| 摘要 |
<p>PROBLEM TO BE SOLVED: To sufficiently prevent condensation of moisture in an outer side surface, by making each clearance minimize a heat transfer to an inner side chamber from the atmosphere, and minimizing condensation of atmospheric moisture in an outer side wall. SOLUTION: Four walls 28, 44, 48, 52 parallelly arranging a vessel 14 are provided. Adjacent each paired wall has a clearance forming a space mutually between the walls. In these walls, an inner side wall 28, outer side wall 52 and at least two partitioning walls 44, 48 arranged therebetween are included, and an inner side chamber is formed in the inner side wall. The outer side wall is exposed in the environmental atmosphere. Closing means 37, 38, 39, 41, 54, arranged in an end edge of the wall to confine gas by the atmospheric pressure substantially in each space, are provided. Each clearance is selected to minimize a heat transfer to the inner side chamber from the atmosphere, and to minimize condensation of atmospheric moisture in the outer side wall.</p> |
