PROBLEM TO BE SOLVED: To reduce the cost in a main body without increasing pressure loss.SOLUTION: The ion generator is arranged including electrostatic atomization means 21a and 21b that generate ion in a control circuit case 22 to blow out the ion from an outlet 4 of a grille 5 into a room. Since the electrostatic atomization means 21a and 21b are disposed in a control circuit case 22 which is located out of an air blow path in the main body 1, the number of fire-resistant components in the main body 1 can be reduced without increasing the pressure loss.
