EP1327112A1 - Refrigerating device - Google Patents

Refrigerating device

Info

Publication number
EP1327112A1
EP1327112A1 EP01986339A EP01986339A EP1327112A1 EP 1327112 A1 EP1327112 A1 EP 1327112A1 EP 01986339 A EP01986339 A EP 01986339A EP 01986339 A EP01986339 A EP 01986339A EP 1327112 A1 EP1327112 A1 EP 1327112A1
Authority
EP
European Patent Office
Prior art keywords
air
interior
door
cooling device
cooling
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.)
Granted
Application number
EP01986339A
Other languages
German (de)
French (fr)
Other versions
EP1327112B1 (en
Inventor
Harald Kraus
Michael Neumann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1327112A1 publication Critical patent/EP1327112A1/en
Application granted granted Critical
Publication of EP1327112B1 publication Critical patent/EP1327112B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/023—Air curtain closures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/04—Doors; Covers with special compartments, e.g. butter conditioners
    • 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
    • F25D2317/062—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 along the inside of doors
    • 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
    • F25D2317/066—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 air supply
    • F25D2317/0665—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 air supply from the top

Definitions

  • the present invention relates to a cooling device, the interior of which is cooled at least in part with the aid of an air circulation device, sucks the air out of the interior, guides it over a cooling surface and then ejects it back into the interior via a plurality of air ejection openings formed on the inner surface of the housing.
  • a cooling device is e.g. known from EP 0 532 870 B1.
  • the object of the present invention is therefore to further develop the cooling device known from EP 532 870 B1 in the direction of a further reduction in the temperature gradient without increasing the power consumption of the air circulation device and thus the operation of the cooling device at lower cooling temperatures without the risk of damage to the refrigerated goods due to unwanted frost.
  • the object is achieved in that there is at least one among the plurality of air ejection openings which emits a cold air flow oriented from the inner surface to the center of the cooling space.
  • an air ejection opening in the area of the door can be used to generate an air flow oriented away from the door and obliquely into the interior of the cooling space be arranged.
  • This air discharge opening preferably extends over the entire width of the interior.
  • An air flow oriented in this way promotes in particular the mixing of the air in the area of the upper compartment of the interior.
  • an air ejection opening can also be designed to generate an air flow oriented parallel to the door.
  • Such an air flow promotes the exchange of air between different compartments of the interior, in particular when the air discharge opening is arranged above a gap between the front edges of a compartment floor of the interior and a compartment floor mounted on the door, in order to generate an air flow through this gap.
  • This air discharge opening should preferably also extend over the entire width of the interior.
  • the air ejection openings are expediently arranged on an ejection channel running under the ceiling of the cooling space.
  • This figure shows a cross section through the upper region of the housing and the door of a cooling device according to the invention.
  • the structure of this cooling device largely corresponds to that of the device known from EP 0 532 871 B1, so that the components of the device known from this document need only be mentioned briefly here.
  • the cooling device shown in the figure in a partial section has a thermally insulated housing 1, which can be closed with a door 2 on its front side.
  • the housing interior 3 is divided into a plurality of compartments by shelves 4 mounted on the housing walls.
  • An air circulation device comprises a cold air chimney 5, which essentially covers the entire rear wall of the interior 3 and of which one wall is formed by an evaporator plate connected to the coolant circuit of the cooling device. Air drawn in through suction openings in the lower region of the cold air chimney 5, driven by a blower, sweeps over the evaporator plate and finally reaches an exhaust duct 6, which extends under the ceiling of the interior 3 in the direction the door 2 extends.
  • a first group of air discharge openings 7 is arranged approximately halfway along the discharge duct 6; it generates a downward flow of cold air in the upper compartment of the interior 3, as indicated by the arrows P1.
  • a second group of discharge openings 8 extends over substantially the entire width of the interior 3, they are formed in this embodiment in an inclined wall surface of the discharge channel 6, so that they an obliquely downward and from the door 2 oriented air flow P2 in the Generate interior 3.
  • such an air flow could also be generated with the aid of obliquely oriented lamellae which are arranged in discharge openings which are formed on an otherwise essentially horizontal underside of the cold air duct.
  • a third group of ejection openings 9 closest to door 2 also extends over the entire width of interior 3.
  • Ejection openings 9 generate a flow of cold air in the form of a laminar curtain that runs along the inside of door 2 between the end edges of door 2 mounted shelves or on containers 11 and the facing end edges of shelves 4 mounted on the housing flows downwards.
  • This air flow P3 essentially has the function of cooling the door 2 and goods stored on the shelves 11 of the door 2.
  • the openings 7, 8, 9 and possibly the course of the free cross section of the discharge channel 6 are selected such that a large part of the cold air flow is expelled through the openings 7, 8.
  • These openings can have considerable cross sections which exceed the cross section of the channel 6 and can be equipped with flow resistances such as nonwoven mats so as to achieve an ejection speed of the air streams P1, P2 which is lower than the flow speed in the ejection channel 6.
  • Heat entered via the edges of the door 2 is also flushed by the air flow P3 into the central and in particular lower area of the interior 3, which is not shown in the figure, where the heated air is immediately sucked in by the suction openings of the cold air chimney 5 and cooled again.
  • the exhaust duct extended into the vicinity of door 2 has a functionally identical group of exhaust openings to the second group of exhaust openings 8, each of which has an air flow oriented approximately horizontally and at an angle of 45 ° to door 2 from both sides generate inside the compartment 10, as well as a functionally identical group of ejection openings to the third group of ejection openings 9, which face each other on both sides of the interior and each produce an air flow oriented obliquely downwards into the space between the floors 4, 11.
  • a group of air ejection openings analogous to group 7 extends diagonally from top to bottom over a central region of the ejection channel.
  • the diagonal orientation is intended to prevent a single tall item, e.g. a beverage carton can completely block such a group of discharge openings.

Landscapes

  • 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)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Polarising Elements (AREA)
  • Inorganic Insulating Materials (AREA)

Abstract

The invention relates to a refrigerating device comprising a refrigerated inner chamber (3) which is enclosed by a heat-insulating housing (1) and which can be closed by a door (2) at the front side thereof, and an air circulation device for sucking in air from the inner chamber (3), guiding the air over a cooling surface and re-ejecting the air cooled in this way into the inner chamber (3) by means of a plurality of ejection openings formed on the inner surface of the housing. At least one air ejection opening (7, 8, 9) releasing an air flow (P2, P3) which is oriented from the inner surface towards the centre of the refrigerating chamber is provided below the plurality of air ejection openings.

Description

Kühlgerät cooling unit
Die vorliegende Erfindung betrifft ein Kühlgerät, dessen Innenraum wenigstens zum Teil mit Hilfe einer Luftumwälzeinrichtung gekühlt ist, die Luft aus dem Innenraum absaugt, sie über eine Kühlfläche führt und anschließend über eine Mehrzahl von an der Innenfläche des Gehäuses ausgebildeten Luftausstoßöffnungen wieder in den Innenraum ausstößt. Ein solches Kühlgerät ist z.B. aus EP 0 532 870 B1 bekannt.The present invention relates to a cooling device, the interior of which is cooled at least in part with the aid of an air circulation device, sucks the air out of the interior, guides it over a cooling surface and then ejects it back into the interior via a plurality of air ejection openings formed on the inner surface of the housing. Such a cooling device is e.g. known from EP 0 532 870 B1.
Wenn in einem Kühlgerät ohne eine solche Luftumwälzeinrichtung Luft des Innenraums sich an einer Verdampferplatte der Rückwand abkühlt oder sich im Bereich der Tür erwärmt, so strömt die relativ dichte kalte Luft im Innenraum nach unten, während die warme sich oben ansammelt. Der daraus resultierende Temperaturgradient kann insbesondere bei großformatigen Kühlgeräten dazu führen, daß im oberen Bereich des Innenraums für eine optimale Lagerung geeignete Kältegrade nicht erreicht werden, wohingegen im unteren Bereich die Gefahr einer Beschädigung des Kühlgutes besteht, falls eine Temperatur von 0°C unterschritten wird. Durch eine Luftumwälzeinrichtung soll ein solcher Temperaturgradient begrenzt werden.If, in a cooling device without such an air circulation device, air in the interior cools down on an evaporator plate on the rear wall or heats up in the area of the door, the relatively dense cold air flows downward in the interior, while the warm air collects at the top. The resultant temperature gradient, particularly in the case of large-format refrigeration devices, can result in cold temperatures suitable for optimal storage not being achieved in the upper area of the interior, whereas in the lower area there is a risk of damage to the refrigerated goods if the temperature falls below 0 ° C. Such a temperature gradient is to be limited by an air circulation device.
Das Problem der Bekämpfung des Temperaturgradienten stellt sich im verstärkten Maße bei modernen Kühlgeräten mit einem sogenannten 0°-Fach, in denen Lebensmittel bei einer nur knapp über dem Gefrierpunkt liegenden Temperatur lange frisch gehalten werden sollen. Je näher diese Temperatur am Gefrierpunkt des Wassers ist, um so kleiner muß der Temperaturgradient sein, um Frostschäden am Kühlgut im unteren Bereich des Kühlfachs zu vermeiden. Diese Wirkung kann aber nicht durch eine einfache Erhöhung des Luftdurchsatzes der Umwälzeinrichtung herbeigeführt werden. Eine Erhöhung der Strömungsgeschwindigkeit in der Umwälzeinrichtung führt nicht nur zu einer erhöhten Leistungsaufnahme des Kühlgeräts; wie aus GB 950 091 bekannt ist, fördert eine hohe Strömungsgeschwindigkeit im Innenraum erheblich die Verdunstung von darin gelagerten Lebensmitteln und beeinträchtigt so deren Haltbarkeit. Bei der Konstruktion eines Kühlge- räts mit Luftumwälzeinrichtung liegt ein wesentliches Problem daher darin, einen ausreichend niedrigen Temperaturgradienten mit einer möglichst niedrigen Strömungsgeschwindigkeit im Innenraum zu erreichen. In dieser Beziehung hat sich die aus EP 0 532 870 B1 bekannte Konstruktion als verbesserungswürdig erwiesen, denn zusätzlich zu dem sich natürlicherweise einstellenden Temperaturgefälle im Innenraum von oben nach unten wurde auch eine Unterkühlung im Bereich der oberen Kante der Tür festgestellt, dort, wo sich üblicherweise das sogenannte „Butterfach" befindet.The problem of combating the temperature gradient arises to an increasing extent in modern cooling devices with a so-called 0 ° compartment, in which food is to be kept fresh for a long time at a temperature just above freezing point. The closer this temperature is to the freezing point of the water, the smaller the temperature gradient must be in order to avoid frost damage to the refrigerated goods in the lower area of the refrigerator compartment. However, this effect cannot be brought about by simply increasing the air throughput of the circulating device. An increase in the flow speed in the circulating device not only leads to an increased power consumption of the cooling device; As is known from GB 950 091, a high flow velocity in the interior significantly promotes the evaporation of food stored therein and thus impairs its shelf life. When designing a cooling device with an air circulation device, a major problem therefore lies in achieving a sufficiently low temperature gradient with the lowest possible flow velocity in the interior. In this regard, the construction known from EP 0 532 870 B1 has proven to be in need of improvement, because in addition to the naturally occurring temperature gradient in the interior from top to bottom, hypothermia was also found in the area of the upper edge of the door, where it is usual the so-called "butter compartment" is located.
Aufgabe der vorliegenden Erfindung ist daher, das aus EP 532 870 B1 bekannte Kühlgerät in Richtung einer weiteren Verringerung des Temperaturgradienten weiter zu entwickeln, ohne dabei den Leistungsverbrauch der Luftumwälzeinrichtung zu erhöhen und so den Betrieb des Kühlgeräts bei tieferen Kühltemperaturen ohne die Gefahr einer Schädigung von Kühlgut durch ungewollten Frost zu ermöglichen.The object of the present invention is therefore to further develop the cooling device known from EP 532 870 B1 in the direction of a further reduction in the temperature gradient without increasing the power consumption of the air circulation device and thus the operation of the cooling device at lower cooling temperatures without the risk of damage to the refrigerated goods due to unwanted frost.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß unter der Mehrzahl von Luftausstoßöffnungen sich wenigstens eine befindet, die einen von der Innenfläche zur Mitte des Kühlraums orientierten kalten Luftstrom abgibt.The object is achieved in that there is at least one among the plurality of air ejection openings which emits a cold air flow oriented from the inner surface to the center of the cooling space.
Durch das einfache Hinzufügen einer solchen Luftausstoßöffnung zu den bereits in EP 0 532 871 B1 gezeigten Luftausstoßöffnungen lässt sich bereits eine Reduzierung der Kältebelastung des Türbereichs bei gleichzeitig homogenerer Temperaturverteilung im Be- reich eines oberen Fachbodens des Kältegeräts erreichen.By simply adding such an air ejection opening to the air ejection openings already shown in EP 0 532 871 B1, a reduction in the cold load on the door area can be achieved with a more homogeneous temperature distribution in the area of an upper shelf of the refrigerator.
Je nach Ort der Anbringung der Luftausstoßöffnung an der Innenwand können unterschiedliche andere wünschenswerte Effekte einzeln oder in Kombination erzielt werden.Depending on the location of the air discharge opening on the inner wall, various other desirable effects can be obtained individually or in combination.
Durch Anbringung der Öffnung an der Decke des Innenraums wird erreicht, daß der austretende Kaltluftstrom nicht durch auf einem Fachboden ungünstig verteiltes Kühlgut blockiert werden kann. Außerdem kann so fallender Kaltluftstrom mit einer sehr niedrigen Strömungsgeschwindigkeit abgegeben werden, der sich auf dem darunterliegenden Fachboden allein aufgrund seiner relativ hohen Dichte in alle Richtungen verteilt und dar- auf aufgestelltes Kühlgut allseits umspült.By attaching the opening to the ceiling of the interior it is achieved that the escaping cold air flow cannot be blocked by refrigerated goods unfavorably distributed on a shelf. In addition, falling cold air flow can be emitted at a very low flow velocity, which is distributed in all directions on the underlying shelf solely due to its relatively high density and is washed around the refrigerated goods on all sides.
Alternativ oder ergänzend kann eine Luftausstoßöffnung im Bereich der Tür zur Erzeugung eines von der Tür fort und schräg ins Innere des Kühlraums orientierten Luftstroms angeordnet sein. Vorzugsweise erstreckt sich diese Luftausstoßöffnung über die gesamte Breite des Innenraums.Alternatively or additionally, an air ejection opening in the area of the door can be used to generate an air flow oriented away from the door and obliquely into the interior of the cooling space be arranged. This air discharge opening preferably extends over the entire width of the interior.
Ein in dieser Art orientierter Luftstrom fördert insbesondere die Durchmischung der Luft im Bereich des oberen Faches des Innenraums.An air flow oriented in this way promotes in particular the mixing of the air in the area of the upper compartment of the interior.
Alternativ, vorzugsweise ergänzend, kann auch eine Luftausstoßöffnung zur Erzeugung eines parallel zur Tür orientierten Luftstroms ausgelegt sein. Ein solcher Luftstrom fördert den Luftaustausch zwischen verschiedenen Fächern des Innenraums, insbesondere dann, wenn die Luftausstoßöffnung oberhalb eines Spalts zwischen den Vorderkanten eines Fachbodens des Innenraums und eines an der Tür montierten Fachbodens angeordnet ist, um einen Luftstrom durch diesen Spalt zu erzeugen. Auch diese Luftausstoßöffnung sollte sich vorzugsweise über die ganze Breite des Innenraums erstrecken.Alternatively, preferably additionally, an air ejection opening can also be designed to generate an air flow oriented parallel to the door. Such an air flow promotes the exchange of air between different compartments of the interior, in particular when the air discharge opening is arranged above a gap between the front edges of a compartment floor of the interior and a compartment floor mounted on the door, in order to generate an air flow through this gap. This air discharge opening should preferably also extend over the entire width of the interior.
Zweckmäßigerweise sind die Luftausstoßöffnungen an einem unter der Decke des Kühl- raumes verlaufenden Ausstoßkanal angeordnet.The air ejection openings are expediently arranged on an ejection channel running under the ceiling of the cooling space.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels mit Bezug auf die beigefügte Figur.Further features and advantages of the invention result from the following description of an embodiment with reference to the attached figure.
Diese Figur zeigt einen Querschnitt durch den oberen Bereich des Gehäuses und der Tür eines erfindungsgemäßen Kühlgeräts. Der Aufbau dieses Kühlgeräts entspricht weitgehend dem des aus EP 0 532 871 B1 bekannten Geräts, so daß die aus dieser Schrift bekannten Komponenten des Gerätes hier nur kurz erwähnt werden müssen.This figure shows a cross section through the upper region of the housing and the door of a cooling device according to the invention. The structure of this cooling device largely corresponds to that of the device known from EP 0 532 871 B1, so that the components of the device known from this document need only be mentioned briefly here.
Das in der Figur in einem partiellen Schnitt gezeigte Kühlgerät besitzt ein wärmeisoliertes Gehäuse 1, das an seiner Frontseite mit einer Tür 2 verschließbar ist. Der Gehäuseinnenraum 3 ist durch an den Gehäusewänden montierte Fachböden 4 in eine Mehrzahl von Fächern unterteilt. Eine Luftumwälzvorrichtung umfaßt einen Kaltluftkamin 5, der im wesentlichen die gesamte Rückwand des Innenraums 3 bedeckt und von dem eine Wand durch eine mit dem Kühlmittelkreislauf des Kühlgeräts verbundene Verdampferplatte gebildet ist. Durch Ansaugöffnungen im unteren Bereich des Kaltluftkamins 5 angesaugte Luft überstreicht, durch ein Gebläse angetrieben, die Verdampferplatte und erreicht schließlich einen Ausstoßkanal 6, der sich unter der Decke des Innenraums 3 in Richtung der Tür 2 erstreckt. Eine erste Gruppe von Luftausstoßöffnungen 7 ist in etwa auf halber Länge des Ausstoßkanals 6 angeordnet; sie erzeugt einen abwärtsgerichteten Kaltluftstrom im oberen Fach des Innenraums 3, wie durch die Pfeile P1 angedeutet. Eine zweite Gruppe von Ausstoßöffnungen 8 erstreckt sich über im wesentlichen die gesamte Breite des Innenraums 3, sie sind bei diesem Ausführungsbeispiel in einer schrägverlaufenden Wandfläche des Ausstoßkanals 6 gebildet, so daß sie einen schräg nach unten und von der Tür 2 fort orientierten Luftstrom P2 in den Innenraum 3 erzeugen. Ein solcher Luftstrom könnte einer nicht gezeichneten Variante zufolge auch mit Hilfe von schräg orientierten Lamellen erzeugt werden, die in Ausstoßöffnungen angeordnet sind, die an einer ansonsten im wesentlichen horizontalen Unterseite des Kaltluftkanals gebildet sind.The cooling device shown in the figure in a partial section has a thermally insulated housing 1, which can be closed with a door 2 on its front side. The housing interior 3 is divided into a plurality of compartments by shelves 4 mounted on the housing walls. An air circulation device comprises a cold air chimney 5, which essentially covers the entire rear wall of the interior 3 and of which one wall is formed by an evaporator plate connected to the coolant circuit of the cooling device. Air drawn in through suction openings in the lower region of the cold air chimney 5, driven by a blower, sweeps over the evaporator plate and finally reaches an exhaust duct 6, which extends under the ceiling of the interior 3 in the direction the door 2 extends. A first group of air discharge openings 7 is arranged approximately halfway along the discharge duct 6; it generates a downward flow of cold air in the upper compartment of the interior 3, as indicated by the arrows P1. A second group of discharge openings 8 extends over substantially the entire width of the interior 3, they are formed in this embodiment in an inclined wall surface of the discharge channel 6, so that they an obliquely downward and from the door 2 oriented air flow P2 in the Generate interior 3. According to a variant not shown, such an air flow could also be generated with the aid of obliquely oriented lamellae which are arranged in discharge openings which are formed on an otherwise essentially horizontal underside of the cold air duct.
Eine der Tür 2 am nächsten liegende dritte Gruppe von Ausstoßöffnungen 9 erstreckt sich ebenfalls über die gesamte Breite des Innenraums 3. Die Ausstoßöffnungen 9 erzeugen einen Kaltluftstrom in Form eines laminaren Vorhangs, der entlang der Innenseite der Tür 2 zwischen den Endkanten von an der Tür 2 montierten Fachböden oder an Behältern 11 und den zugewandten Endkanten von am Gehäuse montierten Fachböden 4 abwärts strömt. Dieser Luftstrom P3 hat im wesentlichen die Funktion, die Tür 2 und auf den Fachböden 11 der Tür 2 aufbewahrte Güter zu kühlen.A third group of ejection openings 9 closest to door 2 also extends over the entire width of interior 3. Ejection openings 9 generate a flow of cold air in the form of a laminar curtain that runs along the inside of door 2 between the end edges of door 2 mounted shelves or on containers 11 and the facing end edges of shelves 4 mounted on the housing flows downwards. This air flow P3 essentially has the function of cooling the door 2 and goods stored on the shelves 11 of the door 2.
Die Öffnungen 7, 8, 9 und gegebenenfalls der Verlauf des freien Querschnitts des Aus- stoßkanals 6 sind so gewählt, daß ein Großteil des Kaltluftstroms durch die Öffnungen 7, 8 ausgestoßen wird. Diese Öffnungen können beträchtliche Querschnitte aufweisen, die den Querschnitt des Kanals 6 übersteigen, und mit Strömungswiderständen wie etwa Vliesmatten ausgestattet sein, um so eine Ausstoßgeschwindigkeit der Luftströme P1 , P2 zu erreichen, die niedriger ist als die Strömungsgeschwindigkeit im Ausstoßkanal 6.The openings 7, 8, 9 and possibly the course of the free cross section of the discharge channel 6 are selected such that a large part of the cold air flow is expelled through the openings 7, 8. These openings can have considerable cross sections which exceed the cross section of the channel 6 and can be equipped with flow resistances such as nonwoven mats so as to achieve an ejection speed of the air streams P1, P2 which is lower than the flow speed in the ejection channel 6.
Über die Ränder der Tür 2 eingetragene Wärme wird von dem Luftstrom P3 in den in der Figur nicht dargestellten mittleren und insbesondere unteren Bereich des Innenraums 3 mitgespült, wo die erwärmte Luft alsbald von den Ansaugöffnungen des Kaltluftkamins 5 angesaugt und erneut abgekühlt wird.Heat entered via the edges of the door 2 is also flushed by the air flow P3 into the central and in particular lower area of the interior 3, which is not shown in the figure, where the heated air is immediately sucked in by the suction openings of the cold air chimney 5 and cooled again.
Es ist leicht einzusehen, daß durch den Luftstrom P3, der sich auf seinen Weg von oben nach unten im Innenraum erwärmt, der Ausbildung eines Temperaturgradienten wirksam vorgebeugt wird. Da dieser Strom durch den Zwischenraum zwischen den Fachböden 4 des Innenraums und den Fachböden 11 der Tür geführt ist, trifft er niemals direkt auf Kühlgut. Er kann deshalb eine höhere Strömungsgeschwindigkeit als andere Luftströme des Innenraums aufweisen, ohne daß dies zu einer unerwünschten Austrocknung von Kühlgut führt.It is easy to see that the formation of a temperature gradient is effectively prevented by the air flow P3 which heats up in the interior on its way from top to bottom. Since this current flows through the space between the shelves 4 of the interior and the shelves 11 of the door, it never meets directly with refrigerated goods. It can therefore have a higher flow rate than other air flows in the interior without this leading to undesired drying of the refrigerated goods.
Abweichend von der in der Figur dargestellten Ausgestaltung ist es auch möglich, den Ausstoßkanal 6 in ähnlicher Weise wie aus EP 0 532 870 B1 bekannt entlang der Seitenwände des oberen Fachs 10 zu führen. Der bis in die Nähe der Tür 2 verlängerte Ausstoßkanal besitzt in diesem Fall eine zur zweiten Gruppe von Ausstoßöffnungen 8 funktionsgleiche Gruppe von Ausstoßöffnungen, die jeweils von beiden Seiten her einen in et- wa horizontal und unter einem Winkel von 45° zur Tür 2 orientierten Luftstrom ins Innere des Fachs 10 erzeugen, sowie eine zur dritten Gruppe von Ausstoßöffnungen 9 funktionsgleiche Gruppe von Ausstoßöffnungen, die einander auf beiden Seiten des Innenraums zugewandt gegenüber liegen und jeweils einen schräg nach unten in den Zwischenraum zwischen den Böden 4, 11 orientierten Luftstrom erzeugen. Eine zur Gruppe 7 analoge Gruppe von Luftausstoßöffnungen erstreckt sich diagonal von oben nach unten über einen mittleren Bereich des Ausstoßkanals. Die diagonale Ausrichtung soll verhindern, daß ein einzelner auf dem Fachboden aufgestellter hoher Gegenstand, z.B. ein Getränkekarton, eine solche Gruppe von Ausstoßöffnungen komplett versperren kann. Deviating from the embodiment shown in the figure, it is also possible to guide the discharge channel 6 along the side walls of the upper compartment 10 in a manner similar to that known from EP 0 532 870 B1. In this case, the exhaust duct extended into the vicinity of door 2 has a functionally identical group of exhaust openings to the second group of exhaust openings 8, each of which has an air flow oriented approximately horizontally and at an angle of 45 ° to door 2 from both sides generate inside the compartment 10, as well as a functionally identical group of ejection openings to the third group of ejection openings 9, which face each other on both sides of the interior and each produce an air flow oriented obliquely downwards into the space between the floors 4, 11. A group of air ejection openings analogous to group 7 extends diagonally from top to bottom over a central region of the ejection channel. The diagonal orientation is intended to prevent a single tall item, e.g. a beverage carton can completely block such a group of discharge openings.

Claims

Patentansprüche claims
1. Kühlgerät mit einem von einem wärmeisolierten Gehäuse (1) umschlossenen und an seiner Frontseite durch eine Tür (2) verschließbaren gekühlten Innen- räum (3) und mit einer Luftumwälzeinrichtung zum Ansaugen von Luft aus dem1. Cooling device with a cooled interior (3) enclosed by a heat-insulated housing (1) and closable at the front by a door (2) and with an air circulation device for sucking air from the
Innenraum (3), Führen der Luft über eine Kühlfläche und Wiederausstoßen der so gekühlten Luft in den Innenraum (3) durch eine Mehrzahl von an der Innenfläche des Gehäuses ausgebildeten Luftausstoßöffnungen, dadurch gekennzeichnet, daß sich unter der Mehrzahl von Luftausstoßöffnungen wenigstens eine (7, 8, 9) befindet, die einen von der Innenfläche zur Mitte des Kühlraums orientiertenInterior (3), guiding the air via a cooling surface and re-ejecting the air cooled in this way into the interior (3) through a plurality of air ejection openings formed on the inner surface of the housing, characterized in that at least one (7, 8, 9), which is oriented from the inner surface to the center of the cooling space
Luftstrom (P2, P3) abgibt.Airflow (P2, P3) emits.
2. Kühlgerät nach Anspruch 1 , dadurch gekennzeichnet, daß wenigstens eine Luft- ausstoßöffnung (7, 9) an der Decke des Gehäuses angeordnet ist und einen fal- lenden Luftstrom abgibt.2. Cooling device according to claim 1, characterized in that at least one air discharge opening (7, 9) is arranged on the ceiling of the housing and emits a falling air flow.
3. Kühlgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß wenigstens eine Luftausstoßöffnung (8) für die Erzeugung eines von der Tür fort und schräg ins Innere des Innenraums (3) orientierten Luftstroms (P2) ausgelegt ist.3. Cooling device according to claim 1 or 2, characterized in that at least one air discharge opening (8) for the generation of a from the door and obliquely into the interior of the interior (3) oriented air flow (P2) is designed.
4. Kühlgerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens eine Luftausstoßöffnung (9) für die Erzeugung eines parallel zur Tür orientierten Luftstroms (P3) ausgelegt ist.4. Cooling device according to one of the preceding claims, characterized in that at least one air ejection opening (9) is designed for generating an air flow (P3) oriented parallel to the door.
5. Kühlgerät nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass sich die Luft- ausstoßöffnung (9) über die gesamte Breite des Innenraums (3) erstreckt.5. Cooling device according to claim 3 or 4, characterized in that the air discharge opening (9) extends over the entire width of the interior (3).
6. Kühlgerät nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Luftausstoßöffnung (9) oberhalb eines Spalts zwischen den Vorderkanten eines Fach- bodens (4) des Innenraums und eines Fachbodens (9) der Tür angeordnet ist. Kühlgerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Luftausstoßöffnungen (7, 8, 9) an einem unter der Decke des Innenraums (3) verlaufenden Ausstoßkanal (6) angeordnet sind. 6. Cooling device according to claim 4 or 5, characterized in that the air discharge opening (9) above a gap between the front edges of a shelf (4) of the interior and a shelf (9) of the door is arranged. Cooling device according to one of the preceding claims, characterized in that the air ejection openings (7, 8, 9) are arranged on an ejection channel (6) running under the ceiling of the interior (3).
EP01986339A 2000-10-06 2001-10-01 Refrigerating device Expired - Lifetime EP1327112B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10049574 2000-10-06
DE10049574A DE10049574A1 (en) 2000-10-06 2000-10-06 cooling unit
PCT/EP2001/011348 WO2002029339A1 (en) 2000-10-06 2001-10-01 Refrigerating device

Publications (2)

Publication Number Publication Date
EP1327112A1 true EP1327112A1 (en) 2003-07-16
EP1327112B1 EP1327112B1 (en) 2006-12-20

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EP01986339A Expired - Lifetime EP1327112B1 (en) 2000-10-06 2001-10-01 Refrigerating device

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EP (1) EP1327112B1 (en)
CN (1) CN1254652C (en)
AT (1) ATE348989T1 (en)
BR (1) BR0114243A (en)
DE (2) DE10049574A1 (en)
ES (1) ES2276846T3 (en)
WO (1) WO2002029339A1 (en)

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BR0301597A (en) * 2003-06-05 2005-03-22 Multibras Eletrodomesticos Sa Freezer compartment air distribution arrangement
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WO2012076453A2 (en) * 2010-12-10 2012-06-14 BSH Bosch und Siemens Hausgeräte GmbH Refrigeration appliance
WO2012076487A2 (en) 2010-12-10 2012-06-14 BSH Bosch und Siemens Hausgeräte GmbH Refrigeration appliance
CN102914116B (en) * 2011-07-31 2016-03-09 博西华家用电器有限公司 Refrigeration plant
CN102914119B (en) * 2011-07-31 2016-08-10 博西华家用电器有限公司 Refrigerating appliance

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Also Published As

Publication number Publication date
ATE348989T1 (en) 2007-01-15
CN1254652C (en) 2006-05-03
EP1327112B1 (en) 2006-12-20
CN1468359A (en) 2004-01-14
BR0114243A (en) 2003-10-07
ES2276846T3 (en) 2007-07-01
DE10049574A1 (en) 2002-04-11
DE50111705D1 (en) 2007-02-01
WO2002029339A1 (en) 2002-04-11

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