| 摘要 |
PROBLEM TO BE SOLVED: To prevent thermal deformation when solar radiation is received by arranging plural heat radiating projections on the obverse and the reverse of an outdoor side section of a heat insulating section. SOLUTION: An outdoor side section 2 and an indoor side section 3 composed of an extruded section such as aluminum alloy are connected to each other by a heat insulating resin connecting member 4, and a heat insulating section 1 is constituted. The section 2 is formed in a hollow shape, and a large number of projecting strap pieces 5 running in the lengthwise direction are arranged on an indoor side surface 2a and a hollow part inside surface 2b. In the section 1, since the sections 2 and 3 are insulated from each other by the heat insulating connecting member 4, a thermal movement between the inside and outside sections is checked, and influence of an outdoor air temperature to an indoor air temperature is restrained. When the section 2 receives solar radiation, its heat is radiated from the projecting strap pieces 5, and is diffused from an opening part on the upper end of the section 1 together with air entering hollow parts 6 and 7 from an opening part on the lower end of the section 1. Therefore, an excessive temperature rise in the outdoor side section is prevented, and thermal deformation of the heat insulating section can be prevented, and a heat radiating projection can be easily formed, and rigidity can also be improved. |
