A system and method for measuring a concentration of a pollutant within a gas

一种污染物、空气净化系统的技术，应用在气体中的污染物水平领域

Pending Publication Date: 2019-09-13
KONINKLJIJKE PHILIPS NV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The solution may be affected by rapid changes in VOC levels due to human activity during differential gas level measurement

Method used

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  • A system and method for measuring a concentration of a pollutant within a gas
  • A system and method for measuring a concentration of a pollutant within a gas
  • A system and method for measuring a concentration of a pollutant within a gas

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Embodiment Construction

[0045]The present invention provides an air purification system that includes measurement of the concentration of target pollutants in the air. Gas sensors are used to determine the concentration of target pollutants (however due to cross-sensitivity they will also respond to other pollutants). A filter is provided that selectively filters target contaminants while having the significantly less effect of reducing other contaminants to which the sensor is cross-sensitive. Therefore, the filter has no or no significant effect on reducing other pollutants. The gas sensor response obtained before filtering, the gas sensor response after filtering, and the sensitivity characteristic of the gas sensor to the pollutant are processed to determine the gas concentration of the pollutant in the air before filtering. In this way, concentration measurement is superior to direct measurement using gas sensors due to the low selectivity of gas sensors.

[0046] Figure 1A An example of an a...

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Abstract

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.

Description

technical field [0001] The present invention relates to sensing levels of pollutants in gases such as air. Background technique [0002] Indoor air pollution poses a serious health hazard in many urban areas around the world. Sources of air pollution are encountered both outdoors (eg, from motor vehicles and industry) and indoors (from cooking, smoking, burning candles, burning incense, outgassing building / decoration materials, use of outgassing waxes, paints, polishes, etc.). Indoor pollution levels are often higher than outdoors, especially VOCs. At the same time, many people spend most of their time indoors and thus may be exposed to almost constant levels of unhealthy air pollution. [0003] One way to improve indoor air cleanliness is to install indoor air purifiers that continuously recirculate the indoor air through a cleaning unit that includes one or more air filters, or utilizes adsorption, chemisorption, conversion or break down. Examples are activated carbon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F3/16F24F11/64F24F11/88G01N33/00G01N1/22F24F110/66F24F8/99
CPCG01N1/2273F24F11/30F24F2110/50F24F2110/66G01N1/2205G01W1/00G01N2015/0046G01N15/06G01N2015/0662G01N33/0011F24F8/99Y02B30/70G01N15/01F24F11/39G01N33/0047
Inventor J·迪杰克斯特拉T·范德格拉夫E·霍尔维达
Owner KONINKLJIJKE PHILIPS NV
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