| 摘要 |
PROBLEM TO BE SOLVED: To enable a user to increase and decrease generation of negative ions at choice. SOLUTION: An operating part 27 and a display part 12 for displaying the mount of generation of negative ions are provided. The operating part 27 has, at least, an ion running switch 31 for running and stopping an ion generator 20, and an ion increasing/decreasing switch 32 for increasing and decreasing the amount of generation of negative ions. |
