| 摘要 |
PROBLEM TO BE SOLVED: To save electric power, increase a wind quantity, and reduce nhoise by arranging a box body having a suction space part between a suction port and a propeller fan, and a wind passage for blowing air oiut from a centrifugal diffuser wind passage to an inside of a room, and arranging a wind passage which is crossed with a blow-out wind passage and which is communicated with the suction space part from an outside of the box body. SOLUTION: When a propeller fan 2 is rotationally driven, air in the room is sucked from a suction opening part 14a of a decorative grill 14, and it is also sucked from a duct flange 13 since a suction duct 12 is communicated with a suction space part 41. Air sucked from the suction space part 41 by the propeller fan 2 receives force toward an axial direction and the diameter direction by rotation of the propeller fan 2, and it flows by converting speed energy of flow from the axial direction toward the diameter direction into static pressure by a fan casing 5, a second wind path member 4, and a first wind path member 3. Namely, flow is changed to 90 degrees by the centrifugal diffuser wind path 9 so as to increase static pressure. It is thus possible to increase a wind quantity of the propeller fan 2, it is possible to reduce noise, and it is also possible to improve an efficiency. |
