AXIAL FLOW BLOWER AND AIR CONDITIONER USING THIS BLOWER

PURPOSE:To attain good assembly workability, miniaturization and power saving by achieving reduction of noise due to a vortex, generated between a mouth ring and blades of an axial fan, and a high air pressure CONSTITUTION:Disk-shaped mouth rings 4, 5 for partitioning suction and delivery sides are vertically fixed further with a distance D spaced, to an internal surface of a cylindrical case 3, to hollow most of a delivery side surface of the mouth ring in the downstream to a vertical or suction side, and an axial fan 1 is mounted on the inside of the mouth rings 4, 5. Throttle riseup parts 4a, 5a parallelly folded to the internal surface of the case 3 are provided in internal peripheral sides of the mouth rings 4, 5, and a space in point ends of these throttle riseup parts 4a, 5a serves as an opening part 8 of a bag-shaped space part 6 interposed by the mouth rings 4, 5. A vortex 7, generated in the periphery of a blade 1a by rotating the axial fan 1, is sucked into the bag- shaped space part 6 from the opening part 8, to eliminate a reverse flow toward the blade from the delivery side surface, and a noise due to this reverse flow is reduced to increase an air amount.