorgegebene Temperatur unterschreiten muss, dann folgt daraus, dass es andere Orte in der Lagerkammer gibt, deren Temperatur weit unter dem vorgegebenen Wert liegt und die kühl zu halten eine hohe Kühlleistung erfordert. Im Interesse der Energieeffizienz sollten daher Temperaturgradienten in der Lagerkammer möglichst niedrig gehalten werden.In order to be able to specify a minimum storage duration of a chilled product in the storage chamber, regardless of its exact location in the storage chamber, the temperature in the entire storage chamber must fall below a predetermined value. However, if the storage chamber has a temperature gradient, and even the warmest place of the storage chamber must fall below this predetermined temperature, then It follows that there are other places in the storage chamber, whose temperature is far below the given value and to keep cool requires a high cooling capacity. In the interests of energy efficiency, therefore, temperature gradients in the storage chamber should be kept as low as possible.

Aufgabe der vorliegenden Erfindung ist, ein Kältegerät mit einem Axiallüfter und einem an den Axiallüfter anschließenden Luftkanal zu schaffen, bei dem auf eine ungleichmäßigen Strömungsverteilung im Luftkanal zurückgehende Temperaturgradienten in einer Lagerkammer vollständig oder wenigstens weitgehend unterdrückt sind.The object of the present invention is to provide a refrigeration device with an axial fan and an air duct adjoining the axial fan, in which temperature gradients going back to an uneven flow distribution in the air duct are completely or at least substantially suppressed in a storage chamber.

Die Aufgabe wird durch ein Kältegerät gemäß Anspruch 1 gelöst, indem bei einem Kältegerät mit einem Axiallüfter und einem daran anschließenden Luftkanal, wobei ein Einlass des Luftkanals gegen die Achse des Lüfters in einer ersten Richtung versetzt ist, der Luftkanal in Bezug auf eine durch die Achse des Lüfters verlaufende und zur Richtung des Versatzes parallele Ebene asymmetrisch ist. Während die vom Axiallüfter angetriebene Luft im Luftkanal aufgrund des Versatzes der Querschnitte von Axiallüfter und Luftkanal in dem Luftkanal bevorzugt auf eine Seite der Ebene, im Folgenden als erste Seite bezeichnet, drängt, kann die Asymmetrie einer solchen Ungleichverteilung entgegenwirken.The object is achieved by a refrigeration device according to claim 1, wherein in a refrigerator with an axial fan and an adjoining air duct, wherein an inlet of the air duct is offset from the axis of the fan in a first direction, the air duct with respect to a through the axis the fan extending and parallel to the direction of the offset plane is asymmetric. While the air driven by the axial fan in the air duct due to the offset of the cross sections of axial fan and air duct in the air duct preferably on one side of the plane, hereinafter referred to as the first side, urges, the asymmetry of such an unequal distribution can counteract.

In der Praxis wird die Achse des Lüfters meist in Tiefenrichtung einer Lagerkammer des Kältegeräts orientiert sein, in die der Luftkanal einmündet, und die Ebene verläuft vertikal und in Tiefenrichtung der Lagerkammer. Zur Vereinfachung des Verständnisses der Erfindung soll im Folgenden von einer solchen Orientierung ausgegangen werden, obwohl sich versteht, dass sich die Wirksamkeit der Erfindung von der Orientierung der Lüfterachse und des Versatzes im Raum nicht abhängt.In practice, the axis of the fan will usually be oriented in the depth direction of a storage chamber of the refrigerator, into which the air duct opens, and the plane extends vertically and in the depth direction of the storage chamber. To simplify the understanding of the invention, it will be assumed hereinafter of such an orientation, although it is understood that the effectiveness of the invention does not depend on the orientation of the fan axis and the offset in space.

Um eine gleichmäßige Verteilung der durch den Luftkanal strömenden Luft in der Lagerkammer zu erzielen, ist es zweckmäßig, wenn der Luftkanal vom Einlass zu einem Auslass hin zumindest quer zu der Ebene an Breite zunimmt.In order to achieve a uniform distribution of the air flowing through the air duct in the storage chamber, it is expedient if the air duct increases in width from the inlet to an outlet at least transversely to the plane.

Wenn, wie oben erwähnt, ein auf einer ersten Seite der Ebene liegender Teil des Luftkanals von dem Axiallüfter stärker mit Luft beaufschlagt ist als ein auf der entgegengesetzten, zweiten Seite der Ebene liegender Teil des Luftkanals, dann sollte zum Ausgleich der auf der ersten Seite der Ebene liegende Teil des Luftkanals einen höheren Strömungswiderstand aufweisen als der auf der zweiten Seite liegende Teil.If, as mentioned above, a part of the air duct lying on a first side of the plane is more strongly supplied with air from the axial fan than a part of the air channel lying on the opposite, second side of the plane, then should to compensate for lying on the first side of the plane part of the air duct have a higher flow resistance than the lying on the second side part.

Dies kann in erster Linie dadurch erreicht werden, dass der freie Querschnitt des ersten Teils des Luftkanals auf wenigstens einem Teil seiner Länge kleiner ist als der freie Querschnitt des zweiten Teils des Luftkanals. Vorzugsweise ist hierfür in wenigstens einer zu der Ebene senkrechten Schnittebene der freie Querschnitt des ersten Teils höchstens halb so groß wie der des zweiten Teils.This can be achieved primarily in that the free cross-section of the first part of the air duct is smaller on at least part of its length than the free cross-section of the second part of the air duct. For this purpose, in at least one sectional plane perpendicular to the plane, the free cross section of the first part is preferably at most half as large as that of the second part.

Je flacher und weiter gegen die Lüfterachse versetzt der Luftkanal ist, umso stärker muss im Allgemeinen die Asymmetrie des Luftkanals sein, um eine symmetrische Luftverteilung in der Lagerkammer zu erzielen. Daher ist die oben definierte Asymmetrie insbesondere dann zweckmäßig, wenn der Versatz so groß ist, dass die Achse des Lüfters nicht durch den Einlass des Luftkanals verläuft.The flatter and further away from the fan axis the air duct is, the more generally the asymmetry of the air duct must be in order to achieve a symmetrical air distribution in the bearing chamber. Therefore, the asymmetry defined above is particularly useful when the offset is so large that the axis of the fan does not pass through the inlet of the air duct.

Unter Fertigungsgesichtspunkten ist es besonders einfach, die benötigte Asymmetrie dadurch herzustellen, dass ein Auslass des Luftkanals von einer Seitenwand der Lagerkammer auf der ersten Seite der Ebene weiter beabstandet ist als von einer Seitenwand auf der zweiten Seite der Ebene. Eine solche Asymmetrie ist durch geeignet geformte seitliche Begrenzungswände des Luftkanals leicht realisierbar.From a manufacturing point of view, it is particularly easy to produce the required asymmetry by disposing an outlet of the air channel farther from a side wall of the storage chamber on the first side of the plane than from a side wall on the second side of the plane. Such asymmetry is easily realized by suitably shaped lateral boundary walls of the air duct.

Die Höhe des Luftkanals kann dann in einem zu der Ebene senkrechten Querschnitt konstant sein.The height of the air duct can then be constant in a cross-section perpendicular to the plane.

Eine andere Möglichkeit, die Asymmetrie zu erzeugen, ist, dass die Höhe des Luftkanals in einem zu der Ebene senkrechten Querschnitt auf der ersten Seite geringer als auf der zweiten ist. Daraus ergibt sich die Möglichkeit, den Auslass des Luftkanals auf beiden Seiten der Ebene bis an die Seitenwände der Lagerkammer heranzuführen, sodass ein über die gesamte Breite der Lagerkammer verteilter Luftvorhang bereits unmittelbar am Auslass des Luftkanals erhalten werden kann.Another way to create the asymmetry is that the height of the air duct in a cross-section perpendicular to the plane is lower on the first side than on the second. This results in the ability to bring the outlet of the air channel on both sides of the plane up to the side walls of the storage chamber, so that over the entire width of the storage chamber distributed air curtain can be obtained directly at the outlet of the air duct.

Der Luftkanal kann ferner interne Strömungsleitelemente aufweisen, die angeordnet sind, um Luft von der ersten auf die zweite Seite der Ebene zu drängen.The air duct may further include internal flow directors arranged to urge air from the first to the second side of the plane.

Weitere Vorteile der Erfindung werden deutlich anhand der nachfolgenden Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die beigefügten Figuren. Aus dieser Beschreibung und den Figuren gehen auch Merkmale derFurther advantages of the invention will become apparent from the following description of embodiments with reference to the accompanying figures. From this description and the figures are also features of the

Ausführungsbeispiele hervor, die nicht in den Ansprüchen erwähnt sind. Solche Merkmale können auch in anderen als den hier spezifisch offenbarten Kombinationen auftreten. Die Tatsache, dass mehrere solche Merkmale in einem gleichen Satz oder in einer anderen Art von Textzusammenhang miteinander erwähnt sind, rechtfertigt daher nicht den Schluss, dass sie nur in der spezifisch offenbarten Kombination auftreten können; stattdessen ist grundsätzlich davon auszugehen, dass von mehreren solchen Merkmalen auch einzelne weggelassen oder abgewandelt werden können, sofern dies die Funktionsfähigkeit der Erfindung nicht in Frage stellt. Es zeigen:

Fig. 1
einen schematischen Teilschnitt durch ein erfindungsgemäßes Kältegerät entlang einer vertikal und in Tiefenrichtung des Kältegerätegehäuses orientierten Schnittebene;
Fig. 2
einen horizontalen Schnitt entlang der Ebene II-II aus Fig. 1;
Fig. 3
einen zu Fig. 2 analogen Schnitt gemäß einer zweiten Ausgestaltung der Erfindung; und
Fig. 4
einen Schnitt entlang der zur Lüfterachse senkrechten Ebene IV-IV der Fig. 3.
Embodiments, which are not mentioned in the claims. Such features may also occur in combinations other than those specifically disclosed herein. Therefore, the fact that several such features are mentioned in the same sentence or in a different type of textual context does not justify the conclusion that they can occur only in the specific combination disclosed; instead, it is generally to be assumed that it is also possible to omit or modify individual ones of several such features, provided this does not call into question the functionality of the invention. Show it:
Fig. 1
a schematic partial section through an inventive refrigerator along a vertical and in the depth direction of the refrigerator housing oriented cutting plane;
Fig. 2
a horizontal section along the plane II-II Fig. 1 ;
Fig. 3
one too Fig. 2 analog section according to a second embodiment of the invention; and
Fig. 4
a section along the plane perpendicular to the fan axis level IV-IV of Fig. 3 ,

Fig. 1 zeigt in einem schematischen Querschnitt den oberen Bereich eines Innenbehälters 1, der zusammen mit einer seine Außenseiten umgebenden isolierenden Schaumstoffschicht Teil eines Korpus eines Haushaltskältegerätes ist. Das vollständige Gehäuse des Haushaltskältegerätes umfasst außer dem Korpus noch eine daran angeschlagene Tür, von der eine wie der Innenbehälter 1 aus Kunststoff tiefgezogene Innenwand 2 in der Figur partiell dargestellt ist. Innenbehälter 1 und Innenwand 2 begrenzen einen Innenraum, der durch zu einer Rückwand 3 bzw. einer Decke 4 des Innenbehälters 1 parallele Trennwände 5, 6 unterteilt ist in eine Lagerkammer 7 für Kühlgut, eine an einer Ecke zwischen Decke 4 und Rückwand 3 angebrachte Lüfterkammer 8, einen sich entlang der Rückwand 3 erstreckenden Ansaugkanal 9 und einen unterhalb der Decke 4 verlaufenden Verteilerkanal 10. Ein Verdampfer kann in dem Verteilerkanal 10 oder einer (nicht dargestellten) Verdampferkammer am stromaufwärtigen (hier: unteren) Ende des Ansaugkanals 9 untergebracht sein. Die Verdampferkammer kann ihrerseits von dem Innenraum des Innenbehälters 1 abgeteilt oder, insbesondere im Falle eines Kombinationskältegerätes mit mehreren Lagerkammern 7, innerhalb eines anderen Innenbehälters abgeteilt sein. Fig. 1 shows in a schematic cross section the upper portion of an inner container 1, which is part of a body of a household refrigerator together with an insulating foam layer surrounding its outer sides. The complete housing of the household refrigeration appliance comprises, in addition to the body, a door which is hinged thereto and from which an inner wall 2, which is deep-drawn like the inner container 1 made of plastic, is shown partially in the figure. Inner container 1 and inner wall 2 delimit an inner space which is divided by partitions 5, 6 parallel to a rear wall 3 or a ceiling 4 of the inner container 1 into a storage chamber 7 for refrigerated goods, a fan chamber 8 mounted at a corner between ceiling 4 and rear wall 3 a suction channel 9 extending along the rear wall 3 and a distribution channel 10 extending below the ceiling 4. An evaporator may be provided in the Distribution channel 10 or a (not shown) evaporator chamber at the upstream (here: lower) end of the intake duct 9 be housed. The evaporator chamber can in turn be separated from the interior of the inner container 1 or, in particular in the case of a combination refrigerator with a plurality of storage chambers 7, be separated within another inner container.

Die Lüfterkammer 8 enthält einen Axiallüfter 11 von an sich bekannter Bauart, mit einem quaderförmigen Rahmen 12, in dessen runder Durchgangsöffnung ein Rotor 13 mit Luftschaufeln 14 um eine Lüfterachse 15 drehangetrieben ist, um Luft aus dem Ansaugkanal 9 in den Verteilerkanal 10 zu drücken.The fan chamber 8 includes an axial fan 11 of a known type, with a cuboid frame 12, in whose round passage opening, a rotor 13 with air blades 14 is rotationally driven about a fan axis 15 to push air from the intake passage 9 in the distribution channel 10.

Die Trennwand 6 erstreckt sich über die gesamte Breite der Decke 4 von einer Seitenwand des Innenbehälters 1 zur anderen und weist an ihrem rückwärtigen Rand mittig eine abwärts gerichtete Ausbuchtung 16 auf, die den freien Querschnitt des Axiallüfters 11 großenteils überdeckt, um den von ihm angetriebenen Luftstrom nach oben abzulenken und einem Einlass 17 des Verteilerkanals 10 zuzuführen, der sich oberhalb der Lüfterachse 15 erstreckt. Ein Teil des Luftstroms, der den Axiallüfter 11 unterhalb der Lüfterachse 15 passiert, wird vor dem Eintritt in den Verteilerkanal 10 wesentlich stärker abgelenkt und dementsprechend stärker gedämpft als ein Teil des Luftstroms, der den Axiallüfter 11 oberhalb der Lüfterachse 15 passiert. Dementsprechend ist der Beitrag des letzteren zum Luftstrom im Verteilerkanal 10 stärker, und die Richtung, in der sich die Luftschaufeln 14 oberhalb der Lüfterachse 15 bewegen, hat einen Einfluss auf die Verteilung des Luftstroms im Verteilerkanal 10. Wenn der Drehsinn des Rotors 13 beispielsweise linkshändig ist, dann resultiert daraus eine Vorzugsrichtung des Luftstroms im Verteilerkanal 10, wie durch einen Pfeil 18 in Fig. 2 angedeutet.The partition wall 6 extends over the entire width of the ceiling 4 from one side wall of the inner container 1 to the other and has at its rear edge in the middle a downwardly directed recess 16 which largely covers the free cross section of the axial fan 11 to the air flow driven by it deflect upward and supply an inlet 17 of the distribution channel 10, which extends above the fan axis 15. A portion of the air flow passing through the axial fan 11 below the fan axis 15 is deflected much more strongly prior to entry into the distribution channel 10 and accordingly more damped than a portion of the air flow passing through the axial fan 11 above the fan axis 15. Accordingly, the contribution of the latter to the air flow in the distribution channel 10 is stronger, and the direction in which the air blades 14 move above the fan axis 15 has an influence on the distribution of the air flow in the distribution channel 10. If the direction of rotation of the rotor 13 is, for example, left-handed , then results in a preferred direction of the air flow in the distribution channel 10, as indicated by an arrow 18 in Fig. 2 indicated.

Vom Axiallüfter 11 aus gesehen ist der Luftstrom in einem Teil 19 des Verteilerkanals 10 links von einer durch die Lüfterachse 15 verlaufenden Mittelebene 21 des Innenbehälters 1 (der Querschnittebene der Fig. 1) stärker als in einem rechts von ihr liegenden Teil 20. Dieser Tatsache wird Rechnung getragen, indem eine seitliche Begrenzungswand 22 des Verteilerkanals 10 auf der rechten Seite der Mittelebene 21 sich mit zunehmender Entfernung vom Axiallüfter 11 einer Seitenwand 23 des Innenbehälters 1 annähert und diese in Höhe eines Auslasses 24 des Verteilerkanals 10 erreicht, wohingegen eine entsprechende Begrenzungswand 25 links von der Mittelebene 21 in Höhe des Auslasses 24 eine Entfernung von der linken Seitenwand 26 aufweist, die etwa einem Drittel der Breite des Innenbehälters 1 entspricht. Dies sowie in den Verteilerkanal 10 von unten hineinragende, den Luftstrom nach rechts ablenkende Führungsrippen 27 bewirken, dass die Strömungsgeschwindigkeit am Auslass 24 in der Nähe der Mittelebene 21 deutlich höher ist als in der Nähe der Seitenwand 23, sodass durch die Umlenkung des Luftstroms an der Innenwand 2 der Tür auf beiden Seiten der Mittelebene 21 ein in etwa gleich starker Luftstrom erhalten wird, der entlang der Innenwand 2 abwärts und von der Mittelebene 21 fort strömt, so dass in einem ausreichenden Abstand von dem Auslass 24 ein über die gesamte Breite der Innenwand 2 verteilter, die Lagerkammer gleichmäßig durchspülender Luftstrom erhalten wird.Seen from the axial fan 11, the air flow in a part 19 of the distribution channel 10 to the left of a running through the fan axis 15 center plane 21 of the inner container 1 (the cross-sectional plane of Fig. 1 ) This fact is taken into account by a lateral boundary wall 22 of the distribution channel 10 on the right side of the center plane 21 with increasing distance from the axial fan 11 of a side wall 23 of the inner container 1 approaches and these in Height of an outlet 24 of the distribution channel 10 is reached, whereas a corresponding boundary wall 25 to the left of the center plane 21 at the level of the outlet 24 has a distance from the left side wall 26, which corresponds to about one third of the width of the inner container 1. This as well as in the distribution channel 10 projecting from below, the air flow to the right deflecting guide ribs 27 cause the flow velocity at the outlet 24 in the vicinity of the median plane 21 is significantly higher than in the vicinity of the side wall 23, so by the deflection of the air flow at the Inner wall 2 of the door on both sides of the median plane 21 an approximately equal air flow is obtained, which flows along the inner wall 2 downwards and away from the median plane 21, so that at a sufficient distance from the outlet 24 over the entire width of the inner wall 2 distributed, the storage chamber evenly flushing air flow is obtained.

Die Höhe des Verteilerkanals 10 ist in Breitenrichtung des Innenbehälters 1 von einer Begrenzungswand 22 zur anderen 25 konstant und nimmt vom Einlass 17 zum Auslass 24 hin kontinuierlich leicht ab, um trotz der zur Tür hin zunehmenden Breite des Verteilerkanals 10 eine im Wesentlichen gleichbleibende freie Querschnittsfläche zu gewährleisten.The height of the distribution channel 10 is constant in the width direction of the inner container 1 from one boundary wall 22 to the other 25 and continuously decreases from the inlet 17 to the outlet 24 to a substantially constant free cross-sectional area despite the width of the distribution channel 10 increasing towards the door guarantee.

Fig. 3 zeigt einen zu Fig. 2 analogen Schnitt gemäß einer zweiten Ausgestaltung der Erfindung. Bei dieser Ausgestaltung verlaufen Begrenzungswände 22', 25' symmetrisch beiderseits der Mittelebene 21 und erreichen in Höhe des Auslasses 24 die Seitenwände 23, 26 des Innenbehälters 1. Da der Verteilerkanal 10 bei dieser Ausgestaltung genauso wie in Fig. 1 gezeigt relativ zur Lüfterachse 15 nach oben versetzt ist, ist auch hier die Luftströmung am Einlass 17 des Verteilerkanals 10 ungleichmäßig verteilt und verläuft überwiegend in den sich links von der Mittelebene 21 erstreckenden Teil 19. Um dies auszugleichen und einen Teil der Luft in den Teil 20 rechts von der Mittelebene 21 abzulenken, ist hier die Höhe des Verteilerkanals 10 im Querschnitt senkrecht zur Mittelebene 21 variabel, wie in Fig. 4 am Beispiel eines Schnitts entlang der Linie IV-IV der Fig. 3 gezeigt. Die Höhe des Verteilerkanals 10 nimmt hier von rechts nach links über die Breite des Innenbehälters 1 hinweg kontinuierlich ab. Die Querschnittsmodulation ist hier dadurch erzielt, dass die Dicke der unterseits horizontalen Trennwand 6 von rechts nach links zunimmt. Denkbar wäre aber auch, eine im Querschnitt horizontale Trennwand 6 von gleichbleibender Dicke vorzusehen, und stattdessen die Decke 4 des Innenbehälters 1 leicht schräg, von rechts nach links abschüssig, zu formen. Fig. 3 shows you one Fig. 2 analog section according to a second embodiment of the invention. In this embodiment, boundary walls 22 ', 25' extend symmetrically on both sides of the center plane 21 and reach the height of the outlet 24, the side walls 23, 26 of the inner container 1. Since the distribution channel 10 in this embodiment as well as in Fig. 1 is shown offset relative to the fan axis 15 upwards, the air flow at the inlet 17 of the distribution channel 10 is also unevenly distributed and extends predominantly in the left of the median plane 21 extending portion 19. To compensate for this and a portion of the air in the part 20th deflect the right of the median plane 21, here is the height of the distribution channel 10 in cross-section perpendicular to the median plane 21 variable, as in Fig. 4 the example of a section along the line IV-IV of Fig. 3 shown. The height of the distribution channel 10 here decreases continuously from right to left across the width of the inner container 1 away. The cross-sectional modulation is achieved here in that the thickness of the underside horizontal partition wall 6 increases from right to left. It would also be conceivable, however, to provide a cross-sectionally horizontal dividing wall 6 of constant thickness, and instead to form the ceiling 4 of the inner container 1 slightly obliquely, sloping from right to left.

Da bei dieser Ausgestaltung der Auslass 24 des Verteilerkanals beide Seitenwände 23, 26 des Innenbehälters 1 erreicht, ist ein Luftstrom von gleichmäßig verteilter Stärke über die gesamte Breite der Innenwand 2 hinweg unmittelbar ab dem Auslass 24 realisierbar.Since in this embodiment the outlet 24 of the distributor channel reaches both side walls 23, 26 of the inner container 1, an air flow of uniformly distributed thickness over the entire width of the inner wall 2 can be realized directly from the outlet 24.

Claims (10)

  1. Refrigerator, in particular household refrigerator, having an axial fan (11) and an air duct (10) coupled to the axial fan (11) in a fluidic fashion, with an inlet (17) which is offset against the axis (15) of the fan (11) in a first direction, characterised in that the air duct (10) is asymmetrical in respect of a plane (21) proceeding through the axis (15) of the axial fan (11) and parallel to the direction of the offset.
  2. Refrigerator according to claim 1, characterised in that the plane (21) is a vertical centre plane of a storage chamber (7) which proceeds in the depth direction, into which storage chamber the air duct (10) discharges.
  3. Refrigerator according to claim 1 or 2, characterised in that the air duct (10) increases in terms of depth from the inlet (17) to the outlet (24) at least transversely relative to the plane (21)
  4. Refrigerator according to one of the preceding claims, characterised in that a part (19) of the air duct (10) resting on a first side of the plane (21) is exposed to more air from the axial fan (11) than a part (20) of the air duct (10) resting on the opposite, second side of the plane (21) and the part (19) of the air duct resting on the first side of the plane (21) has a greater flow resistance than the part (20) of the air duct resting on the second side.
  5. Refrigerator according to one of the preceding claims, characterised in that the free cross-section of the part (19) of the air duct (10) resting on the first side over at least one part of its length is smaller than the free cross-section of the part (20) of the air duct resting on the second side.
  6. Refrigerator according to claim 5, characterised in that in at least one sectional plane of the free cross-section of the part (19) resting on the first side is half as large as the part (20) resting on the second part, said free cross-section being at right angles to the plane (21).
  7. Refrigerator according to claim 5 or 6, if related back to claim 2, characterised in that an outlet (24) of the air duct (10) is further distanced from a side wall (26) of the storage chamber (7) on the first side than from a side wall (23) of the storage chamber (7) on the second side.
  8. Refrigerator according to claim 5, 6 or 7, characterised in that the height of the air duct (10) is constant in a cross-section which is at right angles to the plane (21).
  9. Refrigerator according to claim 5 or 6, characterised in that the height of the air duct in a cross-section at right angles to the plane (21) is smaller on the first side (19) than on the second (20).
  10. Refrigerator according to one of the preceding claims, characterised in that the air duct (10) has internal flow conducting elements (27), which are arranged so as to push air from the first side to the second side of the plane (21).
EP12709855.6A 2011-03-28 2012-03-15 Refrigerator having an axial fan Not-in-force EP2691711B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011006244A DE102011006244A1 (en) 2011-03-28 2011-03-28 Refrigeration unit with axial fan
PCT/EP2012/054571 WO2012130624A2 (en) 2011-03-28 2012-03-15 Refrigerator having an axial fan

Publications (2)

Publication Number Publication Date
EP2691711A2 EP2691711A2 (en) 2014-02-05
EP2691711B1 true EP2691711B1 (en) 2015-07-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12709855.6A Not-in-force EP2691711B1 (en) 2011-03-28 2012-03-15 Refrigerator having an axial fan

Country Status (4)

Country Link
EP (1) EP2691711B1 (en)
CN (1) CN103459951B (en)
DE (1) DE102011006244A1 (en)
WO (1) WO2012130624A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105737483B (en) * 2014-12-12 2019-08-09 博西华电器（江苏）有限公司 Refrigerating appliance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1220755B (en) * 1988-06-08 1990-06-21 Zanussi A Spa Industrie REFRIGERANT APPLIANCE WITH AT LEAST ONE COMPARTMENT AT UNIFORM TEMPERATURE AND HIGH RELATIVE HUMIDITY
US4938034A (en) * 1989-05-03 1990-07-03 Hill Refrigeration Corporation Opened front refrigerated display case
JP2002318054A (en) * 2001-04-20 2002-10-31 Fujitsu General Ltd Refrigerator
CN1265100C (en) * 2002-04-15 2006-07-19 乐金电子(天津)电器有限公司 Cross flow fan
CN1453540A (en) * 2003-05-29 2003-11-05 上海交通大学 Directly cooling refrigerator with forced convective refrigerating compartment
DE102009002644A1 (en) * 2009-04-24 2010-10-28 BSH Bosch und Siemens Hausgeräte GmbH Refrigeration unit with blower
DE102009003263A1 (en) * 2009-05-20 2010-11-25 BSH Bosch und Siemens Hausgeräte GmbH No-frost refrigerating appliance

Also Published As

Publication number Publication date
CN103459951B (en) 2016-02-17
DE102011006244A1 (en) 2012-10-04
WO2012130624A3 (en) 2012-11-22
EP2691711A2 (en) 2014-02-05
CN103459951A (en) 2013-12-18
WO2012130624A2 (en) 2012-10-04

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