EP0730558B1 - Kühlcontainer - Google Patents

Kühlcontainer Download PDF

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Publication number
EP0730558B1
EP0730558B1 EP95902072A EP95902072A EP0730558B1 EP 0730558 B1 EP0730558 B1 EP 0730558B1 EP 95902072 A EP95902072 A EP 95902072A EP 95902072 A EP95902072 A EP 95902072A EP 0730558 B1 EP0730558 B1 EP 0730558B1
Authority
EP
European Patent Office
Prior art keywords
sheet members
double
refrigerated container
cladding
container according
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.)
Expired - Lifetime
Application number
EP95902072A
Other languages
English (en)
French (fr)
Other versions
EP0730558A1 (de
Inventor
Niels Peter Raun
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.)
Maersk Container Industri AS
Original Assignee
Maersk Container Industri 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 Maersk Container Industri AS filed Critical Maersk Container Industri AS
Publication of EP0730558A1 publication Critical patent/EP0730558A1/de
Application granted granted Critical
Publication of EP0730558B1 publication Critical patent/EP0730558B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/06—Coverings, e.g. for insulating purposes
    • 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
    • B65D88/00—Large containers
    • B65D88/02—Large containers rigid
    • B65D88/12—Large containers rigid specially adapted for transport
    • B65D88/121—ISO containers
    • 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
    • B65D88/00—Large containers
    • B65D88/74—Large containers having means for heating, cooling, aerating or other conditioning of contents
    • B65D88/745—Large containers having means for heating, cooling, aerating or other conditioning of contents blowing or injecting heating, cooling or other conditioning fluid inside the container
    • 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
    • B65D90/028—Wall construction hollow-walled, e.g. double-walled with spacers

Definitions

  • the present invention concerns a double-walled refrigerated container having an inner cladding and an outer cladding comprising horizontal and vertical, substantially plane sheet members to form the internal and external, respectively, wall, roof and bottom faces of the claddings as well as an intermediate, bonded insulation layer of plastics foam, said sheet members of the outer cladding being attached to the load receiving frame of the container, which comprises upper and lower longitudinal girders as well as upper and lower transverse girders and vertical corner posts at the gables, the lower longitudinal girders being made of sheet members which, seen in cross-section, are smoothly, openly bent profiles, such that the thickness of the insulation layer in the transition between side wall and bottom substantially corresponds to or is greater than the thickness of the side wall insulation layer.
  • Today refrigerated containers of the type mentioned above are widely used for oversea transportation of food products which must be kept cooled at temperatures within very narrow temperature ranges depending upon the nature of the transported goods. These may in particular be meat, fruit or vegetables. Therefore, strict requirements are made with respect to the tightness and the insulation capacity of the container during use for an extended period of time. Also, it is desired to utilize the transport volume of the container as well as possible within the given maximum outer dimensions of the container and particularly in view of the insulation capacity, strength and weight of the refrigerated container. These are factors which are of decisive importance for the transport factors which are of decisive importance for the transport earning capacity when using the refrigerated container in question. It should also be mentioned that the maintenance costs of the refrigerated container should be kept as low as possible.
  • EP-B-0 064 712 discloses a refrigerated container of the type mentioned in the opening paragraph comprising an outer cladding of corrugated wall sheets, where the vertical corrugations of the sheets are terminated inwardly spaced from the sheet rim.
  • the external wall sheets are connected with the upper and lower longitudinal girders and the corner posts by encircling weld seams.
  • the container bottom is supported by underlying, transverse, strong profiles which are connected with the lower longitudinal girders.
  • WO 88/07485 discloses a refrigerated container having a self-supporting floor structure comprising a plane steel floor sheet, an upper extruded T-floor of aluminium and an intermediate, bonded insulation layer of high density foam, such as polyurethane foam having a density from 80 to 90 kg/m 3 .
  • This document exclusively provides teachings for the construction of the floor of the refrigerated container, and thus not for a strong and tight construction of the entire refrigerated container as such.
  • EP-A-0 348 629 discloses another refrigerated container having a self-supporting bottom structure including a plane bottom sheet, an upper extruded T-floor of aluminium and an intermediate, bonded, foamed insulation layer.
  • the longitudinal girder comprises a stiffening L-profile which is coextensive with the longitudinal girder and is positioned inside the insulation.
  • Nothing is said about the longitudinal joints between the longitudinal girder and the bottom sheet and the external side sheets, and thus nothing about how to obtain a strength-imparting construction of the entire refrigerated container as such.
  • these downwardly extending corrugations or underlying I-profiles undesirably occupy a not insignificant part of the internal, effective transport volume of the refrigerated container corresponding to the corrugations or the height of the profiles, if, other things being equal, the insulation capacity of the container bottom is to be maintained.
  • the thickness of the insulation layer in the bottom is frequently reduced, however, in order to obtain an inner transport volume in the refrigerated container as effective as possible, but this consequently results in a significantly deteriorated insulation capacity of the container bottom.
  • the use of longitudinal stiffening profiles in the insulation foam results in undesirable "thermal bridges" in the transition between the bottom and the side wall.
  • the object of the present invention is to provide a refrigerated container of the type mentioned in the opening paragraph which has an optimum utilization of the internal effective transport volume of the refrigerated container, and which is simultaneously both diffusion-tight, strong and has an optimum insulation capacity in particular at the bottom and the transition between the bottom and the side walls also after an extended period of use.
  • the double-walled refrigerated container of the present invention is characterized in that said intermediate insulation layer extends uninterruptedly through the transition between side wall and bottom wall, in that all joints between the sheet members of the inner cladding are all-welded to provide a completely diffusion-tight, strong and rigid inner shell, and in that the sheet members of the outer cladding, which form the bottom face or the sheet members of the lower longitudinal girders, comprise longitudinal, downwardly extending corrugations which extend close to the joint between said sheet members.
  • This structure provides a refrigerated container which has a particularly low weight and high insulation capacity as well as a maximum internal, effective transport volume in relation to the known refrigerated containers.
  • the inner cladding and the outer cladding exclusively comprise sheet members, and the container is thus free of substantial protruding parts or profiles which either extend longitudinally inside the insulation foam, or protrude from the outer side of the container thereby occupying space, and which were necessary in the past to stiffen the container bottom transversely. Further, maximum insulation capacity is maintained at said transitions without thermal bridges.
  • the inner cladding will serve as a load receiving, strong and rigid inner shell in use. Both the inner cladding, the outer cladding and the frame parts can thereby be made of lighter materials than known before. During use for an extended period of time the inner cladding of the container will still be diffusion-tight, in contrast to the known refrigerated containers in which the inner cladding always comprises sheet members which are riveted or glued together.
  • the all-welded inner cladding thus ensures that no water vapour diffusion takes place from the outside and into the container goods and from the inside and out into the insulation. Similarly, diffusion of the CFC reduced cell gas from the insulation of the container into the container goods is prevented.
  • the combination of the all-welded inner shell, the smoothly bent shape of the lower longitudinal girder and the downwardly extending corrugations ensures that the container can be made free of internal longitudinal profiles extending inside the insulation foam.
  • a strong and rigid refrigerated container with an optimum insulation capacity, in particular at the bottom and at the transitions between side wall and bottom.
  • the double-walled refrigerated container 1 shown in fig. 1 comprises an inner cladding 2 of an aluminium sheet material and an outer cladding 3 of a steel sheet material.
  • the refrigerated container 1 moreover comprises an intermediate, bonded insulation layer 4 of extruded polystyrene foam in the bottom and of polyurethane foam in other parts of the container.
  • the inner cladding 2 comprises vertical sheet members 5, 6, which form the internal wall faces of the inner cladding, as well as horizontal sheet members 7, which form the internal roof faces.
  • the inner cladding 2 moreover comprises a T-floor 8 of extruded aluminium profiles welded together. All joints between the sheet members 5, 6, 7 of the inner cladding and the T-floor 8 are all welded to provide a completely diffusion-tight, strong and rigid inner shell.
  • the outer cladding 3 comprises substantially plane sheet members 9, 10, and 11 of a steel material to form the external wall, roof and bottom faces.
  • the sheet members may be provided with transverse, slightly downwardly pressed corrrugations 22 extending spaced from the longitudinal sheet edges.
  • the refrigerated container 1 comprises a load receiving frame which comprises mutually welded upper and lower longitudinal girders 12, 13 as well as upper and lower transverse girders 14, 15 and vertical corner posts 16 at the gables.
  • the upper and lower longitudinal girders 12, 13 are formed of sheet members which, seen in cross-section, are evenly and openly bent profiles, such that the thickness of the insulation layer in the transition between side wall and bottom and between side wall and roof substantially corresponds to or is greater than the thickness of the side wall or roof insulation layer 4.
  • a maximum insulation capacity is hereby maintained in said transitions without thermal bridges.
  • the lower longitudinal girders 13, seen in cross-section, are in the form of a "soft" L-profile so that the bent shape gives the transition of the outer cladding from vertical to horizontal sheet members the form of an external bevel, which has a considerably damage-limiting function in the handling of the container.
  • All joints 17 between the sheet members 9, 10, 11 of the outer cladding and the load receiving frame 13, 14, 15, 16 of the container are all-welded to provide a completely diffusion-tight, strong and rigid outer shell. Welding may take place e.g. by resistance or laser welding. However, the joints 17 may also be provided by a combination of gluing and spot welding, the essential thing being that a diffusion-tight, strong and rigid outer shell is provided. Gluing may e.g. be effected with polyurethane glue.
  • the lower longitudinal girders 13 comprise a longitudinal, downwardly protruding slight corrugation 18, which extends close to the joint 17 between the longitudinal girder concerned and the bottom sheet 11.
  • the longitudinal corrugation 18 protrudes sufficiently down from the bottom to support the container if it is placed with its bottom directly on the ground, and will simultaneously "push” any small stones away, without the bottom being deformed.
  • the longitudinal corrugation 18 also contributes to the desired stiffening of the transition between bottom and side wall.
  • the inner cladding and the outer cladding exclusively comprise sheet members and are substantially free of essential protruding parts or profiles which either extend longitudinally inside the insulation foam or protrude from the outer side of the container, including the bottom, in a space-requiring manner.
  • the container will simultaneously be both more rigid and strong and also have a lower weight as well as higher insulation capacity in relation to the known refrigerated containers, and moreover a greater internal transport volume in the refrigerated container will be obtained.
  • the container also has smooth and clean outer and inner faces.
  • the diffusion-tight, strong and rigid outer cladding and inner cladding ensures a long container service life, since the container will not be just as subject to degradation of the insulation material as the known refrigerated containers, in which most of the sheet members are riveted or glued to the frame.
  • the insulation layer 4 may be formed by plastics foam which have been premanufactured in blocks, which are glued together with the sheet members of the inner cladding 2 and the outher cladding 3, or which are foamed directly between the inner cladding 2 and the outer cladding 3 to fix these.
  • the insulation layer 4 may e.g. comprise extruded polystyrene foam in blocks having a weight of 40 kg/m 3 in the container bottom and polyurethane foam having a weight of 60 kg/m 3 in the walls and of 50 kg/m 3 in the roof.
  • the longitudinal girders may be bent of stainlees steel sheets having a thickness of 3.5 mm
  • the outer sheet members of the outer cladding may be made of stainless steel sheet material having a thickness of 0.7-2.0 mm.
  • the sheet members of the inner cladding are made of aluminium sheet material having a thickness of 3.5 mm.
  • the sheet members 6, 7 and 8 of the inner cladding may be welded to an internal frame 19 of sheet material.
  • the sheet members 9, 10 and 11 in the outer cladding of the container may be welded to an external frame at the gable, said external frame being formed by the welded transverse girders 14, 15 and the vertical corner posts 16.
  • An annular insert of a resilient material 20 may be interposed between the internal frame 19 of sheet material and the external strength-imparting profile frame.
  • the inner cladding and the outer cladding can hereby work slightly with respect to each other because of varying temperature influences and coefficients of thermal expansion, without involving any risk of leakages that might reduce the insulation capacity, while obviating galvanic corrosion that may occur at a metalic connection between inner cladding and outer cladding.
  • the container doors 118 may be provided with an annular, inwardly extending knife or strip 21, which is pressed into a further intermediate insert 20a of rubber or directly into the resilient insert 20 upon closure of the doors 118. This ensures particularly reliable sealing of the doors 118.
  • the longitudinal girders may be bent of sheet members which have many different cross-sectional shapes, e.g. an arc shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Thermal Insulation (AREA)
  • Refrigerator Housings (AREA)

Claims (10)

  1. Doppelwandiger Kühlcontainer (1) mit einer inneren Verkleidung (2) und einer äußeren Verkleidung (3), der horizontale und vertikale, im wesentlichen ebene Plattenelemente (6, 7, 8; 9, 10, 11), um die inneren und äußeren, jeweiligen Wand-, Decken- und Bodenflächen der Verkleidungen (2, 3) zu bilden, sowie eine Verbundisolierzwischenschicht (4) aus Kunststoffschaum aufweist, wobei die Plattenelemente (9, 10, 11) der äußeren Verkleidung (3) an dem lastaufnehmenden Rahmen des Containers (1) angebracht sind, der obere und untere Längsträger (12, 13) sowie obere und untere Querträger (14, 15) und an den Giebeln vertikale Eckpfosten (16) aufweist, wobei die unteren Längsträger (13) aus Plattenelementen angefertigt sind, die im Querschnitt stetig und offen gebogene Profile sind, so daß die Dicke der Isolierschicht (4) in dem Übergang zwischen der Seitenwand und dem Boden im wesentlichen der Dicke der Seitenwandisolierschicht (4) entspricht oder größer ist als dieser, dadurch gekennzeichnet, daß sich die Zwischenisolierschicht kontinuierlich durch den Übergang zwischen der Seitenwand und dem Boden erstreckt, daß alle Stoßstellen (9) zwischen den Plattenelementen 6, 7, 8) der inneren Verkleidung (2) durchgehend verschweißt sind, um einen vollständig diffusionsdichten, stabilen und festen Innenmantel vorzusehen, und daß die Plattenelemente (11) dar äußeren Verkleidung, die die Bodenfläche der Plattenelemente (12, 13) bilden, oder die unteren Längsträger sich der Länge nach, nach unten erstreckende Auskragungen (18) haben, die sich nahe der Stoßstelle (17) zwischen den Plattenelementen erstrecken.
  2. Doppelwandiger Kühlcontainer nach Anspruch 1,
       dadurch gekennzeichnet, daß
    die gebogene Form der Längsträger (12, 13) den Übergängen der äußeren Verkleidung (3) von den vertikalen zu den horizontalen Plattenelementen (9, 10, 11) die Form einer äußeren Abschrägung verleiht.
  3. Doppelwandiger Kühlcontainer nach Anspruch 1 oder 2,
       dadurch gekennzeichnet, daß
    das Plattenmaterial der Längsträger (12, 13) eine Dicke hat, die das zwei- bis zehnfache der Dicke der Plattenelemente (9, 10, 11) der äußeren Verkleidung ist.
  4. Doppelwandiger Kühlcontainer nach einem oder mehreren der Ansprüche 1 bis 3,
       dadurch gekennzeichnet, daß
    alle Stoßstellen (17) zwischen den Plattenelementen (9, 10, 11) der äußeren Verkleidung und des lastaufnehmenden Rahmens (12, 13, 14, 15, 16) des Containers (1) durchgehend verschweißt sind, um einen vollständig diffusionsdichten, stabilen und festen Außenmantel vorzusehen.
  5. Doppelwandiger Kühlcontainer nach Anspruch 3,
       dadurch gekennzeichnet, daß
    das Plattenmaterial der Längsträger (12, 13) eine Dicke von 3,5 mm hat und die Plattenelemente (9, 10, 11) der Verkleidung eine Dicke zwischen 0,7 und 2,0 mm haben.
  6. Doppelwandiger Kühlcontainer nach einem oder mehreren der Ansprüche 1 bis 5,
       dadurch gekennzeichnet, daß
    die Isolierschicht (4) in dem Containerboden durch Polystyrenschaum gebildet ist, der ein Gewicht von 30 bis 50 kg/m3 hat, und in anderen Teilen des Containers durch Polyurethanschaum mit einem Gewicht von 40 bis 70 kg/m3 gebildet ist.
  7. Doppelwandiger Kühlcontainer nach einem oder mehreren der Ansprüche 1 bis 6,
       dadurch gekennzeichnet, daß
    alle Stoßstellen (9, 17) widerstandsgeschweißt sind.
  8. Doppelwandiger Kühlcontainer nach einem oder mehreren der Ansprüche 1 bis 7,
       dadurch gekennzeichnet, daß
    die Plattenelemente (9, 10, 11, 12, 13) der äußeren Verkleidung durch rostfreies Stahlblechmaterial gebildet sind.
  9. Doppelwandiger Kühlcontainer nach einem oder mehreren der Ansprüche 1 bis 8,
       dadurch gekennzeichnet, daß
    die innere Verkleidung aus Aluminiumblechmaterial gebildet ist.
  10. Doppelwandiger Kühlcontainer nach einem oder mehreren der Ansprüche 1 bis 9,
       dadurch gekennzeichnet, daß
    die Längsstoßstellen zwischen den Innenblechelementen (8, 5) der Boden- und der Seitenwände im Querschnitt ohne scharfe Kanten sind und einen leicht gekrümmten Übergang haben (Fig. 2).
EP95902072A 1993-12-02 1994-12-02 Kühlcontainer Expired - Lifetime EP0730558B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK1347/93 1993-12-02
DK134793 1993-12-02
DK134793A DK134793D0 (da) 1993-12-02 1993-12-02 Koelecontainer
PCT/DK1994/000452 WO1995015289A1 (en) 1993-12-02 1994-12-02 A refrigerated container

Publications (2)

Publication Number Publication Date
EP0730558A1 EP0730558A1 (de) 1996-09-11
EP0730558B1 true EP0730558B1 (de) 1998-07-29

Family

ID=8103854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95902072A Expired - Lifetime EP0730558B1 (de) 1993-12-02 1994-12-02 Kühlcontainer

Country Status (5)

Country Link
EP (1) EP0730558B1 (de)
AU (1) AU1106895A (de)
DE (1) DE69412128T2 (de)
DK (2) DK134793D0 (de)
WO (1) WO1995015289A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105928318A (zh) * 2016-04-29 2016-09-07 威森节能科技（天津）有限公司 一种可移动式自动控温保温箱

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19709521A1 (de) * 1997-03-10 1998-09-17 Metallgesellschaft Ag Container zum Lagern und Verrotten organischer Abfälle
CN1323830C (zh) * 2005-02-01 2007-07-04 林慎谦 不锈钢复底器皿及其激光无缝封闭焊接复底加工方法
DE102006049482B4 (de) * 2006-10-17 2015-09-03 Maersk Container Industry A/S Container-Bodenplatte, insbesondere für einen Kühlcontainer
RU209966U9 (ru) * 2021-12-02 2022-04-19 Олег Валерьевич Воронов Изотермический контейнер

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1804739A1 (de) * 1968-10-23 1970-05-21 Linde Ag Container,vorzugsweise fuer Kuehl- und Gefriergueter
DE2939887C2 (de) * 1979-10-02 1986-03-06 Thyssen Industrie Ag, 4300 Essen Kühlcontainer
EP0029229A1 (de) * 1979-11-15 1981-05-27 Paul Dr. Mader Eine Kante eines eckigen Hohlkörpers, z.B. eines Seefrachtcontainers, bildende Baugruppe
DE8113685U1 (de) * 1981-05-09 1981-09-10 Thyssen Industrie Ag, 4300 Essen Kuehlcontainer
DE8808197U1 (de) * 1988-06-25 1989-10-26 Umformtechnik Hausach GmbH, 7613 Hausach Doppelwandiger Kühlcontainer mit einer eingeschäumten Isolierung
KR950011763B1 (ko) * 1988-11-03 1995-10-10 그라아프 콤만디트게젤샤프트 절연콘테이너의 제조방법
SE9100650L (sv) * 1991-03-05 1992-05-25 Eurotainer Ab Transportbehaallare foer temperaturkaensliga varor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105928318A (zh) * 2016-04-29 2016-09-07 威森节能科技（天津）有限公司 一种可移动式自动控温保温箱

Also Published As

Publication number Publication date
DK134793D0 (da) 1993-12-02
EP0730558A1 (de) 1996-09-11
AU1106895A (en) 1995-06-19
DE69412128T2 (de) 1998-12-24
DK0730558T3 (da) 1999-05-03
WO1995015289A1 (en) 1995-06-08
DE69412128D1 (en) 1998-09-03

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