| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation device capable of sufficiently securing sealability of an opening while miniaturizing the device.SOLUTION: In a ventilation device 10, a ventilation portion 20 has an outdoor-side opening 16 and an indoor-side opening 18. A blade portion 26 is disposed in an air flow channel from the outdoor-side opening 16 to the indoor-side opening 18. A lifting mechanism is rotatably fixed at an indoor side and moves the blade portion 26. The lifting mechanism lifts the blade portion 26 on an initial position in a direction to close the indoor-side opening 18, and the indoor-side opening 18 can be closed by the blade portion 26 at a closing position.SELECTED DRAWING: Figure 5 |
