公开(公告)号：US11280705B2

公开(公告)日：2022-03-22

申请号：US16471184

申请日：2017-12-25

申请人： KONINKLIJKE PHILIPS N. V.

发明人： Jacob Dijkstra ,  Timothy Van Der Graaf ,  Einte Holwerda

IPC分类号： G01N1/22 ,  F24F11/39 ,  G01N15/06 ,  G01N33/00 ,  F24F8/10 ,  F24F110/50 ,  F24F110/66 ,  G01N15/00 ,  F24F8/99

摘要： An air purification system is provided which includes measurement of a concentration of a target pollutant within the air. A gas sensor is used for sensing a concentration of the pollutant (although it will detect other pollutants as well due to cross-sensitivity). A filter is provided which selectively removes the target pollutant while having a significantly smaller effect in reducing other pollutants to which the sensor is cross-sensitive. A gas sensor response is obtained before filtering, a gas sensor response after filtering, and the sensitivity characteristics of the gas sensor to the pollutant are processed, thereby to determine a gas concentration of the pollutant in the air before filtering. In this way, the concentration measurement is better than a direct measurement with the gas sensor as a result of a low selectivity of the gas sensor.