| 摘要 |
PURPOSE:To prevent the generation of an undesired operation state by permit ting the switching between stop, automatic control and manual control after the holding in stop or in the small flow rate state for a certain time when a blower operation selecting means which can be switched between the above- described three states is set into the automatic control. CONSTITUTION:The control mode is selected by shifting a blower 30 in the order of stop position, automatic control position, and a manual control position or in the reverse order by operating an operation mode selecting slider 68 in the A or B direction. Therefore, the operation of the operation mode selecting slider 68 passes through the automatic control position necessarily. The opera tion position signal Sq of the slider 68 is inputted into a control unit 80. The control unit 80 carries out operation, holding the blower 30 in stop or in the small air quantity state for a certain time even, if receiving the signal Sq representing the automatic control. Therefore, the proper operation can he carried out without reacting upon the transient passing through the automatic control position. |
