摘要 |
<p>A method and apparatus for generating positive and negative ions, the method comprising: generating ac high voltage; providing different polarity of the high-voltage to at least one pair of ionizing electrodes (1, 1a) mounted in separate conducting cages (2, 2a) located adjacent to each other, each of the cages provided with an opening opposite the electrode; balancing ion currents emitted by each of the electrodes by providing a balancing unit (8), output from the ac high voltage being via the balancing unit to the electrodes, each electrode provided with different polarity; and generating an external electric field by using the ion current from each electrode across to the cage in which the electrode is mounted, passing through an element for producing a voltage drop (5, 6, 5a, 6a, 10), whereby some of the ions generated from the electrodes escape outside the cages due to the presence of electric field between the cages.</p> |