| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation device for adjusting a blow-off state and for performing blow-off without being affected by the shape of a chair or a floor surface, suppressing resistance in suction, and appropriately coping with both suction and blow-off. SOLUTION: An air flow-guiding means 12 is provided at the hollow part of a device body 11, and is moved to change the guide state of air flow, thus changing the size of resistance when the air flow flows from space to be air- conditioned to a duct 51 in the case of suction, achieving efficient suction as a state where the resistance becomes small, at the same time preventing the going-straight of the air flow from the duct 51 by adjusting the air flow-guiding means 12 in the case of blow-off for setting an appropriate blow-off state regardless of the shape of the lower portion of a chair 40 and a floor 50, and appropriately coping with both of suction and blow-off and efficiently air-conditioning the space to be air-conditioned. |
