US 11,991,855 B2
System and method for measuring and controlling dust ingress in a particulate matter sensor in an information handling system
James D. Trim, Pflugerville, TX (US); Jace W. Files, Round Rock, TX (US); John T. Morrison, Round Rock, TX (US); and Sajjad Ahmed, Austin, TX (US)
Assigned to Dell Products L.P., Round Rock, TX (US)
Filed by DELL PRODUCTS, LP, Round Rock, TX (US)
Filed on Jan. 20, 2021, as Appl. No. 17/153,203.
Prior Publication US 2022/0232730 A1, Jul. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H05K 7/20 (2006.01); H05K 5/03 (2006.01)
CPC H05K 7/20209 (2013.01) [H05K 5/03 (2013.01); H05K 7/20172 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An information handling system, comprising:
a case having a case inlet and a case outlet;
a fan to cool the information handling system, the fan including a first fan inlet, a second fan inlet, and a fan outlet, the fan configured to draw air into the first and second fan inlets from the case inlet and to blow air out the fan outlet to the case outlet; and
a sensor device including a sensor inlet, a sensor outlet, a cover, and a linear actuator, wherein the sensor is coupled to the fan with the first fan inlet collocated with the sensor outlet such that air drawn into the first fan inlet is first drawn through the sensor inlet, wherein the cover is configured in a first position to cover the sensor inlet to permit no air flow through the sensor inlet and is configured in a second position to uncover the sensor inlet to permit air to flow through the sensor inlet, and wherein the linear actuator is configured in a first state to situate the cover in the first position and is configured in a second state to situate the cover in the second position.