公开(公告)号：EP1510747A1

公开(公告)日：2005-03-02

申请号：EP03730754.3

申请日：2003-06-02

Applicant: MATSUSHITA REFRIGERATION COMPANY

Inventor： HIRAI, Yoshihide ,  HIRAI, Chie ,  TANIMOTO, Yasuaki ,  TSUNETSUGU, Keisuke ,  NAKAMA, Hiroto ,  AKEYAMA, Yukako

IPC: F16L59/06 ,  F25D23/06

CPC classification number: F16L59/065 ,  F25D23/065 ,  F25D2201/12 ,  F25D2201/14 ,  F25D2500/02 ,  Y10T428/231

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.