JP2016156424A - Vacuum heat insulation material and heat insulation panel including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum heat insulation material capable of obtaining a heat insulation panel having excellent heat insulation performance, in a case where the heat insulation panels are provided in parallel with each other.SOLUTION: A vacuum heat insulation material comprises a tabular heat insulation core material 2, and an outer cover material 3 inside which the heat insulation material 2 is hermetically sealed by forming a sheet shape and providing sealing parts 4 welded at a peripheral edge part. When the vacuum heat insulation materials are provided in parallel with each other in a state where peripheral surfaces 1c are opposed, heat transfer from one surface 1a to another surface 1b is suppressed. The sealing part 4 projecting from the peripheral surface 1c is provided at a position along the surface 1a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vacuum heat insulating material and a heat insulating panel including the same.

  The vacuum heat insulating material is a heat insulating material in which a plate-shaped heat insulating core material such as a glass wool laminate or polystyrene foam is sealed with a sheet-shaped outer covering material such as a laminate film (see, for example, Patent Document 1-2). Such a vacuum heat insulating material suppresses the movement of heat from one surface to the other surface when arranged side by side with their peripheral surfaces facing each other. A vacuum heat insulating material is manufactured as follows, for example. First, two outer cover materials having a substantially rectangular shape in plan view and one heat insulating core material having a substantially rectangular shape in plan view are prepared. Next, a heat insulating core material is disposed between the two jacket materials. Next, the area surrounded by the two jacket materials is decompressed and the peripheral portions of the jacket materials are welded together to obtain a vacuum heat insulating material 50 as shown in FIG. The vacuum heat insulating material 50 obtained in this way has the sealing part 52 formed only by the peripheral part of the jacket material 51. The sealing portion 52 is generally configured to have a width dimension of at least about 10 mm in order to ensure gas barrier properties. Such a sealing portion 52 protrudes from the peripheral surface 54 at a position that is the center of the plate thickness of the heat insulating core material 53, and is the entire length of the depth dimension of the heat insulating core material 53 (the length dimension in the through direction in FIG. 7). It is provided over.

  The vacuum heat insulating material mentioned above is used as a structural member of the heat insulation panel applied to the storage and the building for housing which require heat insulation. The heat insulating panel includes a plurality of vacuum heat insulating materials, and is arranged in parallel with the peripheral surfaces thereof facing each other. In order to obtain a heat insulating panel with good heat insulating performance, it is desired to reduce the gap between the peripheral surfaces of the vacuum heat insulating materials adjacent to each other (hereinafter also referred to as “gap between vacuum heat insulating materials”). The reason for this is that, as is clear from FIG. 8, the smaller the gap between the vacuum insulation materials, the smaller the proportion of the air layer having a higher thermal conductivity with respect to the vacuum layer, so the thermal conductivity of the thermal insulation panel becomes smaller. .

JP 2001-141178 A JP 2003-269689 A

  By the way, when comprising a heat insulation panel using the vacuum heat insulating material 50 mentioned above, the following problems are pointed out. That is, as shown in FIG. 7, in the vacuum heat insulating material 50, since the sealing portion 52 is provided at a position that is the center of the plate thickness of the heat insulating core material 53, the vacuum heat insulation is performed so that the sealing portions 52 abut each other. The material 50 is arranged side by side. However, since the gap between the vacuum heat insulating materials 50 is large in the state shown in FIG. 7, the heat insulating performance of the heat insulating panel is not sufficient. When the vacuum heat insulating materials 50 in the state shown in FIG. 7 are brought close to each other in order to reduce the gap between the vacuum heat insulating materials 50, the jacket material 51 breaks through the tip of the sealing portion 52 of the adjacent vacuum heat insulating material 50. And the jacket material 51 may be damaged. Further, when each sealing portion 52 is bent along the peripheral surface 54 in order to further reduce the gap between the vacuum heat insulating materials 50, the bent portion is close to the adjacent vacuum heat insulating material 50. Then, when an external force is applied to the bent portion of the jacket material 51 through the adjacent vacuum heat insulating material 50 due to vibrations or the like due to external factors when using the heat insulation panel, the jacket material 51 may be damaged. When the jacket material 51 is damaged, air enters the inside of the vacuum heat insulating material 50, the heat insulating performance of the vacuum heat insulating material 50 is lowered, and a heat insulating panel with good heat insulating performance cannot be obtained.

  The present invention has been made in view of the above circumstances, and a vacuum heat insulating material capable of obtaining a heat insulating panel having a good heat insulating performance when the heat insulating panel is formed in parallel with each other, and a heat insulating panel including the same The purpose is to provide.

  In order to achieve the above object, a vacuum heat insulating material according to the present invention comprises a plate-shaped heat insulating core material and a heat insulating core material formed in a sheet shape and welded to each other at the peripheral edge portion to provide a sealing portion. In the vacuum heat insulating material configured to include a covering material that seals the sealing member, the sealing portion protruding from the peripheral surface is provided at a position along the surface.

  The heat insulation panel which concerns on this invention is equipped with two or more said vacuum heat insulating materials, and the adjacent vacuum heat insulating materials were arranged in parallel in the position where the said sealing part mutually differs.

  In the vacuum heat insulating material which concerns on this invention, about the sealing part which protrudes from a surrounding surface, it has provided in the position along the surface. For this reason, a vacuum heat insulating material can be juxtaposed in the position from which a sealing part differs mutually. When a heat insulating panel is configured by arranging a plurality of vacuum heat insulating materials side by side, the region where the outer cover material constituting the sealing portion is folded to reduce the gap between the vacuum heat insulating materials is very Get smaller. If it does so, it will reduce reliably that the heat insulation performance of a vacuum heat insulating material falls by the damage of the jacket material resulting from the bending of a jacket material. Therefore, according to the vacuum heat insulating material according to the present invention, a heat insulating panel having good heat insulating performance can be obtained when the heat insulating panels are arranged side by side.

  In the heat insulation panel which concerns on this invention, the adjacent vacuum heat insulating material is arranged in parallel in the position from which a sealing part differs mutually. In such a heat insulating panel, it is not necessary to bend the jacket material constituting the sealing portion in order to reduce the gap between the vacuum heat insulating materials. If it does so, the heat insulation performance of a vacuum heat insulating material will not fall by the damage of the jacket material resulting from the bending of a jacket material. Therefore, according to the heat insulation panel according to the present invention, good heat insulation performance can be obtained.

FIG. 1 is a perspective view of a vacuum heat insulating material according to an embodiment of the present invention. Fig.2 (a) is a top view of the vacuum heat insulating material of FIG. FIG.2 (b) is sectional drawing which cut | disconnected the vacuum heat insulating material of Fig.2 (a) along the AA line. The cross-sectional view of FIG. 2B is simplified to clarify the position of the sealing portion which is the point of the present invention. FIG. 3 is an explanatory view showing an example of a manufacturing procedure of the vacuum heat insulating material of FIG. FIG. 4 is a partially cutaway plan view showing an embodiment of a heat insulating panel configured using the vacuum heat insulating material of FIG. FIG. 5 is a schematic diagram showing a state in which three vacuum heat insulating materials of FIG. 1 are arranged side by side. FIG. 6 is a schematic view showing a state in which three vacuum heat insulating materials in FIG. 1 are arranged side by side in a manner different from that in FIG. FIG. 7 is a longitudinal sectional view of a conventional vacuum heat insulating material, and shows a state in which two vacuum heat insulating materials are arranged side by side. FIG. 8 is a graph showing the relationship between the gap between the vacuum heat insulating materials and the thermal conductivity of the heat insulating panel having the gap.

  Embodiments of a vacuum heat insulating material according to the present invention will be described below in detail with reference to the accompanying drawings.

  The vacuum heat insulating material 1 of FIG.1 and FIG.2 is comprised including the plate-shaped heat insulation core material 2 (refer FIG. 2) and the sheet-like outer covering material 3. In FIG. The vacuum heat insulating material 1 is a heat insulating material that suppresses the movement of heat from one surface 1a to the other surface 1b when arranged side by side with the peripheral surfaces 1c facing each other. The heat insulating core material 2 serves as a skeleton of the vacuum heat insulating material 1 and includes a hard member and a filling member described later. The hard member constitutes the outer shape of the heat insulating core material 2. This hard member has a strength capable of maintaining its own shape even under reduced pressure. The hard member is made of a low thermal conductivity material. Examples of the low thermal conductivity material applied to the hard member include resin materials such as styrene foam and urethane foam. The filling member is filled inside the hard member, and its shape is not particularly limited. A low thermal conductivity material is also used for the filling member. Examples of the low thermal conductivity material applied to the filling member include inorganic materials such as silica powder and glass wool. Such a filling member is filled into a hard member to form a plate-like heat insulating core material 2. In the vacuum heat insulating material 1 having the heat insulating core material 2 as a constituent member, the shape is maintained and good heat insulating performance is realized.

  The jacket material 3 is for sealing the heat insulation core material 2 inside, and before the vacuum heat insulation material 1 is assembled, it is configured as a single film having a rectangular shape in plan view. For example, a three-layer laminate film is used for the jacket material 3 in order to weld each other and prevent the outside air from entering the vacuum heat insulating material 1 and prevent the surface from being damaged. This laminate film has a heat-welded layer such as high-density polyethylene as the innermost layer, a gas barrier layer made of metal foil or the like as the intermediate layer, and a surface protective layer such as polyethylene terephthalate as the outermost layer.

  Next, the structure of the vacuum heat insulating material will be described. As shown in FIGS. 1 and 2, the vacuum heat insulating material 1 in which the heat insulating core material 2 is covered with the jacket material 3 has a sealing portion 4 and a sealing portion 5. The sealing part 4 protrudes from the surrounding surface 1c, and is provided in the position along the lower surface (surface 1a). That is, the sealing part 4 is in the left and right peripheral parts of the vacuum heat insulating material 1, and the lower surface of the jacket material 3 that covers the lower surface of the heat insulating core material 2 and the lower surface of the sealing part 4 are positioned on substantially the same surface. It is provided to do. This sealing part 4 has a width dimension of about 10 mm, and is formed over the entire length of the heat insulation core material 2 in the depth dimension (the length dimension in the vertical direction on the paper surface in FIG. 2A). The sealing portion 5 is in the middle of the heat insulating core material 2 in the depth direction. The sealing portion 5 has a width dimension of about 10 mm, is formed along the outer shape of the heat insulating core material 2, and straddles between the left and right peripheral edge portions of the vacuum heat insulating material 1. The sealing portion 4 and the sealing portion 5 are portions where the peripheral portions of the jacket material 3 covering the heat insulating core material 2 are welded to each other. The welding of the peripheral edge portion of the jacket material 3 is realized by thermally welding the thermal welding layer in a state where the thermal welding layers of the jacket material 3 are overlapped. In this way, the heat insulation core material 2 is sealed inside by welding the peripheral part of the jacket material 3 mutually.

  Next, an example of a manufacturing procedure of the vacuum heat insulating material will be described with reference to FIG. First, as shown in FIG. 3A, a sheet-like outer covering material 3 having a rectangular shape in plan view is prepared. As the jacket material 3, the above-described laminate film is used. Next, a rectangular tube-shaped hard member (not shown) is placed on the jacket material 3. Next, the edge part including the left side 31 and the edge part including the right side 32 of the jacket material 3 are respectively lifted upward to wrap the hard member. Next, as shown in FIG. 3B, the edges of each other are overlapped and welded so that the left side 31 and the right side 32 match. In this way, one piece of the covering material 3 constitutes a rectangular tubular body 7 having openings on both sides.

  As shown in FIG. 3B, the sealing portion 5 in which the edge portion including the left side 31 and the edge portion including the right side 32 of the jacket material 3 are welded to each other stands from the upper surface portion 71 of the cylindrical body 7. . The covering material 3 constituting the sealing portion 5 is tilted toward the right side so as to come into contact with the upper surface portion 71.

  Next, a portion including the short sides 61 facing each other in the opening 6 located on the front side of the paper surface is folded inward. Next, a portion of the upper surface portion 71 in the vicinity of the opening 6 (an edge portion of the outer covering material 3) is bent toward a portion of the lower surface portion 72 (an edge portion of the outer covering material 3) located at a position facing this portion. Thus, the portion near the opening 6 of the upper surface portion 71 is brought close to the lower surface portion 72 and the portions near the opening 6 are overlapped. Next, the overlapped portion is welded. In this way, as shown in FIG. 3C, the opening on the near side of the cylindrical body 7 is closed, and the single jacket material 3 is formed into a bag (gadget bag) by the sealing portion 4 and the sealing portion 5. Become.

  Next, as shown in FIG. 3D, a filling member (not shown) is inserted from the opening 6 on the back side of the sheet of the bag, and the inside of the hard member is filled with the filling member. Next, after evacuating through the opening 6 of the bag to decompress the inside of the bag, the opening 6 of the bag is closed (FIG. 3E). The method for closing the opening 6 of the bag is the same as the method for closing the opening 6 on the near side. That is, a portion including short sides facing each other in the opening 6 of the bag is folded inward. Next, a portion of the upper surface portion 71 in the vicinity of the opening 6 (an edge portion of the outer covering material 3) is bent toward a portion of the lower surface portion 72 (an edge portion of the outer covering material 3) located at a position facing this portion. Thus, the portion near the opening 6 of the upper surface portion 71 is brought close to the lower surface portion 72 and the portions near the opening 6 are overlapped. Next, the overlapped portion is welded. Thus, the bag opening 6 is closed.

  As shown in FIG. 3 (e), a part of the edge of the outer cover material 3 protrudes from the sealing portion 4 to the outside of the sealing portion 4. By cutting off the protruding portion 8, the vacuum heat insulating material 1 as shown in FIG. 3 (f) is obtained. FIG. 3G is a development view of the jacket material 3 of the vacuum heat insulating material 1 obtained in FIG. As shown in FIG. 3G, there is a notch 9 at the edge of the jacket material 3. The notch 9 is a portion obtained by cutting the protruding portion 8 in FIG.

  Next, an embodiment of a heat insulating panel using the vacuum heat insulating material of FIG. 1 will be described with reference to FIG. FIG. 4 shows a heat insulating panel 10 configured by arranging a plurality of the vacuum heat insulating materials 1 of FIG. The heat insulating panel 10 includes a plurality of vacuum heat insulating materials 1. The plurality of vacuum heat insulating materials 1 are juxtaposed inside the panel body 20. The panel main body 20 serves as a skeleton that ensures the strength of the heat insulating panel 10, and includes a frame body 21 and two base materials 22. The frame body 21 is a frame material framed on four sides. Each of the two base materials 22 is a flat plate-like member, and is provided so as to sandwich the frame body 21.

  In manufacturing the heat insulating panel 10, first, the single base material 22 is assembled to the frame body 21. Next, the plurality of vacuum heat insulating materials 1 are arranged inside the frame body 21 so that the peripheral surfaces of the vacuum heat insulating materials face each other. Next, the remaining one base material 22 is assembled to the frame body 21 to obtain the heat insulating panel 10. The heat insulation panel 10 obtained in this way is used as a heat insulation wall of a container or a house building that is kept in a state cooled to a desired temperature, such as a mobile car cool box.

  Next, the parallel arrangement state of the vacuum heat insulating material in a heat insulation panel is demonstrated. FIG. 5 is a schematic diagram showing a state in which three vacuum heat insulating materials of FIG. 1 are arranged side by side. As shown in FIG. 5, the top and bottom of the vacuum heat insulating material 1 are alternately reversed in order from the left side of the three vacuum heat insulating materials 1. Thus, the adjacent vacuum heat insulating materials 1 are arranged in parallel at the positions where the sealing portions 4 are different from each other. That is, the adjacent vacuum heat insulating materials 1 are juxtaposed in a state in which the sealing portions 4 have mutually different heights and the peripheral surfaces 1c face each other. In FIG. 5, there is no gap between the vacuum heat insulating materials 1. That is, the peripheral surfaces 1c are in contact with each other in the vacuum heat insulating materials 1 adjacent to each other.

  When the vacuum heat insulating materials 1 are arranged side by side in the mode shown in FIG. 5, it is not necessary to bend the jacket material 3 constituting the sealing portion 4 in order to reduce the gap between the vacuum heat insulating materials 1. If it does so, the heat insulation performance of the vacuum heat insulating material 1 will not fall by the failure | damage of the covering material 3 resulting from the bending of the covering material 3. Therefore, in the heat insulation panel which arranged the vacuum heat insulating material 1 in the aspect shown in FIG. 5, favorable heat insulation performance can be obtained.

  The vacuum heat insulating material 1 used for this Embodiment has the sealing part 5 (refer FIG.1 and FIG.2). Since the covering material 3 constituting the sealing portion 5 is tilted so as to come into contact with the upper surface portion 71 of the cylindrical body 7 (see FIGS. 3B and 3C), the sealing portion 5 is constituted. The jacket material 3 has a bent portion (hereinafter, “folded portion of the jacket material 3 constituting the sealing portion 5” is also referred to as “folded portion of the sealing portion 5”). In the present embodiment, the bent portion of the sealing portion 5 on the peripheral surface 1 c of the vacuum heat insulating material 1 adjacent to each other is only in the middle position in the depth direction of the heat insulating core material 2. On the other hand, in the heat insulation panel using the conventional vacuum heat insulating material 50 shown in FIG. 7, the covering material 51 is formed by bending each sealing portion 52 along the peripheral surface 54 in order to reduce the gap between the vacuum heat insulating materials 50. The bent portion extends over the entire length of the heat insulation core member 53 in the depth dimension. That is, in the present embodiment, the regions where the bent portions of the sealing portion 5 on the peripheral surface 1c of the vacuum heat insulating material 1 adjacent to each other are formed are adjacent to each other in the heat insulating panel using the conventional vacuum heat insulating material 50. It is very small compared with the area | region where the bending site | part of the jacket material 51 in the surrounding surface 54 of the vacuum heat insulating material 50 is formed. For this reason, in this Embodiment, the risk of the damage of the jacket material 3 is a low thing compared with the past.

  FIG. 6 is a schematic view showing a state in which three vacuum heat insulating materials in FIG. 1 are arranged side by side in a manner different from that in FIG. In FIG. 6, it is the same as FIG. 5 except that the direction of the vacuum heat insulating material 1 in the middle of the three vacuum heat insulating materials 1 is different. That is, in FIG. 6, the vacuum heat insulating material 1 located in the middle has the sealing part 4 in the edge part of the both sides of a paper surface penetration direction, and does not have the sealing part 4 in a right-and-left edge part. Thus, in the three vacuum heat insulating materials in which the sealing portions 4 are arranged at different positions, there is no gap between the vacuum heat insulating materials in FIG.

  In the vacuum heat insulating material 1 used in the present embodiment, the sealing portion 4 is at a position along the surface 1a. Therefore, the same effect as the embodiment of FIG. Further, in the present embodiment, the vacuum heat insulating materials 1 are arranged in parallel so that the peripheral surface 1c of the vacuum heat insulating material 1 that does not have the sealing portion 4 faces the peripheral surface 1c of the vacuum heat insulating material 1 adjacent to the vacuum heat insulating material 1. Since it has installed, the fall of the heat insulation performance by heat | fever wraparound can be suppressed.

  As mentioned above, although embodiment of this invention was described, it is not limited to this embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in this embodiment, the vacuum heat insulating material is manufactured by using a single jacket material, but the vacuum heat insulating material is manufactured by a method such as arranging a heat insulating core material between two jacket materials. You can also Moreover, in this Embodiment, as shown in FIG.1 and FIG.2, although the sealing part 4 of the edge part on either side demonstrated the vacuum heat insulating material 1 in the position along the surface 1a, the sealing part 4 is a vacuum. If it exists in the peripheral part of the heat insulating material 1 and exists in the position along the surface 1a or the surface 1b, the position and number of the sealing parts 4 are not limited to the thing of embodiment. For example, you may make it the sealing part 4 have in the position along the surface 1a in the edge part of the four directions of the vacuum heat insulating material 1. FIG. You may make it the sealing part 4 have in the position along the surface 1b in the left-right edge part of the vacuum heat insulating material 1. FIG. The sealing part 4 is provided at a position along the surface 1a at one edge of the left and right edges of the vacuum heat insulating material 1, and the sealing part 4 is disposed at a position along the surface 1b at the other edge. You may make it have. In addition, in the present embodiment of FIG. 5 and FIG. 6, three vacuum heat insulating materials are described. However, the number of vacuum heat insulating materials 1 is not limited to this number. What is necessary is just to repeat the arrangement | sequence of the vacuum heat insulating material shown in FIG.

DESCRIPTION OF SYMBOLS 1 Vacuum heat insulating material 1a, 1b Surface 1c Peripheral surface 2 Heat insulating core material 3 Cover material 4, 5 Sealing part 10 Heat insulating panel

Claims (2)

In a vacuum heat insulating material configured to include a plate-shaped heat insulating core material and a jacket material that forms a sheet shape and is welded to each other at a peripheral edge portion to seal the heat insulating core material inside ,
About the said sealing part which protrudes from a surrounding surface, it provided in the position along the surface, The vacuum heat insulating material characterized by the above-mentioned.   A heat insulating panel comprising a plurality of the vacuum heat insulating materials according to claim 1, wherein the adjacent vacuum heat insulating materials are arranged in parallel at positions where the sealing portions are different from each other.

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