| 摘要 |
PURPOSE: A double window is provided to achieve ventilation effect and selectively control the natural lighting and shading because a gap is formed between inner and outer window sashes and a blind is installed in the gap. CONSTITUTION: A double window(100) comprises an inner window sash and an outer window sash which are installed in a window frame(210) provided on a building wall to face the indoor side and the outdoor side of the building respectively. The outer window sash comprises an upper window(120) and a lower window(130) which linearly move up and down on the same line and interlock with each other to move in opposite directions. |
