| 摘要 |
PURPOSE: A door frame for easily ventilating a room is provided to automatically discharge exhaust gas if fires break out in the room. CONSTITUTION: A door frame for easily ventilating a room is as follows. A permanent magnet grounding strap is formed on one side of a movable frame(14). An electromagnet grounding strap(29) formed in the movable frame is earthed. The permanent magnet grounding strap is formed in a stop bar(23). Each electromagnet grounding strap is formed on both sides of the movable frame. The permanent magnet grounding strap is formed in a fixed window frame(13). The window is opened and closed by electric force of the electromagnet grounding strap. |
