JP2007131320A - Heat insulation box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulation box for performing the heat insulation by using a vacuum heat insulating material which is capable of enhancing the heat insulation property. <P>SOLUTION: A plate-like part 19 constituting the heat insulation box has a double metal plate 20 consisting an inner side plate 22 and an outer side plate 23, and a vacuum heat insulating material 25 and a resin foam part 26 arranged on a heat insulation layer arrangement space 27 formed between the double metal plates 20. The inner side plate 22 and the outer side plate 23 have a deformed part 28 and a flat part 29. The vacuum heat insulating material 25 is arranged on the flat part 29, and a vacuum heat insulating material non-arrangement area 45 is formed between the vacuum heat insulating materials 25. The vacuum heat insulating material non-arrangement area 45 of either one metal plate 20 of the inner side plate 22 and the outer side plate 23 and the vacuum heat insulating material 25 arranged on the other metal plate 20 are arranged in an overlapping manner in the thickness direction T. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat insulating box having an inner surface and an outer surface made of a metal plate, and having a heat insulating material between the inner surface and the outer surface of the metal plate.

  When freight is transported using ships, freight trains, etc., cargo is loaded into containers. And in the case of what must be refrigerated or frozen in the case of transportation, the cold storage container (insulation box) for low-temperature transportation is used.

  In the cold storage container, the internal space in which the cargo is loaded can be almost sealed, and a means for maintaining a low temperature environment such as a refrigerator is provided in order to keep the temperature of the internal space at a low temperature. . And the heat insulation layer is provided in the wall, ceiling, etc. of a cold storage container, and it has a structure which can make heat | fever in / out small also when there exists a temperature difference between internal space and the exterior.

The cold container is usually a rectangular parallelepiped box, and a plate-like portion is provided on each surface such as a wall or a ceiling. The structure of this plate-shaped part has a double metal plate, and has a structure in which a heat insulating material is arranged between the double metal plates, and heat is transferred between the internal space and the outside. I try to make the entrance and exit small. This heat insulating material is formed by filling a foamable resin or the like (see, for example, Patent Document 1).
JP 2003-72881 A

  Insulated boxes such as cold storage containers are sometimes stacked with each other during transportation and storage. Therefore, it is necessary not to break even if a predetermined load acts from above. In addition, a larger load may be applied due to vibration during transportation. In addition, when an insulated box such as a cold storage container is loaded onto a ship or freight train or unloaded from a ship or freight train, the container may be damaged by the impact force. It is necessary to have.

  Therefore, in a heat insulating box such as a cold storage container, the double metal plate provided on the wall or ceiling is bent or curved to form a deformed portion so that the metal plate is not easily deformed.

  On the other hand, a vacuum heat insulating material that has a core material that can maintain a void even when compressed and a bag material that wraps the core material, and is produced by vacuuming the inside of the bag material, is particularly excellent in heat insulating properties. It is. And if such a vacuum heat insulating material can be arrange | positioned between double metal plates, the heat insulation of heat insulation boxes, such as a cold storage container, can be improved more.

  The vacuum heat insulating material is a plate-like member. When the vacuum heat insulating material is used for a heat insulating box such as a cold insulation container, it can be considered that the vacuum heat insulating material is disposed between two metal plates. However, as described above, since the deformed portion is provided on the metal plate, a vacuum heat insulating material cannot be attached to such a portion, and there is a possibility that the heat insulating property at the deformed portion is lowered.

  The present invention solves the above-described conventional problems, and insulates using a vacuum heat insulating material, and an object of the present invention is to provide a heat insulating box that can further improve heat insulating properties.

  In order to achieve the above object, the heat insulating box of the present invention is provided with a plate-like portion, and the plate-like portion is arranged in a plane portion using a plurality of vacuum heat insulating materials. A vacuum heat insulating material non-arrangement region is formed between, and the deformed portion is located in the vacuum heat insulating material non-arrangement region, the vacuum heat insulating material non-arrangement region of one of the inner plate and the outer plate, and the other The vacuum heat insulating material arranged on the metal plate is arranged so as to overlap in the thickness direction.

  Thereby, the heat insulation of a plate-shaped part improves and it can make heat | fever in / out small at the time of use of a heat insulation box.

  According to the heat insulation box of the present invention, heat insulation can be performed using a vacuum heat insulating material, and in particular, heat insulation can be improved.

  The invention of the heat insulation box according to claim 1 includes a plate-like portion and an internal space surrounded by the plate-like portion, and the plate-like portion includes a double metal plate including an inner plate and an outer plate. And having a foamed resin portion and a vacuum heat insulating material disposed between the metal plates, the inner space being formed inside the inner plate, and the inner plate and the outer plate being formed using a flat plate. A deformed portion formed by bending or bending, and a plane portion are provided, and a plurality of the vacuum heat insulating materials are used and arranged on the plane portion, A vacuum heat insulating material non-arrangement region is formed between the vacuum heat insulating materials, the deforming portion is located in the vacuum heat insulating material non-arrangement region, and the metal plate of any one of the inner plate and the outer plate The vacuum insulation material non-arrangement region and the other metal plate The vacuum heat insulating material is disposed so as to overlap in the thickness direction, and the vacuum heat insulating material non-arranged region where the vacuum heat insulating material is not disposed is insulated by the vacuum heat insulating material disposed on the other metal plate. Can be prevented.

  The invention of the heat insulating box according to claim 2 is the invention according to claim 1, wherein the deforming portion extends in a predetermined direction, and the extending direction of the deforming portion of the inner plate and the deforming portion of the outer plate. The relationship with the extending direction of the metal plate is parallel, and the vacuum heat insulating material non-arrangement region of one metal plate and the vacuum heat insulating material arranged on the other metal plate overlap in the thickness direction. Easy to arrange.

  The invention of the heat insulation box according to claim 3 is the invention according to claim 1 or 2, wherein the extending direction of the deformed portion of the side plate portion provided on the side surface of the plate portion is the vertical direction. It is characterized by high compressive strength in the vertical direction of the heat insulating box.

  According to a fourth aspect of the present invention, in addition to the first aspect of the present invention, a temperature control device is disposed in the internal space, and the interior space has a predetermined temperature. The temperature of the cargo can be stabilized.

  In the present invention, metal plates are used for the inner plate and the outer plate, but the same effect can be obtained by using a resin plate instead of a metal plate.

  Further, the present invention is a heat insulating box body in which an internal space is formed by a plate-like portion having a foamed resin portion and a vacuum heat insulating material between an inner plate and an outer plate, but between the inner box and the outer box. It may be a heat insulating box having a foamed resin portion and a vacuum heat insulating material.

  Hereinafter, embodiments of the heat insulation box according to the present invention will be described with reference to the drawings. However, the same reference numerals are given to the same configurations as those of the above-described embodiments, and detailed description thereof will be omitted. The present invention is not limited to the embodiments.

  FIG. 1 is a perspective view of a heat insulation box according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the heat insulation box shown in FIG. FIG. 3 is an enlarged cross-sectional view of part B of the heat insulating box shown in FIG. 4A is a perspective view showing a vacuum heat insulating body used in the heat insulating box according to Embodiment 1 of the present invention, FIG. 4B is a cross-sectional perspective view taken along the line CC of FIG. 4A, and FIG. It is a perspective view which shows the state which bent the fin part of the vacuum heat insulating body of (a).

  The heat insulation box 1 in Embodiment 1 of this invention is a rectangular parallelepiped box shape, and has the plate-shaped part 19 as FIG. 1 shows. The plate-like portions 19 are provided on six surfaces and are all rectangular, and are provided with a top plate portion 10 disposed on the upper side, a bottom plate portion 11 disposed on the lower side, and four side plate portions 12. . An internal space 13 that is a space surrounded by the plate-like portion 19 is formed inside. The plate-like portion 19 is fixed to the frame member 30.

  The shapes of the top plate portion 10 and the bottom plate portion 11 are substantially the same, and the long side 15 that is a pair of opposing sides is longer than the short side 16 that is the other two sides, and has an elongated rectangular shape. Moreover, the side-plate part 12 arrange | positioned at the short side 16 side becomes the door part 17 which can be opened and closed, and can be opened and closed as needed. When loading / unloading cargo into / from the internal space 13, the door portion 17 is opened, and when transporting, the door portion 17 is closed. And in the state which closed the door part 17, the internal space 13 becomes substantially sealed shape.

  As shown in FIGS. 1 and 2, a temperature adjusting device 18 is provided in the internal space 13 of the heat insulating box 1. The temperature control device 18 can maintain the temperature in the internal space 13 at a predetermined temperature, and is specifically a refrigerator. And when transporting using the heat insulation box 1, the temperature control apparatus 18 can be operated as needed and the temperature of the internal space 13 can be maintained at predetermined | prescribed temperature.

  As shown in FIG. 3, the structure of the side plate portion 12 includes a double metal plate 20 constituted by an inner plate 22 and an outer plate 23, and a heat insulating layer 21 constituted by a vacuum heat insulating material 25 and a foamed resin portion 26. It is made up of. The heat insulating layer 21 is arranged in a heat insulating layer arrangement space 27 formed between the inner plate 22 and the outer plate 23.

  The inner plate 22 and the outer plate 23 are flat steel plates. As the material of the steel plate, a material having excellent corrosion resistance such as aluminum or stainless steel can be used.

  Further, as shown in FIGS. 1 and 3, the inner plate 22 and the outer plate 23 are formed with linear deformation portions 28 extending in the vertical direction. The deformation part 28 is a part formed by bending, is formed so that the heat insulation layer arrangement space 27 side protrudes, and has a shape in which the outside is recessed. And the part other than the deformation | transformation part 28 becomes the plane part 29 which is planar shape, and the vacuum heat insulating material 25 is adhere | attached on the plane part 29 so that it may mention later. The deformation portion 28 can be formed by pressing or the like. A plurality of deformed portions 28 of the inner plate 22 and the outer plate 23 are formed, respectively, and are arranged in the horizontal direction.

  In addition, the deformation | transformation part 28 can also be formed by a curve other than the method of bending.

  A plurality of the deforming portions 28 are formed so as to have a predetermined interval, and are arranged throughout. Therefore, when a compressive force is applied to the inner plate 22 and the outer plate 23 in the direction (vertical direction) along the deformed portion 28, or when a bending stress is applied in the direction in which the deformed portion 28 is curved, higher strength is obtained. Become.

  The deformation portion 28 of the inner plate 22 and the deformation portion 28 of the outer plate 23 are formed so as to extend in the vertical direction, and these directions are in a parallel relationship. Further, as shown in FIG. 3, the position of the deforming portion 28 is the stacking direction of the metal plates 20 (inner plate 22 and outer plate 23), and the inner side when viewed from the thickness direction T of the side plate portion 12. There is no overlap between the plate 22 and the outer plate 23. And the position of the deformation | transformation part 28 of the inner side board 22 and the position of the deformation | transformation part 28 of the outer side board 23 have shifted | deviated to the direction Y (lateral direction) perpendicular | vertical with respect to the direction where the deformation | transformation part 28 is extended.

  Further, the deforming portion 28 extends in the entire vertical direction, and is in a state of dividing the left and right plane portions 29.

  As shown in FIGS. 4A and 4B, the vacuum heat insulating material 25 covers a core material 43 formed by compression molding a fiber material with outer covering materials 41 and 42 having gas barrier properties. The covered interior is decompressed.

  The jacket materials 41 and 42 are rectangular sheets having a gas barrier layer, a heat-welded layer, and a protective layer. The gas barrier layer is a metal foil such as aluminum or a metal or non-oxide deposited film. The heat-welded layer is formed by laminating a film such as unstretched polypropylene as a heat-welded layer on the inner surface side of the gas barrier layer. The protective layer is a laminate film in which a film such as nylon or polyethylene terephthalate is laminated on the outer surface side of the gas barrier layer.

  The core material 43 can maintain a void even when compressed, and is formed using a fiber material or the like. When the core material 43 is formed using a fiber material, inorganic fibers such as glass wool and glass fiber are preferable. Further, a material other than the fiber material may be used for the core material 43.

  And the vacuum heat insulating material 25 overlaps the jacket materials 41 and 42, heat-welds three sides (three sides), makes one side into an opening shape, inserts the core material 43 in a bag, further opens The opening portion is heated and welded in a state where the inside of the bag is decompressed from the portion and sealed.

  As shown in FIG. 4A, the manufactured vacuum heat insulating material 25 has four fins that are portions that are heated and welded on the sides of the jacket materials 41 and 42 as shown in FIG. Portions 25c, 25d, 25e, and 25f are formed. And as shown in FIG.4 (c), this fin part 25c, 25d, 25e, 25f is return | folded. In addition, what does not fold back this fin part 25c, 25d, 25e, 25f can also be used.

  The vacuum heat insulating material 25 is arrange | positioned at both the inner side board 22 and the outer side board 23, and is being fixed with the adhesive agent. A plurality of vacuum heat insulating materials 25 are used on the respective sides of the inner plate 22 and the outer plate 23. And each vacuum heat insulating material 25 is arrange | positioned at the plane part 29 of the inner side board 22 or the outer side board 23, and is not arrange | positioned at the deformation | transformation part 28. FIG.

  Therefore, the vacuum heat insulating material non-arrangement region 45 is formed between the vacuum heat insulating materials 25 arranged on the respective sides of the inner plate 22 and the outer plate 23. And the deformation | transformation part 28 will be arrange | positioned in this vacuum heat insulating material non-arrangement area | region 45. FIG.

  When the side plate portion 12 is viewed in the thickness direction T, the deformed portion 28 of the inner plate 22 and the deformed portion 28 of the outer plate 23 are shifted from each other. Therefore, the vacuum heat insulating material 25 is not disposed. For this reason, there is a possibility that the heat insulating property of the surroundings may be lowered, but the heat insulating property can be ensured as a whole by the vacuum heat insulating material 25 arranged on the other side.

  That is, a state where the vacuum heat insulating material non-arrangement region 45 of the metal plate 20 of any one of the inner plate 22 and the outer plate 23 and the vacuum heat insulating material 25 disposed on the other metal plate 20 overlap in the thickness direction T. Therefore, it is possible to reduce the heat conduction that moves in the thickness direction T, and the heat insulation can be improved.

  The foamed resin portion 26 is formed using a material that can be foamed and cured while filling a fluid resin, and can be shaped to fit the space that can be filled. As a material used for the foamed resin portion 26, a urethane resin material is used, but other materials may be used.

  The method of forming the side plate portion 12 is as follows.

  First, an adhesive is applied to both the front surface 25 a and the back surface 25 b of the vacuum heat insulating material 25. The type of this adhesive is not limited, but when a urethane resin material is used for the foamed resin portion 26, a urethane-based adhesive layer 50a on the adhesive surface between the surface 25a of the vacuum heat insulating material 25 and the foamed resin portion 26 is used. When an adhesive is used, the adhesion between the surface 25a of the vacuum heat insulating material 25 and the foamed resin portion 26 is good.

  And the vacuum heat insulating material 25 by which the adhesive agent was apply | coated to both surfaces of the surface 25a and the back surface 25b is affixed on the heat insulation layer arrangement | positioning space 27 side of the inner side board 22. FIG.

  Further, as described above, the position where the vacuum heat insulating material 25 is affixed is disposed on the flat surface portion 29 avoiding the deformable portion 28 and provided on both sides of the inner plate 22 and the outer plate 23.

  It should be noted that an adhesive is applied in advance to the inner surface of the inner plate 22 and the outer plate 23 (the surface on the heat insulation layer arrangement space 27 side), so that the space between the foamed resin portion 26 and the inner plate 22 and the outer plate 23 is reduced. The strength of can be made high.

  After attaching the vacuum heat insulating material 25, the inner side board 22 and the outer side board 23 are fixed in the state which becomes a predetermined space | interval. This fixing is performed by welding to the frame member 30 or the like. The foamed resin portion 26 is formed by foaming and curing the heat insulating layer arrangement space 27 formed between the inner plate 22 and the outer plate 23 while filling the fluid resin. When the fluidized resin is filled in the heat insulating layer arrangement space 27, the resin is injected from an injection hole (not shown) provided in the inner plate 22, the outer plate 23, or the like. Then, the injected resin is cured while foaming and is shaped to fit the heat insulation layer arrangement space 27, so that no gap is formed in the heat insulation layer arrangement space 27.

  The structure of the top plate part 10, the bottom plate part 11 and the other side plate part 12 of the heat insulation box 1 of the present embodiment is also the same as that of the side plate part 12 described above, and is manufactured by the same method. Then, the plate-like portion 19 is used to form a box shape, and the internal space 13 is formed. In addition, the deformation | transformation part 28 of the top-plate part 10 or the baseplate part 11 is formed so that it may extend in the direction parallel to the short side 16. FIG.

  Furthermore, the heat regulation box 1 is completed by disposing the temperature control device 18 in the internal space 13 near the side opposite to the side plate portion 12 where the door portion 17 is provided.

  In the heat insulation box 1 of this Embodiment, since the vacuum heat insulating material 25 is arrange | positioned in the heat insulation layer arrangement | positioning space 27 formed between the inner side board 22 and the outer side board 23, it can improve heat insulation. it can. Moreover, since the vacuum heat insulating material 25 is arrange | positioned at the plane part 29 and is not arrange | positioned at the deformation | transformation part 28, although the vacuum heat insulating material non-arrangement area | region 45 is formed, the vacuum heat insulating material 25 arrange | positioned at the other side is added to this Since it is the arrangement which overlaps, heat insulation can be secured.

  In addition, in the heat insulation box 1 of above-described embodiment, all the plate-like parts 19 of the top plate part 10, the bottom plate part 11, and the four side plate parts 12 are provided with the vacuum heat insulating material non-arrangement region 45 and the other side. However, the plate-like portion 19 that employs this structure may be a part of the vacuum heat insulating material 25.

  As described above, the heat insulating box according to the present invention is formed with a vacuum heat insulating material non-arranged region where the vacuum heat insulating material is not arranged, and the vacuum heat insulating material arranged on the other side overlaps this. Therefore, heat insulation can be ensured. Therefore, the present invention can be applied to a cold container for cargo transportation by ship and cargo transportation by rail or road.

The perspective view of the heat insulation box in Embodiment 1 of this invention AA sectional view of FIG. Enlarged sectional view of part B in FIG. (A) is a perspective view which shows the vacuum heat insulating body used for the heat insulation box of Embodiment 1 of this invention, (b) is CC sectional view perspective view of (a), (c) is (a). The perspective view which shows the state which bent the fin part of the vacuum heat insulating body

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat insulation box 12 Side board part 13 Internal space 18 Temperature control device 19 Plate-shaped part 20 Metal plate 22 Inner board 23 Outer board 25 Vacuum heat insulating material 26 Foamed resin part 28 Deformation part 29 Plane part 45 Vacuum heat insulating material non-arrangement area T Thickness direction

Claims (4)

A plate-like portion, and an internal space surrounded by the plate-like portion,
The plate-like portion includes a double metal plate composed of an inner plate and an outer plate, a foamed resin portion and a vacuum heat insulating material disposed between the metal plates, and the internal space is formed inside the inner plate. Is,
The inner plate and the outer plate are formed using a flat plate, provided with a deformed portion formed by bending or bending, and a flat portion,
A plurality of the vacuum heat insulating materials are used and disposed on the flat surface portion, a vacuum heat insulating material non-arrangement region is formed between the vacuum heat insulating materials, and the deformation portion is disposed in the vacuum heat insulating material non-arrangement region. Located
The vacuum heat insulating material non-arrangement region of the metal plate of any one of the inner plate and the outer plate and the vacuum heat insulating material arranged on the other metal plate are arranged to overlap in the thickness direction. A heat insulating box characterized by that.   2. The heat insulation according to claim 1, wherein the deformation portion extends in a predetermined direction, and a relationship between a direction in which the deformation portion of the inner plate extends and a direction in which the deformation portion of the outer plate extends are parallel. Box.   The heat insulating box according to claim 1 or 2, wherein a direction in which the deformed portion of the side plate portion provided on the side surface of the plate portion extends is a vertical direction.   The heat insulation box according to any one of claims 1 to 3, wherein a temperature control device is arranged in the internal space, and the inside space can be controlled to a predetermined temperature.

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