JP2005035632A - Vacuum heat insulation container and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve heat insulation properties by restricting a portion producing heat bridge only to the periphery of a cylindrical opening portion to shut off heat from escaping therefrom or entering therein, in a vacuum heat insulation container with its cylindrical opening part formed projecting outward. <P>SOLUTION: The vacuum heat insulation container is constituted of a container 11 having a cylindrical opening part 15 projecting outward and a vacuum heat insulation member 21 covering the outer face of the container 11 as well as surrounding the side faces 15a of the cylindrical opening part 15 with the cylindrical opening part 15. The vacuum heat insulation member 21 stores a heat insulation body 25 shaped in a double structure bag body 24 comprising an inner bag 22 and an outer bag 23, and makes the space between the inner bag 22 and the outer bag 23 vacuum. The heat insulation body 25 is constituted of a bottom block 25a, a cylindrical side block 25b and an upper block 25c. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vacuum heat insulating container and a manufacturing method thereof.

Conventionally, as a vacuum heat insulating container, a container in which fibers or powders are filled between an outer container and an inner container and the outer container and the inner container are evacuated is known.
JP 7-55087 A

  However, in the conventional vacuum heat insulation container, when the cylindrical opening for taking in and out the liquid is formed to protrude outward, the structure of the heat insulating material becomes complicated, and the layer for holding the vacuum (metal and metal) A heat bridge caused by a large number of joints of the gas barrier film) occurred, and the heat insulating property was easily lowered. Furthermore, the fibers and powders filled between the outer container and the inner container are likely to be biased when the space between the outer container and the inner container is evacuated or when the container is used, and the heat insulating property may be lowered.

  The present invention has been made in view of the above points, and in a vacuum heat insulating container in which a cylindrical opening protrudes outwardly, heat input and output at the periphery of the cylindrical opening is reduced to improve heat insulation. For the purpose.

  The invention of claim 1 includes: a container having a cylindrical opening protruding outward; and a vacuum heat insulating member that covers the outer surface of the container and surrounds the side surface of the cylindrical opening in the cylindrical opening. The vacuum heat insulating member has a heat insulating body formed in a double-structured bag made of an inner bag and an outer bag, and the space between the inner bag and the outer bag is evacuated. It relates to a vacuum insulation container.

  The invention of claim 2 is the invention according to claim 1, wherein the container is composed of a bottom surface, a side surface, and an upper surface, and the upper surface is formed with the cylindrical opening. A bottom block disposed outside the bottom surface of the container, a cylindrical side block disposed so as to surround the outer side surface of the container, and an opening hole through which the cylindrical opening of the container is inserted. And an upper block disposed outside the upper surface of the container.

  The invention of claim 3 comprises a bottom surface, a side surface, and a top surface, and a manufacturing method of a vacuum heat insulating container in which the outer surface of a container having a cylindrical opening projecting outwardly on the top surface is covered with a vacuum heat insulating member. In the above, the inner bag tubular body is covered with the inner bag tubular body having an opening hole through which the tubular opening of the container is inserted formed in the upper surface and the lower end opened. An inner bag forming step of forming an inner bag covering the outer surface of the container by sealing the lower end of the tubular body for the inner bag and then projecting the cylindrical opening of the container outward from the opening hole of the container And a bottom block having heat insulation at a position corresponding to the outer side of the bottom surface of the container on the outer surface of the inner bag, and a cylindrical side part having heat insulation at a position corresponding to the outer side surface of the container. A block is arranged, and the container has a heat insulating property at a position corresponding to the outer surface of the container. A heat insulator arranging step for arranging an upper block formed with an opening hole through which the cylindrical opening is inserted, an opening hole through which the cylindrical opening of the container is inserted is formed on the upper surface, and the lower end is Cover the outer surface of the side block and the upper block with the cylindrical body for the outer bag in the open state, and outwardly open the cylindrical opening of the container from the opening hole of the cylindrical body for the outer bag. Projecting, and then sealing the edges of the opening holes in the inner bag and the outer bag cylindrical body, and then placing the block between the inner bag and the outer bag cylindrical body An outer bag forming step for sealing the lower end of the outer bag tubular body while reducing the pressure of the space, and a method for manufacturing a vacuum heat insulating container.

  According to the vacuum heat insulating container of claim 1, since the vacuum heat insulating member covers the outer surface of the container and surrounds the side surface of the cylindrical opening formed in the container, only from the peripheral edge of the cylindrical opening. Heat enters and exits and heat insulation is improved. Further, since the vacuum heat insulating member contains a heat insulating body formed in a double-structured bag consisting of an inner bag and an outer bag, the heat insulating body between the inner bag and the outer bag is a granular material. Unlike the case, when the vacuum is applied between the inner bag and the outer bag or when the vacuum heat insulating container is used, the heat insulator is not biased, thereby preventing a decrease in heat insulation caused by the bias. And good thermal insulation can be obtained.

  According to the vacuum heat insulating container of claim 2, the heat insulating body is a bottom block disposed outside the bottom surface of the container, and a cylindrical side block disposed so as to surround the outer side surface of the container. Since the hole for opening is formed and the upper block is arranged outside the upper surface of the container and is divided into a plurality of blocks, the heat insulator is arranged along the outer shape of the container. Since the outer surface of the container including the outer periphery of the cylindrical opening can be reliably covered, good heat insulating properties can be obtained.

  According to the method for manufacturing a vacuum heat insulating container according to claim 3, heat enters and leaves only from the peripheral edge of the cylindrical opening of the container, and there is no other place where heat bridge is generated, and the bias of the heat insulating body is present. As a result, it is difficult to cause a decrease in heat insulation due to the above, and thus a vacuum heat insulation container excellent in heat insulation can be easily obtained.

  FIG. 1 is a cross-sectional view of an embodiment of the vacuum heat insulating container of the present invention, FIGS. 2 and 3 are diagrams showing steps according to an embodiment of the manufacturing method of the present invention, and FIG. 4 is an embodiment of the present invention. FIG. 5 is an exploded perspective view showing the inner bag cylindrical body, and FIG. 5 is an exploded perspective view showing the outer bag cylindrical body of one embodiment of the present invention.

  A vacuum heat insulating container 10 shown in FIG. 1 includes a container 11 and a vacuum heat insulating member 21 that covers the outer surface of the container 11. The container 11 is made of plastic, metal, ceramic, or the like, and includes a bottom surface 12, a side surface 13, and an upper surface 14. In this example, a cylindrical opening 15 protruding outward is formed at the center of the upper surface 14. A filling material such as a liquid can be stored from the cylindrical opening 15.

  The vacuum heat insulating member 21 covers the outer surface of the container 11, and has a shape that surrounds the side surface 15 a of the cylindrical opening 15 in the cylindrical opening 15 of the container 11. The vacuum heat insulating member 21 of the present embodiment surrounds the bottom surface 12, the side surface 13, and the upper surface 14 of the container 11, and further covers from the base (lower end) to the middle between the tip (upper end) of the cylindrical opening 15. Yes. In the vacuum heat insulating member 21, a shaped heat insulating body 25 is accommodated in a double-structured bag body 24 composed of an inner bag 22 and an outer bag 23, and a vacuum is formed between the inner bag 22 and the outer bag 23. Has been.

  The inner bag 22 and the outer bag 23 are configured by processing a sheet material having a gas barrier property and having a weldable surface into a bag shape. In this embodiment, the inner bag 22 and the outer bag 23 are made of a plastic layer that can be thermally welded to both sides of a gas barrier layer made of a metal foil such as aluminum, for example, polypropylene, polyethylene, polyamide resin, EVA resin, ABS resin. It is made by processing a sheet of a three-layer structure in which etc. are laminated into a bag shape. The inner bag 22 and the outer bag 23 are welded to each other at the position of the side surface 15 a of the cylindrical opening 15 in the container 11 to seal between the inner bag 22 and the outer bag 23. In addition, about the layer of the outer surface side of the said outer bag 23, in order to protect the said vacuum heat insulation member 21, a thing with high intensity | strength is preferable, and what consists of polyethylene terephthalate, polyamide, etc. is mentioned as a suitable example.

  The heat insulator 25 is formed of a foam or a sintered body of a granular porous material that has been previously shaped into a required shape. Examples of the heat insulator 25 include polyurethane foam, polystyrene foam, polyethylene foam, polyimide foam, polypropylene foam, other organic porous molded bodies, inorganic porous molded bodies, mineral porous bodies, or silica powder. And fine powdered silica formed by compression or sintering into a required shape. In particular, a fumed silica formed by compressing or sintering into a required shape is a suitable example. Furthermore, the said heat insulation body 25 in a present Example is comprised by several block 25a-25c so that it may be understood also from (D) of FIG. Specifically, a bottom block 25a disposed outside the bottom surface 12 of the container 11, a cylindrical side block 25b disposed so as to surround the outside of the side surface 13 of the container 11, and in this example, in the center. The heat insulator 25 is formed by an opening hole 26 through which the cylindrical opening 15 of the container is inserted and an upper block 25 c disposed outside the upper surface 14 of the container 11.

  Next, an example is described about the manufacturing method of the said vacuum heat insulation container 10. FIG. The manufacturing method includes an inner bag forming step, a heat insulator arranging step, and an outer bag forming step.

  In the inner bag forming step, as shown in FIG. 2A, the inner bag cylindrical body 22A having the opening hole 31 formed in the upper surface 32 and the lower end 33 opened is used as the container 11. The cylindrical opening 15 of the container 11 protrudes outward from the opening hole 31 and then, as shown in FIG. 2B, a lower end 33 of the inner bag cylindrical body 22A. Is welded and sealed by a known welding means to form an inner bag 22 that covers the outer surface of the container 11 as shown in FIG. The lower end 33 of the inner bag cylindrical body 22A is folded after being welded and sealed outside the bottom surface 12 of the container 11.

  The inner bag cylindrical body 22A is formed by processing the sheet material having the gas barrier property and the surface capable of being thermally welded into a required shape by cutting and welding. In this embodiment, as shown in FIG. 4, the body portion 221A, the lid portion 222A, and the opening cylinder portion 223A formed from the sheet material S having the above-described structure having gas barrier properties and weldability are heat-welded. Consists of one. The body 221 </ b> A has a diameter that can cover the side surface 13 of the container 11, and has a cylindrical shape that is longer than the height of the side surface 13. Further, in this example, the lid portion 222A has a short cylindrical portion 34 into which the cylindrical opening 15 of the container 11 can be inserted at a central position, and can be covered with the upper surface 14 of the container 11. Consists of. Furthermore, the opening cylindrical portion 223 </ b> A has a cylindrical shape that can cover the outer periphery of the cylindrical opening 15 of the container 11. The short cylindrical portion 34 of the lid portion 222A and the opening cylindrical portion 223A are welded at the ends to constitute the opening hole 31. Note that the body 221A and the opening cylinder 223A in the illustrated example each form the sheet material S into a required cylinder shape, and an inner layer and an outer layer (both can be heat-welded at the end of the sheet material S). It is formed by layering and welding. The lid portion 222A is formed by press-molding the sheet material S into a lid portion shape and then trimming.

  In the heat insulator arrangement step, as shown in FIG. 2D and FIG. 3E, the outer surface of the inner bag 22 has heat insulating properties at a position corresponding to the outside of the bottom surface 12 of the container 11. A bottom block 25a is disposed, a cylindrical side block 25b having heat insulation is disposed at a position corresponding to the outside of the side surface 13 of the container 11, and a position corresponding to the outside of the upper surface 14 of the container 11 is disposed at In this example, the upper blocks 25C each having an insulating hole 26 are formed in the center. As described above, the bottom block 25a, the side block 25b, and the upper block 25c are made of foam, or formed by compressing or sintering silica powder or fine powder silica into a required shape. Each of them is preliminarily shaped into a shape according to the arrangement location by cutting or sintering. In addition, the said heat insulation arrangement | positioning process may invert the said container 11, and may arrange | position each said block 25a-25c with the said bottom face 12 up, and can be performed in the state which is easy to work. Also in other processes, the work of the container 11 may be changed as appropriate.

  In the outer bag forming step, as shown in FIGS. 3 (F) and 3 (G), an opening hole 41 through which the cylindrical opening 15 of the container 11 is inserted is formed in the upper surface 42, and a lower end 43 is formed. The outer bag cylindrical body 23A in an opened state is placed on the outer surfaces of the side block 25b and the upper block 25c, and the cylindrical opening 15 of the container 11 protrudes outward from the opening hole 41. After that, the edges of the opening holes 31 and 41 in the inner bag 22 and the outer bag cylindrical body 23A are heat-sealed and sealed, and then the inner bag 22 and the outer bag cylindrical shape are sealed. The lower end 43 of the outer bag tubular body 23A is heat-welded and sealed while reducing the space in which the blocks 25a to 25c are disposed between the body 23A and the body 23A. As a result, as shown in FIG. 3H, the outer bag cylindrical body 23A becomes the outer bag 23, and the inner bag 22 and the outer bag 23 form a double-structured bag body 24. In addition, a heat insulating body 25 composed of the blocks 25a to 25c is disposed in the bag body 24 to form a vacuum heat insulating member 21 in which the space between the inner bag 22 and the outer bag 23 is evacuated, and the vacuum heat insulating The vacuum heat insulating container 10 in which the container 11 is surrounded by the member 21 is obtained. The lower end 43 of the outer bag tubular body 23A is folded after being welded and sealed on the outer surface of the bottom block 25a.

  The cylindrical body 23A for the outer bag is formed by processing the sheet material having the above-described structure having gas barrier properties and weldability into a required shape by cutting and welding. In this embodiment, as shown in FIG. 5, the body portion 231A, the lid portion 232A, and the opening cylinder portion 233A formed from the sheet material S having the above structure are integrally formed by heat welding. The body portion 231A covers the side block 25b and has a cylindrical shape longer than the height of the side block 25b. The lid 232A has a short cylindrical portion 44 through which the cylindrical opening 15 of the container 11 and the opening hole 31 of the inner bag 22 can be inserted, and can be covered with the upper block 25c. Consists of. Furthermore, the opening cylinder 233 </ b> A has a cylindrical shape that can cover the outer periphery of the cylindrical opening 15 of the container 11 and the outer periphery of the opening hole 31 of the inner bag 22. The short cylinder part 44 of the lid part 232A and the opening cylinder part 233A are welded at the end part to constitute the opening hole 41. The trunk portion 231A and the opening cylinder portion 233A in the illustrated example each form the sheet material S into a required cylindrical shape, and an inner layer and an outer layer (both layers that can be welded) at both ends of the sheet material S. Are welded. The lid 232A is formed by pressing the sheet material S into a lid shape and then trimming. The lower end 43 of the outer bag tubular body 23A can be sealed by an appropriate method. For example, the container 11 in the state shown in FIG. 3G, that is, in a state where the outer bag cylindrical body 23A covers the bottom block 25a, the side block 25b, and the upper block 25c, is not shown in the drawing. By storing in the chamber and sealing the lower end 43 of the outer bag tubular body 23A with a heat welding apparatus or the like while reducing the pressure between the inner bag 22 and the outer bag tubular body 23A in the vacuum chamber. It can be carried out.

It is sectional drawing of one Example of the vacuum heat insulation container in this invention. It is a figure which shows a part of process based on one Example of the manufacturing method in this invention. It is a figure which shows the remainder of the process which concerns on one Example of the manufacturing method in this invention. It is a perspective view which decomposes | disassembles and shows the cylindrical body for inner bags of one Example in this invention. It is a perspective view which decomposes | disassembles and shows the cylindrical body for outer bags of one Example in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vacuum heat insulation container 11 Container 21 Vacuum heat insulation member 22 Inner bag 22A Inner bag cylindrical body 23A Outer bag cylindrical body 23 Outer bag 24 Bag body 25 Thermal insulation body 25a-25b Block of thermal insulation body

Claims (3)

A container (11) having a cylindrical opening (15) projecting outward, and covering the outer surface of the container (11), the side surface (15a) of the cylindrical opening (15) in the cylindrical opening (15) ) Surrounding the vacuum heat insulating member (21),
The vacuum heat insulating member (21) has a heat insulating body (25) shaped in a double-structured bag body (24) composed of an inner bag (22) and an outer bag (23), and the inner bag A vacuum insulation container characterized in that the space between (22) and the outer bag (23) is evacuated. The container (11) includes a bottom surface (12), a side surface (13), and an upper surface (14), and the upper surface (14) is formed with the cylindrical opening (15),
A cylinder in which the heat insulator (25) is disposed so as to surround the bottom block (25a) disposed outside the bottom surface (12) of the container (11) and the outside of the side surface (13) of the container (11). And has an opening hole (26) through which the cylindrical opening (15) of the container (11) is inserted, and is disposed outside the upper surface (14) of the container (11). The vacuum heat insulating container according to claim 1, further comprising an upper block (25 c) formed. A bottom surface (12), a side surface (13), and an upper surface (14) are formed, and the upper surface (14) is formed with a cylindrical opening (15) projecting outward. In the manufacturing method of the vacuum heat insulating container (10) covered with the heat insulating member (21),
An inner bag tubular body (31) in which an opening hole (31) through which the tubular opening (15) of the container (11) is inserted is formed in the upper surface (32) and the lower end (33) is opened. 22A) is put on the container (11) so that the cylindrical opening (15) of the container (11) protrudes outward from the opening hole (31) of the cylindrical body for inner bag (22A). Then, an inner bag forming step of forming an inner bag (22) covering the outer surface of the container (11) by sealing the lower end (33) of the inner bag cylindrical body (22A),
A bottom block (25a) having heat insulation is arranged at a position corresponding to the bottom surface (12) outside of the container (11) on the outer surface of the inner bag (22), and the side surface (13) outside of the container (11) The cylindrical side block (25b) having heat insulation is disposed at a position corresponding to the outer surface of the container (11), and the container (11) has heat insulation at a position corresponding to the outside of the upper surface (14). 11) a heat insulator arranging step for arranging an upper block (25c) in which an opening hole (26) through which the cylindrical opening (15) is inserted is formed;
An outer bag tubular body (23A) in which an opening hole (41) through which the tubular opening (15) of the container (11) is inserted is formed on the upper surface and the lower end (43) is opened. The cylindrical opening (41) of the container (11) is put on the outer surface of the side block (25b) and the upper block (25c) from the opening hole (41) of the outer bag cylindrical body (23A). 15) projecting outward, and then sealing the edges of the opening holes (31, 41) in the inner bag (22) and the outer bag tubular body (23A); While reducing the space in which the blocks (25a, 25b, 25c) between the bag (22) and the outer bag tubular body (23A) are disposed, the outer bag tubular body (23A) An outer bag forming step for sealing the lower end (43); Law.

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