| 摘要 |
PROBLEM TO BE SOLVED: To provide a warning device, which can surely warn a user so as to suitably handle an equipment. SOLUTION: When it is judged prescribed times (S76: YES) the total using time of the electrostatic filter of an air cleaner exceeds fixed time (S74: YES), the volume of a warning voice to be generated later is increased (S82). When that judgement is further continuously performed prescribed times, the contents of the warning voice are changed (S86). Thus, the attention of the user of an air cleaner 1 can be easily called and the alarm to the user can be more surely transmitted. |
