| US 7,571,582 B2 | ||
| Vacuum heat insulator, method of manufacturing the same, and refrigerator using the same | ||
| Yoshihide Hirai, Otsu (Japan); Chie Hirai, Otsu (Japan); Yasuaki Tanimoto, Nishinomiya (Japan); Keisuke Tsunetsugu, Mino (Japan); Hiroto Nakama, Tondabayashi (Japan); and Yukako Akeyama, Ikoma (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Appl. No. 10/514,809 PCT Filed Jun. 02, 2003, PCT No. PCT/JP03/06915 § 371(c)(1), (2), (4) Date Nov. 17, 2004, PCT Pub. No. WO03/102460, PCT Pub. Date Dec. 11, 2003. |
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| Claims priority of application No. 2002-160656 (JP), filed on May 31, 2002; application No. 2002-163954 (JP), filed on Jun. 05, 2002; application No. 2002-163956 (JP), filed on Jun. 05, 2002; application No. 2002-163957 (JP), filed on Jun. 05, 2002; application No. 2002-165814 (JP), filed on Jun. 06, 2002; and application No. 2002-192615 (JP), filed on Jul. 01, 2002. | ||
| Prior Publication US 2005/0175809 A1, Aug. 11, 2005 | ||
| Int. Cl. E04C 2/54 (2006.01); B32B 1/04 (2006.01); B32B 3/02 (2006.01) | ||
| U.S. Cl. 52—784.15 [428/69] | 32 Claims |
| 1. A vacuum heat insulator comprising:
a molded plate-shaped core having an aggregate comprising fibers and a binding agent for curing the fiber aggregate, and
an exterior cover enclosing the core in a chamber defined by the exterior cover, the chamber having a pressure lower than
a pressure outside the chamber,
wherein the fibers have an average fiber diameter between 0.1 μm and 10 μm,
voids defined by the fibers have a void diameter of at most 40 μm,
the core comprises at least 90% said voids defined by the fibers, and
a difference in thickness of the core between when the core is subjected to the pressure outside the chamber and when the
core is subjected to the pressure inside the chamber is at most 10%.
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