| 摘要 |
<p>A water tray (90) is divided by a partition wall (91) into a downstream part (92) subjected to an air pressure on a downstream side of an air cleaning filter unit (30) and an upstream part (93) subjected to an air pressure on an upstream side of the air cleaning filter unit (30). The downstream part (92) and the upstream part (93) are made to communicate with each other through a water passage hole (95) on lower part of the partition wall (91). A differential pressure between the upstream side and the downstream side of the air cleaning filter unit (30) increases according to increase in a rotation velocity of a fan (20), a water level in the downstream part (92) is thereby increased, so that a quantity of water drawn up by bucket parts (61) can automatically be adjusted.</p> |
