| 摘要 |
PROBLEM TO BE SOLVED: To provide a blower device which can be used by switching a function as a suction blower and a function as a pressure-sending blower.SOLUTION: A blower device 30 comprises: a blower main body 31 which sucks and discharges air; a suction passage 32 which connects a suction side 31a of the blower main body 31, a suction port 30a and a second suction port 30b; and a discharge passage 38 which connects a discharge side 31b of the blower main body 31 and a discharge port 30c. At the suction passage 32, there arranged a suction-side branch passage 35 connected to an outside air take-in port 36, and suction-side changeover valves (first to third changeover valves 33, 34 and 37) which switch suction destinations between and among the first suction port 30a, the second suction port 30b and the outside air take-in port 36. At the discharge passage 38, there are arranged a discharge-side branch passage 40 connected to an exhaust port 41, and discharge-side changeover valves (fourth to fifth changeover valves 39, 42) which switch discharge destinations between the discharge port 30c and the exhaust port 41. |
