| 摘要 |
The invention is directed to a method and apparatus for controlling airflow in a given direction in an air circulating system in which the method comprises the steps of: (a) placing a motor driven fan in the air circulating system in such a manner that the fan, when driven by the motor, creates pressure in a direction opposing the given direction of airflow, and (b) activating the motor to drive the fan to cause the airflow moving in said given direction to be diminished because of said opposing pressure. The apparatus is directed to an air flow controllable register for controlling a flow of air through the register from a register air flow supply duct in response to an externally provided control signal that commands differing airflow rates through the register. More specifically, the air flow controllable register includes a register flow control unit that includes a rotary mounted fan positioned within the register airflow supply duct. The fan is coupled to a motor. The fan when driven by the energized motor creates air pressure from the fan to reduce the flow of air from the supply duct.
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