JP5280302B2 - Vacuum insulation panel and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum insulating panel, reducing a risk of release of a sealed state when in use. <P>SOLUTION: A core material 3 is accommodated in a cylindrical body made of a metallic material. A panel member 2 is formed so as to sandwich the core material 3 by compressing the cylindrical body. A vacuum insulating panel 1 is formed through evacuation after both end edges are connected to be sealed. The panel member 2 includes a folded-back part in which a side edge other than the connected part is intruded inside. The core material 3 is arranged inside the panel member 2 and made up of first and second core materials having ends respectively situated on both sides of the folded-back part, and a third core material situated in the folded-back part. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vacuum heat insulation panel and a method for manufacturing the same.

  2. Description of the Related Art Conventionally, a vacuum heat insulating panel having a configuration in which an internal space formed by folding a metal plate material in half and welding three sides is evacuated (see, for example, Patent Document 1).

  However, in the said conventional vacuum heat insulation panel, it is necessary to weld three orthogonal sides, processing work is troublesome and takes time. Moreover, since the welding range is wide, there is a high risk of leakage (releasing the sealed state). Furthermore, when it is necessary to bend the vacuum heat insulation panel according to the application, any of the welded parts is always located there. For this reason, an unreasonable force acts on the welded portion, and the sealed state may be eliminated.

JP 2003-65490 A

  An object of the present invention is to provide a vacuum heat insulating panel that is excellent in sealing workability and can sufficiently cope with deformation processing after completion, and a method for manufacturing the same.

As a means for solving the above problems, the present invention provides:
Vacuum insulation panels,
A core material is accommodated in a cylindrical body made of a metal material, a panel member is formed by compressing the cylindrical body and sandwiching the core material, and sealing is performed by joining both end edges and then vacuuming ,
The panel member forms a folded portion in which side edge portions other than the joint portions of the both end edge portions have entered inside,
The said core material is arrange | positioned inside the said panel member, and is comprised from the 1st core material and 2nd core material which are each located in the both sides of the folding | turning part, and the 3rd core material located in the said folding | turning part ; It is a thing.

With this configuration, it is possible to reduce the number of joined portions and suppress problems such as leakage. Furthermore, not only can the heat insulation performance be improved, but the thickness can be made uniform over the entire region despite the formation of the folded portion and the placement of the third core material.

  The panel member may be bent at a position excluding the joint portion at both end edges.

  With this configuration, the width of the deformable shape is widened, and various forms can be flexibly handled.

  The core material is preferably composed of a flexible material.

  With this configuration, the core material does not become an obstacle when the panel member is deformed. Moreover, since the core material smoothly follows the deformed shape of the panel member, the heat insulating performance is not impaired by the deformation.

  The core material has a thickness that is the same as or substantially the same as the thickness formed by the third core material and the folded portion, which is disposed between the first core material and the second core material. It is preferable to further include 4 core members.

  With this configuration, the heat insulation performance can be further enhanced, and the entire thickness can be made uniform.

  According to the present invention, since the panel member can be formed only by compressing after the core material is accommodated in the cylindrical body, a vacuum heat insulating panel can be obtained easily and inexpensively. Moreover, since the cylindrical body has openings only at both ends, it is possible to suppress the joining range of the opening portions after the panel member is formed. Therefore, it is possible to reduce the risk of the sealed state being released during subsequent use.

It is a perspective view of the vacuum heat insulation panel concerning a 1st embodiment. It is a perspective view which shows the state which deform | transformed the vacuum heat insulation panel of FIG. 1 into the cylindrical shape. It is a perspective view which shows the manufacturing process of the vacuum heat insulation panel of FIG. It is a perspective view which shows the manufacturing process of the vacuum heat insulation panel of FIG. It is a partial section perspective view showing a part of processing state of a vacuum heat insulation panel concerning a 2nd embodiment. It is a partial section perspective view showing a part of processing state of a vacuum heat insulation panel concerning a 3rd embodiment. It is a partial section perspective view showing a part of processing state of a vacuum heat insulation panel concerning a 4th embodiment. It is a fragmentary front sectional view showing a part of processing state of a vacuum heat insulation panel concerning a 5th embodiment.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In the following description, terms indicating specific directions and positions (for example, terms including “up”, “down”, “side”, “end”) are used as necessary. In order to facilitate understanding of the invention with reference to the drawings, the technical scope of the present invention is not limited by the meaning of these terms. Further, the following description is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(First embodiment)
FIG. 1 shows a vacuum heat insulation panel 1 according to the first embodiment. This vacuum heat insulation panel 1 is comprised by the panel member 2 and the core material 3 accommodated in the inside.

  As shown in FIGS. 3 and 4, the panel member 2 is formed into a flat plate shape by crushing a thin cylindrical body 4 made of a metal material such as stainless steel (for example, SUS304). The cylindrical body 4 can be obtained by joining both sides of a flat thin plate by welding or the like to form a cylinder, or by making it cylindrical from the beginning by extrusion or the like. As shown in FIG. 3A, if the cylindrical body 4 is cylindrical from the beginning, there is no break and the possibility of occurrence of leaks or the like due to subsequent processing can be greatly reduced. Here, the panel member 2 having a thickness of 0.2 mm is used.

  The core material 3 is made of a heat insulating material having flexibility such as glass wool, ceramic wool, rubber, synthetic resin, ceramic and the like in a flat plate shape. The core material 3 is evacuated while being sandwiched by the panel member 2, thereby forming a heat insulating space in the panel member 2. Here, the core material 3 having a thickness of 3 mm is used.

  Then, the processing method of the vacuum heat insulation panel 1 which consists of the said structure is demonstrated.

  As shown in FIG. 3C, the core material 3 formed in a flat plate shape is inserted from either one of the both end openings of the cylindrical body 4 shown in FIG. At this time, since the width dimension of the insertable core material 3 is about ½ of the circumferential length of the cylindrical body 4, the cylindrical body 4 is previously flattened into a flat shape as shown in FIG. It is preferable to keep it. A getter (not shown) is inserted. The getter plays a role of increasing the degree of vacuum, for example, sucking a gas generated in the internal space after evacuation to be described later.

  When the insertion of the core material 3 into the cylindrical body 4 is completed, the cylindrical body 4 is crushed to form a flat plate as shown in FIG. 4 to form the panel member 2. In this state, the regions that are the openings at both ends become opposing surfaces that contact each other, and the contact portions are joined to these opposing surfaces by welding or the like.

  When the plate-like body is completed in this way, the internal space is evacuated through the exhaust pipe 2 a connected to a part of the panel member 2. As a vacuuming method, a vacuum may be directly connected to the exhaust pipe 2a for suction, or the entire panel member 2 may be inserted into a vacuum furnace. After evacuation, the exhaust pipe 2a is sealed with pressure. Thereby, the vacuum heat insulation panel 1 is completed.

  Next, the operation of the vacuum heat insulating panel 1 having the above configuration will be described.

  The vacuum heat insulation panel 1 can be used, for example, as a heat insulating material such as a side surface, a back surface, a door, etc. of a refrigerator while maintaining a flat plate shape. Moreover, the vacuum heat insulation panel 1 can be employ | adopted for various uses by bending appropriately in the position except a junction part. For example, if it is bent into a cylindrical shape, it can be used around the inner container of the electric pot.

(Second Embodiment)
FIG. 5 shows a vacuum heat insulation panel 1 according to the second embodiment. The vacuum heat insulation panel 1 is different from the configuration of the first embodiment in that the core material 3 is composed of the first core material 5 and the second core material 6, and the folded portions 7 are provided on both sides. The point is different in that the third core material 8 is disposed in the folded portion 7.

  The vacuum insulation panel 1 is manufactured as follows. That is, first, the flat plate-like first core material 5 and the second core material 6 are accommodated in the cylindrical body 4. And the cylindrical body 4 is crushed from the direction orthogonal to the front and back of each core material 5 and 6. FIG. At this time, both sides of the cylindrical body 4 are pushed in to form the folded portion 7 that enters between the core members 5 and 6. In this case, the folding dimension of the folded portion 7 may be in a range until the tips of the folded portions 7 come into contact with each other. Since the opening portion is seam welded, it is preferable that the folded portion 7 is folded back to a position where the tips of the folded portions 7 contact each other. However, in the case where a space is formed between the tips of the folded portions 7, a spacer (not shown) may be inserted in consideration of ease of seam welding. Moreover, the 3rd core material 8 is arrange | positioned at each folding | turning part 7, respectively. Subsequently, the panel member 2 is formed by crushing the cylindrical body 4 into a flat plate shape. Thereafter, in the same manner as in the first embodiment, the vacuum insulation panel 1 is completed by evacuating and pressure-sealing the exhaust pipe 2a.

  In the vacuum heat insulation panel 1 thus completed, the creepage distance can be increased by the folded-back portions 7 formed on both side edges. Moreover, the third core material 8, which is a heat insulating material, is disposed in the folded portion 7. Therefore, even if it is a both-sides edge part, it can be set as the structure excellent in heat insulation.

(Third embodiment)
FIG. 6 shows a vacuum heat insulation panel 1 according to the third embodiment. The vacuum heat insulation panel 1 differs from the vacuum heat insulation panel 1 according to the second embodiment in that a fourth core material 9 is provided between the first core material 5 and the second core material 6.

  That is, when the cylindrical body 4 is compressed and the panel member 2 is formed, the fourth core material 9 has a thickness dimension (the first core material 5, the first core material 5, 2 core material 6, 3rd core material 8, and the sum total of the thickness of the panel member 2 which comprises the folding | turning part 7) are the thickness dimensions (1st core material 5 and 2nd core material 6) in another area | region. , The total thickness of the front and back surfaces of the fourth core material 9 and the panel member 2). Thereby, it can be set as uniform thickness over the whole area | region of the vacuum heat insulation panel 1, it is excellent in an external appearance, the dispersion | variation in heat insulation is eliminated, and it becomes a convenient structure.

(Fourth embodiment)
FIG. 7 shows a vacuum heat insulation panel 1 according to the fourth embodiment. This vacuum heat insulation panel 1 differs from the vacuum heat insulation panel 1 according to the third embodiment in that it has a brazing material 10 housed in the tubular body 4 and used for welding of the opening.

  That is, the sheet-like brazing material 10 made of copper foil or aluminum foil is disposed on the entire inner surface of the cylindrical body 4. The brazing material 10 is squeezed between the inner surfaces facing each other at the opening edge by crushing the cylindrical body 4 to form the flat panel member 2. And the inner surfaces which the opening edge part opposes are joined by heating.

  In addition, although the 1st core material 5 and the 2nd core material 6 were each located in the internal space located in the both sides of the folding | returning part 7, a spacer (not shown) is provided between the folding | returning parts 7 of both sides. It is also possible to arrange the brazing material 10 (radiation prevention material) on both sides. Thereby, the welding state in this part can be made still better. Further, when the clad material in which the surface layer of the brazing material 10 is formed on the inner peripheral surface side of the cylindrical body 4 is used, the sheet-shaped brazing material 10 becomes unnecessary.

(Fifth embodiment)
FIG. 8 shows a vacuum heat insulation panel 1 according to the fifth embodiment. The vacuum heat insulation panel 1 is different from the third or fourth embodiment in that the folded portion 7 is formed only on one side edge portion to become the connection receiving portion 11, and the other side edge portion is only the fourth core material 9. Is different in that the connecting portion 12 protrudes with a narrow width.

  The vacuum heat insulation panel 1 having the above-described configuration is suitable for use by connecting a plurality of sheets. That is, the connection part 12 of a certain vacuum heat insulation panel 1 is connected to the connection receiving part 11 of another vacuum heat insulation panel 1, and this connection part is joined by welding or the like (however, the connection part 12 is positioned at the connection receiving part 11). Just do it.) Thereby, any number of sheets can be connected continuously without changing the thickness at the connection part. The vacuum heat insulation panel group formed in this way can be used for heat insulation in a wide range such as a large refrigerator or a plant. In this case, it is convenient because the individual vacuum heat insulation panels 1 can be transported and assembled on site.

  The vacuum heat insulation panel 1 according to the present invention is excellent in processability and has a structure in which the heat insulation performance is not easily impaired. Therefore, in addition to household appliances such as an electric pot, a refrigerator, and a rice cooker, a large facility such as a plant. It can be used widely.

DESCRIPTION OF SYMBOLS 1 ... Vacuum insulation panel 2 ... Panel member 3 ... Core material 4 ... Cylindrical body 5 ... 1st core material 6 ... 2nd core material 7 ... Folding part 8 ... 3rd core material 9 ... 4th core material 10 ... Brazing material 11 ... Connection receiving part 12 ... Connection part

Claims (6)

A core material is accommodated in a cylindrical body made of a metal material, a panel member is formed by compressing the cylindrical body and sandwiching the core material, and sealing is performed by joining both end edges and then vacuuming ,
The panel member forms a folded portion in which side edge portions other than the joint portions of the both end edge portions have entered inside,
The core material is arranged inside the panel member, that Do from the first core and the second core member end portion is located on both sides of the folded portion, and the third core member positioned in the fold-back portion A vacuum insulation panel characterized by that.   2. The vacuum heat insulating panel according to claim 1, wherein the panel member is bent at a position excluding a joint portion at both end edges.   The vacuum heat insulating panel according to claim 1, wherein the core material is made of a flexible material. The core material is disposed between the first core material and the second core material, and has a thickness that is the same as or substantially the same as the thickness formed by the third core material and the folded portion. The vacuum heat insulation panel according to any one of claims 1 to 3 , further comprising: The vacuum heat insulation panel according to any one of claims 1 to 4 , wherein the panel member has a sheet-like brazing material disposed at a joint portion and sealed by welding. The said panel member is provided with the folding | returning part only in one side edge part except a junction part, The other side edge part was inserted in the folding part of the other panel member, and it was joinable. The vacuum heat insulation panel of any one of 5 to 5 .

Images