JP2020071140A5 - - Google Patents
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- JP2020071140A5 JP2020071140A5 JP2018205656A JP2018205656A JP2020071140A5 JP 2020071140 A5 JP2020071140 A5 JP 2020071140A5 JP 2018205656 A JP2018205656 A JP 2018205656A JP 2018205656 A JP2018205656 A JP 2018205656A JP 2020071140 A5 JP2020071140 A5 JP 2020071140A5
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- 230000001629 suppression Effects 0.000 claims description 5
- 230000003287 optical Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 1
Description
上記目的を達成するため、請求項１に記載の発明は、空気に含まれる粒子状物質を検出するＰＭセンサであって、粒子状物質を検出するための光学素子（２２１〜２２３）と、光学素子を収納するとともに空気が流れる第１空気流路（２３１）を形成する内側ケース（２１３、２１４）と、内側ケースとの間に空気が第１空気流路を迂回して流れる第２空気流路（２３２）を形成する外側ケース（２１１、２１２）と、を備えている。外側ケースには、空気を第２空気流路に流入させる外側流入口（２１１ａ）と第２空気流路の空気を外側ケースの外に流出させる外側流出口（２１１ｂ）が形成され、内側ケースには、第１空気流路から空気を流出させる内側流出口（２１４ｂ）が形成され、外側流入口から外側ケースの内部に流入した空気の一部が第１空気流路に流入するとともに外側ケースの内部に流入した空気の残りが第２空気流路に流入した後、第１空気流路の内側流出口から流出した空気と第２空気流路を流れる空気が合流して外側流出口から外側ケースの外に排出されるようになっている。そして、内側流出口の中心線が外側流出口の中心線と偏心していることにより、内側流出口から流出した空気と第２空気流路を流れる空気の合流部に生じる圧力低下領域の圧力低下が抑制される構造を有し、外側ケースは、該外側ケースの外側流出口が形成された面の法線方向から外側ケースに投影したとき外側流出口の一部が内側流出口の内部に含まれるように形成されている。 In order to achieve the above object, the invention according to claim 1 is a PM sensor for detecting particulate matter contained in air, which comprises an optical element (221 to 223) for detecting particulate matter and optics. A second air flow in which air bypasses the first air flow path between the inner cases (213, 214) forming the first air flow path (231) for accommodating the element and allowing air to flow. It includes outer cases (211 and 212) that form a road (232). The outer case is formed with an outer inflow port (211a) for allowing air to flow into the second air flow path and an outer outlet (211b) for allowing air in the second air flow path to flow out of the outer case. Is formed with an inner outlet (214b) that allows air to flow out from the first air flow path, and a part of the air that has flowed into the inside of the outer case from the outer inflow port flows into the first air flow path and the outer case. After the rest of the air that has flowed into the inside flows into the second air flow path, the air that has flowed out from the inner outlet of the first air flow path and the air that flows through the second air flow path merge to form an outer case from the outer outlet. It is designed to be discharged to the outside of. Since the center line of the inner outlet is eccentric to the center line of the outer outlet , the pressure drop in the pressure drop region generated at the confluence of the air flowing out from the inner outlet and the air flowing through the second air flow path is reduced. The outer case has a structure to be suppressed, and a part of the outer outlet is included inside the inner outlet when projected onto the outer case from the normal direction of the surface on which the outer outlet of the outer case is formed. It is formed like this.
上記した構成によれば、本ＰＭセンサは、内側流出口から流出した空気と第２空気流路を流れる空気の合流部に生じる圧力低下領域の圧力低下が抑制される構造を有している。したがって、第１空気流路を流れる空気の速度が抑制され、空気中の粒子の検出精度を向上することができる。また、内側流出口の中心線が外側流出口の中心線と偏心していることにより、内側流出口から流出した空気と第２空気流路を流れる空気の合流部に生じる圧力低下領域の圧力低下を抑制することができる。また、外側ケースは、該外側ケースの外側流出口が形成された面の法線方向から外側ケースに投影したとき外側流出口の一部が内側流出口の内部に含まれるように形成されているので、第１空気流路に空気を導入する内側流入口における圧力損失が大きくなりすぎず、第１空気流路に空気が導入されやすくすることができる。 According to the above configuration, the PM sensor has a structure in which the pressure drop in the pressure drop region generated at the confluence of the air flowing out from the inner outlet and the air flowing through the second air flow path is suppressed. Therefore, the velocity of the air flowing through the first air flow path is suppressed, and the detection accuracy of particles in the air can be improved. Further, since the center line of the inner outlet is eccentric with the center line of the outer outlet, the pressure drop in the pressure drop region generated at the confluence of the air flowing out from the inner outlet and the air flowing through the second air flow path can be reduced. It can be suppressed. Further, the outer case is formed so that a part of the outer outlet is included inside the inner outlet when projected onto the outer case from the normal direction of the surface on which the outer outlet of the outer case is formed. Therefore, the pressure loss at the inner inflow port for introducing air into the first air flow path does not become too large, and the air can be easily introduced into the first air flow path.
Claims (3)
前記粒子状物質を検出するための光学素子（２２１〜２２３）と、
前記光学素子を収納するとともに前記空気が流れる第１空気流路（２３１）を形成する内側ケース（２１３、２１４）と、
前記内側ケースとの間に前記空気が前記第１空気流路を迂回して流れる第２空気流路（２３２）を形成する外側ケース（２１１、２１２）と、を備え、
前記外側ケースには、前記空気を前記第２空気流路に流入させる外側流入口（２１１ａ）と前記第２空気流路の前記空気を前記外側ケースの外に流出させる外側流出口（２１１ｂ）が形成され、
前記内側ケースには、前記第１空気流路から前記空気を流出させる内側流出口（２１４ｂ）が形成され、
前記外側流入口から前記外側ケースの内部に流入した前記空気の一部が前記第１空気流路に流入するとともに前記外側ケースの内部に流入した前記空気の残りが前記第２空気流路に流入した後、前記第１空気流路の前記内側流出口から流出した前記空気と前記第２空気流路を流れる前記空気が合流して前記外側流出口から前記外側ケースの外に排出されるようになっており、
前記内側流出口の中心線が前記外側流出口の中心線と偏心していることにより、前記内側流出口から流出した前記空気と前記第２空気流路を流れる前記空気の合流部に生じる圧力低下領域の圧力低下が抑制される構造を有し、
前記外側ケースは、該外側ケースの前記外側流出口が形成された面の法線方向から前記外側ケースに投影したとき前記外側流出口の一部が前記内側流出口の内部に含まれるように形成されているＰＭセンサ。 A PM sensor that detects particulate matter contained in air.
Optical elements (221 to 223) for detecting the particulate matter, and
An inner case (213, 214) that houses the optical element and forms a first air flow path (231) through which the air flows.
An outer case (211 and 212) is provided which forms a second air flow path (232) in which the air bypasses the first air flow path and flows between the inner case and the inner case.
The outer case has an outer inflow port (211a) that allows the air to flow into the second air flow path and an outer outlet (211b) that allows the air in the second air flow path to flow out of the outer case. Formed,
The inner case is formed with an inner outlet (214b) that allows the air to flow out from the first air flow path.
A part of the air that has flowed into the inside of the outer case from the outer inflow port flows into the first air flow path, and the rest of the air that has flowed into the inside of the outer case flows into the second air flow path. After that, the air flowing out from the inner outlet of the first air flow path and the air flowing through the second air flow path merge and are discharged from the outer outlet to the outside of the outer case. It has become
A pressure drop region generated at the confluence of the air flowing out from the inner outlet and the air flowing through the second air flow path because the center line of the inner outlet is eccentric with the center line of the outer outlet. have a structure pressure drop can be suppressed,
The outer case is formed so that a part of the outer outlet is included inside the inner outlet when projected onto the outer case from the normal direction of the surface on which the outer outlet of the outer case is formed. PM sensor that is.
前記外側ケースには、前記第１外側流出口と異なる位置に、前記第２空気流路の前記空気を前記外側ケースの外に流出させる第２外側流出口が形成されている請求項１に記載のＰＭセンサ。 The outer outlet is the first outer outlet, and is
Wherein the outer case, according to a position different from the first outer outlet, to claim 1 where the second outer outlet for outflow of the air in the second air passage to the outside of the outer casing is formed PM sensor.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018205656A JP7206814B2 (en) | 2018-10-31 | 2018-10-31 | PM sensor |
| PCT/JP2019/040929 WO2020090503A1 (en) | 2018-10-31 | 2019-10-17 | Pm sensor |
| DE112019005395.7T DE112019005395T5 (en) | 2018-10-31 | 2019-10-17 | PM sensor |
| CN201980071508.1A CN112930472A (en) | 2018-10-31 | 2019-10-17 | PM sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018205656A JP7206814B2 (en) | 2018-10-31 | 2018-10-31 | PM sensor |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2020071140A JP2020071140A (en) | 2020-05-07 |
| JP2020071140A5 true JP2020071140A5 (en) | 2020-10-15 |
| JP7206814B2 JP7206814B2 (en) | 2023-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2018205656A Active JP7206814B2 (en) | 2018-10-31 | 2018-10-31 | PM sensor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7206814B2 (en) |
| CN (1) | CN112930472A (en) |
| DE (1) | DE112019005395T5 (en) |
| WO (1) | WO2020090503A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023122176A (en) | 2022-02-22 | 2023-09-01 | 株式会社ヴァレオジャパン | Air conditioner for vehicle |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6134443A (en) * | 1984-07-25 | 1986-02-18 | Matsushita Electric Works Ltd | Sensor |
| JPH09138196A (en) * | 1995-11-15 | 1997-05-27 | Denso Corp | Concentration detector for particle in liquid |
| JP2000043549A (en) * | 1998-07-28 | 2000-02-15 | Calsonic Corp | Gas detecting device for vehicle |
| JP2002130195A (en) * | 2000-10-30 | 2002-05-09 | Denso Corp | Muffler |
| JP2008024032A (en) * | 2006-07-18 | 2008-02-07 | Denso Corp | Air conditioner for vehicle |
| JP4905040B2 (en) * | 2006-10-06 | 2012-03-28 | 株式会社島津製作所 | Particle classifier |
| JP5511238B2 (en) * | 2009-06-29 | 2014-06-04 | 三菱重工業株式会社 | Aspirator and vehicle air conditioner using the same |
| JP5510017B2 (en) * | 2010-04-15 | 2014-06-04 | いすゞ自動車株式会社 | Exhaust sensor arrangement structure |
| JP5640592B2 (en) * | 2010-09-14 | 2014-12-17 | セイコーエプソン株式会社 | Optical device unit and detection apparatus |
| JP5667102B2 (en) * | 2012-02-21 | 2015-02-12 | 日本特殊陶業株式会社 | Particle sensor |
| JP5851534B2 (en) * | 2013-07-17 | 2016-02-03 | シャープ株式会社 | Fine particle measuring device |
| JP5837107B2 (en) * | 2014-01-17 | 2015-12-24 | シャープ株式会社 | Particle measuring instrument |
| KR101559765B1 (en) * | 2014-07-16 | 2015-10-14 | (주)일산 | Particles Collecting Apparatus Using Bipolar Discharge for Increasing Filtration Efficiency, and Particles Collecting System Having the Same |
| US20170038343A1 (en) * | 2015-08-07 | 2017-02-09 | Abhijeet Vikram Kshirsagar | Box-in-box gas sensor housing |
| WO2017043263A1 (en) * | 2015-09-09 | 2017-03-16 | 株式会社村田製作所 | Gas concentration detection device |
| JP2017072428A (en) * | 2015-10-06 | 2017-04-13 | パナソニックＩｐマネジメント株式会社 | Photoelectric particle detection sensor |
| KR20170097391A (en) * | 2016-02-18 | 2017-08-28 | 암페놀센싱코리아 유한회사 | Sensor device for sensing fine dust |
| JP6127280B1 (en) * | 2016-03-29 | 2017-05-17 | パナソニックＩｐマネジメント株式会社 | Particle detection sensor |
| JP2018205656A (en) | 2017-06-09 | 2018-12-27 | セイコーエプソン株式会社 | projector |
-
2018
- 2018-10-31 JP JP2018205656A patent/JP7206814B2/en active Active
-
2019
- 2019-10-17 DE DE112019005395.7T patent/DE112019005395T5/en active Pending
- 2019-10-17 CN CN201980071508.1A patent/CN112930472A/en active Pending
- 2019-10-17 WO PCT/JP2019/040929 patent/WO2020090503A1/en active Application Filing
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