EP2615042A1 - Récipient comportant au moins une double paroi et procédé d'isolation d'une double paroi d'un récipient - Google Patents

Récipient comportant au moins une double paroi et procédé d'isolation d'une double paroi d'un récipient Download PDF

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Publication number
EP2615042A1
EP2615042A1 EP12150563.0A EP12150563A EP2615042A1 EP 2615042 A1 EP2615042 A1 EP 2615042A1 EP 12150563 A EP12150563 A EP 12150563A EP 2615042 A1 EP2615042 A1 EP 2615042A1
Authority
EP
European Patent Office
Prior art keywords
wall member
bag
bags
opening
intermediate space
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.)
Withdrawn
Application number
EP12150563.0A
Other languages
German (de)
English (en)
Inventor
Hendrik Pieter Oversloot
Luciënne Jozefina Wilhelmina Maria Krosse
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.)
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Original Assignee
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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 Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO filed Critical Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Priority to EP12150563.0A priority Critical patent/EP2615042A1/fr
Priority to PCT/NL2012/050609 priority patent/WO2013036109A1/fr
Publication of EP2615042A1 publication Critical patent/EP2615042A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3813—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container
    • B65D81/3823—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container formed of different materials, e.g. laminated or foam filling between walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/06—Coverings, e.g. for insulating purposes
    • 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
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/14—Insulation with respect to heat using subatmospheric pressure

Definitions

  • the invention relates to the art of thermally insulated containers (e.g. freight containers) or cabinet structures (such as refrigerators) and more particularly relates to a container comprising at least one double wall provided with insulation material.
  • thermally insulated containers e.g. freight containers
  • cabinet structures such as refrigerators
  • Such a cabinet structure is for example known from US-A-6,109,712 .
  • an insulation material is placed atop a first wall portion of the cabinet before the cabinet is assembled.
  • a barrier sheet e.g. a metallic foil, is positioned over the insulation material such that annular edge portions extending over the insulation material is in contact with the wall portion.
  • the annular edge portions are sealed to the wall portion after which the space surrounded by the barrier sheet and the wall portion is evacuated, and the barrier sheet is hermetically sealed.
  • the cabinet is assembled such that another wall portion is positioned at the side of the insulation material opposite the first wall portion, and a second insulation material, preferably polyurethane foam, is injected between the two walls.
  • the thickness of the final insulation material is irreproducible and can display variations in thickness and thus insulation properties. Furthermore folding of the annular edge seal can occur which, together with the permeable nature of the wall portion can over time lead to loss of vacuum and thus insulation.
  • the second insulation material e.g. polyurethane foam
  • the metallic foil is very sensitive and just a minor impact may lead to a disruption of the hermetic seal leading to loss of vacuum and thus thermal insulation. Due to these problems such insulation is insufficient for use in professional construction environment, and thus is not suitable for e.g. vacuum insulated air freight containers.
  • VIPs vacuum insulation panels
  • a hermetically sealed aluminium barrier surrounding granular insulation material are produced in predetermined dimensions and placed next to each other to cover a respective wall of the container or cabinet.
  • This manner of insulation provides the problem that due to the predetermined dimensions of the VIPs it is not always possible to correctly insulate containers or cabinets with non-matching dimensions.
  • the aluminium barrier is very fragile, and in particular at places where two VIPs are put next to each other thermal leakage can occur.
  • the present invention provides a container comprising at least one double wall, said double wall having a bottom wall member and an inner and an outer wall member, said inner wall member and outer wall member each having a bottom edge and an upper edge, said inner wall member and outer wall member being spaced from each other and connected to each other by the bottom wall member at their respective bottom edges, said bottom wall member, inner wall member and outer wall member enclosing an intermediate space, wherein said intermediate space comprises at least two hermetically sealed bags, each bag being of flexible, air tight material, each of said bags being arranged in the intermediate space and having at least one sealed opening, each of said bags further being filled with insulation material, each bag being evacuated, said bags each having opposite side edges extending substantially perpendicular to the bottom wall member, and wherein said bags overlap each other at their side edges. Since the bags overlap one another it is possible to insulate all the space between the inner and outer wall member thus reducing thermal leakage.
  • an improved thermal insulation is obtained in the embodiment of a container of the invention in which said at least one bag comprises a first side edge and a second side edge, said first side edge being positioned on one side with respect to the corner and said second side edge being positioned on the other side of the corner.
  • each bag is provided on its inner side with a profiled element which extends in the direction of the side edge thereof, said profiled element having an engagement part, the engagement parts two overlapping two bags being in engagement with each other.
  • a particular suitable insulation material for a container according to the invention is a granular material, preferably composed of silica grains.
  • the at least one sealed opening is fitted with a tubular connection, said tubular connection being recessed.
  • the tubular connection does not protrude which makes the hermetically sealed bag less fragile, and thus the thermal insulation more durable.
  • a more durable insulation can be obtained when said flexible, air tight material is an impact resistant plastic material.
  • the invention further relates to a method of insulating a double wall of a container, said method comprises the steps of:
  • the method comprises the steps of providing said double wall with a corner, providing said at least one bag with a first side edge and a second side edge, and arranging said at least one bag in the corner of the double wall such that said first side edge being positioned on one side with respect to the corner and said second side edge being positioned on the other side of the corner, it is effectively and easy possible to correctly insulate corner areas of containers or cabinets.
  • the method further comprises the steps of:
  • the method comprises the step of providing said at least one bag with at least one filling opening for filling the bag with insulation material and with at least one separate evacuation opening, and the step of sealing all said openings after a sufficient vacuum has been reached.
  • an embodiment of a method according to the invention comprises the step of closing the double wall by connecting a top wall member to the upper edges of the inner wall member and the outer wall member.
  • a very reproducible and effective filling of the bag with insulation material leading to an optimal thermal insulation can be obtained in a preferred embodiment of a method according to the invention in which during the step of filling the at least one bag with insulation material the double wall is vibrated.
  • the method comprises at least one step chosen from the group consisting of: using as insulation material granular material, preferably silica grains, and using as flexible material impact resistant plastic.
  • a container 1 which container 1 comprises at least one double wall 2.
  • the double wall 2 has a bottom wall member 3, an inner wall member 4 and an outer wall member 5.
  • the inner wall member 4 and outer wall member 5 each has a bottom edge 6; 7 and an upper edge 8; 9.
  • the inner wall member 4 and outer wall member 5 are spaced from each other and connected to each other by the bottom wall member 3 at their respective bottom edges 6; 7.
  • the bottom wall member 3, the inner wall member 4 and outer wall member 5 enclose an intermediate space 10 which is accessible from an upper side of the double wall 2 defined by the upper edges 8; 9 of the inner wall member 4 and the outer wall member 5.
  • Both bags 11, 12 are hermetically sealed with the exception of at least one opening 13 (only the opening 13 for the bag 11 is visible in Figure 1 ), which is accessible from the upper side.
  • at least one opening 13 is present for both evacuation and filling (to be discussed later), but it is apparent that more openings can be present and that separate openings for evacuation and filling can be present in different embodiments of the invention.
  • An impact resistant, flexible plastic is used for the bags which is impervious for air.
  • other materials for the bags which allow the long-term evacuation of the bags can be used.
  • the first bag 11 comprises a first side edge 14 and a second side edge 15, and the bag 11 is arranging such that said first side edge 14 is positioned on one side with respect to the corner 16 and said second side edge 15 is positioned on the other side of the corner 16.
  • the bag 11 thus extends over the corner area of the double wall 2.
  • the second bag 12 also comprises side edges (one of which with reference number 17 is visible in Figure 1 ). All these side edges 14, 15; 17 extend substantially perpendicular to the bottom wall member 3 of the double wall 2.
  • the bags 11, 12 are arranged in the intermediate space 10 such that the bags 11, 12 overlap each other at respective side edges 15; 17.
  • each bag 11, 12 is provided on its inner side with a profiled element 18, 19; 20 which extends in the direction of the side edge 14, 15; 17 thereof.
  • Each profiled element 18, 19; 20 has an engagement part 18a, 19a; 20a, in the shown embodiment formed by an L-shaped arm extending substantially perpendicular to the plane of the inner and outer wall members 4, 5.
  • the profiled elements comprises rounded of edges to prevent damaging the bags. Please note that it will be clear for a person skilled in the art that other profiled elements comprising engagement parts can be used in different embodiments.
  • each of the bags 11, 12 is filled with insulation material, in the present embodiment with silica grains, via the opening 13. 14.
  • the double wall construction 2 is vibrated by moving a platform 21 on which the double wall construction 2 is supported in different directions as indicated by the arrows. This vibration results in a proper filling of the bags with granular material.
  • the opening 13 is connected to an evacuation system (known per se) and an evacuation pressure is applied on the inside of the bags 11, 12.
  • an evacuation pressure is applied on the inside of the bags 11, 12.
  • the dimension of the bags 11, 12 is reduced, thereby causing the profiled elements 19, 20 to move away from each other.
  • the engagement parts 19a, 20a engage one another so that the initially realized overlap of the two bags 11, 12 remains.
  • the opening 13 is hermetically sealed by any known means, resulting in a vacuum insulated container.
  • the upper side of the double wall 2 can be closed by connecting a top wall member (not shown in Figure 1 ) to the upper edges 8, 9 of the inner wall member 4 and the outer wall member 5.
  • a container 1 with an isolated double wall 2 is obtained in which said double wall 2 has a bottom wall member 3 and an inner wall member 4 and an outer wall member 5.
  • Said inner wall member 4 and outer wall member 5 each has a bottom edge 6, 7 and an upper edge 8, 9 and are spaced from each other and connected to each other by the bottom wall member 3 at their respective bottom edges 6, 7.
  • the bottom wall member 3, inner wall member 4 and outer wall member 5 enclose an intermediate space 10, in which at least one hermetically sealed bag 11, 12 of flexible, air tight material is arranged.
  • the bags 11, 12 are arranged in the intermediate space 10 and have at least one sealed opening 13, which is recessed in order not to protrude from the bag.
  • Each bag 11, 12 is filled with insulation material (preferably silica grains) and is evacuated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Thermal Insulation (AREA)
EP12150563.0A 2011-09-08 2012-01-10 Récipient comportant au moins une double paroi et procédé d'isolation d'une double paroi d'un récipient Withdrawn EP2615042A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12150563.0A EP2615042A1 (fr) 2012-01-10 2012-01-10 Récipient comportant au moins une double paroi et procédé d'isolation d'une double paroi d'un récipient
PCT/NL2012/050609 WO2013036109A1 (fr) 2011-09-08 2012-09-04 Récipient comprenant au moins une double paroi et procédé d'isolation d'une double paroi d'un récipient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12150563.0A EP2615042A1 (fr) 2012-01-10 2012-01-10 Récipient comportant au moins une double paroi et procédé d'isolation d'une double paroi d'un récipient

Publications (1)

Publication Number Publication Date
EP2615042A1 true EP2615042A1 (fr) 2013-07-17

Family

ID=45463469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12150563.0A Withdrawn EP2615042A1 (fr) 2011-09-08 2012-01-10 Récipient comportant au moins une double paroi et procédé d'isolation d'une double paroi d'un récipient

Country Status (1)

Country Link
EP (1) EP2615042A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4082742A1 (fr) * 2021-04-30 2022-11-02 Whirlpool Corporation Procédé de fabrication d'un panneau d'isolation comprimé pour une structure d'isolation sous vide

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128336A (en) * 1936-03-25 1938-08-30 Torstensson Sture Folke Insulation
EP0645576A1 (fr) * 1993-09-29 1995-03-29 Aktiebolaget Electrolux Procédé de remplissage et de comprimage de poudre pour l'isolation thermique dans les parois d'un corps d'armoire
JPH07101476A (ja) * 1993-09-30 1995-04-18 Nippon Sanso Kk 断熱容器とその製造方法
US6109712A (en) 1998-07-16 2000-08-29 Maytag Corporation Integrated vacuum panel insulation for thermal cabinet structures
US20040069789A1 (en) * 2002-09-12 2004-04-15 Takashi Ohno Heat-insulating container
JP2006161834A (ja) * 2004-12-02 2006-06-22 Renaissance Energy Investment:Kk 断熱用ブロック及び低温貯蔵庫

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128336A (en) * 1936-03-25 1938-08-30 Torstensson Sture Folke Insulation
EP0645576A1 (fr) * 1993-09-29 1995-03-29 Aktiebolaget Electrolux Procédé de remplissage et de comprimage de poudre pour l'isolation thermique dans les parois d'un corps d'armoire
JPH07101476A (ja) * 1993-09-30 1995-04-18 Nippon Sanso Kk 断熱容器とその製造方法
US6109712A (en) 1998-07-16 2000-08-29 Maytag Corporation Integrated vacuum panel insulation for thermal cabinet structures
US20040069789A1 (en) * 2002-09-12 2004-04-15 Takashi Ohno Heat-insulating container
JP2006161834A (ja) * 2004-12-02 2006-06-22 Renaissance Energy Investment:Kk 断熱用ブロック及び低温貯蔵庫

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4082742A1 (fr) * 2021-04-30 2022-11-02 Whirlpool Corporation Procédé de fabrication d'un panneau d'isolation comprimé pour une structure d'isolation sous vide
US11623413B2 (en) 2021-04-30 2023-04-11 Whirlpool Corporation Method for manufacturing a compressed insulation panel for a vacuum insulated structure
US12053937B2 (en) 2021-04-30 2024-08-06 Whirlpool Corporation Method for manufacturing a compressed insulation panel for a vacuum insulated structure

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