EP0789206A2 - Refrigeration apparatus - Google Patents

Refrigeration apparatus Download PDF

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Publication number
EP0789206A2
EP0789206A2 EP96112097A EP96112097A EP0789206A2 EP 0789206 A2 EP0789206 A2 EP 0789206A2 EP 96112097 A EP96112097 A EP 96112097A EP 96112097 A EP96112097 A EP 96112097A EP 0789206 A2 EP0789206 A2 EP 0789206A2
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EP
European Patent Office
Prior art keywords
freezer
evaporator
freezer compartment
connecting line
refrigerant
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
EP96112097A
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German (de)
French (fr)
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EP0789206A3 (en
EP0789206B1 (en
Inventor
Roland Dipl.-Ing. Maier (Fh)
Walter Dipl.-Ing. Holz
Hans Christian Mack
Wolfgang Dipl.-Ing. Becker
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BSH Hausgeraete GmbH
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Individual
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Priority to SI9630656T priority Critical patent/SI0789206T1/en
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Publication of EP0789206A3 publication Critical patent/EP0789206A3/en
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Publication of EP0789206B1 publication Critical patent/EP0789206B1/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
    • F25B5/04—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
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/04—Refrigerators with a horizontal mullion
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/30—Quick freezing

Definitions

  • the invention relates to a refrigerator with at least two thermally separated freezer compartments arranged within its housing, each of which is cooled by an evaporator, which are fluidically connected to one another via a connecting line and which can be acted upon with refrigerant via a control device.
  • the invention has for its object to design a freezer according to the preamble of claim 1 such that the freezing speed for frozen goods is increased significantly in a simple manner.
  • the freezer compartments are equipped with different useful contents, the evaporator serving to cool the freezer compartment with the larger useful contents being able to be coupled out of the refrigerant flow by a shut-off device arranged in the connecting line and serving as a reservoir for liquid refrigerant.
  • the solution according to the invention makes it possible in a simple manner to operate the evaporator used to cool the freezer compartment with the lower useful content with the compressor designed for both evaporators, as a result of which the compressor, which is oversized for this evaporator, increases the evaporating pressure and thus the evaporating temperature the evaporator used to cool the freezer compartment with the lower useful content drops significantly. This significantly increases the cooling capacity of this evaporator, which means that freshly inserted frozen food can freeze through much more quickly. Furthermore, for the freezer compartment with the lower useful content, the same heat insulation of this compartment results in less heat, which also lowers the evaporation temperature and thus increases the cooling capacity of the evaporator.
  • the cooling capacity for the entire freezer is designed so that the most economical energy consumption is achieved for the entire device.
  • the compressor is selected so that it works with a favorable efficiency under the conditions specified by standard regulations.
  • the amount of refrigerant is also matched to optimal energy consumption.
  • the two freezer compartments of the freezer can be operated side by side at the same time.
  • the refrigerant can prevent the compressor from sucking in liquid refrigerant and thus taking damage.
  • a shut-off device is particularly expedient and can be activated in a time-optimized manner if, according to an advantageous embodiment of the object of the invention, it is provided that an electrically controllable shut-off valve serves as the shut-off device.
  • the shut-off valve in the connecting line is essentially at the same time as the control means when the evaporator in the freezer compartment has a lower useful content, it switches from its pass mode to its blocking mode.
  • the connecting line is connected to the evaporator serving to cool the freezer compartment with a lower useful content at least 50% of its refrigeration-effective evaporator surface.
  • the coupling of the connecting line to the evaporator serving to cool the freezer compartment has a smaller useful content is arranged on the inlet-side section of its evaporator surface.
  • the evaporator system can be constructed particularly inexpensively in terms of production technology if, according to a next advantageous embodiment of the subject of the invention, it is provided that the evaporator serving to cool the freezer compartments is preceded in the flow direction of the refrigerant driven by the compressor, with a throttle device serving to reduce the pressure thereof, which is essentially a have identical flow volume per unit of time.
  • the evaporator serving to cool the freezer compartment has a particularly high cooling capacity if, according to a further advantageous embodiment of the subject of the invention, it is provided that the coupling of the connecting line to the evaporator serving to cool the freezer compartment has a greater useful capacity on the outlet side Section of an evaporator surface is arranged.
  • both freezer compartments of the freezer can be operated in a particularly simple manner with little effort from the control of the refrigerant if, according to a further preferred embodiment of the subject matter of the invention, it is provided that the evaporator serving to cool the freezer compartment has a larger useful content when activated by the Control means upstream of the other evaporator and connected to it in terms of flow technology via the connecting line.
  • the evaporators for cooling the freezer compartments are designed as wire tube evaporators with evaporator shelves arranged at different heights.
  • the evaporators used to cool the freezer compartments can be formed in a particularly space-saving manner if, according to an alternative embodiment of the object of the invention, it is provided that the evaporators for cooling the freezer compartments are designed as evaporator boards.
  • the freezer compartment with the lower useful content is arranged in the housing of the freezer above the freezer compartment with the larger useful content.
  • a solution according to these features has the advantage that, in addition to facilitating loading of the freezer compartment which serves to freeze the frozen goods more quickly, a significantly more favorable access option is provided for checking the freezer condition of the frozen goods.
  • FIG. 1 shows a purely schematically illustrated household freezer 10, in the heat-insulating housing 11 of which two freezer compartments 12 and 13 arranged one above the other are provided. These are thermally separated from one another by a heat-insulating intermediate floor 14 and have a useful content of different sizes, the freezer compartment 12 having the lower useful content being arranged on top.
  • the household freezer 10 is equipped with a refrigeration system 15, which has a refrigerant compressor 16 designed for simultaneous cooling of the two freezer compartments 12 and 13.
  • a condenser 17 is connected on the pressure side to the refrigerant compressor 16 and is connected on the output side to an electrically controllable 3/2-way solenoid valve 18 which serves as control means.
  • the solenoid valve 18, which is controlled by an electronic evaluation circuit depending on the temperature prevailing in the freezer compartment 13 and can be brought into two different working positions I and II, has at its two outputs a throttle tube 19 and 20 serving to reduce the pressure of the liquid refrigerant flowing from the condenser 17 which are spiral-shaped and which have an identical flow resistance for liquid refrigerant.
  • the throttle tube 19 is provided on the inlet side of an evaporator 21, which is designed as an evaporator board and is arranged in the freezer compartment 12, the refrigerant channel arrangement 22 of which is formed in turns on the evaporator board.
  • the evaporator 21 is connected on the outlet side to the suction side of the refrigerant compressor 16 and, on its inlet side facing the throttle tube 19, has a connection point 23 arranged close to its refrigerant injection point (not shown). This serves for the fluidic connection of the refrigerant channel arrangement 22 of the evaporator 21 to a connecting line 24, the flow cross section of which can be shut off by a shut-off device designed as an electrically controllable shut-off valve 25 is.
  • the evaporator 21 is connected in terms of flow technology via the connecting line 24 to an evaporator 26 which is arranged in the freezer compartment 13 and is also formed in the manner of a board.
  • a connection point 28 is provided at the outlet-side end of its refrigerant channel arrangement 27, while the inlet-side end of the refrigerant channel arrangement 27 is connected to the throttle tube 20.
  • FIGs 1 and 2 different operating states of the household freezer 10 and the refrigeration system 15 are shown by solid lines, the operating state shown in Fig. 1 showing the normal operation in which the solenoid valve 18 in its working position II and the shut-off valve 25 in its pass mode is operated so that the evaporator 26 in the freezer compartment 13 is connected in series to the evaporator 21 in the freezer compartment 12.
  • the refrigerant flow generated by the refrigerant compressor 16 is fed to the throttle tube 20 to lower its pressure to the evaporator-specific operating pressure of the evaporator 26, from where it flows over the injection point of the evaporator 26, not shown, in its refrigerant channel arrangement 27.
  • the refrigerant flow enters the connecting line 24 via the connection point 28 and becomes Via the connection point 23 of the refrigerant channel arrangement 22 of the evaporator 21, from where it is sucked in at the outlet side of the refrigerant channel arrangement 22 in the gaseous state from the suction side of the refrigerant compressor 16. Due to the working position II of the solenoid valve 18, both evaporators 21 and 26 are charged with liquid refrigerant, so that the freezer compartments 12 and 13 reach their intended operating temperature.
  • the liquid refrigerant is distributed approximately uniformly in the evaporator system, consisting of the evaporator 21 and the evaporator 26. If the solenoid valve 18 is now switched to its working position I by the manual actuation of an electrical switch (not shown) for the purpose of a quick freezing process in the freezer compartment 12, the shut-off valve 25 going into its blocking operation simultaneously with the switching process of the solenoid valve 18, that is in the evaporator 26 decoupled liquid refrigerant from the refrigerant circuit of the refrigerant compressor 16.
  • the refrigerant compressor 16 which is designed per se with regard to its delivery volume to supply both evaporators 21 and 26 with liquid refrigerant, is operated in a largely underfilled manner. This manifests itself in a sharp reduction in the evaporation pressure for the refrigerant and thus a substantial reduction in the evaporation temperature, which is additionally favorably influenced by the lower heat input due to the lower useful content of the freezer compartment 12.
  • the liquid refrigerant remaining in the refrigerant circuit is discharged from the refrigerant compressor 16 via the solenoid valve Working position I is supplied to the throttle tube 19, from where it is supplied to the refrigerant channel arrangement 22 of the evaporator 21 via the injection point (not shown) of the evaporator 21, which is only in the refrigeration circuit with the compressor 16, from where it is via the outlet side of the refrigerant channel arrangement 22 is fed to the suction side of the compressor 16.
  • the solenoid valve 18 is switched to its working position II by an electronic evaluation circuit (not shown) evaluating the temperature in the freezer compartment 13, as a result of which the evaporator 26 becomes Cooling of the freezer compartment 13 is coupled back into the refrigerant circuit.
  • the electronic evaluation circuit switches the two control means into their operating state which applies refrigerant to both the freezer compartments 12 and 13.
  • the evaporators 21 and 26 can also be designed as a wire tube evaporator with evaporator stages arranged at different heights.
  • a fan circulating the cooling air therein can additionally be provided in the freezer compartment 12, which results in more favorable heat transfer from the evaporator 21 to the frozen goods stored in the freezer compartment.

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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)

Abstract

Bei einem Gefriergerät (10) mit wenigstens zwei innerhalb seines wärmeisolierenden Gehäuses (11) angeordneten, thermisch voneinander getrennten Gefrierfächern (12,13), von denen jedes von einem Verdampfer (21,26) gekühlt ist, welche über eine Verbindungsleitung (24) strömungstechnisch miteinander verbunden und welche über ein Steuermittel (18) mit Kältemittel beaufschlagbar sind, sind die Gefrierfächer (12,13) mit unterschiedlichem Nutzinhalt ausgestattet, wobei der zur Kühlung des Gefrierfaches (13) mit dem größeren Nutzinhalt dienende Verdampfer (26) durch eine in der Verbindungsleitung (24) angeordnete Absperreinrichtung (25) aus dem Kältemittelfluß auskoppelbar ist und als Reservoir für flüssiges Kältemittel dient. <IMAGE>In a freezer (10) with at least two thermally separated freezer compartments (12, 13) arranged within its heat-insulating housing (11), each of which is cooled by an evaporator (21, 26), which is fluidically connected via a connecting line (24) Connected to each other and which can be acted upon with refrigerant via a control means (18), the freezer compartments (12, 13) are equipped with different useful contents, the evaporator (26) serving to cool the freezer compartment (13) with the larger useful content being replaced by a Connecting line (24) arranged shut-off device (25) can be decoupled from the refrigerant flow and serves as a reservoir for liquid refrigerant. <IMAGE>

Description

Die Erfindung betrifft ein Kältegerät mit wenigstens zwei innerhalb seines Gehäuses angeordneten, thermisch voneinander getrennten Gefrierfächern, von denen jedes von einem Verdampfer gekühlt ist, welchem über eine Verbindungsleitung strömungstechnisch miteinander verbunden sind und welche über eine Steuereinrichtung mit Kältemittel beaufschlagbar sind.The invention relates to a refrigerator with at least two thermally separated freezer compartments arranged within its housing, each of which is cooled by an evaporator, which are fluidically connected to one another via a connecting line and which can be acted upon with refrigerant via a control device.

Bei frischen Nahrungsmitteln, welche durch Eingefrieren über eine längere Zeitdauer konserviert werden sollen, ist man darauf bedacht, diese möglichst umgehend einem Gefrierprozeß zu unterziehen. Um zu vermeiden, daß das Gefriergut während des Eingefriervorgange$ aufgrund einer ungenügenden Gefriergeschwindigkeit Qualitätseinbußen, z.B. in Form einer geschmacklichen Beeinträchtigung erleidet, ist für ein möglichst rasches Gefrieren des Gefriergutes Sorge zu tragen.In the case of fresh foods which are to be preserved for a longer period of time by freezing, care should be taken to freeze them as soon as possible. In order to prevent the frozen goods from suffering quality losses, for example in the form of a taste impairment, during the freezing process $, the frozen goods must be frozen as quickly as possible.

Der Erfindung liegt die Aufgabe zugrunde, ein Gefriergerät gemäß dem Oberbegriff des Anspruches 1 derart auszubilden, daß die Gefriergeschwindigkeit für Gefriergut auf einfache Weise deutlich erhöht ist.The invention has for its object to design a freezer according to the preamble of claim 1 such that the freezing speed for frozen goods is increased significantly in a simple manner.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die Gefrierfächer mit unterschiedlichem Nutzinhalt ausgestattet sind, wobei der zur Kühlung des Gefrierfaches mit dem größeren Nutzinhalt dienende Verdampfer durch eine in der Verbindungsleitung angeordnete Absperreinrichtung aus dem Kältemittelfluß auskoppelbar ist und als Reservoir für flüssiges Kältemittel dient.This object is achieved according to the invention in that the freezer compartments are equipped with different useful contents, the evaporator serving to cool the freezer compartment with the larger useful contents being able to be coupled out of the refrigerant flow by a shut-off device arranged in the connecting line and serving as a reservoir for liquid refrigerant.

Durch die erfindungsgemäße Lösung ist auf einfache Weise die Möglichkeit geschaffen, den zur Kühlung des Gefrierfaches mit dem geringeren Nutzinhalt dienenden Verdampfer mit dem für beide Verdampfer ausgelegten verdichter zu betreiben, wodurch infolge des an sich für diesen Verdampfer überdimensionalen Verdichters der Verdampfungsdruck und somit die Verdampfungstemperatur in dem zur Kühlung des Gefrierfaches mit dem geringeren Nutzinhalt dienenden Verdampfers deutlich absinkt. Dadurch ist die Kälteleistung dieses Verdampfers deutlich gesteigert und somit ein wesentlich rascheres Durchgefrieren von frisch eingelegtem Gefriergut möglich. Ferner ergibt sich für das Gefrierfach mit dem geringeren Nutzinhalt bei gleicher Wärmeisolation dieses Faches ein geringerer Wärmeeinfall, wodurch ebenfalls die Verdampfungstemperatur absinkt und somit die Kälteleistung des Verdampfers gesteigert ist.The solution according to the invention makes it possible in a simple manner to operate the evaporator used to cool the freezer compartment with the lower useful content with the compressor designed for both evaporators, as a result of which the compressor, which is oversized for this evaporator, increases the evaporating pressure and thus the evaporating temperature the evaporator used to cool the freezer compartment with the lower useful content drops significantly. This significantly increases the cooling capacity of this evaporator, which means that freshly inserted frozen food can freeze through much more quickly. Furthermore, for the freezer compartment with the lower useful content, the same heat insulation of this compartment results in less heat, which also lowers the evaporation temperature and thus increases the cooling capacity of the evaporator.

Für die Kälteleistung gilt folgende Gleichung: Q = K · A · ΔT

Figure imgb0001

  • * Q = Kälteleistung [W]
  • K = Wärmedurchgangszahl [W/m2K]
  • A = Kontaktfläche Gefriergerät zu den Wärmetauschflächen [m2]
  • ΔT= Temperaturdifferenz zwischen der Gefrierware und dem zu verdampfenden Kältemittel
The following equation applies to the cooling capacity: Q = K · A · ΔT
Figure imgb0001
  • * Q = cooling capacity [W]
  • K = heat transfer coefficient [W / m 2 K]
  • A = freezer contact surface to heat exchange surfaces [m 2 ]
  • ΔT = temperature difference between the frozen goods and the refrigerant to be evaporated

Die Kälteleistung für das gesamte Gefriergerät ist dabei so ausgelegt, daß für das Gesamtgerät der nach Norm günstigste Energieverbrauch erzielt ist. Hierbei ist der Verdichter so ausgewählt, daß er bei den durch Normvorschriften vorgegebenen Bedingungen mit einem günstigen Wirkungsgrad arbeitet. Die Kältemittelmenge wird ebenfalls auf einen optimalen Energieverbrauch abgestimmt. Ferner sind die beiden Gefrierfächer des Gefriergerätes gleichzeitig nebeneinander betreibbar. Außerdem wird durch die Separierung der sich in dem zur Kühlung des Gefrierfaches größeren Nutzinhaltes dienenden Verdampfer befindliche Kältemittel vermieden, daß der Verdichter flüssiges Kältemittel ansaugen kann und somit schaden nimmt.The cooling capacity for the entire freezer is designed so that the most economical energy consumption is achieved for the entire device. Here, the compressor is selected so that it works with a favorable efficiency under the conditions specified by standard regulations. The amount of refrigerant is also matched to optimal energy consumption. Furthermore, the two freezer compartments of the freezer can be operated side by side at the same time. In addition, by separating the refrigerant located in the evaporator which serves to cool the freezer compartment, the refrigerant can prevent the compressor from sucking in liquid refrigerant and thus taking damage.

Besonders zweckmäßig und zeitoptimal ansteuerbar ist eine Absperreinrichtung, wenn nach einer vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß als Absperreinrichtung ein elektrisch ansteuerbares Absperrventil dient.A shut-off device is particularly expedient and can be activated in a time-optimized manner if, according to an advantageous embodiment of the object of the invention, it is provided that an electrically controllable shut-off valve serves as the shut-off device.

Gemäß einer bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß das Absperrventil in der Verbindungsleitung im wesentlichen zeitgleich mit dem Steuermittel bei dessen Ansteuerung des Verdampfers im Gefrierfach geringeren Nutzinhaltes von seinem Durchlaßbetrieb in seinen Sperrbetrieb umschaltet.According to a preferred embodiment of the subject matter of the invention, it is provided that the shut-off valve in the connecting line is essentially at the same time as the control means when the evaporator in the freezer compartment has a lower useful content, it switches from its pass mode to its blocking mode.

Durch eine solche Lösung ist sichergestellt, daß lediglich noch die zu einem Betrieb des Verdampfers zur Kühlung des Gefrierfaches geringeren Nutzinhaltes notwendige Kältemittel im Kältekreis verbleibt, wobei sich die Kältemittelmenge in etwa gleichmäßig auf beide Verdampfer verteilt hat, wenn sich der Verdichter für einen gewissen Zeitabschnitt in Dauerbetrieb befunden hatte.Such a solution ensures that only the refrigerant required to operate the evaporator for cooling the freezer compartment with less useful content remains in the refrigeration circuit, the amount of refrigerant being distributed approximately equally between the two evaporators when the compressor is in for a certain period of time Had been in continuous operation.

Entsprechend einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß die Verbindungsleitung an den zur Kühlung des Gefrierfaches mit geringerem Nutzinhalt dienendem Verdampfer bei wenigstens 50 % von dessen kältetechnisch wirksamen Verdampferfläche strömungstechnisch angebunden ist.According to a further preferred embodiment of the subject matter of the invention, it is provided that the connecting line is connected to the evaporator serving to cool the freezer compartment with a lower useful content at least 50% of its refrigeration-effective evaporator surface.

Auf diese Weise läßt sich für das Gefrierfach geringeren Nutzinhaltes während des Normalbetriebes des Gefriergerätes, in welchem sich beide Gefrierfächer im Kältekreislauf befinden, noch eine ausreichende Kühlung, beispielsweise für ein **-Gefrierfach erzeugen.In this way, sufficient cooling, for example for a ** freezer compartment, can still be generated for the freezer compartment with a lower useful content during normal operation of the freezer in which both freezer compartments are located in the refrigeration cycle.

Entsprechend einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß die Ankopplung der Verbindungsleitung an den zur Kühlung des Gefrierfaches geringeren Nutzinhaltes dienenden Verdampfer am zulaufseitigen Abschnitt seiner Verdampferfläche angeordnet ist.According to a next preferred embodiment of the subject matter of the invention, it is provided that the coupling of the connecting line to the evaporator serving to cool the freezer compartment has a smaller useful content is arranged on the inlet-side section of its evaporator surface.

Durch eine derartige Ankopplung der Verbindungsleitung lassen sich während des Normalbetriebes, bei welchem sich die Verdampfer beider Gefrierfächer im Kältekreislauf befinden, ausreichend tiefe Temperaturen erzeugen, so daß das Gefrierfach geringeren Nutzinhaltes auch während des Normalbetriebes als ***-Gefrierfach oder ****-Gefrierfach Anwendung finden kann.By connecting the connecting line in this way, sufficiently low temperatures can be generated during normal operation, in which the evaporators of both freezer compartments are in the refrigeration cycle, so that the freezer compartment has a smaller useful content than *** - freezer compartment or **** - even during normal operation. Freezer compartment can be used.

Eine zusätzliche Steigerung der Kälteleistung und somit der Einfriergeschwindigkeit im Gefrierfach geringeren Nutzinhaltes ergibt sich, wenn nach einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß im Gefrierfach geringerem Nutzinhaltes ein Ventilator angeordnet ist, welcher bei der Ansteuerung des in diesem Gefrierfach befindlichen Verdampfers durch das Steuermittel in Betrieb genommen wird.An additional increase in the refrigerating capacity and thus the freezing speed in the freezer compartment with a lower useful content results if, according to a further advantageous embodiment of the subject of the invention, it is provided that a fan is arranged in the freezer compartment with a smaller useful content, which is used to control the evaporator located in this freezer compartment the control means is put into operation.

Fertigungstechnisch besonders günstig aufbaubar ist das Verdampfersystem, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß dem zur Kühlung der Gefrierfächer dienenden Verdampfer in Strömungsrichtung des vom Verdichter angetriebenen Kältemittels je eine zu dessen Druckreduzierung dienende Drosseleinrichtung vorgeschaltet ist, welche im wesentlichen ein identisches Durchflußvolumen pro Zeiteinheit aufweisen.The evaporator system can be constructed particularly inexpensively in terms of production technology if, according to a next advantageous embodiment of the subject of the invention, it is provided that the evaporator serving to cool the freezer compartments is preceded in the flow direction of the refrigerant driven by the compressor, with a throttle device serving to reduce the pressure thereof, which is essentially a have identical flow volume per unit of time.

Eine besonders hohe Kälteleistung weist der zur Kühlung des Gefrierfaches größeren Nutzinhaltes dienende Verdampfer auf, wenn nach einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß die Ankopplung der Verbindungsleitung an den zur Kühlung des Gefrierfaches größeren Nutzinhaltes dienendem Verdampfer am auslaßseitigen Abschnitt einer Verdampferfläche angeordnet ist.The evaporator serving to cool the freezer compartment has a particularly high cooling capacity if, according to a further advantageous embodiment of the subject of the invention, it is provided that the coupling of the connecting line to the evaporator serving to cool the freezer compartment has a greater useful capacity on the outlet side Section of an evaporator surface is arranged.

Auf besonders einfache Weise mit einem geringen Aufwand von der Steuerung des Kältemittels dienenden Steuermittel sind beide Gefrierfächer des Gefriergerätes betreibbar, wenn nach einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß der zur Kühlung des Gefrierfaches größeren Nutzinhaltes dienende Verdampfer bei seiner Ansteuerung durch das Steuermittel dem anderen Verdampfer in Reihenschaltung vorgeschaltet und mit diesem über die Verbindungsleitung strömungstechnisch verbunden ist.Both freezer compartments of the freezer can be operated in a particularly simple manner with little effort from the control of the refrigerant if, according to a further preferred embodiment of the subject matter of the invention, it is provided that the evaporator serving to cool the freezer compartment has a larger useful content when activated by the Control means upstream of the other evaporator and connected to it in terms of flow technology via the connecting line.

Nach einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß die Verdampfer zur Kühlung der Gefrierfächer als Drahtrohrverdampfer mit in verschiedenen Höhenlagen angeordneten Verdampferetageren ausgebildet sind.According to a further preferred embodiment of the object of the invention, it is provided that the evaporators for cooling the freezer compartments are designed as wire tube evaporators with evaporator shelves arranged at different heights.

Durch eine derartige Lösung ist eine besonders günstige Kälteübertragung auf das Gefriergut gewährleistet.Such a solution ensures a particularly favorable transfer of cold to the frozen goods.

Besonders platzsparend sind die zur Kühlung der Gefrierfächer dienenden Verdampfer ausbildbar, wenn nach einer alternativen Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß die Verdampfer zur Kühlung der Gefrierfächer als Verdampferplatinen ausgebildet sind.The evaporators used to cool the freezer compartments can be formed in a particularly space-saving manner if, according to an alternative embodiment of the object of the invention, it is provided that the evaporators for cooling the freezer compartments are designed as evaporator boards.

Gemäß einer letzten bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß das Gefrierfach mit dem geringeren Nutzinhalt im Gehäuse des Gefriergerätes über dem Gefrierfach mit dem größeren Nutzinhalt angeordnet ist.According to a last preferred embodiment of the subject matter of the invention, it is provided that the freezer compartment with the lower useful content is arranged in the housing of the freezer above the freezer compartment with the larger useful content.

Eine Lösung gemaß diesen Merkmalen hat den Vorteil, daß neben einer erleichterten Beschickung des zum rascheren Ausgefrieren des Gefriergutes dienenden Gefrierfaches geringeren Nutzinhaltes eine deutlich günstigere Zugriffsmöglichkeit zur Kontrolle über den Ausgefrierzustand des Gefriergutes geschaffen ist.A solution according to these features has the advantage that, in addition to facilitating loading of the freezer compartment which serves to freeze the frozen goods more quickly, a significantly more favorable access option is provided for checking the freezer condition of the frozen goods.

Die Erfindung ist in der nachfolgenden Beschreibung anhand eines in der beigefügten Zeichnung vereinfacht dargestellten Ausführungsbeispieles erläutert. Es zeigen.

Fig. 1
einen Haushalts-Gefrierschrank in schematischer Darstellung mit zwei thermisch voneinander getrennten, einen unterschiedlichen Nutzinhalt aufweisenden Gefrierfächern, mit darin angeordneten Verdampfern und einen zu deren Versorgung mit Kältemittel dienenden Kältekreis mit einem Magnetventil in einer ersten, beide Verdampfer in Reihenschaltung mit Kältemittel beaufschlagenden Arbeitsstellung und
Fig. 2
den Haushalts-Gefrierschrank gemäß Fig. 1, jedoch das Magnetventil in seiner zweiten, lediglich dem Verdampfer im Gefrierfach geringeren Nutzinhaltes mit Kältemittel beaufschlagenden Arbeitsstellung.
The invention is explained in the following description with reference to an embodiment shown in simplified form in the accompanying drawing. Show it.
Fig. 1
a household freezer in a schematic representation with two thermally separated, different useful contents freezer compartments, with evaporators arranged therein and a refrigeration circuit serving to supply them with refrigerant with a solenoid valve in a first, both evaporators in series connection with refrigerant working position and
Fig. 2
1, but the solenoid valve in its second working position, which only uses the evaporator in the freezer compartment with refrigerant in a lower useful capacity.

In Fig. 1 ist ein rein schematisch dargestellter Haushalts-Gefrierschrank 10 gezeigt, in dessen wärmeisolierendem Gehäuse 11 zwei übereinander angeordnete Gefrierfächer 12 und 13 vorgesehen sind. Diese sind durch einen wärmeisolierend ausgebildeten Zwischenboden 14 thermisch voneinander getrennt und weisen einen unterschiedlich großen Nutzinhalt auf, wobei das mit dem geringeren Nutzinhalt ausgestattete Gefrierfach 12 obenliegend angeordnet ist.1 shows a purely schematically illustrated household freezer 10, in the heat-insulating housing 11 of which two freezer compartments 12 and 13 arranged one above the other are provided. These are thermally separated from one another by a heat-insulating intermediate floor 14 and have a useful content of different sizes, the freezer compartment 12 having the lower useful content being arranged on top.

Der Haushalts-Gefrierschrank 10 ist mit einer Kälteanlage 15 ausgestattet, welche einen zur gleichzeitigen Kühlung der beiden Gefrierfächer 12 und 13 ausgelegten Kältemittelverdichter 16 aufweist. An den Kältemittelverdichter 16 ist druckseitig ein Verflüssiger 17 angeschlossen, welcher ausgangsseitig mit einem als Steuermittel dienden, elektrisch ansteuerbaren 3/2-Wegemagnetventil 18 verbunden ist. Das Magnetventil 18, welches durch eine elektronische Auswerteschaltung in Abhängikeit der im Gefrierfach 13 herrschenden Temperatur angesteuert und in zwei unterschiedliche Arbeitsstellungen I und II bringbar ist, weist an seinen beiden Ausgängen je ein zur Druckreduzierung des vom Verflüssiger 17 zuströmenden flüssigen Kältemittels dienende Drosselrohre 19 und 20 auf, welche spiralenartig ausgebildet sind und welche einen identischen Durchflußwiderstand für flüssiges Kältemittel aufweisen. Das Drosselrohr 19 ist der Zulaufseite eines als Verdampferplatine ausgebildeten, im Gefrierfach 12 angeordneten Verdampfers 21 vorgesehen, dessen Kältemittel-Kanalanordnung 22 in Windungen auf der Verdampferplatine ausgebildet ist. Der Verdampfer 21 ist ausgangsseitig mit der Saugseite des Kältemittelverdichters 16 verbunden und weist auf seiner dem Drosselrohr 19 zugewandten Einlaufseite eine nahe seiner nicht dargestellten Kältemittel-Einspritzstelle angeordnete Anschlußstelle 23 auf. Diese dient zur strömungstechnischen Anbindung der Kältemittel-Kanalanordnung 22 des Verdampfers 21 an eine Verbindungsleitung 24, deren Durchflußquerschnitt durch eine als elektrisch ansteuerbares Absperrventil 25 ausgebildete Absperreinrichtung absperrbar ist. Durch den kältetechnischen Anschluß der Verbindungsleitung 24 an die Kältemittel-Kanalanordnung 22 des Verdampfers 21 ist flüssiges Kältemittel aus der Verbindungsleitung 24 nahezu über 100 % der kältetechnisch wirksamen Verdampferfläche des Verdampfers 21 geführt, so daß eine hohe Kälteleistung für diesen erzeugt ist. Der Verdampfer 21 ist über die Verbindungsleitung 24 mit einem im Gefrierfach 13 angeordneten, ebenso platinenartig ausgebildeten Verdampfer 26 strömungstechnisch verbunden. Zum Anschluß der Verbindungsleitung 24 an den Verdampfer 26 ist am auslaufseitigen Ende seiner Kältemittel-Kanalanordnung 27 eine Anschlußstelle 28 vorgesehen, während das einlaufseitige Ende der Kältemittel-Kanalanordnung 27 mit dem Drosselrohr 20 verbunden ist.The household freezer 10 is equipped with a refrigeration system 15, which has a refrigerant compressor 16 designed for simultaneous cooling of the two freezer compartments 12 and 13. A condenser 17 is connected on the pressure side to the refrigerant compressor 16 and is connected on the output side to an electrically controllable 3/2-way solenoid valve 18 which serves as control means. The solenoid valve 18, which is controlled by an electronic evaluation circuit depending on the temperature prevailing in the freezer compartment 13 and can be brought into two different working positions I and II, has at its two outputs a throttle tube 19 and 20 serving to reduce the pressure of the liquid refrigerant flowing from the condenser 17 which are spiral-shaped and which have an identical flow resistance for liquid refrigerant. The throttle tube 19 is provided on the inlet side of an evaporator 21, which is designed as an evaporator board and is arranged in the freezer compartment 12, the refrigerant channel arrangement 22 of which is formed in turns on the evaporator board. The evaporator 21 is connected on the outlet side to the suction side of the refrigerant compressor 16 and, on its inlet side facing the throttle tube 19, has a connection point 23 arranged close to its refrigerant injection point (not shown). This serves for the fluidic connection of the refrigerant channel arrangement 22 of the evaporator 21 to a connecting line 24, the flow cross section of which can be shut off by a shut-off device designed as an electrically controllable shut-off valve 25 is. Due to the refrigeration connection of the connecting line 24 to the refrigerant channel arrangement 22 of the evaporator 21, liquid refrigerant from the connecting line 24 is guided almost over 100% of the refrigeration-effective evaporator area of the evaporator 21, so that a high cooling capacity is generated for the latter. The evaporator 21 is connected in terms of flow technology via the connecting line 24 to an evaporator 26 which is arranged in the freezer compartment 13 and is also formed in the manner of a board. To connect the connecting line 24 to the evaporator 26, a connection point 28 is provided at the outlet-side end of its refrigerant channel arrangement 27, while the inlet-side end of the refrigerant channel arrangement 27 is connected to the throttle tube 20.

In den Figuren 1 und 2 sind durch verstärkt ausgezogene Linien unterschiedliche Betriebszustände des Haushalts-Gefrierschrankes 10 und der Kälteanlage 15 dargestellt, wobei der in Fig. 1 gezeigte Betriebszustand den Normalbetrieb zeigt, in welchem das Magnetventil 18 in seiner Arbeitsstellung II und das Absperrventil 25 in seinem Durchlaßbetrieb betrieben ist, so daß der Verdampfer 26 im Gefrierfach 13 dem Verdampfer 21 im Gefrierfach 12 in Reihenschaltung vorgeschaltet ist. In dieser Arbeitsstellung II des Magnetventils 18 wird der vom Kältemittelverdichter 16 erzeugte Kältemittelfluß zu seiner Druckabsenkung auf dem verdampferspezifischen Betriebsdruck des Verdampfers 26 dem Drosselrohr 20 zugeführt, von wo es über den nicht dargestellte Einspritzstelle des Verdampfers 26 in dessen Kältemittel-Kanalanordnung 27 überströmt. Am auslaufseitigen Ende der Kältemittel-Kanalanordnung 27 tritt der Kältemittelstrom über die Anschlußstelle 28 in die Verbindungsleitung 24 ein und wird über die Anschlußstelle 23 der Kältemittel-Kanalanordnung 22 des Verdampfers 21 zugeführt, von wo es an der Ausgangsseite der Kältemittel-Kanalanordnung 22 im gasförmigen Zustand von der Saugseite des Kältemittelverdichters 16 angesaugt ist. Durch die Arbeitsstellung II des Magnetventils 18 sind beide Verdampfer 21 und 26 mit flüssigen Kältemittel beaufschlagt, so daß die Gefrierfächer 12 und 13 ihre bestimmungsgemäße Betriebstemperatur erreichen.In Figures 1 and 2 different operating states of the household freezer 10 and the refrigeration system 15 are shown by solid lines, the operating state shown in Fig. 1 showing the normal operation in which the solenoid valve 18 in its working position II and the shut-off valve 25 in its pass mode is operated so that the evaporator 26 in the freezer compartment 13 is connected in series to the evaporator 21 in the freezer compartment 12. In this working position II of the solenoid valve 18, the refrigerant flow generated by the refrigerant compressor 16 is fed to the throttle tube 20 to lower its pressure to the evaporator-specific operating pressure of the evaporator 26, from where it flows over the injection point of the evaporator 26, not shown, in its refrigerant channel arrangement 27. At the outlet end of the refrigerant channel arrangement 27, the refrigerant flow enters the connecting line 24 via the connection point 28 and becomes Via the connection point 23 of the refrigerant channel arrangement 22 of the evaporator 21, from where it is sucked in at the outlet side of the refrigerant channel arrangement 22 in the gaseous state from the suction side of the refrigerant compressor 16. Due to the working position II of the solenoid valve 18, both evaporators 21 and 26 are charged with liquid refrigerant, so that the freezer compartments 12 and 13 reach their intended operating temperature.

Nachdem der Haushalts-Gefrierschrank 10 für einige Zeit in seinem beide Gefrierfächer 12 und 13 kühlenden "Normalbetrieb" betrieben worden ist, ist das flüssige Kältemittel in etwa gleichmäßig in dem Verdampfersystem, bestehend aus dem Verdampfer 21 und dem Verdampfer 26, verteilt. Wird nun das Magnetventil 18 durch die manuelle Betätigung eines nicht gezeigten elektrischen Schalters zum Zwecke eines raschen Eingefriervorganges im Gefrierfach 12 in seine Arbeitsstellung I umgeschaltet, wobei gleichzeitig mit dem Umschaltvorgang des Magnetventils 18 das Absperrventil 25 in seinen Sperrbetrieb übergeht, ist das im Verdampfer 26 befindliche flüssige Kältemittel aus dem Kältekreis des Kältemittelverdichters 16 ausgekoppelt. Der Kältemittelverdichter 16, der an sich hinsichtlich seines Fördervolumens auf die Versorgung beider Verdampfer 21 und 26 mit flüssigem Kältemittel ausgelegt ist, wird quasi stark unterfüllt betrieben. Dies äußert sich in einer starken Herabsetzung des Verdampfungsdrucks für das Kältemittel und somit einer wesentlichen Absenkung der Verdampfungstemperatur, welche zusätzlich durch den geringeren Wärmeeinfall aufgrund des geringeren Nutzinhaltes des Gefrierfaches 12 günstig beeinflußt ist. Das im Kältemittel-Kreislauf verbliebene flüssige Kältemittel wird vom Kältemittelverdichter 16 über das Magnetventil in seiner Arbeitsposition I dem Drosselrohr 19 zugeführt, von wo es über die nicht dargestellte Einspritzstelle des Verdampfers 21, welcher allein im Kältekreislauf mit dem Verdichter 16 liegt, der Kältemittel-Kanalanordnugn 22 des Verdampfers 21 zugeführt ist, von wo es über die Ausgangsseite der Kältemittel-Kanalanordnung 22 der Saugseite des Verdichters 16 zugeführt ist.After the domestic freezer 10 has been operated for some time in its "normal operation", which cools both freezer compartments 12 and 13, the liquid refrigerant is distributed approximately uniformly in the evaporator system, consisting of the evaporator 21 and the evaporator 26. If the solenoid valve 18 is now switched to its working position I by the manual actuation of an electrical switch (not shown) for the purpose of a quick freezing process in the freezer compartment 12, the shut-off valve 25 going into its blocking operation simultaneously with the switching process of the solenoid valve 18, that is in the evaporator 26 decoupled liquid refrigerant from the refrigerant circuit of the refrigerant compressor 16. The refrigerant compressor 16, which is designed per se with regard to its delivery volume to supply both evaporators 21 and 26 with liquid refrigerant, is operated in a largely underfilled manner. This manifests itself in a sharp reduction in the evaporation pressure for the refrigerant and thus a substantial reduction in the evaporation temperature, which is additionally favorably influenced by the lower heat input due to the lower useful content of the freezer compartment 12. The liquid refrigerant remaining in the refrigerant circuit is discharged from the refrigerant compressor 16 via the solenoid valve Working position I is supplied to the throttle tube 19, from where it is supplied to the refrigerant channel arrangement 22 of the evaporator 21 via the injection point (not shown) of the evaporator 21, which is only in the refrigeration circuit with the compressor 16, from where it is via the outlet side of the refrigerant channel arrangement 22 is fed to the suction side of the compressor 16.

Für den Fall, daß während des Eingefriervorganges im Gefrierfach 12 die Temperatur im Gefrierfach 13 unzulässig hoch ansteigt, wird das Magnetventil 18 durch eine die Temperatur im Gefrierfach 13 auswertende, elektronische Auswerteschaltung (nicht gezeigt) in seine Arbeitsstellung II umgeschaltet, wodurch der Verdampfer 26 zur Kühlung des Gefrierfaches 13 wieder in den Kältemittelkreis eingekoppelt ist.In the event that the temperature in the freezer compartment 13 rises to an unacceptably high level during the freezing process in the freezer compartment 12, the solenoid valve 18 is switched to its working position II by an electronic evaluation circuit (not shown) evaluating the temperature in the freezer compartment 13, as a result of which the evaporator 26 becomes Cooling of the freezer compartment 13 is coupled back into the refrigerant circuit.

Nachdem die für ein rasches Durchgefrieren im Gefrierfach 12 notwendige Tiefkühltemperatur erreicht ist, schaltet die elektronische Auswerteschaltung die beiden Steuermittel in ihren beide Gefrierfächer 12 und 13 mit Kältemittel beaufschlagenden Betriebszustand um.After the freezer temperature required for rapid freezing in the freezer compartment 12 has been reached, the electronic evaluation circuit switches the two control means into their operating state which applies refrigerant to both the freezer compartments 12 and 13.

Entgegen dem beschriebenen Ausführungsbeispiel können die Verdampfer 21 und 26 auch als Drahtrohrverdampfer mit in verschiedenen Höhenlagen angeordneten Verdampferetageren ausgebildet sein.Contrary to the exemplary embodiment described, the evaporators 21 and 26 can also be designed as a wire tube evaporator with evaporator stages arranged at different heights.

Zur Steigerung der Gefriergeschwindigkeit kann im Gefrierfach 12 zusätzlich ein die Kühlluft darin umwälzender Ventilator vorgesehen sein, wodurch sich eine günstigere Wärmeübertragung vom Verdampfer 21 auf das in dem Gefrierfach eingelagerte Gefriergut ergibt.To increase the freezing speed, a fan circulating the cooling air therein can additionally be provided in the freezer compartment 12, which results in more favorable heat transfer from the evaporator 21 to the frozen goods stored in the freezer compartment.

Gute Gefriergeschwindigkeiten für das Gefriergut im Gefrierfach 12 haben sich bereits ergeben, wenn dessen Nutzinhalt kleiner oder gleich einem Fünftel des Nutzinhaltes des Gefrierfaches 13 ist.Good freezing speeds for the frozen food in the freezer compartment 12 have already been obtained if its useful content is less than or equal to one fifth of the useful content of the freezer compartment 13.

Claims (12)

Gefriergerät mit wenigstens zwei innerhalb seines wärmeisolierenden Gehäuses angeordneten, thermisch voneinander getrennten Gefrierfächern, von denen jedes von einem Verdampfer gekühlt ist, welche über eine Verbindungsleitung strömungstechnisch miteinander verbunden und welche über ein Steuermittel mit Kältemittel beaufschlagbar sind, dadurch gekennzeichnet, daß die Gefrierfächer (12, 13) mit unterschiedlichem Nutzinhalt ausgestattet sind, wobei der zur Kühlung des Gefrierfaches (13) mit dem größeren Nutzinhalt dienende Verdampfer (26) durch eine in der Verbindungsleitung (24) angeordnete Absperreinrichtung aus dem Kältemittelfluß auskoppelbar ist und als Reservoir für flüssiges Kältemittel dient.Freezer with at least two thermally separated freezer compartments arranged within its heat-insulating housing, each of which is cooled by an evaporator, which are fluidically connected to one another via a connecting line and which can be acted upon with refrigerant via a control means, characterized in that the freezer compartments (12, 13) are equipped with different useful contents, the evaporator (26) serving to cool the freezer compartment (13) with the greater useful content being able to be coupled out of the refrigerant flow by a shut-off device arranged in the connecting line (24) and serving as a reservoir for liquid refrigerant. Gefriergerät nach Anspruch 1, dadurch gekennzeichnet, daß als Absperreinrichtung ein elektrisch ansteuerbares Absperrventil (25) dient.Freezer according to claim 1, characterized in that an electrically controllable shut-off valve (25) serves as the shut-off device. Gefriergerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das in der Verbindungsleitung (24) angeordnete Absperrventil (25) im wesentlichen zeitgleich mit dem Steuermittel bei dessen Ansteuerung des Verdampfers (21) im Gefrierfach (12) geringeren Nutzinhaltes von seinem Durchlaßbetrieb in seinen sperrbetrieb umschaltet.Freezer according to claim 1 or 2, characterized in that the shut-off valve (25) arranged in the connecting line (24) essentially at the same time as the control means when the evaporator (21) in the freezer compartment (12) is actuated and has a lower useful content from its passage mode to its blocking mode toggles. Gefriergerät nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Verbindungsleitung an den zur Kühlung des Gefrierfaches (12) mit geringerem Nutzinhalt dienenden Verdampfer (21) bei wenigstens 50 % von dessen kältetechnisch wirksamen Verdampferfläche strömungstechnisch angebunden ist.Freezer according to one of claims 1 to 3, characterized in that the connecting line is connected to the evaporator surface (21), which serves to cool the freezer compartment (12) and has a smaller useful content, at least 50% of its refrigeration-effective evaporator surface. Gefriergerät nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Ankoppelung der Verbindungsleitung (24) an den zur Kühlung des Gefrierfaches (12) geringeren Nutzinhaltes dienenden Verdampfer (21) am zulaufseitigen Abschnitt seiner Verdampferfläche angeordnet ist.Freezer according to one of claims 1 to 4, characterized in that the coupling of the connecting line (24) to the evaporator (21), which serves to cool the freezer compartment (12) and has a smaller useful content, is arranged on the inlet-side section of its evaporator surface. Gefriergerät nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß im Gefrierfach (12) geringeren Nutzinhaltes ein Ventilator angeordnet ist, welcher bei der Ansteuerung des in diesem Gefrierfach (12) befindlichen Verdampfers (21) durch das Steuermittel in Betrieb genommen ist.Freezer according to one of claims 1 to 5, characterized in that a fan is arranged in the freezer compartment (12) with a smaller useful content, which is operated by the control means when the evaporator (21) located in this freezer compartment (12) is activated. Gefriergerät nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß den zur Kühlung der Gefrierfächer (12, 13) dienenden Verdampfern (21, 26) in Strömungsrichtung des vom Verdichter (16) angetriebenen Kältemittels eine zu dessen Druckreduzierung dienende Drosseleinrichtung (19 , 20) vorgeschaltet ist, welche im wesentlichen ein identisches Durchflußvolumen pro Zeiteinheit aufweisen.Freezer according to one of claims 1 to 6, characterized in that the evaporators (21, 26) serving to cool the freezer compartments (12, 13) in the direction of flow of the refrigerant driven by the compressor (16) has a throttle device (19, 20 ) is connected upstream, which essentially have an identical flow volume per unit of time. Gefriergerät nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Ankopplung der Verbindungsleitung (24) an den zur Kühlung des Gefrierfaches (13) größeren Nutzinhaltes dienenden Verdampfer (26) am auslaßseitigen Abschnitt seiner Verdampferfläche angeordnet ist.Freezer according to one of claims 1 to 7, characterized in that the coupling of the connecting line (24) is arranged on the evaporator (26), which serves to cool the freezer compartment (13) and has a larger useful content, on the outlet-side section of its evaporator surface. Gefriergerät nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der zur Kühlung des Gefrierfaches (13) größeren Nutzinhaltes dienende Verdampfer (26) bei seiner Ansteuerung durch das Steuermittel dem anderen Verdampfer (21) in Reihenschaltung vorgeschaltet und mit diesem über die Verbindungsleitung (24) strömungstechnisch verbunden ist.Freezer according to one of claims 1 to 8, characterized in that the evaporator (26), which serves to cool the freezer compartment (13) and has a larger useful content, is connected upstream of the other evaporator (21) when it is controlled by the control means and connected with it via the connecting line ( 24) is fluidly connected. Gefriergerät nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Verdampfer (21, 26) zur Kühlung der Gefrierfächer (12, 13) als Drahtrohrverdampfer mit in verschiedenen Höhenlagen angeordneten Verdampferetageren ausgebildet sind.Freezer according to one of claims 1 to 9, characterized in that the evaporators (21, 26) for cooling the freezer compartments (12, 13) are designed as wire-tube evaporators with evaporator shelves arranged at different heights. Gefriergerät nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Verdampfer (21, 26) zur Kühlung der Gefrierfächer (12, 13) als Verdampferplatinen ausgebildet sind.Freezer according to one of claims 1 to 9, characterized in that the evaporators (21, 26) for cooling the freezer compartments (12, 13) are constructed as evaporator boards. Gefriergerät nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß das Gefrierfach (12) mit dem geringeren Nutzinhalt im Gehäuse (11) des Gefriergerätes (10) über dem Gefrierfach (13) mit dem größeren Nutzinhalt angeordnet ist.Freezer according to one of claims 1 to 11, characterized in that the freezer compartment (12) with the lower useful content is arranged in the housing (11) of the freezer (10) above the freezer compartment (13) with the larger useful content.
EP96112097A 1995-09-21 1996-07-25 Refrigeration apparatus Expired - Lifetime EP0789206B1 (en)

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DE19535144A DE19535144A1 (en) 1995-09-21 1995-09-21 Domestic freezer with fast-freeze facility

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WO2002008676A1 (en) * 2000-07-20 2002-01-31 BSH Bosch und Siemens Hausgeräte GmbH Refrigeration device
CN100347498C (en) * 2001-09-13 2007-11-07 Bsh博施及西门子家用器具有限公司 Refrigerating appliance comprising two evaporators
CN100398948C (en) * 1999-11-30 2008-07-02 Bsh博施及西门子家用器具有限公司 Refrigeration device
RU2447374C2 (en) * 2006-12-22 2012-04-10 Бсх Бош Унд Сименс Хаусгерете Гмбх Chilling machine
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DE19535144A1 (en) 1997-03-27
TR199600709A2 (en) 1997-04-22
ES2208710T3 (en) 2004-06-16
EP0789206A3 (en) 2000-05-31
SI0789206T1 (en) 2004-02-29
EP0789206B1 (en) 2003-10-01
DE59610749D1 (en) 2003-11-06

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