Smoke detector labyrinth
By using PCB boards to seal the transmitter and receiver tubes in the smoke detector maze, combined with infrared and blue light transmitters and reflective stickers, the problems of production inconvenience and false alarms were solved, achieving efficient and accurate smoke detection.
Patent Information
- Application Number
- CN202422631164.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-10-30
AI Technical Summary
Existing smoke detector mazes require sealing with glue during the production process, increasing labor and glue costs, and the alarm accuracy is insufficient, making them prone to false alarms.
The transmitter and receiver tubes are sealed with PCB board, and infrared and blue light transmitter tubes are used. Reflective stickers are added to the top of the maze shell, and a reflective structure is designed to extend the light path. Combined with detection algorithms, smoke and interference sources are distinguished.
It improves the production efficiency and alarm accuracy of smoke detectors, reduces labor costs, reduces false alarms, and can better distinguish between smoke and interference sources.
Smart Images
Figure CN223526768U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a smoke alarm technology field especially relates to a smoke detector labyrinth. BACKGROUND
[0002] The working principle of photoelectric sensing smoke fire detector is that photoelectric receiving tube generates electric signal under the reflection light irradiation, when the light emitted by photoelectric light emitting tube meets fire smoke and produces reflection, photoelectric receiving tube receives light signal, and if reaching the set alarm threshold value, alarm signal is sent. In normal smoke-free monitoring state, the photosensitive element of the detector only receives a small amount of reflected light, when smoke particles enter the labyrinth detection chamber, the light emitted by the light emitting element is scattered or reflected to the photosensitive element, and when sufficient light signal is received, fire alarm is sent. At present, there are various smoke detection alarms on the market, basically the emission tube and the receiving tube of the labyrinth need to be sealed by glue, which is not convenient for production, increases labor cost and glue cost, most of the glue on the market is irritating, long-term workers are prone to fatigue, and has an impact on the workers' body. In addition, the detection alarm accuracy of some detectors is not enough, and false alarms are easy to occur.
[0003] Therefore, it is necessary to provide a smoke detector labyrinth which can better distinguish smoke and interference source, has accurate alarm, and is convenient for production and reduces labor. SUMMARY
[0004] The utility model discloses a kind of smoke detector labyrinths, which can effectively solve the technical problems involved in the background art.
[0005] To achieve the above object, the technical scheme of the utility model is as follows:
[0006] A smoke detector labyrinth includes an upper shell, a lower shell, an emission tube and a receiving tube. The upper shell is mounted on the lower shell. The upper shell and the lower shell enclose a smoke detection space. The lower shell is mounted on a PCB board. The lower shell has through holes at the bottom, which communicate with the smoke detection space. The number of through holes corresponds to the number of emission tubes and receiving tubes. The emission tubes and receiving tubes are mounted on the PCB board and pass through corresponding through holes to enter the smoke detection space. The lower shell has mounting seats corresponding to the positions of through holes. The mounting seats are located in the smoke detection space. The mounting seats are open upward and downward. The receiving tube corresponding mounting seat has a baffle above it, and a gap is provided between the baffle and the mounting seat. The upper shell has a reflective piece, which is located in the smoke detection space.
[0007] As a preferred improvement of the utility model, the emission tube includes an infrared emission tube and a blue light emission tube.
[0008] As a preferred improvement of the utility model: infrared emission tube wavelength is 920nm, blue light emission tube wavelength is 470nm.
[0009] As a preferred improvement of the utility model: the upper shell side wall is equipped with a plurality of holes, and serves as a smoke inlet.
[0010] As a preferred improvement of the utility model: the upper shell is equipped with a plurality of positioning columns matched with the lower shell, wherein one of the positioning columns is equipped with a bone site.
[0011] As a preferred improvement of the utility model: the lower shell is installed on the PCB through buckling.
[0012] As a preferred improvement of the utility model: the emission tube and the receiving tube are perpendicular to the bottom of the lower shell.
[0013] As a preferred improvement of the utility model: the light reflecting piece is a light reflecting sticker.
[0014] As a preferred improvement of the utility model: the emission tube and the receiving tube are located in the inner cavity of the mounting seat.
[0015] As a preferred improvement of the utility model: the emission tube and the receiving tube are adjacently arranged, and the light reflecting piece is located directly above the emission tube and the receiving tube.
[0016] The utility model has the advantages as follows:
[0017] Directly use the PCB to seal the emission tube and the receiving tube, which is convenient for production and high in efficiency, add the light reflecting sticker on the top of the labyrinth upper shell, reflect the infrared and blue light back, so that the light path is relatively long, the reflected light of the smoke particles is more, and the stability is good, the blue light and the infrared light are synchronously detected, the smoke and the interference source can be better distinguished, and the precision of the smoke alarm is improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without paying creative labor for the ordinary skilled in the art.
[0019] Figure 1 It is a schematic view of the labyrinth of the smoke detector of the utility model;
[0020] Figure 2 It is a labyrinth structure size schematic view of the utility model;
[0021] Figure 3The utility model labyrinth structure disintegrates schematic drawing;
[0022] Figure 4 The utility model upper shell structure schematic drawing;
[0023] Figure 5 The utility model lower shell structure schematic drawing;
[0024] Figure 6 The utility model labyrinth structure sectional view.
[0025] In the drawing: 100-upper shell, 110-smoke import, 120-reflective piece, 130-positioning column, 200-lower shell, 210-through hole, 220-buckle, 230-mounting seat, 240-baffle, 241-gap, 300-emitting tube, 310-infrared emitting tube, 320-blue light emitting tube, 330-infrared light light path, 340-blue light light path, 400-receiving tube. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.
[0028] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0029] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0030] In addition, the technical solutions among various embodiments of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.
[0031] Please refer to Figures 1-6As shown, the utility model provides a kind of smoke detector labyrinth, including upper shell 100, lower shell 200, emission tube 300 and receiving tube 400, the upper shell 100 is installed on the lower shell 200, the upper shell 100 and the lower shell 200 are enclosed into smoke detection space, the sidewall of the upper shell 100 is equipped with multiple holes, and as smoke import 110, it is also export, the upper shell 100 is equipped with multiple positioning column 130 with the lower shell 200 cooperation, wherein one positioning column 130 is equipped with bone site, the lower shell 200 is installed on PCB board, preferably, the lower shell 200 is installed on PCB board by buckle 220, the bottom of the lower shell 200 is equipped with through-hole 210 being communicated with smoke detection space, the number of through-hole 210 corresponds with the number of emission tube 300 and receiving tube 400 (this embodiment is three), emission tube 300 and receiving tube 400 are installed on PCB board and pass through corresponding through-hole 210 and enter smoke detection space, emission tube 300 and receiving tube 400 are perpendicular to the bottom of the lower shell 200, the lower shell 200 is equipped with mounting seat 230 corresponding the position of through-hole 210, the mounting seat 230 is located in smoke detection space, and emission tube 300 and receiving tube 400 are located in the inner cavity of mounting seat 230.The mounting seat 230 is upper and lower opening, the upper side of the mounting seat 230 corresponding receiving tube 400 is equipped with baffle 240, and gap 241 is equipped between baffle 240 and the mounting seat 230 (reflected light is contacted receiving tube through gap), the upper shell 100 is equipped with light reflection piece 120, preferably, the light reflection piece 120 is light reflection sticker, and the light reflection piece 120 is located in smoke detection space.In this embodiment, emission tube 300 and receiving tube 400 are adjacently arranged, and the light reflection piece 120 is located directly above emission tube 300 and receiving tube 400.The emission tube 300 includes infrared emission tube 310 and blue light emission tube 320, the infrared emission tube 310 emits wavelength 920nm, and the blue light emission tube 320 emits wavelength 470nm.
[0032] Working principle:
[0033] In order to meet the technical and production requirements of the smoke detection alarm, in order to make the direction and consistency of the smoke better and eliminate false alarms, the original maze is improved, two emitting tubes (one infrared and the other blue light) and one receiving tube are placed vertically to the direction of the maze, so that the three tubes can be directly placed vertically on the black PCB, and the black PCB is directly used to seal the three tubes, which is very convenient for production. Because the tubes are placed vertically, the light path in the maze is relatively short, the light reflected by the smoke particles is relatively small, and the light to the receiving tube is also very small, which leads to a large amplification factor on the hardware, the whole machine is unstable and false alarms will occur frequently, therefore, a reflective paper is added on the top of the maze shell to reflect the infrared and blue light back, so that the light path is relatively long, the light reflected by the smoke particles is more, and the stability is good. In order to avoid the reflected light directly irradiating on the receiving tube, an umbrella-shaped structure (baffle 240) is designed above the receiving tube to block the light of the emitting tube directly irradiating on the receiving tube. The ratio of the blue light response and the infrared response of the smoke detection is formed, as the size of the particles becomes smaller, the ratio of the blue light response and the infrared response becomes larger, the detection algorithm can use the ratio, as well as the absolute power level and the time response, so as to better distinguish the smoke and the interference source. In addition, from the consideration of preventing wrong assembly, one of the two positioning columns has a bone position, so as to avoid wrong position. It needs to be further explained that other components are used to achieve the above effects, which should belong to the inventive concept of the utility model, and should belong to the protection scope of the utility model.
[0034] Although the embodiments of the utility model have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, it can be fully applied to various fields suitable for the utility model, and other modifications can be easily realized by those skilled in the art, therefore, the utility model is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.
Claims
1. A smoke detector labyrinth, characterized by: The application relates to a smoke detector, which comprises an upper shell (100), a lower shell (200), an emitting tube (300) and a receiving tube (400), the upper shell (100) is installed on the lower shell (200), the upper shell (100) and the lower shell (200) enclose a smoke detection space, the lower shell (200) is installed on a PCB board, the bottom of the lower shell (200) is provided with through holes (210) in communication with the smoke detection space, the number of the through holes (210) corresponds to the number of the emitting tube (300) and the receiving tube (400), the emitting tube (300) and the receiving tube (400) are installed on the PCB board and pass through the corresponding through holes (210) to enter the smoke detection space, the lower shell (200) is provided with mounting seats (230) corresponding to the positions of the through holes (210), the mounting seats (230) are located in the smoke detection space, the mounting seats (230) are upper and lower opening-shaped, the receiving tube (400) is provided with a baffle (240) above the corresponding mounting seat (230), and a gap (241) is arranged between the baffle (240) and the mounting seat (230), and the upper shell (100) is provided with a light-reflecting piece (120), the light-reflecting piece (120) is located in the smoke detection space.
2. A smoke detector labyrinth according to claim 1, characterised in that: The emitting tube (300) comprises an infrared emitting tube (310) and a blue light emitting tube (320).
3. A smoke detector labyrinth according to claim 2, characterised in that: The infrared emitting tube (310) emits a wavelength of 920 nm, and the blue light emitting tube (320) emits a wavelength of 470 nm.
4. A smoke detector labyrinth according to claim 1, characterized in that: The side wall of the upper shell (100) is provided with a plurality of holes and serves as a smoke inlet (110).
5. A smoke detector labyrinth according to claim 1, characterized in that: The upper shell (100) is provided with a plurality of positioning columns (130) matched with the lower shell (200), one of the positioning columns (130) is provided with a bone site.
6. A smoke detector labyrinth according to claim 1, characterized in that: The lower shell (200) is installed on the PCB board through buckles (220).
7. A smoke detector labyrinth according to claim 1, characterized in that: The emitting tube (300) and the receiving tube (400) are perpendicular to the bottom of the lower shell (200).
8. A smoke detector labyrinth according to claim 1, characterized in that: The light-reflecting piece (120) is a light-reflecting sticker.
9. A smoke detector labyrinth according to claim 1, characterized in that: The emitting tube (300) and the receiving tube (400) are located in the inner cavity of the mounting seat (230).
10. A smoke detector labyrinth according to claim 1, characterized in that: The emitting tube (300) and the receiving tube (400) are arranged adjacently, and the light-reflecting piece (120) is located directly above the emitting tube (300) and the receiving tube (400).