| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilator having a function of discharging indoor air to the outside, a function of taking indoors the outside air after purification and a function of cleaning the inside air. SOLUTION: A casing 1 which is set to a building body is opened at the indoor side and the outdoor side. Two openings 2, 3 are formed at the indoor side, one of which being provided with a propeller fan 6. An opining 5 at the outdoor side is provided with a shutter 10 which can be opened and closed. The shutter 10 is opened at the time of ventilation, and the shutter 10 is closed at the time of cleaning air. Air is permitted to flow indoors from one of the two openings 2, 3 at the indoor side through an air filter 8 coping with the rotational direction of the propeller fan 6. |
