Method and device for measuring airflows through HVAC grilles

Details Method and device for measuring airflows through HVAC grilles Method and device for measuring airflows through HVAC grilles

2007-02-13

2007-02-13

Thompson, Jewel (Department: 2855)

Measuring and testing

Volume or rate of flow

Reexamination Certificate

active

11176167

ABSTRACT:
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 fan. Preferably, the RPM of the fan is measured to determine the airflow. The RPM/flow calibration of the fan 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.

REFERENCES:
patent: 4523478 (1985-06-01), Zacharias, Jr.
patent: 4877183 (1989-10-01), Matsuda et al.
patent: 5295397 (1994-03-01), Hall et al.
patent: 5533668 (1996-07-01), Erikson
patent: 5564626 (1996-10-01), Kettler et al.
patent: 5606111 (1997-02-01), Pilie et al.
patent: 5641340 (1997-06-01), Kagan
patent: 6079627 (2000-06-01), Kettler
patent: 6186179 (2001-02-01), Hill
patent: 6415617 (2002-07-01), Seem
patent: 6431127 (2002-08-01), Weber
patent: 6439468 (2002-08-01), Lambert et al.
patent: 6460356 (2002-10-01), Tao et al.
patent: 6514721 (2003-02-01), Spurrell
patent: 6516785 (2003-02-01), Nakada et al.
patent: 6643128 (2003-11-01), Chu et al.
patent: 6655207 (2003-12-01), Speldrich et al.
patent: 6772714 (2004-08-01), Laird et al.
patent: 6923072 (2005-08-01), Modera et al.

Affiliated with

Also associated with

Rating

Method and device for measuring airflows through HVAC grilles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and device for measuring airflows through HVAC grilles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for measuring airflows through HVAC grilles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3821052