| 摘要 |
PURPOSE: A ventilation device for a window is provided to solve noise problems caused by the operation of a fan and increase the amount of air filtered by a filter. CONSTITUTION: A ventilation device includes a body unit and a suction device (300). The body unit is mounted on a window frame of a window. The suction device sucks internal air and external air to the inside of the body unit. The suction device includes a cylinder-shaped filter (330), a ring-shaped negative pressure duct (320), and a fan device (310). The negative pressure duct is connected to an internal hollow of a filter and generates negative pressure in the center. The fan device supplies the internal air to the inside of the negative pressure duct. |
