|국가/구분||United States(US) Patent 등록|
|§371/§102 date||20040507 (20040507)|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 29 인용 특허 : 10|
An insulation box unit and a refrigerator of the present invention employs i) rigid urethane foam with a 8.0 MPa-or-greater bending modulus, and a 60 kg/m3-or-lower density, and ii) a vacuum insulation material. The proper bending modulus provides the insulation box unit with a substantial strength, even in the case that the coverage of the vacuum insulation material with respect to the surface of the outer box exceeds 40%. The proper density prevents the insulation box unit from poor insulation efficiency due to undesired solid thermal conductivity. D...
The invention claimed is: 1. An insulation box unit comprising: an inner box; an outer box accommodating the inner box therein; and an insulation layer disposed between the inner box and the outer box, the insulation layer comprising: a vacuum insulation material; and a rigid urethane foam that has a bending modulus of at least 8.0 MPa, and has a density of at most 60 kg/m3, and a coverage of the vacuum insulation material with respect to a surface area of the outer box is not less than 40% and not more than 80%, wherein the rigid urethane foam covers s...