CN113808365A - Light-reducing point type photoelectric smoke-sensing detector labyrinth and detector - Google Patents
Light-reducing point type photoelectric smoke-sensing detector labyrinth and detector Download PDFInfo
- Publication number
- CN113808365A CN113808365A CN202110252765.4A CN202110252765A CN113808365A CN 113808365 A CN113808365 A CN 113808365A CN 202110252765 A CN202110252765 A CN 202110252765A CN 113808365 A CN113808365 A CN 113808365A
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- China
- Prior art keywords
- light
- labyrinth
- detector
- type photoelectric
- photoelectric smoke
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
- G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
Abstract
The invention discloses a light-reduction type point-type photoelectric smoke detector maze and a detector, which comprise a circular maze body, an emitting device and a receiving device, wherein the emitting device and the receiving device are electrically connected with a circuit board, a smoke cavity is arranged in the maze body, the smoke cavity is provided with a light-reduction channel and a plurality of reflecting devices, and after smoke enters the smoke cavity, light rays emitted by the emitting device pass through the light-reduction channel and are continuously reflected for multiple times by the reflecting devices and then reach the receiving device. The invention discloses a detector which comprises a labyrinth and a labyrinth cover which are connected with each other, wherein the labyrinth cover is buckled on the labyrinth through a buckle. The light-reduction point type photoelectric smoke detector labyrinth uses the light-reduction principle of a reflecting device to enhance the effective light path for smoke detection and weaken ineffective light. The length of light rays detected in a small space is prolonged by bending and reflecting the light rays for multiple times, and the intensity of effective optical signals is improved.
Description
Technical Field
The invention relates to the field of fire detection of fire fighting equipment, in particular to a point type photoelectric smoke detector.
Background
The point type photoelectric smoke-sensing fire detector is a fire detector which has the largest output and the most extensive use in the field of automatic fire detection and alarm at present, and is developed by utilizing the basic property that the smoke generated during fire can change the light transmission characteristic. The arrangement of the infrared light-emitting element (emitting device) and the photosensitive element (receiving device) of the point-type photoelectric smoke detector in the detection chamber is usually an offset design. The distance between the two is typically 20-25 mm. In a normal smokeless monitoring state, the sensor element does not receive any light, including light emitted by the infrared light emitting element.
The working principle of the existing point type photoelectric smoke fire detector is a light scattering type, and under the normal condition, the receiving device cannot receive the light emitted by the emitting device, so that the light current is not generated. When smoke enters the detection chamber in case of fire, the light emitted by the light emitting device is diffused due to the action of smoke particles, and the diffused light is received by the receiving device, so that the impedance of the receiving device is changed to generate light current, thereby realizing the function of converting smoke signals into electric signals, and the detector receives the signals and then judges whether an alarm signal needs to be sent.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a light-reducing point-type photoelectric smoke-sensitive detector labyrinth and detector are provided, by the operation of smoke light-reducing principle, the light emitted by the emitting device of infrared light-emitting element is reflected by smoke particles to the receiving device of photosensitive element.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a subtract light formula point type photoelectric smoke detector maze, includes the hollow maze body of ring shape, ruddiness emitter and receiving arrangement, emitter and receiving arrangement and circuit board electric connection, this internal smog chamber that is equipped with in maze, the smog chamber is provided with dimming passageway and a plurality of reflect meter, gets into when smog back in the smog chamber, during the light route dimming passageway of emitter transmission, reachs behind reflect meter's a lot of continuous reflection receiving arrangement.
Furthermore, the reflecting device is a reflector, and the reflector is fixed on the labyrinth body through a reflector base.
Further, a plurality of the reflector bases are arranged along the edge of the inner wall of the labyrinth body.
Furthermore, the dimming channel is an S-shaped channel which is formed by arranging a plurality of light blocking walls at intervals and has a plurality of bends.
Furthermore, the light blocking walls are convex triangular cones, and the tops of the adjacent two light blocking walls are oppositely arranged and staggered by a certain gap.
Further, the reflecting device is located between the cone bottoms of two adjacent light blocking walls.
The invention also discloses a detector which comprises a labyrinth and a labyrinth cover which are mutually connected, wherein the labyrinth is the light-reduction point type photoelectric smoke detector labyrinth, and the labyrinth cover is buckled on the labyrinth through a buckle.
The invention has the technical effects that: the light-reduction point type photoelectric smoke detector labyrinth uses the light-reduction principle of a reflecting device to enhance the effective light path for smoke detection and weaken ineffective light. The length of light rays detected in a small space is prolonged by bending and reflecting the light rays for multiple times, and the intensity of effective optical signals is improved. The invention works by the light-reducing principle, when the light emitted by the emitting device of the infrared light-emitting element is reflected to the receiving device of the photosensitive element by smoke particles, and when a sufficient light signal is received, the detector sends out a fire alarm.
The S shape of the dimming channel prolongs the length of the channel, but can reduce the volume, thereby realizing the point type structure design of the photoelectric smoke-sensitive fire detector, directly measuring the m value of smoke in a point type structure space, wherein the minimum value is more than 0.3, and if the matching optimization between a labyrinth and a shell is good, the m value can reach the sensitivity of 1.0 at most.
Drawings
FIG. 1 is a top view of a light-attenuating point-type photoelectric smoke detector labyrinth of the present invention;
FIG. 2 is a schematic structural diagram of a light-reducing point-type photoelectric smoke detector labyrinth of the present invention.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
As shown in fig. 1 and 2, a light-reducing type point-type photoelectric smoke detector labyrinth 1 according to the present invention includes a ring-shaped hollow labyrinth body 19, an emitting device 11 and a receiving device 20, wherein the emitting device 11 and the receiving device 20 are electrically connected to a circuit board (not shown in the figure), a smoke cavity 18 is disposed in the labyrinth body 19, the smoke cavity 18 is provided with a light-reducing channel 14 and a plurality of reflecting devices, when smoke enters the smoke cavity, light emitted by the emitting device passes through the light-reducing channel 14, and light attenuated by the reflecting devices after multiple corresponding continuous reflections reaches the receiving device 20.
The reflecting device is a reflecting mirror 12, and the reflecting mirror 12 is fixed on the labyrinth body 19 through a reflecting mirror base 15. The plurality of the emission mirror bases are arranged along the edge of the inner wall of the labyrinth body.
The light reduction channel 14 is a bent S-shaped channel, a plurality of convex light blocking walls 13 in a conical shape are arranged on two sides of the S-shaped channel, in this embodiment, the light blocking walls 13 are hollow and convex triangular cones, a certain gap 133 is staggered between two adjacent light blocking walls 13, the cone tops 131 are arranged oppositely, and the light reduction channel 14 just passes through the gap 133. The reflectors 12 are located at the conical bottoms 132 of two adjacent light-blocking walls 13, and the position of the reflectors 12 is selected according to the light-reflecting principle that every two reflectors are arranged at a certain angle. As shown in fig. 2, the plurality of reflectors 12 are disposed on two sides of the central axis of the labyrinth body 19 and are disposed opposite to each other, wherein each reflector 12 is disposed corresponding to two reflectors 12 facing each other for continuous reflection of light.
In this embodiment, the S shape of the dimming channel 14 extends the length of the channel, so as to realize the point-type structural design of the photoelectric smoke-sensitive fire detector, and the minimum value of the point-type structural design can be greater than 0.3 by directly measuring the m value of smoke in the point-type structural space, and if the labyrinth and the housing are well matched and optimized, the sensitivity of 1.0 can be achieved at the highest m value.
The working principle of the invention is based on the measuring instruments used in the national standards for fire smoke detection and in the us and european standards, i.e. smoke detection densitometers. The labyrinth of the invention simulates the principle of the detecting instrument to realize the detection of the smoke. The invention principle of the invention is different from the prior art, the working principle of the photoelectric smoke fire detector in the prior art is of a light scattering type, the invention is designed by adopting a light reduction principle and is carried out by adopting the principle of multiple continuous reflection of a reflecting device. In addition, the point-type detector is designed by arranging the bent S-shaped dimming channel, the length of light rays detected in a small space is realized by prolonging the dimming channel, and the intensity of effective optical signals is improved.
The invention also discloses a detector, which comprises a labyrinth and a labyrinth cover which are mutually connected, wherein the labyrinth is like a light-reduction point type photoelectric smoke detector labyrinth, and the labyrinth cover is buckled on the labyrinth through a buckle.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (7)
1. The utility model provides a subtract hollow maze body of light formula point type photoelectric smoke detector maze, includes annular hollow maze body, emitter and receiving arrangement, ruddiness emitter and receiving arrangement and circuit board electric connection, this internal smog chamber that is equipped with in maze, its characterized in that, the smog chamber is provided with dimming passageway and a plurality of reflect meter, and when smog gets into back in the smog chamber, reachs behind reflect meter's a lot of continuous reflection during the light route dimming passageway of emitter transmission receiving arrangement.
2. The light-reduction type point-type photoelectric smoke detector labyrinth as claimed in claim 1, wherein the reflecting device is a reflecting mirror, and the reflecting mirror is fixed on the labyrinth body through a reflecting mirror base.
3. The light-attenuating point-type photodetector labyrinth according to claim 2, wherein a plurality of the reflector bases are provided along an inner wall edge of the labyrinth body.
4. The light-reducing point-type photoelectric smoke detector labyrinth according to claim 1, wherein the light-reducing channel is an S-shaped channel with a plurality of bends and formed by a plurality of light-blocking walls arranged at intervals.
5. The light-reduction type point-type photoelectric smoke detector labyrinth according to claim 4, wherein the light-blocking walls are convex triangular cones, and the tops of the cones of two adjacent light-blocking walls are opposite and staggered by a certain gap.
6. The light-reducing point-type photoelectric smoke detector labyrinth according to claim 4, wherein said reflecting means is located between the cone bottoms of two adjacent light-blocking walls.
7. A detector, comprising a labyrinth and a labyrinth cover which are connected with each other, wherein the labyrinth is the dimming point type photoelectric smoke detector labyrinth as claimed in any one of claims 1 to 6, and the labyrinth cover is buckled on the labyrinth through a buckle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110252765.4A CN113808365A (en) | 2021-03-10 | 2021-03-10 | Light-reducing point type photoelectric smoke-sensing detector labyrinth and detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110252765.4A CN113808365A (en) | 2021-03-10 | 2021-03-10 | Light-reducing point type photoelectric smoke-sensing detector labyrinth and detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113808365A true CN113808365A (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110252765.4A Pending CN113808365A (en) | 2021-03-10 | 2021-03-10 | Light-reducing point type photoelectric smoke-sensing detector labyrinth and detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114913666A (en) * | 2022-05-11 | 2022-08-16 | 青岛鼎信通讯消防安全有限公司 | Labyrinth smoke detector capable of being detached independently and preventing false alarm and detection method |
| CN117523772A (en) * | 2024-01-04 | 2024-02-06 | 西安德安注册安全工程师事务所有限公司 | Fire monitoring alarm fire extinguishing device for petroleum engineering vehicle |
-
2021
- 2021-03-10 CN CN202110252765.4A patent/CN113808365A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114913666A (en) * | 2022-05-11 | 2022-08-16 | 青岛鼎信通讯消防安全有限公司 | Labyrinth smoke detector capable of being detached independently and preventing false alarm and detection method |
| CN117523772A (en) * | 2024-01-04 | 2024-02-06 | 西安德安注册安全工程师事务所有限公司 | Fire monitoring alarm fire extinguishing device for petroleum engineering vehicle |
| CN117523772B (en) * | 2024-01-04 | 2024-03-29 | 西安德安注册安全工程师事务所有限公司 | Fire monitoring alarm fire extinguishing device for petroleum engineering vehicle |
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