JPH09317044A - Composite insulation - Google Patents

Abstract

(57) Abstract: A composite heat insulating material formed by combining two or more heat insulating materials, even if one of the heat insulating materials forming the composite heat insulating material is formed into a flat plate. The object of the present invention is to produce a composite heat insulating material that can be formed by closely following the shape and unevenness of the joint surface of the structure and forming a close contact between the composite heat insulating material and the joint surface of the structure. SOLUTION: In the case of a composite heat insulating material formed by combining two or more kinds of heat insulating materials, when one of the heat insulating materials forming the composite heat insulating material is formed into a flat plate, it locally deforms to the outermost layer. A soft heat insulating material is provided, and a flat heat insulating material is provided inside the soft heat insulating material, and both heat insulating materials are combined to form a composite heat insulating material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite heat insulating material, and more particularly to a structure of a composite heat insulating material constructed by combining two or more kinds of heat insulating materials.

[0002]

2. Description of the Related Art As an example in which a plurality of heat insulating materials are used in combination, an outer wall made of steel plate and an inner wall made of plastic in a refrigerator / freezer are disclosed, for example, in Japanese Unexamined Patent Publication No. 5-272864. There is disclosed a structure in which a vacuum heat insulating panel is arranged between the two and filled with polyurethane to form a heat insulating wall. In addition, as another example, the actual Kaihei 5-9
As seen in Japanese Patent No. 6694, a heat insulating material is arranged in a space inside the heat resistant cover, a heat resistant layer having excellent heat resistance is arranged on the high temperature side of the heat insulating material, and the inside of the cover is evacuated to vacuum. A structure for forming a vacuum heat insulating material is disclosed.

[0003]

In the above-mentioned prior art, in the structure in which the vacuum heat insulating panel is arranged in the two-sided wall and the space in the two-sided wall is filled with polyurethane to form the heat insulating wall. The vacuum insulation panel is flat. Therefore, when the wall that joins the vacuum heat insulating panel is not flat, for example, when the wall is curved or flat and has unevenness, a gap is created between the vacuum heat insulating panel and the wall. It is necessary to fill the gap with a second insulation, for example a foam insulation as in the prior art. However, it is expected that the foam insulation cannot be applied when the foam insulation cannot be used, for example, when the insulation is inexpensive and nonflammable. In the example of Japanese Utility Model Publication No. 5-96694, a vacuum heat insulating material is formed by combining a heat insulating material and a heat resistant layer. In this heat insulating material, a cover is in close contact with the heat insulating material and the heat resistant layer by an external pressure, and a curved surface is formed. Also, it is difficult to join in correspondence with the unevenness of the wall.

An object of the present invention is to provide a composite heat insulating material formed by combining two or more kinds of heat insulating materials, even if one of the heat insulating materials forming the composite heat insulating material is formed into a flat plate. The object of the present invention is to provide a composite heat insulating material which can be formed by closely following the shape and unevenness of the joint surface of the structure and deforming the composite heat insulating material and the joint surface of the structure.

[0005]

The above object is a composite heat insulating material formed by combining two or more kinds of heat insulating materials, and one of the heat insulating materials forming the composite heat insulating material is formed into a flat plate. , A soft heat insulating material that is easily deformed locally is arranged in the outermost layer, and a flat heat insulating material is arranged inside the soft heat insulating material. By combining both heat insulating materials, a composite heat insulating material is formed. It is achieved by forming.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a sectional view of a structure to which the present invention is applied. In the figure, 1 is a composite heat insulating material, 2 and 3 are plate-like heat insulating materials forming the composite heat insulating material 1, soft heat insulating materials, and 4 are structures. In this embodiment, first, a soft heat insulating material 3 is glued (not shown) on the surface of the structure 4 (for example, the body of a railway vehicle) formed of the frame and the plate or the shape, for example, the interior surface. It is arranged using. Next, using a plate-shaped heat insulating material 2 on the indoor surface of the soft heat insulating material 3 in the same manner with an adhesive (not shown), as shown in FIG. 1, the heat insulating material 2a, the heat insulating material 2b, the heat insulating material. It is arranged so that 2c are in contact with each other. Here, the soft heat insulating material 3 is arranged so that the entire surface is in contact with the surface of the structure 4. As the plate-shaped heat insulating material 2, a material that is harder than the soft heat insulating material 3 but is superior in performance as a heat insulating material, for example, thermal conductivity, to the soft heat insulating material 3 is selected. Further, the plate-shaped heat insulating material 2 is arranged on the soft heat insulating material 3 such that the plate-shaped heat insulating material 2 is in contact with the soft heat insulating material 3 over the entire surface.
This is performed by pressing a part of the soft heat insulating material 3 to such an extent that it is deformed. As a result, the hard plate-shaped heat insulating material 2 can be arranged even if there are irregularities on the surface of the structure 4.
When the structure 4 is a curved surface, the width of the hard plate-shaped heat insulating material 2 is
The length of the composite heat insulating material 1 can be adjusted appropriately so that the composite heat insulating material 1 can follow the curved surface as a whole through the soft heat insulating material 3.
Further, as a method of causing the composite heat insulating material 1 to follow the curved surface of the structure 4, it is also possible to adjust the thickness of the soft heat insulating material 3, that is, increase or decrease the thickness in accordance with the size of the radius of curvature. . As the type of the soft heat insulating material 3, one having a fiber as a base material is considered. As the hard plate-shaped heat insulating material 2, a plate-shaped material formed by foaming, a vacuum heat insulating material in which a core material is inserted into an outer packaging material and then the inside is evacuated can be considered.
As a result, the composite heat insulating material 1 can freely select the hard plate-like heat insulating material 2 having excellent heat insulating properties and dispose it on the structure 4 having a curved surface, as compared with the case where only the soft heat insulating material 3 is supported. As a result, the thickness can be reduced. Therefore, when the external dimensions of the structure 4 are the same, the ratio of the internal volume can be increased.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a plan view of a vacuum heat insulating material, which is an example of the case where a vacuum heat insulating material is used for the hard plate-like heat insulating material 2 shown in the first embodiment. In the figure, 5 is a vacuum heat insulating material, and 6 is an outer packaging material that constitutes the vacuum heat insulating material 5. Reference numeral 7 denotes a heat seal portion of the outer packaging material 6 for holding the inside of the outer packaging material 6 in vacuum in the vacuum heat insulating material 5. Reference numeral 8 is a core material inserted into the outer packaging material 6 of the vacuum heat insulating material 5. In the present embodiment, with respect to the outer packaging material 6, first, the heat-sealing portion 7a on the three sides, the heat-sealing portion 7b, and the heat-sealing portion 7c are sealed. On the other hand, the core material 8 is divided into a plurality of pieces in the outer packaging material 6 as shown in FIG. Here, when the core material 8 is a powder, the powder to be used is put into a breathable bag-shaped sheet and divided into widths and lengths that can correspond to the curved surface of the structure 4 in the same bag-shaped sheet. Next, the core material 8 is attached to the outer packaging material 6
After being inserted into the inside and evacuated, the heat sealing portion 7d on one side where the outer packaging material 6 remains is sealed. As a result, FIG.
The number of the plate-shaped heat insulating materials 2 shown in 1 is reduced. Therefore, with respect to the plate-shaped heat insulating material 2, it is possible to reduce the manufacturing cost and the installation work cost for the structure 4.

Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a plan view of the vacuum heat insulating material in another structural example of the vacuum heat insulating material shown in the second embodiment. In the figure, 9 is a vacuum heat insulating material, and 10 is an outer packaging material that constitutes the vacuum heat insulating material 9. Reference numeral 11 denotes a heat seal portion for holding the inside of the outer packaging material 10 in vacuum in the vacuum heat insulating material 9.
Reference numeral 12 is a core material to be inserted into the outer packaging material 10 of the vacuum heat insulating material 9. In this embodiment, the outer packaging material 10 is first processed in the widthwise direction, the longitudinal ends, and the inside in order of heat-sealing portion 11a, heat-sealing portion 11b, and heat-sealing portion 11c. That is, as shown in FIG. 3, only the both ends in the width direction are left and the heat sealing portion is sealed. On the other hand, as shown in FIG. 3, the core material 12 is manufactured to have a size that can be arranged in the space between the heat-sealed portions of the outer packaging material 10. Here, when the core material is powder, the powder to be used is put in a breathable bag-shaped sheet. Next, the core material 12 is inserted into the divided space of the outer packaging material 10, and after vacuum evacuation, the heat-sealed portion 11d on one remaining side of the outer packaging material 10 is sealed. As a result, the plate-shaped heat insulating material 2 shown in FIG.
This means that the vacuum area is divided into multiple parts. For this reason, even if the vacuum heat insulating material 9 is damaged at any place and the vacuum state cannot be maintained, it can be localized and the performance deterioration of the vacuum heat insulating material can be suppressed.

According to the present invention, the soft heat insulating material arranged in the outermost layer causes local unevenness of the joint surface of the structure and difference in surface shape between the heat insulating material of the flat plate and the joint surface of the structure. Since it absorbs and deforms, even if one of the heat insulating materials forming the composite heat insulating material is formed of a flat plate, the composite heat insulating material deforms following the shape and unevenness of the joint surface of the structure, and the composite heat insulating material is deformed. It becomes possible to form the material and the joint surface of the structure in close contact with each other. Therefore, even when the composite heat insulating material is formed by combining a flat plate or a high-performance heat insulating material that is difficult to deform, it is possible to provide a structure in which the joint surface of the composite heat insulating material and the structure are in close contact with each other.

[0010]

As described above, according to the present invention, 2
In a composite heat insulating material formed by combining more than one kind of heat insulating material, even if one of the heat insulating materials forming the composite heat insulating material is formed into a flat plate, the composite heat insulating material has a shape and unevenness of a joint surface of a structure. It is possible to manufacture a composite heat insulating material which can be formed by closely adhering the composite heat insulating material and the joint surface of the structure.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a composite heat insulating material according to the present invention.

FIG. 2 is a plan view showing another embodiment of the composite heat insulating material according to the present invention.

FIG. 3 is a plan view showing still another embodiment according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Thermal insulation material, 2 ... Thermal insulation material, 3 ... Soft thermal insulation material, 4 ... Structure, 5,9 ... Vacuum thermal insulation material, 6, 10 ... Outer packaging material, 7, 11
... Heat-sealed part, 8, 12 ... Core material.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazufumi Yamaji 794 Azuma Higashitoyo, Shimomatsu City, Yamaguchi Prefecture Inside the Kasado Plant, Hitachi, Ltd. Company Hitachi Ltd. Kasado Plant (72) Inventor Kazunori Yanagisawa 1-280, Higashikoigakubo, Kokubunji, Tokyo Inside Hitachi Design Laboratory

Claims (7)

[Claims] 1. A composite heat insulating material composed of a combination of two or more heat insulating materials, wherein a soft heat insulating material which is easily deformed locally is arranged in the outermost layer, and the soft insulating material is locally disposed inside the outermost layer. ,
A composite heat insulating material, wherein a heat insulating material having a rigidity higher than that of the outermost layer heat insulating material is disposed, and the plurality of heat insulating materials are combined to form an integrated heat insulating material. 2. The composite heat insulating material according to claim 1, wherein the heat insulating material disposed inside the outermost layer is a flat plate. 3. The composite heat insulating material according to claim 1 or 2, wherein the heat insulating material disposed inside the outermost layer is a vacuum heat insulating material. 4. The composite heat insulating material according to claim 3, wherein the vacuum heat insulating material disposed inside the outermost layer is independently divided into a plurality of pieces. 5. The composite heat insulating material according to claim 3, wherein the vacuum heat insulating material disposed inside the outermost layer is composed of the same outer packaging material, and the core material is divided into a plurality of pieces inside the outer packaging material. It is a composite heat insulating material. 6. The composite heat insulating material according to claim 5, wherein the core material is independently divided into a plurality of pieces inside the same outer packaging material. 7. The composite heat insulating material according to claim 1 or 2, wherein the heat insulating material disposed inside the outermost layer is made of a foam material.