| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a possibility of condensation being produced on the surface of a panel decorative part, ensure excellent heat insulation effect, and facilitate assembling and recycling. SOLUTION: An expandable synthetic resin sealing member 8 is joined between a rib formed on an upper surface of a folded part 14B folded from an outer periphery of a panel decorative part 14 and a rib 15a of a panel closure part 15 to ensure a sealing property between the sealing member and a top plate. An air layer A is sealed with the panel decorative part 14, the panel closure part 15, and the sealing member 8. Since no convection is produced in the air layer A, a predetermined temperature gradient is formed from the surface of the panel decorative part 14 up to the panel through the air layer A, and hence the surface of the panel decorative part 14 is kept at temperature near temperature of blown cooling temperature. Further, the cooling air is not stored in the air layer A in accordance with the length of the time that the surface of the panel decorative part 14 is kept at the blown cooling air temperature. |
