PM SENSOR

WIPO Patent Application WO/2020/090503

A1

This PM sensor comprises: an optical element (221-223) for detecting particulate matter; an inner case (213, 214) that accommodates the optical element and forms a first air flow path (231); and an outer case (211, 212) that forms, between the outer case and inner case, a second air flow path (232) through which air flows so as to bypass the first air flow path. The outer case has, formed therein, an outside inflow opening (211a) for allowing air to flow into the second air flow path and an outside outflow opening (211b) for allowing the air of the second air flow path to flow outside of the outer case. The inner case has, formed therein, an inside outflow opening (214b) for allowing air to flow out from the first air flow path. After some air that has flowed in from the outside inflow opening flows into the first air flow path and the rest flows into the second air flow path, air that has flowed out from the inside outflow opening and air flowing through the second air flow path merge and are discharged to the outside from the outside outflow opening. Pressure reduction in the pressure reduction area formed at the section where air that has flowed out from the inside outflow opening and air flowing through the second air flow path merge is suppressed.

ISHIGURO SHUNSUKE (JP)
KUMADA TATSUMI (JP)
ISHIYAMA NAOTAKA (JP)
KAWAI TAKAYOSHI (JP)

PCT/JP2019/040929

May 07, 2020

October 17, 2019

Click for automatic bibliography generation  

DENSO CORP (JP)

G01N15/06; B60H1/24; G01N21/47

WO2011129294A1

2011-10-20

JP2017181153A	2017-10-05
JPS6134443A	1986-02-18
JP2008024032A	2008-02-07
JP2015038463A	2015-02-26
US20170038343A1	2017-02-09

YOU-I PATENT FIRM (JP)

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