| 摘要 |
<p>The present invention pertains to a system (10) for directing air flow in a fume hood (12) having a sash (14). The system (10) comprises a mechanism (16) for producing an output control signal corresponding to a desired flow of air through the sash (14) of the fume hood (12). The producing mechanism (16) comprises a producing CPU (24) which actively produces the output control signal. The producing mechanism (16) is to be disposed in fluid communication with the fume hood (12). The system also comprises a mechanism (16) for controlling air flow through the sash (14) of the fume hood (12) corresponding to the output control signal. The controlling mechanism is connected to the producing mechanism (16) to receive the output control signal. The controlling mechanism (18) comprises a controlling CPU which actively produces a drive signal for operating the controlling mechanism (18) corresponding to the output control signal.</p> |
