EP0730558A1 - A refrigerated container - Google Patents
A refrigerated containerInfo
- Publication number
- EP0730558A1 EP0730558A1 EP95902072A EP95902072A EP0730558A1 EP 0730558 A1 EP0730558 A1 EP 0730558A1 EP 95902072 A EP95902072 A EP 95902072A EP 95902072 A EP95902072 A EP 95902072A EP 0730558 A1 EP0730558 A1 EP 0730558A1
- 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.)
- Granted
Links
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, sub ⁇ stantially 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.
- EP 0 064 712 Bl discloses a refrigerated container of the type mentioned in the opening paragraph comprising an - 2 -
- the external wall sheets are connected with the upper and lower longitudinal girders and the corner posts by encircling weld seams. As shown in the drawing, the container bottom is supported by under ⁇ lying, 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 3 to 90 kg/m .
- This document exclusively provides teachings for the construction of the floor of the refrigerated container, and thus not for a strong and tight construc ⁇ tion of the entire refrigerated container as such.
- EP 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 longi ⁇ tudinal 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 insig ⁇ nificant part of the internal, effective transport volume of the refrigerated container corresponding to the cor ⁇ rugations 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 con ⁇ tainer 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 refri ⁇ gerated 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 ex ⁇ tended period of use.
- the double-walled refrigerated container of the present invention is characterized in that the lower longitudinal girders are 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 be ⁇ tween side wall and bottom substantially corresponds to or is greater than the thickness of the side wall insulation layer, said transition being free of logitudinal parts in the insulation, that all joints between the sheet members of the inner cladding are all-welded to provide a com ⁇ pletely diffusion-tight, strong and rigid inner shell, and that the sheet members of the outer cladding, which form the bottom face or the sheet members of the lower longitu ⁇ dinal 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 longitu ⁇ dinally 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. Since all joints with the sheet members of the inner cladding are all-welded 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 be ⁇ fore.
- 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 in- sulation. 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 smooth- ly bent shape of the lower longitudinal girder and the downwardly extending corrugations surprisingly ensures that the container can be made free of internal longitu ⁇ dinal profiles extending inside the insulation foam.
- a surprisingly strong and rigid refrigerated container with an optimum insulation capacity, in particular at the bottom and at the transi ⁇ tions between side wall and bottom.
- fig. 1 is a partially sectional view of the refrigerated container of the invention, but on a somewhat incorrectly drawn scale to show the annular insulation layer more clearly,
- fig. 2 is an enlarged sectional view through a lower part of the container at the transition between bottom and side wall,
- fig. 3 is a vertical section through the container gable which comprises the doors,
- fig. 4 is a horizontal section through the same.
- the double-walled refrigerated container 1 shown in fig. 1 comprises an inner cladding 2 of an aluminium sheet mate- rial and an outer cladding 3 of a steel sheet material.
- the refrigerated container 1 moreover comprises an inter ⁇ mediate, 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 more- over 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 ex ⁇ ternal 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-sec ⁇ tion, are evenly and openly bent profiles, such that the thickness of the insulation layer in the transition be ⁇ tween side wall and bottom and between side wall and roof substantially corresponds to or is greater than the thick ⁇ ness of the side wall or roof insulation layer 4.
- a maxi ⁇ mum 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 com ⁇ prise a longitudinal, downwardly protruding slight corru ⁇ gation 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 simul ⁇ taneously "push” any small stones away, without the bottom being deformed.
- the longitudinal corrugation 18 also con ⁇ tributes to the desired stiffening of the transition be- tween bottom and side wall.
- the inner cladding and the outer cladding exclusively comprise sheet members and are sub ⁇ stantially 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 degra ⁇ dation of the insulation material as the known refrige ⁇ rated 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
- 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 here ⁇ by 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 18 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 18. This ensures particularly reliable sealing of the doors 18.
- 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)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK1347/93 | 1993-12-02 | ||
DK134793 | 1993-12-02 | ||
DK134793A DK134793D0 (en) | 1993-12-02 | 1993-12-02 | COOLING CONTAINER |
PCT/DK1994/000452 WO1995015289A1 (en) | 1993-12-02 | 1994-12-02 | A refrigerated container |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0730558A1 true EP0730558A1 (en) | 1996-09-11 |
EP0730558B1 EP0730558B1 (en) | 1998-07-29 |
Family
ID=8103854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95902072A Expired - Lifetime EP0730558B1 (en) | 1993-12-02 | 1994-12-02 | A refrigerated container |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0730558B1 (en) |
AU (1) | AU1106895A (en) |
DE (1) | DE69412128T2 (en) |
DK (2) | DK134793D0 (en) |
WO (1) | WO1995015289A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU209966U1 (en) * | 2021-12-02 | 2022-03-24 | Олег Валерьевич Воронов | Isothermal container |
RU213452U1 (en) * | 2022-08-24 | 2022-09-13 | Акционерное общество "Рузаевский завод химического машиностроения" (АО "Рузхиммаш") | ISOTHERMAL CONTAINER |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19709521A1 (en) * | 1997-03-10 | 1998-09-17 | Metallgesellschaft Ag | Containers for storing and rotting organic waste |
CN1323830C (en) * | 2005-02-01 | 2007-07-04 | 林慎谦 | Stainless steel double bottom utensil and its laser seamless closing welding double bottom processing method |
DE102006049482B4 (en) * | 2006-10-17 | 2015-09-03 | Maersk Container Industry A/S | Container bottom plate, in particular for a refrigerated container |
CN105928318A (en) * | 2016-04-29 | 2016-09-07 | 威森节能科技(天津)有限公司 | Movable automatic temperature control insulation box |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1804739A1 (en) * | 1968-10-23 | 1970-05-21 | Linde Ag | Container, preferably for refrigerated and frozen goods |
DE2939887C2 (en) * | 1979-10-02 | 1986-03-06 | Thyssen Industrie Ag, 4300 Essen | Reefer container |
EP0029229A1 (en) * | 1979-11-15 | 1981-05-27 | Paul Dr. Mader | Construction unit constituting the edge of a cornered hollow body, e.g. a sea-load container |
DE8113685U1 (en) * | 1981-05-09 | 1981-09-10 | Thyssen Industrie Ag, 4300 Essen | COOLING CONTAINER |
DE8808197U1 (en) * | 1988-06-25 | 1989-10-26 | Umformtechnik Hausach GmbH, 7613 Hausach | Double-walled refrigerated container with foamed insulation |
KR950011763B1 (en) * | 1988-11-03 | 1995-10-10 | 그라아프 콤만디트게젤샤프트 | Method for producing an insulating container |
SE9100650L (en) * | 1991-03-05 | 1992-05-25 | Eurotainer Ab | TRANSPORT CONTAINERS FOR TEMPERATURE-SENSITIVE GOODS |
-
1993
- 1993-12-02 DK DK134793A patent/DK134793D0/en not_active Application Discontinuation
-
1994
- 1994-12-02 DK DK95902072T patent/DK0730558T3/en active
- 1994-12-02 DE DE69412128T patent/DE69412128T2/en not_active Expired - Fee Related
- 1994-12-02 AU AU11068/95A patent/AU1106895A/en not_active Abandoned
- 1994-12-02 EP EP95902072A patent/EP0730558B1/en not_active Expired - Lifetime
- 1994-12-02 WO PCT/DK1994/000452 patent/WO1995015289A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9515289A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU209966U1 (en) * | 2021-12-02 | 2022-03-24 | Олег Валерьевич Воронов | Isothermal container |
RU209966U9 (en) * | 2021-12-02 | 2022-04-19 | Олег Валерьевич Воронов | Isothermal container |
RU213452U1 (en) * | 2022-08-24 | 2022-09-13 | Акционерное общество "Рузаевский завод химического машиностроения" (АО "Рузхиммаш") | ISOTHERMAL CONTAINER |
Also Published As
Publication number | Publication date |
---|---|
DK134793D0 (en) | 1993-12-02 |
AU1106895A (en) | 1995-06-19 |
EP0730558B1 (en) | 1998-07-29 |
DE69412128T2 (en) | 1998-12-24 |
DK0730558T3 (en) | 1999-05-03 |
WO1995015289A1 (en) | 1995-06-08 |
DE69412128D1 (en) | 1998-09-03 |
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