JPH07113492A - Vacuum insulating member - Google Patents

Abstract

PURPOSE:To provide a vacuum insulating member which prevents the generation of the trouble such as a warp and bending-down and can reduce the rate of defective and a manhour, as for a plate-shaped body which constitutes a core material. CONSTITUTION:As for a vacuum insulating member 1 which is constituted so that a plate-shaped molded body 3 made of heat insulating core material is inserted into an armor body 5 which has an airtight chamber 4 inside, and the airtight chamber 4 is vacuum-exhausted, a rib 2 is formed at least on one between the obverse and reverse surfaces of a plate-shaped molded body 3, and the rib 2 is formed along the side formation direction of the plate-shaped molded body 3, and further formed over the center part of the plate-shaped molded body 3.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a cryogenic container, a refrigerator,
The present invention relates to a vacuum heat insulating material which is attached to a leisure cooler or the like to exert a heat insulating effect.

[0002]

2. Description of the Related Art As shown in FIG. 5, this type of vacuum heat insulating material 1
Is a plate-like molded body 3 formed by pressing powder such as silica or perlite into a kraft paper bag or an air-permeable bag such as a non-woven fabric and then pressing it into a certain shape, or open-celled phenolic foam or the like. A synthetic resin foam molded into a plate shape is used as a heat insulating core material, which is housed in an outer casing 5 made of a plastic laminate film, and the inside of the airtight chamber formed therein is evacuated, and then the outer casing 5 is formed. Is manufactured by fusion-sealing the opening. And such a vacuum heat insulating material is highly valuable as a high performance heat insulating material.

[0003]

However, in the case of using a powder-shaped plate-shaped molded body as the heat insulating core material,
Since this molding uses only the cohesive force of the powder, the bending strength of the plate-shaped molded body is weak.When using this to make a vacuum heat insulating material, warping or bending of large or thin panels is possible. However, there is a drawback that problems such as collapse occur. Also, when an open-cell synthetic resin foam is used, since it is a lightweight body, the bending strength is weak and the same problem occurs. That is, the plate-shaped molded body itself is apt to cause a problem such as warping or bending, and in the manufacturing process of the vacuum heat insulating material, the shape retention of the molded body is poor, and the same problem may occur. Furthermore, in general, when a plate-shaped molded body is housed in an exterior body and the interior of the exterior body is evacuated to produce a heat insulating material, the back surface of the plate-shaped molded body formed into a flat plate comes into close contact with the exterior body. And there are no voids,
There is a problem that it takes time to evacuate. Therefore, various problems have occurred, such as occurrence of defects due to warpage and bending in the manufacturing process, increase in man-hours, and the like.

Therefore, an object of the present invention is to obtain a vacuum heat insulating material which is less likely to cause problems such as warping and bending in a plate-shaped molded body which constitutes a core material and which can reduce the defective rate and the number of steps. It is in.

[0005]

To achieve this object, the vacuum heat insulating material according to the present invention is characterized in that a plate-shaped molded body of a heat insulating core material is inserted into an exterior body forming an airtight chamber therein. , In the vacuum heat insulating material whose vacuum chamber is evacuated,
There is a rib on at least one of the front surface and the back surface of the plate-shaped molded body, and the operation and effect are as follows.

[0006]

That is, by using a plate-shaped molded body having ribs as the heat insulating core material of the vacuum heat insulating material, warping or bending does not occur even in a vacuum heat insulating material of a large panel or a thin panel, and higher performance is achieved. It has become possible to create vacuum insulation materials with commercial value. Further, conventionally, when handling the plate-shaped molded body in the manufacturing process, the occurrence of defects due to bending, etc. was seen, but in the present invention, due to the reinforcing effect of the ribs, handling of the plate-shaped molded body is simplified. It has become possible to reduce the defect rate and man-hours. Further, when manufacturing the vacuum heat insulating material, even in the vacuuming process, the ribs of the present application are housed in the outer body with the bottom surface side, so that the vacuuming can be performed from the bottom surface side, and the vacuuming time can be shortened. Therefore, the working efficiency could be improved.

[0007]

As a vacuum heat insulating material, therefore, the panel can be made larger and thinner, and the vacuum heat insulating material itself has a large bending strength, so that defects such as warping, bending, and collapse are less likely to occur in the manufacturing process. A vacuum insulation material could be obtained. Further, even when the molded body is inserted into the exterior body and evacuated, the rib forming side is brought into contact with the exterior body to perform the work, and when the bottom surface side is formed, a gap is created between the exterior body and the molded body. It was possible to evacuate from the side as well, and it was possible to perform work efficiently and to improve manufacturing efficiency.

[0008]

Embodiments of the present application will be described with reference to the drawings. FIG. 1 shows a perspective view of a vacuum heat insulating material 1 of the present application, and FIG. 2 shows a configuration of a plate-shaped molded body 3 integrally formed with ribs 2 used in the vacuum heat insulating material 1. .

First, the structure of the vacuum heat insulating material 1 will be described with reference to FIG. This vacuum heat insulating material 1 has an airtight chamber 4 inside.
The plate-shaped molded body 3 as a heat-insulating core material is inserted into the exterior body 5 forming the, and the airtight chamber 4 is evacuated.
That is, in manufacturing, a plate-shaped molded body 3 having a rectangular parallelepiped shape as shown in FIG. 2 is housed in a sheet-shaped plastic laminate film which is a pair of upper and lower outer casings 5,
The airtight chamber 4 in the exterior body 5 is evacuated in a vacuum chamber (not shown) equipped with a heating device, and the opening 6 is fusion-sealed to obtain a vacuum heat insulating material 1 as shown in FIG. It is formed. Here, the plate-shaped molded body 3 is one in which powder such as silica or perlite is put into a kraft paper bag or a breathable bag such as a non-woven fabric and then formed into a certain shape by pressing, or an open-cell phenol foam or the like. The above-mentioned open-cell synthetic resin foam is molded into a plate shape. That is,
In such a product, the plate-shaped molded body 3 itself is a porous material having air permeability, and can exhibit high heat insulation performance.

The rib 2 which is a characteristic configuration of the present application will be described below. As shown in FIG. 1, in the vacuum heat insulating material 1 of the present application, ribs 2 are provided on the front and back of the plate-shaped molded body 3. The ribs 2 are arranged so as to cross in a direction along the side forming direction of the plate-shaped molded body 3 and pass through the central portion of the plate-shaped molded body 3. The rib 2 is provided integrally with the plate-shaped molded body 3. When the powder is stored in a bag to form the plate-shaped molded body 3, the rib 3 has an outer protruding portion 3 as a rib forming portion.
It is manufactured by integrally forming with a. On the other hand, in the case of an open-cell synthetic resin foam, the molding die itself has ribs 2.

When the ribs 2 are provided in this way, warpage occurs when the plate-shaped molded body 3 itself is manufactured, when the plate-shaped molded body 3 is transported, and when the plate-shaped molded body 3 is manufactured in a vacuum chamber.
It is possible to prevent defects such as bending and collapsing. on the other hand,
In the conventional molded body, when the vacuum is applied to the outer casing, the bottom surface of the plate-shaped molded body and the outer casing are in intimate contact with each other, and the vacuum cannot be evacuated from the bottom surface. By arranging 2 on the bottom surface side and accommodating it in the exterior body 5, a gap is created between the bottom surface of the plate-shaped molded body 3 and the exterior body 5, and it becomes possible to evacuate from the bottom surface side. It is shortened.

[Other Embodiments] Other embodiments of the present application are listed below. (A) In the above-mentioned embodiment, the example in which the ribs 2 are provided on both the front and back surfaces of the plate-shaped molded body 3 is shown, but this may be provided on one surface. However, it is preferable to provide them on both sides as a reinforcing effect. Further, in the above-described embodiment, the example in which the cross-shaped ribs 2 are provided on both the front and back sides is shown, but it is also possible to make the shape different on both the front and back sides. The ribs on the other side may be provided in a letter shape as diamond-shaped ribs provided over the center positions of the respective sides. (B) Further, the number of ribs can be arbitrarily set according to the size and thickness of the panel. FIG. 4 shows an example in which a single linear rib is provided. (C) The cross-sectional shape of the rib is a semi-cylindrical shape in the embodiment, but may be any shape as long as it exerts the effect as a rib, for example, a trapezoidal shape that widens toward the body side of the molded body, and is not particularly limited. It is not something that will be done. (D) As a rib forming method, in the case of a molded body made of powder, as shown in the above-mentioned embodiment, a bag for storing powder is preliminarily worked to form the rib to form a molded body. Is effective. (E) Further, in the above embodiment, an example in which the rib is integrally formed with the plate-shaped molded body has been shown. However, as shown in FIG. Alternatively, a composite molded body structure may be combined with the conventional plate-shaped molded body 3. In this case, the rib material may be the same material as or different from the material of the molded body, and the equipment conventionally provided can be used as it is. Further, for example, it is conceivable to mix fibers into the ribs or to increase the density of the ribs. (F) Further, when the heat insulating core material is a powder compact, it is preferable to use a strong open-celled inorganic porous body such as a calcium silicate compact as the rib material.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a perspective view of a vacuum heat insulating material of the present application.

FIG. 2 is a diagram showing a configuration of a plate-shaped molded body in which ribs are integrally molded.

FIG. 3 is a diagram showing an example of using a rib forming member that is separate from the plate-shaped molded body.

FIG. 4 is a diagram showing another configuration example of ribs.

FIG. 5 is a diagram showing a structure of a conventional vacuum heat insulating material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum heat insulating material 2 Rib 3 Plate-shaped molded body 4 Airtight chamber 5 Exterior body 20 Rib forming member

Claims (5)

[Claims] 1. A plate-shaped molded body (3) of a heat insulating core material is inserted into an exterior body (5) which forms an airtight chamber (4) therein, and the airtight chamber (4) is evacuated. A vacuum heat insulating material, comprising a rib (2) on at least one of the front surface and the back surface of the plate-shaped molded body (3). 2. The vacuum heat insulating material according to claim 1, wherein the heat insulating core material is made of a porous material having open cells. 3. The rib (2) is provided along the side forming direction of the plate-shaped molded body (3) and across the central portion of the plate-shaped molded body (3).
The vacuum insulation material described. 4. The vacuum heat insulating material according to claim 1, wherein the ribs (2) are formed integrally with the plate-shaped molded body (3) when the plate-shaped molded body (3) is produced. . 5. The plate-shaped molded body (3) in which the rib (2) is formed.
Is a separate rib forming member (20), and when the plate-shaped molded body (3) is inserted into the exterior body (5) and evacuated, the plate-shaped molded body (3) and The vacuum heat insulating material according to claim 1, which is produced by combining with the rib forming member (20).