JPH0432062U - - Google Patents
Info
- Publication number
- JPH0432062U JPH0432062U JP7449290U JP7449290U JPH0432062U JP H0432062 U JPH0432062 U JP H0432062U JP 7449290 U JP7449290 U JP 7449290U JP 7449290 U JP7449290 U JP 7449290U JP H0432062 U JPH0432062 U JP H0432062U
- Authority
- JP
- Japan
- Prior art keywords
- light
- emitting element
- receiving element
- detected
- space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000000428 dust Substances 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Optical Measuring Cells (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
第１図Ａはこの考案の一実施例である光学式粉
塵センサの概略平面図、Ｂは正面図、Ｃは側面図
、第２図ＡないしＣはその発光素子から出た光の
反射状態を示し、Ａはθが４５度以上のとき、Ｂ
は４５度のとき、Ｃは４５度以下のとき、第３図
はその作動説明図、第４図はその外観斜視図、第
５図Ａはその光学式粉塵センサを備える空気清浄
機の概略構成を示す正面図、Ｂはその側面図、第
６図は初期および経時における室内の汚れ度とセ
ンサ出力すなわち空気清浄機の風量との関係を示
すグラフ、第７図および第８図はそれぞれ光学式
粉塵センサにおける従来の問題点を説明するため
の説明図である。
１３……光学式粉塵センサ、２０ｃ，２０ｄ，
２０ｅ……壁面、２２……発光素子、２２ａ……
光軸、２３ａ……光軸、２４……被検知空間、Ｔ
……光軸面。
Figure 1A is a schematic plan view of an optical dust sensor that is an embodiment of this invention, B is a front view, C is a side view, and Figures 2A to C show the state of reflection of light emitted from the light emitting element. and A is B when θ is 45 degrees or more.
When C is 45 degrees, when C is 45 degrees or less, Fig. 3 is an explanatory diagram of its operation, Fig. 4 is its external perspective view, and Fig. 5A is a schematic configuration of the air purifier equipped with the optical dust sensor. B is a front view, B is a side view, FIG. 6 is a graph showing the relationship between the degree of indoor contamination and the sensor output, that is, the air volume of the air purifier, both initially and over time. FIGS. 7 and 8 are optical It is an explanatory view for explaining a conventional problem in a dust sensor. 13...Optical dust sensor, 20c, 20d,
20e...Wall surface, 22...Light emitting element, 22a...
Optical axis, 23a...Optical axis, 24...Detected space, T
...Optical axis plane.
Claims (1)
被検知空間に向けて発光素子と受光素子とを配置
し、その発光素子から出た光を前記被検知空間内
の煙や埃などの粉塵で反射して前記受光素子に入
れ、その受光素子で受光した反射光をその反射光
量に応じた電気信号に変換して出力し、周囲の空
気の汚れ具合を測定する光学式粉塵センサにおい
て、前記被検知空間を区画する壁面のうち前記発
光素子および前記受光素子と対向する壁面を、そ
れら発光素子および受光素子の双方の光軸を含む
光軸面に対して傾斜させてなる、光学式粉塵セン
サ。 ２ 設置時、前記発光素子および前記受光素子と
対向する壁面を下向きに設けてなる、前記請求項
１に記載の光学式粉塵センサ。[Claims for Utility Model Registration] 1. A space to be detected through which air flows in and out is provided, a light emitting element and a light receiving element are arranged facing the space to be detected, and light emitted from the light emitting element is directed into the space to be detected. The reflected light received by the light receiving element is converted into an electrical signal according to the amount of reflected light and output, and the degree of pollution of the surrounding air is measured. In the optical dust sensor, a wall surface that faces the light-emitting element and the light-receiving element among the wall surfaces that partition the detected space is inclined with respect to an optical axis plane that includes the optical axes of both the light-emitting element and the light-receiving element. Optical dust sensor. 2. The optical dust sensor according to claim 1, wherein a wall surface facing the light emitting element and the light receiving element faces downward when installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7449290U JP2505282Y2 (en) | 1990-07-13 | 1990-07-13 | Optical dust sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7449290U JP2505282Y2 (en) | 1990-07-13 | 1990-07-13 | Optical dust sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0432062U true JPH0432062U (en) | 1992-03-16 |
| JP2505282Y2 JP2505282Y2 (en) | 1996-07-24 |
Family
ID=31614229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7449290U Expired - Fee Related JP2505282Y2 (en) | 1990-07-13 | 1990-07-13 | Optical dust sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2505282Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102490311B1 (en) * | 2018-04-25 | 2023-01-20 | 주식회사 히타치엘지 데이터 스토리지 코리아 | Dust sensor |
-
1990
- 1990-07-13 JP JP7449290U patent/JP2505282Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2505282Y2 (en) | 1996-07-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |