EP2625477B1 - Refrigerator with a cold accumulator - Google Patents

Refrigerator with a cold accumulator Download PDF

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Publication number
EP2625477B1
EP2625477B1 EP11757654.6A EP11757654A EP2625477B1 EP 2625477 B1 EP2625477 B1 EP 2625477B1 EP 11757654 A EP11757654 A EP 11757654A EP 2625477 B1 EP2625477 B1 EP 2625477B1
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EP
European Patent Office
Prior art keywords
evaporator
interior
cold
heat
refrigeration
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EP11757654.6A
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German (de)
French (fr)
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EP2625477A2 (en
Inventor
Bertram Wolf
Frank Bailly
Jörg STELZER
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Va Q Tec AG
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Va Q Tec AG
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Publication of EP2625477A2 publication Critical patent/EP2625477A2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/006Self-contained movable devices, e.g. domestic refrigerators with cold storage accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D16/00Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators

Definitions

  • the invention relates to a refrigerator, in particular a household refrigerator, which has a cold store.
  • the DE 695 00 621 T2 discloses a refrigerator with a freezer compartment that communicates with another compartment.
  • the further compartment has an evaporator for cooling the air of the compartment.
  • the evaporator is assigned a cold store, which consists of a battery of cold stores, which in turn are separated from the evaporator by an intermediate space and are arranged at a mutual distance.
  • the US 4,928,501A describes a rollable refrigerated container with a cooling attachment, which is coupled to two openings on an upper side of the refrigerated container.
  • the JP S85 219379 A shows a generic refrigeration device with an inner container with a coolable interior for storing refrigerated goods, an air duct is coupled to the interior via openings.
  • a cold store with a storage material is arranged within the air duct.
  • An evaporator is partially arranged in the air duct.
  • the known refrigeration device has a fan that directs an air flow through the air duct via the evaporator and the cold store and then into the interior.
  • the air duct and the coolable interior are separated from each other by a heat-insulating wall.
  • the cold store is connected to the evaporator in a heat-conducting manner.
  • the object of the present invention is to provide an improved refrigeration appliance, in particular an improved household refrigeration appliance with a cold store.
  • a refrigeration device comprising an inner container with a coolable interior for storing refrigerated goods, an air duct coupled via openings to the interior, a cold accumulator arranged within the air duct with a storage material, and one Refrigeration circuit with an evaporator arranged in the air duct, the air duct and the coolable interior being separated from one another by a heat-insulating wall.
  • a refrigeration device is understood in particular to be a household refrigeration device, i.e. a refrigeration device that is used for household management in households or possibly also in the catering sector, and in particular serves to store food and / or beverages in normal household quantities at certain temperatures, such as a refrigerator, a freezer , a fridge-freezer, a freezer or a wine storage cabinet.
  • the cooling device according to the invention is preferably a household cooling device, so that the coolable interior is designed as a cooling room, the desired temperature of which is above the freezing point.
  • the refrigeration device according to the invention accordingly comprises the coolable interior and the air duct separated from the interior, which is coupled to the interior via the openings.
  • the evaporator and the cold store Arranged within the air duct are the evaporator and the cold store, which are provided to cool the coolable interior space via the openings.
  • Cold stores known in principle to those skilled in the art, include the storage material, e.g. a so-called PCM (phase change material), which is intended to store cold.
  • Suitable storage materials are, for example, substances or mixtures of substances which have a melting point (or phase change point) below the desired temperature of the coolable interior.
  • Suitable storage materials are e.g. Brine solutions with a melting point of, for example, ⁇ 4 ° C in the case of a household refrigerator.
  • the air duct and the coolable interior are separated by the heat-insulating wall.
  • the interior and the air duct are thermally insulated from one another, which enables improved temperature setting or temperature control of the coolable interior. This is particularly advantageous if the coolable interior is a cold room that is cooled to temperatures above freezing.
  • the cold store In order to cool the cold store or its storage material particularly quickly or efficiently, the cold store is connected to the evaporator in a heat-conducting manner.
  • the evaporator is designed as a finned evaporator.
  • the fins of the evaporator designed as a finned evaporator protrude into the cold accumulator.
  • a fan which can be controlled by means of a control device of the refrigeration device according to the invention is provided and is designed to blow air cooled by the cold store and by the evaporator from the air duct into the interior.
  • the fan is arranged in the upper opening of the air duct or at least in the region of the upper opening of the air duct if the air duct is at least largely vertical.
  • the temperature setting or temperature control of the coolable interior can be carried out particularly well if, according to a variant of the refrigeration device according to the invention, the heat-insulating wall is designed such that it essentially completely prevents heat transfer between the air duct and the coolable interior.
  • the air duct can run at least for the most part vertically. It can then be provided that the air duct is provided with one of the openings at both ends.
  • a household refrigeration device with a PCM (phase change material) tank or, in general, cold storage, the storage material of which, in particular in the frozen state, serves as a cold accumulator is provided.
  • the cold store is thermally coupled to the evaporator, which is part of a refrigeration cycle of the refrigeration device according to the invention, which may be designed as a cooling device.
  • a cold vapor compression circuit can preferably be used as the cooling circuit.
  • the PCM tank or the cold storage is from the interior of the refrigerator (coolable interior) separated by additional insulation or by the heat-insulating wall, which means that it can be cooled, possibly largely frozen, independently of the temperature of the interior.
  • one or more fans can be used to direct the air in the interior, in particular in a targeted manner, through air guide channels via the evaporator and the PCM tank.
  • Substances or mixtures of substances which have a melting point (or phase change point) below the desired interior temperature can be used as the PCM material or storage material.
  • these are brine solutions with a melting point of ⁇ 4 ° C.
  • the regulation of the interior temperature in the refrigeration device according to the invention can preferably take place via the amount of air which is conducted via the evaporator and / or the PCM tank (cold storage).
  • the heat can be transferred from the air to the evaporator and / or to the PCM tank.
  • the heat can be transferred directly to the evaporator and thus possibly to the refrigerant of the refrigeration cycle.
  • the heat is transferred to the PCM tank (generally: cold storage) and thus to the PCM material (generally: storage material), which slowly thaws or heats up.
  • the relatively low power requirement of the fans, if any, and the control electronics or the control device of the refrigeration device according to the invention can be covered, for example, by a rechargeable battery, so that the refrigeration device according to the invention can be operated completely independently of the mains over a certain period of time with relatively low power consumption from the battery.
  • the refrigeration device according to the invention allows it to be operated completely independently of the network over a longer period of time without any restriction or at least without major restrictions in user behavior.
  • the subsequent cooling down of the PCM tank or the storage material of the cold storage takes place in particular automatically during network operation.
  • the Fig. 1 shows a household refrigerator 1 as an example of a refrigerator not according to the invention in a sectional view.
  • the household cooling device 1 has an inner container 2 with a coolable interior 3.
  • the coolable interior 3 is intended to store refrigerated goods.
  • a door leaf 4 is pivotally attached to the inner container 2 so that the interior 3 is accessible.
  • a compartment or a separate air duct 5, which is separated from the coolable inner space 3, is arranged in the rear part of the inner container 2 and, in the case of the present exemplary embodiment, is delimited by the rear wall 6 of the inner container 3 and a vertically extending wall 7.
  • the wall 7 comprises a heat-insulating material or is made of a heat-insulating material, so that the wall 7 essentially completely prevents heat transfer.
  • the air duct 5 runs essentially over the entire height of the interior 3. It has an upper opening 8 in the upper region and a lower opening 9 in the lower region, via which an air exchange between the air duct 5 and the coolable interior 3 is made possible.
  • an evaporator 10 is arranged within the air duct 5.
  • the evaporator 10 is designed in particular as a plate evaporator and extends in particular almost over the entire height of the air duct 5.
  • the evaporator 10 is part of a compressor refrigeration circuit which, in addition to the evaporator 10, comprises a condenser 11 and a compressor 12.
  • the compressor refrigeration cycle is in particular designed as a cold vapor compression cycle and is supplied with electrical energy by means of an electrical energy supply network, not shown in detail.
  • the household cooling device 1 further comprises a cold storage 13 arranged inside the air duct 5, in which a storage material 14, a so-called PCM (phase change material), is arranged.
  • a storage material 14 is known in principle to the person skilled in the art and is intended to store cold.
  • substances or mixtures of substances which have a melting point (or phase change point) below the desired temperature of the coolable interior 3 are used as the storage material 14.
  • Suitable storage materials 14 are e.g. Brine solutions with a melting point of ⁇ 4 ° C.
  • the cold store 13 is connected to the evaporator 10 in a heat-conducting manner.
  • the evaporator 10 touches the cold store 13.
  • the compressor refrigeration circuit can be connected, for example, to a control device of the household cooling device 1, which is not shown in detail, in order to be switched on and off as required in order to cool the storage material 14 of the cold store 13.
  • the household cooling device 1 also has a fan 15, which is connected in particular to the control device and is designed to conduct an air flow over the evaporator 10 and / or the cold store 13 if necessary.
  • the air flow is particularly from the interior 3 via the upper one when the fan 15 is switched on Opening 8 in the air duct 5 and passed through the lower opening 9 from the air duct 5 into the interior 3.
  • the air flow is cooled by the evaporator 10 and / or by the cold store 13, as a result of which the interior 3 is cooled.
  • the temperature of the coolable interior 3 is regulated or controlled via the amount of air which is passed via the evaporator 10 and / or the cold store 13.
  • the heat can be transferred from the air to the evaporator 10 and / or to the cold store 13.
  • the amount of air is controlled by the fan 15.
  • the control device of the household cooling device 1 is configured, for example, to switch the fan 15 on and off as required on the basis of a target temperature of the interior 3 and on the basis of a measured or determined actual temperature of the interior 3.
  • mains operation i.e. if the household cooling device 1 is supplied with electrical energy from the electrical power supply network, the heat can be transferred directly to the evaporator 10 and thus to the refrigerant of the refrigeration cycle.
  • the household cooling device 1 is operated independently of the network, then the household cooling device 1 is not supplied with electrical energy from the energy supply network. Then the heat is transferred to the cold storage 13 and thus to the storage material 14, which thereby slowly thaws or heats up.
  • the relatively low electrical current requirement of the fan 15 and the control device can be covered by a rechargeable, relatively small rechargeable battery, which is not shown in any more detail, as a result of which a completely mains-independent operation of the household cooling device 1 with a relatively low power consumption from the rechargeable battery is possible over a certain period of time.
  • the Fig. 2 shows a further household refrigerator 21 as an example of a refrigerator according to the invention in a sectional view. Unless otherwise described, they are part of the Fig. 2 shown household refrigerator 21, which with components of the in Fig. 1 shown household refrigeration device 1 are essentially identical in construction and function, provided with the same reference numerals.
  • Fig. 2 shown household refrigerator 21 differs substantially from that in the Fig. 1 Household cooling device 1 shown in that the cold storage 13 is arranged in an upper region of the inner container 2 and below the cold storage 13, a no-frost cooling unit or its evaporator 22 is arranged.
  • the evaporator 22 is connected to the cold storage 13 in a heat-conducting manner.
  • the evaporator 22 is designed as a finned vaporizer, the fins of which protrude into the cold accumulator 13.
  • the no-frost cooling unit is supplied with electrical energy by means of an electrical energy supply network (not shown in more detail) and is connected to a control device (not shown in more detail) of the household cooling device 21 in order to be switched on and off as required, in order, inter alia, to to cool the storage material 14 of the cold storage 13.
  • the household refrigeration device 21 likewise comprises a compartment or the air duct 5, which is separated in the rear part of the inner container 2 and from the coolable interior 3, which in the present exemplary embodiment is delimited by the rear wall 6 of the inner container 3 and a vertically extending wall 7.
  • the wall 7 comprises a heat-insulating material or is made of a heat-insulating material, so that the wall 7 essentially completely prevents heat transfer.
  • the air duct 5 has a horizontally running wall 27 which adjoins the vertically running wall 7 and which likewise comprises a heat-insulating material or is made of a heat-insulating material, so that the horizontally running wall 27 also essentially completely transfers heat prevented.
  • the evaporator 22 lies in particular on the horizontally extending wall 27.
  • the air duct 5 has an upper opening 28 in the upper region, a middle opening 23 in the middle region and a lower opening 29 in the lower region, via which an air exchange between the air duct 5 and the coolable interior space 3 is made possible.
  • the household cooling device 21 also has a fan 25 which is connected to the control device and which is set up to direct an air flow over the evaporator 22 and / or the cold store 13 if required.
  • a fan 25 which is connected to the control device and which is set up to direct an air flow over the evaporator 22 and / or the cold store 13 if required.
  • the air flow is conducted from the interior 3 via the upper opening 28 into the air duct 5 and via the middle and lower openings 23, 29 from the air duct 5 into the interior 3.
  • the air flow is cooled by the evaporator 22 and / or by the cold store 13, as a result of which the interior 3 is cooled.
  • the temperature of the coolable interior 3 is regulated or controlled via the amount of air which is passed via the evaporator 22 and / or the cold store 13.
  • the heat can be transferred from the air to the evaporator 22 and / or to the cold store 13.
  • the amount of air is controlled by the fan 25.
  • the control device of the household cooling device 1 is configured, for example, to switch the fan 25 on and off as required on the basis of a target temperature of the interior 3 and on the basis of a measured or determined actual temperature of the interior 3.
  • the heat can be transferred directly to the evaporator 22 and thus to the refrigerant of the refrigeration cycle.
  • the household cooling device 21 is operated independently of the network, then the household cooling device 21 is not supplied with electrical energy from the energy supply network. Then the heat is transferred to the cold storage 13 and thus to the storage material 14, which thereby slowly thaws or heats up.
  • the relatively low electrical current requirement of the fan 25 and the control device can be covered by a rechargeable, relatively small rechargeable battery, which is not shown in any more detail, as a result of which a completely mains-independent operation of the household cooling device 21 with a relatively low power consumption from the rechargeable battery is possible over a certain period of time.

Description

Die Erfindung betrifft ein Kältegerät, insbesondere ein Haushaltskühlgerät, das einen Kältespeicher aufweist.The invention relates to a refrigerator, in particular a household refrigerator, which has a cold store.

Die DE 695 00 621 T2 offenbart ein Kühlmöbel mit einem Gefrierabteil, das mit einem weiteren Abteil kommuniziert. Das weitere Abteil weist einen Verdampfer zum Kühlen der Luft des Abteils auf. Dem Verdampfer ist ein Kältespeicher zugeordnet, der aus einer Batterie von Kältespeichern besteht, die ihrerseits durch einen Zwischenraum vom Verdampfer getrennt sowie in gegenseitigem Abstand angeordnet sind.The DE 695 00 621 T2 discloses a refrigerator with a freezer compartment that communicates with another compartment. The further compartment has an evaporator for cooling the air of the compartment. The evaporator is assigned a cold store, which consists of a battery of cold stores, which in turn are separated from the evaporator by an intermediate space and are arranged at a mutual distance.

Die US 4 928 501 A beschreibt einen rollbaren Kühlcontainer mit einem Kühlaufsatz, welcher an einer Oberseite des Kühlcontainers an zwei Öffnungen gekoppelt wird.The US 4,928,501A describes a rollable refrigerated container with a cooling attachment, which is coupled to two openings on an upper side of the refrigerated container.

Die JP S85 219379 A zeigt ein gattungsgemäßes Kältegerät mit einem Innenbehälter mit einem kühlbaren Innenraum zum Lagern von Kältegut, Ein Luftkanal ist über Öffnungen mit dem Innenraum gekoppelt. Innerhalb des Luftkanals ist ein Kältespeicher mit einem Speichermaterial angeordnet. In dem Luftkanal ist ein Verdampfer teilweise angeordnet. Das bekannte Kältegerät hat einen Ventilator, der einen Luftstrom durch den Luftkanal über den Verdampfer und den Kältespeicher und dann in den Innenraum leitet. Der Luftkanal und der kühlbare Innenraum sind durch eine wärmeisolierende Wand voneinander getrennt. Der Kältespeicher ist mit dem Verdampfer wärmeleitend verbunden.The JP S85 219379 A shows a generic refrigeration device with an inner container with a coolable interior for storing refrigerated goods, an air duct is coupled to the interior via openings. A cold store with a storage material is arranged within the air duct. An evaporator is partially arranged in the air duct. The known refrigeration device has a fan that directs an air flow through the air duct via the evaporator and the cold store and then into the interior. The air duct and the coolable interior are separated from each other by a heat-insulating wall. The cold store is connected to the evaporator in a heat-conducting manner.

Aufgabe der vorliegenden Erfindung ein ist es, ein verbessertes Kältegerät, insbesondere ein verbessertes Haushaltskühlgerät mit einem Kältespeicher anzugeben.The object of the present invention is to provide an improved refrigeration appliance, in particular an improved household refrigeration appliance with a cold store.

Die Aufgabe der Erfindung wird gelöst durch ein Kältegerät, aufweisend einen Innenbehälter mit einem kühlbaren Innenraum zum Lagern von Kältegut, einen über Öffnungen mit dem Innenraum gekoppelten Luftkanal, einen innerhalb des Luftkanals angeordneten Kältespeicher mit einem Speichermaterial, und einen Kältekreislauf mit einem im Luftkanal angeordneten Verdampfer, wobei der Luftkanal und der kühlbare Innenraum durch eine wärmeisolierende Wand voneinander getrennt sind.The object of the invention is achieved by a refrigeration device, comprising an inner container with a coolable interior for storing refrigerated goods, an air duct coupled via openings to the interior, a cold accumulator arranged within the air duct with a storage material, and one Refrigeration circuit with an evaporator arranged in the air duct, the air duct and the coolable interior being separated from one another by a heat-insulating wall.

Unter einem Kältegerät wird insbesondere ein Haushaltskältegerät verstanden, also ein Kältegerät das zur Haushaltsführung in Haushalten oder eventuell auch im Gastronomiebereich eingesetzt wird, und insbesondere dazu dient Lebensmittel und/oder Getränke in haushaltsüblichen Mengen bei bestimmten Temperaturen zu lagern, wie beispielsweise ein Kühlschrank, ein Gefrierschrank, eine Kühlgefrierkombination, eine Gefriertruhe oder ein Weinlagerschrank.A refrigeration device is understood in particular to be a household refrigeration device, i.e. a refrigeration device that is used for household management in households or possibly also in the catering sector, and in particular serves to store food and / or beverages in normal household quantities at certain temperatures, such as a refrigerator, a freezer , a fridge-freezer, a freezer or a wine storage cabinet.

Vorzugsweise ist das erfindungsgemäße Kältegerät ein Haushaltskühlgerät, so dass der kühlbare Innenraum als ein Kühlraum ausgebildet ist, dessen Soll-Temperatur oberhalb des Gefrierpunkts liegt. Das erfindungsgemäße Kältegerät umfasst demnach den kühlbaren Innenraum und den vom Innenraum getrennten Luftkanal, der über die Öffnungen mit dem Innenraum gekoppelt ist. Innerhalb des Luftkanals sind der Verdampfer und der Kältespeicher angeordnet, die vorgesehen sind, über die Öffnungen den kühlbaren Innenraum zu kühlen. Kältespeicher, die dem Fachmann im Prinzip bekannt sind, umfassen das Speichermaterial, z.B. ein sogenanntes PCM (phase change material), das vorgesehen ist, Kälte zu speichern. Geeignete Speichermaterialien sind beispielsweise Stoffe oder Stoffgemische, welche einen Schmelzpunkt (oder Phasenwechselpunkt) unterhalb der gewünschten Temperatur des kühlbaren Innenraums aufweisen. Geeignete Speichermaterialien sind z.B. Solelösungen mit einem Schmelzpunkt von beispielsweise <4°C im Falle eines Haushaltskältegerätes.The cooling device according to the invention is preferably a household cooling device, so that the coolable interior is designed as a cooling room, the desired temperature of which is above the freezing point. The refrigeration device according to the invention accordingly comprises the coolable interior and the air duct separated from the interior, which is coupled to the interior via the openings. Arranged within the air duct are the evaporator and the cold store, which are provided to cool the coolable interior space via the openings. Cold stores, known in principle to those skilled in the art, include the storage material, e.g. a so-called PCM (phase change material), which is intended to store cold. Suitable storage materials are, for example, substances or mixtures of substances which have a melting point (or phase change point) below the desired temperature of the coolable interior. Suitable storage materials are e.g. Brine solutions with a melting point of, for example, <4 ° C in the case of a household refrigerator.

Erfindungsgemäß sind der Luftkanal und der kühlbare Innenraum durch die wärmeisolierende Wand getrennt. Dadurch sind der Innenraum und der Luftkanal thermisch voneinander isoliert, wodurch eine verbesserte Temperatureinstellung oder Temperaturregelung des kühlbaren Innenraums ermöglicht wird. Dies ist besonders dann vorteilhaft, wenn es sich bei dem kühlbaren Innenraum um einen Kühlraum handelt, der auf Temperaturen oberhalb des Gefrierpunkts gekühlt wird.According to the air duct and the coolable interior are separated by the heat-insulating wall. As a result, the interior and the air duct are thermally insulated from one another, which enables improved temperature setting or temperature control of the coolable interior. This is particularly advantageous if the coolable interior is a cold room that is cooled to temperatures above freezing.

Um den Kältespeicher bzw. dessen Speichermaterial besonders schnell oder effizient zu kühlen, ist der Kältespeicher mit dem Verdampfer wärmeleitend verbunden ist.In order to cool the cold store or its storage material particularly quickly or efficiently, the cold store is connected to the evaporator in a heat-conducting manner.

Der Verdampfer ist als ein Lamellenverdampfer ausgeführt. Um die wärmeleitende Verbindung zwischen dem Lamellenverdampfer und dem Kältespeicher zu erhalten, ragen die Lamellen des als Lamellenverdampfer ausgebildeten Verdampfers in den Kältespeicher hinein.The evaporator is designed as a finned evaporator. In order to maintain the heat-conducting connection between the finned evaporator and the cold accumulator, the fins of the evaporator designed as a finned evaporator protrude into the cold accumulator.

Um den Innenraum besser zu kühlen, ist ein mittels einer Steuervorrichtung des erfindungsgemäßen Kältegerätes steuerbarer Ventilator vorgesehen, der eingerichtet ist, von dem Kältespeicher und von dem Verdampfer gekühlte Luft vom Luftkanal in den Innenraum zu blasen. Gegebenenfalls ist der Ventilator in der oberen Öffnung des Luftkanals oder zumindest im Bereich der oberen Öffnung des Luftkanals angeordnet, wenn der Luftkanal zumindest größtenteils vertikal verläuft.In order to cool the interior better, a fan which can be controlled by means of a control device of the refrigeration device according to the invention is provided and is designed to blow air cooled by the cold store and by the evaporator from the air duct into the interior. If appropriate, the fan is arranged in the upper opening of the air duct or at least in the region of the upper opening of the air duct if the air duct is at least largely vertical.

Die Temperatureinstellung bzw. Temperaturregelung des kühlbaren Innenraums kann dann besonders gut durchgeführt werden, wenn nach einer Variante des erfindungsgemäßen Kältegerätes die wärmeisolierende Wand derart ausgeführt ist, dass sie einen Wärmeübergang zwischen dem Luftkanal und dem kühlbaren Innenraum im Wesentlichen völlig verhindert.The temperature setting or temperature control of the coolable interior can be carried out particularly well if, according to a variant of the refrigeration device according to the invention, the heat-insulating wall is designed such that it essentially completely prevents heat transfer between the air duct and the coolable interior.

Der Luftkanal kann zumindest größtenteils vertikal verlaufen. Dann kann es vorgesehen sein, dass der Luftkanal an seinen beiden Enden mit einer der Öffnungen versehen ist.The air duct can run at least for the most part vertically. It can then be provided that the air duct is provided with one of the openings at both ends.

Je nach Ausführungsform des erfindungsgemäßen Kältegerätes wird demnach ein Haushaltskühlgerät mit einem PCM (phase change material) Tank bzw. allgemein Kältespeicher, dessen Speichermaterial insbesondere im eingefrorenen Zustand als Kälteakku dient, bereitgestellt. Der Kältespeicher ist mit dem Verdampfer, der Teil eines Kältekreislaufes des gegebenenfalls als Kühlgerät ausgeführten erfindungsgemäßen Kältegerätes thermisch gekoppelt ist. Als Kältekreislauf kann vorzugsweise ein Kaltdampfkompressionskreislauf verwendet werden. Der PCM-Tank bzw. der Kältespeicher ist vom Kühlgerätinnenraum (kühlbarer Innenraum) durch eine zusätzliche Dämmung bzw. durch die wärmeisolierende Wand getrennt, wodurch dieser gegebenenfalls weitgehend unabhängig von der Temperatur des Innenraums abgekühlt, gegebenenfalls eingefroren werden kann.Depending on the embodiment of the refrigeration device according to the invention, a household refrigeration device with a PCM (phase change material) tank or, in general, cold storage, the storage material of which, in particular in the frozen state, serves as a cold accumulator, is provided. The cold store is thermally coupled to the evaporator, which is part of a refrigeration cycle of the refrigeration device according to the invention, which may be designed as a cooling device. A cold vapor compression circuit can preferably be used as the cooling circuit. The PCM tank or the cold storage is from the interior of the refrigerator (coolable interior) separated by additional insulation or by the heat-insulating wall, which means that it can be cooled, possibly largely frozen, independently of the temperature of the interior.

Gegebenenfalls durch einen oder mehrere Ventilatoren kann die Luft des Innenraums insbesondere gezielt durch Luftleitkanäle über den Verdampfer und den PCM-Tank geleitet werden.If necessary, one or more fans can be used to direct the air in the interior, in particular in a targeted manner, through air guide channels via the evaporator and the PCM tank.

Als PCM-Material bzw. Speichermaterial können Stoffe oder Stoffgemische zum Einsatz kommen, welche einen Schmelzpunkt (oder Phasenwechselpunkt) unterhalb der gewünschten Innenraumtemperatur haben. Dies sind beispielsweise im Fall eines Haushaltskühlgerätes Solelösungen mit einem Schmelzpunkt von <4°C.Substances or mixtures of substances which have a melting point (or phase change point) below the desired interior temperature can be used as the PCM material or storage material. In the case of a household refrigerator, for example, these are brine solutions with a melting point of <4 ° C.

Die Regelung der Innenraumtemperatur im erfindungsgemäßen Kältegerät kann vorzugsweise über die Luftmenge erfolgen, welche über den Verdampfer und/oder den PCM-Tank (Kältespeicher) geleitet wird. Hierbei kann die Wärme von der Luft auf den Verdampfer und/oder auf den PCM-Tank übertragen werden.The regulation of the interior temperature in the refrigeration device according to the invention can preferably take place via the amount of air which is conducted via the evaporator and / or the PCM tank (cold storage). The heat can be transferred from the air to the evaporator and / or to the PCM tank.

Bei Netzbetrieb, d.h. wenn das erfindungsgemäße Kältegerät über ein elektrisches Versorgungsnetz mit elektrischer Energie versorgt wird, kann die Wärme direkt auf den Verdampfer und damit gegebenenfalls auf das Kältemittel des Kältekreislaufes übertragen werden. Bei netzunabhängigen Betrieb erfolgt eine Übeltragung der Wärme auf den PCM-Tank (allgemein: Kältespeicher) und damit auf das PCM-Material (allgemein: Speichermaterial), welches dadurch langsam auftaut bzw. sich erwärmt.With mains operation, i.e. if the refrigeration device according to the invention is supplied with electrical energy via an electrical supply network, the heat can be transferred directly to the evaporator and thus possibly to the refrigerant of the refrigeration cycle. In network-independent operation, the heat is transferred to the PCM tank (generally: cold storage) and thus to the PCM material (generally: storage material), which slowly thaws or heats up.

Der relativ geringe Strombedarf der gegebenenfalls vorhandenen Ventilatoren und der Steuerelektronik bzw. der Steuervorrichtung des erfindungsgemäßen Kältegerätes kann z.B. durch einen wieder aufladbaren Akku abgedeckt werden, wodurch ein vollständig netzunabhängiger Betrieb des erfindungsgemäßen Kältegerätes bei relativ geringen Stromverbrauch aus dem Akku über einen gewissen Zeitraum möglich ist.The relatively low power requirement of the fans, if any, and the control electronics or the control device of the refrigeration device according to the invention can be covered, for example, by a rechargeable battery, so that the refrigeration device according to the invention can be operated completely independently of the mains over a certain period of time with relatively low power consumption from the battery.

Das erfindungsgemäße Kältegerät erlaubt es, über einen längeren Zeitraum ohne Einschränkung oder zumindest jedoch ohne größere Einschränkungen des Benutzerverhaltens vollständig netzunabhängig betrieben zu werden. Das anschließende Wederabkühlen des PCM-Tanks bzw. des Speichermaterial des Kältespeichers erfolgt insbesondere automatisch während des Netzbetriebes.The refrigeration device according to the invention allows it to be operated completely independently of the network over a longer period of time without any restriction or at least without major restrictions in user behavior. The subsequent cooling down of the PCM tank or the storage material of the cold storage takes place in particular automatically during network operation.

Ausführungsbeispiele der Erfindung sind exemplarisch in den beigefügten schematischen Zeichnungen dargestellt. Es zeigen:

Fig. 1
ein nicht erfindungsgemäßes Haushaltskühlgerät in einer geschnittenen Darstellung und
Fig.2
ein erfindungsgemäßes Haushaltskühlgerät in einer geschnittenen Darstellung.
Exemplary embodiments of the invention are illustrated by way of example in the attached schematic drawings. Show it:
Fig. 1
a non-inventive household refrigerator in a sectional view and
Fig.2
an inventive household refrigerator in a sectional view.

Die Fig. 1 zeigt ein Haushaltskühlgerät 1 als Beispiel eines allerdings nicht erfindungsgemäßen Kältegerätes in einer geschnittenen Darstellung.The Fig. 1 shows a household refrigerator 1 as an example of a refrigerator not according to the invention in a sectional view.

Das Haushaltskühlgerät 1 weist einen Innenbehälter 2 mit einem kühlbaren Innenraum 3 auf. Der kühlbare Innenraum 3 ist vorgesehen, Kühlgut zu lagern. Am Innenbehälter 2 ist ein Türblatt 4 schwenkbar angeschlagen, damit der Innenraum 3 zugänglich ist.The household cooling device 1 has an inner container 2 with a coolable interior 3. The coolable interior 3 is intended to store refrigerated goods. A door leaf 4 is pivotally attached to the inner container 2 so that the interior 3 is accessible.

Im Falle des vorliegenden Ausführungsbeispiels ist im hinteren Teil des Innenbehälters 2 ein vom kühlbaren Innenraum 3 abgetrenntes Abteil bzw. ein abgetrennter Luftkanal 5 angeordnet, der im Falle des vorliegenden Ausführungsbeispiels durch die Rückwand 6 des Innenbehälters 3 und eine vertikal verlaufende Wand 7 begrenzt ist. Die Wand 7 umfasst ein wärmeisolierendes Material bzw. ist aus einem wärmeisolierenden Material gefertigt, sodass die Wand 7 einen Wärmeübergang im Wesentlichen vollständig verhindert.In the case of the present exemplary embodiment, a compartment or a separate air duct 5, which is separated from the coolable inner space 3, is arranged in the rear part of the inner container 2 and, in the case of the present exemplary embodiment, is delimited by the rear wall 6 of the inner container 3 and a vertically extending wall 7. The wall 7 comprises a heat-insulating material or is made of a heat-insulating material, so that the wall 7 essentially completely prevents heat transfer.

Der Luftkanal 5 verläuft im Falle des vorliegenden Ausführungsbeispiels im Wesentlichen über die gesamte Höhe des Innenraums 3. Er weist im oberen Bereich eine obere Öffnung 8 und im unteren Bereich eine untere Öffnung 9 auf, über die ein Luftaustausch zwischen dem Luftkanal 5 und dem kühlbaren Innenraum 3 ermöglicht wird.In the case of the present exemplary embodiment, the air duct 5 runs essentially over the entire height of the interior 3. It has an upper opening 8 in the upper region and a lower opening 9 in the lower region, via which an air exchange between the air duct 5 and the coolable interior 3 is made possible.

Innerhalb des Luftkanals 5 ist im Falle des vorliegenden Ausführungsbeispiels ein Verdampfer 10 angeordnet. Der Verdampfer 10 ist insbesondere als ein Plattenverdampfer ausgebildet und erstreckt sich insbesondere fast über die gesamte Höhe des Luftkanals 5. Der Verdampfer 10 ist Teil eines Kompressor-Kältekreislaufs, der neben dem Verdampfer 10 einen Verflüssiger 1 1 und einen Verdichter 12 umfasst. Der Kompressor-Kältekreislauf ist insbesondere als ein Kaltdampfkompressionskreislauf ausgeführt und wird mittels eines nicht näher dargestellten elektrischen Energieversorgungsnetzes mit elektrischer Energie versorgt.In the case of the present exemplary embodiment, an evaporator 10 is arranged within the air duct 5. The evaporator 10 is designed in particular as a plate evaporator and extends in particular almost over the entire height of the air duct 5. The evaporator 10 is part of a compressor refrigeration circuit which, in addition to the evaporator 10, comprises a condenser 11 and a compressor 12. The compressor refrigeration cycle is in particular designed as a cold vapor compression cycle and is supplied with electrical energy by means of an electrical energy supply network, not shown in detail.

Das Haushaltskühlgerät 1 umfasst ferner einen innerhalb des Luftkanals 5 angeordneten Kältespeicher 13, in dem ein Speichermaterial 14, ein sogenanntes PCM (phase change material) angeordnet ist. Ein solches Speichermaterial 14 ist dem Fachmann im Prinzip bekannt und ist vorgesehen, Kälte zu speichern. Als Speichermaterial 14 werden insbesondere Stoffe oder Stoffgemische verwendet, welche einen Schmelzpunkt (oder Phasenwechselpunkt) unterhalb der gewünschten Temperatur des kühlbaren Innenraums 3 aufweisen. Geeignete Speichermaterialien 14 sind z.B. Solelösungen mit einem Schmelzpunkt von <4°C.The household cooling device 1 further comprises a cold storage 13 arranged inside the air duct 5, in which a storage material 14, a so-called PCM (phase change material), is arranged. Such a storage material 14 is known in principle to the person skilled in the art and is intended to store cold. In particular, substances or mixtures of substances which have a melting point (or phase change point) below the desired temperature of the coolable interior 3 are used as the storage material 14. Suitable storage materials 14 are e.g. Brine solutions with a melting point of <4 ° C.

Im Falle des vorliegenden Ausführungsbeispiels ist der Kältespeicher 13 wärmeleitend mit dem Verdampfer 10 verbunden. Insbesondere berührt der Verdampfer 10 den Kältespeicher 13.In the case of the present exemplary embodiment, the cold store 13 is connected to the evaporator 10 in a heat-conducting manner. In particular, the evaporator 10 touches the cold store 13.

Der Kompressor-Kältekreislauf kann z.B. mit einer nicht näher dargestellten Steuervorrichtung des Haushaltskühlgeräts 1 verbunden sein, um bei Bedarf ein und ausgeschaltet zu werden, um das Speichermaterial 14 des Kältespeichers 13 zu kühlen. Im Falle des vorliegenden Ausführungsbeispiels weist das Haushaltskühlgerät 1 ferner einen insbesondere mit der Steuervorrichtung verbundenen Ventilator 15 auf, der eingerichtet ist, bei Bedarf einen Luftstrom über den Verdampfer 10 und/oder den Kältespeicher 13 zu leiten. Der Luftstrom wird insbesondere bei eingeschaltetem Ventilator 15 vom Innenraum 3 über die obere Öffnung 8 in den Luftkanal 5 und über die untere Öffnung 9 vom Luftkanal 5 in den Innenraum 3 geleitet. Der Luftstrom wird durch den Verdampfer 10 und/oder durch den Kältespeicher 13 gekühlt, wodurch der Innenraum 3 gekühlt wird.The compressor refrigeration circuit can be connected, for example, to a control device of the household cooling device 1, which is not shown in detail, in order to be switched on and off as required in order to cool the storage material 14 of the cold store 13. In the case of the present exemplary embodiment, the household cooling device 1 also has a fan 15, which is connected in particular to the control device and is designed to conduct an air flow over the evaporator 10 and / or the cold store 13 if necessary. The air flow is particularly from the interior 3 via the upper one when the fan 15 is switched on Opening 8 in the air duct 5 and passed through the lower opening 9 from the air duct 5 into the interior 3. The air flow is cooled by the evaporator 10 and / or by the cold store 13, as a result of which the interior 3 is cooled.

Im Betrieb des Haushaltskühlgerätes 1 erfolgt die Regelung bzw. Steuerung der Temperatur des kühlbaren Innenraums 3 über die Luftmenge, welche über den Verdampfer 10 und/oder den Kältespeicher 13 geleitet wird. Hierbei kann die Wärme von der Luft auf den Verdampfer 10 und/oder auf den Kältespeicher 13 übertragen werden. Die Luftmenge wird über den Ventilator 15 gesteuert. Die Steuervorrichtung des Haushaltskühlgerätes 1 ist dazu beispielsweise derart eingerichtet, den Ventilator 15 aufgrund einer Soll-Temperatur des Innenraums 3 und aufgrund einer gemessenen oder ermittelten Ist-Temperatur des Innenraums 3 bei Bedarf ein- und ausschaltet. Bei Netzbetrieb, d.h. wenn das Haushaltskühlgerät 1 vom elektrischen Energieversorgungsnetz mit elektrischer Energie versorgt wird, kann die Wärme direkt auf den Verdampfer 10 und damit auf das Kältemittel des Kältekreislaufes übertragen werden.In operation of the household cooling device 1, the temperature of the coolable interior 3 is regulated or controlled via the amount of air which is passed via the evaporator 10 and / or the cold store 13. Here, the heat can be transferred from the air to the evaporator 10 and / or to the cold store 13. The amount of air is controlled by the fan 15. For this purpose, the control device of the household cooling device 1 is configured, for example, to switch the fan 15 on and off as required on the basis of a target temperature of the interior 3 and on the basis of a measured or determined actual temperature of the interior 3. With mains operation, i.e. if the household cooling device 1 is supplied with electrical energy from the electrical power supply network, the heat can be transferred directly to the evaporator 10 and thus to the refrigerant of the refrigeration cycle.

Wird das Haushaltskühlgerät 1 netzunabhängig betrieben, dann wird das Haushaltskühlgerät 1 nicht mit elektrischer Energie aus dem Energieversorgungsnetz versorgt. Dann erfolgt eine Übertragung der Wärme auf den Kältespeicher 13 und damit auf das Speichermaterial 14, welches dadurch langsam auftaut bzw. sich erwärmt. Der relativ geringe elektrische Strombedarf des Ventilators 15 und der Steuervorrichtung kann durch einen nicht näher dargestellten, wieder aufladbaren, relativ kleinen Akku abgedeckt werden, wodurch ein vollständig netzunabhängiger Betrieb des Haushaltskühlgerätes 1 bei relativ geringem Stromverbrauch aus dem Akku über einen gewissen Zeitraum möglich ist.If the household cooling device 1 is operated independently of the network, then the household cooling device 1 is not supplied with electrical energy from the energy supply network. Then the heat is transferred to the cold storage 13 and thus to the storage material 14, which thereby slowly thaws or heats up. The relatively low electrical current requirement of the fan 15 and the control device can be covered by a rechargeable, relatively small rechargeable battery, which is not shown in any more detail, as a result of which a completely mains-independent operation of the household cooling device 1 with a relatively low power consumption from the rechargeable battery is possible over a certain period of time.

Die Fig. 2 zeigt ein weiteres Haushaltskühlgerät 21 als Beispiel eines erfindungsgemäßen Kältegerätes in einer geschnittenen Darstellung. Wenn nicht anders beschrieben, dann sind Bestandteile des in der Fig. 2 gezeigten Haushaltskühlgerätes 21, die mit Bestandteilen des in der Fig. 1 gezeigten Haushaltkältegerätes 1 im Wesentlichen bau- und funktionsgleich sind, mit denselben Bezugszeichen versehen.The Fig. 2 shows a further household refrigerator 21 as an example of a refrigerator according to the invention in a sectional view. Unless otherwise described, they are part of the Fig. 2 shown household refrigerator 21, which with components of the in Fig. 1 shown household refrigeration device 1 are essentially identical in construction and function, provided with the same reference numerals.

Das in der Fig. 2 gezeigte Haushaltskühlgerät 21 unterscheidet sich im Wesentlichen von dem in der Fig. 1 dargestellten Haushaltskühlgerät 1 dadurch, dass der Kältespeicher 13 in einem oberen Bereich des Innenbehälters 2 angeordnet ist und unterhalb des Kältespeichers 13 ein No-Frost Kühlaggregat bzw. dessen Verdampfer 22 angeordnet ist. Der Verdampfer 22 ist wärmeleitend mit dem Kältespeicher 13 verbunden. Der Verdampfer 22 ist als ein Lamellenverdampfer ausgebildet, dessen Lamellen in den Kältespeicher 13 hinein ragen.That in the Fig. 2 shown household refrigerator 21 differs substantially from that in the Fig. 1 Household cooling device 1 shown in that the cold storage 13 is arranged in an upper region of the inner container 2 and below the cold storage 13, a no-frost cooling unit or its evaporator 22 is arranged. The evaporator 22 is connected to the cold storage 13 in a heat-conducting manner. The evaporator 22 is designed as a finned vaporizer, the fins of which protrude into the cold accumulator 13.

Das No-Frost Kühlaggregat wird mittels eines nicht näher dargestellten elektrischen Energieversorgungsnetzes mit elektrischer Energie versorgt und ist mit einer nicht näher dargestellten Steuervorrichtung des Haushaltskühlgeräts 21 verbunden, um bei Bedarf ein und ausgeschaltet zu werden, um u.a. das Speichermaterial 14 des Kältespeichers 13 zu kühlen.The no-frost cooling unit is supplied with electrical energy by means of an electrical energy supply network (not shown in more detail) and is connected to a control device (not shown in more detail) of the household cooling device 21 in order to be switched on and off as required, in order, inter alia, to to cool the storage material 14 of the cold storage 13.

Das Haushaltskältegerät 21 umfasst ebenfalls ein im hinteren Teil des Innenbehälters 2 und vom kühlbaren Innenraum 3 abgetrenntes Abteil bzw. den Luftkanal 5, der im Falle des vorliegenden Ausführungsbeispiels durch die Rückwand 6 des Innenbehälters 3 und eine vertikal verlaufende Wand 7 begrenzt ist. Die Wand 7 umfasst ein wärmeisolierendes Material bzw. ist aus einem wärmeisolierenden Material gefertigt, sodass die Wand 7 einen Wärmeübergang im Wesentlichen vollständig verhindert.The household refrigeration device 21 likewise comprises a compartment or the air duct 5, which is separated in the rear part of the inner container 2 and from the coolable interior 3, which in the present exemplary embodiment is delimited by the rear wall 6 of the inner container 3 and a vertically extending wall 7. The wall 7 comprises a heat-insulating material or is made of a heat-insulating material, so that the wall 7 essentially completely prevents heat transfer.

Im Falle des vorliegenden Ausführungsbeispiels weist der Luftkanal 5 ein an die vertikal verlaufende Wand 7 anschließende horizontal verlaufende Wand 27 auf, die ebenfalls ein wärmeisolierendes Material umfasst bzw. aus einem wärmeisolierenden Material gefertigt ist, sodass die horizontal verlaufende Wand 27 ebenfalls einen Wärmeübergang im Wesentlichen vollständig verhindert. Der Verdampfer 22 liegt insbesondere auf der horizontal verlaufenden Wand 27 auf.In the case of the present exemplary embodiment, the air duct 5 has a horizontally running wall 27 which adjoins the vertically running wall 7 and which likewise comprises a heat-insulating material or is made of a heat-insulating material, so that the horizontally running wall 27 also essentially completely transfers heat prevented. The evaporator 22 lies in particular on the horizontally extending wall 27.

Der Luftkanal 5 weist im Falle des vorliegenden Ausführungsbeispiels im oberen Bereich eine obere Öffnung 28, im mittleren Bereich eine mittlere Öffnung 23 und im unteren Bereich eine untere Öffnung 29 auf, über die ein Luftaustausch zwischen dem Luftkanal 5 und dem kühlbaren Innenraum 3 ermöglicht wird.In the case of the present exemplary embodiment, the air duct 5 has an upper opening 28 in the upper region, a middle opening 23 in the middle region and a lower opening 29 in the lower region, via which an air exchange between the air duct 5 and the coolable interior space 3 is made possible.

Das Haushaltskühlgerät 21 weist ferner einen mit der Steuervorrichtung verbundenen Ventilator 25 auf, der eingerichtet ist, bei Bedarf einen Luftstrom über den Verdampfer 22 und/der den Kältespeicher 13 zu leiten. Der Luftstrom wird bei eingeschaltetem Ventilator 25 vom Innenraum 3 über die obere Öffnung 28 in den Luftkanal 5 und über die mittlere und untere Öffnungen 23, 29 vom Luftkanal 5 in den Innenraum 3 geleitet. Der Luftstrom wird durch den Verdampfer 22 und/oder durch den Kältespeicher 13 gekühlt, wodurch der Innenraum 3 gekühlt wird.The household cooling device 21 also has a fan 25 which is connected to the control device and which is set up to direct an air flow over the evaporator 22 and / or the cold store 13 if required. When the fan 25 is switched on, the air flow is conducted from the interior 3 via the upper opening 28 into the air duct 5 and via the middle and lower openings 23, 29 from the air duct 5 into the interior 3. The air flow is cooled by the evaporator 22 and / or by the cold store 13, as a result of which the interior 3 is cooled.

Im Betrieb des Haushaltskühlgerätes 1 erfolgt die Regelung bzw. Steuerung der Temperatur des kühlbaren Innenraums 3 über die Luftmenge, welche über den Verdampfer 22 und/oder den Kältespeicher 13 geleitet wird. Hierbei kann die Wärme von der Luft auf den Verdampfer 22 und/oder auf den Kältespeicher 13 übertragen werden. Die Luftmenge wird über den Ventilator 25 gesteuert. Die Steuervorrichtung des Haushaltskühlgerätes 1 ist dazu beispielsweise derart eingerichtet, den Ventilator 25 aufgrund einer Soll-Temperatur des Innenraums 3 und aufgrund einer gemessenen oder ermittelten Ist-Temperatur des Innenraums 3 bei Bedarf ein- und ausschaltet.In operation of the household cooling device 1, the temperature of the coolable interior 3 is regulated or controlled via the amount of air which is passed via the evaporator 22 and / or the cold store 13. Here, the heat can be transferred from the air to the evaporator 22 and / or to the cold store 13. The amount of air is controlled by the fan 25. For this purpose, the control device of the household cooling device 1 is configured, for example, to switch the fan 25 on and off as required on the basis of a target temperature of the interior 3 and on the basis of a measured or determined actual temperature of the interior 3.

Bei Netzbetrieb, d.h. wenn das Haushaltskühlgerät 21 von einem elektrischen Energieversorgungsnetz mit elektrischer Energie versorgt wird, kann die Wärme direkt auf den Verdampfer 22 und damit auf das Kältemittel des Kältekreislaufes übertragen werden.With mains operation, i.e. If the household cooling device 21 is supplied with electrical energy from an electrical power supply network, the heat can be transferred directly to the evaporator 22 and thus to the refrigerant of the refrigeration cycle.

Wird das Haushaltskühlgerät 21 netzunabhängig betrieben, dann wird das Haushaltskühlgerät 21 nicht mit elektrischer Energie aus dem Energieversorgungsnetz versorgt. Dann erfolgt eine Übertragung der Wärme auf den Kältespeicher 13 und damit auf das Speichermaterial 14, welches dadurch langsam auftaut bzw. sich erwärmt. Der relativ geringe elektrische Strombedarf des Ventilators 25 und der Steuervorrichtung kann durch einen nicht näher dargestellten, wieder aufladbaren, relativ kleinen Akku abgedeckt werden, wodurch ein vollständig netzunabhängiger Betrieb des Haushaltskühlgerätes 21 bei relativ geringem Stromverbrauch aus dem Akku über einen gewissen Zeitraum möglich ist.If the household cooling device 21 is operated independently of the network, then the household cooling device 21 is not supplied with electrical energy from the energy supply network. Then the heat is transferred to the cold storage 13 and thus to the storage material 14, which thereby slowly thaws or heats up. The relatively low electrical current requirement of the fan 25 and the control device can be covered by a rechargeable, relatively small rechargeable battery, which is not shown in any more detail, as a result of which a completely mains-independent operation of the household cooling device 21 with a relatively low power consumption from the rechargeable battery is possible over a certain period of time.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
HaushaltskühlgeratHaushaltskühlgerat
22
Innenbehälterinner container
33
Innenrauminner space
44
Türblattdoor leaf
55
Luftkanalair duct
66
Rückwandrear wall
77
Wandwall
8, 98, 9
Öffnungopening
1010
VerdampferEvaporator
1111
Verflüssigercondenser
1212
Verdichtercompressor
1313
Kältespeichercold storage
1414
Speichermaterialstorage material
1515
Ventilatorfan
2121
HaushaltskühlgerätHousehold refrigerator
2222
VerdampferEvaporator
2323
Öffnungopening
2525
Ventilatorfan
2727
Wandwall
28, 2928, 29
Öffnungopening

Claims (4)

  1. Refrigeration appliance, in particular a domestic refrigeration appliance, having an inner container (2) with a coolable interior (3) for storing items for refrigeration,
    having an air channel (5), which is coupled to the interior (3) via openings (23, 28, 29),
    having a cold accumulator (13) comprising an accumulator material (14), said cold accumulator being arranged within the air channel (5),
    having a refrigeration circuit with an evaporator (22), which is arranged in the air channel (5), and
    having a fan (25), which is connected to a control device of the refrigeration appliance (21) and is designed to direct, as required, an air stream through the air channel (5), via the evaporator (22) and the cold accumulator (13), and then into the interior (3),
    wherein the air channel (5) and the coolable interior (3) are separated from one another by a heat-insulating wall (27), and
    wherein the cold accumulator (13) is connected to the evaporator (10, 22) in a thermally conductive manner,
    characterized
    in that the evaporator (22) is designed in the form of a fin evaporator, of which the fins project into the cold accumulator (13).
  2. Refrigeration appliance according to Claim 1, characterized in that the heat-insulating wall (27) is designed such that it essentially completely prevents transfer of heat between the air channel (5) and the coolable interior (3).
  3. Refrigeration appliance according to Claim 1 or 2, characterized in that the air channel (5) runs vertically at least for the most part.
  4. Refrigeration appliance according to one of Claims 1 to 3, characterized in that it is designed in the form of a domestic refrigeration appliance (21) of which the coolable interior (3) is designed in the form of a cooling chamber of which the desired temperature is above freezing.
EP11757654.6A 2010-10-04 2011-09-20 Refrigerator with a cold accumulator Active EP2625477B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010041952A DE102010041952A1 (en) 2010-10-04 2010-10-04 Refrigerating appliance with a cold storage
PCT/EP2011/066276 WO2012045573A2 (en) 2010-10-04 2011-09-20 Refrigerator with a cold accumulator

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EP2625477A2 EP2625477A2 (en) 2013-08-14
EP2625477B1 true EP2625477B1 (en) 2020-02-12

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DE102010041952A1 (en) 2012-04-05
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WO2012045573A2 (en) 2012-04-12
WO2012045573A9 (en) 2013-07-18

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