G - Physics – 01 – F
Patent
G - Physics
01
F
G01F 1/05 (2006.01) F24F 11/04 (2006.01) G01F 1/10 (2006.01) G01F 1/36 (2006.01)
Patent
CA 2418425
A fan powered by a controlled external energy source and a flow measurement device measure the airflow exiting or entering grilles/registers of an HVAC system without impeding the airflow being measured. A flow straightening element is preferably employed to overcome any effects of a non-uniform or swirled airflow profile on the tan. Preferably, the RPM of the fan is measured to determine the airflow. The RPM/flow calibration of the tan is insensitive to pressure differentials or the fan is a pressure-sensitive fan submitted to appropriate pressure differentials. Alternatively, the voltage or current supplied to the external energy source is used to determine the airflow. Finally, the pressure differential across the flow straightening element can be measured to determine airflow, eliminating the impact of pressure differential across the flow measurement device and fan.
Farmer Brian
Hageman Robert
Modera Mark Peter
Carrier Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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