US 12,346,177 B2
Self-calculating filter fouling thresholds
Eric Tunks, Austin, TX (US); Donnie W. Gerhart, Leander, TX (US); and Seth Law, Oxford (GB)
Assigned to Dell Products L.P., Round Rock, TX (US)
Filed by Dell Products L.P., Round Rock, TX (US)
Filed on Jul. 13, 2022, as Appl. No. 17/863,523.
Prior Publication US 2024/0019916 A1, Jan. 18, 2024
Int. Cl. G06F 1/20 (2006.01); G08B 21/18 (2006.01); H05K 7/20 (2006.01)
CPC G06F 1/206 (2013.01) [G08B 21/182 (2013.01); H05K 7/20136 (2013.01); H05K 7/20209 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An information handling system comprising:
an information handling resource;
an air mover configured to drive air to cool the information handling resource; and
a management controller including a thermal control system to control the air mover and configured to:
detect an indication that a clean air filter has been installed in the information handling system and, responsive to detecting the indication:
configure the air mover to operate at a predetermined filter testing speed;
measure an airflow within the information handling system while a speed of the air mover is equal to the predetermined filter testing speed;
determine a clean filter baseline airflow based on the airflow driven within the information handling system responsive to the predetermined filter testing speed;
calculate a threshold filter failure airflow based on the clean filter baseline airflow; and
periodically execute filter fouling tests, wherein during each filter fouling test, the thermal control system is configured to:
set the speed of the air mover to the predetermined filter testing speed;
determine a resulting airflow within the information handling system responsive to the predetermined filter testing speed;
compare the resulting airflow to the threshold filter failure airflow; and
communicate an alert responsive to the resulting airflow being below the threshold filter failure airflow.