| 摘要 |
<p>A bi-directional axial-flow blower which requires no complex mechanism such as a rotor-reversing mechanism and employs a proper shape of rotor to enables air-blowing operation with high efficiency and low noise both in the forward and reverse directions. The bi-directional axial-flow blower (1) for selectively sending a wind either in forward direction (A) or in a reverse direction (B), comprises a cylindrical casing (3), a forwardly-rotating impeller (8) and a reversely-rotating impeller (9) having airfoil blade rotors (8a, 9a) with camber, and a forward drive motor (6) for driving the forwardly-rotating impeller (8) and a reverse drive motor (7) for driving the reversely-rotating impeller (9), in which the forwardly-rotating impeller (8) is operated whereas the reversely-rotating impeller (9) is made free to rotate when the blower (1) is in the forward wind mode, and the reversely-rotating impeller (9) is operated and the forwardly-rotating impeller (8) is made free to rotate in the reverse wind mode. <IMAGE></p> |
