| 摘要 |
PURPOSE:To eliminate a shaft power loss, by installing a small capacity motor for fan driving separately from a constant-speed motor, while connecting an interval between the constant-speed motor and a fan free of separate operation via a shaft coupling provided with a wheel, and coupling the small capacity motor with this wheel via a power transmission device. CONSTITUTION:A small capacity motor 3 for fan driving is installed separately from a constant-speed motor 1, while a rotary shaft 4 of the constant-speed motor 1 and a rotary shaft 5 of a fan 2 are connected together of separate operation via a shaft coupling 7 provided with a wheel 6, and a belt 8 transmitting power between the wheel 6 and the small capacity motor 3 is installed as well. With this constitution, motor driving in case of the desired air quantity is made performable so that watt consumption is sharply reducible. |
