EP2126488A2 - Refrigerating appliance comprising an ice-making machine - Google Patents

Refrigerating appliance comprising an ice-making machine

Info

Publication number
EP2126488A2
EP2126488A2 EP07847448A EP07847448A EP2126488A2 EP 2126488 A2 EP2126488 A2 EP 2126488A2 EP 07847448 A EP07847448 A EP 07847448A EP 07847448 A EP07847448 A EP 07847448A EP 2126488 A2 EP2126488 A2 EP 2126488A2
Authority
EP
European Patent Office
Prior art keywords
water
ice
temperature
refrigerating appliance
cold
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
EP07847448A
Other languages
German (de)
French (fr)
Other versions
EP2126488B1 (en
Inventor
Adolf Feinauer
Jan Steinar Eikaas
Sten Ove JÖRGENSEN
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 EP2126488A2 publication Critical patent/EP2126488A2/en
Application granted granted Critical
Publication of EP2126488B1 publication Critical patent/EP2126488B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice
    • F25C1/08—Producing ice by immersing freezing chambers, cylindrical bodies or plates into water
    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice
    • F25C1/18—Producing ice of a particular transparency or translucency, e.g. by injecting air
    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2400/00—Auxiliary features or devices for producing, working or handling ice
    • F25C2400/10—Refrigerator units
    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2400/00—Auxiliary features or devices for producing, working or handling ice
    • F25C2400/14—Water supply
    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25C2700/14—Temperature of water

Definitions

  • the invention relates to a refrigerator according to the preamble of claim 1.
  • cold fingers dip into a certain volume of water, which is usually in a shell. These cold fingers have a temperature below the freezing point on the surface. The water begins to freeze on the cold fingers and successively build up a layer of ice around the cold finger. As the use of cold fingers in the water volume enters cold, comes within the water volume to form layers that have different temperatures and therefore different densities. These layers and densities lead to the fact that the freezing process of the clear ice is undefined and thus can not be ruled out that further Eiskristallisationskeime form in the water near the cold finger. The freezing process in the ice layer is therefore uncontrolled and thus forms cloudy ice. To avoid this formation of a cloudy ice, the water is mechanically, usually by means of stirrer, moves, which are connected to an electric motor.
  • the invention is therefore based on the object to equip a refrigeration device with a Klareisrer that noise and vibration can be avoided and the components used have little or no susceptibility to interference.
  • the object is achieved according to the invention by a refrigerator with the features of claim 1.
  • the water in the shell at least in places, a temperature of more than 12 ° C. If now the cold fingers; which have a temperature below the freezing point, come into contact with this tempered water, is due to the temperature difference convection. This convection causes a circulation in the water. The water on the cold fingers is cooled and sinks towards the ground. By this cold water displaced warmer water rises to the top. Thus, there is a water circulation, which is the stronger, the more the temperature differs between the cold fingers and the surrounding water. Due to the low temperature, an ice layer forms on the cold fingers, which grows into the warmer water.
  • the water which is supplied to the dish for clarification has a temperature above 12 ° C
  • the water is heated in an advantageous manner by a heater.
  • This heater could be located near the bottom of the shell into which the cold fingers dip. The water circulation in the shell is then driven not only by the cooling of the water to the cold fingers, but in addition by the heating of the heater.
  • the heater could also be thermally conductively connected to the outside of the shell.
  • the heater is located in a separate water tank.
  • the water is heated to a certain temperature and then pumped into the shell, in which the clear ice is prepared.
  • This water tank preferably has a water connection equipped with level sensor, so that there is always enough water in the water tank.
  • a temperature sensor is advantageously provided in the water tank.
  • This temperature sensor now makes it possible, with the help of a controller, not only to determine the temperature of the water, but also to switch the heating elements so that, after reaching the predetermined water temperature, this temperature can be kept within narrow limits.
  • the water temperature is between 15 ° C and 30 0 C. An increase in the water temperature above 30 0 C must be avoided due to energetic considerations. Also, at temperatures exceeding 30 ° C, the minerals dissolved in the water begin to precipitate. This in turn would lead to a clouding of the ice.
  • a temperature in the water of the water tank of less than 15 ° C causes the water, after it has been pumped into the shell for clarification, not be able to sustain the convection long enough. As a result, when convection has almost come to a standstill, the growth of the ice layer is uncontrolled and turbidity forms in the clear ice.
  • the water temperature which is kept in the water tank, made dependent on the mineral content of the water used.
  • the mineral content of a water can be determined on the one hand on the conductivity of the water and is defined on the other hand on the total hardness of the water.
  • the water hardness must be determined and adjusted accordingly for the installation of the refrigerator, preferably on the control of Klareishneers. This controller then selects the temperature to which the water in the water tank is heated.
  • the setting of the water temperature can also be fully automatic.
  • the conductivity of the water can be measured by electrodes that are located in the water tank. The values determined here can then be transmitted directly to the controller which calculates the temperature from which the water must be heated.
  • the temperature at the cold fingers is not less than -6 0 C.
  • a lower temperature causes the formation of ice runs uncontrolled, since the water cools around the cold fingers too fast. As already described above in another context, this leads at least to unwanted cloudy spots in the clear.
  • the temperature at the cold fingers is not more than -2 ° C.
  • a temperature of more than -2 ° C causes the already acting as an isolator, already formed ice layer on its outside can not be cooled below freezing. As a result, the ice layer would not continue to grow. This effect occurs before the clear ice has reached a usable size.
  • Fig. 1 shows schematically a refrigerator with a refrigerator compartment, ice maker and
  • Fresh water tank and Fig. 2 is a schematic drawing of the fresh water tank and the ice maker
  • FIG. 1 shows a refrigerator 1 with an open door 2 and an interior 3.
  • the interior 3 is divided into a refrigerator 4 and a freezer 5.
  • the refrigerator 4 is usually adjustable by at least one height Shelf 6 divided.
  • In the refrigerator 4 is an icemaker. 7
  • the ice maker 7 is divided into a technology module 8, an ice tray 9 and a water tank designed as a fresh water tank 10.
  • the fresh water tank 10 may also be located outside of the cooled interior 3.
  • FIG. 2 shows schematically the ice maker with technology module 8 and fresh water tank 10.
  • the fresh water tank 10 is filled with drinking water 1 1, which is supplied to the fresh water tank 10 via a fresh water line 12.
  • a level switch 13 and a fresh water valve 14 are connected to an ice maker control 19. When a certain level is reached in the fresh water tank 10, the fresh water valve 14 is closed due to the information provided by the level switch 13 information.
  • the fresh water tank 10 can be completely emptied if necessary via a sewer line 15.
  • the wastewater valve 16 is actuated.
  • This waste water valve 16 is also connected to the ice maker control 19.
  • an electric heater 17 which heats the drinking water 1 1 to a predetermined temperature.
  • the temperature depends on the mineral content of the drinking water 1 1. The higher the mineral content in drinking water 1 1, the more the drinking water 1 1 must be heated.
  • the temperature level is preferably between 15 ° C and 30 0 C. An increase in the temperature of the drinking water 1 1 above 30 0 C leads to a precipitation of minerals.
  • the temperature that currently has the drinking water 1 1 is detected by a temperature sensor 18 and forwarded to the ice maker control 19, which then controls the electric heater 17 accordingly.
  • the tempered drinking water 1 1 is by means of a pump 20 via the Connecting line 21 promoted in the ice maker tray 22 of the technology module 8.
  • the pump 20 is driven by the ice maker control 19.
  • dip cold fingers 23 which preferably have a temperature of -2 ° C to -6 ° C, wherein this temperature is maintained with great accuracy at the surface of the cold finger 23.
  • the temperature difference between the cold fingers 23 and the tempered water which is preferably between 20 0 C and 30 0 C, generates sufficient convection in the area of the cold finger 23 to reliably avoid the emergence of turbid spots in the ice cubes 24.
  • the clear ice cubes 23 are deposited after their preparation in the ice tray 9 and are ready for removal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Production, Working, Storing, Or Distribution Of Ice (AREA)

Abstract

The invention relates to a refrigerating appliance (1) comprising an inner region (3) for storing refrigerated goods or frozen goods, and a crystal ice-making machine (7) arranged in the inner region (3) and comprising cooled refrigerating fingers (23) which are immersed into a trough (20) filled with water. According to the invention, the temperature of the water in the trough is higher than 12°C at least at certain points.

Description

Kältegerät mit einem Eisbereiter Refrigeration device with an icemaker
Die Erfindung betrifft ein Kältegerät nach dem Oberbegriff von Anspruch 1 .The invention relates to a refrigerator according to the preamble of claim 1.
Es ist bekannt, im Kühlraum von Kältegeräten Eisbereiter anzuordnen. Hierbei kommen zum einen Eisbereiter zum Einsatz, die mit Wasser gefüllt und von Außen gekühlt werden, wobei das Wasser von Außen nach Innen gefriert und dabei schließlich einen Eiswürfel ergibt. Ferner gibt es so genannte Klareisbereiter, bei denen eine Mehrzahl von Kühlfingern in einen mit Wasser gefüllten Behälter eintaucht. Durch Zirkulation eines Kältemittels im Inneren der Eisfinger werden diese so abgekühlt, dass an den in das Wasser eintauchenden Kühlfingern eine Eisschicht wächst. Sobald die Eisschicht an den Kühlfingern eine gebrauchsfertige Größe erreicht hat, wird sie von den Kühlfingern gelöst. Ein derartiger Klareisbereiter ist in der DE 103 36 834 A1 beschrieben. Derartige Eisbereiter werden im Allgemeinen im Kühlfach einer Kühl-Gefrier-Kombination eingebaut.It is known to arrange ice makers in the cold room of refrigerators. Here, on the one hand ice makers are used, which are filled with water and cooled from the outside, the water freezes from the outside to the inside and finally results in an ice cube. Furthermore, there are so-called Klareisbereiter, in which a plurality of cold fingers immersed in a container filled with water. By circulating a refrigerant inside the ice fingers, they are cooled so that an ice layer grows on the cold fingers immersed in the water. As soon as the ice layer on the cold fingers has reached a ready-to-use size, it is released from the cold fingers. Such Klareisbereiter is described in DE 103 36 834 A1. Such ice makers are generally installed in the refrigerated compartment of a refrigerator-freezer.
Es gibt diese Art von Eisbereitern in einer Vielzahl von Ausführungsformen. Dazu gehören vollautomatische Ausführungen, die an eine Frischwasserleitung angeschlossen werden und die das nach der Eisbereitung im Behälter zurückbleibende Wasser selbständig in die Abwasserleitung pumpen. Der Vorteil dieser Eisbereiter liegt in der einfachen Anwendung, indem sozusagen auf Knopfdruck Klareis produziert wird. Diese Art der Ausführung setzt jedoch voraus, dass an dem Ort, an dem das Kältegerät aufgestellt werden soll, eine Zu- und Abwasserleitung vorhanden ist.There are these types of ice makers in a variety of embodiments. These include fully automatic versions, which are connected to a fresh water line and pump the remaining after the ice in the container water independently in the sewer. The advantage of these ice makers is the ease of use, producing clear ice, so to speak, at the push of a button. However, this type of execution requires that at the place where the refrigerator is to be set up, an inlet and sewer line is present.
Zur Herstellung von Klareis tauchen so genannte Kältefinger in ein bestimmtes Volumen an Wasser ein, das sich in der Regel in einer Schale befindet. Diese Kältefinger besitzen an der Oberfläche eine Temperatur unterhalb des Gefrierpunktes. Das Wasser beginnt nun an den Kältefingern zu gefrieren und sukzessive eine Eisschicht um den Kältefinger aufzubauen. Da der Einsatz der Kältefinger in das Wasservolumen Kälte einträgt, kommt es innerhalb des Wasservolumens zur Bildung von Schichten, die unterschiedliche Temperaturen und damit unterschiedliche Dichten besitzen. Diese Schichten und Dichten führen dazu, dass der Gefrierprozess des Klareises Undefiniert wird und damit nicht auszuschließen ist, dass sich im Wasser nahe der Kältefinger weitere Eiskristallisationskeime bilden. Der Gefrierprozess in der Eisschicht verläuft deshalb unkontrolliert und bildet somit trübes Eis. Um diese Bildung einer trüben Eisschicht zu vermeiden, wird das Wasser mechanisch, meist mittels Rührer, bewegt, die mit einem Elektromotor verbunden sind.To produce clear ice, so-called cold fingers dip into a certain volume of water, which is usually in a shell. These cold fingers have a temperature below the freezing point on the surface. The water begins to freeze on the cold fingers and successively build up a layer of ice around the cold finger. As the use of cold fingers in the water volume enters cold, comes within the water volume to form layers that have different temperatures and therefore different densities. These layers and densities lead to the fact that the freezing process of the clear ice is undefined and thus can not be ruled out that further Eiskristallisationskeime form in the water near the cold finger. The freezing process in the ice layer is therefore uncontrolled and thus forms cloudy ice. To avoid this formation of a cloudy ice, the water is mechanically, usually by means of stirrer, moves, which are connected to an electric motor.
Es hat sich jedoch gezeigt, dass diese mechanischen Systeme, die das Wasser im Bereich der Kältefinger in Bewegung halten, störanfällig sind. Zudem entwickeln sie Geräusche und Vibrationen.However, it has been shown that these mechanical systems that keep the water moving in the area of the cold fingers are prone to failure. They also develop sounds and vibrations.
Der Erfindung liegt deshalb die Aufgabe zugrunde, ein Kältegerät so mit einem Klareisbereiter auszustatten, dass Geräusche und Vibrationen vermieden werden und die verwendeten Bauteile keine oder nur eine geringe Störanfälligkeit aufweisen.The invention is therefore based on the object to equip a refrigeration device with a Klareisbereiter that noise and vibration can be avoided and the components used have little or no susceptibility to interference.
Gelöst wird die Aufgabe gemäß der Erfindung durch ein Kältegerät mit den Merkmalen von Anspruch 1. Erfindungsgemäß weist das Wasser in der Schale zumindest stellenweise eine Temperatur von mehr als 12°C auf. Wenn nun die Kältefinger; die eine Temperatur unterhalb des Gefrierpunktes besitzen, in Kontakt mit diesem temperierten Wasser kommen, setzt aufgrund der Temperaturdifferenz eine Konvektion ein. Diese Konvektion sorgt dafür, dass sich in dem Wasser eine Zirkulation ergibt. Das Wasser an den Kältefingern wird abgekühlt und sinkt Richtung Boden. Durch dieses kalte Wasser verdrängte wärmere Wasser steigt nach oben. Somit ergibt sich eine Wasserzirkulation, die umso stärker ausfällt, je mehr die Temperatur zwischen den Kältefingern und dem umgebenden Wasser differiert. An den Kältefingern bildet sich aufgrund der niederen Temperatur eine Eisschicht, die in das wärmere Wasser hineinwächst. Da das Wasser aufgrund seiner Wärme immer um den Kältefinger zirkuliert, bilden sich im Wasser keine Kristallisationskeime für eine Undefinierte Eisbildung, die eine Trübung der Eisschicht bedeuten würde. Das Wachstum der klaren Eisschicht dauert so lange, bis sich an den Kältefingern Klareis in gebrauchsfähiger Größe gebildet hat. Dieses Klareis wird in einer separaten Eisschale durch kurzzeitiges Erwärmen der Kältefinger abgelegt.The object is achieved according to the invention by a refrigerator with the features of claim 1. According to the invention, the water in the shell, at least in places, a temperature of more than 12 ° C. If now the cold fingers; which have a temperature below the freezing point, come into contact with this tempered water, is due to the temperature difference convection. This convection causes a circulation in the water. The water on the cold fingers is cooled and sinks towards the ground. By this cold water displaced warmer water rises to the top. Thus, there is a water circulation, which is the stronger, the more the temperature differs between the cold fingers and the surrounding water. Due to the low temperature, an ice layer forms on the cold fingers, which grows into the warmer water. Since the water always circulates around the cold finger due to its heat, no crystallization nuclei form in the water for an undefined formation of ice, which is a clouding of the ice layer would mean. The growth of the clear ice layer lasts until clear ice of usable size has formed on the cold fingers. This clear ice is stored in a separate ice tray by briefly heating the cold fingers.
Da nicht immer sichergestellt werden kann, dass das Wasser, das der Schale zur Klareisbereitung zugeführt wird, eine Temperatur über 12°C aufweist, wird das Wasser in vorteilhafter Weise durch eine Heizeinrichtung erwärmt. Diese Heizeinrichtung könnte sich innerhalb der Schale, in die die Kältefinger eintauchen, in Bodennähe befinden. Die Wasserzirkulation in der Schale wird dann nicht nur durch die Abkühlung des Wassers an den Kältefingern, sondern zusätzlich durch die Aufheizung an der Heizeinrichtung angetrieben.Since it can not always be ensured that the water which is supplied to the dish for clarification, has a temperature above 12 ° C, the water is heated in an advantageous manner by a heater. This heater could be located near the bottom of the shell into which the cold fingers dip. The water circulation in the shell is then driven not only by the cooling of the water to the cold fingers, but in addition by the heating of the heater.
Wenn die Schale wärmeleitfähig ist, könnte die Heizeinrichtung auch mit der Außenseite der Schale wärmeleitend verbunden werden. Eine Heizeinrichtung, die das in der Schale befindliche Wasser möglichst punktuell erwärmt, bewirkt folglich einerseits genügend Konvektion zur Klareisherstellung, andererseits hält es den Wärmeeintrag in den gekühlten Innenraum des Kältegeräts gering.If the shell is thermally conductive, the heater could also be thermally conductively connected to the outside of the shell. A heater which heats the water in the shell as selectively as possible, therefore, on the one hand causes sufficient convection for Klareisherstellung, on the other hand it keeps the heat input into the cooled interior of the refrigerator low.
In besonders vorteilhafter weise befindet sich die Heizeinrichtung in einem separaten Wassertank. Hier wird das Wasser auf eine bestimmte Temperatur aufgeheizt und dann in die Schale gepumpt, in der das Klareis bereitet wird. Dieser Wassertank verfügt vorzugsweise über einen mit Niveausensor ausgestatteten Wasseranschluss, so dass immer genügend Wasser im Wassertank vorhanden ist.In a particularly advantageous manner, the heater is located in a separate water tank. Here, the water is heated to a certain temperature and then pumped into the shell, in which the clear ice is prepared. This water tank preferably has a water connection equipped with level sensor, so that there is always enough water in the water tank.
Damit die Temperatur, auf die das Wasser in dem Wassertank erwärmt wird, ermittelt werden kann, ist vorteilhafterweise in dem Wassertank ein Temperatursensor vorgesehen. Dieser Temperatursensor ermöglicht es nun unter Hinzuziehung einer Steuerung, die Temperatur des Wassers nicht nur zu ermitteln, sondern auch die Heizelemente so zu schalten, dass nach dem Erreichen der vorgegebenen Wassertemperatur diese Temperatur in engen Grenzen gehalten werden kann. In vorteilhafter weise beträgt die Wassertemperatur zwischen 15°C und 300C. Eine Erhöhung der Wassertemperatur über 300C muss aufgrund energetischer Betrachtungen vermieden werden. Auch beginnen bei Temperaturen, die mehr als 30°C betragen, die im Wasser gelösten Mineralien auszufallen. Dies würde wiederum zu einer Trübung des Eises führen.In order that the temperature to which the water in the water tank is heated can be determined, a temperature sensor is advantageously provided in the water tank. This temperature sensor now makes it possible, with the help of a controller, not only to determine the temperature of the water, but also to switch the heating elements so that, after reaching the predetermined water temperature, this temperature can be kept within narrow limits. Advantageously, the water temperature is between 15 ° C and 30 0 C. An increase in the water temperature above 30 0 C must be avoided due to energetic considerations. Also, at temperatures exceeding 30 ° C, the minerals dissolved in the water begin to precipitate. This in turn would lead to a clouding of the ice.
Eine im Wasser des Wassertanks erzeugte Temperatur von weniger als 15°C führt dazu, dass das Wasser, nachdem es in die Schale zur Klareisbereitung gepumpt wurde, die Konvektion nicht lange genug aufrechterhalten kann. Das führt dazu, dass - wenn die Konvektion nahezu zum Erliegen gekommen ist - das Wachstum der Eisschicht unkontrolliert verläuft und sich Trübungen im Klareis bilden.A temperature in the water of the water tank of less than 15 ° C causes the water, after it has been pumped into the shell for clarification, not be able to sustain the convection long enough. As a result, when convection has almost come to a standstill, the growth of the ice layer is uncontrolled and turbidity forms in the clear ice.
In besonders vorteilhafter Weise wird die Wassertemperatur, die in dem Wassertank vorgehalten wird, von dem Mineraliengehalt des verwendeten Wassers abhängig gemacht. Je mehr Mineralien im Wasser gelöst sind, desto höher muss die Temperatur sein, auf die das Wasser im Wassertank erwärmt wird. Der Mineraliengehalt eines Wassers lässt sich zum einen über die Leitfähigkeit des Wassers bestimmen und ist zum anderen über die Gesamthärte des Wassers definiert.In a particularly advantageous manner, the water temperature, which is kept in the water tank, made dependent on the mineral content of the water used. The more minerals are dissolved in the water, the higher must be the temperature to which the water in the water tank is heated. The mineral content of a water can be determined on the one hand on the conductivity of the water and is defined on the other hand on the total hardness of the water.
Um die Einstellungsvielfalt, die sich aus der Anzahl der Gesamthärten ergibt, für den Anwender zu reduzieren, können diese - analog zu Geschirrspülmaschinen - in Klassen zusammengefasst werden z: B. weich - mittel - hart. Nun muss für den Aufstellort des Kältegerätes die Wasserhärte ermittelt und entsprechend eingestellt werden, vorzugsweise an der Steuerung des Klareisbereiters. Diese Steuerung wählt dann die Temperatur, auf die das Wasser im Wassertank erwärmt wird.In order to reduce the variety of settings, which results from the number of total hardnesses, for the user, they can be grouped into classes - eg, dishwashers - eg soft - medium - hard. Now, the water hardness must be determined and adjusted accordingly for the installation of the refrigerator, preferably on the control of Klareisbereiters. This controller then selects the temperature to which the water in the water tank is heated.
Die Einstellung der Wassertemperatur kann aber auch vollautomatisch erfolgen. Hierzu lässt sich die Leitfähigkeit des Wassers durch Elektroden messen, die sich im Wassertank befinden. Die hier ermittelten Werte können dann direkt an die Steuerung übermittelt werden, die hieraus die Temperatur errechnet, auf die das Wasser erwärmt werden muss.The setting of the water temperature can also be fully automatic. For this purpose, the conductivity of the water can be measured by electrodes that are located in the water tank. The values determined here can then be transmitted directly to the controller which calculates the temperature from which the water must be heated.
In vorteilhafter Weise beträgt die Temperatur an den Kältefingern nicht weniger als -60C. Eine geringere Temperatur führt dazu, dass die Eisbildung unkontrolliert verläuft, da sich das Wasser um die Kältefinger zu schnell abkühlt. Wie bereits oben in anderem Zusammenhang beschrieben, führt dies mindestens zu ungewollten trüben Stellen im Klareis. Für eine Klareisproduktion ohne trübe Stellen ist es zudem erforderlich, dass die Temperatur an der Oberfläche der Kältefinger über den Bereich, der mit dem Wasser in Berührung steht, sehr gleichmäßig ist.Advantageously, the temperature at the cold fingers is not less than -6 0 C. A lower temperature causes the formation of ice runs uncontrolled, since the water cools around the cold fingers too fast. As already described above in another context, this leads at least to unwanted cloudy spots in the clear. For a clear ice production without turbid areas, it is also necessary that the temperature at the surface of the cold finger over the area that is in contact with the water, is very uniform.
In vorteilhafter Weise beträgt die Temperatur an den Kältefingern nicht mehr als -2°C. Eine Temperatur, die mehr als -2°C beträgt, führt dazu, dass die als Isolator wirkende, bereits entstandene Eisschicht an ihrer Außenseite nicht mehr unter den Gefrierpunkt abgekühlt werden kann. Dadurch würde die Eisschicht nicht weiter wachsen. Dieser Effekt tritt ein, bevor das Klareis eine gebrauchsfähige Größe erreicht hat.Advantageously, the temperature at the cold fingers is not more than -2 ° C. A temperature of more than -2 ° C causes the already acting as an isolator, already formed ice layer on its outside can not be cooled below freezing. As a result, the ice layer would not continue to grow. This effect occurs before the clear ice has reached a usable size.
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus den Unteransprüchen im Zusammenhang mit der Beschreibung eines Ausführungsbeispiels, das anhand der Zeichnung eingehend erläutert wird.Further details and advantages of the invention will become apparent from the subclaims in connection with the description of an embodiment which is explained in detail with reference to the drawing.
Es zeigen:Show it:
Fig. 1 schematisch ein Kältegerät mit Kühlfach, Eisbereiter undFig. 1 shows schematically a refrigerator with a refrigerator compartment, ice maker and
Frischwasserbehälter und Fig. 2 eine Schemazeichnung des Frischwasserbehälters und des EisbereitersFresh water tank and Fig. 2 is a schematic drawing of the fresh water tank and the ice maker
Figur 1 zeigt ein Kältegerät 1 mit geöffneter Tür 2 und einem Innenraum 3. Der Innenraum 3 teilt sich in einen Kühlraum 4 und ein Gefrierfach 5 auf. Aus Übersichtlichkeitsgründen ist an dem Gefrierfach 5 keine Verschlussklappe dargestellt. Der Kühlraum 4 wird in der Regel durch mindestens einen in der Höhe verstellbaren Fachboden 6 unterteilt. In dem Kühlraum 4 befindet sich ein Eisbereiter 7.FIG. 1 shows a refrigerator 1 with an open door 2 and an interior 3. The interior 3 is divided into a refrigerator 4 and a freezer 5. For reasons of clarity, no closure flap is shown on the freezer compartment 5. The refrigerator 4 is usually adjustable by at least one height Shelf 6 divided. In the refrigerator 4 is an icemaker. 7
Der Eisbereiter 7 gliedert sich in ein Technikmodul 8, eine Eisschale 9 und einen als Wassertank ausgebildeten Frischwasserbehälter 10. In einer weiteren Ausführungsform kann sich der Frischwasserbehälter 10 auch außerhalb des gekühlten Innenraums 3 befinden.The ice maker 7 is divided into a technology module 8, an ice tray 9 and a water tank designed as a fresh water tank 10. In another embodiment, the fresh water tank 10 may also be located outside of the cooled interior 3.
Figur 2 zeigt schematisch den Eisbereiter mit Technikmodul 8 und Frischwasserbehälter 10. Der Frischwasserbehälter 10 ist mit Trinkwasser 1 1 gefüllt, das dem Frischwasserbehälter 10 über eine Frischwasserleitung 12 zugeführt wird. Ein Füllstandsschalter 13 und ein Frischwasserventil 14 sind mit einer Eisbereiter-Steuerung 19 verbunden. Wenn ein gewisser Pegelstand im Frischwasserbehälter 10 erreicht wird, wird das Frischwasserventil 14 aufgrund der der durch den Füllstandsschalter 13 übermittelten Informationen geschlossen.Figure 2 shows schematically the ice maker with technology module 8 and fresh water tank 10. The fresh water tank 10 is filled with drinking water 1 1, which is supplied to the fresh water tank 10 via a fresh water line 12. A level switch 13 and a fresh water valve 14 are connected to an ice maker control 19. When a certain level is reached in the fresh water tank 10, the fresh water valve 14 is closed due to the information provided by the level switch 13 information.
Der Frischwasserbehälter 10 kann bei Bedarf über eine Abwasserleitung 15 vollständig entleert werden. Hierzu wird das Abwasserventil 16 betätigt. Dieses Abwasserventil 16 ist ebenfalls mit der Eisbereiter-Steuerung 19 verbunden.The fresh water tank 10 can be completely emptied if necessary via a sewer line 15. For this purpose, the wastewater valve 16 is actuated. This waste water valve 16 is also connected to the ice maker control 19.
In dem mit Trinkwasser 1 1 gefüllten Frischwasserbehälter 10 befindet sich eine elektrische Heizung 17, die das Trinkwasser 1 1 auf eine vorgegebene Temperatur erwärmt. Die Temperatur ist abhängig vom Mineraliengehalt des Trinkwassers 1 1. Je höher der Mineraliengehalt im Trinkwasser 1 1 ist, desto mehr muss das Trinkwasser 1 1 erwärmt werden. Das Temperaturniveau bewegt sich bevorzugt zwischen 15°C und 300C. Eine Erhöhung der Temperatur des Trinkwassers 1 1 über 300C führt zu einem Ausfällen der Mineralien. Die Temperatur, die das Trinkwasser 1 1 aktuell besitzt, wird mittels eines Temperatursensors 18 erfasst und an die Eisbereiter-Steuerung 19 weitergeleitet, die dann die elektrische Heizung 17 entsprechend steuert.In the filled with drinking water 1 1 fresh water tank 10 is an electric heater 17, which heats the drinking water 1 1 to a predetermined temperature. The temperature depends on the mineral content of the drinking water 1 1. The higher the mineral content in drinking water 1 1, the more the drinking water 1 1 must be heated. The temperature level is preferably between 15 ° C and 30 0 C. An increase in the temperature of the drinking water 1 1 above 30 0 C leads to a precipitation of minerals. The temperature that currently has the drinking water 1 1 is detected by a temperature sensor 18 and forwarded to the ice maker control 19, which then controls the electric heater 17 accordingly.
Das temperierte Trinkwasser 1 1 wird mittels einer Pumpe 20 über die Verbindungsleitung 21 in die Eisbereiterschale 22 des Technikmoduls 8 gefördert. Auch die Pumpe 20 wird durch die Eisbereiter-Steuerung 19 angesteuert. In das Wasser in der Eisbereiterschale 22 tauchen Kältefinger 23 ein, die bevorzugt eine Temperatur von -2°C bis -6°C aufweisen, wobei diese Temperatur mit großer Genauigkeit an der Oberfläche der Kältefinger 23 eingehalten wird.The tempered drinking water 1 1 is by means of a pump 20 via the Connecting line 21 promoted in the ice maker tray 22 of the technology module 8. The pump 20 is driven by the ice maker control 19. In the water in the ice maker bowl 22 dip cold fingers 23, which preferably have a temperature of -2 ° C to -6 ° C, wherein this temperature is maintained with great accuracy at the surface of the cold finger 23.
Um mittels der Kältefinger 23 klare Eiswürfel 24 zu erzeugen, ist es notwendig, das Wasser im Bereich der Kältefinger 23 zu bewegen. Der Temperaturunterschied zwischen den Kältefingern 23 und dem temperierten Wasser, der bevorzugt zwischen 200C und 300C beträgt, erzeugt genügend Konvektion im Bereich der Kältefinger 23, um das Entstehen trüber Stellen in den Eiswürfeln 24 zuverlässig zu vermeiden. Eine inhomogene Temperaturverteilung über den Teil der Oberfläche des Eisfingers 23, der in das Wasser ragt, würde ebenfalls zu partiell trüben Stellen im Eiswürfel 24 führen. Daher ist die Temperatur überall an der Oberfläche des Kältefingers 23, die mit dem Wasser in Berührung steht, gleich.In order to produce clear ice cubes 24 by means of the cold fingers 23, it is necessary to move the water in the area of the cold fingers 23. The temperature difference between the cold fingers 23 and the tempered water, which is preferably between 20 0 C and 30 0 C, generates sufficient convection in the area of the cold finger 23 to reliably avoid the emergence of turbid spots in the ice cubes 24. An inhomogeneous temperature distribution over the part of the surface of the ice finger 23, which protrudes into the water, would also lead to partially cloudy spots in the ice cube 24. Therefore, the temperature is the same everywhere on the surface of the cold finger 23, which is in contact with the water.
Die klaren Eiswürfel 23 werden nach ihrer Bereitung in der Eisschale 9 abgelegt und stehen zur Entnahme bereit.The clear ice cubes 23 are deposited after their preparation in the ice tray 9 and are ready for removal.
Bezugszeichenliste:LIST OF REFERENCE NUMBERS
1 Kaltegerat1 cold appliance
2 Tür2 door
3 Innenraum3 interior
4 Kühlraum4 refrigerator
5 Gefrierfach5 freezer
6 Fachboden6 shelves
7 Eisbereiter7 ice makers
8 Technikmodul8 technology module
9 Eisschale Frischwasserbehälter9 ice cream bowl Fresh water tank
TrinkwasserDrinking water
FrischwasserleitungFresh water pipe
Füllstandsschalterlevel switch
FrischwasserventilFresh water valve
Abwasserleitungsewer
AbwasserventilExhaust valve
Elektrische HeizungElectric heating
Temperatursensortemperature sensor
Eisbereiter-SteuerungIce-control
Pumpepump
Verbindungsleitungconnecting line
EisbereiterschaleEisbereiterschale
Kältefingercold finger
Eiswürfel ice cubes

Claims

Patentansprüche claims
1. Kältegerät (1 ) mit einem Innenraum (3) zur Aufbewahrung von Kühl- und/oder Gefriergut und einem in dem Innenraum (3) angeordneten Klareisbereiter (7) mit gekühlten Kältefingern (23), die in eine mit Wasser gefüllte Schale (22) eintauchen, dadurch gekennzeichnet, dass das Wasser in der Schale (22) zumindest stellenweise eine Temperatur von mehr als 12°C aufweist.1. Refrigeration appliance (1) with an interior space (3) for storing refrigerated and / or frozen goods and a in the interior (3) arranged Klareisbereiter (7) with cooled cold fingers (23) in a filled with water shell (22 ), characterized in that the water in the shell (22) at least in places has a temperature of more than 12 ° C.
2. Kältegerät nach Anspruch 1 , dadurch gekennzeichnet, dass das Wasser durch eine Heizeinrichtung (17) aufgeheizt wird.2. Refrigerating appliance according to claim 1, characterized in that the water is heated by a heating device (17).
3. Kältegerät nach Anspruch 2, dadurch gekennzeichnet, dass sich die Heizeinrichtung (17) in einem separaten Wassertank (10) befindet.3. Refrigerating appliance according to claim 2, characterized in that the heating device (17) is located in a separate water tank (10).
4. Kältegerät nach Anspruch 3, dadurch gekennzeichnet, dass in dem Wassertank (10) ein Temperatursensor (18) vorgesehen ist.4. Refrigerating appliance according to claim 3, characterized in that in the water tank (10), a temperature sensor (18) is provided.
5. Kältegerät nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Wassertemperatur zwischen 15°C und 300C beträgt.5. Refrigerating appliance according to one of claims 1 to 4, characterized in that the water temperature is between 15 ° C and 30 0 C.
6. Kältegerät nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Wassertemperatur von dem Mineraliengehalt des Wassers abhängig ist.6. Refrigerating appliance according to one of claims 1 to 5, characterized in that the water temperature is dependent on the mineral content of the water.
7. Kältegerät nach Anspruch 1 , dadurch gekennzeichnet, dass die Temperatur an den Kältefingern (23) nicht weniger als -6°C beträgt.7. Refrigerating appliance according to claim 1, characterized in that the temperature at the cold fingers (23) is not less than -6 ° C.
8. Kältegerät nach Anspruch 1 , dadurch gekennzeichnet, dass die Temperatur an den Kältefingern (23) nicht mehr als -2°C beträgt. 8. Refrigerating appliance according to claim 1, characterized in that the temperature at the cold fingers (23) is not more than -2 ° C.
EP07847448A 2006-12-22 2007-11-28 Refrigerating appliance comprising an ice-making machine Not-in-force EP2126488B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006061090A DE102006061090A1 (en) 2006-12-22 2006-12-22 Refrigeration unit with an icemaker
PCT/EP2007/062923 WO2008077710A2 (en) 2006-12-22 2007-11-28 Refrigerating appliance comprising an ice-making machine

Publications (2)

Publication Number Publication Date
EP2126488A2 true EP2126488A2 (en) 2009-12-02
EP2126488B1 EP2126488B1 (en) 2011-03-09

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EP07847448A Not-in-force EP2126488B1 (en) 2006-12-22 2007-11-28 Refrigerating appliance comprising an ice-making machine

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EP (1) EP2126488B1 (en)
AT (1) ATE501406T1 (en)
DE (2) DE102006061090A1 (en)
ES (1) ES2360377T3 (en)
RU (1) RU2447375C2 (en)
WO (1) WO2008077710A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010099454A2 (en) * 2009-02-28 2010-09-02 Electrolux Home Products, Inc. Method and apparatus for making clear ice
DE102010003828A1 (en) 2010-04-09 2011-10-13 BSH Bosch und Siemens Hausgeräte GmbH Method and device for producing pieces of ice and refrigeration device, in particular household refrigerating appliance with such a device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2291826A (en) * 1934-07-30 1942-08-04 Muffly Glenn Refrigerating mechanism
GB498412A (en) * 1937-07-08 1939-01-09 Reinhard Emil Wilhelm Wussow Improvements in and relating to processes and apparatus for the production of ice and for cooling liquids
US3146606A (en) * 1961-09-06 1964-09-01 Whirlpool Co Apparatus for making clear ice bodies
US5187948A (en) * 1991-12-31 1993-02-23 Whirlpool Corporation Clear cube ice maker
RU2161760C2 (en) * 1998-05-08 2001-01-10 Рубцов Евгений Юрьевич Ice generator
KR20040039090A (en) * 2002-10-31 2004-05-10 삼성광주전자 주식회사 Ice making machine
KR100507929B1 (en) * 2002-12-10 2005-08-17 삼성광주전자 주식회사 Ice making machine
DE10336834A1 (en) * 2003-08-11 2005-03-17 BSH Bosch und Siemens Hausgeräte GmbH A method for making ice cubes in a domestic refrigeration appliance has a water vessel having cooling fingers and a drainage vessel to collect and siphon away the residual water

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008077710A3 *

Also Published As

Publication number Publication date
DE102006061090A1 (en) 2008-06-26
WO2008077710A3 (en) 2008-09-18
ATE501406T1 (en) 2011-03-15
ES2360377T3 (en) 2011-06-03
WO2008077710A2 (en) 2008-07-03
RU2447375C2 (en) 2012-04-10
RU2009124107A (en) 2011-02-10
EP2126488B1 (en) 2011-03-09
DE502007006704D1 (en) 2011-04-21

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