The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 2009
Filed:
Jun. 02, 2003
Yoshihide Hirai, Otsu, JP;
Chie Hirai, Otsu, JP;
Yasuaki Tanimoto, Nishinomiya, JP;
Keisuke Tsunetsugu, Mino, JP;
Hiroto Nakama, Tondabayashi, JP;
Yukako Akeyama, Ikoma, JP;
Yoshihide Hirai, Otsu, JP;
Chie Hirai, Otsu, JP;
Yasuaki Tanimoto, Nishinomiya, JP;
Keisuke Tsunetsugu, Mino, JP;
Hiroto Nakama, Tondabayashi, JP;
Yukako Akeyama, Ikoma, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A vacuum heat insulator according to the present invention includes a core molded to be plate-shaped with the use of a binding agent. The vacuum heat insulator assumes any one of the following configurations. A) The core is formed by curing a fiber aggregate by means of a binding agent. The fibers have an average fiber diameter of at least 0.1 μm but at most 10 μm, and voids defined by fibers have a void diameter of at most 40 μm. The core has a percentage of the voids of at least 80%. B) The binding agent is varied in concentration in a through-thickness direction of the core. C) A cured layer solidified by the binding agent is formed on at least one side surface of the core. D) The core contains fibers having a length of at most 100 μm. The fibers are oriented perpendicular to a direction of heat transmission. Such vacuum heat insulator is excellent in adiabatic property. Refrigerators, to which such a vacuum heat insulator is applied, are made small in size, or have a large inner volume, or contribute to energy saving.