EP3037749B1 - Household appliance for refrigerating foodstuffs - Google Patents

Household appliance for refrigerating foodstuffs Download PDF

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Publication number
EP3037749B1
EP3037749B1 EP15199860.6A EP15199860A EP3037749B1 EP 3037749 B1 EP3037749 B1 EP 3037749B1 EP 15199860 A EP15199860 A EP 15199860A EP 3037749 B1 EP3037749 B1 EP 3037749B1
Authority
EP
European Patent Office
Prior art keywords
box
rear wall
deflector
drawer
electrical appliance
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.)
Active
Application number
EP15199860.6A
Other languages
German (de)
French (fr)
Other versions
EP3037749A1 (en
Inventor
Pawel SOBCZAK
Daniele Angeletti
Andrea Valeri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Whirlpool EMEA SpA
Original Assignee
Whirlpool EMEA SpA
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Publication date
Application filed by Whirlpool EMEA SpA filed Critical Whirlpool EMEA SpA
Publication of EP3037749A1 publication Critical patent/EP3037749A1/en
Application granted granted Critical
Publication of EP3037749B1 publication Critical patent/EP3037749B1/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
    • 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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/024—Slidable shelves
    • F25D25/025—Drawers
    • 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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection

Definitions

  • the present invention relates to a household appliance for refrigerating foodstuffs, such as for example a refrigerator or a refrigerator-freezer.
  • a household appliance for refrigerating foodstuffs such as for example a refrigerator or a refrigerator-freezer.
  • Combined "no frost" refrigerators are known in which the cold air generated by the evaporator of the freezer is set in forced circulation and also used for cooling the refrigerator compartment.
  • Partial no-frost refrigerator-freezers are also known, comprising:
  • EP2650630A2 discloses a household electrical appliance according to the preamble of claim 1.
  • the technical task underpinning the present invention is to provide a household refrigeration appliance and a method that obviate the drawbacks of the above-cited prior art.
  • an object of the present invention is to provide a method and a household refrigeration device which enable maximum use flexibility by users.
  • a further aim of the present invention is to optimize the efficiency of a household refrigeration appliance, enabling optimal conservation of particular types of products.
  • the technical task set and the objects specified are substantially attained by a method and a food refrigeration appliance, comprising the technical characteristics as set out in one or more of the accompanying claims.
  • reference number 1 denotes a food refrigeration appliance.
  • This household electrical appliance 1 typically comprises a refrigerator or in any case a refrigerator-freezer.
  • the household electrical appliance 1 comprises a partial no-frost refrigerator-freezer. In this case the cold air used for cooling the freezer is not used for cooling the refrigerator.
  • the household electrical appliance 1 comprises a compartment 2 for conserving the foodstuffs.
  • the compartment 2 is delimited by at least:
  • the compartment 2 is also delimited by two lateral walls 23, 24 that extend between the hatch door in the closed position and the rear wall 22.
  • compartment 2 there is a lower base (which usually divides the compartment 2 from the freezer) and an upper ceiling.
  • the household appliance 1 further comprises cooling means 3 of said rear wall 22.
  • the cooling means 3 are at least partly located externally of the compartment 2 behind the rear wall 22.
  • the household electrical appliance 1 further comprises a box 4 for housing a part of the foodstuffs located in the compartment 2.
  • the box 4 is located internally of the compartment 2.
  • the box 4 is positionable in a first and a second position. This box 4 is destined for conservation of foodstuffs. In said first position the box 4 is located higher than in the second position.
  • the box 4 comprises an intercepting deflector 40 of an air current which flows downwards by natural convection along the rear wall 22.
  • the deflector 40 heads said rear wall 22 and defines a deflector 40 for inlet of said air current into the box 4.
  • the deflector 40 advantageously comprises at least a fin which projects from the box 4 towards the rear wall.
  • the deflector 40 develops transversally of a surface of the box 4 which faces said rear wall 22 and which is advantageously substantially vertical.
  • the deflector 40 distances along a horizontal direction from said surface facing the rear wall 22.
  • the box 4 advantageously comprises a single deflector 40 which extends continuously.
  • the deflector 40 adapts to the geometry of the rear wall 22.
  • the deflector 40 embraces a central column 5 which in a total no-frost solution would comprise outlet mouths of the cooled air from the evaporator of the freezer.
  • the box 4 defines a chiller; in the second position it defines a vegetable tray.
  • the box 4 surmounts an underlying vegetable tray (not illustrated, and the position of which is not height-adjustable and in which the average temperature is appropriately about 6°C; the vegetable tray is usually positioned in a zone defined by reference numeral 20).
  • the average temperature inside the box is lower than in the second position.
  • the average internal temperature of the box 4 in the second position is greater by more than 1 degree Celsius with respect to the average internal temperature of the box 4 in the first position.
  • the average internal temperature of the box 4 is comprised between -2 and 3°C, while in the second position the average internal temperature of the box 4 is about 4°C.
  • the precision in the regulation of the internal temperature of the box 4 is about 1°C.
  • the cooling means 3 advantageously comprise an evaporator plate which extends externally of the compartment 2 and behind said rear wall 22 (the means 3 are schematised by the broken line in figure 1 ).
  • the localised cooling induced by said evaporating plate (or a like cooling system) at the rear wall 22 generate the air current which descends by natural convection along the rear wall 22.
  • the box 4 In the first and the second position the box 4 is inserted respectively in first and second positioning guides located along said lateral walls 23, 24.
  • the deflector 40 When the box 4 is completely inserted in said first or second positioning guides the deflector 40 is advantageously located at a minimum distance from said rear wall 22 of lower than 5 millimetres, preferably lower than 4 millimetres.
  • the box 4 comprises an extractable drawer 41.
  • the box 41 comprise the deflector 40. During an extraction run thereof the box 41 slides along said first and second positioning guides.
  • the box 41 and the positioning guides define, in combination, a stop of the extraction run of the box 41 from the compartment 2 (in order to completely extract the box 41 the user must perform specific additional manoeuvres).
  • the box 4 further comprises a frontal flap 42 which when the box is closed contributes to delimiting said box.
  • An extraction stroke of the drawer 41 determines an opening of said frontal flap 42 both in a case in which said box 4 is in the first position and in a case in which the box 4 is in the second position.
  • the frontal flap 42 rotates about a rotation axis 420 which remains stationary during the extraction stroke of the drawer 41.
  • the axis 420 is substantially horizontal.
  • the drawer 41 comprises an arch 43 located in contact with a cam 44 fashioned in said flap 42 for transforming a translating motion of the drawer 41 into a rotary motion of the flap 42.
  • the arch 43 advantageously identifies a concavity facing downwards.
  • the cam 44 is advantageously defined by a rounded projection solidly constrained to remaining parts of the flap 42.
  • the box 4 comprises a ceiling 45 which surmounts the closed drawer and remains fixed during the extraction run of the drawer.
  • the rotation axis 420 of the flap 42 develops parallel to and at a side of the perimeter of the ceiling 45.
  • the box 4 (in particular the drawer 41) comprises a rear inlet opening 46 for said air current.
  • the rear opening 46 is inferiorly delimited by said deflector 40.
  • the opening 46 involves a surface of greater than 50 cm 2 .
  • the deflector 40 has a length of greater than 25% of the width extension of the box 4.
  • the expression "width extension” relates to the development of the box 4 along a perpendicular direction to the lateral walls which delimit the compartment 2.
  • An object of the present invention is also a method for conserving foodstuffs in a household refrigeration appliance.
  • This household appliance advantageously has one or more of the characteristics described herein above.
  • the method comprises the steps of:
  • the present invention has multiple advantages. Firstly it enables exploiting an air current generated by natural convection in order to improve the conservation of certain types of food products.
  • the products can be placed in the box 4 in which a specific microclimate can be created that can be modified by regulating the height at which said box 4 is positioned internally of the compartment.
  • the invention as it is conceived is susceptible to numerous modifications and variants, all falling within the scope of the inventive concept characterized thereby.
  • the materials used, as well as the dimensions may in practice be of any type, according to needs. In practice, all the materials used, as well as the dimensions, can be any according to requirements.

Landscapes

  • 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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Description

  • The present invention relates to a household appliance for refrigerating foodstuffs, such as for example a refrigerator or a refrigerator-freezer. Combined "no frost" refrigerators are known in which the cold air generated by the evaporator of the freezer is set in forced circulation and also used for cooling the refrigerator compartment.
  • Partial no-frost refrigerator-freezers are also known, comprising:
    • a freezer compartment in which a no-frost technology is used, and a dedicated evaporator;
    • a refrigerator compartment in which the subtraction of heat is done using an evaporating plate that is additional with respect to the evaporator used for cooling the freezer compartment.
  • EP2650630A2 discloses a household electrical appliance according to the preamble of claim 1.
  • In this context, the technical task underpinning the present invention is to provide a household refrigeration appliance and a method that obviate the drawbacks of the above-cited prior art.
  • In particular, an object of the present invention is to provide a method and a household refrigeration device which enable maximum use flexibility by users. A further aim of the present invention is to optimize the efficiency of a household refrigeration appliance, enabling optimal conservation of particular types of products. The technical task set and the objects specified are substantially attained by a method and a food refrigeration appliance, comprising the technical characteristics as set out in one or more of the accompanying claims.
  • Additional features and advantages of the present invention will become more apparent from the approximate, and hence non-limiting, description of a preferred but not exclusive embodiment of a household appliance and a method for refrigerating food products. In particular, in the appended drawings:
    • figure 1 shows a perspective view of a household electrical appliance according to the present invention, with some parts removed better to evidence others;
    • figure 2 shows a detail of figure 1, with further parts removed;
    • figures 3 and 4 show a detail of the electrical appliance of figure 1;
    • figure 5 shows a sectional view of a detail of the food refrigeration appliance of figure 1;
  • In the accompanying figures, reference number 1 denotes a food refrigeration appliance.
  • This household electrical appliance 1 typically comprises a refrigerator or in any case a refrigerator-freezer. In particular the household electrical appliance 1 comprises a partial no-frost refrigerator-freezer. In this case the cold air used for cooling the freezer is not used for cooling the refrigerator. The household electrical appliance 1 comprises a compartment 2 for conserving the foodstuffs.
  • The compartment 2 is delimited by at least:
    • a front access hatch door to the compartment 2 (in figures 1 and 2 the hatch has been removed; in the closed position it is however destined to occlude a frontal opening for access to the compartment 2);
    • a rear wall 22 opposite the hatch door when the hatch door is in a closed position;
  • The compartment 2 is also delimited by two lateral walls 23, 24 that extend between the hatch door in the closed position and the rear wall 22.
  • Lastly to complete the delimitation of the compartment 2 there is a lower base (which usually divides the compartment 2 from the freezer) and an upper ceiling.
  • The household appliance 1 further comprises cooling means 3 of said rear wall 22. The cooling means 3 are at least partly located externally of the compartment 2 behind the rear wall 22.
  • The household electrical appliance 1 further comprises a box 4 for housing a part of the foodstuffs located in the compartment 2. The box 4 is located internally of the compartment 2. The box 4 is positionable in a first and a second position. This box 4 is destined for conservation of foodstuffs. In said first position the box 4 is located higher than in the second position. The box 4 comprises an intercepting deflector 40 of an air current which flows downwards by natural convection along the rear wall 22. The deflector 40 heads said rear wall 22 and defines a deflector 40 for inlet of said air current into the box 4.
  • The deflector 40 advantageously comprises at least a fin which projects from the box 4 towards the rear wall. The deflector 40 develops transversally of a surface of the box 4 which faces said rear wall 22 and which is advantageously substantially vertical. By way of example the deflector 40 distances along a horizontal direction from said surface facing the rear wall 22.
  • The box 4 advantageously comprises a single deflector 40 which extends continuously.
  • The deflector 40 adapts to the geometry of the rear wall 22. In the solution according to the invention illustrated in the figures the deflector 40 embraces a central column 5 which in a total no-frost solution would comprise outlet mouths of the cooled air from the evaporator of the freezer. In the first position the box 4 defines a chiller; in the second position it defines a vegetable tray. In both the first and the second position the box 4 surmounts an underlying vegetable tray (not illustrated, and the position of which is not height-adjustable and in which the average temperature is appropriately about 6°C; the vegetable tray is usually positioned in a zone defined by reference numeral 20). In the first position the average temperature inside the box is lower than in the second position. The average internal temperature of the box 4 in the second position is greater by more than 1 degree Celsius with respect to the average internal temperature of the box 4 in the first position.
  • In particular in the first position the average internal temperature of the box 4 is comprised between -2 and 3°C, while in the second position the average internal temperature of the box 4 is about 4°C. The precision in the regulation of the internal temperature of the box 4 is about 1°C.
  • The cooling means 3 advantageously comprise an evaporator plate which extends externally of the compartment 2 and behind said rear wall 22 (the means 3 are schematised by the broken line in figure 1). The localised cooling induced by said evaporating plate (or a like cooling system) at the rear wall 22 generate the air current which descends by natural convection along the rear wall 22.
  • In the first and the second position the box 4 is inserted respectively in first and second positioning guides located along said lateral walls 23, 24. When the box 4 is completely inserted in said first or second positioning guides the deflector 40 is advantageously located at a minimum distance from said rear wall 22 of lower than 5 millimetres, preferably lower than 4 millimetres. The box 4 comprises an extractable drawer 41. The box 41 comprise the deflector 40. During an extraction run thereof the box 41 slides along said first and second positioning guides. The box 41 and the positioning guides define, in combination, a stop of the extraction run of the box 41 from the compartment 2 (in order to completely extract the box 41 the user must perform specific additional manoeuvres).
  • The box 4 further comprises a frontal flap 42 which when the box is closed contributes to delimiting said box.
  • An extraction stroke of the drawer 41 determines an opening of said frontal flap 42 both in a case in which said box 4 is in the first position and in a case in which the box 4 is in the second position.
  • The frontal flap 42 rotates about a rotation axis 420 which remains stationary during the extraction stroke of the drawer 41. The axis 420 is substantially horizontal.
  • In this regard the drawer 41 comprises an arch 43 located in contact with a cam 44 fashioned in said flap 42 for transforming a translating motion of the drawer 41 into a rotary motion of the flap 42. The arch 43 advantageously identifies a concavity facing downwards. The cam 44 is advantageously defined by a rounded projection solidly constrained to remaining parts of the flap 42.
  • As shown by way of example in figure 3 or 4, the box 4 comprises a ceiling 45 which surmounts the closed drawer and remains fixed during the extraction run of the drawer. The rotation axis 420 of the flap 42 develops parallel to and at a side of the perimeter of the ceiling 45.
  • According to the invention, the box 4 (in particular the drawer 41) comprises a rear inlet opening 46 for said air current. The rear opening 46 is inferiorly delimited by said deflector 40. The opening 46 involves a surface of greater than 50 cm2. The deflector 40 has a length of greater than 25% of the width extension of the box 4. The expression "width extension" relates to the development of the box 4 along a perpendicular direction to the lateral walls which delimit the compartment 2.
  • An object of the present invention is also a method for conserving foodstuffs in a household refrigeration appliance. This household appliance advantageously has one or more of the characteristics described herein above.
  • The method comprises the steps of:
    • providing the household refrigeration appliance according to claims 1-10;
    • cooling the rear wall 22 by means of said cooling means 3;
    • generating a cold air current which flows down along the rear wall 22 by natural convection;
    • intercepting at least a part of said cold air current by means of said deflector 40 and deviating it at least partly inside the box 4 for refrigerating the inside of the box 4. In this way an effective cooling of the foodstuffs located in the box can be carried out. Further, according to the height at which the box is positioned in the compartment 2, the average temperature inside the box 4 can also be regulated.
  • The present invention has multiple advantages. Firstly it enables exploiting an air current generated by natural convection in order to improve the conservation of certain types of food products. The products can be placed in the box 4 in which a specific microclimate can be created that can be modified by regulating the height at which said box 4 is positioned internally of the compartment.
  • The invention as it is conceived is susceptible to numerous modifications and variants, all falling within the scope of the inventive concept characterized thereby. The materials used, as well as the dimensions, may in practice be of any type, according to needs. In practice, all the materials used, as well as the dimensions, can be any according to requirements.

Claims (11)

  1. A household electrical appliance being a refrigerator for foodstuffs, comprising:
    - a compartment (2) for conserving foodstuffs, delimited at least by a front door for access to the compartment (2) and a rear wall (22) opposite the door in a closed position;
    - cooling means (3) of said rear wall (22) located externally of the compartment (2) behind said rear wall (22); and
    - a box (4) in which a part of the foodstuffs located in the compartment (2) is placed;
    wherein said box (4) comprises an intercepting deflector (40) of an air current which flows down by natural convection along the rear wall (22), said deflector (40) comprising at least a fin projecting from the box (4) towards the rear wall (22); said deflector (40) heading said rear wall (22) and defining a deflector (40) for inlet of said air current into the box (4); and
    wherein said box (4) comprises a rear opening (46) for inlet of said air current, said rear opening (46) being inferiorly delimited by said deflector (40),
    characterised in that the deflector (40) embraces a central column (5).
  2. The household electrical appliance according to claim 1, characterised in that said box (4) is positionable in a first and in a second position inside said compartment (2); in said first position the box (4) being higher than in the second position; in the first position the box (4) defining a chiller, in the second position the box (4) defining a vegetable crisper; in the first position the mean temperature inside the box (4) being lower than in the second position.
  3. The household electrical appliance according to claim 2, characterised in that in both the first and the second position the box (4) surmounts an underlying vegetable crisper.
  4. The household electrical appliance according to claim 2 or 3, characterised in that it comprises lateral walls (23, 24) which contribute to delimiting said compartment (2) for conserving foodstuffs; in the first and the second position the box (4) being inserted respectively in first and second positioning guides located along said lateral walls (23, 24).
  5. The household electrical appliance according to one of claims from 2 to 4, characterised in that said box (4) comprises:
    - an extractable drawer (41);
    - a frontal flap (42) which, with the drawer closed, contributes to delimiting said box; an extraction stroke of the drawer (41) determining an opening of said frontal flap (42) both in a case in which said box (4) is in the first position and in a case in which the box (4) is in the second position.
  6. The household electrical appliance according to claim 5, characterised in that said frontal flap (42) rotates about a rotation axis (420) which remains stationary during the extraction stroke of the drawer (41); said box (4) comprising a ceiling (45) which surmounts the closed drawer and which remains fixed during the extraction stroke of the drawer (41).
  7. The household electrical appliance according to claim 5 or 6, characterised in that said drawer (41) comprises an arch (43) located in contact with a cam (44) fashioned in said flap (42) for transforming a translating motion of the drawer (41) into a rotary motion of the flap (42).
  8. The household electrical appliance according to claim 5 or 6 or 7, characterised in that the drawer (41) incorporates the deflector (40).
  9. The household electrical appliance according to any one of the preceding claims, characterised in that said cooling means (3) comprise an evaporator plate which extends outside the compartment (2) and behind said rear wall (22).
  10. The household electrical appliance according to any one of the preceding claims, wherein said deflector (40) develops transversally of a surface of said box (4), said surface facing said rear wall (22), optionally said surface being substantially vertical.
  11. A method for conserving foodstuffs, characterised in that it comprises steps of:
    - providing a household refrigeration appliance according to claims 1-10;
    - cooling the rear wall (22) by means of said cooling means (3);
    - generating a cold air current which flows down along the rear wall (22) by natural convection;
    - intercepting said cold air current by means of said deflector (40) and deviating said cold air current at least partly inside the box (4) for refrigerating the inside of the box (4).
EP15199860.6A 2014-12-23 2015-12-14 Household appliance for refrigerating foodstuffs Active EP3037749B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITPR20140095 2014-12-23

Publications (2)

Publication Number Publication Date
EP3037749A1 EP3037749A1 (en) 2016-06-29
EP3037749B1 true EP3037749B1 (en) 2020-02-19

Family

ID=52464478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15199860.6A Active EP3037749B1 (en) 2014-12-23 2015-12-14 Household appliance for refrigerating foodstuffs

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EP (1) EP3037749B1 (en)
RU (1) RU2015154708A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2650630A2 (en) * 2012-04-10 2013-10-16 Samsung Electronics Co., Ltd Refrigerator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5722252A (en) * 1995-10-13 1998-03-03 Lg Electronics, Inc. Cooling air distribution apparatus for refrigerator
TW507061B (en) * 2000-05-22 2002-10-21 Matsushita Refrigeration Corp Refrigerator
ITTO20010050U1 (en) * 2001-03-30 2002-09-30 Merloni Elettrodomestici Spa HOUSEHOLD REFRIGERATION APPARATUS, WITH SLIDING CONTAINER.
WO2003091643A1 (en) * 2002-04-25 2003-11-06 Kabushiki Kaisha Toshiba Shelving unit and refrigerator having the same
ATE468779T1 (en) * 2004-04-13 2010-06-15 Whirlpool Co DRAWER CHARGER
PL2245394T3 (en) * 2007-12-31 2017-07-31 Arçelik Anonim Sirketi A cooling device
EP2751506B1 (en) * 2011-08-31 2017-06-28 Panasonic Corporation Refrigerator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2650630A2 (en) * 2012-04-10 2013-10-16 Samsung Electronics Co., Ltd Refrigerator

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Publication number Publication date
RU2015154708A (en) 2017-06-26
EP3037749A1 (en) 2016-06-29

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