| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat insulation box that can easily determine whether a closed space is properly filled with foamed polyurethane resin. <P>SOLUTION: In a closed space formed of an outer box 105 and an inner box 106, a small-space forming component 222 is provided which forms the small space communicating with the space outside the heat insulation box 102 through an air vent. The small-space forming component 222 is configured in such a manner that the foamed polyurethane resin 107 to be filled into the closed space can not enter the small space to reduce the small space with pressure by the foamed polyurethane resin 107 to be filled into the closed space, and a dielectric constant measured from outside the heat insulation box 102 changes in accordance with the size of the small space. When the filling state of the foamed polyurethane resin 107 is excellent, the small space of the small-space forming component 222 is sufficiently reduced and the dielectric constant of the small-space forming component 222 measured from outside the heat insulation box 102 corresponds to the size of the sufficiently reduced small space. <P>COPYRIGHT: (C)2013,JPO&INPIT |
