| 摘要 |
Two flow passages are provided for allowing the passage of air sent out from a blower in the same direction individually and discharging the air to outside. An ion generation unit for generating positive ions by only corona discharge is arranged at one flow passage, and an ion generation unit for generating electrostatic atomized water particles with negative polarity by electrostatic atomizing phenomenon is arranged at the other flow passage. A throttle is provided at the one flow passage for making the wind speed of air flowing through the one flow passage faster than the wind speed of air flowing through the other flow passage. Since positive ions having shorter lifetime are emitted more than electrostatic atomized water particles with negative polarity having longer lifetime, the balance between positive and negative polarities in the air can be sustained over a long period of time. |
