EP2132496A1 - Cooling device having three temperature zones - Google Patents

Cooling device having three temperature zones

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Publication number
EP2132496A1
EP2132496A1 EP08718003A EP08718003A EP2132496A1 EP 2132496 A1 EP2132496 A1 EP 2132496A1 EP 08718003 A EP08718003 A EP 08718003A EP 08718003 A EP08718003 A EP 08718003A EP 2132496 A1 EP2132496 A1 EP 2132496A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
evaporator
storage
storage zones
refrigerant circuit
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
EP08718003A
Other languages
German (de)
French (fr)
Other versions
EP2132496B1 (en
Inventor
Wolfgang Becker
Adolf Feinauer
Helmut Konopa
Peter Nalbach
Wolfgang Nuiding
Berthold Pflomm
Simon Schechinger
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
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Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2132496A1 publication Critical patent/EP2132496A1/en
Application granted granted Critical
Publication of EP2132496B1 publication Critical patent/EP2132496B1/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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution valves

Definitions

  • the present invention relates to a refrigeration device having three storage zones which are insulated from one another and cooled by a refrigerant flowing through the evaporator.
  • the evaporators of the three storage zones in a refrigerant circuit are connected in series.
  • the cooling capacity of the evaporator located furthest downstream in the refrigerant circuit is controlled by the amount of refrigerant circulating in the refrigerant circuit.
  • a refrigerant collector is arranged in a high-pressure region of the refrigerant circuit.
  • the refrigerant circuit When storing liquid refrigerant, the refrigerant circuit operates in an underfilled state, causing the refrigerant to substantially evaporate before reaching the most downstream evaporator.
  • the cooling capacity is thus concentrated on the storage zones cooled by the further upstream evaporators. Since in the two upstream storage zones independent control of the cooling capacity is not possible, the cooling capacity of these evaporators and the refrigerant demand of these storage zones must be exactly matched to prevent hypothermia in one or the other storage zone.
  • Evaporator is provided a second injection point, which allows the way of the
  • a refrigerator with three storage zones is known, each associated with arranged in parallel refrigerant circuits evaporator.
  • the aim of the present invention is to provide a refrigeration device with three storage zones, in which the cooling capacity can be flexibly distributed by simple means to the various storage zones.
  • the object is achieved in that in a refrigerator with three insulated from each other and cooled by refrigerant evaporator storage zones, wherein a first refrigerant circuit passes through a first and a second of the three storage zones, a second refrigerant circuit parallel to the first refrigerant circuit through the first and the third of the storage zones runs.
  • the available cooling capacity is distributed to the first and second storage zones in a first ratio (which ratio may be variable by varying the circulating refrigerant amount, controlling the refrigerant pressures, or the like), and if so Refrigerant circulates through the second refrigerant circuit, the cooling power is distributed in a second ratio to the first and the third storage zone.
  • the first storage zone in both refrigerant circuits is the upstream storage zone.
  • the first storage zone is the coldest among the three storage zones.
  • each refrigerant circuit should extend over substantially the entire extent of the evaporator plate of this first storage zone, so that there are no areas on this evaporator plate, which are cooled substantially only by one of the two refrigerant circuits.
  • shut-off valve upstream of the storage zones in each refrigerant circuit.
  • the shut-off valve is preferably a solenoid valve.
  • An evaporator for a refrigerator of the type described above is characterized in that it is on a common board two separate, d. H. having non-communicating refrigerant pipes.
  • an injection point is formed in each of these refrigerant pipes.
  • Fig. 1 shows a schematic representation of a refrigeration device according to the invention.
  • Fig. 1 is a schematic front view of a refrigerator with three storage zones, a freezer 1, a fresh cooling compartment 2 and a normal cooling compartment 3.
  • the freezer compartment 1 and the normal refrigeration compartment 3 are each shown in the open position shown pivotable doors 4, 5 assigned.
  • the normal refrigerated compartment 3 is normally closed by a front panel of a pull-out drawer.
  • the drawer is not shown in the figure so as to be able to show the rear walls of all three compartments 1, 2, 3. On these rear walls is - foam side and therefore not visible per se - each one evaporator 6, 7, 8 for cooling the corresponding compartment 1, 2 and 3 respectively.
  • the evaporators 6, 7, 8 are each shown as dashed outlines.
  • the refrigerant lines may also be formed by pipes attached to the board.
  • refrigerant lines 9, 10 run in meanders side by side from an injection point 1 1 or 12 to an outlet 13 and 14. Both refrigerant lines 9, 10 extend substantially over the entire height and width of the board, so that the entire surface thereof is efficiently cooled by both the refrigerant pipe 9 and the refrigerant pipe 10.
  • the evaporator 7, 8 are connected via a common suction line 15 with a compressor 16, the compressor 16 feeds the two refrigerant lines 9, 10 of the freezer evaporator 6 via a condenser 17, a pressure line 18, a solenoid valve 19 and capillaries 20, 21, which open at the injection points 1 1, 12 in the refrigerant lines 9 and 10 respectively.
  • both refrigerant lines 9, 10 of the freezer evaporator 1 and connected in series with them evaporators 7 and 8 are supplied simultaneously with refrigerant.
  • the refrigerant flow through the freezer evaporator 6 is therefore higher than in the two previously mentioned positions of the solenoid valve 19, but this does not lead to much greater cooling of the freezer compartment evaporator 6. Therefore, in this position in each of the two parallel refrigerant circuits, the distribution of the cooling capacity in favor of the respective downstream compartment 2 or 3 postponed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A cooling device is provided having three storage zones that are insulated from each other and cooled via evaporators through which a coolant flows. A first coolant circuit extends through a first and a second of the three storage zones and a second coolant circuit positioned parallel to the first coolant circuit extends through the first and the third of the storage zones.

Description

Kältegerät mit drei Temperaturzonen Refrigerating appliance with three temperature zones
Die vorliegende Erfindung betrifft ein Kältegerät mit drei voneinander isolierten und durch von Kältemittel durchströmte Verdampfer gekühlten Lagerzonen.The present invention relates to a refrigeration device having three storage zones which are insulated from one another and cooled by a refrigerant flowing through the evaporator.
Bei einem herkömmlichen Typ derartiger Kältegeräte sind die Verdampfer der drei Lagerzonen in einem Kältemittelkreis hintereinandergeschaltet. Die Kühlleistung des am weitesten stromabwärts im Kältemittelkreis liegenden Verdampfers wird über die in dem Kältemittelkreis zirkulierende Kältemittelmenge geregelt. Hierfür ist ein Kältemittelsammler in einem Hochdruckbereich des Kältemittelkreises angeordnet. Wenn dieser flüssiges Kältemittel speichert, arbeitet der Kältemittelkreis in einem unterfüllten Zustand, was dazu führt, dass das Kältemittel im Wesentlichen bereits verdampft ist, bevor es den am weitesten stromabwärts liegenden Verdampfer erreicht. Die Kühlleistung konzentriert sich somit auf die von den weiter stromaufwärts liegenden Verdampfern gekühlten Lagerzonen. Da in den beiden stromaufwärtigen Lagerzonen eine voneinander unabhängige Regelung der Kühlleistung nicht möglich ist, müssen die Kühlleistung dieser Verdampfer und der Kältemittelbedarf dieser Lagerzonen exakt aufeinander abgestimmt sein, um eine Unterkühlung in der einen oder anderen Lagerzone zu verhindern.In a conventional type of such refrigerators, the evaporators of the three storage zones in a refrigerant circuit are connected in series. The cooling capacity of the evaporator located furthest downstream in the refrigerant circuit is controlled by the amount of refrigerant circulating in the refrigerant circuit. For this purpose, a refrigerant collector is arranged in a high-pressure region of the refrigerant circuit. When storing liquid refrigerant, the refrigerant circuit operates in an underfilled state, causing the refrigerant to substantially evaporate before reaching the most downstream evaporator. The cooling capacity is thus concentrated on the storage zones cooled by the further upstream evaporators. Since in the two upstream storage zones independent control of the cooling capacity is not possible, the cooling capacity of these evaporators and the refrigerant demand of these storage zones must be exactly matched to prevent hypothermia in one or the other storage zone.
In DE 197 56 861 A1 wird versucht, diesen Nachteil zu beheben, indem bei einem Kältemittelgerät mit drei Lagerzonen, die durch in einem Kältemittelkreis in Reihe geschaltete Verdampfer gekühlt sind, an dem am weitesten stromaufwärts gelegenenIn DE 197 56 861 A1 it is attempted to remedy this disadvantage by using a refrigerant device with three storage zones, which are cooled by evaporators connected in series in a refrigerant circuit, at the furthest upstream
Verdampfer eine zweite Einspritzstelle vorgesehen wird, die es ermöglicht, den Weg desEvaporator is provided a second injection point, which allows the way of the
Kältemittels durch diesen Verdampfer zu verkürzen. Eine voneinander unabhängigeRefrigerant through this evaporator to shorten. An independent one
Kühlung der zwei in dem Kältemittelkreis nachgeordneten Lagerzonen ist jedoch auch mit dieser Anordnung schwierig.However, cooling the two storage zones downstream in the refrigerant circuit is difficult even with this arrangement.
Aus DE-OS 1 941 495 ist ein Kältegerät mit drei Lagerzonen bekannt, denen jeweils in parallelen Kältemittelkreisen angeordnete Verdampfer zugeordnet sind. Ein solcher Aufbau ermöglicht zwar eine willkürliche Verteilung der Kühlleistung auf die verschiedenen Lagerzonen, doch führen die hierfür benötigten Wegeventile zu hohen Kosten. Ziel der vorliegenden Erfindung ist, ein Kältegerät mit drei Lagerzonen anzugeben, bei dem die Kühlleistung mit einfachen Mitteln flexibel auf die verschiedenen Lagerzonen verteilt werden kann.From DE-OS 1 941 495 a refrigerator with three storage zones is known, each associated with arranged in parallel refrigerant circuits evaporator. Although such a structure allows an arbitrary distribution of the cooling capacity on the various storage zones, but lead the way valves required for this at a high cost. The aim of the present invention is to provide a refrigeration device with three storage zones, in which the cooling capacity can be flexibly distributed by simple means to the various storage zones.
Die Aufgabe wird dadurch gelöst, dass bei einem Kältegerät mit drei voneinander isolierten und durch von Kältemittel durchströmte Verdampfer gekühlten Lagerzonen, wobei ein erster Kältemittelkreis durch eine erste und eine zweite der drei Lagerzonen verläuft, ein zu dem ersten Kältemittelkreis paralleler zweiter Kältemittelkreis durch die erste und die dritte der Lagerzonen verläuft.The object is achieved in that in a refrigerator with three insulated from each other and cooled by refrigerant evaporator storage zones, wherein a first refrigerant circuit passes through a first and a second of the three storage zones, a second refrigerant circuit parallel to the first refrigerant circuit through the first and the third of the storage zones runs.
Wenn jeweils Kältemittel durch den ersten Kältemittelkreis zirkuliert, verteilt sich die verfügbare Kühlleistung auf die erste und die zweite Lagerzone in einem ersten Verhältnis (wobei dieses Verhältnis durch Variieren der zirkulierenden Kältemittelmenge, Steuern der auftretenden Kältemitteldrücke oder dergl. variierbar sein kann), und wenn das Kältemittel durch den zweiten Kältemittelkreis zirkuliert, verteilt sich die Kühlleistung in einem zweiten Verhältnis auf die erste und die dritte Lagerzone. Wenn jedoch beide Kältemittelkreise gleichzeitig versorgt sind, verteilt sich die aus der ersten Lagerzone abzuführende Wärme auf beide Kältemittelkreise - mit anderen Worten: das Kältemittel des ersten Kreises ist durch das des zweiten Kreises gekühlt und umgekehrt -, so dass sich in jedem der beiden Kältemittelkreise die Verteilung der Kühlleistung deutlich zu Gunsten der zweiten bzw. der dritten Lagerzone verschiebt.When each refrigerant circulates through the first refrigerant circuit, the available cooling capacity is distributed to the first and second storage zones in a first ratio (which ratio may be variable by varying the circulating refrigerant amount, controlling the refrigerant pressures, or the like), and if so Refrigerant circulates through the second refrigerant circuit, the cooling power is distributed in a second ratio to the first and the third storage zone. However, if both refrigerant circuits are supplied simultaneously, the dissipated heat from the first storage zone distributed to both refrigerant circuits - in other words, the refrigerant of the first circuit is cooled by that of the second circuit and vice versa -, so that in each of the two refrigerant circuits Distribution of cooling power significantly shifts in favor of the second and the third storage zone.
Vorzugsweise ist die erste Lagerzone in beiden Kältemittelkreisen die stromaufwärtige Lagerzone.Preferably, the first storage zone in both refrigerant circuits is the upstream storage zone.
Die bei gleichzeitigem Betrieb beider Kältemittelkreise beobachtete Verschiebung der Kühlleistungsverteilung ist um so stärker, je geringer die Temperaturdifferenz zwischen der ersten Lagerzone und dem darin zirkulierenden Kältemittel ist. Daher ist vorzugsweise die erste Lagerzone die kälteste unter den drei Lagerzonen.The shift in the cooling capacity distribution observed with simultaneous operation of both refrigerant circuits is the stronger the smaller the temperature difference between the first storage zone and the refrigerant circulating therein. Therefore, preferably, the first storage zone is the coldest among the three storage zones.
Weiterhin ist es für die Umverteilung der Kühlleistung vorteilhaft, wenn die Kältemittelkreise in der ersten Lagerzone über eine gleiche Verdampferplatine geführt sind. Außerdem sollte sich vorzugsweise jeder Kältemittelkreis über im Wesentlichen die gesamte Ausdehnung der Verdampferplatine dieser ersten Lagerzone erstrecken, so dass es auf dieser Verdampferplatine keine Bereiche gibt, die im Wesentlichen nur von einem der beiden Kältemittelkreise gekühlt sind.Furthermore, it is advantageous for the redistribution of the cooling capacity when the refrigerant circuits are guided in the first storage zone via a same evaporator plate. In addition, preferably, each refrigerant circuit should extend over substantially the entire extent of the evaporator plate of this first storage zone, so that there are no areas on this evaporator plate, which are cooled substantially only by one of the two refrigerant circuits.
Um die Kältemittelverteilung zu steuern, ist zweckmäßigerweise in jedem Kältemittelkreis ein Absperrventil stromaufwärts von den Lagerzonen angeordnet.In order to control the refrigerant distribution, it is expedient to arrange a shut-off valve upstream of the storage zones in each refrigerant circuit.
Bei dem Absperrventil handelt es sich vorzugsweise um ein Magnetventil.The shut-off valve is preferably a solenoid valve.
Ein Verdampfer für ein Kältegerät der oben beschriebenen Art ist dadurch gekennzeichnet, dass er auf einer gemeinsamen Platine zwei getrennte, d. h. nicht miteinander kommunizierende Kältemittelleitungen aufweist.An evaporator for a refrigerator of the type described above is characterized in that it is on a common board two separate, d. H. having non-communicating refrigerant pipes.
Zweckmäßigerweise ist in jeder dieser Kältemittelleitungen eine Einspritzstelle gebildet.Conveniently, an injection point is formed in each of these refrigerant pipes.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die beigefügte Figur.Further features and advantages of the invention will become apparent from the following description of embodiments with reference to the accompanying figure.
Fig. 1 zeigt eine schematische Darstellung eines erfindungsgemäßen Kältegerätes.Fig. 1 shows a schematic representation of a refrigeration device according to the invention.
Fig. 1 ist eine schematische Frontalansicht eines Kältegerätes mit drei Lagerzonen, einem Gefrierfach 1 , einem Frischkühlfach 2 und einem Normalkühlfach 3. Dem Gefrierfach 1 und dem Normalkühlfach 3 sind jeweils in offener Stellung gezeigte schwenkbare Türen 4, 5 zugeordnet. Das Normalkühlfach 3 ist normalerweise durch eine Frontplatte einer herausziehbaren Schublade verschlossen. Die Schublade ist in der Figur nicht dargestellt, um die Rückwände aller drei Fächer 1 , 2, 3 zeigen zu können. An diesen Rückwänden ist - schaumseitig und daher an sich nicht sichtbar - jeweils ein Verdampfer 6, 7, 8 zum Kühlen des entsprechenden Faches 1 , 2 bzw. 3 angeordnet. Die Verdampfer 6, 7, 8 sind jeweils als gestrichelte Umrisse dargestellt. Sie sind in an sich bekannter Weise aufgebaut aus einer sich an die Rückwand des entsprechenden Faches anschmiegenden ebenen Platine aus Metall, zum Beispiel aus Aluminiumblech, und einer mit dieser Platine flächig verbundenen zweiten Metallplatte, in der Kältemittelleitungen bildende Rillen eingetieft sind; alternativ können die Kältemittelleitungen auch durch an der Platine befestigte Rohrleitungen gebildet sein.Fig. 1 is a schematic front view of a refrigerator with three storage zones, a freezer 1, a fresh cooling compartment 2 and a normal cooling compartment 3. The freezer compartment 1 and the normal refrigeration compartment 3 are each shown in the open position shown pivotable doors 4, 5 assigned. The normal refrigerated compartment 3 is normally closed by a front panel of a pull-out drawer. The drawer is not shown in the figure so as to be able to show the rear walls of all three compartments 1, 2, 3. On these rear walls is - foam side and therefore not visible per se - each one evaporator 6, 7, 8 for cooling the corresponding compartment 1, 2 and 3 respectively. The evaporators 6, 7, 8 are each shown as dashed outlines. They are constructed in a manner known per se from a flush to the rear wall of the corresponding compartment planar metal board, for example made of aluminum sheet, and a surface connected to this board second metal plate, deepened in the refrigerant lines forming grooves are; Alternatively, the refrigerant lines may also be formed by pipes attached to the board.
Auf der Platine des Gefrierfachverdampfers 6 verlaufen zwei Kältemittelleitungen 9, 10 in Mäandern nebeneinander her von einer Einspritzstelle 1 1 bzw. 12 zu einem Auslass 13 bzw. 14. Beide Kältemittelleitungen 9, 10 erstrecken sich im Wesentlichen über die gesamte Höhe und Breite der Platine, so dass deren gesamte Oberfläche sowohl durch die Kältemittelleitung 9 als auch die Kältemittelleitung 10 effizient kühlbar ist. An den Auslass 13 ist der Verdampfer 7 des Frischkühlfaches 2 angeschlossen; an den Auslass 14 der Verdampfer 8 des Normalkühlfaches 3. Die Verdampfer 7, 8 sind über eine gemeinsame Saugleitung 15 mit einem Verdichter 16 verbunden, der Verdichter 16 speist die zwei Kältemittelleitungen 9, 10 des Gefrierfachverdampfers 6 über einen Verflüssiger 17, eine Druckleitung 18, ein Magnetventil 19 und Kapillaren 20, 21 , die an den Einspritzstellen 1 1 , 12 in die Kältemittelleitungen 9 bzw. 10 münden.On the board of the freezer evaporator 6 two refrigerant lines 9, 10 run in meanders side by side from an injection point 1 1 or 12 to an outlet 13 and 14. Both refrigerant lines 9, 10 extend substantially over the entire height and width of the board, so that the entire surface thereof is efficiently cooled by both the refrigerant pipe 9 and the refrigerant pipe 10. At the outlet 13 of the evaporator 7 of the fresh refrigerating compartment 2 is connected; the evaporator 7, 8 are connected via a common suction line 15 with a compressor 16, the compressor 16 feeds the two refrigerant lines 9, 10 of the freezer evaporator 6 via a condenser 17, a pressure line 18, a solenoid valve 19 and capillaries 20, 21, which open at the injection points 1 1, 12 in the refrigerant lines 9 and 10 respectively.
In einer ersten Stellung des Magnetventils 19 verbindet dieses die Druckleitung 18 mit der Kältemittelleitung 9 des Gefrierfachverdampfers 6 und dem hiermit in Reihe verbundenen Verdampfer 7 des Frischkühlfaches 2, während die Leitung 10 abgesperrt ist. In diesem Zustand verteilt sich die Kühlleistung des zirkulierenden Kältemittels auf das Gefrierfach 1 und das Frischkühlfach 2 in einem ersten durch die Konstruktion des Kältegerätes vorgegebenen Verhältnis.In a first position of the solenoid valve 19, this connects the pressure line 18 with the refrigerant line 9 of the freezer compartment evaporator 6 and the hereby connected in series evaporator 7 of the fresh refrigerating compartment 2, while the line 10 is shut off. In this state, the cooling capacity of the circulating refrigerant distributed to the freezer compartment 1 and the fresh refrigerator compartment 2 in a first predetermined by the construction of the refrigerator ratio.
In einer zweiten Stellung des Magnetventils 19 ist die Leitung 9 abgesperrt, während die Leitung 10 und der damit in Reihe verbundene Verdampfer 8 des Normalkühlfaches 3 versorgt werden. So verteilt sich die Kühlleistung des Kältemittels in einem zweiten Verhältnis auf das Gefrierfach 1 und das Normalkühlfach 3.In a second position of the solenoid valve 19, the line 9 is shut off, while the line 10 and thus connected in series evaporator 8 of the normal cooling compartment 3 are supplied. Thus, the cooling capacity of the refrigerant distributed in a second ratio to the freezer compartment 1 and the normal refrigeration compartment. 3
In einer dritten Stellung des Magnetventils 19 werden beide Kältemittelleitungen 9, 10 des Gefrierfachverdampfers 1 und die mit ihnen in Reihe verbundenen Verdampfer 7 bzw. 8 gleichzeitig mit Kältemittel versorgt. Der Kältemittelfluss durch den Gefrierfachverdampfer 6 ist daher höher als in den beiden zuvor erwähnten Stellungen des Magnetventils 19, doch führt dies nicht zu einer wesentlich stärkeren Abkühlung des Gefrierfachverdampfers 6. Daher ist in dieser Stellung in jedem der zwei parallelen Kältemittelkreise die Verteilung der Kühlleistung zu Gunsten des jeweils stromabwärts liegenden Faches 2 oder 3 verschoben. So ist es möglich, die Abmessungen der Verdampfer 6, 7, 8 und die die Fächer 1 , 2, 3 umgebenden Isolationsmaterialstärken jeweils so zu dimensionieren, dass bei ausschließlich ungleichzeitigem Betrieb der parallelen Kältemittelkreise, das heißt bei Betrieb nur in den ersten zwei Stellungen des Magnetventils 19, eine etwas zu starke Kühlung des Gefrierfaches 1 resultiert, wenn die anderen beiden Fächer 2, 3 jeweils auf eine Solltemperatur geregelt werden. Diese übermäßige Kühlung des Gefrierfaches 1 kann jedoch verhindert werden, indem in der dritten Stellung des Magnetventils 19 die zwei parallelen Kältemittelkreise gleichzeitig versorgt werden. So können effektiv die Temperaturen in den drei Fächern unabhängig voneinander geregelt werden, ohne dass es hierfür erforderlich wäre, die Menge an zirkulierendem Kältemittel zeitweilig zu reduzieren und so einen ineffizienten unterfüllten Zustand des Kältemittelkreislaufes herbeizuführen. In a third position of the solenoid valve 19, both refrigerant lines 9, 10 of the freezer evaporator 1 and connected in series with them evaporators 7 and 8 are supplied simultaneously with refrigerant. The refrigerant flow through the freezer evaporator 6 is therefore higher than in the two previously mentioned positions of the solenoid valve 19, but this does not lead to much greater cooling of the freezer compartment evaporator 6. Therefore, in this position in each of the two parallel refrigerant circuits, the distribution of the cooling capacity in favor of the respective downstream compartment 2 or 3 postponed. It is thus possible to dimension the dimensions of the evaporators 6, 7, 8 and the insulating material thicknesses surrounding the compartments 1, 2, 3 in such a way that in the case of exclusively unequal operation of the parallel refrigerant circuits, that is, in operation only in the first two positions of the Solenoid valve 19, a little too much cooling of the freezer compartment 1 results when the other two compartments 2, 3 are each controlled to a desired temperature. However, this excessive cooling of the freezer compartment 1 can be prevented by the two parallel refrigerant circuits are supplied simultaneously in the third position of the solenoid valve 19. Thus, effectively, the temperatures in the three compartments can be regulated independently of each other, without the need to temporarily reduce the amount of circulating refrigerant, thus bringing about an inefficient, underfilled condition of the refrigerant circuit.

Claims

Patentansprüche claims
1. Kältegerät mit drei voneinander isolierten und durch von Kältemittel durchströmte1. Refrigeration device with three insulated from each other and flowed through by refrigerant
Verdampfer gekühlten Lagerzonen (1 , 2 3), wobei ein erster Kältemittelkreis (9, 7) durch eine erste (1 ) und eine zweite (2) der drei Lagerzonen verläuft, dadurch gekennzeichnet, dass ein zu dem ersten Kältemittelkreis (9, 7) paralleler zweiter Kältemittelkreis (10, 8) durch die erste und die dritte der Lagerzonen (1 , 3) verläuft.Evaporator cooled storage zones (1, 2 3), wherein a first refrigerant circuit (9, 7) through a first (1) and a second (2) of the three storage zones, characterized in that a to the first refrigerant circuit (9, 7) parallel second refrigerant circuit (10, 8) through the first and the third of the storage zones (1, 3) extends.
2. Kältegerät nach Anspruch 1 , dadurch gekennzeichnet, dass die erste Lagerzone2. Refrigerating appliance according to claim 1, characterized in that the first storage zone
(1 ) in beiden Kältemittelkreisen die stromaufwärtige Lagerzone ist.(1) is the upstream storage zone in both refrigerant circuits.
3. Kältegerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die erste Lagerzone (1 ) die kälteste unter den Lagerzonen (1 , 2, 3) ist.3. Refrigerating appliance according to claim 1 or 2, characterized in that the first storage zone (1) is the coldest among the storage zones (1, 2, 3).
4. Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kältemittelkreise (9, 10) in der ersten Lagerzone (1 ) über eine gleiche Verdampferplatine geführt sind.4. Refrigerating appliance according to one of the preceding claims, characterized in that the refrigerant circuits (9, 10) in the first storage zone (1) are guided over a same evaporator plate.
5. Kältegerät nach Anspruch 3, dadurch gekennzeichnet, dass jeder Kältemittelkreis sich über im Wesentlichen die gesamte Ausdehnung der Verdampferplatine des Verdampfers (6) der ersten Lagerzone (1 ) erstreckt.5. Refrigerating appliance according to claim 3, characterized in that each refrigerant circuit extends over substantially the entire extent of the evaporator plate of the evaporator (6) of the first storage zone (1).
6. Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeich- net, dass in jedem Kältemittelkreis ein Absperrventil (19) stromaufwärts von den6. Refrigerating appliance according to one of the preceding claims, characterized marked, that in each refrigerant circuit, a shut-off valve (19) upstream of the
Lagerzonen (1 , 2, 3) angeordnet ist.Storage zones (1, 2, 3) is arranged.
7. Kältegerät nach Anspruch 6, dadurch gekennzeichnet, dass das Absperrventil (19) ein Magnetventil ist. 7. Refrigerating appliance according to claim 6, characterized in that the shut-off valve (19) is a solenoid valve.
8. Verdampfer für ein Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass er zwei miteinander unverbundene Kältemittelleitungen (9, 10) auf einer gemeinsamen Platine aufweist.8. evaporator for a refrigerator according to one of the preceding claims, characterized in that it comprises two unconnected refrigerant pipes (9, 10) on a common board.
9. Verdampfer nach Anspruch 8, dadurch gekennzeichnet, dass in jeder der Kältemittelleitungen (9, 10) eine Einspritzstelle (11 , 12) gebildet ist. 9. evaporator according to claim 8, characterized in that in each of the refrigerant lines (9, 10) an injection point (11, 12) is formed.
EP08718003A 2007-04-10 2008-03-19 Cooling device having three temperature zones Active EP2132496B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007016849A DE102007016849A1 (en) 2007-04-10 2007-04-10 Refrigerating appliance with three temperature zones
PCT/EP2008/053277 WO2008122493A1 (en) 2007-04-10 2008-03-19 Cooling device having three temperature zones

Publications (2)

Publication Number Publication Date
EP2132496A1 true EP2132496A1 (en) 2009-12-16
EP2132496B1 EP2132496B1 (en) 2012-01-25

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EP08718003A Active EP2132496B1 (en) 2007-04-10 2008-03-19 Cooling device having three temperature zones
EP08736031A Withdrawn EP2132499A1 (en) 2007-04-10 2008-04-09 Refrigeration device comprising coolant conduits that are connected in parallel in the heat exchanger

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08736031A Withdrawn EP2132499A1 (en) 2007-04-10 2008-04-09 Refrigeration device comprising coolant conduits that are connected in parallel in the heat exchanger

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US (1) US8245526B2 (en)
EP (2) EP2132496B1 (en)
CN (2) CN101652609B (en)
AT (1) ATE543057T1 (en)
DE (1) DE102007016849A1 (en)
ES (1) ES2378348T3 (en)
RU (2) RU2468308C2 (en)
WO (2) WO2008122493A1 (en)

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Also Published As

Publication number Publication date
ATE543057T1 (en) 2012-02-15
RU2009137098A (en) 2011-05-20
EP2132496B1 (en) 2012-01-25
EP2132499A1 (en) 2009-12-16
CN101652610A (en) 2010-02-17
RU2468308C2 (en) 2012-11-27
US8245526B2 (en) 2012-08-21
WO2008122656A1 (en) 2008-10-16
RU2009137481A (en) 2011-05-20
CN101652609B (en) 2012-09-05
ES2378348T3 (en) 2012-04-11
WO2008122493A1 (en) 2008-10-16
CN101652609A (en) 2010-02-17
DE102007016849A1 (en) 2008-10-16
US20100043476A1 (en) 2010-02-25

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