EP2936022B1 - Vorrichtung zur kühlung von nahrungsmitteln - Google Patents

Vorrichtung zur kühlung von nahrungsmitteln Download PDF

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Publication number
EP2936022B1
EP2936022B1 EP13826969.1A EP13826969A EP2936022B1 EP 2936022 B1 EP2936022 B1 EP 2936022B1 EP 13826969 A EP13826969 A EP 13826969A EP 2936022 B1 EP2936022 B1 EP 2936022B1
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EP
European Patent Office
Prior art keywords
food
compartment
refrigeration
zone
heating resistance
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Active
Application number
EP13826969.1A
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English (en)
French (fr)
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EP2936022A1 (de
Inventor
Giorgio Sabatini
Giacomo QUAGLIA
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Whirlpool EMEA SpA
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Whirlpool EMEA SpA
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Publication of EP2936022A1 publication Critical patent/EP2936022A1/de
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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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/069—Cooling space dividing partitions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
    • 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
    • F25D31/00—Other cooling or freezing apparatus
    • F25D31/005—Combined cooling and heating devices
    • 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
    • F25D2400/02—Refrigerators including a heater
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/121—Sensors measuring the inside temperature of particular compartments

Definitions

  • the present invention relates to a refrigeration device for food products.
  • Refrigeration devices such as fridge-freezers are known.
  • a refrigeration device of food products that also allows you to perform the defrosting of the foods in an environment with a controlled temperature.
  • this cooling device includes a refrigeration compartment.
  • the refrigeration compartment includes a vertical back wall and rear of this wall is present a Peltier cell and a fan.
  • the Peltier cell extracts heat from the outside of the compartment and warms the inside of the compartment thanks to the help of the fan.
  • the fan indeed creates a fluid flow that invests the hot part of the Peltier cell causing then its entrance into the compartment.
  • the products present in the compartment are cooled by the introduction of refrigerated air.
  • JP2001 -043963 discloses a refrigeration device according to the preamble of claim 1.
  • Aim of the present invention is to overcome the above-mentioned drawbacks by providing a device for refrigeration of food products, which allows the maximum flexibility of operation.
  • the reference numeral 1 denotes a refrigeration device for food products.
  • the device 1 comprises a first compartment 2 for food refrigeration bounded by a bottom wall 21, an upper ceiling 22, a back wall 23, two side walls 24, 25, a movable opening and closing element 26.
  • the device 1 may comprise a drawer 5 that can be inserted and extracted from the first compartment 2 (in figure 1a the drawer has been removed for better pointing out portions behind).
  • the movable element 26 could be a front panel of the drawer 5.
  • the front panel performs therefore an airtight with the remaining portions of delimitation of the first compartment 2. In this case to access the first compartment 2 it is sufficient to pull the movable element 26.
  • the movable opening and closing element 26 may include a door.
  • the user before pulling out the drawer 5, may need to open the door.
  • the door is typically hinged around a vertical axis of rotation.
  • the device 1 comprises a second compartment 3 for refrigeration of food, stacked to the first compartment 2 of refrigeration.
  • the second compartment 3 is a freezer compartment.
  • the first compartment 2 overlaps the second compartment 3.
  • the second compartment 3 contains a pull-out drawer.
  • the device 1 also comprises an electrical heating resistor 9 formed in said bottom wall 21.
  • the bottom wall 21 preferably defines a partition, which separates the first and the second compartment 2, 3.
  • the bottom wall 21 could also display a plurality of layers and in particular could include one or more air gaps.
  • the bottom wall 21 comprises a first portion 212 not affected by said resistor 9 and arranged side by side horizontally to said resistor 9.
  • the vertical projection of said first portion 212 on a horizontal plane can entirely contain at least one imaginary square of size 15x15 centimeters.
  • the imaginary square has a size 25x25 centimeters.
  • the first compartment 2 comprises a region 27 for defrosting of foods that overlaps the resistor 9.
  • the first compartment 2 also comprises a region 28 for conservation of food in refrigerated environment that overlaps said imaginary square.
  • the area 27 for defrosting and the area 28 for conservation are arranged side by side.
  • the area 27 for defrosting develops from the movable opening and closing element 26 up to the back wall 23.
  • the zone 28 for conservation extends from the movable opening and closing element 26 up to the back wall 23.
  • the heating generated by the resistor 9 performs a localized action within said area 27 for defrosting.
  • the placement of the resistor 9 in the bottom wall 21 is very advantageous since in this way the resistor 9 is close to the food to defrost.
  • the heat that spontaneously moves up goes to affect the food to be unfrozen.
  • the parallelepiped comprising a first side that faces and contacts said movable opening and closing element 26. If it is defined an imaginary plane that is: vertical, orthogonal to the first face, parallel to a second and a third face of the parallelepiped. The distance between said imaginary vertical plane and said second face is equal to 60% of the distance between the second and the third face; the electrical heating resistor 9 is fully interposed between said imaginary vertical plane and the second face.
  • the device 1 comprises visual reference means that indicate which portion of the first compartment 2 will be affected by the area 27 for defrosting and which portion of the first compartment 2 will be affected by the area 28 for conservation.
  • these visual reference means could be placed in correspondence of the inlet opening of the first compartment 2.
  • the drawer 5 may comprise visual reference means that inform the user which portion of the drawer 5 will be introduced into region 27 for defrosting and which portion will be introduced into region 28 for conservation.
  • the visual reference means may be an adhesive or graphic signs produced by printing.
  • Figure 3 shows, for example, the resistor 9, which is located inside the bottom wall 21.
  • the bottom wall 21 comprises a thermally insulating coating.
  • This thermally insulating coating affects at least a zone below the resistor 9.
  • This thermally insulating coating for example is made of polystyrene. The thermally insulating coating makes it possible to prevent the heating, determined by the resistor 9, carries out an undesired heating effect in the second compartment 3.
  • the bottom wall 21 comprises an upper layer interposed between the resistor 9 and said first compartment 2. Conveniently, this top layer is made of plastic material. This arrangement prevents the user from accidentally coming into contact with the resistor 9 during the normal operation of the device 1. Resistor 9 is preferably embedded in the wall 21. The minimum distance between said resistor 9 and the first compartment 2 is less than 3 centimeters. In this way the resistor 9 can perform a localized heating in the desired area (the area 27 for defrosting).
  • the electrical resistor 9 has a planar development inside the bottom wall 21.
  • the electrical heating resistor 9 extends along a spiral line.
  • the spiral has a curvilinear shape.
  • the winding spiral of resistor 9 is given by a succession of straight sections which converge toward a central area.
  • resistor 9 comprises a first portion and a second portion 91, 92 which are parallel to each other and that extend along said spiral line.
  • the first and the second portion 91, 92 are joined at a central zone 93 of the spiral.
  • the resistor 9 extends along a twisting line e.g. sinusoidal.
  • the resistor 9 includes at least three concavities in one direction and three other concavities facing in the opposite direction.
  • the outer coil 90 of the spiral identifies advantageously an area larger than 1 ⁇ 4 of the vertical projection of the bottom wall 21 on a horizontal plane.
  • the outer coil 90 of the spiral identifies an area greater than 200 cm 2 .
  • the outer coil 90 of the spiral identifies an area less than 600 cm 2 .
  • this allows to identify an area sufficient to accommodate a plate or a small baking pan (which could therefore contain the food to defrost).
  • the device 1 comprises a temperature sensor placed in the first compartment 2.
  • this temperature sensor 6 is placed in the zone 27 of defrosting.
  • the temperature sensor 6 is located above the drawer 5 when the latter is completely inserted into the first compartment 2.
  • the sensor 6 is placed in correspondence of the upper ceiling 22.
  • the device 1 comprises thermoregulation means 7 operatively connected to the temperature sensor 6 and which implement corrective actions of stabilization of the temperature detected by the sensor 6 to a preset temperature value.
  • thermoregulation means 7 comprise the resistor 9 stated above.
  • the thermoregulation means 7 also comprise control means that compare the value detected by the sensor with a range of values containing said temperature preset value. This range of values includes an upper and a lower limit. At the detection by the sensor 6 of the reaching the lower limit of the interval the control means activate the resistor 9. Upon reaching the upper limit of this range of values the control means deactivates the resistor 9. In the preferred solution this predetermined interval of values is between 0 °C and 4 °C.
  • the thermoregulation means 7 comprise at least one first port 70 for the introduction of a refrigerant fluid in the first compartment 2. If necessary the control means could activate the introduction of the refrigerant fluid through the first introduction port 70.
  • the port 70 is formed on the back wall 23.
  • the first port 70 introduces the refrigerant fluid in the first compartment 2 directing it toward the movable opening and closing element 26.
  • the first port 70 is advantageously located above the maximum size defined by the draw 5 when the latter is placed in the first compartment 2.
  • the device 1 comprises a second port 71 that introduces the refrigerant fluid in the first compartment 2.
  • the first and the second ports 70, 71 are arranged side by side.
  • the bottom wall 21 provides at least one way that put in fluid communication the first and the second compartment 2, 3. This passage for example enables the outflow from the first compartment 2 of refrigerant fluid introduced through the first and/or the second port 70, 71.
  • the device 1 may comprise a selector which can be operated by the user that switches operation of thermoregulation means 7 between at least one plurality of operating modes, each operating mode being associated with a respective different conservation conditions of food products contained in the first compartment 2.
  • the plurality of operating modes comprises, for example, a first operating mode in which the conservation condition corresponds to a preset temperature value greater than or equal to -1 °C, and less than or equal to +3 °C (the first compartment 2 thus behaves like "Chiller" compartment).
  • the plurality of operating modes may comprise a second operating mode; in the second operating mode the conservation condition corresponding to a preset temperature value greater than or equal to -35 °C and less than or equal to -15 °C (in this case, the first compartment 2 implements a function of fast cooling).
  • the plurality of operating modes comprises, for example, a third operating mode; in the third operating mode the conservation condition corresponds to a preset temperature value between +3 and +6 °C.
  • first operating mode the second operating mode
  • third operating mode the numeral adjective is used only to distinguish from one another the various operating modes.
  • the possibility to implement an operating mode identified by the numeral adjective of greater degree does not necessarily imply the possibility of implementing the operating mode identified by the numeral adjective of minor degree.
  • the device 1 comprises a third compartment 4 for refrigeration of food products stacked with the first and the second compartment 2, 3 for refrigeration.
  • the third compartment 4 of refrigeration overlaps the first compartment 2.
  • the third compartment 4 is a refrigerator compartment which maintains a conservation temperature above 0 °C (typically from 3 °C to 6 °C).
  • the first compartment 2 for refrigeration is therefore interposed between the second and the third compartment 3, 4 for refrigeration.
  • the third compartment 4 is a compartment with a door with two shutters.
  • the present invention allows to achieve multiple benefits. First of all, it allows you to use the same compartment to perform at the same time a fast and effective defrosting of food products and even the low-temperature conservation of other food products.
  • the device according to the present invention also allows you to have a "Jolly" compartment that where necessary may be used or as freezer or as refrigerator. This therefore allows to expand the capacity of the freezer compartment and the refrigerator compartment present in the same device 1.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)

Claims (10)

  1. Kühlungsvorrichtung (1) für Nahrungsmittelprodukte, umfassend:
    - ein erstes Nahrungsmittelkühlfach (2), das von einer unteren Wand (21), einer oberen Decke (22), einer Rückwand (23), zwei Seitenwänden (24, 25), einer beweglichen Öffnung und einem Schließelement (26) begrenzt ist;
    - ein zweites Nahrungsmittelkühlfach (3), das über dem ersten Kühlfach (2) gestapelt ist;
    - einen elektrischen Heizwiderstand (9), der in der unteren Wand (21) bereitgestellt ist;
    wobei die untere Wand (21) einen ersten Abschnitt (212) umfasst, der von dem elektrischen Heizwiderstand (9) nicht berührt wird und horizontal zu dem elektrischen Heizwiderstand (9) seitlich steht;
    dadurch gekennzeichnet, dass ein vertikaler Vorsprung des ersten Abschnitts (212) auf einer horizontalen Ebene mindestens ein imaginäres Quadrat mit der Abmessung 15 x 15 Zentimeter vollständig beinhaltet; wobei das erste Nahrungsmittelkühlfach (2) eine Nahrungsmittelauftauzone (27) umfasst, die mindestens teilweise den elektrischen Heizwiderstand (9) überdeckt, und eine Zone (28) für die Nahrungsmittelkonservierung in einer gekühlten Umgebung, die mindestens teilweise das imaginäre Quadrat überdeckt; wobei die Auftauzone (27) und die Zone (28) zur Nahrungsmittelkonservierung seitlich stehen;
    wobei die Kühlungsvorrichtung (1) visuelle Referenzmittel umfasst, die anzeigen, welcher Abschnitt des ersten Nahrungsmittelkühlfachs (2) von der Nahrungsmittelauftauzone (27) und welcher Abschnitt des ersten Nahrungsmittelkühlfachs (2) von der Konservierungszone (28) betroffen ist.
  2. Kühlungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie ein drittes Nahrungsmittelproduktekühlfach (4) umfasst, das über dem ersten und dem zweiten Kühlfach (2, 3) gestapelt ist; wobei das erste Kühlfach (2) zwischen dem zweiten und dem dritten Kühlfach (3, 4) eingesetzt ist; wobei das dritte Kühlfach (4) Nahrungsmittelprodukte bei einer Temperatur konserviert, die höher ist als 0 °C, und das zweite Kühlfach (3) ein Tiefkühlfach ist.
  3. Kühlungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sie eine Schublade (5) umfasst, die in das erste Nahrungsmittelkühlfach (2) eingesetzt und daraus herausgenommen werden kann; wobei die Schublade (5), wenn sie vollständig in das erste Fach (2) eingesetzt ist, mindestens teilweise den ersten Abschnitt (212) und den elektrischen Heizwiderstand (9) überdeckt.
  4. Kühlungsvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass sich der elektrische Heizwiderstand (9) in einer Spirale windet.
  5. Kühlungsvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die am weitesten außen gelegene Windung (90) des elektrischen Widerstands (9), der in einer Spirale gewunden ist, eine Fläche identifiziert, die um ¼ größer ist als die Fläche des vertikalen Vorsprungs der unteren Wand (21) auf der horizontalen Ebene.
  6. Kühlungsvorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Spiralwindung des elektrischen Heizwiderstands (9) durch eine Abfolge von geraden Strecken, die in einer zentralen Zone zusammenlaufen, vorgegeben ist.
  7. Kühlungsvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass sie umfasst:
    - einen Temperatursensor (6), der in der Nahrungsmittelauftauzone (27) positioniert ist;
    - Wärmeregulierungsmittel (7), die betriebsfähig mit dem Temperatursensor (6) verbunden sind und Korrekturmaßnahen umsetzen, um die vom Sensor (6) erfasste Temperatur um einen voreingestellten Temperaturwert herum zu stabilisieren; wobei die Wärmeregulierungsmittel (7) den elektrischem Heizwiderstand (9) umfassen.
  8. Kühlungsvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass sie einen benutzergesteuerten Schalter umfasst, der die Funktion des Wärmeregulierungssystems (7) zwischen mindestens einer ersten, einer zweiten und einer dritten Betriebsart umschaltet, wobei jede Betriebsart einer jeweils unterschiedlichen Konservierungsbedingung der im ersten Nahrungsmittelkühlfach (2) enthaltenen Nahrungsmittelprodukte zugeordnet ist; wobei der voreingestellte Temperaturwert in der ersten Betriebsart höher oder gleich -1°C und niedriger oder gleich +3 °C ist; wobei der voreingestellte Temperaturwert in der zweiten Betriebsart höher oder gleich -35 °C und niedriger oder gleich -15 °C ist; wobei der voreingestellte Temperaturwert in der dritten Betriebsart zwischen +3 und +6 °C beträgt.
  9. Kühlungsvorrichtung nach einem der vorstehenden Ansprüche; wobei das kleines imaginäre Parallelepipedon, das die Kühlungsvorrichtung integriert, definiert ist; wobei das Parallelepipedon eine erste Seite umfasst, die zu der beweglichen Öffnung und dem Schließelement (26) zeigt; wobei eine imaginäre Oberfläche definiert ist, die vertikal, orthogonal zu der ersten Seite, parallel zu einer zweiten und einer dritten Seite des Parallelepipedons ist; wobei der Abstand zwischen der imaginären vertikalen Ebene und der zweiten Seite gleich 60 % des Anstands zwischen der zweiten und der dritten Seite ist; wobei der elektrische Heizwiderstand (9) vollständig zwischen der imaginären vertikalen Ebene und der zweite Seite eingesetzt ist.
  10. Verfahren zum Verwenden der Kühlungsvorrichtung (1) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass es folgende Schritte umfasst:
    - Legen eines ersten Nahrungsmittels, das aufgetaut werden muss, in die Nahrungsmittelauftauzone (27);
    - Legen eines zweiten, nicht tiefgefrorenen, zu kühlenden Nahrungsmittels in die Konservierungszone (28);
    - Auftauen des ersten Nahrungsmittels, wobei der Schritt des Auftauens des Nahrungsmittels den Schritt des Aktivierens des elektrischen Heizwiderstands (9) umfasst.
EP13826969.1A 2012-12-20 2013-12-20 Vorrichtung zur kühlung von nahrungsmitteln Active EP2936022B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000086A ITPR20120086A1 (it) 2012-12-20 2012-12-20 Dispositivo di refrigerazione di prodotti alimentari.
PCT/IB2013/061173 WO2014097230A1 (en) 2012-12-20 2013-12-20 Device for refrigeration of food products

Publications (2)

Publication Number Publication Date
EP2936022A1 EP2936022A1 (de) 2015-10-28
EP2936022B1 true EP2936022B1 (de) 2020-08-05

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EP13826969.1A Active EP2936022B1 (de) 2012-12-20 2013-12-20 Vorrichtung zur kühlung von nahrungsmitteln

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EP (1) EP2936022B1 (de)
IT (1) ITPR20120086A1 (de)
WO (1) WO2014097230A1 (de)

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KR20200105267A (ko) * 2019-02-28 2020-09-07 엘지전자 주식회사 냉장고의 제어 방법

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Publication number Priority date Publication date Assignee Title
JP2001043963A (ja) * 1999-07-30 2001-02-16 Mitsubishi Electric Corp 冷蔵庫
US7971443B2 (en) * 2004-10-28 2011-07-05 Sharp Kabushiki Kaisha Refrigerator
KR20110035032A (ko) * 2009-09-29 2011-04-06 엘지전자 주식회사 냉장고 및 그 운전 방법

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* Cited by examiner, † Cited by third party
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None *

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Publication number Publication date
ITPR20120086A1 (it) 2014-06-21
EP2936022A1 (de) 2015-10-28
WO2014097230A1 (en) 2014-06-26

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