JPS6126920Y2 - - Google Patents
Info
- Publication number
- JPS6126920Y2 JPS6126920Y2 JP15908080U JP15908080U JPS6126920Y2 JP S6126920 Y2 JPS6126920 Y2 JP S6126920Y2 JP 15908080 U JP15908080 U JP 15908080U JP 15908080 U JP15908080 U JP 15908080U JP S6126920 Y2 JPS6126920 Y2 JP S6126920Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light emitting
- lens
- protection device
- smoke detector
- 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.)
- Expired
Links
- 239000000779 smoke Substances 0.000 claims description 11
- 240000002853 Nelumbo nucifera Species 0.000 claims description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 239000011358 absorbing material Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Description
【考案の詳細な説明】
この考案は透過光式煙感知器の投受光部のレン
ズを塵埃や湿気から守る保護装置に関する。[Detailed Description of the Invention] This invention relates to a protection device for protecting the lens of the light emitting/receiving part of a transmitted light type smoke detector from dust and moisture.
透過光式煙感知器は、発光ダイオードなどの光
源とそれより放射される光を平行光線とするレン
ズとを備えた投光部と、この投光部に所定間隔を
おいて対面配置され上記光線を受光する収斂用の
レンズと太陽電池などの受光素子とを備えた受光
部とで構成され、投・受光部間に煙が進入するこ
とにより生ずる投光部から受光部へ照射される光
の減衰を検出して火災を報知するようにしてい
た。 A transmitted-light smoke detector includes a light projecting section that includes a light source such as a light emitting diode and a lens that converts the light emitted from the light source into parallel light beams, and a light projecting section that is placed facing the light projecting section at a predetermined distance and that emits the light beams. It consists of a convergence lens that receives light and a light receiving section equipped with a light receiving element such as a solar cell, and the light emitted from the light emitting section to the light receiving section is generated when smoke enters between the projecting and receiving sections. It was designed to detect the attenuation and warn of a fire.
しかし上記感知器は、天井面などに取り付けら
れかつ常時暖冷房などにより生ずる空気の流れに
さらされるので、この気流によつて運ばれる塵埃
や湿気により投受光部のレンズ面が汚損されたり
結露し、火災でもないのに受光素子に照射される
光が減衰し誤警報を発する欠点があつた。 However, since the above-mentioned sensor is mounted on a ceiling or the like and is constantly exposed to the air flow generated by heating and cooling, the lens surface of the light emitting and receiving part may become dirty or condensate due to dust and moisture carried by this air flow. However, there was a drawback that the light irradiated to the light receiving element was attenuated and a false alarm was issued even though there was no fire.
この考案は上記の点にかんがみ投受光部のレン
ズを塵埃や湿気から守ることのできる透過光式煙
感知器の投受光部の保護装置を提供するものであ
る。 SUMMARY OF THE PRESENT DISCLOSURE In view of the above, the present invention provides a protection device for the light emitting and receiving parts of a light transmitted smoke detector, which is capable of protecting the lenses of the light emitting and receiving parts from dust and moisture.
以下この考案の一実施例を第１図ないし第３図
により説明する。 An embodiment of this invention will be described below with reference to FIGS. 1 to 3.
第１図において、１および２は間隔をおいて対
面配置された筒状体よりなる投光部と受光部で、
投光部１には発光ダイオードなどの光源３とこの
光源３より放射される光を平行光線Ｌとするレン
ズ４が、また受光部２には上記光線Ｌを収斂させ
るレンズ５とその焦点に太陽電池などの受光素子
６が設けられる。また上記投受光部のレンズ４，
５の対面する側には、第２図および第３図に示す
ような多数の長孔７とレンズ４，５との密着面８
を備えた、多孔質の材質（例えばアクリロニトリ
ル系特殊樹脂多孔体）でなる蓮根状の柱体の保護
装置９，９が設けられる。さらに図示されていな
いが、光源３には点灯回路が、受光素子６には所
定の出力変化を検出し警報を発する検出回路など
が設けられる。 In FIG. 1, 1 and 2 are a light projecting part and a light receiving part, which are made of cylindrical bodies and are arranged facing each other with an interval between them.
The light projector 1 includes a light source 3 such as a light emitting diode, and a lens 4 that converts the light emitted from the light source 3 into parallel rays L. The light receiver 2 includes a lens 5 that converges the rays L, and a lens 5 that converges the light rays L, and a lens 5 that focuses the light rays L. A light receiving element 6 such as a battery is provided. In addition, the lens 4 of the light emitting/receiving section,
5 has a contact surface 8 between a large number of elongated holes 7 and the lenses 4 and 5 as shown in FIGS. 2 and 3.
Lotus root-shaped columnar protection devices 9 made of a porous material (for example, a porous acrylonitrile-based special resin) are provided. Furthermore, although not shown, the light source 3 is provided with a lighting circuit, and the light receiving element 6 is provided with a detection circuit that detects a predetermined output change and issues an alarm.
次にこの感知器の動作を説明する。平常時に
は、投光部１の光源３より放射される光は、レン
ズ４および保護装置９の長孔７を通じて測定空間
に平行光線Ｌとして放射され、さらに受光部２の
保護装置９の長孔７およびレンズ５を通じて受光
素子６を強く照射する。このような状態におい
て、火災が発生し測定空間の平行光線Ｌ中に煙が
進入すると、光は煙粒子により吸収あるいは散乱
され受光部２の保護装置９の長孔７およびレンズ
〓〓〓〓〓
５を通じて受光素子６に照射される光が減少し、
この変化が検出回路で検出され火災信号が発せら
れる。 Next, the operation of this sensor will be explained. Under normal conditions, the light emitted from the light source 3 of the light projecting section 1 is emitted into the measurement space as a parallel light beam L through the lens 4 and the long hole 7 of the protection device 9, and is further emitted through the long hole 7 of the protection device 9 of the light receiving section 2. The light receiving element 6 is strongly irradiated through the lens 5. In such a state, if a fire breaks out and smoke enters the parallel light beam L in the measurement space, the light will be absorbed or scattered by the smoke particles and will cause damage to the elongated hole 7 of the protection device 9 of the light receiving section 2 and the lens.
The light irradiated to the light receiving element 6 through 5 decreases,
This change is detected by the detection circuit and a fire signal is issued.
また暖冷房装置などにより生ずる空気の流れに
乗つて投光部１または受光部２に進入しようとす
る浮遊塵埃は、保護装置９の長孔７の側壁面で静
止され、たい積され水分が吸水されるので、レン
ズ４および５が直接汚損されたり曇つたり結露さ
れにくくなる。また受光部２に設けられた保護装
置９の長孔７は、投光部１より放射される平行光
線Ｌの軸と平行して設けられるので、煙により生
ずる散乱光はこの孔７を通じて受光素子６を照射
することが少なくなるので、良好な感知器が得ら
れる効果もある。 In addition, floating dust that tries to enter the light emitting part 1 or the light receiving part 2 by riding on the air flow generated by heating and cooling equipment etc. is stopped on the side wall surface of the elongated hole 7 of the protection device 9, accumulates, and absorbs moisture. Therefore, the lenses 4 and 5 are less likely to be directly soiled, fogged, or exposed to dew condensation. Furthermore, since the elongated hole 7 of the protection device 9 provided in the light receiving section 2 is provided parallel to the axis of the parallel light beam L emitted from the light projecting section 1, the scattered light generated by smoke passes through this hole 7 to the light receiving element. Since the amount of irradiation of 6 is reduced, there is also the effect that a good sensor can be obtained.
第１図はこの考案の保護装置を備えた透過光式
煙感知器の概略断面図、第２図は保護装置の正面
図、第３図は第２図の断面図である。
１……投光部、２……受光部、４，５……レン
ズ、７……長孔、９……保護装置。
〓〓〓〓〓
FIG. 1 is a schematic sectional view of a transmitted light type smoke detector equipped with a protection device of this invention, FIG. 2 is a front view of the protection device, and FIG. 3 is a sectional view of FIG. 2. 1... Light projecting section, 2... Light receiving section, 4, 5... Lens, 7... Elongated hole, 9... Protective device. 〓〓〓〓〓
Claims (1)
置される透過光式煙感知器の上記投・受光部の
レンズの前面に密着して設けられる保護装置で
あつて、多数の長孔を備えた蓮根状の柱体で構
成されたことを特徴とする透過光式煙感知器の
投受光部の保護装置。 ２ 柱体が吸水性の材質よりなる実用新案登録請
求の範囲第１項記載の透過光式煙感知器の投受
光部の保護装置。[Scope of Claim for Utility Model Registration] 1. A protective device that is provided in close contact with the front surface of the lens of the light emitting and light receiving parts of a transmitted light type smoke detector in which the light emitting part and the light receiving part are arranged facing each other at a certain interval. 1. A protection device for a light emitting/receiving part of a transmitted light type smoke detector, characterized in that the device is constituted by a lotus root-shaped column having a large number of long holes. 2. A protection device for a light emitting/receiving part of a transmitted light type smoke detector as set forth in claim 1 of the claimed utility model registration, in which the column body is made of a water-absorbing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15908080U JPS6126920Y2 (en) | 1980-11-08 | 1980-11-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15908080U JPS6126920Y2 (en) | 1980-11-08 | 1980-11-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5781547U JPS5781547U (en) | 1982-05-20 |
| JPS6126920Y2 true JPS6126920Y2 (en) | 1986-08-12 |
Family
ID=29518111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15908080U Expired JPS6126920Y2 (en) | 1980-11-08 | 1980-11-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6126920Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2540192Y2 (en) * | 1991-03-12 | 1997-07-02 | ホーチキ株式会社 | Ray type detector |
| JP6525236B2 (en) * | 2014-09-01 | 2019-06-05 | 能美防災株式会社 | Dimming smoke detector |
-
1980
- 1980-11-08 JP JP15908080U patent/JPS6126920Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5781547U (en) | 1982-05-20 |
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