Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1995-11-16
1997-04-29
Snay, Jeffrey
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
422 90, 422114, 55497, G01N 2700, G01N 2712
Patent
active
056246390
ABSTRACT:
A gas detecting device for a vehicle includes a casing which is formed therein with an air passage having an air inlet and an air outlet located above the air inlet. A filter is provided in the air passage below and downstream of a gas sensor. The filter has a lower end surface at a side of the air inlet and an upper end surface at a side of the gas sensor. The lower end surface of the filter works as an air-passing surface through which the air flows into the filter, while the upper end surface of the filter works as an air-passing surface through which the air flows out of the filter. A certain gap is provided between a lower portion of a side surface of the filter and an inner wall surface of the casing defining the air passage so that this lower portion of the filter also works as an air-passing surface through which the air flows into the filter. A labyrinth structure may be provided in the air passage between the air inlet and the filter for causing the air to meander at the labyrinth structure. Further, it may be arranged that the air passage has an opening area which is the greatest at the air inlet and then is gradually reduced as advancing toward the labyrinth structure.
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Ariga Katsuhiko
Hattori Hideo
Nishimura Hiroaki
Nippondenso Co. Ltd.
Snay Jeffrey
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