Patent ID: 6079627
Filing Date: 2000-06-27
Classification: F24F,G01F

Abstract:
A method of accurately measuring airflow across a measuring location within a heating, ventilation, and/or air conditioning system comprising the steps of:measuring airflow at the measuring location using two or more airflow measuring stations, the areas of the measuring stations together equaling the area of the measuring location, the airflow measuring step includingmeasuring total airflow across the measuring location through a first airflow measuring station during a low airflow condition at the measuring location,measuring total airflow across the measuring location through all airflow measuring stations during a high airflow condition at the measuring location, andcontrolling at least one airflow control device to selectively vary the airflow through the airflow measuring stations based upon the measured airflow across the measuring location, whereinthe at least one airflow control device includes a first control device associated with the first measuring station and a second control device associated with a second measuring station, the controlling step further includingopening only the first control device during the low airflow condition across the measuring location, andclosing the first control device and opening the second control device during an intermediate airflow condition across the measuring location.