| 摘要 |
The present invention relates to a double window system capable of preventing dew condensation and improving a thermal insulation performance by being applied with a double window structure in which a window frame has an inner T-T window and an outer project window coupled therein. According to the present invention for the above effect, a double window system comprises: a window frame (110); a project window (120) installed on the outdoor side of the window frame (110) to be opened or closed; and a tilt-and-turn (T-T) window (140) installed on the indoor side of the window frame (110) to be opened or closed, wherein the project window (120) and the T-T window (140) have a space therebetween. The double window system is capable of preventing dew condensation and improving a thermal insulation performance by being applied with a double window structure in which the window frame has the inner T-T window and the outer project window coupled therein. In addition, the double window system is capable of easily discharging air through the opened project window when the air is heated in the space between the outer window and the inner window during indoor cooling in summer, thereby improving cooling efficiency. |
