Provided is a vacuum insulator having both an excellent insulating performance and an excellent bending strength. A vacuum insulator (1) is configured by a sack-shaped enveloping member (3) and at least one sheet (7) including a plurality of inorganic fibers and includes a core member (5) enclosed i
Provided is a vacuum insulator having both an excellent insulating performance and an excellent bending strength. A vacuum insulator (1) is configured by a sack-shaped enveloping member (3) and at least one sheet (7) including a plurality of inorganic fibers and includes a core member (5) enclosed in the enveloping member (3). The sheet (7) includes a plurality of bundled inorganic fibers (9) formed by bundling some inorganic fibers from among the plurality of inorganic fibers. At least a part of the bundled inorganic fibers (9) are in contact with each other.
대표청구항▼
1. A refrigerator comprising: an outer case;an inner case accommodated in the outer case;a refrigerating cycle; anda vacuum insulator disposed between the outer case and the inner case,wherein the vacuum insulator comprises: a sack-shaped enveloping member having a gas barrier property; anda core me
1. A refrigerator comprising: an outer case;an inner case accommodated in the outer case;a refrigerating cycle; anda vacuum insulator disposed between the outer case and the inner case,wherein the vacuum insulator comprises: a sack-shaped enveloping member having a gas barrier property; anda core member enclosed in the enveloping member, the core member including one or more sheets, each including a plurality of inorganic fibers,an inside of the enveloping member is decompressed, andat least one sheet of the one or more sheets comprises a plurality of bundled inorganic fibers formed by bundling some inorganic fibers from among the plurality of inorganic fibers, and at least a part of the bundled inorganic fibers are in contact with each other,wherein the at least one sheet comprises in the range of 10 to 200 bundled inorganic fibers per 1 cm3. 2. The refrigerator of claim 1, wherein the core member comprises an adsorbent enclosed in a sack having gas permeability. 3. The refrigerator of claim 1, wherein a periphery of each end of the enveloping member comprises sealed portions formed by fusing laminate films that constitute the enveloping member. 4. The refrigerator of claim 1, wherein a width of each of the bundled inorganic fibers is in the range of 0.1 to 2.0 mm, and a length of each of the bundled inorganic fibers is in the range of 10 to 100 mm. 5. The refrigerator of claim 1, wherein at least a part of the bundled inorganic fibers are in contact with other inorganic fibers, and an elongation direction of a contact portion between the part of the bundled inorganic fibers and the other inorganic fibers has a component in a direction of a thickness of the at least one sheet. 6. The refrigerator of claim 1, wherein an average length of the plurality of inorganic fibers is in the range of 15 to 50 mm. 7. The refrigerator of claim 1, wherein an average diameter of the plurality of inorganic fibers is in the range of 3 to 8 μm. 8. The refrigerator of claim 1, wherein an average value of weights of the sheet per unit area for each sheet before being enclosed in the enveloping member is in the range of 10 to 200 g/m2. 9. The refrigerator of claim 1, wherein at least a part of the inorganic fibers from among the one or more sheets enclosed in the enveloping member has a partially-curved shape. 10. The refrigerator of claim 1, wherein a direction having a larger tensile strength between a first direction and a second direction perpendicular to the first direction in a plane direction of the one or more sheets is set to be a longitudinal direction of the vacuum insulator. 11. The refrigerator of claim 1, wherein the plurality of inorganic fibers comprise one type selected from the group consisting of glass fibers, ceramic fibers, rock wool, basalt fibers, silica alumina fibers, silica fibers, and alumina fibers, or a mixture of two or more types thereof. 12. The refrigerator of claim 1, wherein the plurality of inorganic fibers comprise SiO2 in the range of 50 to 60 weight percent, CaO in the range of 15 to 25 weight percent, MgO in the range of 0 to 6 weight percent, Al2O3 in the range of 12 to 16 weight percent, B2O3 in the range of 8 to 13 weight percent, K2O in the range of 0 to 1 weight percent, and Na2O in the range of 0 to 1 weight percent (however, the sum of the content of SiO2, CaO, MgO, Al2O3, B2O3, K2O, and Na2O is 100 weight percent or less). 13. The refrigerator of claim 1, wherein the plurality of inorganic fibers are glass fibers fabricated by a continuous filament method. 14. The refrigerator of claim 1, wherein the glass fibers are formed of E glass. 15. The refrigerator of claim 1, wherein the core member includes a plurality of stacked sheets. 16. A vacuum insulator comprising: a sack-shaped enveloping member having a gas barrier property; anda core member enclosed in the enveloping member, the core member including one or more sheets, each including a plurality of inorganic fibers,wherein an inside of the enveloping member is decompressed, andwherein at least one sheet of the one or more sheets comprises a plurality of bundled inorganic fibers formed by bundling some inorganic fibers from among the plurality of inorganic fibers, and at least a part of the bundled inorganic fibers are in contact with each other, andwherein the at least one sheet comprises in the range of 10 to 200 bundled inorganic fibers per 1 cm3. 17. The vacuum insulator of claim 16, wherein the core member includes a plurality of stacked sheets. 18. A refrigerator comprising: an outer case;an inner case accommodated in the outer case to receive cooling air to cool an inside of the inner case; anda vacuum insulator disposed between the outer case and the inner case,wherein the vacuum insulator includes: an enveloping member having a gas barrier property; anda core member enclosed in the enveloping member and including at least one sheet having bundled inorganic fibers, andwherein a width of each of the bundled inorganic fibers is in the range of 0.1 to 2.0 mm, and a length of each of the bundled inorganic fibers is in the range of 10 to 100 mm.
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이 특허에 인용된 특허 (1)
Lewis,Albert, High temperature glass fiber insulation.
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