| 摘要 |
PURPOSE:To pre-ionize a discharge space section between a pair of main electrodes uniformlly by constituting a corona electrode by inserting a first conductor at the central section of a dielectric and mounting a second conductor onto the outer circumferential surface of the dielectric. CONSTITUTION:In a corona electrode 7, a metallic wire 15 is inserted at the central section of a tubular dielectric 14 as a first conductor while a metallic wire 16 is wound spirally on the outer circumferential surface of the dielectric 14 as a second conductor. The first metallic wire 15 is connected to one main electrode 5 and the second metallic wire 16 to the other main electrode 5. Consequently, corona discharge is generated near the second metallic wire 16 by large potential difference among the dielectric 14 and the metallic wires 15, 16. Accordingly, a section between a pair of the main electrodes 5 in a discharge space section can be pre-ionized uniformly. |
