| 摘要 |
PURPOSE:To greatly decrease the intruding heat by supporting an inner and outer containers heat insulative by a non-metal whose heat conductivity is relatively small and attaching a thin metal film whose heat reflecting factor is relatively good to the surface of the supporting body. CONSTITUTION:The space between the outer container 2 and the inner container 3 are evacuated for heat insulation, and an intermediate partition wall 4 for shileding heat radiation is provided. Liquid He is put in the container 3, and a super conductive device 9 is immersed. The inner container 3, intermediate partition wall 4, and the outer container 2 are supported by heat insulative supporting body 10. The supporing body 10 is composed of three parts, i.e., a high temperature side 11, a low temperature side 12, and intermedite temperature side 13. The part 13 is welded to the wall 4, and the temperature of the part 13 is kept at the same as the temperature of the wall 4. Synthetic resin is used for the supporting body and the low heat conductivity is maintained. Al and the like of about 50-5,000Angstrom are attached to the side of the supporting material 12 on the low temperature side and the heat is reflected. Then, the intruding heat can be greatly reduced, and the heat loss can be decreased. |
