Method, apparatus and system for safely and efficiently controlling a ventilation hood
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United States of America Patent
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Nov 7, 2000
Grant Date -
N/A
app pub date -
Apr 15, 1999
filing date -
Apr 15, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides a method, apparatus and system for safely and efficiently controlling a ventilation hood having at least one blower unit disposed within a hood. The blower unit operates at a first speed which is substantially below a threshold speed when a speed controller is in a first setting and a sensor does not detect a trigger condition. The blower unit also operates at or above the threshold speed when the speed controller is in a first setting and the sensor detects the trigger condition. In addition, the blower unit operates at or above the threshold speed when the speed controller is in a second setting, and deactivates when the speed controller is in a third setting.
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