The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 2021
Filed:
Mar. 15, 2017
Applicant:
Koninklijke Philips N.v., Eindhoven, NL;
Inventors:
Ruifeng Xue, Eindhoven, NL;
Rui Ke, Eindhoven, NL;
Shan Zhu, Eindhoven, NL;
Shuang Chen, Eindhoven, NL;
Assignee:
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F24F 11/32 (2018.01); F24F 3/16 (2021.01); G01N 27/409 (2006.01); F24F 11/30 (2018.01); G01N 27/66 (2006.01); F24F 110/50 (2018.01); F24F 110/64 (2018.01);
U.S. Cl.
CPC ...
F24F 11/32 (2018.01); F24F 3/1603 (2013.01); F24F 11/30 (2018.01); G01N 27/409 (2013.01); G01N 27/66 (2013.01); F24F 2003/1614 (2013.01); F24F 2110/50 (2018.01); F24F 2110/64 (2018.01); Y02A 50/20 (2018.01);
Abstract
An air purifier comprise a gas filter between an upstream air flow and a downstream air flow and a concentration sensor comprising a first electrode and a second electrode, the first electrode being exposed to the upstream air flow and the second electrode exposed to the downstream air flow, the concentration sensor providing an output signal based on the difference in concentrations of a target gas at the first and second electrodes. The output signal is processed to determine information relating to the condition of the gas filter.