EP3819571A1 - Appareil réfrigérateur - Google Patents

Appareil réfrigérateur Download PDF

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Publication number
EP3819571A1
EP3819571A1 EP19207562.0A EP19207562A EP3819571A1 EP 3819571 A1 EP3819571 A1 EP 3819571A1 EP 19207562 A EP19207562 A EP 19207562A EP 3819571 A1 EP3819571 A1 EP 3819571A1
Authority
EP
European Patent Office
Prior art keywords
outer casing
walls
strips
cabinet
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19207562.0A
Other languages
German (de)
English (en)
Other versions
EP3819571B1 (fr
Inventor
Fabrizio Andreatti
Marcin Nieslony
Andrea Olivani
Alessandro Tartaglione
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 Corp
Original Assignee
Whirlpool Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Priority to EP19207562.0A priority Critical patent/EP3819571B1/fr
Publication of EP3819571A1 publication Critical patent/EP3819571A1/fr
Application granted granted Critical
Publication of EP3819571B1 publication Critical patent/EP3819571B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/062—Walls defining a cabinet
    • F25D23/063—Walls defining a cabinet formed by an assembly of panels
    • 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
    • F25D23/08—Parts formed wholly or mainly of plastics materials
    • F25D23/082—Strips
    • F25D23/085—Breaking strips

Definitions

  • the present invention generally relates to refrigerator appliances and more particularly to a cabinet for a refrigerator appliance having an outer casing made up of metal walls.
  • Refrigerator appliances generally include thermally insulated cabinets that define a chilled chamber configured to receive food items to be stored.
  • a cabinet can have a fresh food chamber and/or a freezer chamber.
  • the fresh food chamber can be maintained at a temperature higher than the freezing point of water.
  • the freezer chamber can be maintained at a temperature equal to or lower than the freezing point of water.
  • the cabinet of a refrigerator appliance comprises an inner casing, also typically called liner, where a fresh food chamber and/or a freezer chamber are formed.
  • the cabinet also includes an outer casing that encloses left, right and rear walls, as well as a top wall and a bottom wall of the liner and defines with it a closed cavity to be filled with a thermally insulating material, such as e.g. a PU foam material.
  • the liner is typically made of a polymeric material, such as e.g. acrylonitrile-butadiene styrene (ABS) or high impact polystyrene (HIPS) and manufactured as a single piece e.g. by thermoforming, while the outer casing is made up of a number of sheet metal panels.
  • all walls of the outer casing can be manufactured as independent members and assembled to each other by way of screws, fasteners and the like.
  • side walls and a top wall of the outer casing can be manufactured in a single piece by bending a single sheet metal plate cut from a coil, while a rear or back wall and a bottom wall can be made as independent components. Further configurations are also possible.
  • the liner In order to carry out foaming, the liner, previously equipped with all the necessary evaporator devices and components, and the outer casing are assembled to each other, arranged into a foaming jig and subsequently processed in a foaming apparatus, wherein a thermally insulating material is injected into the closed cavity of the cabinet so obtained, made to expand and cure.
  • Assembly between the outer casing and the liner is typically obtained by way of shape couplings, e.g. by fitting suitably shaped edges of the metal panels with correspondingly suitably shaped profiles formed along the peripheral edges of the plastic liner.
  • shape couplings e.g. by fitting suitably shaped edges of the metal panels with correspondingly suitably shaped profiles formed along the peripheral edges of the plastic liner.
  • Couplings among the components forming the outer casing are instead achieved by way of fasteners such as e.g. screws, rivets and the like, which may cause leakages of foam material at the coupling interface. This is due to planarity issues of sheet metal components, as well as to the mechanical rigidity of the metal parts arranged in contact with each other.
  • the technical problem underlying and solved by the present invention is therefore to provide an improved full metal casing for a refrigerator appliance allowing to minimize foam leakages, as well as a related manufacturing method.
  • a cabinet for a refrigerator appliance comprises an inner casing wherein a cavity configured to receive food items to be stored is formed and an outer casing having a top wall, a bottom wall, a rear wall and side walls.
  • the outer casing is joined to a front wall of the inner casing and the top wall, the bottom wall, the rear wall and the side walls of the outer casing are spaced apart from the inner casing so as to define with it a cavity to be filled with a thermally insulating material.
  • All the walls forming the outer casing are made of a metal material and strips made of a material softer than said metal material are applied at the interfaces between neighboring metal walls.
  • Suitable materials for the manufacturing of the strips are e.g. polymeric materials such as e.g. polypropylene, or aluminized cardboard.
  • the strips can be applied on the peripheral edges of any one of a pair of neighboring walls. Glue or adhesive tape can be used to assemble the strips to the peripheral edges of the walls.
  • Assembly of the strips along the peripheral edges can advantageously be carried out automatically in a manufacturing line e.g. upon cutting of the panels from sheet-metal coils. Manufacturing costs and times can thus be remarkably reduced compared to prior art assembly solutions.
  • a refrigerator appliance according to the invention is generally indicated by reference number 100.
  • the refrigerator appliance 100 is shown with reference to a three-dimensional coordinate system.
  • a first axis X and a second axis Y that are mutually perpendicular define a horizontal plane, while a third axis Z, perpendicular to said horizontal plane, defines a vertical axis along which the force of gravity acts.
  • the refrigerator appliance 100 hereinafter also referred to as refrigerator only, comprises a cabinet 110 having a cavity configured to store food items.
  • the appliance shown in the drawings is e.g. a "bottom mount" refrigerator, whose cavity comprises a refrigerator compartment 111 formed above a freezer compartment 112 in a vertical direction.
  • the refrigerator compartment 111 and the freezer compartment are separated from each other by a mullion 113.
  • An evaporator (not shown in the drawings) is typically provided to cool the refrigerator compartment 111 and the freezer compartment 112 at cooling temperatures generally comprised between 1°C and 10°C and between -18°C and -28°C, respectively.
  • the cabinet 110 comprises an inner casing or liner 114 e.g. made of a polymeric material, such as e.g. acrylonitrile-butadiene styrene (ABS) or high impact polystyrene (HIPS), wherein the refrigerator compartment 111 and the freezer compartment 112 are formed, and an outer casing 115.
  • a polymeric material such as e.g. acrylonitrile-butadiene styrene (ABS) or high impact polystyrene (HIPS)
  • ABS acrylonitrile-butadiene styrene
  • HIPS high impact polystyrene
  • the outer casing 115 comprises a pair of spaced apart side walls 116a, 116b, a top wall 117, a bottom wall 118 and a back wall 119 intended to be associated with a condenser (not shown in the drawings).
  • the outer casing 115 is joined to a front wall of the liner 114, and the top wall 117, the bottom wall 118, the rear wall 119 and the side walls 116a, 116b of the outer casing 115 are spaced apart from the liner 114 so as to define with it a cavity to be filled with a thermally insulating material, such as e.g. a PU foaming material.
  • a thermally insulating material such as e.g. a PU foaming material.
  • the refrigerator compartment 111 and the freezer compartment 112 are selectively accessible through respective doors 120, 121.
  • the refrigerator 100 further typically comprises a machine compartment 130 where a compressor and a drip pan (not shown in the drawings) are arranged.
  • all the walls forming the outer casing 115 are made of a metal material, e.g. sheet-metal from steel, and strips 140 made of a made of a material softer than said metal material are applied at the interfaces between neighboring metal walls.
  • the strips may be made of e.g. a polymeric material such as polypropylene.
  • Aluminized cardboard can alternatively be used.
  • the top wall 117, the bottom wall 118 and the back wall 119 of the outer casing 115 may e.g. be manufactured as a single metal piece obtained by bending a sheet metal steel panel cut from a coil.
  • the bottom wall 118 features a stepped profile needed to accommodate devices such as e.g. a compressor and a drip pan (not shown in the drawings) to be housed in the machine compartment 130 of the refrigerator appliance 100.
  • the side metal walls 116a, 116b of the outer casing 115 are instead manufactured as independent members from respective sheet metal panels to be assembled thereto, as it will be explained in greater detail in the following.
  • the strips 140 made of a polymeric material are e.g. applied along the side edges of the top wall 117, bottom wall 118 and back wall 119 manufactured as a single sheet metal piece and partially protrude from them.
  • the side metal walls 116a, 116b are arranged in a foaming jig aside such single piece so as to surround and enclose the liner 114.
  • the strips 140 protruding from the edges of the top wall 117, bottom wall 118 and back wall 119 close the gaps between the neighboring edges of the side metal walls 116a, 116b.
  • the strips 140 act as seals preventing foam leakages during foaming of the cabinet 110.
  • a polymeric material such as e.g. polypropylene or of aluminized cardboard, or more generally a material softer than the sheet metal material used to manufacture the walls of the outer casing 115, allows to achieve suitable sealing thanks to the deformability of these materials compared to sheet metal.
  • the strips 140 might as well be applied along the side edges of the side walls 116a, 116b. More generally, the strips 140 can be applied on the peripheral edges of any one of the walls intended to form neighboring walls of the outer casing 115.
  • the strips 140 can be assembled to the edges of the sheet-metal components by gluing or adhesive tape.
  • the strips 140 may advantageously be bent 90 degrees before assembling the metal walls of the outer casing 115 into a foaming jig. This manufacturing step facilitates positioning of the cabinet components inside the foaming jig and allows to improve the sealing action of the strips 140 against foam leakages.
  • assembly of the strips 140 along the edges of the sheet-metal panels intended to form walls of the outer casing 115 can be carried out automatically in a manufacturing line e.g. upon cutting of the panels from sheet-metal coils. This allows to optimize costs and reduce manufacturing time.
  • the strips 140 may advantageously be applied in form of continuous bands along the edges and cut at a length corresponding to the length of the panels.
  • Figure 5 schematically shows the result of a manufacturing step whereby the strips 140 are applied along opposite edges of a sheet-metal panel e.g. cut from a coil and intended to form the top, rear and bottom walls 117, 119 and 118 of the outer casing 115 by bending.
  • the dashed lines schematically show the lines or portions at which the panel has to be bent so as to form these walls.
  • Reliefs 141 may advantageously be formed in the strips 140 at corner portions of the walls forming the outer casing 115. This allows to prevent formation of wrinkles and to achieve good seals against possible foam leakages during the foaming process.
  • reliefs in the strips 140 is particularly advantageous when a number of walls of the outer casing 115 are formed as a single piece by bending a sheet-metal panel.
  • the reliefs 141 formed in the strips 140 are obtained e.g. by making dovetail notches in the strips 140.
  • strips made of a material softer than a metal material forming the walls of the outer casing 115 can also be advantageously employed for the manufacturing of the outer casing of cabinets for refrigerator appliances having skin condensers, such as e.g. the refrigerator appliance disclosed in the international patent application WO 2018/080473 A1 , or the refrigerator appliance disclosed in the European patent application 19182735.1 , both in the Applicant's name.
  • edges of skin condensers which are made up of metal panels applied on serpentine tubes, can in fact be effectively sealed by way of strips made of a polymeric material, such as e.g. polypropylene, or of aluminized cardboard, instead of resorting to prior art bent edges directly formed on the metal panels of the skin condenser.
  • a polymeric material such as e.g. polypropylene, or of aluminized cardboard

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)
  • Refrigerator Housings (AREA)
EP19207562.0A 2019-11-06 2019-11-06 Appareil réfrigérateur Active EP3819571B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19207562.0A EP3819571B1 (fr) 2019-11-06 2019-11-06 Appareil réfrigérateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19207562.0A EP3819571B1 (fr) 2019-11-06 2019-11-06 Appareil réfrigérateur

Publications (2)

Publication Number Publication Date
EP3819571A1 true EP3819571A1 (fr) 2021-05-12
EP3819571B1 EP3819571B1 (fr) 2023-05-03

Family

ID=68502816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19207562.0A Active EP3819571B1 (fr) 2019-11-06 2019-11-06 Appareil réfrigérateur

Country Status (1)

Country Link
EP (1) EP3819571B1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380615A (en) * 1965-11-17 1968-04-30 Westinghouse Electric Corp Refrigeration apparatus cabinet construction
JPS4844845A (fr) * 1970-12-30 1973-06-27
GB1594439A (en) * 1978-02-14 1981-07-30 Hotpoint Ltd Cabinets for refrigerators or freezers
US4905865A (en) * 1988-01-29 1990-03-06 Hoshizaki Electric Co., Ltd. Aperture structure in a heat insulation container
DE9204365U1 (de) * 1992-03-31 1992-07-02 Liebherr-Hausgeraete Gmbh, 7955 Ochsenhausen Wandelement und/oder Tür mit niedrigem Wärmedurchgangskoeffizient
US20030141793A1 (en) * 2002-01-28 2003-07-31 Lee Jung Owan Refrigerator using EPS insulating material
EP2447639A2 (fr) * 2010-10-28 2012-05-02 LG Electronics Inc. Réfrigérateur comportant un espace vide
WO2018022006A1 (fr) * 2016-07-26 2018-02-01 Whirlpool Corporation Procédé de fabrication d'une structure isolée pour un réfrigérateur
WO2018044274A1 (fr) * 2016-08-30 2018-03-08 Whirlpool Corporation Disjoncteur à pont thermique en plastique surmoulé scellé hermétiquement avec doublure et enveloppe pour une structure isolée sous vide
WO2018080473A1 (fr) 2016-10-26 2018-05-03 Whirlpool Corporation Conception de condenseur à surface intégrée dans le dos d'un réfrigérateur

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380615A (en) * 1965-11-17 1968-04-30 Westinghouse Electric Corp Refrigeration apparatus cabinet construction
JPS4844845A (fr) * 1970-12-30 1973-06-27
GB1594439A (en) * 1978-02-14 1981-07-30 Hotpoint Ltd Cabinets for refrigerators or freezers
US4905865A (en) * 1988-01-29 1990-03-06 Hoshizaki Electric Co., Ltd. Aperture structure in a heat insulation container
DE9204365U1 (de) * 1992-03-31 1992-07-02 Liebherr-Hausgeraete Gmbh, 7955 Ochsenhausen Wandelement und/oder Tür mit niedrigem Wärmedurchgangskoeffizient
US20030141793A1 (en) * 2002-01-28 2003-07-31 Lee Jung Owan Refrigerator using EPS insulating material
EP2447639A2 (fr) * 2010-10-28 2012-05-02 LG Electronics Inc. Réfrigérateur comportant un espace vide
WO2018022006A1 (fr) * 2016-07-26 2018-02-01 Whirlpool Corporation Procédé de fabrication d'une structure isolée pour un réfrigérateur
WO2018044274A1 (fr) * 2016-08-30 2018-03-08 Whirlpool Corporation Disjoncteur à pont thermique en plastique surmoulé scellé hermétiquement avec doublure et enveloppe pour une structure isolée sous vide
WO2018080473A1 (fr) 2016-10-26 2018-05-03 Whirlpool Corporation Conception de condenseur à surface intégrée dans le dos d'un réfrigérateur

Also Published As

Publication number Publication date
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