| 摘要 |
PROBLEM TO BE SOLVED: To provide a uniform air outlet unit having simple structure in which the area of air outlet and the size of a rotary impeller generating a spiral flow are not required to be adjusted from part to part. SOLUTION: A ventilation resistor 3 comprising a honeycomb plate having a large number of wall bodies intersecting in the spiral direction and passing air in the axial direction or a filter folded in zigzag to form wall bodies is disposed just in front of a rotary impeller 2 generating a spiral flow on the air discharging side and porous plates 4, 5 each having a uniform porosity over the entire surface are disposed further in front thereof on the air discharging side while being spaced apart slightly. |
