JP2015155761A - Heat insulation box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulation box having an excellent heat insulation effect and capable of satisfactorily keeping temperature in the box without using a special refrigerant or the like.

SOLUTION: A heat insulation box has a double box structure in which an inner box is contained inside an outer box with a lid via an air gap. A first heat insulation coating film layer is formed on the outer surface and/or the inner surface of the outer box, and a second heat insulation coating film layer is formed on the outer surface and/or the inner surface of the inner box. Between the outer box and the inner box, plural connection parts are provided for connecting the outer box to the inner box. The air gap between the outer box and the inner box is divided longitudinally and laterally by the connection parts and plural sections are formed, so that an air flow between adjacent sections is intercepted.

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a box having a heat shielding property.

  Patent Document 1 discloses a refrigeration (cold insulation) composed of a box body, a heat-insulating coating layer provided on one or both of the inner wall and the outer wall of the box body, and a cooling agent stored in the box body. A box is listed.

JP 2006-214669 A

  However, as in the refrigeration (cold storage) box of Patent Document 1, it is difficult to ensure a sufficient heat shielding effect simply by providing a heat insulating paint layer on the inner wall and outer wall of the box body. Easy to reach inside. Therefore, in the case of the refrigeration (cold) box of Patent Document 1, the cooling effect cannot be maintained for a long time without using a special cooling agent or cooling system with a high cooling effect, so it is difficult to suppress costs. There is also a problem that the versatility is poor.

  The present invention has been made in view of the above circumstances, has an excellent heat shielding effect, and can effectively maintain the temperature in the box without using a special cooling agent or the like. The challenge is to provide a thermal box.

  In order to solve the above problems, the heat shield box of the present invention is a heat shield box having a double box structure in which an inner box is accommodated via a gap inside an outer box provided with a lid, A first thermal barrier coating layer is formed on the outer surface and / or inner surface of the outer box, and a second thermal barrier coating layer is formed on the outer surface and / or inner surface of the inner box. A plurality of connecting portions for connecting the outer box and the inner box are provided between the inner boxes, and this connecting portion allows the gap between the outer box and the inner box to be longitudinally and / or horizontally. A plurality of compartments are formed by being divided, and the air flow between adjacent compartments is blocked.

  In this heat shield box, it is preferable that the outer box and the inner box are made of foamed polystyrene.

  The heat shield box of the present invention has an excellent heat shield effect and can maintain the temperature inside the box well, so that a special cold insulation agent or the like is unnecessary, is inexpensive, and is highly versatile.

It is the isometric view schematic diagram which illustrated one Embodiment of the heat insulation box of this invention. It is a cross-sectional schematic diagram of the heat insulation box shown in FIG. It is a longitudinal cross-sectional schematic diagram of the heat insulation box shown in FIG. It is the isometric view schematic diagram which illustrated another embodiment of the heat insulation box of this invention.

  FIG. 1 is a schematic perspective view illustrating an embodiment of a heat shield box according to the present invention. FIG. 2 is a schematic cross-sectional view of the heat shield box shown in FIG. FIG. 3 is a schematic longitudinal sectional view of the heat shield box shown in FIG.

  As illustrated in FIG. 1 and FIG. 2, the heat shielding box 1 has the inner box 3 accommodated in the outer box 2 having the lid 21 through a gap. Therefore, the heat shield box 1 has a double box structure including the outer box 2 and the inner box 3. Articles to be stored in the heat shielding box 1 can be stored in the inner box 3.

  The materials of the outer box 2 and the inner box 3 are not particularly limited. For example, materials such as polystyrene foam, cardboard, and plastic can be exemplified, but polystyrene is particularly preferable because it is lightweight, inexpensive, and excellent in heat shielding properties. .

  The outer box 2 includes a lid body 21 and a box body 22. The lid 21 is detachably attached to the upper end portion of the box body 22 so that the inside of the outer box 2 can be sealed. As other forms of the lid 21, for example, a box that can be opened and closed with respect to the box body 22 can be exemplified.

  The size of the inner box 3 is slightly smaller than that of the outer box 2, and a gap is formed over the entire circumference between the outer peripheral surface of the inner box 3 and the inner peripheral surface of the outer box 2. . Since the height (vertical length) of the box body 22 of the inner box 3 and that of the outer box 2 are substantially equal, the bottom of the inner box 3 abuts on the bottom of the outer box 2 and the upper end of the inner box 3 Can contact the lid 21 of the outer box 2.

  A plurality of connecting portions 4 that connect the outer box 2 and the inner box 3 are provided between the outer box 2 and the inner box 3. The connecting portion 4 has an elongated shape in the vertical direction, and reaches from the bottom surface of the box body 22 of the outer box 2 to the upper end portion in the gap between the outer box 2 and the inner box 3. For this reason, when the lid body 21 is mounted, the lid body 21 and the upper end portion of the connecting portion 4 come into contact with each other. Therefore, the gap between the outer box 2 and the inner box 3 is divided in the vertical direction (vertical direction) by the connecting portion 4, and a partition S that encloses air is formed between the adjacent connecting portions 4. A plurality of the sections S are formed along the circumferential direction of the heat shield box 1, and the air flow between the adjacent sections S is blocked by the connecting portion 4.

  Furthermore, as illustrated in FIG. 3, a first thermal barrier coating layer 5 is formed on the outer surface and the inner surface of the outer box 2 of the heat shield box 1, and the second surface is formed on the outer surface of the inner box 3. A thermal barrier coating layer 6 is formed.

  The first and second thermal barrier coating layers 5 and 6 can be formed by applying a known thermal barrier coating. Specifically, the thermal barrier paint may be in the form of a water-based paint, an organic solvent-type paint, or a powder paint, but is preferably a liquid paint containing a solvent or a dispersion medium. For example, the thermal barrier coating can include a vehicle, a liquid medium in which the vehicle is dissolved or dispersed, and a metal powder.

  Vehicles include acrylic resins, polyvinyl acetate resins, vinyl chloride resins, vinylidene chloride resins, thermoplastic resins such as thermoplastic elastomers, BR, SBR, NBR, CR, EPDM, rubbers such as fluoro rubber, solvents or dispersions What forms a film when a medium evaporates can be used. In some cases, a thermosetting resin such as a urethane resin composed of a polyol and an isocyanate, a phenol resin, or an epoxy resin can be used.

  It is particularly preferable to use an aqueous emulsion as the vehicle and the liquid medium. Examples of water-based emulsions include acrylic emulsions, silicon acrylic emulsions, urethane emulsions, urethane acrylic emulsions, SBR emulsions, and epoxy emulsions. Inorganic binders such as water glass and colloidal silica are also selected and used depending on the application. be able to.

  The metal powder has heat reflectivity, and examples thereof include titanium, aluminum, gold, silver, indium, copper, and oxides thereof. Although not a metal in a strict sense, in the present invention, a powder such as silica, glass, mica, and talc, which has a metallic glitter layer on the surface and has heat reflectivity, is included in the metal powder. Although the shape of metal powder is not specifically limited, For example, shapes, such as spherical shape and scale shape, can be illustrated. Furthermore, in order to ensure heat insulation, it is preferable that the metal powder is contained in the heat insulation paint in an amount of 20% by mass or more.

  Specifically, as a preferable thermal barrier paint 51, in addition to the thermal barrier effect, it has excellent antibacterial and deodorizing effects. “Blue on Tech” manufactured by High Pressure Gas Industry Co., Ltd. (sales source: n-tech Co., Ltd.) Etc. can be illustrated.

  The thicknesses of the first and second thermal barrier coating layers 5 and 6 to be applied are not particularly limited and can be appropriately designed in consideration of the thermal barrier effect. As a temporary standard, for example, a range of about 10 μm to 400 μm can be exemplified. Moreover, the application method of a thermal barrier paint is not particularly limited, and spraying with a spray or application with a roller can be performed.

  Thus, since the heat shielding box 1 is provided with a plurality of connecting portions 4 that connect the outer box 2 and the inner box 3, the outer box 2 and the inner box 3 are integrated, and the heat shielding box 1 The strength of 1 is improved. Furthermore, the connecting portion 4 divides the gap between the outer box 2 and the inner box 3 to form a plurality of compartments S that contain air. Heat does not easily reach and has excellent heat shielding properties. Moreover, since the air flow is blocked in each section S, the cold insulation effect is further enhanced.

  Furthermore, as illustrated in FIG. 3, in the heat shielding box 1, the outer casing 2 has two first thermal barrier coating layers 5 and the inner box 3 has one second thermal barrier coating layer. Therefore, heat from the outside can be blocked by a total of three thermal barrier coating layers, and the thermal barrier properties are further improved.

  FIG. 4 is a schematic perspective view illustrating another embodiment of the present invention. Portions common to the embodiment described with reference to FIGS. 1 to 3 are denoted by the same reference numerals, and description thereof is omitted below. In FIG. 4, illustration of the lid is omitted.

  In this embodiment, a connecting portion 4 is provided between the outer box 2 and the inner box 3 of the heat shield box 1 over the entire circumference in the vicinity of the center in the vertical direction. The inner box 3 is connected. Therefore, the gap between the outer box 2 and the inner box 3 is divided into upper and lower parts in the horizontal direction (horizontal direction) by the connecting part 4, and a partition S that encloses air is formed vertically by the connecting part 4. Also in this form, since the air flow between the upper and lower compartments S is blocked, the heat shielding property and the cold insulation property are excellent.

  As described above, the heat shield box of the present invention has an excellent heat shield effect and can maintain the temperature inside the box well, so that a special cold insulation agent or a cooling system is not necessary and is inexpensive. Yes, it is universal. The heat shield box of the present invention has a markedly improved heat shield performance compared to conventional foamed polystyrene and the like. For example, a box body that is effective for storing and transporting various articles that require particularly high heat shield properties. Can be suitably used.

  Examples of the use of the heat shield box of the present invention include, for example, putting a fresh food or the like together with a general-purpose cold insulation material (ice) into the inner box of the heat shield box. Thereby, since the heat from the outside can be surely cut off, the temperature inside the heat shielding box can be kept low for a long time, and the freshness of fresh foods and the like is well maintained. Therefore, by using the heat shield box of the present invention, for example, freight that has been transported using a cold truck can be transported by a normal freight vehicle, so that the transportation cost can be cut and transported. Efficiency is improved.

  The heat shield box of the present invention can also be used as a simple refrigerator for home use or business storage.

  The heat shield box of the present invention is not limited to the above embodiment. For example, the shape, number, and arrangement of the connecting portions can be appropriately designed in consideration of the strength and heat shielding properties of the heat shielding box. For example, the connecting portion may have a lattice shape that divides the gap between the outer box and the inner box in the vertical direction and the horizontal direction. Moreover, a space | gap and a connection part may be provided between the outer box and the inner box on the upper side and the lower side of the heat shielding box. Further, the connecting portion may be integral with or separate from the outer box and the inner box.

  The first thermal barrier coating layer of the outer box may be formed on either the inner surface or the outer surface, and the second thermal barrier coating layer of the inner box is on both the inner surface and the outer surface. It may be formed. Therefore, the heat shield box can have a maximum of four heat shield coating layers, and in this case, the heat shield effect is further improved.

  Further, the lid can be freely opened and closed by rotation through a hinge or the like.

EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these Examples at all.
<1> Confirmation experiment of heat insulation effect (1) The confirmation experiment of the heat insulation effect was performed about the heat insulation box of the form illustrated in FIG.

<Example 1>
The thermal barrier coating material was applied to the outer surface of the inner box and the inner surface of the outer box of the foamed thermal barrier box having the double box structure illustrated in FIG.

  As the thermal barrier paint, “Blue on Tech” manufactured by High Pressure Gas Industry Co., Ltd. (sales agency: n-tech Co., Ltd.) was used. This thermal barrier paint has an excellent thermal barrier effect, has an organic substance decomposing action and an antibacterial action due to the blending of titanium oxide and silica, and has an antibacterial effect due to the blending of metal ions and the inorganic fine particles of silver series It is further improved. Since it has such an excellent antibacterial action, it prevents propagation of germs and has a deodorizing effect, so that it becomes a heat shield box that is excellent in terms of hygiene.

<Example 2>
The thermal barrier coating was applied to the outer surface of the inner box and the inner surface and outer surface of the outer casing of the foamed thermal barrier box having the same double box structure as in Example 1 and having a connecting portion. The same heat-shielding paint as in Example 1 was used.

<Comparative Example 1>
A normal polystyrene box that was not provided with a connecting part and was not coated with a thermal barrier paint was used.
(2) 1000 g of ice is put inside each of the heat shielding boxes of Examples 1 and 2 and the foamed polystyrene box of Comparative Example 1 and sealed, and heat from the heater is uniformly applied from the outside (heat insulation). The outside of the cardboard box was heated to approximately 25 ° C., and the amount of ice remaining after a predetermined time elapsed was measured.

<2> Results Table 1 shows the results.

  As shown in Table 1, in the Styrofoam box of Comparative Example 1, 34.8% of ice melted, and there was little remaining ice.

  On the other hand, in the heat shielding box of Example 1, 720 g of ice remained, and the amount of melted ice could be suppressed to 28%. Therefore, it was confirmed that an excellent heat shielding effect was exhibited by the air retained in the compartment formed by the connecting portion and the heat shielding coating applied to the outer surface of the inner box and the inner surface of the outer box.

  Further, in the heat-insulating cardboard of Example 2, more ice remained than Example 1 (726 g). Therefore, it was confirmed that the heat shielding effect is further improved by applying the heat shielding paint to the outer surface of the outer box.

DESCRIPTION OF SYMBOLS 1 Heat-shielding box 2 Outer box 21 Lid 3 Inner box 4 Connection part 5 1st heat-shielding coating-film layer 6 2nd heat-shielding coating-film layer S Section

Claims (2)

A heat shielding box having a double box structure in which an inner box is accommodated via a gap inside an outer box provided with a lid,
The first thermal barrier coating layer is formed on the outer surface and / or inner surface of the outer box, and the second thermal barrier coating layer is formed on the outer surface and / or inner surface of the inner box,
Between the outer box and the inner box, a plurality of connecting portions for connecting the outer box and the inner box are provided, and by this connecting portion, the gap between the outer box and the inner box is longitudinally and / or A heat shielding box, wherein a plurality of compartments are formed by being divided in a transverse direction, and an air flow between adjacent compartments is blocked. The heat shielding box according to claim 1 or 2, wherein the outer box and the inner box are made of foamed polystyrene.

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