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EP3619485B1 - Refrigerator comprising a plastic inner lining - Google Patents

Refrigerator comprising a plastic inner lining Download PDF

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Publication number
EP3619485B1
EP3619485B1 EP18715631.0A EP18715631A EP3619485B1 EP 3619485 B1 EP3619485 B1 EP 3619485B1 EP 18715631 A EP18715631 A EP 18715631A EP 3619485 B1 EP3619485 B1 EP 3619485B1
Authority
EP
European Patent Office
Prior art keywords
polyurethane
refrigerator
lower layer
inner lining
polystyrene based
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
EP18715631.0A
Other languages
German (de)
French (fr)
Other versions
EP3619485A1 (en
Inventor
Hakan OZKAN
Emre DEMIRTAS
Serhat CATALORMAN
Sebehattin SEN
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Priority to PL18715631T priority Critical patent/PL3619485T3/en
Publication of EP3619485A1 publication Critical patent/EP3619485A1/en
Application granted granted Critical
Publication of EP3619485B1 publication Critical patent/EP3619485B1/en
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
    • F25D23/065—Details
    • F25D23/066—Liners

Definitions

  • the present invention relates to a refrigerator in which plastic material is used in producing the inner lining of its body.
  • quadrilateral plates made of polystyrene (HIPS - High Impact Polystyrene) material by way of extrusion, are used, and the net shape to said plates is given by thermoforming.
  • polystyrene HIPS - High Impact Polystyrene
  • polyurethane In the refrigerator body, generally polyurethane is used as heat insulation material. Polyurethane expands and solidifies during production once it is injected into the refrigerator body. During this process, pockets form inside the polyurethane in case polyurethane is not distributed homogeneously, leading in time to collapses on the body walls contacting the polyurethane.
  • WO2013038003 discloses a cooler comprising a body having an inner lining, an outer wall, an insulation volume provided between the inner lining and the outer wall and an insulation material filled into the insulation volume, in which the pockets formed within the insulation material are eliminated.
  • a net enabling homogeneous distribution of polyurethane is placed on the surface of the inner lining of the refrigerator facing the insulation volume, but said netting implementation causes a high increase in refrigerator production costs.
  • the "corona" process used to adapt the inner lining with the polyurethane in terms of homogeneous distribution of the polyurethane is also an application increasing the costs.
  • Other known cooler inner liners are disclosed in DE102010040362 , WO92/13716 and WO2011/003711 .
  • the aim of the present invention is to realize a refrigerator having an inner lining whose surface roughness is increased during production so as to improve adherence to the polyurethane in the insulation volume within the refrigerator body.
  • the inner linings of the body and the doors are made of plastic plates by way of extrusion.
  • the inner lining has a three layered structure, and comprises an upper layer made of glossy polystyrene based plastic material, forming the inner surface of the inner lining facing the compartments, an interlayer resistant to the chemicals in polyurethane, and a lower layer contacting the polyurethane injected in the insulation volume between the inner lining and outer wall of the body, wherein the roughness of its surface contacting the polyurethane is increased by adding a chemical foaming agent to the polystyrene based main material.
  • the foaming agent added during production of the inner lining to the polystyrene based main material of the lower layer in order to decrease weight, is transitioned to the gaseous phase on the surface of the lower layer contacting the polyurethane, thereby enabling roughening of the surface of the lower layer facing the insulation volume due to the effect of the foaming agent.
  • the refrigerator (1) comprises a body (2), at least one door (3), at least one cooler/freezer compartment (4) in which the food products and beverages are placed, an inner lining (5) made of plastic material by way of extrusion, forming the inner surfaces of the body (2) and the doors (3) facing the compartments (4), an outer wall (6) forming the outer side of the body (2) and the doors (3), and an insulation volume (7) provided between the inner lining (5) and the outer wall (6), into which polyurethane (PU) is injected.
  • PU polyurethane
  • the inner lining (5) has a three layered structure, and comprises an upper layer (8) made of glossy polystyrene based plastic material, forming the inner surface of the inner lining (5) facing the compartments (4), an interlayer (9) made of polystyrene based plastic material of high resistance to the chemicals in polyurethane, and a lower layer (10) provided at the insulation volume (7) side, contacting the polyurethane injected in the insulation volume (7), its surface contacting the polyurethane being roughened by adding a chemical foaming agent to the polystyrene based main material.
  • the chemical foaming agent used in weight reduction is added during production to the polystyrene based plastic material forming the lower layer (10).
  • the chemical foaming agent transitions to the gaseous phase within a specific temperature range and forms pockets in the polystyrene based main material.
  • Roughening of the lower layer (10) of the inner lining (5) contacting the polyurethane injected in the insulation volume (7) improves adherence of the polyurethane to the plastic material and enables homogeneous distribution of the polyurethane in the insulation volume (7).
  • the chemical foaming agent also enables reducing the weight of the lower layer (10) and therefore of the inner lining (5), and less raw materials are used compared to the state of the art.
  • the foaming agent added during production of the inner lining (5) to the polystyrene based main material of the lower layer (10), is transitioned to the gaseous phase on the surface of the lower layer (10) contacting the polyurethane, so as to enable roughening of the surface of the lower layer (10) facing the insulation volume (7).
  • foaming agent is added during production to the polystyrene based main material of the lower layer (10) in the ratio of 2 - 4%.
  • the lower layer (10) roughened using the foaming agent has a thickness in the range of 90-150 ⁇ m, and the surface of the lower layer (10) contacting the polyurethane has a roughness value in the range of Ra: 30 - 40 ⁇ m (in the state of the art, said roughness value is identified to be in the range of Ra: 1 - 1.5 ⁇ m).
  • the glossy polystyrene based upper layer (8) has a thickness in the range of 90 - 150 ⁇ m
  • the polyurethane chemicals resistant polystyrene based interlayer (9) has a thickness in the range of 2.5 - 4.6 mm.
  • the refrigerator (1) of the invention eliminates the necessity of the netting implementation used for homogeneous distribution of the polyurethane in the insulation volume (7), and the "corona" process used to adapt the polystyrene material to the polyurethane, providing cost advantage.
  • the polyurethane is distributed in the insulation volume (7) homogeneously and without pockets. Collapses are prevented from forming on the outer wall (6) of the body (2).

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)
  • Molding Of Porous Articles (AREA)

Description

  • The present invention relates to a refrigerator in which plastic material is used in producing the inner lining of its body. In production of inner linings of refrigerator body and doors, quadrilateral plates made of polystyrene (HIPS - High Impact Polystyrene) material by way of extrusion, are used, and the net shape to said plates is given by thermoforming. In the refrigerator body, generally polyurethane is used as heat insulation material. Polyurethane expands and solidifies during production once it is injected into the refrigerator body. During this process, pockets form inside the polyurethane in case polyurethane is not distributed homogeneously, leading in time to collapses on the body walls contacting the polyurethane. As a solution to this problem, state of the art international patent application no. WO2013038003 discloses a cooler comprising a body having an inner lining, an outer wall, an insulation volume provided between the inner lining and the outer wall and an insulation material filled into the insulation volume, in which the pockets formed within the insulation material are eliminated. In said patent application, a net enabling homogeneous distribution of polyurethane is placed on the surface of the inner lining of the refrigerator facing the insulation volume, but said netting implementation causes a high increase in refrigerator production costs. The "corona" process used to adapt the inner lining with the polyurethane in terms of homogeneous distribution of the polyurethane, is also an application increasing the costs. Other known cooler inner liners are disclosed in DE102010040362 , WO92/13716 and WO2011/003711 .
  • The aim of the present invention is to realize a refrigerator having an inner lining whose surface roughness is increased during production so as to improve adherence to the polyurethane in the insulation volume within the refrigerator body.
  • In the refrigerator realized to achieve the aim of the present invention, the inner linings of the body and the doors are made of plastic plates by way of extrusion. The inner lining has a three layered structure, and comprises an upper layer made of glossy polystyrene based plastic material, forming the inner surface of the inner lining facing the compartments, an interlayer resistant to the chemicals in polyurethane, and a lower layer contacting the polyurethane injected in the insulation volume between the inner lining and outer wall of the body, wherein the roughness of its surface contacting the polyurethane is increased by adding a chemical foaming agent to the polystyrene based main material. The foaming agent added during production of the inner lining to the polystyrene based main material of the lower layer in order to decrease weight, is transitioned to the gaseous phase on the surface of the lower layer contacting the polyurethane, thereby enabling roughening of the surface of the lower layer facing the insulation volume due to the effect of the foaming agent.
  • The refrigerator realized to achieve the aims of the present invention is illustrated in the accompanying drawings, wherein:
    • Figure 1 is a schematic view of a refrigerator.
    • Figure 2 is a schematic view of the three layered inner lining structure provided in the refrigerator of the invention.
  • The elements in the figures are numbered individually and the correspondence of these numbers are given hereinafter.
    1. 1. Refrigerator
    2. 2. Body
    3. 3. Door
    4. 4. Compartment
    5. 5. Inner lining
    6. 6. External wall
    7. 7. Insulation volume
    8. 8. Upper layer
    9. 9. Interlayer
    10. 10. Lower layer
  • The refrigerator (1) comprises a body (2), at least one door (3), at least one cooler/freezer compartment (4) in which the food products and beverages are placed, an inner lining (5) made of plastic material by way of extrusion, forming the inner surfaces of the body (2) and the doors (3) facing the compartments (4), an outer wall (6) forming the outer side of the body (2) and the doors (3), and an insulation volume (7) provided between the inner lining (5) and the outer wall (6), into which polyurethane (PU) is injected.
  • In the refrigerator (1) of the invention, the inner lining (5) has a three layered structure, and comprises an upper layer (8) made of glossy polystyrene based plastic material, forming the inner surface of the inner lining (5) facing the compartments (4), an interlayer (9) made of polystyrene based plastic material of high resistance to the chemicals in polyurethane, and a lower layer (10) provided at the insulation volume (7) side, contacting the polyurethane injected in the insulation volume (7), its surface contacting the polyurethane being roughened by adding a chemical foaming agent to the polystyrene based main material.
  • The chemical foaming agent used in weight reduction, is added during production to the polystyrene based plastic material forming the lower layer (10). When used in predetermined proportions, the chemical foaming agent transitions to the gaseous phase within a specific temperature range and forms pockets in the polystyrene based main material. Roughening of the lower layer (10) of the inner lining (5) contacting the polyurethane injected in the insulation volume (7), improves adherence of the polyurethane to the plastic material and enables homogeneous distribution of the polyurethane in the insulation volume (7). The chemical foaming agent also enables reducing the weight of the lower layer (10) and therefore of the inner lining (5), and less raw materials are used compared to the state of the art.
  • In an embodiment of the invention, the foaming agent added during production of the inner lining (5) to the polystyrene based main material of the lower layer (10), is transitioned to the gaseous phase on the surface of the lower layer (10) contacting the polyurethane, so as to enable roughening of the surface of the lower layer (10) facing the insulation volume (7).
  • In an embodiment of the invention, foaming agent is added during production to the polystyrene based main material of the lower layer (10) in the ratio of 2 - 4%. The lower layer (10) roughened using the foaming agent has a thickness in the range of 90-150 µm, and the surface of the lower layer (10) contacting the polyurethane has a roughness value in the range of Ra: 30 - 40 µm (in the state of the art, said roughness value is identified to be in the range of Ra: 1 - 1.5 µm).
  • In an embodiment of the invention, the glossy polystyrene based upper layer (8) has a thickness in the range of 90 - 150 µm, and the polyurethane chemicals resistant polystyrene based interlayer (9) has a thickness in the range of 2.5 - 4.6 mm.
  • The refrigerator (1) of the invention eliminates the necessity of the netting implementation used for homogeneous distribution of the polyurethane in the insulation volume (7), and the "corona" process used to adapt the polystyrene material to the polyurethane, providing cost advantage. The polyurethane is distributed in the insulation volume (7) homogeneously and without pockets. Collapses are prevented from forming on the outer wall (6) of the body (2).

Claims (5)

  1. A refrigerator (1) comprising a body (2), at least one door (3), at least one cooler/freezer compartment (4) in which the food products and beverages are placed, an inner lining (5) made of plastic material by way of extrusion, forming the inner surfaces of the body (2) and the doors (3) facing the compartments (4), having an upper layer (8) made of glossy polystyrene based plastic material, an outer wall (6) forming the outer side of the body (2) and the doors (3), and an insulation volume (7) provided between the inner lining (5) and the outer wall (6), into which polyurethane (PU) is injected,
    the inner lining (5) comprising a lower layer (10) provided at the insulation volume (7) side of the inner lining (5), contacting the polyurethane injected in the insulation volume (7), its surface contacting the polyurethane being roughened by adding a foaming agent to the polystyrene based main material, characterized by an interlayer (9) made of polystyrene based plastic material of high resistance to the chemicals in polyurethane.
  2. A refrigerator (1) according to claim 1, characterized by the foaming agent added to the polystyrene based main material of the lower layer (10), and transitioned to the gaseous phase on the surface of the lower layer (10) contacting the polyurethane.
  3. A refrigerator (1) according to claim 1 or 2, characterized by the foaming agent added during production to the polystyrene based main material of the lower layer (10) in the ratio of 2-4%.
  4. A refrigerator (1) according to claim 1 or 2, characterized by the lower layer (10) roughened using a foaming agent, having a thickness in the range of 90 - 150 µm.
  5. A refrigerator (1) according to claim 1 or 2, characterized by the lower layer (10) whose surface contacting the polyurethane has a roughness value in the range of 30 - 40 µm.
EP18715631.0A 2017-05-03 2018-03-29 Refrigerator comprising a plastic inner lining Active EP3619485B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18715631T PL3619485T3 (en) 2017-05-03 2018-03-29 Refrigerator comprising a plastic inner lining

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2017/06505A TR201706505A3 (en) 2017-05-03 2017-05-03 REFRIGERATOR WITH PLASTIC INNER WALL
PCT/EP2018/058194 WO2018202365A1 (en) 2017-05-03 2018-03-29 Refrigerator comprising a plastic inner lining

Publications (2)

Publication Number Publication Date
EP3619485A1 EP3619485A1 (en) 2020-03-11
EP3619485B1 true EP3619485B1 (en) 2021-03-10

Family

ID=61899255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18715631.0A Active EP3619485B1 (en) 2017-05-03 2018-03-29 Refrigerator comprising a plastic inner lining

Country Status (4)

Country Link
EP (1) EP3619485B1 (en)
PL (1) PL3619485T3 (en)
TR (1) TR201706505A3 (en)
WO (1) WO2018202365A1 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1546832B2 (en) * 1961-09-02 1971-06-24 Robert Bosch Gmbh, 7000 Stuttgart DOUBLE-WALLED THERMAL-INSULATED HOUSING, IN PARTICULAR COOL CABINET
US5219665A (en) * 1991-01-30 1993-06-15 E. I. Du Pont De Nemours And Company Fabricated articles with improved resistance to hydrohalocarbons
US5221136A (en) * 1991-09-12 1993-06-22 Basf Corporation Refrigerator liner structures
US6164739A (en) * 1993-10-18 2000-12-26 The Dow Chemical Company Multilayer protective film
DE202006008251U1 (en) * 2006-03-21 2007-08-02 Liebherr-Hausgeräte Lienz Gmbh Fridge and / or freezer
ES2333275T3 (en) * 2006-05-31 2010-02-18 Arcelik A.S. FRIDGE.
CN102472559B (en) * 2009-07-07 2014-07-30 阿塞里克股份有限公司 A refrigerator comprising plastic inner liner
DE102010040362A1 (en) * 2010-09-07 2012-03-08 BSH Bosch und Siemens Hausgeräte GmbH Housing for a refrigeration device
EP2756241B2 (en) 2011-09-16 2024-09-04 Arçelik Anonim Sirketi A cooling device comprising an insulation material that is provided to be distributed homogeneously in the insulation volume

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
TR201706505A3 (en) 2018-12-21
PL3619485T3 (en) 2021-10-18
EP3619485A1 (en) 2020-03-11
WO2018202365A1 (en) 2018-11-08

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