Insulated and cold containers

Abstract

To improve a heat-insulating property.SOLUTION: A heat and cold insulation container 10 comprises a plurality of heat insulators 12, and a plurality of heat insulation sheets 14 each arranged between the heat insulators 12, 12. A heat conductivity coefficient of the heat insulation sheet 14 is lower than that of the heat insulator 12. Further, the heat insulation sheet 14 is softer than the heat insulator 12. The one including a composite material in which an inside of a continuous bubble resin foam is filled with aerogel is used as such a heat insulation sheet 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a heat and cold insulation container. [Background technology]

[0002] Insulated containers that store food and other items in a warm or cold state have been proposed (see, for example, Patent Document 1). The insulated container in Patent Document 1 has panels that are configured into a box shape by attaching sponge packing to uneven sections provided on the edges of the panels and combining the uneven sections with the sponge packing in between. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4657046 Summary of the Invention [Problem to be solved by the invention]

[0004] Insulated containers are required to have higher insulating performance.

[0005] The present invention has been proposed in view of the above-mentioned problems associated with the prior art, in order to suitably solve these problems, and has an object to provide a hot / cold insulation container having good thermal insulation performance. [Means for solving the problem]

[0006] The thermal insulation / cold insulation container according to the present disclosure comprises: Multiple insulation materials; and a heat insulating sheet disposed between the heat insulating materials, The gist is that the thermal conductivity of the heat insulating sheet is lower than that of the heat insulating material. [Effects of the Invention]

[0007] The heat and cold insulation container according to the present invention has good heat insulating properties. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a heat / cold insulation container according to an embodiment of the present invention, with the lid portion in a closed state. [Figure 2] 1 is a perspective view showing a thermal insulation / cold insulation container of an embodiment with the lid part open. [Figure 3] FIG. 2 is a vertical cross-sectional view showing the heat and cold insulation container of the embodiment. [Figure 4] FIG. 2 is a cross-sectional view showing the heat and cold insulation container of the embodiment. [Figure 5] FIG. 2 is an exploded perspective view of the heat and cold insulation container of the embodiment. [Figure 6] FIG. 10 is a cross-sectional view of a main part showing another example of the arrangement of the heat insulating sheet. DETAILED DESCRIPTION OF THE INVENTION

[0009] Next, a preferred embodiment of the heat and cold insulation container according to the present invention will be described below with reference to the accompanying drawings. [Example]

[0010] As shown in Figures 1 and 2, a hot / cold insulation container 10 according to this embodiment includes a thermal insulator 12 and a thermal insulating sheet 14 disposed between the thermal insulators 12. In the hot / cold insulation container 10, a container body 16 for storing items is configured in a box shape by combining the thermal insulator 12 and the thermal insulating sheet 14. In the hot / cold insulation container 10, a lid 18 for opening and closing an opening 16a of the container body 16 is also configured with the thermal insulator 12.

[0011] As shown in FIG. 5, the insulating material 12 is plate-shaped. The insulating material 12 can be a urethane-based foam such as polyurethane foam or polyisocyanurate foam. The insulating material 12 may also be a styrene-based foam such as polystyrene foam, typified by EPS or XPS. The foam is preferably a rigid foam. The insulating material 12 may also be a combination of a foam and a paper surface material such as aluminum kraft paper or calcium carbonate paper, or an aluminum-deposited resin sheet. The thermal conductivity of the insulating material 12 is preferably 0.024 w / m·k or less. The thermal conductivity of the insulating material 12 is more preferably 0.022 w / m·k or less. In the example, the low-thermal-conductivity insulating material 12 was manufactured by Inoac Corporation under the trade name "Thermax."

[0012] As shown in FIG. 5, the heat insulating sheet 14 is strip-shaped and thinner than the heat insulating material 12. The heat insulating sheet 14 has a lower thermal conductivity than the heat insulating material 12. An example of such a heat insulating sheet 14 is one that contains a composite material in which an open-cell resin foam is filled with aerogel. The heat insulating sheet 14 preferably has a thermal conductivity of 0.020 w / m·k or less, more preferably 0.018 w / m·k or less, and even more preferably 0.016 w / m·k or less. The heat insulating sheet 14 is more flexible than the heat insulating material 12.

[0013] The open-cell foam of the composite preferably has a foam layer having open cells and an impermeable skin layer formed on the surface of the foam layer. The open-cell foam preferably has an average diameter of 10 μm or less of the interconnected pores between the open cells. The open-cell foam is obtained by supercritical foam molding. The open-cell foam can be obtained by adding an elastomer or rubber component and a specific surfactant. The open-cell foam is extruded and cut into a predetermined shape while leaving the skin layer intact, exposing the open-cell structure of the cells on the cut surface. The aerogel raw material solution is then impregnated through the exposed cells. For the impregnation, vacuum injection technology can be used to efficiently impregnate the open-cell foam through the open cells exposed on the cut surface while leaving the skin layer intact. The raw material solution is then gelled to form a wet gel, and the solvent is removed from the wet gel to obtain an aerogel-filled composite. The presence of a skin layer in the open-cell foam prevents the aerogel from being exposed on the surface of the open-cell foam, thereby suppressing powder shedding. It also facilitates filling the interior of the open-cell foam with aerogel. Alternatively, a portion of the non-permeable skin layer formed on the surface of the foam layer may be peeled off to expose the open-cell structure on the surface, and the raw material solution for the aerogel may be impregnated and injected through these exposed open cells.

[0014] As shown in Figures 1 to 4, each surface of the container body 16 is made of a heat insulating material 12. An insulating sheet 14 is sandwiched between adjacent pieces of heat insulating material 12. In this way, adjacent pieces of heat insulating material 12 are not in contact with each other in the container body 16. Here, the container body 16 can be constructed by connecting the outer surfaces of adjacent pieces of heat insulating material 12 with a tape or the like across the heat insulating sheet 14. In this embodiment, the heat insulating material 12 and the heat insulating sheet 14 are not bonded to each other with an adhesive. Only the heat insulating sheet 14 is interposed between the heat insulating materials 12. The heat insulating material 12 and the heat insulating sheet 14 may also be bonded together.

[0015] As shown in Figure 2, the lid 18 of the embodiment is composed of one piece of insulating material 12. An insulating sheet 14 is placed on the edge of the opening 16a in the container body 16. When the lid 18 is closed, the insulating sheet 14 is sandwiched between the insulating material 12 of the lid 18 and the insulating material 12 of the container body 16 (see Figure 1).

[0016] According to the heat and cold insulation container 10 of the embodiment, by disposing the insulating sheet 14, which has a lower thermal conductivity than the insulating material 12, between the insulating materials 12, it is possible to prevent heat from entering or leaving between the insulating materials 12. This improves the insulating performance of the heat and cold insulation container 10. Here, by using as the insulating sheet 14 a composite material in which an aerogel is filled inside an open-cell resin foam, it is possible to improve the insulating performance of the heat and cold insulation container 10. Furthermore, by covering the end faces of the insulating material 12 with the insulating sheet 14, it is possible to prevent powder from falling off from the end faces of the insulating material 12.

[0017] According to the thermal insulation / cold insulation container 10 of the embodiment, by disposing the insulating sheet 14, which is softer than the insulating material 12, between the insulating materials 12, the sealing performance between the insulating materials 12 is improved. This improves the airtightness of the thermal insulation / cold insulation container 10. In addition, the impact resistance of the thermal insulation / cold insulation container 10 is also improved.

[0018] (Example of change) The present invention is not limited to the above-mentioned items, but may be, for example, as follows: Note that the present invention is not limited to the specific descriptions of the examples and the following modified examples. (1) The shape of the container is not limited to that of the embodiment, and may be any polygon other than a circle or a square. (2) The shape of the heat insulating material is not limited to a flat plate shape, but may be, for example, an "L" shape that forms two sides of the container. (3) The container may be constructed by combining the insulating materials with an insulating sheet sandwiched therebetween and then placing the insulating materials in an outer packaging material such as a resin sheet. (4) The container body or lid may be constructed by stacking multiple sheets of insulating material. For example, the lid 32 of the container 30 shown in Fig. 6 is constructed by stacking two sheets of insulating material 12. The lower insulating material 12, which is formed to fit the opening 16a of the container body 16, is designed to fit inside the opening 16a when the lid 32 is closed. (5) The insulating sheet may be placed on the lid, or on both the container body and the lid. For example, in the container 30 shown in Fig. 6, the insulating sheet 14 is placed on the outer edge of the insulating material 12 on the upper side of the lid 32. When the lid 32 is closed, the insulating sheet 14 is sandwiched between the insulating material 12 on the lid 32 and the insulating material 12 on the container body 16. [Explanation of symbols]

[0019] 10. Insulation container, 12. Heat insulating material, 14. Heat insulating sheet

Claims

1. A heat and cold insulation container in which a plurality of plate-shaped insulating materials are assembled into a box shape, A heat insulating sheet is disposed between the end face of one of the adjacent heat insulating materials and the other of the adjacent heat insulating materials, The thermal conductivity of the heat insulating sheet is lower than that of the heat insulating material. A heat-insulating and cold-insulating container.

2. 2. The heat-insulating / cold-insulating container according to claim 1, wherein the heat-insulating sheet contains a composite material in which an aerogel is filled inside an open-cell resin foam.

3. 3. The heat and cold insulation container according to claim 1, wherein the heat insulating sheet is more flexible than the heat insulating material.

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