BLOWER

PROBLEM TO BE SOLVED: To provide a blower using an axial flow fan, that can produce a continuous air flow which hardly changes the strength thereof.SOLUTION: The blower includes: a frame body 22 of a short tubular shape, both ends of which in the axial direction are opened; the axial flow fan 21 having a vane part 23 composed of a plurality of vanes 25 which is disposed on the outside of the frame body 22; and an annular casing 26 disposed on the inside of the frame body 22, wherein the frame body 22 serves as a rotor 28, a stator 27 is annularly disposed in the annular casing 26, an electric motor 29 is formed with the rotor 28 and the stator 27, at the same time, a circulation space P through which a secondary air current Vs produced in accordance with a main air current Vm produced by the vane part 23 is circulated is formed and, thereby, the secondary air current Vs flows to mitigate the strength of the primary air current Vm. As the result, the continuous compounding air flow Vc which hardly changes the strength thereof can be provided and, at the same time, a factor which hinders the secondary air current Vs flowing through the circulation space P can be excluded as much as possible and consequently the secondary air current Vs flows smoothly.