JP5624305B2 - Insulated container - Google Patents

Description

  The present invention relates to a heat insulating container. In this invention, the heat insulating container means an enclosure including a container or a tube which is insulated by a vacuum heat insulating material and is suitable for use in hot and cold equipment.

  Conventionally, in order to provide a hot water storage tank with high practicality by more effectively suppressing the amount of leakage heat at a low cost, the heat insulating material disposed between the container and the outer case is at least a vacuum heat insulating material and a sheet-like heat insulating material. The side surface of the container and the side surface of the outer case are close to each other and the space is narrow, and at least a vacuum heat insulating material is arranged, and only the sheet-like heat insulating material is used for the wide space interval. A hot water storage tank has been proposed (see, for example, Patent Document 1).

JP 2005-226965 A

  However, in such a conventional hot water storage tank, the vacuum heat insulating material and the normal plate-shaped non-vacuum heat insulating material are separate members, and the non-vacuum heat insulating material is attached after the vacuum heat insulating material is attached to the tank. There was a high possibility that the outer cover material of the vacuum heat insulating material already attached during the work of attaching the plate heat insulating material was damaged. Further, when the outer skin material is damaged after the vacuum heat insulating material is once disposed such as the device manufacturing line process other than the heat insulation and the device maintenance work, the once installed vacuum heat insulating material has to be replaced. Furthermore, since a plurality of vacuum heat insulating materials and non-vacuum heat insulating materials are used individually, the number of parts at the time of mounting is large, and the mounting work is complicated. As a result, when vacuum insulation is applied, there are problems such as poor productivity.

  Accordingly, an object of the present invention is to improve the reliability of a vacuum heat insulating material, to provide a heat insulating container having high productivity and excellent heat insulating performance.

  The heat insulation container according to the present invention is a heat insulation container comprising a container and a plurality of heat insulation members that cover at least one of the vacuum heat insulation members and cover substantially all outer surfaces of the container in cooperation with each other. A vacuum heat insulating member covers a vacuum insulating element having a core material and a vacuum envelope that seals the core material in a vacuum, a heat insulating element combined with the vacuum heat insulating element, and the vacuum heat insulating element and the heat insulating element together. It is the heat insulation container provided with the outer skin.

  In the heat insulating container of the present invention, the vacuum heat insulating element is formed by combining the vacuum heat insulating element with another non-vacuum or low vacuum degree heat insulating element and covering the whole with the outer skin, so that the vacuum heat insulating element includes the inner skin and the outer skin. The vacuum insulation is not easily destroyed, the number of parts during assembly work can be reduced, and work efficiency can be improved.

It is a schematic perspective view which shows the heat insulation container by Embodiment 1 of this invention. It is a schematic horizontal sectional view of the heat insulation container along line AA of FIG. It is a schematic perspective view which shows the vacuum heat insulation member which covers the side wall of the container wall of the heat insulation container of FIG. It is a schematic perspective view of the heat insulation member which covers the end wall of the container wall of the heat insulation container of FIG. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 2 of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 3 of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 4 of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 5 of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 6 of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 7 of this invention. It is a general | schematic vertical sectional view which shows the heat insulation container of FIG. It is a table | surface which shows the performance of the heat insulating material which can be used for the heat insulation container of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 8 of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 9 of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 10 of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 11 of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of FIG. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 12 of this invention. It is a general | schematic horizontal sectional view which shows the heat insulation container of Embodiment 13 of this invention.

  Embodiments of the present invention will be described below.

Embodiment 1 FIG.
In FIGS. 1-4, the heat insulation container 1 in Embodiment 1 for implementing this invention is shown. The heat insulating container 1 is an enclosure including a container and a tube suitable for use in hot or cold equipment.

  The heat insulating container 1 includes a cylindrical container 2 and a plurality of panel-shaped heat insulating members 3 that cover substantially all the outer surfaces of the container 2 in cooperation with each other, and at least one of the heat insulating members 3 includes A vacuum heat insulating member 4 is used. In the illustrated example, the container 2 includes a cylindrical side wall 5 that forms a cylindrical body, and upper and lower end walls 6 that close the top and bottom of the body, and the side wall 5 includes four panels. The end wall 6 is covered with a dome-shaped non-vacuum heat insulating member 7. That is, the plurality of heat insulating members 3 of the heat insulating container 1 are configured by a vacuum heat insulating member 4 that covers the side wall 5 of the container 2 and a non-vacuum heat insulating member 7 that covers the end wall 6. The heat insulating members 3 are installed by being joined to each other with an adhesive tape or the like, or tied with a fastening tool or the like from the outer periphery.

  The four vacuum heat insulating members 4 have the same structure, and a vacuum heat insulating element 10 having a core material 8 and a vacuum skin 9 for sealing the core material 8 in a vacuum, and a combination of the vacuum heat insulating element 10 and the vacuum heat insulating element 10. And a skin 12 that covers the vacuum heat insulating element 10 and the heat insulating element 11 together in a combined state.

  In the illustrated example, the heat insulating element 11 is a plate-shaped non-vacuum heat insulating material 13 that is curved in a shape along the side wall 5 so as to cover 1/4 of the side wall 5 of the container 2. EPS) Insulating material. The non-vacuum heat insulating material 13 is produced by selecting a sphere having an appropriate diameter from a spherical polystyrene resin having a diameter of about 0.3 to 2 mm, and adding a hydrocarbon-based foaming agent to the sphere and performing foam molding in a polymerization process. can do.

  A groove 14 is formed in the axial direction in the circumferential center of the outer surface of the heat insulating element 11, that is, the non-vacuum heat insulating material 13, and the vacuum heat insulating element 10 is embedded in the groove 14. As shown in FIG. 2, the vacuum heat insulating element 10 has a rectangular flat plate shape, and is partially formed in the heat insulating element 11 so that the outer main surface is flush with the outer surface of the heat insulating element 11. Embedded, for example, the outer periphery is joined by an adhesive tape, a fastening tool, or the like, and the vacuum heat insulating element 10 is connected to the outside of the heat insulating element 11 when viewed in the thickness direction of the side wall 5 of the container 2. Has been placed.

  Each of the vacuum heat insulating elements 10 includes a glass fiber sheet core 8 and a film-like vacuum envelope 9 that seals the core 8 in a vacuum. In the production of the fiber sheet to be the core material 8, for example, glass fibers are dispersed in water or sulfuric acid, and the paper sheet is formed by an automatic feed type paper machine to be formed into a sheet shape, and then wound into a roll shape through a drying process. A sheet roll is produced. Next, the sheet is pulled out from the sheet roll and cut into a required size to obtain a fiber sheet, and a core material 8 in which a plurality of the fiber sheets are stacked is produced. After that, the core material 8 is inserted into a bag-like vacuum envelope 9 produced by folding two or one core material, and the core material 8 covered with the vacuum envelope 9 is placed in the vacuum chamber. After that, by reducing the pressure in the vacuum chamber, the space covered with the vacuum envelope 9 is reduced to make the space vacuum. Then, after the remaining opening of the vacuum envelope 9 is sealed in a state where the space covered with the vacuum envelope 9 is at a predetermined pressure, for example, a vacuum pressure of about 0.1 to 3 Pa, the pressure in the vacuum chamber is reduced. Return to atmospheric pressure. Thereby, the vacuum heat insulation element 10 is completed. The interior space of the completed vacuum heat insulating element 10 is kept in a vacuum state. Further, an appropriate gas adsorbent is inserted into the space covered with the vacuum envelope 9 as necessary before sealing.

  In addition, about the water | moisture content contained in a fiber sheet, you may remove a water | moisture content, heating a fiber sheet before vacuuming etc. separately from the drying process at the time of papermaking. In addition, in a state where the core 8 covered with the vacuum envelope 9 is decompressed in the vacuum chamber, a mechanism for heating the inside of the vacuum chamber is provided so that the fiber sheet itself has a thermal load such as thermal contraction or thermal decomposition. The moisture of the fiber sheet may be removed by setting appropriate conditions such as a pressure that does not induce a vacuum discharge and the like at a low temperature.

  The vacuum skin 9 is made of, for example, an aluminum laminate sheet. A typical film layer is made of nylon 15 μm + polyethylene terephthalate 12 μm + aluminum sheet 6 μm + polyethylene 50 μm. However, it is not limited to this. In FIG. 2, the thicknesses of the vacuum endothelium 9 and the non-vacuum outer skin 12 are drawn with emphasis so that the structure can be easily understood.

  In this embodiment, glass fiber is used as the fiber material, but polyester-based or other organic fibers such as polypropylene, polystyrene, polyethylene, polyethylene terephthalate, or the like can also be used. Further, it is clear that the same effect can be obtained even if inorganic fibers and organic fibers are mixed, and it is possible to appropriately select a fiber material from the viewpoint of the manufacturing method and cost suitable for each.

  The outer skin 12 that covers the vacuum heat insulating element 10 and the heat insulating element 11 in a combined state is made of, for example, a polyester (PE) sheet, a polyethylene terephthalate (PETT) sheet, or a polypropylene (PP) sheet. In the illustrated example, it is a non-vacuum skin, but it can also be vacuum sealed.

  The heat insulating container 1 further includes an outer package 15 that is a box-shaped case for storing the container 2, and the vacuum heat insulating member 4 is disposed between the container 2 and the outer package 15. In the example shown in the figure, the entire periphery of the side wall 5 of the container 2 is covered with the vacuum heat insulating member 4, but the portion where the container 2 is particularly small in distance from the outer surface 15 to the facing surface, that is, the periphery of the vacuum heat insulating member 4. The vacuum heat insulating elements 10 are arranged at four locations in the direction.

  In the heat insulating container 1 having such a configuration, a vacuum heat insulating member 4 as a combined heat insulating material in which the vacuum heat insulating element 10 and the heat insulating element 11 are integrated is prepared, and the vacuum heat insulating member 4 is attached to the container 2. it can. Therefore, it is possible to attach an assembly that has been assembled as a unit to the container 2 at once, by attaching the heat insulating material corresponding to the heat insulating element 11 to the container 2 and attaching the vacuum heat insulating material 4 thereafter. is there. Therefore, the number of parts in the assembly process is reduced by half, and the working efficiency is improved. Further, since the surface of the vacuum heat insulating element 10 is covered with the outer skin 12 during the mounting operation, the vacuum outer skin 9 of the vacuum heat insulating element 10 is protected, and damage to the vacuum outer skin 9 during line assembly can be prevented. In the figure, the non-vacuum skin 12 is depicted and described as covering the entire surface of the combined vacuum insulation element 10 and non-vacuum insulation element 11, but this is not necessarily the case. It is not a thing.

Embodiment 2. FIG.
In the heat insulating container 1 shown in FIG. 5, the exterior 15 has a cylindrical shape, and the eight vacuum heat insulating members 4 are arranged so as to cover the side wall of the cylindrical container 2. Other configurations are the same as those shown in FIGS. 1 to 4, but in FIG. 5, the vacuum outer skin 9 and the outer skin 12 are represented by a single line.

  In this heat insulating container 1, although there are eight vacuum heat insulating members 4 covering the side walls of the container 2, there is no extra space between the vacuum heat insulating member 4 and the exterior 15. Small and compact. Moreover, since the surface area of the exterior 15 is reduced, the material of the exterior 15 is reduced, the heat transfer area with the outside air is reduced, and the heat insulation performance can be improved.

Embodiment 3 FIG.
In the heat insulating container 1 shown in FIG. 6, the side wall of the container 2 is covered with two vacuum heat insulating members 4 having a substantially C-shaped cross section. The vacuum heat insulating member 4 is disposed along the cylindrical side wall of the container 2 and has a constant thickness and a C-shaped heat insulating element 11. The vacuum heat insulating member 4 is joined to the outer peripheral surface of the heat insulating element 11. A vacuum heat insulating element 10 which is arranged outside the heat insulating element 11 when viewed in the thickness direction and has a constant thickness and a C-shaped cross section, and an outer skin 12 which surrounds the heat insulating element 11 and the vacuum heat insulating element 10 in combination. It has. Other configurations are the same as those described above. The heat insulating element 11 is a non-vacuum heat insulating material 13.

  In this heat insulating container, since the vacuum heat insulating member 4 is divided into two parts, the number of parts is small and the number of joints between the vacuum heat insulating members 4 is also small. Therefore, a heat insulating container with high heat insulating performance for heat insulation or cold insulation and the like. Can be realized. Further, when, for example, glass wool having flexibility is applied as the non-vacuum heat insulating material 13 of the heat insulating element 11, it is possible to absorb a gap generated due to a difference in curvature between the inner surface of the vacuum heat insulating element 10 and the outer surface of the container 2. It becomes possible. Therefore, higher performance heat insulation performance can be realized.

  Note that the cylindrical vacuum heat insulating element 10 in this embodiment is, for example, as described above, first producing a flat plate vacuum heat insulating material and then a cylindrical shape having a desired curvature with a triaxial roll bender. Bending was performed so that Note that it may be formed into a cylindrical shape in advance before vacuum sealing in the vacuum chamber.

Embodiment 4 FIG.
In the heat insulating container 1 shown in FIG. 7, the side wall of the container 2 is covered with two vacuum heat insulating members 4 having a substantially C-shaped cross section, and this is the same as the heat insulating container 1 shown in FIG. A vacuum heat insulating element 10 is provided inside the heat insulating member 4 in the radial direction, and a heat insulating element 11 is provided outside. That is, the vacuum heat insulating member 4 is disposed along the cylindrical side wall of the container 2 and bonded to the vacuum heat insulating element 10 having a constant thickness and a C-shaped cross section and the outer peripheral surface of the vacuum heat insulating element 10. 2 is disposed outside the vacuum heat insulating element 10 when viewed in the thickness direction of the side wall, and is surrounded by a combination of the heat insulating element 11 having a constant thickness and a C-shaped cross section, and the vacuum heat insulating element 10 and the heat insulating element 11. And an outer skin 12 to be provided. Other configurations are the same as those described above, and the heat insulating element 11 is a non-vacuum heat insulating material 13.

  In the heat insulation container 1 shown in FIG. 7, since the effect equivalent to the heat insulation container 1 of FIG. 6 is acquired, since it installs so that the outer peripheral part of the vacuum heat insulation element 10 may cover all the heat insulation elements 11, at the time of manufacture Once placed in the container 2, the vacuum heat insulating element 10 does not come out on the surface, so that the risk of damaging the vacuum skin 9 is reduced.

Embodiment 5. FIG.
In the heat insulating container 1 shown in FIG. 8, since the container 2 is a rectangular parallelepiped and the side wall 5 is a flat plate shape, and the exterior 15 is also a rectangular parallelepiped, the vacuum heat insulating member 4 has a rectangular flat plate shape. A heat insulating element 11 is provided in contact with the container 2 on the inner side when viewed in the thickness direction of the side wall 5 of the container 2, and a vacuum heat insulating element 10 is provided on the outer side. The heat insulating element 11 is a non-vacuum heat insulating material 13. In this case, since it is not necessary to process the vacuum heat insulating element 10 into a cylindrical shape, there is no bending load on the core material 8 and the vacuum skin 9. That is, since the vacuum skin 9 is not damaged and the core material 8 is not bent, a highly reliable heat insulating structure can be realized. In this embodiment, at least one side wall 5 or upper lid or lower lid (not shown) of the outer wall of the exterior 15 and the container 2 can be opened and closed together with the vacuum heat insulating member 4. Other configurations are the same as those of the above-described embodiment.

Embodiment 6 FIG.
The heat insulating container 1 shown in FIG. 9 has the same configuration as that of the heat insulating container 1 shown in FIG. The difference is that a heat insulating element 10 is provided and a heat insulating element 11 is provided outside. Also in this heat insulation container 1, the effect similar to what is shown in FIG. 8 is acquired, and since the vacuum heat insulation element 10 exists inside the heat insulation element 11, it is protected by the heat insulation element 11.

  In this embodiment, an EPS heat insulating material is used as the material of the heat insulating material. However, for example, a foamed urethane heat insulating material or an extruded polystyrene foam may be used, and an inorganic heat insulating material such as glass wool heat insulating material or ceramic wool may be used. A heat insulating material or the like may be used.

Embodiment 7 FIG.
In the heat insulating container 1 shown in FIGS. 10 and 11, the cylindrical container wall 5 is covered with two semi-cylindrical vacuum heat insulating members 16 divided into two in the axial direction so as to have a substantially C-shaped cross section. The end wall 6 of the container 2 is also covered with a dome-shaped second vacuum heat insulating member 17, and the heat insulating member 3 surrounding the container 2 is entirely composed of a vacuum heat insulating panel.

  The side wall 5 of the container 2 is covered with two semi-cylindrical vacuum heat insulating members 16, and each vacuum heat insulating member 16 includes a vacuum heat insulating element 10 that covers about ¼ of the side wall 5 of the container 2, and a vacuum. The heat insulating element 20 combined with the heat insulating element 10 as a member extending in the circumferential direction to cover the remaining 1/4 of the side wall 5 and the vacuum heat insulating element 10 and the heat insulating element 20 combined with each other are vacuum sealed. It consists of a second vacuum skin 19 that stops. Here, the heat insulating element 20 is the second core member 18. The vacuum heat insulating element 10 includes a core material 8 and a vacuum outer skin 9 that vacuum seals the core material 8.

  Therefore, the vacuum heat insulating member 16 includes the second core member 18 that is the heat insulating element 20 combined with the vacuum heat insulating element 10, and is vacuum-sealed by being covered with the vacuum skin 19. The degree of vacuum in the space surrounding the second core member 18 combined with the vacuum heat insulating element 10 is set to a second vacuum level lower than the vacuum degree of the vacuum heat insulating element 10. Further, the vacuum heat insulating element 10 and the second core member 18 are arranged continuously in the circumferential direction along the side wall 5 of the container 2. Moreover, the 2nd core material 18 can use the foam heat insulating material foamed with the hydrocarbon type foaming agent.

  Unlike the vacuum heat insulating member 16 that covers the side wall 5 of the container 2 described above, the end wall 6 of the container 2 is dome-shaped and has the same vacuum level as the second vacuum degree in the vacuum envelope 19 of the vacuum heat insulating member 16. Covered by the second vacuum heat insulating member 17. The second vacuum heat insulating member 17 is obtained by covering a third core member 21 that is a heat insulating element 24 with a third vacuum skin 22. As described above, as the third core material 21 of the second vacuum heat insulating member 17, the foam heat insulating material foamed with the hydrocarbon-based foaming agent can be used as the core material.

  The above-mentioned second core material 18 is, for example, an EPS heat insulating material, and the vacuum envelope 19 is a high-density polyethylene sheet. The second vacuum heat insulating member 17 is also an EPS heat insulating material, and the vacuum outer skin 22 is a high density polyethylene sheet.

  Therefore, the table of FIG. 12 shows the results of examining the relationship between the rate of change in thickness and the thermal conductivity when the sealing condition is changed using PE packaging material with a 10 mm thick EPS heat insulating material and the pressure as a parameter. When the thermal conductivity of the EPS heat insulating material, which was 0.035 W / (m · K) under atmospheric pressure conditions, is reduced to an absolute pressure of 75 kPa, the thickness becomes 0.031 W / (m · K). There was almost no change. On the other hand, under low pressure conditions of 50 kPa or less, it was found that although the rate of decrease in thermal conductivity was reduced, the thickness was significantly reduced and the substantial heat insulation performance was deteriorated. Furthermore, when the pressure was reduced below 1 kPa, the thermal conductivity tended to increase rather. This is considered to be because the filling rate of the core material is increased by reducing the thickness of the core material, and the solid heat conduction through the core material is increased. From these results, the pressure of the second vacuum degree in which the vacuum heat insulating element 10 and the second core material 18 which is an EPS heat insulating material are covered with the vacuum outer shell 19 can be set to a value larger than 50 kPa in absolute pressure. desirable. Furthermore, in the production line, if the pressure is reduced by using a large vacuum pump or the like, the productivity becomes worse. Therefore, the pressure around the second core member 18 is preferably set to an absolute pressure of about 75 kPa. desirable.

  Here, the vacuum heat insulating member 16 shown in FIGS. 10 and 11 is, for example, a vacuum envelope 19 made of PE in which three sides are sealed in advance for the second core material 18 and the vacuum heat insulating element 10 which are EPS heat insulating materials. It was inserted into the bag, and sucked with a blower with the same performance as a vacuum cleaner, while the last side of the opening was sandwiched between heat sealers and heat-sealed. Similarly, the second vacuum heat insulating member 17 is manufactured by sealing the third core member 21 by heat fusion while sucking the third core member 21 in a bag serving as the vacuum envelope 22.

  Further, the vacuum heat insulating element 10 has gas intrusion from the seal portion of the vacuum envelope 9 in the long term due to an internal pressure and an external pressure difference (difference in gas partial pressure in terms of composition unit). The degree of vacuum is maintained by removing the intrusion gas by adsorption or physical adsorption. In this embodiment, since the outer periphery of the vacuum heat insulating element 10 is further surrounded by the second vacuum skin 19 and held at a low pressure, the pressure difference between the inside and outside of the vacuum heat insulating element 10 is reduced. Therefore, the load of the adsorbent can be reduced, which is advantageous in terms of long-term reliability of the vacuum heat insulating element 10. Moreover, although it showed that it was made to foam with hydrocarbons (for example, butane and pentane) as a foaming agent in the manufacturing method of EPS heat insulating material, you may foam this with a carbon dioxide gas. In this case, it is desirable to contain carbon dioxide in a heat insulating material that is a core material immediately after foaming. Since carbon dioxide has a thermal conductivity of about 30% lower than that of air, the thermal conductivity of the heat insulating material can be further reduced by several percent. Further, since the space having the second degree of vacuum has a carbon dioxide gas atmosphere inside the heat insulating material, an effect that the sealing performance of the vacuum envelope 9 that seals the vacuum heat insulating element 10 is better than air is obtained. It is done. The same applies to the second vacuum heat insulating member 17.

  As described above, the heat insulating container of the seventh embodiment shown in FIGS. 10 to 12 is vacuum-sealed to the vacuum heat insulating element 10 by the common second vacuum skin 19 and is lower than the first degree of vacuum. Although the vacuum heat insulating member 16 which combined the 2nd core material 18 which is the heat insulation element 20 made into the vacuum degree is provided, the vacuum heat insulating member in embodiment shown to FIGS. 4, the heat insulating element 11 combined with the vacuum heat insulating element 10 can be used as the second core member 18. In this case as well, the manufacturing process can be simplified and the vacuum heat insulating element 10 can be prevented from being damaged during assembly, and the heat insulating performance can be improved as described with reference to FIG. Here, when glass wool having high flexibility is applied as the second core member 18 to the heat insulating element 11 shown in FIG. 2 or FIG. 5, the heat insulating structure cannot be maintained due to low pressure, and the second core member 18 Since the porosity is lowered, the heat insulation performance may be lowered, which is not necessarily preferable. However, it is effective to improve the adhesion between the container 2 and the vacuum heat insulating member 4 as shown in FIGS.

Embodiment 8 FIG.
In the heat insulating container 1 shown in FIG. 13, a part of the heat insulating member covering the side wall 5 of the cylindrical container 2 is the non-vacuum heat insulating member 23, and the other parts are the vacuum heat insulating element 10 and the heat insulating element 20. A vacuum heat insulating member 16 in which a second core member 18 is covered with a vacuum envelope 19. The upper and lower end walls 6 of the container 2 are covered with a non-vacuum heat insulating member similar to the non-vacuum heat insulating member 7 shown in FIG.

  Container 2 applied to hot / cold equipment, that is, hot water storage tanks, storage tanks such as ice sherbet and ice heat storage, refrigerators / freezers, etc. requires measurement piping such as connected piping and thermistor to be taken out from the side or top and bottom (Not shown). By providing the non-vacuum heat insulating member 23 made of a non-vacuum heat insulating material that can be easily processed into a complicated shape in these portions, it is easy to arrange the heat insulating material while avoiding the protrusions in the container 2 and the vicinity thereof. Can be. Accordingly, it is possible to realize a realistic heat insulation construction of the container 2 while maintaining high assembly workability and heat insulation performance.

Embodiment 9 FIG.
In the heat insulation container 1 shown in FIG. 14, the exterior 15 is a rectangular parallelepiped, the non-vacuum heat insulation member 23 is provided in a part of the heat insulating material covering about 1/4 of the cylindrical side surface of the container 2, and the other is a cylinder in advance A cylindrical vacuum insulating element 10 covering about ¾ of the side surface and a vacuum insulating element 10 concentrically combined with the vacuum insulating element 10 and covering the cylindrical thermal insulating element 20 as a second core member 18 with a vacuum envelope 19 It is surrounded by a vacuum heat insulating member 16 having a second degree of vacuum. The heat insulating material covering the upper and lower end walls of the container 2 is partially or entirely covered with the second vacuum heat insulating member 17 as in the seventh embodiment. Other configurations are the same as those shown in FIG.

  In this case, the same effect as in FIG. 13 can be obtained, and the number of parts can be reduced because the circumferential direction is divided into the vacuum heat insulating member 16 and the non-vacuum heat insulating member 23. Moreover, since the joint of a heat insulation member also decreases, the heat insulation with high heat retention performance is realizable. Moreover, since it has installed so that the whole outer peripheral part of the vacuum heat insulation element 10 may be covered with the 2nd core material 18, after arrange | positioning once in the container 2 at the time of manufacture, the vacuum heat insulation element 10 does not come out on the surface. For this reason, the risk of the vacuum insulation element 10 being broken and broken is reduced.

Embodiment 10 FIG.
In the heat insulating container shown in FIG. 15, the radial arrangement of the vacuum heat insulating element 10 and the second core member 18 of the vacuum heat insulating member 16 is reversed inward and outward with respect to the heat insulating container of FIG. Other configurations are the same as those in FIG. As a result, not only the effect equivalent to FIG. 13 and the improvement effect of the assembly workability due to the reduction in the number of parts can be obtained, but as a second core material 18 which is the heat insulating element 20, applying flexible glass wool or the like, It is possible to absorb a gap caused by a difference in curvature between the inner side surface of the vacuum heat insulating member 16 and the outer surface of the container 2, and higher heat retention performance can be realized.

Embodiment 11 FIG.
In the heat insulating container 1 shown in FIGS. 16 and 17, a substantially C-shaped cylindrical vacuum heat insulating member 16 covering approximately ¾ in the circumferential direction of the cylindrical container 2 and the non-vacuum covering the remaining approximately ¼. And a heat insulating member 23. The vacuum heat insulating member 16 extends over most of the circumferential direction of the container 2, and the vacuum heat insulating element 10 having a substantially C-shaped cross section disposed so as to be in direct contact with the container 2, and both circumferential ends of the vacuum heat insulating element 10 The second core 18 which is two prismatic heat insulating elements 20 which are combined and joined to each other and extend in the axial direction of the container 2, and the vacuum heat insulating element 10 and the heat insulating element 20 are covered together. And a second vacuum skin 19 having a degree of vacuum. The upper and lower end walls 6 of the container 2 are covered with a non-vacuum heat insulating member 7 similar to that shown in FIG. 4, but a second vacuum heat insulating member 17 as shown in FIG. 11 may be used. . In this heat insulation container 1, since the material of the 2nd core material 18 which is the heat insulation element 20 can be decreased, it can insulate at lower cost.

Embodiment 12 FIG.
In the heat insulating container 1 shown in FIG. 18, the exterior 15 has a hexagonal prism shape, and is disposed in the vicinity of the cylindrical container 2 and the surrounding vacuum heat insulating element 10. Other configurations are the same as those shown in FIGS. In the case of this heat insulating container 1, the installation area can be reduced by eliminating the extra space in the exterior 15, and the wall area of the exterior 15 can be reduced, so that the material cost can be reduced.

Embodiment 13 FIG.
In the heat insulating container 1 shown in FIG. 19, the configuration different from the heat insulating container 1 shown in FIGS. 16 and 17 is that the vacuum heat insulating member 16 is the heat insulating elements 11 at both ends of the C-shaped vacuum heat insulating element 10. The second vacuum heat insulating member 17 is provided on the outer side in the circumferential direction of the second core member 18. The second vacuum heat insulating member 17 is obtained by sealing the third core member 21 as the heat insulating element 24 with the third vacuum outer shell 22, and the periphery is fixed to the vacuum heat insulating member 4 with an adhesive tape, or the outer peripheral portion. It is installed by being tied up with a fastening tool.

  Since the vacuum envelope 9 for vacuum-sealing the vacuum heat insulating element 10, particularly the core material 8 of the vacuum heat insulating element 10, is weak against repeated bending loads, it is preferable that the bending and extending operation in the manufacturing process is as small as possible. According to this heat insulating container 1, when the vacuum heat insulating element 10 is installed in accordance with the cylindrical container 2, the cylindrical part once molded is bent and the opening is not greatly opened, so that the opening shown in FIG. In addition, since the container peripheral area ratio of the vacuum heat insulating member 16 can be increased, higher performance of the heat insulating material can be achieved.

The configuration of the heat insulating container illustrated and described above is merely an example, and various modifications can be made, and the features of each specific example can be used altogether or selectively combined.
Moreover, the heat insulation container 1 shown in the Example may be a hot water storage tank, a cold water tank, a cooking container, a refrigeration room or a freezing room, and insulated pipes used together therewith.

  This invention can be used for a heat insulating container.

  DESCRIPTION OF SYMBOLS 1 Heat insulation container, 2 container, 3 heat insulation member, 4 vacuum heat insulation member, 5 side wall, 6 end wall, 7 non-vacuum heat insulation member, 8 core material, 9 vacuum outer skin, 10 vacuum heat insulation element, 11 heat insulation element, 12 outer skin, 13 Non-vacuum heat insulating material, 14 grooves, 15 exterior, 16 vacuum heat insulating member, 17 second vacuum heat insulating member, 18 second core material, 19 second vacuum skin, 20 heat insulating material, 21 heat insulating material, 22 third Vacuum skin, 23 Non-vacuum heat insulation member, 24 Heat insulation element.

Claims (11)

In a heat insulating container comprising a container and a plurality of heat insulating members that at least one is a vacuum heat insulating member and covers substantially all outer surfaces of the container in cooperation with each other,
The vacuum heat insulating member is
A vacuum insulation element having a core and a first vacuum envelope that seals the core in a vacuum;
A heat insulating element that is an EPS heat insulating material combined with the vacuum heat insulating element and formed into a shape along the outer surface of the container ;
The vacuum insulation element and a second vacuum envelope that is a bag that covers the insulation element together,
The space surrounding the heat insulating element is set to a second vacuum level lower than the vacuum level of the vacuum heat insulating element,
The second degree of vacuum is a pressure of a value greater than 50 kPa,
Insulated container. The space having the second degree of vacuum is a carbon dioxide atmosphere.
The heat insulating container according to claim 1 . The heat insulation according to claim 1 or 2 , wherein the heat insulation container includes an exterior for storing the container, and the vacuum heat insulation member is disposed in a portion where the distance between the container and the exterior is short. container. The heat insulation container according to any one of claims 1 to 3 , wherein the vacuum heat insulation element of the vacuum heat insulation member is at least partially embedded in the heat insulation element . The heat insulation container according to any one of claims 1 to 4 , wherein the vacuum heat insulation element and the heat insulation element are arranged continuously in a thickness direction of a container wall of the container. The heat insulation container according to any one of claims 1 to 5 , wherein the vacuum heat insulation element and the heat insulation element are arranged continuously in a direction along a container wall of the container. The heat insulation container according to any one of claims 1 to 6 , wherein the heat insulation element is a vacuum heat insulation element using a foam heat insulation material foamed with carbon dioxide as a core material . The said container is a hot water storage tank, The heat insulation container as described in any one of Claims 1-7 characterized by the above-mentioned . The said container is a cold water tank, The heat insulation container as described in any one of Claims 1-7 characterized by the above-mentioned . The said container is a cooking container, The heat insulation container as described in any one of Claims 1-7 characterized by the above-mentioned . The said container is a refrigerator compartment or a freezer compartment, The heat insulation container as described in any one of Claims 1-7 characterized by the above-mentioned .

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